Mercurial > hg > graal-jvmci-8
annotate src/os/linux/vm/os_linux.cpp @ 22851:ddce0b7cee93
8072383: resolve conflicts between open and closed ports
Summary: refactor close to remove references to closed ports
Reviewed-by: kvn, simonis, sgehwolf, dholmes
author | dlong |
---|---|
date | Tue, 24 Feb 2015 15:04:52 -0500 |
parents | 6e0cb14ce59b |
children | 8461d0b03127 |
rev | line source |
---|---|
0 | 1 /* |
22851
ddce0b7cee93
8072383: resolve conflicts between open and closed ports
dlong
parents:
20375
diff
changeset
|
2 * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1537
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1537
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1537
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 // no precompiled headers |
26 #include "classfile/classLoader.hpp" | |
27 #include "classfile/systemDictionary.hpp" | |
28 #include "classfile/vmSymbols.hpp" | |
29 #include "code/icBuffer.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "compiler/compileBroker.hpp" | |
7199
cd3d6a6b95d9
8003240: x86: move MacroAssembler into separate file
twisti
parents:
6966
diff
changeset
|
32 #include "compiler/disassembler.hpp" |
1972 | 33 #include "interpreter/interpreter.hpp" |
34 #include "jvm_linux.h" | |
35 #include "memory/allocation.inline.hpp" | |
36 #include "memory/filemap.hpp" | |
37 #include "mutex_linux.inline.hpp" | |
38 #include "oops/oop.inline.hpp" | |
39 #include "os_share_linux.hpp" | |
40 #include "prims/jniFastGetField.hpp" | |
41 #include "prims/jvm.h" | |
42 #include "prims/jvm_misc.hpp" | |
43 #include "runtime/arguments.hpp" | |
44 #include "runtime/extendedPC.hpp" | |
45 #include "runtime/globals.hpp" | |
46 #include "runtime/interfaceSupport.hpp" | |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
47 #include "runtime/init.hpp" |
1972 | 48 #include "runtime/java.hpp" |
49 #include "runtime/javaCalls.hpp" | |
50 #include "runtime/mutexLocker.hpp" | |
51 #include "runtime/objectMonitor.hpp" | |
20197
ce8f6bb717c9
8042195: Introduce umbrella header orderAccess.inline.hpp.
goetz
parents:
17937
diff
changeset
|
52 #include "runtime/orderAccess.inline.hpp" |
1972 | 53 #include "runtime/osThread.hpp" |
54 #include "runtime/perfMemory.hpp" | |
55 #include "runtime/sharedRuntime.hpp" | |
56 #include "runtime/statSampler.hpp" | |
57 #include "runtime/stubRoutines.hpp" | |
7180
f34d701e952e
8003935: Simplify the needed includes for using Thread::current()
stefank
parents:
6966
diff
changeset
|
58 #include "runtime/thread.inline.hpp" |
1972 | 59 #include "runtime/threadCritical.hpp" |
60 #include "runtime/timer.hpp" | |
61 #include "services/attachListener.hpp" | |
8711
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
62 #include "services/memTracker.hpp" |
1972 | 63 #include "services/runtimeService.hpp" |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
64 #include "utilities/decoder.hpp" |
1972 | 65 #include "utilities/defaultStream.hpp" |
66 #include "utilities/events.hpp" | |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
67 #include "utilities/elfFile.hpp" |
1972 | 68 #include "utilities/growableArray.hpp" |
69 #include "utilities/vmError.hpp" | |
0 | 70 |
71 // put OS-includes here | |
72 # include <sys/types.h> | |
73 # include <sys/mman.h> | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
74 # include <sys/stat.h> |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
75 # include <sys/select.h> |
0 | 76 # include <pthread.h> |
77 # include <signal.h> | |
78 # include <errno.h> | |
79 # include <dlfcn.h> | |
80 # include <stdio.h> | |
81 # include <unistd.h> | |
82 # include <sys/resource.h> | |
83 # include <pthread.h> | |
84 # include <sys/stat.h> | |
85 # include <sys/time.h> | |
86 # include <sys/times.h> | |
87 # include <sys/utsname.h> | |
88 # include <sys/socket.h> | |
89 # include <sys/wait.h> | |
90 # include <pwd.h> | |
91 # include <poll.h> | |
92 # include <semaphore.h> | |
93 # include <fcntl.h> | |
94 # include <string.h> | |
95 # include <syscall.h> | |
96 # include <sys/sysinfo.h> | |
97 # include <gnu/libc-version.h> | |
98 # include <sys/ipc.h> | |
99 # include <sys/shm.h> | |
100 # include <link.h> | |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
101 # include <stdint.h> |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
102 # include <inttypes.h> |
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
103 # include <sys/ioctl.h> |
0 | 104 |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
105 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
106 |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
107 // if RUSAGE_THREAD for getrusage() has not been defined, do it here. The code calling |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
108 // getrusage() is prepared to handle the associated failure. |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
109 #ifndef RUSAGE_THREAD |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
110 #define RUSAGE_THREAD (1) /* only the calling thread */ |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
111 #endif |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
112 |
0 | 113 #define MAX_PATH (2 * K) |
114 | |
17738 | 115 #define MAX_SECS 100000000 |
116 | |
0 | 117 // for timer info max values which include all bits |
118 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
119 | |
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
120 #define LARGEPAGES_BIT (1 << 6) |
0 | 121 //////////////////////////////////////////////////////////////////////////////// |
122 // global variables | |
123 julong os::Linux::_physical_memory = 0; | |
124 | |
125 address os::Linux::_initial_thread_stack_bottom = NULL; | |
126 uintptr_t os::Linux::_initial_thread_stack_size = 0; | |
127 | |
128 int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL; | |
129 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL; | |
130 Mutex* os::Linux::_createThread_lock = NULL; | |
131 pthread_t os::Linux::_main_thread; | |
132 int os::Linux::_page_size = -1; | |
10164
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
133 const int os::Linux::_vm_default_page_size = (8 * K); |
0 | 134 bool os::Linux::_is_floating_stack = false; |
135 bool os::Linux::_is_NPTL = false; | |
136 bool os::Linux::_supports_fast_thread_cpu_time = false; | |
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
137 const char * os::Linux::_glibc_version = NULL; |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
138 const char * os::Linux::_libpthread_version = NULL; |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
139 pthread_condattr_t os::Linux::_condattr[1]; |
0 | 140 |
141 static jlong initial_time_count=0; | |
142 | |
143 static int clock_tics_per_sec = 100; | |
144 | |
145 // For diagnostics to print a message once. see run_periodic_checks | |
146 static sigset_t check_signal_done; | |
14391 | 147 static bool check_signals = true; |
0 | 148 |
149 static pid_t _initial_pid = 0; | |
150 | |
151 /* Signal number used to suspend/resume a thread */ | |
152 | |
153 /* do not use any signal number less than SIGSEGV, see 4355769 */ | |
154 static int SR_signum = SIGUSR2; | |
155 sigset_t SR_sigset; | |
156 | |
242 | 157 /* Used to protect dlsym() calls */ |
158 static pthread_mutex_t dl_mutex; | |
159 | |
10405 | 160 // Declarations |
161 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); | |
162 | |
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
163 #ifdef JAVASE_EMBEDDED |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
164 class MemNotifyThread: public Thread { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
165 friend class VMStructs; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
166 public: |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
167 virtual void run(); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
168 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
169 private: |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
170 static MemNotifyThread* _memnotify_thread; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
171 int _fd; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
172 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
173 public: |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
174 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
175 // Constructor |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
176 MemNotifyThread(int fd); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
177 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
178 // Tester |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
179 bool is_memnotify_thread() const { return true; } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
180 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
181 // Printing |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
182 char* name() const { return (char*)"Linux MemNotify Thread"; } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
183 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
184 // Returns the single instance of the MemNotifyThread |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
185 static MemNotifyThread* memnotify_thread() { return _memnotify_thread; } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
186 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
187 // Create and start the single instance of MemNotifyThread |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
188 static void start(); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
189 }; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
190 #endif // JAVASE_EMBEDDED |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
191 |
0 | 192 // utility functions |
193 | |
194 static int SR_initialize(); | |
195 | |
196 julong os::available_memory() { | |
197 return Linux::available_memory(); | |
198 } | |
199 | |
200 julong os::Linux::available_memory() { | |
201 // values in struct sysinfo are "unsigned long" | |
202 struct sysinfo si; | |
203 sysinfo(&si); | |
204 | |
205 return (julong)si.freeram * si.mem_unit; | |
206 } | |
207 | |
208 julong os::physical_memory() { | |
209 return Linux::physical_memory(); | |
210 } | |
211 | |
212 //////////////////////////////////////////////////////////////////////////////// | |
213 // environment support | |
214 | |
215 bool os::getenv(const char* name, char* buf, int len) { | |
216 const char* val = ::getenv(name); | |
217 if (val != NULL && strlen(val) < (size_t)len) { | |
218 strcpy(buf, val); | |
219 return true; | |
220 } | |
221 if (len > 0) buf[0] = 0; // return a null string | |
222 return false; | |
223 } | |
224 | |
225 | |
226 // Return true if user is running as root. | |
227 | |
228 bool os::have_special_privileges() { | |
229 static bool init = false; | |
230 static bool privileges = false; | |
231 if (!init) { | |
232 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
233 init = true; | |
234 } | |
235 return privileges; | |
236 } | |
237 | |
238 | |
239 #ifndef SYS_gettid | |
240 // i386: 224, ia64: 1105, amd64: 186, sparc 143 | |
241 #ifdef __ia64__ | |
242 #define SYS_gettid 1105 | |
243 #elif __i386__ | |
244 #define SYS_gettid 224 | |
245 #elif __amd64__ | |
246 #define SYS_gettid 186 | |
247 #elif __sparc__ | |
248 #define SYS_gettid 143 | |
249 #else | |
250 #error define gettid for the arch | |
251 #endif | |
252 #endif | |
253 | |
254 // Cpu architecture string | |
22851
ddce0b7cee93
8072383: resolve conflicts between open and closed ports
dlong
parents:
20375
diff
changeset
|
255 static char cpu_arch[] = HOTSPOT_LIB_ARCH; |
0 | 256 |
257 // pid_t gettid() | |
258 // | |
259 // Returns the kernel thread id of the currently running thread. Kernel | |
260 // thread id is used to access /proc. | |
261 // | |
262 // (Note that getpid() on LinuxThreads returns kernel thread id too; but | |
263 // on NPTL, it returns the same pid for all threads, as required by POSIX.) | |
264 // | |
265 pid_t os::Linux::gettid() { | |
266 int rslt = syscall(SYS_gettid); | |
267 if (rslt == -1) { | |
268 // old kernel, no NPTL support | |
269 return getpid(); | |
270 } else { | |
271 return (pid_t)rslt; | |
272 } | |
273 } | |
274 | |
275 // Most versions of linux have a bug where the number of processors are | |
276 // determined by looking at the /proc file system. In a chroot environment, | |
277 // the system call returns 1. This causes the VM to act as if it is | |
278 // a single processor and elide locking (see is_MP() call). | |
279 static bool unsafe_chroot_detected = false; | |
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
280 static const char *unstable_chroot_error = "/proc file system not found.\n" |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
281 "Java may be unstable running multithreaded in a chroot " |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
282 "environment on Linux when /proc filesystem is not mounted."; |
0 | 283 |
284 void os::Linux::initialize_system_info() { | |
1123
167c2986d91b
6843629: Make current hotspot build part of jdk5 control build
phh
parents:
1117
diff
changeset
|
285 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); |
167c2986d91b
6843629: Make current hotspot build part of jdk5 control build
phh
parents:
1117
diff
changeset
|
286 if (processor_count() == 1) { |
0 | 287 pid_t pid = os::Linux::gettid(); |
288 char fname[32]; | |
289 jio_snprintf(fname, sizeof(fname), "/proc/%d", pid); | |
290 FILE *fp = fopen(fname, "r"); | |
291 if (fp == NULL) { | |
292 unsafe_chroot_detected = true; | |
293 } else { | |
294 fclose(fp); | |
295 } | |
296 } | |
297 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
1123
167c2986d91b
6843629: Make current hotspot build part of jdk5 control build
phh
parents:
1117
diff
changeset
|
298 assert(processor_count() > 0, "linux error"); |
0 | 299 } |
300 | |
301 void os::init_system_properties_values() { | |
302 // The next steps are taken in the product version: | |
303 // | |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
304 // Obtain the JAVA_HOME value from the location of libjvm.so. |
0 | 305 // This library should be located at: |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
306 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
0 | 307 // |
308 // If "/jre/lib/" appears at the right place in the path, then we | |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
309 // assume libjvm.so is installed in a JDK and we use this path. |
0 | 310 // |
311 // Otherwise exit with message: "Could not create the Java virtual machine." | |
312 // | |
313 // The following extra steps are taken in the debugging version: | |
314 // | |
315 // If "/jre/lib/" does NOT appear at the right place in the path | |
316 // instead of exit check for $JAVA_HOME environment variable. | |
317 // | |
318 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
319 // then we append a fake suffix "hotspot/libjvm.so" to this path so |
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
320 // it looks like libjvm.so is installed there |
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
321 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
0 | 322 // |
323 // Otherwise exit. | |
324 // | |
325 // Important note: if the location of libjvm.so changes this | |
326 // code needs to be changed accordingly. | |
327 | |
17848
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
328 // See ld(1): |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
329 // The linker uses the following search paths to locate required |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
330 // shared libraries: |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
331 // 1: ... |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
332 // ... |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
333 // 7: The default directories, normally /lib and /usr/lib. |
509
9656bebe85a7
6778662: fixes 64-bits libraries directory search paths on linux
kvn
parents:
477
diff
changeset
|
334 #if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390)) |
9656bebe85a7
6778662: fixes 64-bits libraries directory search paths on linux
kvn
parents:
477
diff
changeset
|
335 #define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib" |
9656bebe85a7
6778662: fixes 64-bits libraries directory search paths on linux
kvn
parents:
477
diff
changeset
|
336 #else |
0 | 337 #define DEFAULT_LIBPATH "/lib:/usr/lib" |
509
9656bebe85a7
6778662: fixes 64-bits libraries directory search paths on linux
kvn
parents:
477
diff
changeset
|
338 #endif |
0 | 339 |
17848
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
340 // Base path of extensions installed on the system. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
341 #define SYS_EXT_DIR "/usr/java/packages" |
0 | 342 #define EXTENSIONS_DIR "/lib/ext" |
343 #define ENDORSED_DIR "/lib/endorsed" | |
17848
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
344 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
345 // Buffer that fits several sprintfs. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
346 // Note that the space for the colon and the trailing null are provided |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
347 // by the nulls included by the sizeof operator. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
348 const size_t bufsize = |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
349 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
350 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
351 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
352 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
353 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
354 // sysclasspath, java_home, dll_dir |
0 | 355 { |
17848
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
356 char *pslash; |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
357 os::jvm_path(buf, bufsize); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
358 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
359 // Found the full path to libjvm.so. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
360 // Now cut the path to <java_home>/jre if we can. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
361 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
362 pslash = strrchr(buf, '/'); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
363 if (pslash != NULL) { |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
364 *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
365 } |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
366 Arguments::set_dll_dir(buf); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
367 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
368 if (pslash != NULL) { |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
369 pslash = strrchr(buf, '/'); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
370 if (pslash != NULL) { |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
371 *pslash = '\0'; // Get rid of /<arch>. |
0 | 372 pslash = strrchr(buf, '/'); |
373 if (pslash != NULL) { | |
17848
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
374 *pslash = '\0'; // Get rid of /lib. |
0 | 375 } |
17848
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
376 } |
0 | 377 } |
17848
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
378 Arguments::set_java_home(buf); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
379 set_boot_path('/', ':'); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
380 } |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
381 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
382 // Where to look for native libraries. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
383 // |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
384 // Note: Due to a legacy implementation, most of the library path |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
385 // is set in the launcher. This was to accomodate linking restrictions |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
386 // on legacy Linux implementations (which are no longer supported). |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
387 // Eventually, all the library path setting will be done here. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
388 // |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
389 // However, to prevent the proliferation of improperly built native |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
390 // libraries, the new path component /usr/java/packages is added here. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
391 // Eventually, all the library path setting will be done here. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
392 { |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
393 // Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
394 // should always exist (until the legacy problem cited above is |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
395 // addressed). |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
396 const char *v = ::getenv("LD_LIBRARY_PATH"); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
397 const char *v_colon = ":"; |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
398 if (v == NULL) { v = ""; v_colon = ""; } |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
399 // That's +1 for the colon and +1 for the trailing '\0'. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
400 char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
401 strlen(v) + 1 + |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
402 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH) + 1, |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
403 mtInternal); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
404 sprintf(ld_library_path, "%s%s" SYS_EXT_DIR "/lib/%s:" DEFAULT_LIBPATH, v, v_colon, cpu_arch); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
405 Arguments::set_library_path(ld_library_path); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
406 FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
407 } |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
408 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
409 // Extensions directories. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
410 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
411 Arguments::set_ext_dirs(buf); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
412 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
413 // Endorsed standards default directory. |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
414 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
415 Arguments::set_endorsed_dirs(buf); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
416 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
417 FREE_C_HEAP_ARRAY(char, buf, mtInternal); |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
418 |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
419 #undef DEFAULT_LIBPATH |
6048424d3865
8038201: Clean up misleading usage of malloc() in init_system_properties_values()
goetz
parents:
17845
diff
changeset
|
420 #undef SYS_EXT_DIR |
0 | 421 #undef EXTENSIONS_DIR |
422 #undef ENDORSED_DIR | |
423 } | |
424 | |
425 //////////////////////////////////////////////////////////////////////////////// | |
426 // breakpoint support | |
427 | |
428 void os::breakpoint() { | |
429 BREAKPOINT; | |
430 } | |
431 | |
432 extern "C" void breakpoint() { | |
433 // use debugger to set breakpoint here | |
434 } | |
435 | |
436 //////////////////////////////////////////////////////////////////////////////// | |
437 // signal support | |
438 | |
439 debug_only(static bool signal_sets_initialized = false); | |
440 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
441 | |
442 bool os::Linux::is_sig_ignored(int sig) { | |
443 struct sigaction oact; | |
444 sigaction(sig, (struct sigaction*)NULL, &oact); | |
445 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
446 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
447 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
448 return true; | |
449 else | |
450 return false; | |
451 } | |
452 | |
453 void os::Linux::signal_sets_init() { | |
454 // Should also have an assertion stating we are still single-threaded. | |
455 assert(!signal_sets_initialized, "Already initialized"); | |
456 // Fill in signals that are necessarily unblocked for all threads in | |
457 // the VM. Currently, we unblock the following signals: | |
458 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
459 // by -Xrs (=ReduceSignalUsage)); | |
460 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
461 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
462 // the dispositions or masks wrt these signals. | |
463 // Programs embedding the VM that want to use the above signals for their | |
464 // own purposes must, at this time, use the "-Xrs" option to prevent | |
465 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
466 // (See bug 4345157, and other related bugs). | |
467 // In reality, though, unblocking these signals is really a nop, since | |
468 // these signals are not blocked by default. | |
469 sigemptyset(&unblocked_sigs); | |
470 sigemptyset(&allowdebug_blocked_sigs); | |
471 sigaddset(&unblocked_sigs, SIGILL); | |
472 sigaddset(&unblocked_sigs, SIGSEGV); | |
473 sigaddset(&unblocked_sigs, SIGBUS); | |
474 sigaddset(&unblocked_sigs, SIGFPE); | |
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
475 #if defined(PPC64) |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
476 sigaddset(&unblocked_sigs, SIGTRAP); |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
477 #endif |
0 | 478 sigaddset(&unblocked_sigs, SR_signum); |
479 | |
480 if (!ReduceSignalUsage) { | |
481 if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
482 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
483 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
484 } | |
485 if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
486 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
487 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
488 } | |
489 if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
490 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
491 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
492 } | |
493 } | |
494 // Fill in signals that are blocked by all but the VM thread. | |
495 sigemptyset(&vm_sigs); | |
496 if (!ReduceSignalUsage) | |
497 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
498 debug_only(signal_sets_initialized = true); | |
499 | |
500 } | |
501 | |
502 // These are signals that are unblocked while a thread is running Java. | |
503 // (For some reason, they get blocked by default.) | |
504 sigset_t* os::Linux::unblocked_signals() { | |
505 assert(signal_sets_initialized, "Not initialized"); | |
506 return &unblocked_sigs; | |
507 } | |
508 | |
509 // These are the signals that are blocked while a (non-VM) thread is | |
510 // running Java. Only the VM thread handles these signals. | |
511 sigset_t* os::Linux::vm_signals() { | |
512 assert(signal_sets_initialized, "Not initialized"); | |
513 return &vm_sigs; | |
514 } | |
515 | |
516 // These are signals that are blocked during cond_wait to allow debugger in | |
517 sigset_t* os::Linux::allowdebug_blocked_signals() { | |
518 assert(signal_sets_initialized, "Not initialized"); | |
519 return &allowdebug_blocked_sigs; | |
520 } | |
521 | |
522 void os::Linux::hotspot_sigmask(Thread* thread) { | |
523 | |
524 //Save caller's signal mask before setting VM signal mask | |
525 sigset_t caller_sigmask; | |
526 pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); | |
527 | |
528 OSThread* osthread = thread->osthread(); | |
529 osthread->set_caller_sigmask(caller_sigmask); | |
530 | |
531 pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL); | |
532 | |
533 if (!ReduceSignalUsage) { | |
534 if (thread->is_VM_thread()) { | |
535 // Only the VM thread handles BREAK_SIGNAL ... | |
536 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); | |
537 } else { | |
538 // ... all other threads block BREAK_SIGNAL | |
539 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); | |
540 } | |
541 } | |
542 } | |
543 | |
544 ////////////////////////////////////////////////////////////////////////////// | |
545 // detecting pthread library | |
546 | |
547 void os::Linux::libpthread_init() { | |
548 // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION | |
549 // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a | |
550 // generic name for earlier versions. | |
551 // Define macros here so we can build HotSpot on old systems. | |
552 # ifndef _CS_GNU_LIBC_VERSION | |
553 # define _CS_GNU_LIBC_VERSION 2 | |
554 # endif | |
555 # ifndef _CS_GNU_LIBPTHREAD_VERSION | |
556 # define _CS_GNU_LIBPTHREAD_VERSION 3 | |
557 # endif | |
558 | |
559 size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0); | |
560 if (n > 0) { | |
6197 | 561 char *str = (char *)malloc(n, mtInternal); |
0 | 562 confstr(_CS_GNU_LIBC_VERSION, str, n); |
563 os::Linux::set_glibc_version(str); | |
564 } else { | |
565 // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() | |
566 static char _gnu_libc_version[32]; | |
567 jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), | |
568 "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); | |
569 os::Linux::set_glibc_version(_gnu_libc_version); | |
570 } | |
571 | |
572 n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0); | |
573 if (n > 0) { | |
6197 | 574 char *str = (char *)malloc(n, mtInternal); |
0 | 575 confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n); |
576 // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells | |
577 // us "NPTL-0.29" even we are running with LinuxThreads. Check if this | |
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
578 // is the case. LinuxThreads has a hard limit on max number of threads. |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
579 // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value. |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
580 // On the other hand, NPTL does not have such a limit, sysconf() |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
581 // will return -1 and errno is not changed. Check if it is really NPTL. |
0 | 582 if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 && |
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
583 strstr(str, "NPTL") && |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
584 sysconf(_SC_THREAD_THREADS_MAX) > 0) { |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
585 free(str); |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
586 os::Linux::set_libpthread_version("linuxthreads"); |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
587 } else { |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
588 os::Linux::set_libpthread_version(str); |
0 | 589 } |
590 } else { | |
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
591 // glibc before 2.3.2 only has LinuxThreads. |
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
592 os::Linux::set_libpthread_version("linuxthreads"); |
0 | 593 } |
594 | |
595 if (strstr(libpthread_version(), "NPTL")) { | |
596 os::Linux::set_is_NPTL(); | |
597 } else { | |
598 os::Linux::set_is_LinuxThreads(); | |
599 } | |
600 | |
601 // LinuxThreads have two flavors: floating-stack mode, which allows variable | |
602 // stack size; and fixed-stack mode. NPTL is always floating-stack. | |
603 if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) { | |
604 os::Linux::set_is_floating_stack(); | |
605 } | |
606 } | |
607 | |
608 ///////////////////////////////////////////////////////////////////////////// | |
609 // thread stack | |
610 | |
611 // Force Linux kernel to expand current thread stack. If "bottom" is close | |
612 // to the stack guard, caller should block all signals. | |
613 // | |
614 // MAP_GROWSDOWN: | |
615 // A special mmap() flag that is used to implement thread stacks. It tells | |
616 // kernel that the memory region should extend downwards when needed. This | |
617 // allows early versions of LinuxThreads to only mmap the first few pages | |
618 // when creating a new thread. Linux kernel will automatically expand thread | |
619 // stack as needed (on page faults). | |
620 // | |
621 // However, because the memory region of a MAP_GROWSDOWN stack can grow on | |
622 // demand, if a page fault happens outside an already mapped MAP_GROWSDOWN | |
623 // region, it's hard to tell if the fault is due to a legitimate stack | |
624 // access or because of reading/writing non-exist memory (e.g. buffer | |
625 // overrun). As a rule, if the fault happens below current stack pointer, | |
626 // Linux kernel does not expand stack, instead a SIGSEGV is sent to the | |
627 // application (see Linux kernel fault.c). | |
628 // | |
629 // This Linux feature can cause SIGSEGV when VM bangs thread stack for | |
630 // stack overflow detection. | |
631 // | |
632 // Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do | |
633 // not use this flag. However, the stack of initial thread is not created | |
634 // by pthread, it is still MAP_GROWSDOWN. Also it's possible (though | |
635 // unlikely) that user code can create a thread with MAP_GROWSDOWN stack | |
636 // and then attach the thread to JVM. | |
637 // | |
638 // To get around the problem and allow stack banging on Linux, we need to | |
639 // manually expand thread stack after receiving the SIGSEGV. | |
640 // | |
641 // There are two ways to expand thread stack to address "bottom", we used | |
642 // both of them in JVM before 1.5: | |
643 // 1. adjust stack pointer first so that it is below "bottom", and then | |
644 // touch "bottom" | |
645 // 2. mmap() the page in question | |
646 // | |
647 // Now alternate signal stack is gone, it's harder to use 2. For instance, | |
648 // if current sp is already near the lower end of page 101, and we need to | |
649 // call mmap() to map page 100, it is possible that part of the mmap() frame | |
650 // will be placed in page 100. When page 100 is mapped, it is zero-filled. | |
651 // That will destroy the mmap() frame and cause VM to crash. | |
652 // | |
653 // The following code works by adjusting sp first, then accessing the "bottom" | |
654 // page to force a page fault. Linux kernel will then automatically expand the | |
655 // stack mapping. | |
656 // | |
657 // _expand_stack_to() assumes its frame size is less than page size, which | |
658 // should always be true if the function is not inlined. | |
659 | |
660 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute | |
661 #define NOINLINE | |
662 #else | |
663 #define NOINLINE __attribute__ ((noinline)) | |
664 #endif | |
665 | |
666 static void _expand_stack_to(address bottom) NOINLINE; | |
667 | |
668 static void _expand_stack_to(address bottom) { | |
669 address sp; | |
670 size_t size; | |
671 volatile char *p; | |
672 | |
673 // Adjust bottom to point to the largest address within the same page, it | |
674 // gives us a one-page buffer if alloca() allocates slightly more memory. | |
675 bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size()); | |
676 bottom += os::Linux::page_size() - 1; | |
677 | |
678 // sp might be slightly above current stack pointer; if that's the case, we | |
679 // will alloca() a little more space than necessary, which is OK. Don't use | |
680 // os::current_stack_pointer(), as its result can be slightly below current | |
681 // stack pointer, causing us to not alloca enough to reach "bottom". | |
682 sp = (address)&sp; | |
683 | |
684 if (sp > bottom) { | |
685 size = sp - bottom; | |
686 p = (volatile char *)alloca(size); | |
687 assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?"); | |
688 p[0] = '\0'; | |
689 } | |
690 } | |
691 | |
692 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) { | |
693 assert(t!=NULL, "just checking"); | |
694 assert(t->osthread()->expanding_stack(), "expand should be set"); | |
695 assert(t->stack_base() != NULL, "stack_base was not initialized"); | |
696 | |
697 if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) { | |
698 sigset_t mask_all, old_sigset; | |
699 sigfillset(&mask_all); | |
700 pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset); | |
701 _expand_stack_to(addr); | |
702 pthread_sigmask(SIG_SETMASK, &old_sigset, NULL); | |
703 return true; | |
704 } | |
705 return false; | |
706 } | |
707 | |
708 ////////////////////////////////////////////////////////////////////////////// | |
709 // create new thread | |
710 | |
711 static address highest_vm_reserved_address(); | |
712 | |
713 // check if it's safe to start a new thread | |
714 static bool _thread_safety_check(Thread* thread) { | |
715 if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) { | |
716 // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat) | |
717 // Heap is mmap'ed at lower end of memory space. Thread stacks are | |
718 // allocated (MAP_FIXED) from high address space. Every thread stack | |
719 // occupies a fixed size slot (usually 2Mbytes, but user can change | |
720 // it to other values if they rebuild LinuxThreads). | |
721 // | |
722 // Problem with MAP_FIXED is that mmap() can still succeed even part of | |
723 // the memory region has already been mmap'ed. That means if we have too | |
724 // many threads and/or very large heap, eventually thread stack will | |
725 // collide with heap. | |
726 // | |
727 // Here we try to prevent heap/stack collision by comparing current | |
728 // stack bottom with the highest address that has been mmap'ed by JVM | |
729 // plus a safety margin for memory maps created by native code. | |
730 // | |
731 // This feature can be disabled by setting ThreadSafetyMargin to 0 | |
732 // | |
733 if (ThreadSafetyMargin > 0) { | |
734 address stack_bottom = os::current_stack_base() - os::current_stack_size(); | |
735 | |
736 // not safe if our stack extends below the safety margin | |
737 return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address(); | |
738 } else { | |
739 return true; | |
740 } | |
741 } else { | |
742 // Floating stack LinuxThreads or NPTL: | |
743 // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When | |
744 // there's not enough space left, pthread_create() will fail. If we come | |
745 // here, that means enough space has been reserved for stack. | |
746 return true; | |
747 } | |
748 } | |
749 | |
750 // Thread start routine for all newly created threads | |
751 static void *java_start(Thread *thread) { | |
752 // Try to randomize the cache line index of hot stack frames. | |
753 // This helps when threads of the same stack traces evict each other's | |
754 // cache lines. The threads can be either from the same JVM instance, or | |
755 // from different JVM instances. The benefit is especially true for | |
756 // processors with hyperthreading technology. | |
757 static int counter = 0; | |
758 int pid = os::current_process_id(); | |
759 alloca(((pid ^ counter++) & 7) * 128); | |
760 | |
761 ThreadLocalStorage::set_thread(thread); | |
762 | |
763 OSThread* osthread = thread->osthread(); | |
764 Monitor* sync = osthread->startThread_lock(); | |
765 | |
766 // non floating stack LinuxThreads needs extra check, see above | |
767 if (!_thread_safety_check(thread)) { | |
768 // notify parent thread | |
769 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
770 osthread->set_state(ZOMBIE); | |
771 sync->notify_all(); | |
772 return NULL; | |
773 } | |
774 | |
775 // thread_id is kernel thread id (similar to Solaris LWP id) | |
776 osthread->set_thread_id(os::Linux::gettid()); | |
777 | |
778 if (UseNUMA) { | |
779 int lgrp_id = os::numa_get_group_id(); | |
780 if (lgrp_id != -1) { | |
781 thread->set_lgrp_id(lgrp_id); | |
782 } | |
783 } | |
784 // initialize signal mask for this thread | |
785 os::Linux::hotspot_sigmask(thread); | |
786 | |
787 // initialize floating point control register | |
788 os::Linux::init_thread_fpu_state(); | |
789 | |
790 // handshaking with parent thread | |
791 { | |
792 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
793 | |
794 // notify parent thread | |
795 osthread->set_state(INITIALIZED); | |
796 sync->notify_all(); | |
797 | |
798 // wait until os::start_thread() | |
799 while (osthread->get_state() == INITIALIZED) { | |
800 sync->wait(Mutex::_no_safepoint_check_flag); | |
801 } | |
802 } | |
803 | |
804 // call one more level start routine | |
805 thread->run(); | |
806 | |
807 return 0; | |
808 } | |
809 | |
810 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
811 assert(thread->osthread() == NULL, "caller responsible"); | |
812 | |
813 // Allocate the OSThread object | |
814 OSThread* osthread = new OSThread(NULL, NULL); | |
815 if (osthread == NULL) { | |
816 return false; | |
817 } | |
818 | |
819 // set the correct thread state | |
820 osthread->set_thread_type(thr_type); | |
821 | |
822 // Initial state is ALLOCATED but not INITIALIZED | |
823 osthread->set_state(ALLOCATED); | |
824 | |
825 thread->set_osthread(osthread); | |
826 | |
827 // init thread attributes | |
828 pthread_attr_t attr; | |
829 pthread_attr_init(&attr); | |
830 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
831 | |
832 // stack size | |
833 if (os::Linux::supports_variable_stack_size()) { | |
834 // calculate stack size if it's not specified by caller | |
835 if (stack_size == 0) { | |
836 stack_size = os::Linux::default_stack_size(thr_type); | |
837 | |
838 switch (thr_type) { | |
839 case os::java_thread: | |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
840 // Java threads use ThreadStackSize which default value can be |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
841 // changed with the flag -Xss |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
842 assert (JavaThread::stack_size_at_create() > 0, "this should be set"); |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
843 stack_size = JavaThread::stack_size_at_create(); |
0 | 844 break; |
845 case os::compiler_thread: | |
846 if (CompilerThreadStackSize > 0) { | |
847 stack_size = (size_t)(CompilerThreadStackSize * K); | |
848 break; | |
849 } // else fall through: | |
850 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
851 case os::vm_thread: | |
852 case os::pgc_thread: | |
853 case os::cgc_thread: | |
854 case os::watcher_thread: | |
855 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
856 break; | |
857 } | |
858 } | |
859 | |
860 stack_size = MAX2(stack_size, os::Linux::min_stack_allowed); | |
861 pthread_attr_setstacksize(&attr, stack_size); | |
862 } else { | |
863 // let pthread_create() pick the default value. | |
864 } | |
865 | |
866 // glibc guard page | |
867 pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type)); | |
868 | |
869 ThreadState state; | |
870 | |
871 { | |
872 // Serialize thread creation if we are running with fixed stack LinuxThreads | |
873 bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack(); | |
874 if (lock) { | |
875 os::Linux::createThread_lock()->lock_without_safepoint_check(); | |
876 } | |
877 | |
878 pthread_t tid; | |
879 int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); | |
880 | |
881 pthread_attr_destroy(&attr); | |
882 | |
883 if (ret != 0) { | |
884 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
885 perror("pthread_create()"); | |
886 } | |
887 // Need to clean up stuff we've allocated so far | |
888 thread->set_osthread(NULL); | |
889 delete osthread; | |
890 if (lock) os::Linux::createThread_lock()->unlock(); | |
891 return false; | |
892 } | |
893 | |
894 // Store pthread info into the OSThread | |
895 osthread->set_pthread_id(tid); | |
896 | |
897 // Wait until child thread is either initialized or aborted | |
898 { | |
899 Monitor* sync_with_child = osthread->startThread_lock(); | |
900 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
901 while ((state = osthread->get_state()) == ALLOCATED) { | |
902 sync_with_child->wait(Mutex::_no_safepoint_check_flag); | |
903 } | |
904 } | |
905 | |
906 if (lock) { | |
907 os::Linux::createThread_lock()->unlock(); | |
908 } | |
909 } | |
910 | |
911 // Aborted due to thread limit being reached | |
912 if (state == ZOMBIE) { | |
913 thread->set_osthread(NULL); | |
914 delete osthread; | |
915 return false; | |
916 } | |
917 | |
918 // The thread is returned suspended (in state INITIALIZED), | |
919 // and is started higher up in the call chain | |
920 assert(state == INITIALIZED, "race condition"); | |
921 return true; | |
922 } | |
923 | |
924 ///////////////////////////////////////////////////////////////////////////// | |
925 // attach existing thread | |
926 | |
927 // bootstrap the main thread | |
928 bool os::create_main_thread(JavaThread* thread) { | |
929 assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread"); | |
930 return create_attached_thread(thread); | |
931 } | |
932 | |
933 bool os::create_attached_thread(JavaThread* thread) { | |
934 #ifdef ASSERT | |
935 thread->verify_not_published(); | |
936 #endif | |
937 | |
938 // Allocate the OSThread object | |
939 OSThread* osthread = new OSThread(NULL, NULL); | |
940 | |
941 if (osthread == NULL) { | |
942 return false; | |
943 } | |
944 | |
945 // Store pthread info into the OSThread | |
946 osthread->set_thread_id(os::Linux::gettid()); | |
947 osthread->set_pthread_id(::pthread_self()); | |
948 | |
949 // initialize floating point control register | |
950 os::Linux::init_thread_fpu_state(); | |
951 | |
952 // Initial thread state is RUNNABLE | |
953 osthread->set_state(RUNNABLE); | |
954 | |
955 thread->set_osthread(osthread); | |
956 | |
957 if (UseNUMA) { | |
958 int lgrp_id = os::numa_get_group_id(); | |
959 if (lgrp_id != -1) { | |
960 thread->set_lgrp_id(lgrp_id); | |
961 } | |
962 } | |
963 | |
964 if (os::Linux::is_initial_thread()) { | |
965 // If current thread is initial thread, its stack is mapped on demand, | |
966 // see notes about MAP_GROWSDOWN. Here we try to force kernel to map | |
967 // the entire stack region to avoid SEGV in stack banging. | |
968 // It is also useful to get around the heap-stack-gap problem on SuSE | |
969 // kernel (see 4821821 for details). We first expand stack to the top | |
970 // of yellow zone, then enable stack yellow zone (order is significant, | |
971 // enabling yellow zone first will crash JVM on SuSE Linux), so there | |
972 // is no gap between the last two virtual memory regions. | |
973 | |
974 JavaThread *jt = (JavaThread *)thread; | |
975 address addr = jt->stack_yellow_zone_base(); | |
976 assert(addr != NULL, "initialization problem?"); | |
977 assert(jt->stack_available(addr) > 0, "stack guard should not be enabled"); | |
978 | |
979 osthread->set_expanding_stack(); | |
980 os::Linux::manually_expand_stack(jt, addr); | |
981 osthread->clear_expanding_stack(); | |
982 } | |
983 | |
984 // initialize signal mask for this thread | |
985 // and save the caller's signal mask | |
986 os::Linux::hotspot_sigmask(thread); | |
987 | |
988 return true; | |
989 } | |
990 | |
991 void os::pd_start_thread(Thread* thread) { | |
992 OSThread * osthread = thread->osthread(); | |
993 assert(osthread->get_state() != INITIALIZED, "just checking"); | |
994 Monitor* sync_with_child = osthread->startThread_lock(); | |
995 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
996 sync_with_child->notify(); | |
997 } | |
998 | |
999 // Free Linux resources related to the OSThread | |
1000 void os::free_thread(OSThread* osthread) { | |
1001 assert(osthread != NULL, "osthread not set"); | |
1002 | |
1003 if (Thread::current()->osthread() == osthread) { | |
1004 // Restore caller's signal mask | |
1005 sigset_t sigmask = osthread->caller_sigmask(); | |
1006 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); | |
1007 } | |
1008 | |
1009 delete osthread; | |
1010 } | |
1011 | |
1012 ////////////////////////////////////////////////////////////////////////////// | |
1013 // thread local storage | |
1014 | |
17845
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1015 // Restore the thread pointer if the destructor is called. This is in case |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1016 // someone from JNI code sets up a destructor with pthread_key_create to run |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1017 // detachCurrentThread on thread death. Unless we restore the thread pointer we |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1018 // will hang or crash. When detachCurrentThread is called the key will be set |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1019 // to null and we will not be called again. If detachCurrentThread is never |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1020 // called we could loop forever depending on the pthread implementation. |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1021 static void restore_thread_pointer(void* p) { |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1022 Thread* thread = (Thread*) p; |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1023 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1024 } |
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1025 |
0 | 1026 int os::allocate_thread_local_storage() { |
1027 pthread_key_t key; | |
17845
21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
kevinw
parents:
17830
diff
changeset
|
1028 int rslt = pthread_key_create(&key, restore_thread_pointer); |
0 | 1029 assert(rslt == 0, "cannot allocate thread local storage"); |
1030 return (int)key; | |
1031 } | |
1032 | |
1033 // Note: This is currently not used by VM, as we don't destroy TLS key | |
1034 // on VM exit. | |
1035 void os::free_thread_local_storage(int index) { | |
1036 int rslt = pthread_key_delete((pthread_key_t)index); | |
1037 assert(rslt == 0, "invalid index"); | |
1038 } | |
1039 | |
1040 void os::thread_local_storage_at_put(int index, void* value) { | |
1041 int rslt = pthread_setspecific((pthread_key_t)index, value); | |
1042 assert(rslt == 0, "pthread_setspecific failed"); | |
1043 } | |
1044 | |
1045 extern "C" Thread* get_thread() { | |
1046 return ThreadLocalStorage::thread(); | |
1047 } | |
1048 | |
1049 ////////////////////////////////////////////////////////////////////////////// | |
1050 // initial thread | |
1051 | |
1052 // Check if current thread is the initial thread, similar to Solaris thr_main. | |
1053 bool os::Linux::is_initial_thread(void) { | |
1054 char dummy; | |
1055 // If called before init complete, thread stack bottom will be null. | |
1056 // Can be called if fatal error occurs before initialization. | |
1057 if (initial_thread_stack_bottom() == NULL) return false; | |
1058 assert(initial_thread_stack_bottom() != NULL && | |
1059 initial_thread_stack_size() != 0, | |
1060 "os::init did not locate initial thread's stack region"); | |
1061 if ((address)&dummy >= initial_thread_stack_bottom() && | |
1062 (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size()) | |
1063 return true; | |
1064 else return false; | |
1065 } | |
1066 | |
1067 // Find the virtual memory area that contains addr | |
1068 static bool find_vma(address addr, address* vma_low, address* vma_high) { | |
1069 FILE *fp = fopen("/proc/self/maps", "r"); | |
1070 if (fp) { | |
1071 address low, high; | |
1072 while (!feof(fp)) { | |
1073 if (fscanf(fp, "%p-%p", &low, &high) == 2) { | |
1074 if (low <= addr && addr < high) { | |
1075 if (vma_low) *vma_low = low; | |
1076 if (vma_high) *vma_high = high; | |
1077 fclose (fp); | |
1078 return true; | |
1079 } | |
1080 } | |
1081 for (;;) { | |
1082 int ch = fgetc(fp); | |
1083 if (ch == EOF || ch == (int)'\n') break; | |
1084 } | |
1085 } | |
1086 fclose(fp); | |
1087 } | |
1088 return false; | |
1089 } | |
1090 | |
1091 // Locate initial thread stack. This special handling of initial thread stack | |
1092 // is needed because pthread_getattr_np() on most (all?) Linux distros returns | |
1093 // bogus value for initial thread. | |
1094 void os::Linux::capture_initial_stack(size_t max_size) { | |
1095 // stack size is the easy part, get it from RLIMIT_STACK | |
1096 size_t stack_size; | |
1097 struct rlimit rlim; | |
1098 getrlimit(RLIMIT_STACK, &rlim); | |
1099 stack_size = rlim.rlim_cur; | |
1100 | |
1101 // 6308388: a bug in ld.so will relocate its own .data section to the | |
1102 // lower end of primordial stack; reduce ulimit -s value a little bit | |
1103 // so we won't install guard page on ld.so's data section. | |
1104 stack_size -= 2 * page_size(); | |
1105 | |
1106 // 4441425: avoid crash with "unlimited" stack size on SuSE 7.1 or Redhat | |
1107 // 7.1, in both cases we will get 2G in return value. | |
1108 // 4466587: glibc 2.2.x compiled w/o "--enable-kernel=2.4.0" (RH 7.0, | |
1109 // SuSE 7.2, Debian) can not handle alternate signal stack correctly | |
1110 // for initial thread if its stack size exceeds 6M. Cap it at 2M, | |
1111 // in case other parts in glibc still assumes 2M max stack size. | |
1112 // FIXME: alt signal stack is gone, maybe we can relax this constraint? | |
1113 // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small | |
7994 | 1114 if (stack_size > 2 * K * K IA64_ONLY(*2)) |
1115 stack_size = 2 * K * K IA64_ONLY(*2); | |
0 | 1116 // Try to figure out where the stack base (top) is. This is harder. |
1117 // | |
1118 // When an application is started, glibc saves the initial stack pointer in | |
1119 // a global variable "__libc_stack_end", which is then used by system | |
1120 // libraries. __libc_stack_end should be pretty close to stack top. The | |
1121 // variable is available since the very early days. However, because it is | |
1122 // a private interface, it could disappear in the future. | |
1123 // | |
1124 // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar | |
1125 // to __libc_stack_end, it is very close to stack top, but isn't the real | |
1126 // stack top. Note that /proc may not exist if VM is running as a chroot | |
1127 // program, so reading /proc/<pid>/stat could fail. Also the contents of | |
1128 // /proc/<pid>/stat could change in the future (though unlikely). | |
1129 // | |
1130 // We try __libc_stack_end first. If that doesn't work, look for | |
1131 // /proc/<pid>/stat. If neither of them works, we use current stack pointer | |
1132 // as a hint, which should work well in most cases. | |
1133 | |
1134 uintptr_t stack_start; | |
1135 | |
1136 // try __libc_stack_end first | |
1137 uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end"); | |
1138 if (p && *p) { | |
1139 stack_start = *p; | |
1140 } else { | |
1141 // see if we can get the start_stack field from /proc/self/stat | |
1142 FILE *fp; | |
1143 int pid; | |
1144 char state; | |
1145 int ppid; | |
1146 int pgrp; | |
1147 int session; | |
1148 int nr; | |
1149 int tpgrp; | |
1150 unsigned long flags; | |
1151 unsigned long minflt; | |
1152 unsigned long cminflt; | |
1153 unsigned long majflt; | |
1154 unsigned long cmajflt; | |
1155 unsigned long utime; | |
1156 unsigned long stime; | |
1157 long cutime; | |
1158 long cstime; | |
1159 long prio; | |
1160 long nice; | |
1161 long junk; | |
1162 long it_real; | |
1163 uintptr_t start; | |
1164 uintptr_t vsize; | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1165 intptr_t rss; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1166 uintptr_t rsslim; |
0 | 1167 uintptr_t scodes; |
1168 uintptr_t ecode; | |
1169 int i; | |
1170 | |
1171 // Figure what the primordial thread stack base is. Code is inspired | |
1172 // by email from Hans Boehm. /proc/self/stat begins with current pid, | |
1173 // followed by command name surrounded by parentheses, state, etc. | |
1174 char stat[2048]; | |
1175 int statlen; | |
1176 | |
1177 fp = fopen("/proc/self/stat", "r"); | |
1178 if (fp) { | |
1179 statlen = fread(stat, 1, 2047, fp); | |
1180 stat[statlen] = '\0'; | |
1181 fclose(fp); | |
1182 | |
1183 // Skip pid and the command string. Note that we could be dealing with | |
1184 // weird command names, e.g. user could decide to rename java launcher | |
1185 // to "java 1.4.2 :)", then the stat file would look like | |
1186 // 1234 (java 1.4.2 :)) R ... ... | |
1187 // We don't really need to know the command string, just find the last | |
1188 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
1189 char * s = strrchr(stat, ')'); | |
1190 | |
1191 i = 0; | |
1192 if (s) { | |
1193 // Skip blank chars | |
1194 do s++; while (isspace(*s)); | |
1195 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1196 #define _UFM UINTX_FORMAT |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1197 #define _DFM INTX_FORMAT |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1198 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1199 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1200 /* 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1201 i = sscanf(s, "%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld " _UFM _UFM _DFM _UFM _UFM _UFM _UFM, |
0 | 1202 &state, /* 3 %c */ |
1203 &ppid, /* 4 %d */ | |
1204 &pgrp, /* 5 %d */ | |
1205 &session, /* 6 %d */ | |
1206 &nr, /* 7 %d */ | |
1207 &tpgrp, /* 8 %d */ | |
1208 &flags, /* 9 %lu */ | |
1209 &minflt, /* 10 %lu */ | |
1210 &cminflt, /* 11 %lu */ | |
1211 &majflt, /* 12 %lu */ | |
1212 &cmajflt, /* 13 %lu */ | |
1213 &utime, /* 14 %lu */ | |
1214 &stime, /* 15 %lu */ | |
1215 &cutime, /* 16 %ld */ | |
1216 &cstime, /* 17 %ld */ | |
1217 &prio, /* 18 %ld */ | |
1218 &nice, /* 19 %ld */ | |
1219 &junk, /* 20 %ld */ | |
1220 &it_real, /* 21 %ld */ | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1221 &start, /* 22 UINTX_FORMAT */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1222 &vsize, /* 23 UINTX_FORMAT */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1223 &rss, /* 24 INTX_FORMAT */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1224 &rsslim, /* 25 UINTX_FORMAT */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1225 &scodes, /* 26 UINTX_FORMAT */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1226 &ecode, /* 27 UINTX_FORMAT */ |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1227 &stack_start); /* 28 UINTX_FORMAT */ |
0 | 1228 } |
1229 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1230 #undef _UFM |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1231 #undef _DFM |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1232 |
0 | 1233 if (i != 28 - 2) { |
1234 assert(false, "Bad conversion from /proc/self/stat"); | |
1235 // product mode - assume we are the initial thread, good luck in the | |
1236 // embedded case. | |
1237 warning("Can't detect initial thread stack location - bad conversion"); | |
1238 stack_start = (uintptr_t) &rlim; | |
1239 } | |
1240 } else { | |
1241 // For some reason we can't open /proc/self/stat (for example, running on | |
1242 // FreeBSD with a Linux emulator, or inside chroot), this should work for | |
1243 // most cases, so don't abort: | |
1244 warning("Can't detect initial thread stack location - no /proc/self/stat"); | |
1245 stack_start = (uintptr_t) &rlim; | |
1246 } | |
1247 } | |
1248 | |
1249 // Now we have a pointer (stack_start) very close to the stack top, the | |
1250 // next thing to do is to figure out the exact location of stack top. We | |
1251 // can find out the virtual memory area that contains stack_start by | |
1252 // reading /proc/self/maps, it should be the last vma in /proc/self/maps, | |
1253 // and its upper limit is the real stack top. (again, this would fail if | |
1254 // running inside chroot, because /proc may not exist.) | |
1255 | |
1256 uintptr_t stack_top; | |
1257 address low, high; | |
1258 if (find_vma((address)stack_start, &low, &high)) { | |
1259 // success, "high" is the true stack top. (ignore "low", because initial | |
1260 // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.) | |
1261 stack_top = (uintptr_t)high; | |
1262 } else { | |
1263 // failed, likely because /proc/self/maps does not exist | |
1264 warning("Can't detect initial thread stack location - find_vma failed"); | |
1265 // best effort: stack_start is normally within a few pages below the real | |
1266 // stack top, use it as stack top, and reduce stack size so we won't put | |
1267 // guard page outside stack. | |
1268 stack_top = stack_start; | |
1269 stack_size -= 16 * page_size(); | |
1270 } | |
1271 | |
1272 // stack_top could be partially down the page so align it | |
1273 stack_top = align_size_up(stack_top, page_size()); | |
1274 | |
1275 if (max_size && stack_size > max_size) { | |
1276 _initial_thread_stack_size = max_size; | |
1277 } else { | |
1278 _initial_thread_stack_size = stack_size; | |
1279 } | |
1280 | |
1281 _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size()); | |
1282 _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size; | |
1283 } | |
1284 | |
1285 //////////////////////////////////////////////////////////////////////////////// | |
1286 // time support | |
1287 | |
1288 // Time since start-up in seconds to a fine granularity. | |
1289 // Used by VMSelfDestructTimer and the MemProfiler. | |
1290 double os::elapsedTime() { | |
1291 | |
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
1292 return ((double)os::elapsed_counter()) / os::elapsed_frequency(); // nanosecond resolution |
0 | 1293 } |
1294 | |
1295 jlong os::elapsed_counter() { | |
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
1296 return javaTimeNanos() - initial_time_count; |
0 | 1297 } |
1298 | |
1299 jlong os::elapsed_frequency() { | |
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
1300 return NANOSECS_PER_SEC; // nanosecond resolution |
0 | 1301 } |
1302 | |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1303 bool os::supports_vtime() { return true; } |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1304 bool os::enable_vtime() { return false; } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1305 bool os::vtime_enabled() { return false; } |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1306 |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1307 double os::elapsedVTime() { |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1308 struct rusage usage; |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1309 int retval = getrusage(RUSAGE_THREAD, &usage); |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1310 if (retval == 0) { |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1311 return (double) (usage.ru_utime.tv_sec + usage.ru_stime.tv_sec) + (double) (usage.ru_utime.tv_usec + usage.ru_stime.tv_usec) / (1000 * 1000); |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1312 } else { |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1313 // better than nothing, but not much |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1314 return elapsedTime(); |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10208
diff
changeset
|
1315 } |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1316 } |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1317 |
61 | 1318 jlong os::javaTimeMillis() { |
0 | 1319 timeval time; |
1320 int status = gettimeofday(&time, NULL); | |
1321 assert(status != -1, "linux error"); | |
1322 return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); | |
1323 } | |
1324 | |
1325 #ifndef CLOCK_MONOTONIC | |
1326 #define CLOCK_MONOTONIC (1) | |
1327 #endif | |
1328 | |
1329 void os::Linux::clock_init() { | |
1330 // we do dlopen's in this particular order due to bug in linux | |
1331 // dynamical loader (see 6348968) leading to crash on exit | |
1332 void* handle = dlopen("librt.so.1", RTLD_LAZY); | |
1333 if (handle == NULL) { | |
1334 handle = dlopen("librt.so", RTLD_LAZY); | |
1335 } | |
1336 | |
1337 if (handle) { | |
1338 int (*clock_getres_func)(clockid_t, struct timespec*) = | |
1339 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres"); | |
1340 int (*clock_gettime_func)(clockid_t, struct timespec*) = | |
1341 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime"); | |
1342 if (clock_getres_func && clock_gettime_func) { | |
1343 // See if monotonic clock is supported by the kernel. Note that some | |
1344 // early implementations simply return kernel jiffies (updated every | |
1345 // 1/100 or 1/1000 second). It would be bad to use such a low res clock | |
1346 // for nano time (though the monotonic property is still nice to have). | |
1347 // It's fixed in newer kernels, however clock_getres() still returns | |
1348 // 1/HZ. We check if clock_getres() works, but will ignore its reported | |
1349 // resolution for now. Hopefully as people move to new kernels, this | |
1350 // won't be a problem. | |
1351 struct timespec res; | |
1352 struct timespec tp; | |
1353 if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 && | |
1354 clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) { | |
1355 // yes, monotonic clock is supported | |
1356 _clock_gettime = clock_gettime_func; | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
1357 return; |
0 | 1358 } else { |
1359 // close librt if there is no monotonic clock | |
1360 dlclose(handle); | |
1361 } | |
1362 } | |
1363 } | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
1364 warning("No monotonic clock was available - timed services may " \ |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
1365 "be adversely affected if the time-of-day clock changes"); |
0 | 1366 } |
1367 | |
1368 #ifndef SYS_clock_getres | |
1369 | |
1370 #if defined(IA32) || defined(AMD64) | |
1371 #define SYS_clock_getres IA32_ONLY(266) AMD64_ONLY(229) | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1372 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
0 | 1373 #else |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1374 #warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time" |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1375 #define sys_clock_getres(x,y) -1 |
0 | 1376 #endif |
1377 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1378 #else |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1379 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
0 | 1380 #endif |
1381 | |
1382 void os::Linux::fast_thread_clock_init() { | |
1383 if (!UseLinuxPosixThreadCPUClocks) { | |
1384 return; | |
1385 } | |
1386 clockid_t clockid; | |
1387 struct timespec tp; | |
1388 int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) = | |
1389 (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid"); | |
1390 | |
1391 // Switch to using fast clocks for thread cpu time if | |
1392 // the sys_clock_getres() returns 0 error code. | |
1393 // Note, that some kernels may support the current thread | |
1394 // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks | |
1395 // returned by the pthread_getcpuclockid(). | |
1396 // If the fast Posix clocks are supported then the sys_clock_getres() | |
1397 // must return at least tp.tv_sec == 0 which means a resolution | |
1398 // better than 1 sec. This is extra check for reliability. | |
1399 | |
1400 if(pthread_getcpuclockid_func && | |
1401 pthread_getcpuclockid_func(_main_thread, &clockid) == 0 && | |
1402 sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) { | |
1403 | |
1404 _supports_fast_thread_cpu_time = true; | |
1405 _pthread_getcpuclockid = pthread_getcpuclockid_func; | |
1406 } | |
1407 } | |
1408 | |
1409 jlong os::javaTimeNanos() { | |
1410 if (Linux::supports_monotonic_clock()) { | |
1411 struct timespec tp; | |
1412 int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp); | |
1413 assert(status == 0, "gettime error"); | |
1414 jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); | |
1415 return result; | |
1416 } else { | |
1417 timeval time; | |
1418 int status = gettimeofday(&time, NULL); | |
1419 assert(status != -1, "linux error"); | |
1420 jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); | |
1421 return 1000 * usecs; | |
1422 } | |
1423 } | |
1424 | |
1425 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
1426 if (Linux::supports_monotonic_clock()) { | |
1427 info_ptr->max_value = ALL_64_BITS; | |
1428 | |
1429 // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past | |
1430 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
1431 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
1432 } else { | |
1433 // gettimeofday - based on time in seconds since the Epoch thus does not wrap | |
1434 info_ptr->max_value = ALL_64_BITS; | |
1435 | |
1436 // gettimeofday is a real time clock so it skips | |
1437 info_ptr->may_skip_backward = true; | |
1438 info_ptr->may_skip_forward = true; | |
1439 } | |
1440 | |
1441 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
1442 } | |
1443 | |
1444 // Return the real, user, and system times in seconds from an | |
1445 // arbitrary fixed point in the past. | |
1446 bool os::getTimesSecs(double* process_real_time, | |
1447 double* process_user_time, | |
1448 double* process_system_time) { | |
1449 struct tms ticks; | |
1450 clock_t real_ticks = times(&ticks); | |
1451 | |
1452 if (real_ticks == (clock_t) (-1)) { | |
1453 return false; | |
1454 } else { | |
1455 double ticks_per_second = (double) clock_tics_per_sec; | |
1456 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
1457 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
1458 *process_real_time = ((double) real_ticks) / ticks_per_second; | |
1459 | |
1460 return true; | |
1461 } | |
1462 } | |
1463 | |
1464 | |
1465 char * os::local_time_string(char *buf, size_t buflen) { | |
1466 struct tm t; | |
1467 time_t long_time; | |
1468 time(&long_time); | |
1469 localtime_r(&long_time, &t); | |
1470 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
1471 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
1472 t.tm_hour, t.tm_min, t.tm_sec); | |
1473 return buf; | |
1474 } | |
1475 | |
548
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1476 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1477 return localtime_r(clock, res); |
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1478 } |
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1479 |
0 | 1480 //////////////////////////////////////////////////////////////////////////////// |
1481 // runtime exit support | |
1482 | |
1483 // Note: os::shutdown() might be called very early during initialization, or | |
1484 // called from signal handler. Before adding something to os::shutdown(), make | |
1485 // sure it is async-safe and can handle partially initialized VM. | |
1486 void os::shutdown() { | |
1487 | |
1488 // allow PerfMemory to attempt cleanup of any persistent resources | |
1489 perfMemory_exit(); | |
1490 | |
1491 // needs to remove object in file system | |
1492 AttachListener::abort(); | |
1493 | |
1494 // flush buffered output, finish log files | |
1495 ostream_abort(); | |
1496 | |
1497 // Check for abort hook | |
1498 abort_hook_t abort_hook = Arguments::abort_hook(); | |
1499 if (abort_hook != NULL) { | |
1500 abort_hook(); | |
1501 } | |
1502 | |
1503 } | |
1504 | |
1505 // Note: os::abort() might be called very early during initialization, or | |
1506 // called from signal handler. Before adding something to os::abort(), make | |
1507 // sure it is async-safe and can handle partially initialized VM. | |
1508 void os::abort(bool dump_core) { | |
1509 os::shutdown(); | |
1510 if (dump_core) { | |
1511 #ifndef PRODUCT | |
1512 fdStream out(defaultStream::output_fd()); | |
1513 out.print_raw("Current thread is "); | |
1514 char buf[16]; | |
1515 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
1516 out.print_raw_cr(buf); | |
1517 out.print_raw_cr("Dumping core ..."); | |
1518 #endif | |
1519 ::abort(); // dump core | |
1520 } | |
1521 | |
1522 ::exit(1); | |
1523 } | |
1524 | |
1525 // Die immediately, no exit hook, no abort hook, no cleanup. | |
1526 void os::die() { | |
1527 // _exit() on LinuxThreads only kills current thread | |
1528 ::abort(); | |
1529 } | |
1530 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1531 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1532 // This method is a copy of JDK's sysGetLastErrorString |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1533 // from src/solaris/hpi/src/system_md.c |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1534 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1535 size_t os::lasterror(char *buf, size_t len) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1536 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1537 if (errno == 0) return 0; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1538 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1539 const char *s = ::strerror(errno); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1540 size_t n = ::strlen(s); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1541 if (n >= len) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1542 n = len - 1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1543 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1544 ::strncpy(buf, s, n); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1545 buf[n] = '\0'; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1546 return n; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1547 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1548 |
0 | 1549 intx os::current_thread_id() { return (intx)pthread_self(); } |
1550 int os::current_process_id() { | |
1551 | |
1552 // Under the old linux thread library, linux gives each thread | |
1553 // its own process id. Because of this each thread will return | |
1554 // a different pid if this method were to return the result | |
1555 // of getpid(2). Linux provides no api that returns the pid | |
1556 // of the launcher thread for the vm. This implementation | |
1557 // returns a unique pid, the pid of the launcher thread | |
1558 // that starts the vm 'process'. | |
1559 | |
1560 // Under the NPTL, getpid() returns the same pid as the | |
1561 // launcher thread rather than a unique pid per thread. | |
1562 // Use gettid() if you want the old pre NPTL behaviour. | |
1563 | |
1564 // if you are looking for the result of a call to getpid() that | |
1565 // returns a unique pid for the calling thread, then look at the | |
1566 // OSThread::thread_id() method in osThread_linux.hpp file | |
1567 | |
1568 return (int)(_initial_pid ? _initial_pid : getpid()); | |
1569 } | |
1570 | |
1571 // DLL functions | |
1572 | |
1573 const char* os::dll_file_extension() { return ".so"; } | |
1574 | |
2130
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents:
2033
diff
changeset
|
1575 // This must be hard coded because it's the system's temporary |
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents:
2033
diff
changeset
|
1576 // directory not the java application's temp directory, ala java.io.tmpdir. |
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents:
2033
diff
changeset
|
1577 const char* os::get_temp_directory() { return "/tmp"; } |
0 | 1578 |
691 | 1579 static bool file_exists(const char* filename) { |
1580 struct stat statbuf; | |
1581 if (filename == NULL || strlen(filename) == 0) { | |
1582 return false; | |
1583 } | |
1584 return os::stat(filename, &statbuf) == 0; | |
1585 } | |
1586 | |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1587 bool os::dll_build_name(char* buffer, size_t buflen, |
691 | 1588 const char* pname, const char* fname) { |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1589 bool retval = false; |
691 | 1590 // Copied from libhpi |
242 | 1591 const size_t pnamelen = pname ? strlen(pname) : 0; |
1592 | |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1593 // Return error on buffer overflow. |
242 | 1594 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1595 return retval; |
242 | 1596 } |
1597 | |
1598 if (pnamelen == 0) { | |
691 | 1599 snprintf(buffer, buflen, "lib%s.so", fname); |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1600 retval = true; |
691 | 1601 } else if (strchr(pname, *os::path_separator()) != NULL) { |
1602 int n; | |
1603 char** pelements = split_path(pname, &n); | |
9059
17bf4d428955
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
8812
diff
changeset
|
1604 if (pelements == NULL) { |
9062 | 1605 return false; |
9059
17bf4d428955
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
8812
diff
changeset
|
1606 } |
691 | 1607 for (int i = 0 ; i < n ; i++) { |
1608 // Really shouldn't be NULL, but check can't hurt | |
1609 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
1610 continue; // skip the empty path values | |
1611 } | |
1612 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
1613 if (file_exists(buffer)) { | |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1614 retval = true; |
691 | 1615 break; |
1616 } | |
1617 } | |
1618 // release the storage | |
1619 for (int i = 0 ; i < n ; i++) { | |
1620 if (pelements[i] != NULL) { | |
6197 | 1621 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
691 | 1622 } |
1623 } | |
1624 if (pelements != NULL) { | |
6197 | 1625 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
691 | 1626 } |
242 | 1627 } else { |
691 | 1628 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1629 retval = true; |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1630 } |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1631 return retval; |
242 | 1632 } |
1633 | |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
1634 // check if addr is inside libjvm.so |
0 | 1635 bool os::address_is_in_vm(address addr) { |
1636 static address libjvm_base_addr; | |
1637 Dl_info dlinfo; | |
1638 | |
1639 if (libjvm_base_addr == NULL) { | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1640 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1641 libjvm_base_addr = (address)dlinfo.dli_fbase; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1642 } |
0 | 1643 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
1644 } | |
1645 | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1646 if (dladdr((void *)addr, &dlinfo) != 0) { |
0 | 1647 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
1648 } | |
1649 | |
1650 return false; | |
1651 } | |
1652 | |
1653 bool os::dll_address_to_function_name(address addr, char *buf, | |
1654 int buflen, int *offset) { | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1655 // buf is not optional, but offset is optional |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1656 assert(buf != NULL, "sanity check"); |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1657 |
0 | 1658 Dl_info dlinfo; |
1659 | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1660 if (dladdr((void*)addr, &dlinfo) != 0) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1661 // see if we have a matching symbol |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1662 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1663 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1664 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1665 } |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1666 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1667 return true; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1668 } |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1669 // no matching symbol so try for just file info |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1670 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1671 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1672 buf, buflen, offset, dlinfo.dli_fname)) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1673 return true; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1674 } |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1675 } |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1676 } |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1677 |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1678 buf[0] = '\0'; |
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1679 if (offset != NULL) *offset = -1; |
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1680 return false; |
0 | 1681 } |
1682 | |
1683 struct _address_to_library_name { | |
1684 address addr; // input : memory address | |
1685 size_t buflen; // size of fname | |
1686 char* fname; // output: library name | |
1687 address base; // library base addr | |
1688 }; | |
1689 | |
1690 static int address_to_library_name_callback(struct dl_phdr_info *info, | |
1691 size_t size, void *data) { | |
1692 int i; | |
1693 bool found = false; | |
1694 address libbase = NULL; | |
1695 struct _address_to_library_name * d = (struct _address_to_library_name *)data; | |
1696 | |
1697 // iterate through all loadable segments | |
1698 for (i = 0; i < info->dlpi_phnum; i++) { | |
1699 address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr); | |
1700 if (info->dlpi_phdr[i].p_type == PT_LOAD) { | |
1701 // base address of a library is the lowest address of its loaded | |
1702 // segments. | |
1703 if (libbase == NULL || libbase > segbase) { | |
1704 libbase = segbase; | |
1705 } | |
1706 // see if 'addr' is within current segment | |
1707 if (segbase <= d->addr && | |
1708 d->addr < segbase + info->dlpi_phdr[i].p_memsz) { | |
1709 found = true; | |
1710 } | |
1711 } | |
1712 } | |
1713 | |
1714 // dlpi_name is NULL or empty if the ELF file is executable, return 0 | |
1715 // so dll_address_to_library_name() can fall through to use dladdr() which | |
1716 // can figure out executable name from argv[0]. | |
1717 if (found && info->dlpi_name && info->dlpi_name[0]) { | |
1718 d->base = libbase; | |
1719 if (d->fname) { | |
1720 jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name); | |
1721 } | |
1722 return 1; | |
1723 } | |
1724 return 0; | |
1725 } | |
1726 | |
1727 bool os::dll_address_to_library_name(address addr, char* buf, | |
1728 int buflen, int* offset) { | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1729 // buf is not optional, but offset is optional |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1730 assert(buf != NULL, "sanity check"); |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1731 |
0 | 1732 Dl_info dlinfo; |
1733 struct _address_to_library_name data; | |
1734 | |
1735 // There is a bug in old glibc dladdr() implementation that it could resolve | |
1736 // to wrong library name if the .so file has a base address != NULL. Here | |
1737 // we iterate through the program headers of all loaded libraries to find | |
1738 // out which library 'addr' really belongs to. This workaround can be | |
1739 // removed once the minimum requirement for glibc is moved to 2.3.x. | |
1740 data.addr = addr; | |
1741 data.fname = buf; | |
1742 data.buflen = buflen; | |
1743 data.base = NULL; | |
1744 int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data); | |
1745 | |
1746 if (rslt) { | |
1747 // buf already contains library name | |
1748 if (offset) *offset = addr - data.base; | |
1749 return true; | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1750 } |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1751 if (dladdr((void*)addr, &dlinfo) != 0) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1752 if (dlinfo.dli_fname != NULL) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1753 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1754 } |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1755 if (dlinfo.dli_fbase != NULL && offset != NULL) { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1756 *offset = addr - (address)dlinfo.dli_fbase; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1757 } |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1758 return true; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1759 } |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1760 |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1761 buf[0] = '\0'; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1762 if (offset) *offset = -1; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1763 return false; |
0 | 1764 } |
1765 | |
1766 // Loads .dll/.so and | |
1767 // in case of error it checks if .dll/.so was built for the | |
1768 // same architecture as Hotspot is running on | |
1769 | |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1770 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1771 // Remember the stack's state. The Linux dynamic linker will change |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1772 // the stack to 'executable' at most once, so we must safepoint only once. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1773 bool os::Linux::_stack_is_executable = false; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1774 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1775 // VM operation that loads a library. This is necessary if stack protection |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1776 // of the Java stacks can be lost during loading the library. If we |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1777 // do not stop the Java threads, they can stack overflow before the stacks |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1778 // are protected again. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1779 class VM_LinuxDllLoad: public VM_Operation { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1780 private: |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1781 const char *_filename; |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1782 char *_ebuf; |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1783 int _ebuflen; |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1784 void *_lib; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1785 public: |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1786 VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) : |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1787 _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {} |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1788 VMOp_Type type() const { return VMOp_LinuxDllLoad; } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1789 void doit() { |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1790 _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen); |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1791 os::Linux::_stack_is_executable = true; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1792 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1793 void* loaded_library() { return _lib; } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1794 }; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1795 |
0 | 1796 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
1797 { | |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1798 void * result = NULL; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1799 bool load_attempted = false; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1800 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1801 // Check whether the library to load might change execution rights |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1802 // of the stack. If they are changed, the protection of the stack |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1803 // guard pages will be lost. We need a safepoint to fix this. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1804 // |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1805 // See Linux man page execstack(8) for more info. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1806 if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1807 ElfFile ef(filename); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1808 if (!ef.specifies_noexecstack()) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1809 if (!is_init_completed()) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1810 os::Linux::_stack_is_executable = true; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1811 // This is OK - No Java threads have been created yet, and hence no |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1812 // stack guard pages to fix. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1813 // |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1814 // This should happen only when you are building JDK7 using a very |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1815 // old version of JDK6 (e.g., with JPRT) and running test_gamma. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1816 // |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1817 // Dynamic loader will make all stacks executable after |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1818 // this function returns, and will not do that again. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1819 assert(Threads::first() == NULL, "no Java threads should exist yet."); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1820 } else { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1821 warning("You have loaded library %s which might have disabled stack guard. " |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1822 "The VM will try to fix the stack guard now.\n" |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1823 "It's highly recommended that you fix the library with " |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1824 "'execstack -c <libfile>', or link it with '-z noexecstack'.", |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1825 filename); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1826 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1827 assert(Thread::current()->is_Java_thread(), "must be Java thread"); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1828 JavaThread *jt = JavaThread::current(); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1829 if (jt->thread_state() != _thread_in_native) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1830 // This happens when a compiler thread tries to load a hsdis-<arch>.so file |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1831 // that requires ExecStack. Cannot enter safe point. Let's give up. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1832 warning("Unable to fix stack guard. Giving up."); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1833 } else { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1834 if (!LoadExecStackDllInVMThread) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1835 // This is for the case where the DLL has an static |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1836 // constructor function that executes JNI code. We cannot |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1837 // load such DLLs in the VMThread. |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1838 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1839 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1840 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1841 ThreadInVMfromNative tiv(jt); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1842 debug_only(VMNativeEntryWrapper vew;) |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1843 |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1844 VM_LinuxDllLoad op(filename, ebuf, ebuflen); |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1845 VMThread::execute(&op); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1846 if (LoadExecStackDllInVMThread) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1847 result = op.loaded_library(); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1848 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1849 load_attempted = true; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1850 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1851 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1852 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1853 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1854 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1855 if (!load_attempted) { |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1856 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1857 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1858 |
0 | 1859 if (result != NULL) { |
1860 // Successful loading | |
1861 return result; | |
1862 } | |
1863 | |
1864 Elf32_Ehdr elf_head; | |
1865 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
1866 char* diag_msg_buf=ebuf+strlen(ebuf); | |
1867 | |
1868 if (diag_msg_max_length==0) { | |
1869 // No more space in ebuf for additional diagnostics message | |
1870 return NULL; | |
1871 } | |
1872 | |
1873 | |
1874 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
1875 | |
1876 if (file_descriptor < 0) { | |
1877 // Can't open library, report dlerror() message | |
1878 return NULL; | |
1879 } | |
1880 | |
1881 bool failed_to_read_elf_head= | |
1882 (sizeof(elf_head)!= | |
1883 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
1884 | |
1885 ::close(file_descriptor); | |
1886 if (failed_to_read_elf_head) { | |
1887 // file i/o error - report dlerror() msg | |
1888 return NULL; | |
1889 } | |
1890 | |
1891 typedef struct { | |
1892 Elf32_Half code; // Actual value as defined in elf.h | |
1893 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
1894 char elf_class; // 32 or 64 bit | |
1895 char endianess; // MSB or LSB | |
1896 char* name; // String representation | |
1897 } arch_t; | |
1898 | |
1899 #ifndef EM_486 | |
1900 #define EM_486 6 /* Intel 80486 */ | |
1901 #endif | |
1902 | |
1903 static const arch_t arch_array[]={ | |
1904 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
1905 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
1906 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
1907 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
1908 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
1909 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
1910 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
1911 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
17830
56e7f5560e60
8036767: PPC64: Support for little endian execution model
kvn
parents:
17810
diff
changeset
|
1912 #if defined(VM_LITTLE_ENDIAN) |
56e7f5560e60
8036767: PPC64: Support for little endian execution model
kvn
parents:
17810
diff
changeset
|
1913 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2LSB, (char*)"Power PC 64"}, |
56e7f5560e60
8036767: PPC64: Support for little endian execution model
kvn
parents:
17810
diff
changeset
|
1914 #else |
1010 | 1915 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
17830
56e7f5560e60
8036767: PPC64: Support for little endian execution model
kvn
parents:
17810
diff
changeset
|
1916 #endif |
1010 | 1917 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, |
1918 {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, | |
1919 {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, | |
1920 {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, | |
1921 {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, | |
1922 {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, | |
1923 {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} | |
0 | 1924 }; |
1925 | |
1926 #if (defined IA32) | |
1927 static Elf32_Half running_arch_code=EM_386; | |
1928 #elif (defined AMD64) | |
1929 static Elf32_Half running_arch_code=EM_X86_64; | |
1930 #elif (defined IA64) | |
1931 static Elf32_Half running_arch_code=EM_IA_64; | |
1932 #elif (defined __sparc) && (defined _LP64) | |
1933 static Elf32_Half running_arch_code=EM_SPARCV9; | |
1934 #elif (defined __sparc) && (!defined _LP64) | |
1935 static Elf32_Half running_arch_code=EM_SPARC; | |
1936 #elif (defined __powerpc64__) | |
1937 static Elf32_Half running_arch_code=EM_PPC64; | |
1938 #elif (defined __powerpc__) | |
1939 static Elf32_Half running_arch_code=EM_PPC; | |
1010 | 1940 #elif (defined ARM) |
1941 static Elf32_Half running_arch_code=EM_ARM; | |
1942 #elif (defined S390) | |
1943 static Elf32_Half running_arch_code=EM_S390; | |
1944 #elif (defined ALPHA) | |
1945 static Elf32_Half running_arch_code=EM_ALPHA; | |
1946 #elif (defined MIPSEL) | |
1947 static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; | |
1948 #elif (defined PARISC) | |
1949 static Elf32_Half running_arch_code=EM_PARISC; | |
1950 #elif (defined MIPS) | |
1951 static Elf32_Half running_arch_code=EM_MIPS; | |
1952 #elif (defined M68K) | |
1953 static Elf32_Half running_arch_code=EM_68K; | |
0 | 1954 #else |
1955 #error Method os::dll_load requires that one of following is defined:\ | |
1010 | 1956 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
0 | 1957 #endif |
1958 | |
1959 // Identify compatability class for VM's architecture and library's architecture | |
1960 // Obtain string descriptions for architectures | |
1961 | |
1962 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
1963 int running_arch_index=-1; | |
1964 | |
1965 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
1966 if (running_arch_code == arch_array[i].code) { | |
1967 running_arch_index = i; | |
1968 } | |
1969 if (lib_arch.code == arch_array[i].code) { | |
1970 lib_arch.compat_class = arch_array[i].compat_class; | |
1971 lib_arch.name = arch_array[i].name; | |
1972 } | |
1973 } | |
1974 | |
1975 assert(running_arch_index != -1, | |
1976 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
1977 if (running_arch_index == -1) { | |
1978 // Even though running architecture detection failed | |
1979 // we may still continue with reporting dlerror() message | |
1980 return NULL; | |
1981 } | |
1982 | |
1983 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
1984 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
1985 return NULL; | |
1986 } | |
1987 | |
1010 | 1988 #ifndef S390 |
0 | 1989 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
1990 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
1991 return NULL; | |
1992 } | |
1010 | 1993 #endif // !S390 |
0 | 1994 |
1995 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
1996 if ( lib_arch.name!=NULL ) { | |
1997 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
1998 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
1999 lib_arch.name, arch_array[running_arch_index].name); | |
2000 } else { | |
2001 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
2002 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
2003 lib_arch.code, | |
2004 arch_array[running_arch_index].name); | |
2005 } | |
2006 } | |
2007 | |
2008 return NULL; | |
2009 } | |
2010 | |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2011 void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) { |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2012 void * result = ::dlopen(filename, RTLD_LAZY); |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2013 if (result == NULL) { |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2014 ::strncpy(ebuf, ::dlerror(), ebuflen - 1); |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2015 ebuf[ebuflen-1] = '\0'; |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2016 } |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2017 return result; |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2018 } |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2019 |
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2020 void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) { |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2021 void * result = NULL; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2022 if (LoadExecStackDllInVMThread) { |
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2023 result = dlopen_helper(filename, ebuf, ebuflen); |
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2024 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2025 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2026 // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2027 // library that requires an executable stack, or which does not have this |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2028 // stack attribute set, dlopen changes the stack attribute to executable. The |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2029 // read protection of the guard pages gets lost. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2030 // |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2031 // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2032 // may have been queued at the same time. |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2033 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2034 if (!_stack_is_executable) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2035 JavaThread *jt = Threads::first(); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2036 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2037 while (jt) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2038 if (!jt->stack_guard_zone_unused() && // Stack not yet fully initialized |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2039 jt->stack_yellow_zone_enabled()) { // No pending stack overflow exceptions |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2040 if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(), |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2041 jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) { |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2042 warning("Attempt to reguard stack yellow zone failed."); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2043 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2044 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2045 jt = jt->next(); |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2046 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2047 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2048 |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2049 return result; |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2050 } |
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2051 |
242 | 2052 /* |
2053 * glibc-2.0 libdl is not MT safe. If you are building with any glibc, | |
2054 * chances are you might want to run the generated bits against glibc-2.0 | |
2055 * libdl.so, so always use locking for any version of glibc. | |
2056 */ | |
2057 void* os::dll_lookup(void* handle, const char* name) { | |
2058 pthread_mutex_lock(&dl_mutex); | |
2059 void* res = dlsym(handle, name); | |
2060 pthread_mutex_unlock(&dl_mutex); | |
2061 return res; | |
2062 } | |
0 | 2063 |
17684
d1621038becf
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
sla
parents:
12997
diff
changeset
|
2064 void* os::get_default_process_handle() { |
d1621038becf
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
sla
parents:
12997
diff
changeset
|
2065 return (void*)::dlopen(NULL, RTLD_LAZY); |
d1621038becf
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
sla
parents:
12997
diff
changeset
|
2066 } |
0 | 2067 |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2068 static bool _print_ascii_file(const char* filename, outputStream* st) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2069 int fd = ::open(filename, O_RDONLY); |
0 | 2070 if (fd == -1) { |
2071 return false; | |
2072 } | |
2073 | |
2074 char buf[32]; | |
2075 int bytes; | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2076 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
0 | 2077 st->print_raw(buf, bytes); |
2078 } | |
2079 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2080 ::close(fd); |
0 | 2081 |
2082 return true; | |
2083 } | |
2084 | |
2085 void os::print_dll_info(outputStream *st) { | |
2086 st->print_cr("Dynamic libraries:"); | |
2087 | |
2088 char fname[32]; | |
2089 pid_t pid = os::Linux::gettid(); | |
2090 | |
2091 jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid); | |
2092 | |
2093 if (!_print_ascii_file(fname, st)) { | |
2094 st->print("Can not get library information for pid = %d\n", pid); | |
2095 } | |
2096 } | |
2097 | |
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2098 void os::print_os_info_brief(outputStream* st) { |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2099 os::Linux::print_distro_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2100 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2101 os::Posix::print_uname_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2102 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2103 os::Linux::print_libversion_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2104 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2105 } |
0 | 2106 |
2107 void os::print_os_info(outputStream* st) { | |
2108 st->print("OS:"); | |
2109 | |
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2110 os::Linux::print_distro_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2111 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2112 os::Posix::print_uname_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2113 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2114 // Print warning if unsafe chroot environment detected |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2115 if (unsafe_chroot_detected) { |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2116 st->print("WARNING!! "); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
2117 st->print_cr("%s", unstable_chroot_error); |
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2118 } |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2119 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2120 os::Linux::print_libversion_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2121 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2122 os::Posix::print_rlimit_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2123 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2124 os::Posix::print_load_average(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2125 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2126 os::Linux::print_full_memory_info(st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2127 } |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2128 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2129 // Try to identify popular distros. |
12212
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2130 // Most Linux distributions have a /etc/XXX-release file, which contains |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2131 // the OS version string. Newer Linux distributions have a /etc/lsb-release |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2132 // file that also contains the OS version string. Some have more than one |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2133 // /etc/XXX-release file (e.g. Mandrake has both /etc/mandrake-release and |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2134 // /etc/redhat-release.), so the order is important. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2135 // Any Linux that is based on Redhat (i.e. Oracle, Mandrake, Sun JDS...) have |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2136 // their own specific XXX-release file as well as a redhat-release file. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2137 // Because of this the XXX-release file needs to be searched for before the |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2138 // redhat-release file. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2139 // Since Red Hat has a lsb-release file that is not very descriptive the |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2140 // search for redhat-release needs to be before lsb-release. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2141 // Since the lsb-release file is the new standard it needs to be searched |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2142 // before the older style release files. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2143 // Searching system-release (Red Hat) and os-release (other Linuxes) are a |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2144 // next to last resort. The os-release file is a new standard that contains |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2145 // distribution information and the system-release file seems to be an old |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2146 // standard that has been replaced by the lsb-release and os-release files. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2147 // Searching for the debian_version file is the last resort. It contains |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2148 // an informative string like "6.0.6" or "wheezy/sid". Because of this |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2149 // "Debian " is printed before the contents of the debian_version file. |
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2150 void os::Linux::print_distro_info(outputStream* st) { |
12212
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2151 if (!_print_ascii_file("/etc/oracle-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2152 !_print_ascii_file("/etc/mandriva-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2153 !_print_ascii_file("/etc/mandrake-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2154 !_print_ascii_file("/etc/sun-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2155 !_print_ascii_file("/etc/redhat-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2156 !_print_ascii_file("/etc/lsb-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2157 !_print_ascii_file("/etc/SuSE-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2158 !_print_ascii_file("/etc/turbolinux-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2159 !_print_ascii_file("/etc/gentoo-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2160 !_print_ascii_file("/etc/ltib-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2161 !_print_ascii_file("/etc/angstrom-version", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2162 !_print_ascii_file("/etc/system-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2163 !_print_ascii_file("/etc/os-release", st)) { |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2164 |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2165 if (file_exists("/etc/debian_version")) { |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2166 st->print("Debian "); |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2167 _print_ascii_file("/etc/debian_version", st); |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2168 } else { |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2169 st->print("Linux"); |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2170 } |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2171 } |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2172 st->cr(); |
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2173 } |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2174 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2175 void os::Linux::print_libversion_info(outputStream* st) { |
0 | 2176 // libc, pthread |
2177 st->print("libc:"); | |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
2178 st->print("%s ", os::Linux::glibc_version()); |
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
2179 st->print("%s ", os::Linux::libpthread_version()); |
0 | 2180 if (os::Linux::is_LinuxThreads()) { |
2181 st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed"); | |
2182 } | |
2183 st->cr(); | |
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2184 } |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2185 |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2186 void os::Linux::print_full_memory_info(outputStream* st) { |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2187 st->print("\n/proc/meminfo:\n"); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2188 _print_ascii_file("/proc/meminfo", st); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2189 st->cr(); |
3800
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2190 } |
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2191 |
0 | 2192 void os::print_memory_info(outputStream* st) { |
2193 | |
2194 st->print("Memory:"); | |
2195 st->print(" %dk page", os::vm_page_size()>>10); | |
2196 | |
2197 // values in struct sysinfo are "unsigned long" | |
2198 struct sysinfo si; | |
2199 sysinfo(&si); | |
2200 | |
2201 st->print(", physical " UINT64_FORMAT "k", | |
2202 os::physical_memory() >> 10); | |
2203 st->print("(" UINT64_FORMAT "k free)", | |
2204 os::available_memory() >> 10); | |
2205 st->print(", swap " UINT64_FORMAT "k", | |
2206 ((jlong)si.totalswap * si.mem_unit) >> 10); | |
2207 st->print("(" UINT64_FORMAT "k free)", | |
2208 ((jlong)si.freeswap * si.mem_unit) >> 10); | |
2209 st->cr(); | |
2210 } | |
2211 | |
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2212 void os::pd_print_cpu_info(outputStream* st) { |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2213 st->print("\n/proc/cpuinfo:\n"); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2214 if (!_print_ascii_file("/proc/cpuinfo", st)) { |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2215 st->print(" <Not Available>"); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2216 } |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2217 st->cr(); |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2218 } |
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2219 |
0 | 2220 void os::print_siginfo(outputStream* st, void* siginfo) { |
14410 | 2221 const siginfo_t* si = (const siginfo_t*)siginfo; |
2222 | |
2223 os::Posix::print_siginfo_brief(st, si); | |
20375
6e0cb14ce59b
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
20360
diff
changeset
|
2224 #if INCLUDE_CDS |
14410 | 2225 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && |
0 | 2226 UseSharedSpaces) { |
2227 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
2228 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
2229 st->print("\n\nError accessing class data sharing archive." \ | |
2230 " Mapped file inaccessible during execution, " \ | |
2231 " possible disk/network problem."); | |
2232 } | |
2233 } | |
20375
6e0cb14ce59b
8046070: Class Data Sharing clean up and refactoring
iklam
parents:
20360
diff
changeset
|
2234 #endif |
0 | 2235 st->cr(); |
2236 } | |
2237 | |
2238 | |
2239 static void print_signal_handler(outputStream* st, int sig, | |
2240 char* buf, size_t buflen); | |
2241 | |
2242 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
2243 st->print_cr("Signal Handlers:"); | |
2244 print_signal_handler(st, SIGSEGV, buf, buflen); | |
2245 print_signal_handler(st, SIGBUS , buf, buflen); | |
2246 print_signal_handler(st, SIGFPE , buf, buflen); | |
2247 print_signal_handler(st, SIGPIPE, buf, buflen); | |
2248 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
2249 print_signal_handler(st, SIGILL , buf, buflen); | |
2250 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
2251 print_signal_handler(st, SR_signum, buf, buflen); | |
2252 print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); | |
2253 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
2254 print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); | |
2255 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
2256 #if defined(PPC64) |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
2257 print_signal_handler(st, SIGTRAP, buf, buflen); |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
2258 #endif |
0 | 2259 } |
2260 | |
2261 static char saved_jvm_path[MAXPATHLEN] = {0}; | |
2262 | |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2263 // Find the full path to the current module, libjvm.so |
1642 | 2264 void os::jvm_path(char *buf, jint buflen) { |
0 | 2265 // Error checking. |
1642 | 2266 if (buflen < MAXPATHLEN) { |
0 | 2267 assert(false, "must use a large-enough buffer"); |
2268 buf[0] = '\0'; | |
2269 return; | |
2270 } | |
2271 // Lazy resolve the path to current module. | |
2272 if (saved_jvm_path[0] != 0) { | |
2273 strcpy(buf, saved_jvm_path); | |
2274 return; | |
2275 } | |
2276 | |
2277 char dli_fname[MAXPATHLEN]; | |
2278 bool ret = dll_address_to_library_name( | |
2279 CAST_FROM_FN_PTR(address, os::jvm_path), | |
2280 dli_fname, sizeof(dli_fname), NULL); | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2281 assert(ret, "cannot locate libjvm"); |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2282 char *rp = NULL; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2283 if (ret && dli_fname[0] != '\0') { |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2284 rp = realpath(dli_fname, buf); |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2285 } |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2286 if (rp == NULL) |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2287 return; |
0 | 2288 |
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
2204
diff
changeset
|
2289 if (Arguments::created_by_gamma_launcher()) { |
0 | 2290 // Support for the gamma launcher. Typical value for buf is |
2291 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
2292 // the right place in the string, then assume we are installed in a JDK and | |
2293 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
2294 // up the path so it looks like libjvm.so is installed there (append a | |
2295 // fake suffix hotspot/libjvm.so). | |
2296 const char *p = buf + strlen(buf) - 1; | |
2297 for (int count = 0; p > buf && count < 5; ++count) { | |
2298 for (--p; p > buf && *p != '/'; --p) | |
2299 /* empty */ ; | |
2300 } | |
2301 | |
2302 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
2303 // Look for JAVA_HOME in the environment. | |
2304 char* java_home_var = ::getenv("JAVA_HOME"); | |
2305 if (java_home_var != NULL && java_home_var[0] != 0) { | |
1642 | 2306 char* jrelib_p; |
2307 int len; | |
2308 | |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2309 // Check the current module name "libjvm.so". |
0 | 2310 p = strrchr(buf, '/'); |
2311 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
2312 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2313 rp = realpath(java_home_var, buf); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2314 if (rp == NULL) |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2315 return; |
1642 | 2316 |
2317 // determine if this is a legacy image or modules image | |
2318 // modules image doesn't have "jre" subdirectory | |
2319 len = strlen(buf); | |
17567 | 2320 assert(len < buflen, "Ran out of buffer room"); |
1642 | 2321 jrelib_p = buf + len; |
2322 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); | |
2323 if (0 != access(buf, F_OK)) { | |
2324 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); | |
2325 } | |
2326 | |
0 | 2327 if (0 == access(buf, F_OK)) { |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2328 // Use current module name "libjvm.so" |
1642 | 2329 len = strlen(buf); |
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2330 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); |
0 | 2331 } else { |
2332 // Go back to path of .so | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2333 rp = realpath(dli_fname, buf); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2334 if (rp == NULL) |
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2335 return; |
0 | 2336 } |
2337 } | |
2338 } | |
2339 } | |
2340 | |
17567 | 2341 strncpy(saved_jvm_path, buf, MAXPATHLEN); |
0 | 2342 } |
2343 | |
2344 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
2345 // no prefix required, not even "_" | |
2346 } | |
2347 | |
2348 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
2349 // no suffix required | |
2350 } | |
2351 | |
2352 //////////////////////////////////////////////////////////////////////////////// | |
2353 // sun.misc.Signal support | |
2354 | |
2355 static volatile jint sigint_count = 0; | |
2356 | |
2357 static void | |
2358 UserHandler(int sig, void *siginfo, void *context) { | |
2359 // 4511530 - sem_post is serialized and handled by the manager thread. When | |
2360 // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We | |
2361 // don't want to flood the manager thread with sem_post requests. | |
2362 if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) | |
2363 return; | |
2364 | |
2365 // Ctrl-C is pressed during error reporting, likely because the error | |
2366 // handler fails to abort. Let VM die immediately. | |
2367 if (sig == SIGINT && is_error_reported()) { | |
2368 os::die(); | |
2369 } | |
2370 | |
2371 os::signal_notify(sig); | |
2372 } | |
2373 | |
2374 void* os::user_handler() { | |
2375 return CAST_FROM_FN_PTR(void*, UserHandler); | |
2376 } | |
2377 | |
10405 | 2378 class Semaphore : public StackObj { |
2379 public: | |
2380 Semaphore(); | |
2381 ~Semaphore(); | |
2382 void signal(); | |
2383 void wait(); | |
2384 bool trywait(); | |
2385 bool timedwait(unsigned int sec, int nsec); | |
2386 private: | |
2387 sem_t _semaphore; | |
2388 }; | |
2389 | |
2390 Semaphore::Semaphore() { | |
2391 sem_init(&_semaphore, 0, 0); | |
2392 } | |
2393 | |
2394 Semaphore::~Semaphore() { | |
2395 sem_destroy(&_semaphore); | |
2396 } | |
2397 | |
2398 void Semaphore::signal() { | |
2399 sem_post(&_semaphore); | |
2400 } | |
2401 | |
2402 void Semaphore::wait() { | |
2403 sem_wait(&_semaphore); | |
2404 } | |
2405 | |
2406 bool Semaphore::trywait() { | |
2407 return sem_trywait(&_semaphore) == 0; | |
2408 } | |
2409 | |
2410 bool Semaphore::timedwait(unsigned int sec, int nsec) { | |
17738 | 2411 |
10405 | 2412 struct timespec ts; |
17738 | 2413 // Semaphore's are always associated with CLOCK_REALTIME |
2414 os::Linux::clock_gettime(CLOCK_REALTIME, &ts); | |
2415 // see unpackTime for discussion on overflow checking | |
2416 if (sec >= MAX_SECS) { | |
2417 ts.tv_sec += MAX_SECS; | |
2418 ts.tv_nsec = 0; | |
2419 } else { | |
2420 ts.tv_sec += sec; | |
2421 ts.tv_nsec += nsec; | |
2422 if (ts.tv_nsec >= NANOSECS_PER_SEC) { | |
2423 ts.tv_nsec -= NANOSECS_PER_SEC; | |
2424 ++ts.tv_sec; // note: this must be <= max_secs | |
2425 } | |
2426 } | |
10405 | 2427 |
2428 while (1) { | |
2429 int result = sem_timedwait(&_semaphore, &ts); | |
2430 if (result == 0) { | |
2431 return true; | |
2432 } else if (errno == EINTR) { | |
2433 continue; | |
2434 } else if (errno == ETIMEDOUT) { | |
2435 return false; | |
2436 } else { | |
2437 return false; | |
2438 } | |
2439 } | |
2440 } | |
2441 | |
0 | 2442 extern "C" { |
2443 typedef void (*sa_handler_t)(int); | |
2444 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
2445 } | |
2446 | |
2447 void* os::signal(int signal_number, void* handler) { | |
2448 struct sigaction sigAct, oldSigAct; | |
2449 | |
2450 sigfillset(&(sigAct.sa_mask)); | |
2451 sigAct.sa_flags = SA_RESTART|SA_SIGINFO; | |
2452 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
2453 | |
2454 if (sigaction(signal_number, &sigAct, &oldSigAct)) { | |
2455 // -1 means registration failed | |
2456 return (void *)-1; | |
2457 } | |
2458 | |
2459 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
2460 } | |
2461 | |
2462 void os::signal_raise(int signal_number) { | |
2463 ::raise(signal_number); | |
2464 } | |
2465 | |
2466 /* | |
2467 * The following code is moved from os.cpp for making this | |
2468 * code platform specific, which it is by its very nature. | |
2469 */ | |
2470 | |
2471 // Will be modified when max signal is changed to be dynamic | |
2472 int os::sigexitnum_pd() { | |
2473 return NSIG; | |
2474 } | |
2475 | |
2476 // a counter for each possible signal value | |
2477 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
2478 | |
2479 // Linux(POSIX) specific hand shaking semaphore. | |
2480 static sem_t sig_sem; | |
10405 | 2481 static Semaphore sr_semaphore; |
0 | 2482 |
2483 void os::signal_init_pd() { | |
2484 // Initialize signal structures | |
2485 ::memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
2486 | |
2487 // Initialize signal semaphore | |
2488 ::sem_init(&sig_sem, 0, 0); | |
2489 } | |
2490 | |
2491 void os::signal_notify(int sig) { | |
2492 Atomic::inc(&pending_signals[sig]); | |
2493 ::sem_post(&sig_sem); | |
2494 } | |
2495 | |
2496 static int check_pending_signals(bool wait) { | |
2497 Atomic::store(0, &sigint_count); | |
2498 for (;;) { | |
2499 for (int i = 0; i < NSIG + 1; i++) { | |
2500 jint n = pending_signals[i]; | |
2501 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
2502 return i; | |
2503 } | |
2504 } | |
2505 if (!wait) { | |
2506 return -1; | |
2507 } | |
2508 JavaThread *thread = JavaThread::current(); | |
2509 ThreadBlockInVM tbivm(thread); | |
2510 | |
2511 bool threadIsSuspended; | |
2512 do { | |
2513 thread->set_suspend_equivalent(); | |
2514 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
2515 ::sem_wait(&sig_sem); | |
2516 | |
2517 // were we externally suspended while we were waiting? | |
2518 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
2519 if (threadIsSuspended) { | |
2520 // | |
2521 // The semaphore has been incremented, but while we were waiting | |
2522 // another thread suspended us. We don't want to continue running | |
2523 // while suspended because that would surprise the thread that | |
2524 // suspended us. | |
2525 // | |
2526 ::sem_post(&sig_sem); | |
2527 | |
2528 thread->java_suspend_self(); | |
2529 } | |
2530 } while (threadIsSuspended); | |
2531 } | |
2532 } | |
2533 | |
2534 int os::signal_lookup() { | |
2535 return check_pending_signals(false); | |
2536 } | |
2537 | |
2538 int os::signal_wait() { | |
2539 return check_pending_signals(true); | |
2540 } | |
2541 | |
2542 //////////////////////////////////////////////////////////////////////////////// | |
2543 // Virtual Memory | |
2544 | |
2545 int os::vm_page_size() { | |
2546 // Seems redundant as all get out | |
2547 assert(os::Linux::page_size() != -1, "must call os::init"); | |
2548 return os::Linux::page_size(); | |
2549 } | |
2550 | |
2551 // Solaris allocates memory by pages. | |
2552 int os::vm_allocation_granularity() { | |
2553 assert(os::Linux::page_size() != -1, "must call os::init"); | |
2554 return os::Linux::page_size(); | |
2555 } | |
2556 | |
2557 // Rationale behind this function: | |
2558 // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable | |
2559 // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get | |
2560 // samples for JITted code. Here we create private executable mapping over the code cache | |
2561 // and then we can use standard (well, almost, as mapping can change) way to provide | |
2562 // info for the reporting script by storing timestamp and location of symbol | |
2563 void linux_wrap_code(char* base, size_t size) { | |
2564 static volatile jint cnt = 0; | |
2565 | |
2566 if (!UseOprofile) { | |
2567 return; | |
2568 } | |
2569 | |
1497
96d554193f72
6944822: Fix for 6938627 exposes problem with hard-coded buffer sizes
coleenp
parents:
1353
diff
changeset
|
2570 char buf[PATH_MAX+1]; |
0 | 2571 int num = Atomic::add(1, &cnt); |
2572 | |
1353
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
parents:
1325
diff
changeset
|
2573 snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d", |
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
parents:
1325
diff
changeset
|
2574 os::get_temp_directory(), os::current_process_id(), num); |
0 | 2575 unlink(buf); |
2576 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2577 int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
0 | 2578 |
2579 if (fd != -1) { | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2580 off_t rv = ::lseek(fd, size-2, SEEK_SET); |
0 | 2581 if (rv != (off_t)-1) { |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2582 if (::write(fd, "", 1) == 1) { |
0 | 2583 mmap(base, size, |
2584 PROT_READ|PROT_WRITE|PROT_EXEC, | |
2585 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); | |
2586 } | |
2587 } | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2588 ::close(fd); |
0 | 2589 unlink(buf); |
2590 } | |
2591 } | |
2592 | |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2593 static bool recoverable_mmap_error(int err) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2594 // See if the error is one we can let the caller handle. This |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2595 // list of errno values comes from JBS-6843484. I can't find a |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2596 // Linux man page that documents this specific set of errno |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2597 // values so while this list currently matches Solaris, it may |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2598 // change as we gain experience with this failure mode. |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2599 switch (err) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2600 case EBADF: |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2601 case EINVAL: |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2602 case ENOTSUP: |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2603 // let the caller deal with these errors |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2604 return true; |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2605 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2606 default: |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2607 // Any remaining errors on this OS can cause our reserved mapping |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2608 // to be lost. That can cause confusion where different data |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2609 // structures think they have the same memory mapped. The worst |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2610 // scenario is if both the VM and a library think they have the |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2611 // same memory mapped. |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2612 return false; |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2613 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2614 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2615 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2616 static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2617 int err) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2618 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2619 ", %d) failed; error='%s' (errno=%d)", addr, size, exec, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2620 strerror(err), err); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2621 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2622 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2623 static void warn_fail_commit_memory(char* addr, size_t size, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2624 size_t alignment_hint, bool exec, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2625 int err) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2626 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2627 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, size, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2628 alignment_hint, exec, strerror(err), err); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2629 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2630 |
0 | 2631 // NOTE: Linux kernel does not really reserve the pages for us. |
2632 // All it does is to check if there are enough free pages | |
2633 // left at the time of mmap(). This could be a potential | |
2634 // problem. | |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2635 int os::Linux::commit_memory_impl(char* addr, size_t size, bool exec) { |
656 | 2636 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
2637 uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, | |
0 | 2638 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
3885 | 2639 if (res != (uintptr_t) MAP_FAILED) { |
2640 if (UseNUMAInterleaving) { | |
2641 numa_make_global(addr, size); | |
2642 } | |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2643 return 0; |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2644 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2645 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2646 int err = errno; // save errno from mmap() call above |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2647 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2648 if (!recoverable_mmap_error(err)) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2649 warn_fail_commit_memory(addr, size, exec, err); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2650 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "committing reserved memory."); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2651 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2652 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2653 return err; |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2654 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2655 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2656 bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2657 return os::Linux::commit_memory_impl(addr, size, exec) == 0; |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2658 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2659 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2660 void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2661 const char* mesg) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2662 assert(mesg != NULL, "mesg must be specified"); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2663 int err = os::Linux::commit_memory_impl(addr, size, exec); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2664 if (err != 0) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2665 // the caller wants all commit errors to exit with the specified mesg: |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2666 warn_fail_commit_memory(addr, size, exec, err); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2667 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2668 } |
0 | 2669 } |
2670 | |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2671 // Define MAP_HUGETLB here so we can build HotSpot on old systems. |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2672 #ifndef MAP_HUGETLB |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2673 #define MAP_HUGETLB 0x40000 |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2674 #endif |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2675 |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2676 // Define MADV_HUGEPAGE here so we can build HotSpot on old systems. |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2677 #ifndef MADV_HUGEPAGE |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2678 #define MADV_HUGEPAGE 14 |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2679 #endif |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2680 |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2681 int os::Linux::commit_memory_impl(char* addr, size_t size, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2682 size_t alignment_hint, bool exec) { |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
2683 int err = os::Linux::commit_memory_impl(addr, size, exec); |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2684 if (err == 0) { |
3913
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2685 realign_memory(addr, size, alignment_hint); |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2686 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2687 return err; |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2688 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2689 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2690 bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2691 bool exec) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2692 return os::Linux::commit_memory_impl(addr, size, alignment_hint, exec) == 0; |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2693 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2694 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2695 void os::pd_commit_memory_or_exit(char* addr, size_t size, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2696 size_t alignment_hint, bool exec, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2697 const char* mesg) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2698 assert(mesg != NULL, "mesg must be specified"); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2699 int err = os::Linux::commit_memory_impl(addr, size, alignment_hint, exec); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2700 if (err != 0) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2701 // the caller wants all commit errors to exit with the specified mesg: |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2702 warn_fail_commit_memory(addr, size, alignment_hint, exec, err); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2703 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2704 } |
0 | 2705 } |
2706 | |
6197 | 2707 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
2708 if (UseTransparentHugePages && alignment_hint > (size_t)vm_page_size()) { |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2709 // We don't check the return value: madvise(MADV_HUGEPAGE) may not |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2710 // be supported or the memory may already be backed by huge pages. |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2711 ::madvise(addr, bytes, MADV_HUGEPAGE); |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2712 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2713 } |
141 | 2714 |
6197 | 2715 void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
5937
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2716 // This method works by doing an mmap over an existing mmaping and effectively discarding |
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2717 // the existing pages. However it won't work for SHM-based large pages that cannot be |
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2718 // uncommitted at all. We don't do anything in this case to avoid creating a segment with |
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2719 // small pages on top of the SHM segment. This method always works for small pages, so we |
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2720 // allow that in any case. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
2721 if (alignment_hint <= (size_t)os::vm_page_size() || can_commit_large_page_memory()) { |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
2722 commit_memory(addr, bytes, alignment_hint, !ExecMem); |
5937
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2723 } |
141 | 2724 } |
2725 | |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2726 void os::numa_make_global(char *addr, size_t bytes) { |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2727 Linux::numa_interleave_memory(addr, bytes); |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2728 } |
141 | 2729 |
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2730 // Define for numa_set_bind_policy(int). Setting the argument to 0 will set the |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2731 // bind policy to MPOL_PREFERRED for the current thread. |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2732 #define USE_MPOL_PREFERRED 0 |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2733 |
141 | 2734 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2735 // To make NUMA and large pages more robust when both enabled, we need to ease |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2736 // the requirements on where the memory should be allocated. MPOL_BIND is the |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2737 // default policy and it will force memory to be allocated on the specified |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2738 // node. Changing this to MPOL_PREFERRED will prefer to allocate the memory on |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2739 // the specified node, but will not force it. Using this policy will prevent |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2740 // getting SIGBUS when trying to allocate large pages on NUMA nodes with no |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2741 // free large pages. |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2742 Linux::numa_set_bind_policy(USE_MPOL_PREFERRED); |
141 | 2743 Linux::numa_tonode_memory(addr, bytes, lgrp_hint); |
2744 } | |
2745 | |
2746 bool os::numa_topology_changed() { return false; } | |
2747 | |
2748 size_t os::numa_get_groups_num() { | |
2749 int max_node = Linux::numa_max_node(); | |
2750 return max_node > 0 ? max_node + 1 : 1; | |
2751 } | |
2752 | |
2753 int os::numa_get_group_id() { | |
2754 int cpu_id = Linux::sched_getcpu(); | |
2755 if (cpu_id != -1) { | |
2756 int lgrp_id = Linux::get_node_by_cpu(cpu_id); | |
2757 if (lgrp_id != -1) { | |
2758 return lgrp_id; | |
2759 } | |
0 | 2760 } |
2761 return 0; | |
2762 } | |
2763 | |
141 | 2764 size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
2765 for (size_t i = 0; i < size; i++) { | |
2766 ids[i] = i; | |
2767 } | |
2768 return size; | |
2769 } | |
2770 | |
0 | 2771 bool os::get_page_info(char *start, page_info* info) { |
2772 return false; | |
2773 } | |
2774 | |
2775 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
2776 return end; | |
2777 } | |
2778 | |
3826 | 2779 |
2780 int os::Linux::sched_getcpu_syscall(void) { | |
2781 unsigned int cpu; | |
2782 int retval = -1; | |
2783 | |
2784 #if defined(IA32) | |
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2785 # ifndef SYS_getcpu |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2786 # define SYS_getcpu 318 |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2787 # endif |
3826 | 2788 retval = syscall(SYS_getcpu, &cpu, NULL, NULL); |
2789 #elif defined(AMD64) | |
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2790 // Unfortunately we have to bring all these macros here from vsyscall.h |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2791 // to be able to compile on old linuxes. |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2792 # define __NR_vgetcpu 2 |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2793 # define VSYSCALL_START (-10UL << 20) |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2794 # define VSYSCALL_SIZE 1024 |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2795 # define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) |
3826 | 2796 typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache); |
2797 vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu); | |
2798 retval = vgetcpu(&cpu, NULL, NULL); | |
2799 #endif | |
2800 | |
2801 return (retval == -1) ? retval : cpu; | |
2802 } | |
2803 | |
2191 | 2804 // Something to do with the numa-aware allocator needs these symbols |
2805 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { } | |
2806 extern "C" JNIEXPORT void numa_error(char *where) { } | |
2807 extern "C" JNIEXPORT int fork1() { return fork(); } | |
141 | 2808 |
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2809 |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2810 // If we are running with libnuma version > 2, then we should |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2811 // be trying to use symbols with versions 1.1 |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2812 // If we are running with earlier version, which did not have symbol versions, |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2813 // we should use the base version. |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2814 void* os::Linux::libnuma_dlsym(void* handle, const char *name) { |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2815 void *f = dlvsym(handle, name, "libnuma_1.1"); |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2816 if (f == NULL) { |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2817 f = dlsym(handle, name); |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2818 } |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2819 return f; |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2820 } |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2821 |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2822 bool os::Linux::libnuma_init() { |
141 | 2823 // sched_getcpu() should be in libc. |
2824 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, | |
2825 dlsym(RTLD_DEFAULT, "sched_getcpu"))); | |
2826 | |
3826 | 2827 // If it's not, try a direct syscall. |
2828 if (sched_getcpu() == -1) | |
2829 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall)); | |
2830 | |
141 | 2831 if (sched_getcpu() != -1) { // Does it work? |
267
9d6a3a6891f8
6720130: NUMA allocator: The linux version should search for libnuma.so.1
iveresov
parents:
199
diff
changeset
|
2832 void *handle = dlopen("libnuma.so.1", RTLD_LAZY); |
141 | 2833 if (handle != NULL) { |
2834 set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t, | |
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2835 libnuma_dlsym(handle, "numa_node_to_cpus"))); |
141 | 2836 set_numa_max_node(CAST_TO_FN_PTR(numa_max_node_func_t, |
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2837 libnuma_dlsym(handle, "numa_max_node"))); |
141 | 2838 set_numa_available(CAST_TO_FN_PTR(numa_available_func_t, |
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2839 libnuma_dlsym(handle, "numa_available"))); |
141 | 2840 set_numa_tonode_memory(CAST_TO_FN_PTR(numa_tonode_memory_func_t, |
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2841 libnuma_dlsym(handle, "numa_tonode_memory"))); |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2842 set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t, |
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2843 libnuma_dlsym(handle, "numa_interleave_memory"))); |
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2844 set_numa_set_bind_policy(CAST_TO_FN_PTR(numa_set_bind_policy_func_t, |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2845 libnuma_dlsym(handle, "numa_set_bind_policy"))); |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2846 |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2847 |
141 | 2848 if (numa_available() != -1) { |
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2849 set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes")); |
141 | 2850 // Create a cpu -> node mapping |
6197 | 2851 _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(0, true); |
141 | 2852 rebuild_cpu_to_node_map(); |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2853 return true; |
141 | 2854 } |
2855 } | |
2856 } | |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2857 return false; |
141 | 2858 } |
2859 | |
2860 // rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id. | |
2861 // The table is later used in get_node_by_cpu(). | |
2862 void os::Linux::rebuild_cpu_to_node_map() { | |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2863 const size_t NCPUS = 32768; // Since the buffer size computation is very obscure |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2864 // in libnuma (possible values are starting from 16, |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2865 // and continuing up with every other power of 2, but less |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2866 // than the maximum number of CPUs supported by kernel), and |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2867 // is a subject to change (in libnuma version 2 the requirements |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2868 // are more reasonable) we'll just hardcode the number they use |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2869 // in the library. |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2870 const size_t BitsPerCLong = sizeof(long) * CHAR_BIT; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2871 |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2872 size_t cpu_num = os::active_processor_count(); |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2873 size_t cpu_map_size = NCPUS / BitsPerCLong; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2874 size_t cpu_map_valid_size = |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2875 MIN2((cpu_num + BitsPerCLong - 1) / BitsPerCLong, cpu_map_size); |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2876 |
141 | 2877 cpu_to_node()->clear(); |
2878 cpu_to_node()->at_grow(cpu_num - 1); | |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2879 size_t node_num = numa_get_groups_num(); |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2880 |
6197 | 2881 unsigned long *cpu_map = NEW_C_HEAP_ARRAY(unsigned long, cpu_map_size, mtInternal); |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2882 for (size_t i = 0; i < node_num; i++) { |
141 | 2883 if (numa_node_to_cpus(i, cpu_map, cpu_map_size * sizeof(unsigned long)) != -1) { |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2884 for (size_t j = 0; j < cpu_map_valid_size; j++) { |
141 | 2885 if (cpu_map[j] != 0) { |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2886 for (size_t k = 0; k < BitsPerCLong; k++) { |
141 | 2887 if (cpu_map[j] & (1UL << k)) { |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2888 cpu_to_node()->at_put(j * BitsPerCLong + k, i); |
141 | 2889 } |
2890 } | |
2891 } | |
2892 } | |
2893 } | |
2894 } | |
6197 | 2895 FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal); |
141 | 2896 } |
2897 | |
2898 int os::Linux::get_node_by_cpu(int cpu_id) { | |
2899 if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) { | |
2900 return cpu_to_node()->at(cpu_id); | |
2901 } | |
2902 return -1; | |
2903 } | |
2904 | |
2905 GrowableArray<int>* os::Linux::_cpu_to_node; | |
2906 os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu; | |
2907 os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus; | |
2908 os::Linux::numa_max_node_func_t os::Linux::_numa_max_node; | |
2909 os::Linux::numa_available_func_t os::Linux::_numa_available; | |
2910 os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory; | |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2911 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory; |
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2912 os::Linux::numa_set_bind_policy_func_t os::Linux::_numa_set_bind_policy; |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2913 unsigned long* os::Linux::_numa_all_nodes; |
141 | 2914 |
6197 | 2915 bool os::pd_uncommit_memory(char* addr, size_t size) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2916 uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2917 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2918 return res != (uintptr_t) MAP_FAILED; |
0 | 2919 } |
2920 | |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2921 static |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2922 address get_stack_commited_bottom(address bottom, size_t size) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2923 address nbot = bottom; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2924 address ntop = bottom + size; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2925 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2926 size_t page_sz = os::vm_page_size(); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2927 unsigned pages = size / page_sz; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2928 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2929 unsigned char vec[1]; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2930 unsigned imin = 1, imax = pages + 1, imid; |
17765 | 2931 int mincore_return_value = 0; |
2932 | |
2933 assert(imin <= imax, "Unexpected page size"); | |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2934 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2935 while (imin < imax) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2936 imid = (imax + imin) / 2; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2937 nbot = ntop - (imid * page_sz); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2938 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2939 // Use a trick with mincore to check whether the page is mapped or not. |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2940 // mincore sets vec to 1 if page resides in memory and to 0 if page |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2941 // is swapped output but if page we are asking for is unmapped |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2942 // it returns -1,ENOMEM |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2943 mincore_return_value = mincore(nbot, page_sz, vec); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2944 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2945 if (mincore_return_value == -1) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2946 // Page is not mapped go up |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2947 // to find first mapped page |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2948 if (errno != EAGAIN) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2949 assert(errno == ENOMEM, "Unexpected mincore errno"); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2950 imax = imid; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2951 } |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2952 } else { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2953 // Page is mapped go down |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2954 // to find first not mapped page |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2955 imin = imid + 1; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2956 } |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2957 } |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2958 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2959 nbot = nbot + page_sz; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2960 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2961 // Adjust stack bottom one page up if last checked page is not mapped |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2962 if (mincore_return_value == -1) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2963 nbot = nbot + page_sz; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2964 } |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2965 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2966 return nbot; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2967 } |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2968 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2969 |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2970 // Linux uses a growable mapping for the stack, and if the mapping for |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2971 // the stack guard pages is not removed when we detach a thread the |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2972 // stack cannot grow beyond the pages where the stack guard was |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2973 // mapped. If at some point later in the process the stack expands to |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2974 // that point, the Linux kernel cannot expand the stack any further |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2975 // because the guard pages are in the way, and a segfault occurs. |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2976 // |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2977 // However, it's essential not to split the stack region by unmapping |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2978 // a region (leaving a hole) that's already part of the stack mapping, |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2979 // so if the stack mapping has already grown beyond the guard pages at |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2980 // the time we create them, we have to truncate the stack mapping. |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2981 // So, we need to know the extent of the stack mapping when |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2982 // create_stack_guard_pages() is called. |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2983 |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2984 // We only need this for stacks that are growable: at the time of |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2985 // writing thread stacks don't use growable mappings (i.e. those |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2986 // creeated with MAP_GROWSDOWN), and aren't marked "[stack]", so this |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2987 // only applies to the main thread. |
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2988 |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2989 // If the (growable) stack mapping already extends beyond the point |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2990 // where we're going to put our guard pages, truncate the mapping at |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2991 // that point by munmap()ping it. This ensures that when we later |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2992 // munmap() the guard pages we don't leave a hole in the stack |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2993 // mapping. This only affects the main/initial thread |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2994 |
6197 | 2995 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2996 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2997 if (os::Linux::is_initial_thread()) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2998 // As we manually grow stack up to bottom inside create_attached_thread(), |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2999 // it's likely that os::Linux::initial_thread_stack_bottom is mapped and |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3000 // we don't need to do anything special. |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3001 // Check it first, before calling heavy function. |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3002 uintptr_t stack_extent = (uintptr_t) os::Linux::initial_thread_stack_bottom(); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3003 unsigned char vec[1]; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3004 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3005 if (mincore((address)stack_extent, os::vm_page_size(), vec) == -1) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3006 // Fallback to slow path on all errors, including EAGAIN |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3007 stack_extent = (uintptr_t) get_stack_commited_bottom( |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3008 os::Linux::initial_thread_stack_bottom(), |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3009 (size_t)addr - stack_extent); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3010 } |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3011 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3012 if (stack_extent < (uintptr_t)addr) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3013 ::munmap((void*)stack_extent, (uintptr_t)(addr - stack_extent)); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3014 } |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3015 } |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3016 |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3017 return os::commit_memory(addr, size, !ExecMem); |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3018 } |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3019 |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3020 // If this is a growable mapping, remove the guard pages entirely by |
1750
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
3021 // munmap()ping them. If not, just call uncommit_memory(). This only |
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
3022 // affects the main/initial thread, but guard against future OS changes |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3023 // It's safe to always unmap guard pages for initial thread because we |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3024 // always place it right after end of the mapped region |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3025 |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3026 bool os::remove_stack_guard_pages(char* addr, size_t size) { |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3027 uintptr_t stack_extent, stack_base; |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3028 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3029 if (os::Linux::is_initial_thread()) { |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3030 return ::munmap(addr, size) == 0; |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3031 } |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3032 |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3033 return os::uncommit_memory(addr, size); |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3034 } |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3035 |
0 | 3036 static address _highest_vm_reserved_address = NULL; |
3037 | |
3038 // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory | |
3039 // at 'requested_addr'. If there are existing memory mappings at the same | |
3040 // location, however, they will be overwritten. If 'fixed' is false, | |
3041 // 'requested_addr' is only treated as a hint, the return value may or | |
3042 // may not start from the requested address. Unlike Linux mmap(), this | |
3043 // function returns NULL to indicate failure. | |
3044 static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { | |
3045 char * addr; | |
3046 int flags; | |
3047 | |
3048 flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; | |
3049 if (fixed) { | |
3050 assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address"); | |
3051 flags |= MAP_FIXED; | |
3052 } | |
3053 | |
10157 | 3054 // Map reserved/uncommitted pages PROT_NONE so we fail early if we |
3055 // touch an uncommitted page. Otherwise, the read/write might | |
3056 // succeed if we have enough swap space to back the physical page. | |
3057 addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, | |
0 | 3058 flags, -1, 0); |
3059 | |
3060 if (addr != MAP_FAILED) { | |
3061 // anon_mmap() should only get called during VM initialization, | |
3062 // don't need lock (actually we can skip locking even it can be called | |
3063 // from multiple threads, because _highest_vm_reserved_address is just a | |
3064 // hint about the upper limit of non-stack memory regions.) | |
3065 if ((address)addr + bytes > _highest_vm_reserved_address) { | |
3066 _highest_vm_reserved_address = (address)addr + bytes; | |
3067 } | |
3068 } | |
3069 | |
3070 return addr == MAP_FAILED ? NULL : addr; | |
3071 } | |
3072 | |
3073 // Don't update _highest_vm_reserved_address, because there might be memory | |
3074 // regions above addr + size. If so, releasing a memory region only creates | |
3075 // a hole in the address space, it doesn't help prevent heap-stack collision. | |
3076 // | |
3077 static int anon_munmap(char * addr, size_t size) { | |
3078 return ::munmap(addr, size) == 0; | |
3079 } | |
3080 | |
6197 | 3081 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
0 | 3082 size_t alignment_hint) { |
3083 return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); | |
3084 } | |
3085 | |
6197 | 3086 bool os::pd_release_memory(char* addr, size_t size) { |
0 | 3087 return anon_munmap(addr, size); |
3088 } | |
3089 | |
3090 static address highest_vm_reserved_address() { | |
3091 return _highest_vm_reserved_address; | |
3092 } | |
3093 | |
3094 static bool linux_mprotect(char* addr, size_t size, int prot) { | |
3095 // Linux wants the mprotect address argument to be page aligned. | |
3096 char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size()); | |
3097 | |
3098 // According to SUSv3, mprotect() should only be used with mappings | |
3099 // established by mmap(), and mmap() always maps whole pages. Unaligned | |
3100 // 'addr' likely indicates problem in the VM (e.g. trying to change | |
3101 // protection of malloc'ed or statically allocated memory). Check the | |
3102 // caller if you hit this assert. | |
3103 assert(addr == bottom, "sanity check"); | |
3104 | |
3105 size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size()); | |
3106 return ::mprotect(bottom, size, prot) == 0; | |
3107 } | |
3108 | |
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3109 // Set protections specified |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3110 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3111 bool is_committed) { |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3112 unsigned int p = 0; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3113 switch (prot) { |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3114 case MEM_PROT_NONE: p = PROT_NONE; break; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3115 case MEM_PROT_READ: p = PROT_READ; break; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3116 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3117 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3118 default: |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3119 ShouldNotReachHere(); |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3120 } |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3121 // is_committed is unused. |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3122 return linux_mprotect(addr, bytes, p); |
0 | 3123 } |
3124 | |
3125 bool os::guard_memory(char* addr, size_t size) { | |
3126 return linux_mprotect(addr, size, PROT_NONE); | |
3127 } | |
3128 | |
3129 bool os::unguard_memory(char* addr, size_t size) { | |
477
24fda36852ce
6727377: VM stack guard pages on Windows should PAGE_READWRITE not PAGE_EXECUTE_READWRITE
coleenp
parents:
462
diff
changeset
|
3130 return linux_mprotect(addr, size, PROT_READ|PROT_WRITE); |
0 | 3131 } |
3132 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3133 bool os::Linux::transparent_huge_pages_sanity_check(bool warn, size_t page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3134 bool result = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3135 void *p = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3136 MAP_ANONYMOUS|MAP_PRIVATE, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3137 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3138 if (p != MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3139 void *aligned_p = align_ptr_up(p, page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3140 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3141 result = madvise(aligned_p, page_size, MADV_HUGEPAGE) == 0; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3142 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3143 munmap(p, page_size * 2); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3144 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3145 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3146 if (warn && !result) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3147 warning("TransparentHugePages is not supported by the operating system."); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3148 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3149 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3150 return result; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3151 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3152 |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3153 bool os::Linux::hugetlbfs_sanity_check(bool warn, size_t page_size) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3154 bool result = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3155 void *p = mmap(NULL, page_size, PROT_READ|PROT_WRITE, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3156 MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3157 -1, 0); |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3158 |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3159 if (p != MAP_FAILED) { |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3160 // We don't know if this really is a huge page or not. |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3161 FILE *fp = fopen("/proc/self/maps", "r"); |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3162 if (fp) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3163 while (!feof(fp)) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3164 char chars[257]; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3165 long x = 0; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3166 if (fgets(chars, sizeof(chars), fp)) { |
3358 | 3167 if (sscanf(chars, "%lx-%*x", &x) == 1 |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3168 && x == (long)p) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3169 if (strstr (chars, "hugepage")) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3170 result = true; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3171 break; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3172 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3173 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3174 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3175 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3176 fclose(fp); |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3177 } |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3178 munmap(p, page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3179 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3180 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3181 if (warn && !result) { |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3182 warning("HugeTLBFS is not supported by the operating system."); |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3183 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3184 |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3185 return result; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3186 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3187 |
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3188 /* |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3189 * Set the coredump_filter bits to include largepages in core dump (bit 6) |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3190 * |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3191 * From the coredump_filter documentation: |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3192 * |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3193 * - (bit 0) anonymous private memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3194 * - (bit 1) anonymous shared memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3195 * - (bit 2) file-backed private memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3196 * - (bit 3) file-backed shared memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3197 * - (bit 4) ELF header pages in file-backed private memory areas (it is |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3198 * effective only if the bit 2 is cleared) |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3199 * - (bit 5) hugetlb private memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3200 * - (bit 6) hugetlb shared memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3201 */ |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3202 static void set_coredump_filter(void) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3203 FILE *f; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3204 long cdm; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3205 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3206 if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3207 return; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3208 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3209 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3210 if (fscanf(f, "%lx", &cdm) != 1) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3211 fclose(f); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3212 return; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3213 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3214 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3215 rewind(f); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3216 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3217 if ((cdm & LARGEPAGES_BIT) == 0) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3218 cdm |= LARGEPAGES_BIT; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3219 fprintf(f, "%#lx", cdm); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3220 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3221 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3222 fclose(f); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3223 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3224 |
0 | 3225 // Large page support |
3226 | |
3227 static size_t _large_page_size = 0; | |
3228 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3229 size_t os::Linux::find_large_page_size() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3230 size_t large_page_size = 0; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3231 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3232 // large_page_size on Linux is used to round up heap size. x86 uses either |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3233 // 2M or 4M page, depending on whether PAE (Physical Address Extensions) |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3234 // mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. IA64 can use |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3235 // page as large as 256M. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3236 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3237 // Here we try to figure out page size by parsing /proc/meminfo and looking |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3238 // for a line with the following format: |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3239 // Hugepagesize: 2048 kB |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3240 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3241 // If we can't determine the value (e.g. /proc is not mounted, or the text |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3242 // format has been changed), we'll use the largest page size supported by |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3243 // the processor. |
0 | 3244 |
1010 | 3245 #ifndef ZERO |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3246 large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M) |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3247 ARM_ONLY(2 * M) PPC_ONLY(4 * M); |
1010 | 3248 #endif // ZERO |
0 | 3249 |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3250 FILE *fp = fopen("/proc/meminfo", "r"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3251 if (fp) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3252 while (!feof(fp)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3253 int x = 0; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3254 char buf[16]; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3255 if (fscanf(fp, "Hugepagesize: %d", &x) == 1) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3256 if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3257 large_page_size = x * K; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3258 break; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3259 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3260 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3261 // skip to next line |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3262 for (;;) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3263 int ch = fgetc(fp); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3264 if (ch == EOF || ch == (int)'\n') break; |
0 | 3265 } |
3266 } | |
3267 } | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3268 fclose(fp); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3269 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3270 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3271 if (!FLAG_IS_DEFAULT(LargePageSizeInBytes) && LargePageSizeInBytes != large_page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3272 warning("Setting LargePageSizeInBytes has no effect on this OS. Large page size is " |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3273 SIZE_FORMAT "%s.", byte_size_in_proper_unit(large_page_size), |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3274 proper_unit_for_byte_size(large_page_size)); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3275 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3276 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3277 return large_page_size; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3278 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3279 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3280 size_t os::Linux::setup_large_page_size() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3281 _large_page_size = Linux::find_large_page_size(); |
0 | 3282 const size_t default_page_size = (size_t)Linux::page_size(); |
3283 if (_large_page_size > default_page_size) { | |
3284 _page_sizes[0] = _large_page_size; | |
3285 _page_sizes[1] = default_page_size; | |
3286 _page_sizes[2] = 0; | |
3287 } | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3288 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3289 return _large_page_size; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3290 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3291 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3292 bool os::Linux::setup_large_page_type(size_t page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3293 if (FLAG_IS_DEFAULT(UseHugeTLBFS) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3294 FLAG_IS_DEFAULT(UseSHM) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3295 FLAG_IS_DEFAULT(UseTransparentHugePages)) { |
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3296 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3297 // The type of large pages has not been specified by the user. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3298 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3299 // Try UseHugeTLBFS and then UseSHM. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3300 UseHugeTLBFS = UseSHM = true; |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3301 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3302 // Don't try UseTransparentHugePages since there are known |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3303 // performance issues with it turned on. This might change in the future. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3304 UseTransparentHugePages = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3305 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3306 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3307 if (UseTransparentHugePages) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3308 bool warn_on_failure = !FLAG_IS_DEFAULT(UseTransparentHugePages); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3309 if (transparent_huge_pages_sanity_check(warn_on_failure, page_size)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3310 UseHugeTLBFS = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3311 UseSHM = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3312 return true; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3313 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3314 UseTransparentHugePages = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3315 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3316 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3317 if (UseHugeTLBFS) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3318 bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3319 if (hugetlbfs_sanity_check(warn_on_failure, page_size)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3320 UseSHM = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3321 return true; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3322 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3323 UseHugeTLBFS = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3324 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3325 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3326 return UseSHM; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3327 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3328 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3329 void os::large_page_init() { |
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3330 if (!UseLargePages && |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3331 !UseTransparentHugePages && |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3332 !UseHugeTLBFS && |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3333 !UseSHM) { |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3334 // Not using large pages. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3335 return; |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3336 } |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3337 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3338 if (!FLAG_IS_DEFAULT(UseLargePages) && !UseLargePages) { |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3339 // The user explicitly turned off large pages. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3340 // Ignore the rest of the large pages flags. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3341 UseTransparentHugePages = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3342 UseHugeTLBFS = false; |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3343 UseSHM = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3344 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3345 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3346 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3347 size_t large_page_size = Linux::setup_large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3348 UseLargePages = Linux::setup_large_page_type(large_page_size); |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3349 |
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3350 set_coredump_filter(); |
0 | 3351 } |
3352 | |
3353 #ifndef SHM_HUGETLB | |
3354 #define SHM_HUGETLB 04000 | |
3355 #endif | |
3356 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3357 char* os::Linux::reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
656 | 3358 // "exec" is passed in but not used. Creating the shared image for |
3359 // the code cache doesn't have an SHM_X executable permission to check. | |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3360 assert(UseLargePages && UseSHM, "only for SHM large pages"); |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3361 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3362 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3363 if (!is_size_aligned(bytes, os::large_page_size()) || alignment > os::large_page_size()) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3364 return NULL; // Fallback to small pages. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3365 } |
0 | 3366 |
3367 key_t key = IPC_PRIVATE; | |
3368 char *addr; | |
3369 | |
3370 bool warn_on_failure = UseLargePages && | |
3371 (!FLAG_IS_DEFAULT(UseLargePages) || | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3372 !FLAG_IS_DEFAULT(UseSHM) || |
0 | 3373 !FLAG_IS_DEFAULT(LargePageSizeInBytes) |
3374 ); | |
3375 char msg[128]; | |
3376 | |
3377 // Create a large shared memory region to attach to based on size. | |
3378 // Currently, size is the total size of the heap | |
3379 int shmid = shmget(key, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); | |
3380 if (shmid == -1) { | |
3381 // Possible reasons for shmget failure: | |
3382 // 1. shmmax is too small for Java heap. | |
3383 // > check shmmax value: cat /proc/sys/kernel/shmmax | |
3384 // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax | |
3385 // 2. not enough large page memory. | |
3386 // > check available large pages: cat /proc/meminfo | |
3387 // > increase amount of large pages: | |
3388 // echo new_value > /proc/sys/vm/nr_hugepages | |
3389 // Note 1: different Linux may use different name for this property, | |
3390 // e.g. on Redhat AS-3 it is "hugetlb_pool". | |
3391 // Note 2: it's possible there's enough physical memory available but | |
3392 // they are so fragmented after a long run that they can't | |
3393 // coalesce into large pages. Try to reserve large pages when | |
3394 // the system is still "fresh". | |
3395 if (warn_on_failure) { | |
3396 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
3397 warning("%s", msg); |
0 | 3398 } |
3399 return NULL; | |
3400 } | |
3401 | |
3402 // attach to the region | |
1537
79bf863697eb
6951686: Using large pages on Linux prevents zero based compressed oops
kvn
parents:
1500
diff
changeset
|
3403 addr = (char*)shmat(shmid, req_addr, 0); |
0 | 3404 int err = errno; |
3405 | |
3406 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
3407 // will be deleted when it's detached by shmdt() or when the process | |
3408 // terminates. If shmat() is not successful this will remove the shared | |
3409 // segment immediately. | |
3410 shmctl(shmid, IPC_RMID, NULL); | |
3411 | |
3412 if ((intptr_t)addr == -1) { | |
3413 if (warn_on_failure) { | |
3414 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
3415 warning("%s", msg); |
0 | 3416 } |
3417 return NULL; | |
3418 } | |
3419 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3420 return addr; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3421 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3422 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3423 static void warn_on_large_pages_failure(char* req_addr, size_t bytes, int error) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3424 assert(error == ENOMEM, "Only expect to fail if no memory is available"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3425 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3426 bool warn_on_failure = UseLargePages && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3427 (!FLAG_IS_DEFAULT(UseLargePages) || |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3428 !FLAG_IS_DEFAULT(UseHugeTLBFS) || |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3429 !FLAG_IS_DEFAULT(LargePageSizeInBytes)); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3430 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3431 if (warn_on_failure) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3432 char msg[128]; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3433 jio_snprintf(msg, sizeof(msg), "Failed to reserve large pages memory req_addr: " |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3434 PTR_FORMAT " bytes: " SIZE_FORMAT " (errno = %d).", req_addr, bytes, error); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
3435 warning("%s", msg); |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3436 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3437 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3438 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3439 char* os::Linux::reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3440 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3441 assert(is_size_aligned(bytes, os::large_page_size()), "Unaligned size"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3442 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3443 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3444 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3445 char* addr = (char*)::mmap(req_addr, bytes, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3446 MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3447 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3448 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3449 if (addr == MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3450 warn_on_large_pages_failure(req_addr, bytes, errno); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3451 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3452 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3453 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3454 assert(is_ptr_aligned(addr, os::large_page_size()), "Must be"); |
8711
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3455 |
0 | 3456 return addr; |
3457 } | |
3458 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3459 char* os::Linux::reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3460 size_t large_page_size = os::large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3461 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3462 assert(bytes >= large_page_size, "Shouldn't allocate large pages for small sizes"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3463 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3464 // Allocate small pages. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3465 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3466 char* start; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3467 if (req_addr != NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3468 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3469 assert(is_size_aligned(bytes, alignment), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3470 start = os::reserve_memory(bytes, req_addr); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3471 assert(start == NULL || start == req_addr, "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3472 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3473 start = os::reserve_memory_aligned(bytes, alignment); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3474 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3475 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3476 if (start == NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3477 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3478 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3479 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3480 assert(is_ptr_aligned(start, alignment), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3481 |
20360 | 3482 if (MemTracker::tracking_level() > NMT_minimal) { |
3483 // os::reserve_memory_special will record this memory area. | |
3484 // Need to release it here to prevent overlapping reservations. | |
3485 Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); | |
3486 tkr.record((address)start, bytes); | |
3487 } | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3488 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3489 char* end = start + bytes; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3490 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3491 // Find the regions of the allocated chunk that can be promoted to large pages. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3492 char* lp_start = (char*)align_ptr_up(start, large_page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3493 char* lp_end = (char*)align_ptr_down(end, large_page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3494 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3495 size_t lp_bytes = lp_end - lp_start; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3496 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3497 assert(is_size_aligned(lp_bytes, large_page_size), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3498 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3499 if (lp_bytes == 0) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3500 // The mapped region doesn't even span the start and the end of a large page. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3501 // Fall back to allocate a non-special area. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3502 ::munmap(start, end - start); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3503 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3504 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3505 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3506 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3507 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3508 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3509 void* result; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3510 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3511 if (start != lp_start) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3512 result = ::mmap(start, lp_start - start, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3513 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3514 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3515 if (result == MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3516 ::munmap(lp_start, end - lp_start); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3517 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3518 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3519 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3520 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3521 result = ::mmap(lp_start, lp_bytes, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3522 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_HUGETLB, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3523 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3524 if (result == MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3525 warn_on_large_pages_failure(req_addr, bytes, errno); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3526 // If the mmap above fails, the large pages region will be unmapped and we |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3527 // have regions before and after with small pages. Release these regions. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3528 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3529 // | mapped | unmapped | mapped | |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3530 // ^ ^ ^ ^ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3531 // start lp_start lp_end end |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3532 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3533 ::munmap(start, lp_start - start); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3534 ::munmap(lp_end, end - lp_end); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3535 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3536 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3537 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3538 if (lp_end != end) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3539 result = ::mmap(lp_end, end - lp_end, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3540 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3541 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3542 if (result == MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3543 ::munmap(start, lp_end - start); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3544 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3545 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3546 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3547 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3548 return start; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3549 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3550 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3551 char* os::Linux::reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3552 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3553 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3554 assert(is_power_of_2(alignment), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3555 assert(is_power_of_2(os::large_page_size()), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3556 assert(bytes >= os::large_page_size(), "Shouldn't allocate large pages for small sizes"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3557 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3558 if (is_size_aligned(bytes, os::large_page_size()) && alignment <= os::large_page_size()) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3559 return reserve_memory_special_huge_tlbfs_only(bytes, req_addr, exec); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3560 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3561 return reserve_memory_special_huge_tlbfs_mixed(bytes, alignment, req_addr, exec); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3562 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3563 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3564 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3565 char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3566 assert(UseLargePages, "only for large pages"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3567 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3568 char* addr; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3569 if (UseSHM) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3570 addr = os::Linux::reserve_memory_special_shm(bytes, alignment, req_addr, exec); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3571 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3572 assert(UseHugeTLBFS, "must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3573 addr = os::Linux::reserve_memory_special_huge_tlbfs(bytes, alignment, req_addr, exec); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3574 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3575 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3576 if (addr != NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3577 if (UseNUMAInterleaving) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3578 numa_make_global(addr, bytes); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3579 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3580 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3581 // The memory is committed |
20360 | 3582 MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, CALLER_PC); |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3583 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3584 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3585 return addr; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3586 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3587 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3588 bool os::Linux::release_memory_special_shm(char* base, size_t bytes) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3589 // detaching the SHM segment will also delete it, see reserve_memory_special_shm() |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3590 return shmdt(base) == 0; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3591 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3592 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3593 bool os::Linux::release_memory_special_huge_tlbfs(char* base, size_t bytes) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3594 return pd_release_memory(base, bytes); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3595 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3596 |
0 | 3597 bool os::release_memory_special(char* base, size_t bytes) { |
20360 | 3598 bool res; |
3599 if (MemTracker::tracking_level() > NMT_minimal) { | |
3600 Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); | |
3601 res = os::Linux::release_memory_special_impl(base, bytes); | |
3602 if (res) { | |
3603 tkr.record((address)base, bytes); | |
3604 } | |
3605 | |
3606 } else { | |
3607 res = os::Linux::release_memory_special_impl(base, bytes); | |
3608 } | |
3609 return res; | |
3610 } | |
3611 | |
3612 bool os::Linux::release_memory_special_impl(char* base, size_t bytes) { | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3613 assert(UseLargePages, "only for large pages"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3614 bool res; |
20360 | 3615 |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3616 if (UseSHM) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3617 res = os::Linux::release_memory_special_shm(base, bytes); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3618 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3619 assert(UseHugeTLBFS, "must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3620 res = os::Linux::release_memory_special_huge_tlbfs(base, bytes); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3621 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3622 return res; |
0 | 3623 } |
3624 | |
3625 size_t os::large_page_size() { | |
3626 return _large_page_size; | |
3627 } | |
3628 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3629 // With SysV SHM the entire memory region must be allocated as shared |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3630 // memory. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3631 // HugeTLBFS allows application to commit large page memory on demand. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3632 // However, when committing memory with HugeTLBFS fails, the region |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3633 // that was supposed to be committed will lose the old reservation |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3634 // and allow other threads to steal that memory region. Because of this |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3635 // behavior we can't commit HugeTLBFS memory. |
0 | 3636 bool os::can_commit_large_page_memory() { |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3637 return UseTransparentHugePages; |
0 | 3638 } |
3639 | |
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3640 bool os::can_execute_large_page_memory() { |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3641 return UseTransparentHugePages || UseHugeTLBFS; |
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3642 } |
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3643 |
0 | 3644 // Reserve memory at an arbitrary address, only if that area is |
3645 // available (and not reserved for something else). | |
3646 | |
6197 | 3647 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
0 | 3648 const int max_tries = 10; |
3649 char* base[max_tries]; | |
3650 size_t size[max_tries]; | |
3651 const size_t gap = 0x000000; | |
3652 | |
3653 // Assert only that the size is a multiple of the page size, since | |
3654 // that's all that mmap requires, and since that's all we really know | |
3655 // about at this low abstraction level. If we need higher alignment, | |
3656 // we can either pass an alignment to this method or verify alignment | |
3657 // in one of the methods further up the call chain. See bug 5044738. | |
3658 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
3659 | |
3660 // Repeatedly allocate blocks until the block is allocated at the | |
3661 // right spot. Give up after max_tries. Note that reserve_memory() will | |
3662 // automatically update _highest_vm_reserved_address if the call is | |
3663 // successful. The variable tracks the highest memory address every reserved | |
3664 // by JVM. It is used to detect heap-stack collision if running with | |
3665 // fixed-stack LinuxThreads. Because here we may attempt to reserve more | |
3666 // space than needed, it could confuse the collision detecting code. To | |
3667 // solve the problem, save current _highest_vm_reserved_address and | |
3668 // calculate the correct value before return. | |
3669 address old_highest = _highest_vm_reserved_address; | |
3670 | |
3671 // Linux mmap allows caller to pass an address as hint; give it a try first, | |
3672 // if kernel honors the hint then we can return immediately. | |
3673 char * addr = anon_mmap(requested_addr, bytes, false); | |
3674 if (addr == requested_addr) { | |
3675 return requested_addr; | |
3676 } | |
3677 | |
3678 if (addr != NULL) { | |
3679 // mmap() is successful but it fails to reserve at the requested address | |
3680 anon_munmap(addr, bytes); | |
3681 } | |
3682 | |
3683 int i; | |
3684 for (i = 0; i < max_tries; ++i) { | |
3685 base[i] = reserve_memory(bytes); | |
3686 | |
3687 if (base[i] != NULL) { | |
3688 // Is this the block we wanted? | |
3689 if (base[i] == requested_addr) { | |
3690 size[i] = bytes; | |
3691 break; | |
3692 } | |
3693 | |
3694 // Does this overlap the block we wanted? Give back the overlapped | |
3695 // parts and try again. | |
3696 | |
3697 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
3698 if (top_overlap >= 0 && top_overlap < bytes) { | |
3699 unmap_memory(base[i], top_overlap); | |
3700 base[i] += top_overlap; | |
3701 size[i] = bytes - top_overlap; | |
3702 } else { | |
3703 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
3704 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
3705 unmap_memory(requested_addr, bottom_overlap); | |
3706 size[i] = bytes - bottom_overlap; | |
3707 } else { | |
3708 size[i] = bytes; | |
3709 } | |
3710 } | |
3711 } | |
3712 } | |
3713 | |
3714 // Give back the unused reserved pieces. | |
3715 | |
3716 for (int j = 0; j < i; ++j) { | |
3717 if (base[j] != NULL) { | |
3718 unmap_memory(base[j], size[j]); | |
3719 } | |
3720 } | |
3721 | |
3722 if (i < max_tries) { | |
3723 _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); | |
3724 return requested_addr; | |
3725 } else { | |
3726 _highest_vm_reserved_address = old_highest; | |
3727 return NULL; | |
3728 } | |
3729 } | |
3730 | |
3731 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
3732 return ::read(fd, buf, nBytes); | |
3733 } | |
3734 | |
3735 // TODO-FIXME: reconcile Solaris' os::sleep with the linux variation. | |
3736 // Solaris uses poll(), linux uses park(). | |
3737 // Poll() is likely a better choice, assuming that Thread.interrupt() | |
3738 // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with | |
3739 // SIGSEGV, see 4355769. | |
3740 | |
3741 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
3742 assert(thread == Thread::current(), "thread consistency check"); | |
3743 | |
3744 ParkEvent * const slp = thread->_SleepEvent ; | |
3745 slp->reset() ; | |
3746 OrderAccess::fence() ; | |
3747 | |
3748 if (interruptible) { | |
3749 jlong prevtime = javaTimeNanos(); | |
3750 | |
3751 for (;;) { | |
3752 if (os::is_interrupted(thread, true)) { | |
3753 return OS_INTRPT; | |
3754 } | |
3755 | |
3756 jlong newtime = javaTimeNanos(); | |
3757 | |
3758 if (newtime - prevtime < 0) { | |
3759 // time moving backwards, should only happen if no monotonic clock | |
3760 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
3761 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
3762 } else { | |
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3763 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
0 | 3764 } |
3765 | |
3766 if(millis <= 0) { | |
3767 return OS_OK; | |
3768 } | |
3769 | |
3770 prevtime = newtime; | |
3771 | |
3772 { | |
3773 assert(thread->is_Java_thread(), "sanity check"); | |
3774 JavaThread *jt = (JavaThread *) thread; | |
3775 ThreadBlockInVM tbivm(jt); | |
3776 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
3777 | |
3778 jt->set_suspend_equivalent(); | |
3779 // cleared by handle_special_suspend_equivalent_condition() or | |
3780 // java_suspend_self() via check_and_wait_while_suspended() | |
3781 | |
3782 slp->park(millis); | |
3783 | |
3784 // were we externally suspended while we were waiting? | |
3785 jt->check_and_wait_while_suspended(); | |
3786 } | |
3787 } | |
3788 } else { | |
3789 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
3790 jlong prevtime = javaTimeNanos(); | |
3791 | |
3792 for (;;) { | |
3793 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on | |
3794 // the 1st iteration ... | |
3795 jlong newtime = javaTimeNanos(); | |
3796 | |
3797 if (newtime - prevtime < 0) { | |
3798 // time moving backwards, should only happen if no monotonic clock | |
3799 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
3800 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
3801 } else { | |
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3802 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
0 | 3803 } |
3804 | |
3805 if(millis <= 0) break ; | |
3806 | |
3807 prevtime = newtime; | |
3808 slp->park(millis); | |
3809 } | |
3810 return OS_OK ; | |
3811 } | |
3812 } | |
3813 | |
17706
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3814 // |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3815 // Short sleep, direct OS call. |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3816 // |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3817 // Note: certain versions of Linux CFS scheduler (since 2.6.23) do not guarantee |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3818 // sched_yield(2) will actually give up the CPU: |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3819 // |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3820 // * Alone on this pariticular CPU, keeps running. |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3821 // * Before the introduction of "skip_buddy" with "compat_yield" disabled |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3822 // (pre 2.6.39). |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3823 // |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3824 // So calling this with 0 is an alternative. |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3825 // |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3826 void os::naked_short_sleep(jlong ms) { |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3827 struct timespec req; |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3828 |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3829 assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3830 req.tv_sec = 0; |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3831 if (ms > 0) { |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3832 req.tv_nsec = (ms % 1000) * 1000000; |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3833 } |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3834 else { |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3835 req.tv_nsec = 1; |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3836 } |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3837 |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3838 nanosleep(&req, NULL); |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3839 |
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3840 return; |
0 | 3841 } |
3842 | |
3843 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
3844 void os::infinite_sleep() { | |
3845 while (true) { // sleep forever ... | |
3846 ::sleep(100); // ... 100 seconds at a time | |
3847 } | |
3848 } | |
3849 | |
3850 // Used to convert frequent JVM_Yield() to nops | |
3851 bool os::dont_yield() { | |
3852 return DontYieldALot; | |
3853 } | |
3854 | |
3855 void os::yield() { | |
3856 sched_yield(); | |
3857 } | |
3858 | |
3859 os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} | |
3860 | |
3861 void os::yield_all(int attempts) { | |
3862 // Yields to all threads, including threads with lower priorities | |
3863 // Threads on Linux are all with same priority. The Solaris style | |
3864 // os::yield_all() with nanosleep(1ms) is not necessary. | |
3865 sched_yield(); | |
3866 } | |
3867 | |
3868 // Called from the tight loops to possibly influence time-sharing heuristics | |
3869 void os::loop_breaker(int attempts) { | |
3870 os::yield_all(attempts); | |
3871 } | |
3872 | |
3873 //////////////////////////////////////////////////////////////////////////////// | |
3874 // thread priority support | |
3875 | |
3876 // Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER | |
3877 // only supports dynamic priority, static priority must be zero. For real-time | |
3878 // applications, Linux supports SCHED_RR which allows static priority (1-99). | |
3879 // However, for large multi-threaded applications, SCHED_RR is not only slower | |
3880 // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out | |
3881 // of 5 runs - Sep 2005). | |
3882 // | |
3883 // The following code actually changes the niceness of kernel-thread/LWP. It | |
3884 // has an assumption that setpriority() only modifies one kernel-thread/LWP, | |
3885 // not the entire user process, and user level threads are 1:1 mapped to kernel | |
3886 // threads. It has always been the case, but could change in the future. For | |
3887 // this reason, the code should not be used as default (ThreadPriorityPolicy=0). | |
3888 // It is only used when ThreadPriorityPolicy=1 and requires root privilege. | |
3889 | |
4854
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3890 int os::java_to_os_priority[CriticalPriority + 1] = { |
0 | 3891 19, // 0 Entry should never be used |
3892 | |
3893 4, // 1 MinPriority | |
3894 3, // 2 | |
3895 2, // 3 | |
3896 | |
3897 1, // 4 | |
3898 0, // 5 NormPriority | |
3899 -1, // 6 | |
3900 | |
3901 -2, // 7 | |
3902 -3, // 8 | |
3903 -4, // 9 NearMaxPriority | |
3904 | |
4854
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3905 -5, // 10 MaxPriority |
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3906 |
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3907 -5 // 11 CriticalPriority |
0 | 3908 }; |
3909 | |
3910 static int prio_init() { | |
3911 if (ThreadPriorityPolicy == 1) { | |
3912 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 | |
3913 // if effective uid is not root. Perhaps, a more elegant way of doing | |
3914 // this is to test CAP_SYS_NICE capability, but that will require libcap.so | |
3915 if (geteuid() != 0) { | |
3916 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { | |
3917 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); | |
3918 } | |
3919 ThreadPriorityPolicy = 0; | |
3920 } | |
3921 } | |
4854
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3922 if (UseCriticalJavaThreadPriority) { |
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3923 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3924 } |
0 | 3925 return 0; |
3926 } | |
3927 | |
3928 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
3929 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; | |
3930 | |
3931 int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); | |
3932 return (ret == 0) ? OS_OK : OS_ERR; | |
3933 } | |
3934 | |
3935 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
3936 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { | |
3937 *priority_ptr = java_to_os_priority[NormPriority]; | |
3938 return OS_OK; | |
3939 } | |
3940 | |
3941 errno = 0; | |
3942 *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); | |
3943 return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); | |
3944 } | |
3945 | |
3946 // Hint to the underlying OS that a task switch would not be good. | |
3947 // Void return because it's a hint and can fail. | |
3948 void os::hint_no_preempt() {} | |
3949 | |
3950 //////////////////////////////////////////////////////////////////////////////// | |
3951 // suspend/resume support | |
3952 | |
3953 // the low-level signal-based suspend/resume support is a remnant from the | |
3954 // old VM-suspension that used to be for java-suspension, safepoints etc, | |
3955 // within hotspot. Now there is a single use-case for this: | |
3956 // - calling get_thread_pc() on the VMThread by the flat-profiler task | |
3957 // that runs in the watcher thread. | |
3958 // The remaining code is greatly simplified from the more general suspension | |
3959 // code that used to be used. | |
3960 // | |
3961 // The protocol is quite simple: | |
3962 // - suspend: | |
3963 // - sends a signal to the target thread | |
3964 // - polls the suspend state of the osthread using a yield loop | |
3965 // - target thread signal handler (SR_handler) sets suspend state | |
3966 // and blocks in sigsuspend until continued | |
3967 // - resume: | |
3968 // - sets target osthread state to continue | |
3969 // - sends signal to end the sigsuspend loop in the SR_handler | |
3970 // | |
3971 // Note that the SR_lock plays no role in this suspend/resume protocol. | |
3972 // | |
3973 | |
3974 static void resume_clear_context(OSThread *osthread) { | |
3975 osthread->set_ucontext(NULL); | |
3976 osthread->set_siginfo(NULL); | |
3977 } | |
3978 | |
3979 static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { | |
3980 osthread->set_ucontext(context); | |
3981 osthread->set_siginfo(siginfo); | |
3982 } | |
3983 | |
3984 // | |
3985 // Handler function invoked when a thread's execution is suspended or | |
3986 // resumed. We have to be careful that only async-safe functions are | |
3987 // called here (Note: most pthread functions are not async safe and | |
3988 // should be avoided.) | |
3989 // | |
3990 // Note: sigwait() is a more natural fit than sigsuspend() from an | |
3991 // interface point of view, but sigwait() prevents the signal hander | |
3992 // from being run. libpthread would get very confused by not having | |
3993 // its signal handlers run and prevents sigwait()'s use with the | |
3994 // mutex granting granting signal. | |
3995 // | |
10405 | 3996 // Currently only ever called on the VMThread and JavaThreads (PC sampling) |
0 | 3997 // |
3998 static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { | |
3999 // Save and restore errno to avoid confusing native code with EINTR | |
4000 // after sigsuspend. | |
4001 int old_errno = errno; | |
4002 | |
4003 Thread* thread = Thread::current(); | |
4004 OSThread* osthread = thread->osthread(); | |
10405 | 4005 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
4006 | |
4007 os::SuspendResume::State current = osthread->sr.state(); | |
4008 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { | |
0 | 4009 suspend_save_context(osthread, siginfo, context); |
4010 | |
10405 | 4011 // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
4012 os::SuspendResume::State state = osthread->sr.suspended(); | |
4013 if (state == os::SuspendResume::SR_SUSPENDED) { | |
4014 sigset_t suspend_set; // signals for sigsuspend() | |
4015 | |
4016 // get current set of blocked signals and unblock resume signal | |
4017 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); | |
4018 sigdelset(&suspend_set, SR_signum); | |
4019 | |
4020 sr_semaphore.signal(); | |
4021 // wait here until we are resumed | |
4022 while (1) { | |
4023 sigsuspend(&suspend_set); | |
4024 | |
4025 os::SuspendResume::State result = osthread->sr.running(); | |
4026 if (result == os::SuspendResume::SR_RUNNING) { | |
4027 sr_semaphore.signal(); | |
4028 break; | |
4029 } | |
4030 } | |
4031 | |
4032 } else if (state == os::SuspendResume::SR_RUNNING) { | |
4033 // request was cancelled, continue | |
4034 } else { | |
4035 ShouldNotReachHere(); | |
4036 } | |
0 | 4037 |
4038 resume_clear_context(osthread); | |
10405 | 4039 } else if (current == os::SuspendResume::SR_RUNNING) { |
4040 // request was cancelled, continue | |
4041 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { | |
4042 // ignore | |
0 | 4043 } else { |
10405 | 4044 // ignore |
0 | 4045 } |
4046 | |
4047 errno = old_errno; | |
4048 } | |
4049 | |
4050 | |
4051 static int SR_initialize() { | |
4052 struct sigaction act; | |
4053 char *s; | |
4054 /* Get signal number to use for suspend/resume */ | |
4055 if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { | |
4056 int sig = ::strtol(s, 0, 10); | |
4057 if (sig > 0 || sig < _NSIG) { | |
4058 SR_signum = sig; | |
4059 } | |
4060 } | |
4061 | |
4062 assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, | |
4063 "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); | |
4064 | |
4065 sigemptyset(&SR_sigset); | |
4066 sigaddset(&SR_sigset, SR_signum); | |
4067 | |
4068 /* Set up signal handler for suspend/resume */ | |
4069 act.sa_flags = SA_RESTART|SA_SIGINFO; | |
4070 act.sa_handler = (void (*)(int)) SR_handler; | |
4071 | |
4072 // SR_signum is blocked by default. | |
4073 // 4528190 - We also need to block pthread restart signal (32 on all | |
4074 // supported Linux platforms). Note that LinuxThreads need to block | |
4075 // this signal for all threads to work properly. So we don't have | |
4076 // to use hard-coded signal number when setting up the mask. | |
4077 pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); | |
4078 | |
4079 if (sigaction(SR_signum, &act, 0) == -1) { | |
4080 return -1; | |
4081 } | |
4082 | |
4083 // Save signal flag | |
4084 os::Linux::set_our_sigflags(SR_signum, act.sa_flags); | |
4085 return 0; | |
4086 } | |
4087 | |
10405 | 4088 static int sr_notify(OSThread* osthread) { |
4089 int status = pthread_kill(osthread->pthread_id(), SR_signum); | |
4090 assert_status(status == 0, status, "pthread_kill"); | |
4091 return status; | |
4092 } | |
4093 | |
4094 // "Randomly" selected value for how long we want to spin | |
4095 // before bailing out on suspending a thread, also how often | |
4096 // we send a signal to a thread we want to resume | |
4097 static const int RANDOMLY_LARGE_INTEGER = 1000000; | |
4098 static const int RANDOMLY_LARGE_INTEGER2 = 100; | |
0 | 4099 |
4100 // returns true on success and false on error - really an error is fatal | |
4101 // but this seems the normal response to library errors | |
4102 static bool do_suspend(OSThread* osthread) { | |
10405 | 4103 assert(osthread->sr.is_running(), "thread should be running"); |
4104 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); | |
4105 | |
0 | 4106 // mark as suspended and send signal |
10405 | 4107 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
4108 // failed to switch, state wasn't running? | |
4109 ShouldNotReachHere(); | |
4110 return false; | |
4111 } | |
4112 | |
4113 if (sr_notify(osthread) != 0) { | |
4114 ShouldNotReachHere(); | |
4115 } | |
4116 | |
4117 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED | |
4118 while (true) { | |
4119 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
4120 break; | |
4121 } else { | |
4122 // timeout | |
4123 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); | |
4124 if (cancelled == os::SuspendResume::SR_RUNNING) { | |
4125 return false; | |
4126 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { | |
4127 // make sure that we consume the signal on the semaphore as well | |
4128 sr_semaphore.wait(); | |
4129 break; | |
4130 } else { | |
4131 ShouldNotReachHere(); | |
4132 return false; | |
4133 } | |
0 | 4134 } |
10405 | 4135 } |
4136 | |
4137 guarantee(osthread->sr.is_suspended(), "Must be suspended"); | |
4138 return true; | |
0 | 4139 } |
4140 | |
4141 static void do_resume(OSThread* osthread) { | |
4142 assert(osthread->sr.is_suspended(), "thread should be suspended"); | |
10405 | 4143 assert(!sr_semaphore.trywait(), "invalid semaphore state"); |
4144 | |
4145 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { | |
4146 // failed to switch to WAKEUP_REQUEST | |
4147 ShouldNotReachHere(); | |
4148 return; | |
4149 } | |
4150 | |
4151 while (true) { | |
4152 if (sr_notify(osthread) == 0) { | |
4153 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
4154 if (osthread->sr.is_running()) { | |
4155 return; | |
4156 } | |
4157 } | |
4158 } else { | |
4159 ShouldNotReachHere(); | |
0 | 4160 } |
4161 } | |
10405 | 4162 |
4163 guarantee(osthread->sr.is_running(), "Must be running!"); | |
0 | 4164 } |
4165 | |
4166 //////////////////////////////////////////////////////////////////////////////// | |
4167 // interrupt support | |
4168 | |
4169 void os::interrupt(Thread* thread) { | |
4170 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
4171 "possibility of dangling Thread pointer"); | |
4172 | |
4173 OSThread* osthread = thread->osthread(); | |
4174 | |
4175 if (!osthread->interrupted()) { | |
4176 osthread->set_interrupted(true); | |
4177 // More than one thread can get here with the same value of osthread, | |
4178 // resulting in multiple notifications. We do, however, want the store | |
4179 // to interrupted() to be visible to other threads before we execute unpark(). | |
4180 OrderAccess::fence(); | |
4181 ParkEvent * const slp = thread->_SleepEvent ; | |
4182 if (slp != NULL) slp->unpark() ; | |
4183 } | |
4184 | |
4185 // For JSR166. Unpark even if interrupt status already was set | |
4186 if (thread->is_Java_thread()) | |
4187 ((JavaThread*)thread)->parker()->unpark(); | |
4188 | |
4189 ParkEvent * ev = thread->_ParkEvent ; | |
4190 if (ev != NULL) ev->unpark() ; | |
4191 | |
4192 } | |
4193 | |
4194 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
4195 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
4196 "possibility of dangling Thread pointer"); | |
4197 | |
4198 OSThread* osthread = thread->osthread(); | |
4199 | |
4200 bool interrupted = osthread->interrupted(); | |
4201 | |
4202 if (interrupted && clear_interrupted) { | |
4203 osthread->set_interrupted(false); | |
4204 // consider thread->_SleepEvent->reset() ... optional optimization | |
4205 } | |
4206 | |
4207 return interrupted; | |
4208 } | |
4209 | |
4210 /////////////////////////////////////////////////////////////////////////////////// | |
4211 // signal handling (except suspend/resume) | |
4212 | |
4213 // This routine may be used by user applications as a "hook" to catch signals. | |
4214 // The user-defined signal handler must pass unrecognized signals to this | |
4215 // routine, and if it returns true (non-zero), then the signal handler must | |
4216 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
4217 // routine will never retun false (zero), but instead will execute a VM panic | |
4218 // routine kill the process. | |
4219 // | |
4220 // If this routine returns false, it is OK to call it again. This allows | |
4221 // the user-defined signal handler to perform checks either before or after | |
4222 // the VM performs its own checks. Naturally, the user code would be making | |
4223 // a serious error if it tried to handle an exception (such as a null check | |
4224 // or breakpoint) that the VM was generating for its own correct operation. | |
4225 // | |
4226 // This routine may recognize any of the following kinds of signals: | |
4227 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. | |
4228 // It should be consulted by handlers for any of those signals. | |
4229 // | |
4230 // The caller of this routine must pass in the three arguments supplied | |
4231 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
4232 // field of the structure passed to sigaction(). This routine assumes that | |
4233 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
4234 // | |
4235 // Note that the VM will print warnings if it detects conflicting signal | |
4236 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
4237 // | |
2191 | 4238 extern "C" JNIEXPORT int |
0 | 4239 JVM_handle_linux_signal(int signo, siginfo_t* siginfo, |
4240 void* ucontext, int abort_if_unrecognized); | |
4241 | |
4242 void signalHandler(int sig, siginfo_t* info, void* uc) { | |
4243 assert(info != NULL && uc != NULL, "it must be old kernel"); | |
8067 | 4244 int orig_errno = errno; // Preserve errno value over signal handler. |
0 | 4245 JVM_handle_linux_signal(sig, info, uc, true); |
8067 | 4246 errno = orig_errno; |
0 | 4247 } |
4248 | |
4249 | |
4250 // This boolean allows users to forward their own non-matching signals | |
4251 // to JVM_handle_linux_signal, harmlessly. | |
4252 bool os::Linux::signal_handlers_are_installed = false; | |
4253 | |
4254 // For signal-chaining | |
4255 struct sigaction os::Linux::sigact[MAXSIGNUM]; | |
4256 unsigned int os::Linux::sigs = 0; | |
4257 bool os::Linux::libjsig_is_loaded = false; | |
4258 typedef struct sigaction *(*get_signal_t)(int); | |
4259 get_signal_t os::Linux::get_signal_action = NULL; | |
4260 | |
4261 struct sigaction* os::Linux::get_chained_signal_action(int sig) { | |
4262 struct sigaction *actp = NULL; | |
4263 | |
4264 if (libjsig_is_loaded) { | |
4265 // Retrieve the old signal handler from libjsig | |
4266 actp = (*get_signal_action)(sig); | |
4267 } | |
4268 if (actp == NULL) { | |
4269 // Retrieve the preinstalled signal handler from jvm | |
4270 actp = get_preinstalled_handler(sig); | |
4271 } | |
4272 | |
4273 return actp; | |
4274 } | |
4275 | |
4276 static bool call_chained_handler(struct sigaction *actp, int sig, | |
4277 siginfo_t *siginfo, void *context) { | |
4278 // Call the old signal handler | |
4279 if (actp->sa_handler == SIG_DFL) { | |
4280 // It's more reasonable to let jvm treat it as an unexpected exception | |
4281 // instead of taking the default action. | |
4282 return false; | |
4283 } else if (actp->sa_handler != SIG_IGN) { | |
4284 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
4285 // automaticlly block the signal | |
4286 sigaddset(&(actp->sa_mask), sig); | |
4287 } | |
4288 | |
4289 sa_handler_t hand; | |
4290 sa_sigaction_t sa; | |
4291 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
4292 // retrieve the chained handler | |
4293 if (siginfo_flag_set) { | |
4294 sa = actp->sa_sigaction; | |
4295 } else { | |
4296 hand = actp->sa_handler; | |
4297 } | |
4298 | |
4299 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
4300 actp->sa_handler = SIG_DFL; | |
4301 } | |
4302 | |
4303 // try to honor the signal mask | |
4304 sigset_t oset; | |
4305 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
4306 | |
4307 // call into the chained handler | |
4308 if (siginfo_flag_set) { | |
4309 (*sa)(sig, siginfo, context); | |
4310 } else { | |
4311 (*hand)(sig); | |
4312 } | |
4313 | |
4314 // restore the signal mask | |
4315 pthread_sigmask(SIG_SETMASK, &oset, 0); | |
4316 } | |
4317 // Tell jvm's signal handler the signal is taken care of. | |
4318 return true; | |
4319 } | |
4320 | |
4321 bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
4322 bool chained = false; | |
4323 // signal-chaining | |
4324 if (UseSignalChaining) { | |
4325 struct sigaction *actp = get_chained_signal_action(sig); | |
4326 if (actp != NULL) { | |
4327 chained = call_chained_handler(actp, sig, siginfo, context); | |
4328 } | |
4329 } | |
4330 return chained; | |
4331 } | |
4332 | |
4333 struct sigaction* os::Linux::get_preinstalled_handler(int sig) { | |
4334 if ((( (unsigned int)1 << sig ) & sigs) != 0) { | |
4335 return &sigact[sig]; | |
4336 } | |
4337 return NULL; | |
4338 } | |
4339 | |
4340 void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
4341 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4342 sigact[sig] = oldAct; | |
4343 sigs |= (unsigned int)1 << sig; | |
4344 } | |
4345 | |
4346 // for diagnostic | |
4347 int os::Linux::sigflags[MAXSIGNUM]; | |
4348 | |
4349 int os::Linux::get_our_sigflags(int sig) { | |
4350 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4351 return sigflags[sig]; | |
4352 } | |
4353 | |
4354 void os::Linux::set_our_sigflags(int sig, int flags) { | |
4355 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4356 sigflags[sig] = flags; | |
4357 } | |
4358 | |
4359 void os::Linux::set_signal_handler(int sig, bool set_installed) { | |
4360 // Check for overwrite. | |
4361 struct sigaction oldAct; | |
4362 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
4363 | |
4364 void* oldhand = oldAct.sa_sigaction | |
4365 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
4366 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
4367 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
4368 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
4369 oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { | |
4370 if (AllowUserSignalHandlers || !set_installed) { | |
4371 // Do not overwrite; user takes responsibility to forward to us. | |
4372 return; | |
4373 } else if (UseSignalChaining) { | |
4374 // save the old handler in jvm | |
4375 save_preinstalled_handler(sig, oldAct); | |
4376 // libjsig also interposes the sigaction() call below and saves the | |
4377 // old sigaction on it own. | |
4378 } else { | |
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4379 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4380 "%#lx for signal %d.", (long)oldhand, sig)); |
0 | 4381 } |
4382 } | |
4383 | |
4384 struct sigaction sigAct; | |
4385 sigfillset(&(sigAct.sa_mask)); | |
4386 sigAct.sa_handler = SIG_DFL; | |
4387 if (!set_installed) { | |
4388 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
4389 } else { | |
4390 sigAct.sa_sigaction = signalHandler; | |
4391 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
4392 } | |
4393 // Save flags, which are set by ours | |
4394 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4395 sigflags[sig] = sigAct.sa_flags; | |
4396 | |
4397 int ret = sigaction(sig, &sigAct, &oldAct); | |
4398 assert(ret == 0, "check"); | |
4399 | |
4400 void* oldhand2 = oldAct.sa_sigaction | |
4401 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
4402 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
4403 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
4404 } | |
4405 | |
4406 // install signal handlers for signals that HotSpot needs to | |
4407 // handle in order to support Java-level exception handling. | |
4408 | |
4409 void os::Linux::install_signal_handlers() { | |
4410 if (!signal_handlers_are_installed) { | |
4411 signal_handlers_are_installed = true; | |
4412 | |
4413 // signal-chaining | |
4414 typedef void (*signal_setting_t)(); | |
4415 signal_setting_t begin_signal_setting = NULL; | |
4416 signal_setting_t end_signal_setting = NULL; | |
4417 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
4418 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
4419 if (begin_signal_setting != NULL) { | |
4420 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
4421 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
4422 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
4423 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
4424 libjsig_is_loaded = true; | |
4425 assert(UseSignalChaining, "should enable signal-chaining"); | |
4426 } | |
4427 if (libjsig_is_loaded) { | |
4428 // Tell libjsig jvm is setting signal handlers | |
4429 (*begin_signal_setting)(); | |
4430 } | |
4431 | |
4432 set_signal_handler(SIGSEGV, true); | |
4433 set_signal_handler(SIGPIPE, true); | |
4434 set_signal_handler(SIGBUS, true); | |
4435 set_signal_handler(SIGILL, true); | |
4436 set_signal_handler(SIGFPE, true); | |
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4437 #if defined(PPC64) |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4438 set_signal_handler(SIGTRAP, true); |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4439 #endif |
0 | 4440 set_signal_handler(SIGXFSZ, true); |
4441 | |
4442 if (libjsig_is_loaded) { | |
4443 // Tell libjsig jvm finishes setting signal handlers | |
4444 (*end_signal_setting)(); | |
4445 } | |
4446 | |
4447 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4448 // and if UserSignalHandler is installed all bets are off. |
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4449 // Log that signal checking is off only if -verbose:jni is specified. |
0 | 4450 if (CheckJNICalls) { |
4451 if (libjsig_is_loaded) { | |
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4452 if (PrintJNIResolving) { |
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4453 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4454 } |
0 | 4455 check_signals = false; |
4456 } | |
4457 if (AllowUserSignalHandlers) { | |
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4458 if (PrintJNIResolving) { |
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4459 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4460 } |
0 | 4461 check_signals = false; |
4462 } | |
4463 } | |
4464 } | |
4465 } | |
4466 | |
4467 // This is the fastest way to get thread cpu time on Linux. | |
4468 // Returns cpu time (user+sys) for any thread, not only for current. | |
4469 // POSIX compliant clocks are implemented in the kernels 2.6.16+. | |
4470 // It might work on 2.6.10+ with a special kernel/glibc patch. | |
4471 // For reference, please, see IEEE Std 1003.1-2004: | |
4472 // http://www.unix.org/single_unix_specification | |
4473 | |
4474 jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) { | |
4475 struct timespec tp; | |
4476 int rc = os::Linux::clock_gettime(clockid, &tp); | |
4477 assert(rc == 0, "clock_gettime is expected to return 0 code"); | |
4478 | |
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
4479 return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec; |
0 | 4480 } |
4481 | |
4482 ///// | |
4483 // glibc on Linux platform uses non-documented flag | |
4484 // to indicate, that some special sort of signal | |
4485 // trampoline is used. | |
4486 // We will never set this flag, and we should | |
4487 // ignore this flag in our diagnostic | |
4488 #ifdef SIGNIFICANT_SIGNAL_MASK | |
4489 #undef SIGNIFICANT_SIGNAL_MASK | |
4490 #endif | |
4491 #define SIGNIFICANT_SIGNAL_MASK (~0x04000000) | |
4492 | |
4493 static const char* get_signal_handler_name(address handler, | |
4494 char* buf, int buflen) { | |
4495 int offset; | |
4496 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
4497 if (found) { | |
4498 // skip directory names | |
4499 const char *p1, *p2; | |
4500 p1 = buf; | |
4501 size_t len = strlen(os::file_separator()); | |
4502 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
4503 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
4504 } else { | |
4505 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
4506 } | |
4507 return buf; | |
4508 } | |
4509 | |
4510 static void print_signal_handler(outputStream* st, int sig, | |
4511 char* buf, size_t buflen) { | |
4512 struct sigaction sa; | |
4513 | |
4514 sigaction(sig, NULL, &sa); | |
4515 | |
4516 // See comment for SIGNIFICANT_SIGNAL_MASK define | |
4517 sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
4518 | |
4519 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
4520 | |
4521 address handler = (sa.sa_flags & SA_SIGINFO) | |
4522 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
4523 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
4524 | |
4525 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
4526 st->print("SIG_DFL"); | |
4527 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
4528 st->print("SIG_IGN"); | |
4529 } else { | |
4530 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
4531 } | |
4532 | |
14410 | 4533 st->print(", sa_mask[0]="); |
4534 os::Posix::print_signal_set_short(st, &sa.sa_mask); | |
0 | 4535 |
4536 address rh = VMError::get_resetted_sighandler(sig); | |
4537 // May be, handler was resetted by VMError? | |
4538 if(rh != NULL) { | |
4539 handler = rh; | |
4540 sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; | |
4541 } | |
4542 | |
14410 | 4543 st->print(", sa_flags="); |
4544 os::Posix::print_sa_flags(st, sa.sa_flags); | |
0 | 4545 |
4546 // Check: is it our handler? | |
4547 if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || | |
4548 handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { | |
4549 // It is our signal handler | |
4550 // check for flags, reset system-used one! | |
4551 if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
4552 st->print( | |
4553 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
4554 os::Linux::get_our_sigflags(sig)); | |
4555 } | |
4556 } | |
4557 st->cr(); | |
4558 } | |
4559 | |
4560 | |
4561 #define DO_SIGNAL_CHECK(sig) \ | |
4562 if (!sigismember(&check_signal_done, sig)) \ | |
4563 os::Linux::check_signal_handler(sig) | |
4564 | |
4565 // This method is a periodic task to check for misbehaving JNI applications | |
4566 // under CheckJNI, we can add any periodic checks here | |
4567 | |
4568 void os::run_periodic_checks() { | |
4569 | |
4570 if (check_signals == false) return; | |
4571 | |
4572 // SEGV and BUS if overridden could potentially prevent | |
4573 // generation of hs*.log in the event of a crash, debugging | |
4574 // such a case can be very challenging, so we absolutely | |
4575 // check the following for a good measure: | |
4576 DO_SIGNAL_CHECK(SIGSEGV); | |
4577 DO_SIGNAL_CHECK(SIGILL); | |
4578 DO_SIGNAL_CHECK(SIGFPE); | |
4579 DO_SIGNAL_CHECK(SIGBUS); | |
4580 DO_SIGNAL_CHECK(SIGPIPE); | |
4581 DO_SIGNAL_CHECK(SIGXFSZ); | |
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4582 #if defined(PPC64) |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4583 DO_SIGNAL_CHECK(SIGTRAP); |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4584 #endif |
0 | 4585 |
4586 // ReduceSignalUsage allows the user to override these handlers | |
4587 // see comments at the very top and jvm_solaris.h | |
4588 if (!ReduceSignalUsage) { | |
4589 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
4590 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
4591 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
4592 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
4593 } | |
4594 | |
4595 DO_SIGNAL_CHECK(SR_signum); | |
4596 DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); | |
4597 } | |
4598 | |
4599 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
4600 | |
4601 static os_sigaction_t os_sigaction = NULL; | |
4602 | |
4603 void os::Linux::check_signal_handler(int sig) { | |
4604 char buf[O_BUFLEN]; | |
4605 address jvmHandler = NULL; | |
4606 | |
4607 | |
4608 struct sigaction act; | |
4609 if (os_sigaction == NULL) { | |
4610 // only trust the default sigaction, in case it has been interposed | |
4611 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
4612 if (os_sigaction == NULL) return; | |
4613 } | |
4614 | |
4615 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
4616 | |
4617 | |
4618 act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
4619 | |
4620 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
4621 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
4622 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
4623 | |
4624 | |
4625 switch(sig) { | |
4626 case SIGSEGV: | |
4627 case SIGBUS: | |
4628 case SIGFPE: | |
4629 case SIGPIPE: | |
4630 case SIGILL: | |
4631 case SIGXFSZ: | |
4632 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); | |
4633 break; | |
4634 | |
4635 case SHUTDOWN1_SIGNAL: | |
4636 case SHUTDOWN2_SIGNAL: | |
4637 case SHUTDOWN3_SIGNAL: | |
4638 case BREAK_SIGNAL: | |
4639 jvmHandler = (address)user_handler(); | |
4640 break; | |
4641 | |
4642 case INTERRUPT_SIGNAL: | |
4643 jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); | |
4644 break; | |
4645 | |
4646 default: | |
4647 if (sig == SR_signum) { | |
4648 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); | |
4649 } else { | |
4650 return; | |
4651 } | |
4652 break; | |
4653 } | |
4654 | |
4655 if (thisHandler != jvmHandler) { | |
4656 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
4657 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
4658 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
4659 // No need to check this sig any longer | |
4660 sigaddset(&check_signal_done, sig); | |
4661 } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
4662 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
4663 tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig)); | |
4664 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
4665 // No need to check this sig any longer | |
4666 sigaddset(&check_signal_done, sig); | |
4667 } | |
4668 | |
4669 // Dump all the signal | |
4670 if (sigismember(&check_signal_done, sig)) { | |
4671 print_signal_handlers(tty, buf, O_BUFLEN); | |
4672 } | |
4673 } | |
4674 | |
4675 extern void report_error(char* file_name, int line_no, char* title, char* format, ...); | |
4676 | |
4677 extern bool signal_name(int signo, char* buf, size_t len); | |
4678 | |
4679 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
4680 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
4681 // signal | |
4682 if (!signal_name(exception_code, buf, size)) { | |
4683 jio_snprintf(buf, size, "SIG%d", exception_code); | |
4684 } | |
4685 return buf; | |
4686 } else { | |
4687 return NULL; | |
4688 } | |
4689 } | |
4690 | |
4691 // this is called _before_ the most of global arguments have been parsed | |
4692 void os::init(void) { | |
4693 char dummy; /* used to get a guess on initial stack address */ | |
4694 // first_hrtime = gethrtime(); | |
4695 | |
4696 // With LinuxThreads the JavaMain thread pid (primordial thread) | |
4697 // is different than the pid of the java launcher thread. | |
4698 // So, on Linux, the launcher thread pid is passed to the VM | |
4699 // via the sun.java.launcher.pid property. | |
4700 // Use this property instead of getpid() if it was correctly passed. | |
4701 // See bug 6351349. | |
4702 pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); | |
4703 | |
4704 _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); | |
4705 | |
4706 clock_tics_per_sec = sysconf(_SC_CLK_TCK); | |
4707 | |
4708 init_random(1234567); | |
4709 | |
4710 ThreadCritical::initialize(); | |
4711 | |
4712 Linux::set_page_size(sysconf(_SC_PAGESIZE)); | |
4713 if (Linux::page_size() == -1) { | |
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4714 fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)", |
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4715 strerror(errno))); |
0 | 4716 } |
4717 init_page_sizes((size_t) Linux::page_size()); | |
4718 | |
4719 Linux::initialize_system_info(); | |
4720 | |
4721 // main_thread points to the aboriginal thread | |
4722 Linux::_main_thread = pthread_self(); | |
4723 | |
4724 Linux::clock_init(); | |
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
4725 initial_time_count = javaTimeNanos(); |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4726 |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4727 // pthread_condattr initialization for monotonic clock |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4728 int status; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4729 pthread_condattr_t* _condattr = os::Linux::condAttr(); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4730 if ((status = pthread_condattr_init(_condattr)) != 0) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4731 fatal(err_msg("pthread_condattr_init: %s", strerror(status))); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4732 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4733 // Only set the clock if CLOCK_MONOTONIC is available |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4734 if (Linux::supports_monotonic_clock()) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4735 if ((status = pthread_condattr_setclock(_condattr, CLOCK_MONOTONIC)) != 0) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4736 if (status == EINVAL) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4737 warning("Unable to use monotonic clock with relative timed-waits" \ |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4738 " - changes to the time-of-day clock may have adverse affects"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4739 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4740 fatal(err_msg("pthread_condattr_setclock: %s", strerror(status))); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4741 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4742 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4743 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4744 // else it defaults to CLOCK_REALTIME |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4745 |
242 | 4746 pthread_mutex_init(&dl_mutex, NULL); |
10164
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4747 |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4748 // If the pagesize of the VM is greater than 8K determine the appropriate |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4749 // number of initial guard pages. The user can change this with the |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4750 // command line arguments, if needed. |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4751 if (vm_page_size() > (int)Linux::vm_default_page_size()) { |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4752 StackYellowPages = 1; |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4753 StackRedPages = 1; |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4754 StackShadowPages = round_to((StackShadowPages*Linux::vm_default_page_size()), vm_page_size()) / vm_page_size(); |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4755 } |
0 | 4756 } |
4757 | |
4758 // To install functions for atexit system call | |
4759 extern "C" { | |
4760 static void perfMemory_exit_helper() { | |
4761 perfMemory_exit(); | |
4762 } | |
4763 } | |
4764 | |
4765 // this is called _after_ the global arguments have been parsed | |
4766 jint os::init_2(void) | |
4767 { | |
4768 Linux::fast_thread_clock_init(); | |
4769 | |
4770 // Allocate a single page and mark it as readable for safepoint polling | |
4771 address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
4772 guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); | |
4773 | |
4774 os::set_polling_page( polling_page ); | |
4775 | |
4776 #ifndef PRODUCT | |
4777 if(Verbose && PrintMiscellaneous) | |
4778 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
4779 #endif | |
4780 | |
4781 if (!UseMembar) { | |
4782 address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
4783 guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); |
0 | 4784 os::set_memory_serialize_page( mem_serialize_page ); |
4785 | |
4786 #ifndef PRODUCT | |
4787 if(Verbose && PrintMiscellaneous) | |
4788 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
4789 #endif | |
4790 } | |
4791 | |
4792 // initialize suspend/resume support - must do this before signal_sets_init() | |
4793 if (SR_initialize() != 0) { | |
4794 perror("SR_initialize failed"); | |
4795 return JNI_ERR; | |
4796 } | |
4797 | |
4798 Linux::signal_sets_init(); | |
4799 Linux::install_signal_handlers(); | |
4800 | |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4801 // Check minimum allowable stack size for thread creation and to initialize |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4802 // the java system classes, including StackOverflowError - depends on page |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4803 // size. Add a page for compiler2 recursion in main thread. |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4804 // Add in 2*BytesPerWord times page size to account for VM stack during |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4805 // class initialization depending on 32 or 64 bit VM. |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4806 os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed, |
10164
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4807 (size_t)(StackYellowPages+StackRedPages+StackShadowPages) * Linux::page_size() + |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4808 (2*BytesPerWord COMPILER2_PRESENT(+1)) * Linux::vm_default_page_size()); |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4809 |
0 | 4810 size_t threadStackSizeInBytes = ThreadStackSize * K; |
4811 if (threadStackSizeInBytes != 0 && | |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4812 threadStackSizeInBytes < os::Linux::min_stack_allowed) { |
0 | 4813 tty->print_cr("\nThe stack size specified is too small, " |
4814 "Specify at least %dk", | |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4815 os::Linux::min_stack_allowed/ K); |
0 | 4816 return JNI_ERR; |
4817 } | |
4818 | |
4819 // Make the stack size a multiple of the page size so that | |
4820 // the yellow/red zones can be guarded. | |
4821 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
4822 vm_page_size())); | |
4823 | |
4824 Linux::capture_initial_stack(JavaThread::stack_size_at_create()); | |
4825 | |
12313
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4826 #if defined(IA32) |
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4827 workaround_expand_exec_shield_cs_limit(); |
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4828 #endif |
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4829 |
0 | 4830 Linux::libpthread_init(); |
4831 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
4832 tty->print_cr("[HotSpot is running with %s, %s(%s)]\n", | |
4833 Linux::glibc_version(), Linux::libpthread_version(), | |
4834 Linux::is_floating_stack() ? "floating stack" : "fixed stack"); | |
4835 } | |
4836 | |
141 | 4837 if (UseNUMA) { |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4838 if (!Linux::libnuma_init()) { |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4839 UseNUMA = false; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4840 } else { |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4841 if ((Linux::numa_max_node() < 1)) { |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4842 // There's only one node(they start from 0), disable NUMA. |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4843 UseNUMA = false; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4844 } |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4845 } |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4846 // With SHM and HugeTLBFS large pages we cannot uncommit a page, so there's no way |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4847 // we can make the adaptive lgrp chunk resizing work. If the user specified |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4848 // both UseNUMA and UseLargePages (or UseSHM/UseHugeTLBFS) on the command line - warn and |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4849 // disable adaptive resizing. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4850 if (UseNUMA && UseLargePages && !can_commit_large_page_memory()) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4851 if (FLAG_IS_DEFAULT(UseNUMA)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4852 UseNUMA = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4853 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4854 if (FLAG_IS_DEFAULT(UseLargePages) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4855 FLAG_IS_DEFAULT(UseSHM) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4856 FLAG_IS_DEFAULT(UseHugeTLBFS)) { |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4857 UseLargePages = false; |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4858 } else { |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4859 warning("UseNUMA is not fully compatible with SHM/HugeTLBFS large pages, disabling adaptive resizing"); |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4860 UseAdaptiveSizePolicy = false; |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4861 UseAdaptiveNUMAChunkSizing = false; |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4862 } |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4863 } |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4864 } |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4865 if (!UseNUMA && ForceNUMA) { |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4866 UseNUMA = true; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4867 } |
141 | 4868 } |
4869 | |
0 | 4870 if (MaxFDLimit) { |
4871 // set the number of file descriptors to max. print out error | |
4872 // if getrlimit/setrlimit fails but continue regardless. | |
4873 struct rlimit nbr_files; | |
4874 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
4875 if (status != 0) { | |
4876 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
4877 perror("os::init_2 getrlimit failed"); | |
4878 } else { | |
4879 nbr_files.rlim_cur = nbr_files.rlim_max; | |
4880 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
4881 if (status != 0) { | |
4882 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
4883 perror("os::init_2 setrlimit failed"); | |
4884 } | |
4885 } | |
4886 } | |
4887 | |
4888 // Initialize lock used to serialize thread creation (see os::create_thread) | |
4889 Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false)); | |
4890 | |
4891 // at-exit methods are called in the reverse order of their registration. | |
4892 // atexit functions are called on return from main or as a result of a | |
4893 // call to exit(3C). There can be only 32 of these functions registered | |
4894 // and atexit() does not set errno. | |
4895 | |
4896 if (PerfAllowAtExitRegistration) { | |
4897 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
4898 // atexit functions can be delayed until process exit time, which | |
4899 // can be problematic for embedded VM situations. Embedded VMs should | |
4900 // call DestroyJavaVM() to assure that VM resources are released. | |
4901 | |
4902 // note: perfMemory_exit_helper atexit function may be removed in | |
4903 // the future if the appropriate cleanup code can be added to the | |
4904 // VM_Exit VMOperation's doit method. | |
4905 if (atexit(perfMemory_exit_helper) != 0) { | |
14391 | 4906 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
0 | 4907 } |
4908 } | |
4909 | |
4910 // initialize thread priority policy | |
4911 prio_init(); | |
4912 | |
4913 return JNI_OK; | |
4914 } | |
4915 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4916 // this is called at the end of vm_initialization |
14391 | 4917 void os::init_3(void) { |
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4918 #ifdef JAVASE_EMBEDDED |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4919 // Start the MemNotifyThread |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4920 if (LowMemoryProtection) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4921 MemNotifyThread::start(); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4922 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4923 return; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4924 #endif |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4925 } |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4926 |
0 | 4927 // Mark the polling page as unreadable |
4928 void os::make_polling_page_unreadable(void) { | |
4929 if( !guard_memory((char*)_polling_page, Linux::page_size()) ) | |
4930 fatal("Could not disable polling page"); | |
4931 }; | |
4932 | |
4933 // Mark the polling page as readable | |
4934 void os::make_polling_page_readable(void) { | |
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
4935 if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) { |
0 | 4936 fatal("Could not enable polling page"); |
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
4937 } |
0 | 4938 }; |
4939 | |
4940 int os::active_processor_count() { | |
4941 // Linux doesn't yet have a (official) notion of processor sets, | |
4942 // so just return the number of online processors. | |
4943 int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); | |
4944 assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); | |
4945 return online_cpus; | |
4946 } | |
4947 | |
4006 | 4948 void os::set_native_thread_name(const char *name) { |
4949 // Not yet implemented. | |
4950 return; | |
4951 } | |
4952 | |
0 | 4953 bool os::distribute_processes(uint length, uint* distribution) { |
4954 // Not yet implemented. | |
4955 return false; | |
4956 } | |
4957 | |
4958 bool os::bind_to_processor(uint processor_id) { | |
4959 // Not yet implemented. | |
4960 return false; | |
4961 } | |
4962 | |
4963 /// | |
4964 | |
10405 | 4965 void os::SuspendedThreadTask::internal_do_task() { |
4966 if (do_suspend(_thread->osthread())) { | |
4967 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); | |
4968 do_task(context); | |
4969 do_resume(_thread->osthread()); | |
4970 } | |
4971 } | |
4972 | |
4973 class PcFetcher : public os::SuspendedThreadTask { | |
4974 public: | |
4975 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} | |
4976 ExtendedPC result(); | |
4977 protected: | |
4978 void do_task(const os::SuspendedThreadTaskContext& context); | |
4979 private: | |
4980 ExtendedPC _epc; | |
4981 }; | |
4982 | |
4983 ExtendedPC PcFetcher::result() { | |
4984 guarantee(is_done(), "task is not done yet."); | |
4985 return _epc; | |
4986 } | |
4987 | |
4988 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { | |
4989 Thread* thread = context.thread(); | |
4990 OSThread* osthread = thread->osthread(); | |
4991 if (osthread->ucontext() != NULL) { | |
4992 _epc = os::Linux::ucontext_get_pc((ucontext_t *) context.ucontext()); | |
4993 } else { | |
4994 // NULL context is unexpected, double-check this is the VMThread | |
4995 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); | |
4996 } | |
4997 } | |
4998 | |
0 | 4999 // Suspends the target using the signal mechanism and then grabs the PC before |
5000 // resuming the target. Used by the flat-profiler only | |
5001 ExtendedPC os::get_thread_pc(Thread* thread) { | |
5002 // Make sure that it is called by the watcher for the VMThread | |
5003 assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); | |
5004 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
5005 | |
10405 | 5006 PcFetcher fetcher(thread); |
5007 fetcher.run(); | |
5008 return fetcher.result(); | |
0 | 5009 } |
5010 | |
5011 int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) | |
5012 { | |
5013 if (is_NPTL()) { | |
5014 return pthread_cond_timedwait(_cond, _mutex, _abstime); | |
5015 } else { | |
5016 // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control | |
5017 // word back to default 64bit precision if condvar is signaled. Java | |
5018 // wants 53bit precision. Save and restore current value. | |
5019 int fpu = get_fpu_control_word(); | |
5020 int status = pthread_cond_timedwait(_cond, _mutex, _abstime); | |
5021 set_fpu_control_word(fpu); | |
5022 return status; | |
5023 } | |
5024 } | |
5025 | |
5026 //////////////////////////////////////////////////////////////////////////////// | |
5027 // debug support | |
5028 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5029 bool os::find(address addr, outputStream* st) { |
0 | 5030 Dl_info dlinfo; |
5031 memset(&dlinfo, 0, sizeof(dlinfo)); | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5032 if (dladdr(addr, &dlinfo) != 0) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5033 st->print(PTR_FORMAT ": ", addr); |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5034 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5035 st->print("%s+%#x", dlinfo.dli_sname, |
0 | 5036 addr - (intptr_t)dlinfo.dli_saddr); |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5037 } else if (dlinfo.dli_fbase != NULL) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5038 st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
0 | 5039 } else { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5040 st->print("<absolute address>"); |
0 | 5041 } |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5042 if (dlinfo.dli_fname != NULL) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5043 st->print(" in %s", dlinfo.dli_fname); |
0 | 5044 } |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5045 if (dlinfo.dli_fbase != NULL) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5046 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
0 | 5047 } |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5048 st->cr(); |
0 | 5049 |
5050 if (Verbose) { | |
5051 // decode some bytes around the PC | |
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
5052 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); |
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
5053 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
0 | 5054 address lowest = (address) dlinfo.dli_sname; |
5055 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
5056 if (begin < lowest) begin = lowest; | |
5057 Dl_info dlinfo2; | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5058 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
0 | 5059 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) |
5060 end = (address) dlinfo2.dli_saddr; | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5061 Disassembler::decode(begin, end, st); |
0 | 5062 } |
5063 return true; | |
5064 } | |
5065 return false; | |
5066 } | |
5067 | |
5068 //////////////////////////////////////////////////////////////////////////////// | |
5069 // misc | |
5070 | |
5071 // This does not do anything on Linux. This is basically a hook for being | |
5072 // able to use structured exception handling (thread-local exception filters) | |
5073 // on, e.g., Win32. | |
5074 void | |
5075 os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, | |
5076 JavaCallArguments* args, Thread* thread) { | |
5077 f(value, method, args, thread); | |
5078 } | |
5079 | |
5080 void os::print_statistics() { | |
5081 } | |
5082 | |
5083 int os::message_box(const char* title, const char* message) { | |
5084 int i; | |
5085 fdStream err(defaultStream::error_fd()); | |
5086 for (i = 0; i < 78; i++) err.print_raw("="); | |
5087 err.cr(); | |
5088 err.print_raw_cr(title); | |
5089 for (i = 0; i < 78; i++) err.print_raw("-"); | |
5090 err.cr(); | |
5091 err.print_raw_cr(message); | |
5092 for (i = 0; i < 78; i++) err.print_raw("="); | |
5093 err.cr(); | |
5094 | |
5095 char buf[16]; | |
5096 // Prevent process from exiting upon "read error" without consuming all CPU | |
5097 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
5098 | |
5099 return buf[0] == 'y' || buf[0] == 'Y'; | |
5100 } | |
5101 | |
5102 int os::stat(const char *path, struct stat *sbuf) { | |
5103 char pathbuf[MAX_PATH]; | |
5104 if (strlen(path) > MAX_PATH - 1) { | |
5105 errno = ENAMETOOLONG; | |
5106 return -1; | |
5107 } | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5108 os::native_path(strcpy(pathbuf, path)); |
0 | 5109 return ::stat(pathbuf, sbuf); |
5110 } | |
5111 | |
5112 bool os::check_heap(bool force) { | |
5113 return true; | |
5114 } | |
5115 | |
5116 int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { | |
5117 return ::vsnprintf(buf, count, format, args); | |
5118 } | |
5119 | |
5120 // Is a (classpath) directory empty? | |
5121 bool os::dir_is_empty(const char* path) { | |
5122 DIR *dir = NULL; | |
5123 struct dirent *ptr; | |
5124 | |
5125 dir = opendir(path); | |
5126 if (dir == NULL) return true; | |
5127 | |
5128 /* Scan the directory */ | |
5129 bool result = true; | |
5130 char buf[sizeof(struct dirent) + MAX_PATH]; | |
5131 while (result && (ptr = ::readdir(dir)) != NULL) { | |
5132 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
5133 result = false; | |
5134 } | |
5135 } | |
5136 closedir(dir); | |
5137 return result; | |
5138 } | |
5139 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5140 // This code originates from JDK's sysOpen and open64_w |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5141 // from src/solaris/hpi/src/system_md.c |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5142 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5143 #ifndef O_DELETE |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5144 #define O_DELETE 0x10000 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5145 #endif |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5146 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5147 // Open a file. Unlink the file immediately after open returns |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5148 // if the specified oflag has the O_DELETE flag set. |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5149 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5150 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5151 int os::open(const char *path, int oflag, int mode) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5152 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5153 if (strlen(path) > MAX_PATH - 1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5154 errno = ENAMETOOLONG; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5155 return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5156 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5157 int fd; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5158 int o_delete = (oflag & O_DELETE); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5159 oflag = oflag & ~O_DELETE; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5160 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5161 fd = ::open64(path, oflag, mode); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5162 if (fd == -1) return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5163 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5164 //If the open succeeded, the file might still be a directory |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5165 { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5166 struct stat64 buf64; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5167 int ret = ::fstat64(fd, &buf64); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5168 int st_mode = buf64.st_mode; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5169 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5170 if (ret != -1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5171 if ((st_mode & S_IFMT) == S_IFDIR) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5172 errno = EISDIR; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5173 ::close(fd); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5174 return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5175 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5176 } else { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5177 ::close(fd); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5178 return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5179 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5180 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5181 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5182 /* |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5183 * All file descriptors that are opened in the JVM and not |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5184 * specifically destined for a subprocess should have the |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5185 * close-on-exec flag set. If we don't set it, then careless 3rd |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5186 * party native code might fork and exec without closing all |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5187 * appropriate file descriptors (e.g. as we do in closeDescriptors in |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5188 * UNIXProcess.c), and this in turn might: |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5189 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5190 * - cause end-of-file to fail to be detected on some file |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5191 * descriptors, resulting in mysterious hangs, or |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5192 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5193 * - might cause an fopen in the subprocess to fail on a system |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5194 * suffering from bug 1085341. |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5195 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5196 * (Yes, the default setting of the close-on-exec flag is a Unix |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5197 * design flaw) |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5198 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5199 * See: |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5200 * 1085341: 32-bit stdio routines should support file descriptors >255 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5201 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5202 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5203 */ |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5204 #ifdef FD_CLOEXEC |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5205 { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5206 int flags = ::fcntl(fd, F_GETFD); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5207 if (flags != -1) |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5208 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5209 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5210 #endif |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5211 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5212 if (o_delete != 0) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5213 ::unlink(path); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5214 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5215 return fd; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5216 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5217 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5218 |
0 | 5219 // create binary file, rewriting existing file if required |
5220 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
5221 int oflags = O_WRONLY | O_CREAT; | |
5222 if (!rewrite_existing) { | |
5223 oflags |= O_EXCL; | |
5224 } | |
5225 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
5226 } | |
5227 | |
5228 // return current position of file pointer | |
5229 jlong os::current_file_offset(int fd) { | |
5230 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
5231 } | |
5232 | |
5233 // move file pointer to the specified offset | |
5234 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
5235 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
5236 } | |
5237 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5238 // This code originates from JDK's sysAvailable |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5239 // from src/solaris/hpi/src/native_threads/src/sys_api_td.c |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5240 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5241 int os::available(int fd, jlong *bytes) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5242 jlong cur, end; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5243 int mode; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5244 struct stat64 buf64; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5245 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5246 if (::fstat64(fd, &buf64) >= 0) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5247 mode = buf64.st_mode; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5248 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5249 /* |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5250 * XXX: is the following call interruptible? If so, this might |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5251 * need to go through the INTERRUPT_IO() wrapper as for other |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5252 * blocking, interruptible calls in this file. |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5253 */ |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5254 int n; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5255 if (::ioctl(fd, FIONREAD, &n) >= 0) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5256 *bytes = n; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5257 return 1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5258 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5259 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5260 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5261 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5262 return 0; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5263 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5264 return 0; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5265 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5266 return 0; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5267 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5268 *bytes = end - cur; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5269 return 1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5270 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5271 |
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5272 int os::socket_available(int fd, jint *pbytes) { |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5273 // Linux doc says EINTR not returned, unlike Solaris |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5274 int ret = ::ioctl(fd, FIONREAD, pbytes); |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5275 |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5276 //%% note ioctl can return 0 when successful, JVM_SocketAvailable |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5277 // is expected to return 0 on failure and 1 on success to the jdk. |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5278 return (ret < 0) ? 0 : 1; |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5279 } |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5280 |
0 | 5281 // Map a block of memory. |
6197 | 5282 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
0 | 5283 char *addr, size_t bytes, bool read_only, |
5284 bool allow_exec) { | |
5285 int prot; | |
5909 | 5286 int flags = MAP_PRIVATE; |
0 | 5287 |
5288 if (read_only) { | |
5289 prot = PROT_READ; | |
5290 } else { | |
5291 prot = PROT_READ | PROT_WRITE; | |
5292 } | |
5293 | |
5294 if (allow_exec) { | |
5295 prot |= PROT_EXEC; | |
5296 } | |
5297 | |
5298 if (addr != NULL) { | |
5299 flags |= MAP_FIXED; | |
5300 } | |
5301 | |
5302 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
5303 fd, file_offset); | |
5304 if (mapped_address == MAP_FAILED) { | |
5305 return NULL; | |
5306 } | |
5307 return mapped_address; | |
5308 } | |
5309 | |
5310 | |
5311 // Remap a block of memory. | |
6197 | 5312 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
0 | 5313 char *addr, size_t bytes, bool read_only, |
5314 bool allow_exec) { | |
5315 // same as map_memory() on this OS | |
5316 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
5317 allow_exec); | |
5318 } | |
5319 | |
5320 | |
5321 // Unmap a block of memory. | |
6197 | 5322 bool os::pd_unmap_memory(char* addr, size_t bytes) { |
0 | 5323 return munmap(addr, bytes) == 0; |
5324 } | |
5325 | |
5326 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time); | |
5327 | |
5328 static clockid_t thread_cpu_clockid(Thread* thread) { | |
5329 pthread_t tid = thread->osthread()->pthread_id(); | |
5330 clockid_t clockid; | |
5331 | |
5332 // Get thread clockid | |
5333 int rc = os::Linux::pthread_getcpuclockid(tid, &clockid); | |
5334 assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code"); | |
5335 return clockid; | |
5336 } | |
5337 | |
5338 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
5339 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
5340 // of a thread. | |
5341 // | |
5342 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
5343 // the fast estimate available on the platform. | |
5344 | |
5345 jlong os::current_thread_cpu_time() { | |
5346 if (os::Linux::supports_fast_thread_cpu_time()) { | |
5347 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
5348 } else { | |
5349 // return user + sys since the cost is the same | |
5350 return slow_thread_cpu_time(Thread::current(), true /* user + sys */); | |
5351 } | |
5352 } | |
5353 | |
5354 jlong os::thread_cpu_time(Thread* thread) { | |
5355 // consistent with what current_thread_cpu_time() returns | |
5356 if (os::Linux::supports_fast_thread_cpu_time()) { | |
5357 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
5358 } else { | |
5359 return slow_thread_cpu_time(thread, true /* user + sys */); | |
5360 } | |
5361 } | |
5362 | |
5363 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
5364 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
5365 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
5366 } else { | |
5367 return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
5368 } | |
5369 } | |
5370 | |
5371 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
5372 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
5373 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
5374 } else { | |
5375 return slow_thread_cpu_time(thread, user_sys_cpu_time); | |
5376 } | |
5377 } | |
5378 | |
5379 // | |
5380 // -1 on error. | |
5381 // | |
5382 | |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
5383 PRAGMA_DIAG_PUSH |
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
5384 PRAGMA_FORMAT_NONLITERAL_IGNORED |
0 | 5385 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
5386 static bool proc_task_unchecked = true; | |
5387 static const char *proc_stat_path = "/proc/%d/stat"; | |
5388 pid_t tid = thread->osthread()->thread_id(); | |
5389 char *s; | |
5390 char stat[2048]; | |
5391 int statlen; | |
5392 char proc_name[64]; | |
5393 int count; | |
5394 long sys_time, user_time; | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5395 char cdummy; |
0 | 5396 int idummy; |
5397 long ldummy; | |
5398 FILE *fp; | |
5399 | |
5400 // The /proc/<tid>/stat aggregates per-process usage on | |
5401 // new Linux kernels 2.6+ where NPTL is supported. | |
5402 // The /proc/self/task/<tid>/stat still has the per-thread usage. | |
5403 // See bug 6328462. | |
8099
4c1d8002ffb1
8004495: [parfait] False positive Buffer overflow in hotspot/src/os/linux/vm/os_linux.cpp
hseigel
parents:
8067
diff
changeset
|
5404 // There possibly can be cases where there is no directory |
4c1d8002ffb1
8004495: [parfait] False positive Buffer overflow in hotspot/src/os/linux/vm/os_linux.cpp
hseigel
parents:
8067
diff
changeset
|
5405 // /proc/self/task, so we check its availability. |
0 | 5406 if (proc_task_unchecked && os::Linux::is_NPTL()) { |
5407 // This is executed only once | |
5408 proc_task_unchecked = false; | |
5409 fp = fopen("/proc/self/task", "r"); | |
5410 if (fp != NULL) { | |
5411 proc_stat_path = "/proc/self/task/%d/stat"; | |
5412 fclose(fp); | |
5413 } | |
5414 } | |
5415 | |
5416 sprintf(proc_name, proc_stat_path, tid); | |
5417 fp = fopen(proc_name, "r"); | |
5418 if ( fp == NULL ) return -1; | |
5419 statlen = fread(stat, 1, 2047, fp); | |
5420 stat[statlen] = '\0'; | |
5421 fclose(fp); | |
5422 | |
5423 // Skip pid and the command string. Note that we could be dealing with | |
5424 // weird command names, e.g. user could decide to rename java launcher | |
5425 // to "java 1.4.2 :)", then the stat file would look like | |
5426 // 1234 (java 1.4.2 :)) R ... ... | |
5427 // We don't really need to know the command string, just find the last | |
5428 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
5429 s = strrchr(stat, ')'); | |
5430 if (s == NULL ) return -1; | |
5431 | |
5432 // Skip blank chars | |
5433 do s++; while (isspace(*s)); | |
5434 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5435 count = sscanf(s,"%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu", |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5436 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy, |
0 | 5437 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy, |
5438 &user_time, &sys_time); | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5439 if ( count != 13 ) return -1; |
0 | 5440 if (user_sys_cpu_time) { |
5441 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); | |
5442 } else { | |
5443 return (jlong)user_time * (1000000000 / clock_tics_per_sec); | |
5444 } | |
5445 } | |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
5446 PRAGMA_DIAG_POP |
0 | 5447 |
5448 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
5449 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
5450 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
5451 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
5452 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
5453 } | |
5454 | |
5455 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
5456 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
5457 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
5458 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
5459 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
5460 } | |
5461 | |
5462 bool os::is_thread_cpu_time_supported() { | |
5463 return true; | |
5464 } | |
5465 | |
5466 // System loadavg support. Returns -1 if load average cannot be obtained. | |
5467 // Linux doesn't yet have a (official) notion of processor sets, | |
5468 // so just return the system wide load average. | |
5469 int os::loadavg(double loadavg[], int nelem) { | |
5470 return ::getloadavg(loadavg, nelem); | |
5471 } | |
5472 | |
5473 void os::pause() { | |
5474 char filename[MAX_PATH]; | |
5475 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
5476 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
5477 } else { | |
5478 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
5479 } | |
5480 | |
5481 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
5482 if (fd != -1) { | |
5483 struct stat buf; | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5484 ::close(fd); |
0 | 5485 while (::stat(filename, &buf) == 0) { |
5486 (void)::poll(NULL, 0, 100); | |
5487 } | |
5488 } else { | |
5489 jio_fprintf(stderr, | |
5490 "Could not open pause file '%s', continuing immediately.\n", filename); | |
5491 } | |
5492 } | |
5493 | |
5494 | |
5495 // Refer to the comments in os_solaris.cpp park-unpark. | |
5496 // | |
5497 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can | |
5498 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. | |
5499 // For specifics regarding the bug see GLIBC BUGID 261237 : | |
5500 // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. | |
5501 // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future | |
5502 // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar | |
5503 // is used. (The simple C test-case provided in the GLIBC bug report manifests the | |
5504 // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() | |
5505 // and monitorenter when we're using 1-0 locking. All those operations may result in | |
5506 // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version | |
5507 // of libpthread avoids the problem, but isn't practical. | |
5508 // | |
5509 // Possible remedies: | |
5510 // | |
5511 // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. | |
5512 // This is palliative and probabilistic, however. If the thread is preempted | |
5513 // between the call to compute_abstime() and pthread_cond_timedwait(), more | |
5514 // than the minimum period may have passed, and the abstime may be stale (in the | |
5515 // past) resultin in a hang. Using this technique reduces the odds of a hang | |
5516 // but the JVM is still vulnerable, particularly on heavily loaded systems. | |
5517 // | |
5518 // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead | |
5519 // of the usual flag-condvar-mutex idiom. The write side of the pipe is set | |
5520 // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) | |
5521 // reduces to poll()+read(). This works well, but consumes 2 FDs per extant | |
5522 // thread. | |
5523 // | |
5524 // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread | |
5525 // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing | |
5526 // a timeout request to the chron thread and then blocking via pthread_cond_wait(). | |
5527 // This also works well. In fact it avoids kernel-level scalability impediments | |
5528 // on certain platforms that don't handle lots of active pthread_cond_timedwait() | |
5529 // timers in a graceful fashion. | |
5530 // | |
5531 // 4. When the abstime value is in the past it appears that control returns | |
5532 // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. | |
5533 // Subsequent timedwait/wait calls may hang indefinitely. Given that, we | |
5534 // can avoid the problem by reinitializing the condvar -- by cond_destroy() | |
5535 // followed by cond_init() -- after all calls to pthread_cond_timedwait(). | |
5536 // It may be possible to avoid reinitialization by checking the return | |
5537 // value from pthread_cond_timedwait(). In addition to reinitializing the | |
5538 // condvar we must establish the invariant that cond_signal() is only called | |
5539 // within critical sections protected by the adjunct mutex. This prevents | |
5540 // cond_signal() from "seeing" a condvar that's in the midst of being | |
5541 // reinitialized or that is corrupt. Sadly, this invariant obviates the | |
5542 // desirable signal-after-unlock optimization that avoids futile context switching. | |
5543 // | |
5544 // I'm also concerned that some versions of NTPL might allocate an auxilliary | |
5545 // structure when a condvar is used or initialized. cond_destroy() would | |
5546 // release the helper structure. Our reinitialize-after-timedwait fix | |
5547 // put excessive stress on malloc/free and locks protecting the c-heap. | |
5548 // | |
5549 // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. | |
5550 // It may be possible to refine (4) by checking the kernel and NTPL verisons | |
5551 // and only enabling the work-around for vulnerable environments. | |
5552 | |
5553 // utility to compute the abstime argument to timedwait: | |
5554 // millis is the relative timeout time | |
5555 // abstime will be the absolute timeout time | |
5556 // TODO: replace compute_abstime() with unpackTime() | |
5557 | |
5558 static struct timespec* compute_abstime(timespec* abstime, jlong millis) { | |
5559 if (millis < 0) millis = 0; | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5560 |
0 | 5561 jlong seconds = millis / 1000; |
5562 millis %= 1000; | |
5563 if (seconds > 50000000) { // see man cond_timedwait(3T) | |
5564 seconds = 50000000; | |
5565 } | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5566 |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5567 if (os::Linux::supports_monotonic_clock()) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5568 struct timespec now; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5569 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5570 assert_status(status == 0, status, "clock_gettime"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5571 abstime->tv_sec = now.tv_sec + seconds; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5572 long nanos = now.tv_nsec + millis * NANOSECS_PER_MILLISEC; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5573 if (nanos >= NANOSECS_PER_SEC) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5574 abstime->tv_sec += 1; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5575 nanos -= NANOSECS_PER_SEC; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5576 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5577 abstime->tv_nsec = nanos; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5578 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5579 struct timeval now; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5580 int status = gettimeofday(&now, NULL); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5581 assert(status == 0, "gettimeofday"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5582 abstime->tv_sec = now.tv_sec + seconds; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5583 long usec = now.tv_usec + millis * 1000; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5584 if (usec >= 1000000) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5585 abstime->tv_sec += 1; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5586 usec -= 1000000; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5587 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5588 abstime->tv_nsec = usec * 1000; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5589 } |
0 | 5590 return abstime; |
5591 } | |
5592 | |
5593 | |
5594 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
5595 // Conceptually TryPark() should be equivalent to park(0). | |
5596 | |
5597 int os::PlatformEvent::TryPark() { | |
5598 for (;;) { | |
5599 const int v = _Event ; | |
5600 guarantee ((v == 0) || (v == 1), "invariant") ; | |
5601 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
5602 } | |
5603 } | |
5604 | |
5605 void os::PlatformEvent::park() { // AKA "down()" | |
5606 // Invariant: Only the thread associated with the Event/PlatformEvent | |
5607 // may call park(). | |
5608 // TODO: assert that _Assoc != NULL or _Assoc == Self | |
5609 int v ; | |
5610 for (;;) { | |
5611 v = _Event ; | |
5612 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
5613 } | |
5614 guarantee (v >= 0, "invariant") ; | |
5615 if (v == 0) { | |
5616 // Do this the hard way by blocking ... | |
5617 int status = pthread_mutex_lock(_mutex); | |
5618 assert_status(status == 0, status, "mutex_lock"); | |
5619 guarantee (_nParked == 0, "invariant") ; | |
5620 ++ _nParked ; | |
5621 while (_Event < 0) { | |
5622 status = pthread_cond_wait(_cond, _mutex); | |
5623 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
5624 // Treat this the same as if the wait was interrupted | |
5625 if (status == ETIME) { status = EINTR; } | |
5626 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
5627 } | |
5628 -- _nParked ; | |
5629 | |
5630 _Event = 0 ; | |
5631 status = pthread_mutex_unlock(_mutex); | |
5632 assert_status(status == 0, status, "mutex_unlock"); | |
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5633 // Paranoia to ensure our locked and lock-free paths interact |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5634 // correctly with each other. |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5635 OrderAccess::fence(); |
0 | 5636 } |
5637 guarantee (_Event >= 0, "invariant") ; | |
5638 } | |
5639 | |
5640 int os::PlatformEvent::park(jlong millis) { | |
5641 guarantee (_nParked == 0, "invariant") ; | |
5642 | |
5643 int v ; | |
5644 for (;;) { | |
5645 v = _Event ; | |
5646 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
5647 } | |
5648 guarantee (v >= 0, "invariant") ; | |
5649 if (v != 0) return OS_OK ; | |
5650 | |
5651 // We do this the hard way, by blocking the thread. | |
5652 // Consider enforcing a minimum timeout value. | |
5653 struct timespec abst; | |
5654 compute_abstime(&abst, millis); | |
5655 | |
5656 int ret = OS_TIMEOUT; | |
5657 int status = pthread_mutex_lock(_mutex); | |
5658 assert_status(status == 0, status, "mutex_lock"); | |
5659 guarantee (_nParked == 0, "invariant") ; | |
5660 ++_nParked ; | |
5661 | |
5662 // Object.wait(timo) will return because of | |
5663 // (a) notification | |
5664 // (b) timeout | |
5665 // (c) thread.interrupt | |
5666 // | |
5667 // Thread.interrupt and object.notify{All} both call Event::set. | |
5668 // That is, we treat thread.interrupt as a special case of notification. | |
5669 // The underlying Solaris implementation, cond_timedwait, admits | |
5670 // spurious/premature wakeups, but the JLS/JVM spec prevents the | |
5671 // JVM from making those visible to Java code. As such, we must | |
5672 // filter out spurious wakeups. We assume all ETIME returns are valid. | |
5673 // | |
5674 // TODO: properly differentiate simultaneous notify+interrupt. | |
5675 // In that case, we should propagate the notify to another waiter. | |
5676 | |
5677 while (_Event < 0) { | |
5678 status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst); | |
5679 if (status != 0 && WorkAroundNPTLTimedWaitHang) { | |
5680 pthread_cond_destroy (_cond); | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5681 pthread_cond_init (_cond, os::Linux::condAttr()) ; |
0 | 5682 } |
5683 assert_status(status == 0 || status == EINTR || | |
5684 status == ETIME || status == ETIMEDOUT, | |
5685 status, "cond_timedwait"); | |
5686 if (!FilterSpuriousWakeups) break ; // previous semantics | |
5687 if (status == ETIME || status == ETIMEDOUT) break ; | |
5688 // We consume and ignore EINTR and spurious wakeups. | |
5689 } | |
5690 --_nParked ; | |
5691 if (_Event >= 0) { | |
5692 ret = OS_OK; | |
5693 } | |
5694 _Event = 0 ; | |
5695 status = pthread_mutex_unlock(_mutex); | |
5696 assert_status(status == 0, status, "mutex_unlock"); | |
5697 assert (_nParked == 0, "invariant") ; | |
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5698 // Paranoia to ensure our locked and lock-free paths interact |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5699 // correctly with each other. |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5700 OrderAccess::fence(); |
0 | 5701 return ret; |
5702 } | |
5703 | |
5704 void os::PlatformEvent::unpark() { | |
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5705 // Transitions for _Event: |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5706 // 0 :=> 1 |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5707 // 1 :=> 1 |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5708 // -1 :=> either 0 or 1; must signal target thread |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5709 // That is, we can safely transition _Event from -1 to either |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5710 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5711 // unpark() calls. |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5712 // See also: "Semaphores in Plan 9" by Mullender & Cox |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5713 // |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5714 // Note: Forcing a transition from "-1" to "1" on an unpark() means |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5715 // that it will take two back-to-back park() calls for the owning |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5716 // thread to block. This has the benefit of forcing a spurious return |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5717 // from the first park() call after an unpark() call which will help |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5718 // shake out uses of park() and unpark() without condition variables. |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5719 |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5720 if (Atomic::xchg(1, &_Event) >= 0) return; |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5721 |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5722 // Wait for the thread associated with the event to vacate |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5723 int status = pthread_mutex_lock(_mutex); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5724 assert_status(status == 0, status, "mutex_lock"); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5725 int AnyWaiters = _nParked; |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5726 assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5727 if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5728 AnyWaiters = 0; |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5729 pthread_cond_signal(_cond); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5730 } |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5731 status = pthread_mutex_unlock(_mutex); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5732 assert_status(status == 0, status, "mutex_unlock"); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5733 if (AnyWaiters != 0) { |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5734 status = pthread_cond_signal(_cond); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5735 assert_status(status == 0, status, "cond_signal"); |
0 | 5736 } |
5737 | |
5738 // Note that we signal() _after dropping the lock for "immortal" Events. | |
5739 // This is safe and avoids a common class of futile wakeups. In rare | |
5740 // circumstances this can cause a thread to return prematurely from | |
5741 // cond_{timed}wait() but the spurious wakeup is benign and the victim will | |
5742 // simply re-test the condition and re-park itself. | |
5743 } | |
5744 | |
5745 | |
5746 // JSR166 | |
5747 // ------------------------------------------------------- | |
5748 | |
5749 /* | |
5750 * The solaris and linux implementations of park/unpark are fairly | |
5751 * conservative for now, but can be improved. They currently use a | |
5752 * mutex/condvar pair, plus a a count. | |
5753 * Park decrements count if > 0, else does a condvar wait. Unpark | |
5754 * sets count to 1 and signals condvar. Only one thread ever waits | |
5755 * on the condvar. Contention seen when trying to park implies that someone | |
5756 * is unparking you, so don't wait. And spurious returns are fine, so there | |
5757 * is no need to track notifications. | |
5758 */ | |
5759 | |
5760 /* | |
5761 * This code is common to linux and solaris and will be moved to a | |
5762 * common place in dolphin. | |
5763 * | |
5764 * The passed in time value is either a relative time in nanoseconds | |
5765 * or an absolute time in milliseconds. Either way it has to be unpacked | |
5766 * into suitable seconds and nanoseconds components and stored in the | |
5767 * given timespec structure. | |
5768 * Given time is a 64-bit value and the time_t used in the timespec is only | |
5769 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
5770 * overflow if times way in the future are given. Further on Solaris versions | |
5771 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
5772 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
5773 * As it will be 28 years before "now + 100000000" will overflow we can | |
5774 * ignore overflow and just impose a hard-limit on seconds using the value | |
5775 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
5776 * years from "now". | |
5777 */ | |
5778 | |
5779 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
5780 assert (time > 0, "convertTime"); | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5781 time_t max_secs = 0; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5782 |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5783 if (!os::Linux::supports_monotonic_clock() || isAbsolute) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5784 struct timeval now; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5785 int status = gettimeofday(&now, NULL); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5786 assert(status == 0, "gettimeofday"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5787 |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5788 max_secs = now.tv_sec + MAX_SECS; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5789 |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5790 if (isAbsolute) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5791 jlong secs = time / 1000; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5792 if (secs > max_secs) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5793 absTime->tv_sec = max_secs; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5794 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5795 absTime->tv_sec = secs; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5796 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5797 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5798 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5799 jlong secs = time / NANOSECS_PER_SEC; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5800 if (secs >= MAX_SECS) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5801 absTime->tv_sec = max_secs; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5802 absTime->tv_nsec = 0; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5803 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5804 absTime->tv_sec = now.tv_sec + secs; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5805 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5806 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5807 absTime->tv_nsec -= NANOSECS_PER_SEC; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5808 ++absTime->tv_sec; // note: this must be <= max_secs |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5809 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5810 } |
0 | 5811 } |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5812 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5813 // must be relative using monotonic clock |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5814 struct timespec now; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5815 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5816 assert_status(status == 0, status, "clock_gettime"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5817 max_secs = now.tv_sec + MAX_SECS; |
0 | 5818 jlong secs = time / NANOSECS_PER_SEC; |
5819 if (secs >= MAX_SECS) { | |
5820 absTime->tv_sec = max_secs; | |
5821 absTime->tv_nsec = 0; | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5822 } else { |
0 | 5823 absTime->tv_sec = now.tv_sec + secs; |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5824 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_nsec; |
0 | 5825 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
5826 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
5827 ++absTime->tv_sec; // note: this must be <= max_secs | |
5828 } | |
5829 } | |
5830 } | |
5831 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
5832 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
5833 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
5834 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
5835 } | |
5836 | |
5837 void Parker::park(bool isAbsolute, jlong time) { | |
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5838 // Ideally we'd do something useful while spinning, such |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5839 // as calling unpackTime(). |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5840 |
0 | 5841 // Optional fast-path check: |
5842 // Return immediately if a permit is available. | |
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5843 // We depend on Atomic::xchg() having full barrier semantics |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5844 // since we are doing a lock-free update to _counter. |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5845 if (Atomic::xchg(0, &_counter) > 0) return; |
0 | 5846 |
5847 Thread* thread = Thread::current(); | |
5848 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
5849 JavaThread *jt = (JavaThread *)thread; | |
5850 | |
5851 // Optional optimization -- avoid state transitions if there's an interrupt pending. | |
5852 // Check interrupt before trying to wait | |
5853 if (Thread::is_interrupted(thread, false)) { | |
5854 return; | |
5855 } | |
5856 | |
5857 // Next, demultiplex/decode time arguments | |
5858 timespec absTime; | |
1865
1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
acorn
parents:
1750
diff
changeset
|
5859 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
0 | 5860 return; |
5861 } | |
5862 if (time > 0) { | |
5863 unpackTime(&absTime, isAbsolute, time); | |
5864 } | |
5865 | |
5866 | |
5867 // Enter safepoint region | |
5868 // Beware of deadlocks such as 6317397. | |
5869 // The per-thread Parker:: mutex is a classic leaf-lock. | |
5870 // In particular a thread must never block on the Threads_lock while | |
5871 // holding the Parker:: mutex. If safepoints are pending both the | |
5872 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
5873 ThreadBlockInVM tbivm(jt); | |
5874 | |
5875 // Don't wait if cannot get lock since interference arises from | |
5876 // unblocking. Also. check interrupt before trying wait | |
5877 if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { | |
5878 return; | |
5879 } | |
5880 | |
5881 int status ; | |
5882 if (_counter > 0) { // no wait needed | |
5883 _counter = 0; | |
5884 status = pthread_mutex_unlock(_mutex); | |
5885 assert (status == 0, "invariant") ; | |
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5886 // Paranoia to ensure our locked and lock-free paths interact |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5887 // correctly with each other and Java-level accesses. |
1117
95e9083cf4a7
6822370: ReentrantReadWriteLock: threads hung when there are no threads holding onto the lock (Netra x4450)
dholmes
parents:
1010
diff
changeset
|
5888 OrderAccess::fence(); |
0 | 5889 return; |
5890 } | |
5891 | |
5892 #ifdef ASSERT | |
5893 // Don't catch signals while blocked; let the running threads have the signals. | |
5894 // (This allows a debugger to break into the running thread.) | |
5895 sigset_t oldsigs; | |
5896 sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals(); | |
5897 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
5898 #endif | |
5899 | |
5900 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
5901 jt->set_suspend_equivalent(); | |
5902 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
5903 | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5904 assert(_cur_index == -1, "invariant"); |
0 | 5905 if (time == 0) { |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5906 _cur_index = REL_INDEX; // arbitrary choice when not timed |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5907 status = pthread_cond_wait (&_cond[_cur_index], _mutex) ; |
0 | 5908 } else { |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5909 _cur_index = isAbsolute ? ABS_INDEX : REL_INDEX; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5910 status = os::Linux::safe_cond_timedwait (&_cond[_cur_index], _mutex, &absTime) ; |
0 | 5911 if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5912 pthread_cond_destroy (&_cond[_cur_index]) ; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5913 pthread_cond_init (&_cond[_cur_index], isAbsolute ? NULL : os::Linux::condAttr()); |
0 | 5914 } |
5915 } | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5916 _cur_index = -1; |
0 | 5917 assert_status(status == 0 || status == EINTR || |
5918 status == ETIME || status == ETIMEDOUT, | |
5919 status, "cond_timedwait"); | |
5920 | |
5921 #ifdef ASSERT | |
5922 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); | |
5923 #endif | |
5924 | |
5925 _counter = 0 ; | |
5926 status = pthread_mutex_unlock(_mutex) ; | |
5927 assert_status(status == 0, status, "invariant") ; | |
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5928 // Paranoia to ensure our locked and lock-free paths interact |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5929 // correctly with each other and Java-level accesses. |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5930 OrderAccess::fence(); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5931 |
0 | 5932 // If externally suspended while waiting, re-suspend |
5933 if (jt->handle_special_suspend_equivalent_condition()) { | |
5934 jt->java_suspend_self(); | |
5935 } | |
5936 } | |
5937 | |
5938 void Parker::unpark() { | |
5939 int s, status ; | |
5940 status = pthread_mutex_lock(_mutex); | |
5941 assert (status == 0, "invariant") ; | |
5942 s = _counter; | |
5943 _counter = 1; | |
5944 if (s < 1) { | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5945 // thread might be parked |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5946 if (_cur_index != -1) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5947 // thread is definitely parked |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5948 if (WorkAroundNPTLTimedWaitHang) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5949 status = pthread_cond_signal (&_cond[_cur_index]); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5950 assert (status == 0, "invariant"); |
0 | 5951 status = pthread_mutex_unlock(_mutex); |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5952 assert (status == 0, "invariant"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5953 } else { |
0 | 5954 status = pthread_mutex_unlock(_mutex); |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5955 assert (status == 0, "invariant"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5956 status = pthread_cond_signal (&_cond[_cur_index]); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5957 assert (status == 0, "invariant"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5958 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5959 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5960 pthread_mutex_unlock(_mutex); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5961 assert (status == 0, "invariant") ; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5962 } |
0 | 5963 } else { |
5964 pthread_mutex_unlock(_mutex); | |
5965 assert (status == 0, "invariant") ; | |
5966 } | |
5967 } | |
5968 | |
5969 | |
5970 extern char** environ; | |
5971 | |
5972 #ifndef __NR_fork | |
5973 #define __NR_fork IA32_ONLY(2) IA64_ONLY(not defined) AMD64_ONLY(57) | |
5974 #endif | |
5975 | |
5976 #ifndef __NR_execve | |
5977 #define __NR_execve IA32_ONLY(11) IA64_ONLY(1033) AMD64_ONLY(59) | |
5978 #endif | |
5979 | |
5980 // Run the specified command in a separate process. Return its exit value, | |
5981 // or -1 on failure (e.g. can't fork a new process). | |
5982 // Unlike system(), this function can be called from signal handler. It | |
5983 // doesn't block SIGINT et al. | |
5984 int os::fork_and_exec(char* cmd) { | |
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
5985 const char * argv[4] = {"sh", "-c", cmd, NULL}; |
0 | 5986 |
5987 // fork() in LinuxThreads/NPTL is not async-safe. It needs to run | |
5988 // pthread_atfork handlers and reset pthread library. All we need is a | |
5989 // separate process to execve. Make a direct syscall to fork process. | |
5990 // On IA64 there's no fork syscall, we have to use fork() and hope for | |
5991 // the best... | |
5992 pid_t pid = NOT_IA64(syscall(__NR_fork);) | |
5993 IA64_ONLY(fork();) | |
5994 | |
5995 if (pid < 0) { | |
5996 // fork failed | |
5997 return -1; | |
5998 | |
5999 } else if (pid == 0) { | |
6000 // child process | |
6001 | |
6002 // execve() in LinuxThreads will call pthread_kill_other_threads_np() | |
6003 // first to kill every thread on the thread list. Because this list is | |
6004 // not reset by fork() (see notes above), execve() will instead kill | |
6005 // every thread in the parent process. We know this is the only thread | |
6006 // in the new process, so make a system call directly. | |
6007 // IA64 should use normal execve() from glibc to match the glibc fork() | |
6008 // above. | |
6009 NOT_IA64(syscall(__NR_execve, "/bin/sh", argv, environ);) | |
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
6010 IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);) |
0 | 6011 |
6012 // execve failed | |
6013 _exit(-1); | |
6014 | |
6015 } else { | |
6016 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
6017 // care about the actual exit code, for now. | |
6018 | |
6019 int status; | |
6020 | |
6021 // Wait for the child process to exit. This returns immediately if | |
6022 // the child has already exited. */ | |
6023 while (waitpid(pid, &status, 0) < 0) { | |
6024 switch (errno) { | |
6025 case ECHILD: return 0; | |
6026 case EINTR: break; | |
6027 default: return -1; | |
6028 } | |
6029 } | |
6030 | |
6031 if (WIFEXITED(status)) { | |
6032 // The child exited normally; get its exit code. | |
6033 return WEXITSTATUS(status); | |
6034 } else if (WIFSIGNALED(status)) { | |
6035 // The child exited because of a signal | |
6036 // The best value to return is 0x80 + signal number, | |
6037 // because that is what all Unix shells do, and because | |
6038 // it allows callers to distinguish between process exit and | |
6039 // process death by signal. | |
6040 return 0x80 + WTERMSIG(status); | |
6041 } else { | |
6042 // Unknown exit code; pass it through | |
6043 return status; | |
6044 } | |
6045 } | |
6046 } | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6047 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6048 // is_headless_jre() |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6049 // |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6050 // Test for the existence of xawt/libmawt.so or libawt_xawt.so |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6051 // in order to report if we are running in a headless jre |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6052 // |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6053 // Since JDK8 xawt/libmawt.so was moved into the same directory |
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6054 // as libawt.so, and renamed libawt_xawt.so |
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6055 // |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6056 bool os::is_headless_jre() { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6057 struct stat statbuf; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6058 char buf[MAXPATHLEN]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6059 char libmawtpath[MAXPATHLEN]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6060 const char *xawtstr = "/xawt/libmawt.so"; |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6061 const char *new_xawtstr = "/libawt_xawt.so"; |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6062 char *p; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6063 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6064 // Get path to libjvm.so |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6065 os::jvm_path(buf, sizeof(buf)); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6066 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6067 // Get rid of libjvm.so |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6068 p = strrchr(buf, '/'); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6069 if (p == NULL) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6070 else *p = '\0'; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6071 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6072 // Get rid of client or server |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6073 p = strrchr(buf, '/'); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6074 if (p == NULL) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6075 else *p = '\0'; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6076 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6077 // check xawt/libmawt.so |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6078 strcpy(libmawtpath, buf); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6079 strcat(libmawtpath, xawtstr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6080 if (::stat(libmawtpath, &statbuf) == 0) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6081 |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6082 // check libawt_xawt.so |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6083 strcpy(libmawtpath, buf); |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6084 strcat(libmawtpath, new_xawtstr); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6085 if (::stat(libmawtpath, &statbuf) == 0) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6086 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6087 return true; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6088 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6089 |
6200
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6090 // Get the default path to the core file |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6091 // Returns the length of the string |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6092 int os::get_core_path(char* buffer, size_t bufferSize) { |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6093 const char* p = get_current_directory(buffer, bufferSize); |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6094 |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6095 if (p == NULL) { |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6096 assert(p != NULL, "failed to get current directory"); |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6097 return 0; |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6098 } |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6099 |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6100 return strlen(buffer); |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6101 } |
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6102 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6103 #ifdef JAVASE_EMBEDDED |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6104 // |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6105 // A thread to watch the '/dev/mem_notify' device, which will tell us when the OS is running low on memory. |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6106 // |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6107 MemNotifyThread* MemNotifyThread::_memnotify_thread = NULL; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6108 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6109 // ctor |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6110 // |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6111 MemNotifyThread::MemNotifyThread(int fd): Thread() { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6112 assert(memnotify_thread() == NULL, "we can only allocate one MemNotifyThread"); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6113 _fd = fd; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6114 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6115 if (os::create_thread(this, os::os_thread)) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6116 _memnotify_thread = this; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6117 os::set_priority(this, NearMaxPriority); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6118 os::start_thread(this); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6119 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6120 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6121 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6122 // Where all the work gets done |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6123 // |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6124 void MemNotifyThread::run() { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6125 assert(this == memnotify_thread(), "expected the singleton MemNotifyThread"); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6126 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6127 // Set up the select arguments |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6128 fd_set rfds; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6129 if (_fd != -1) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6130 FD_ZERO(&rfds); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6131 FD_SET(_fd, &rfds); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6132 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6133 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6134 // Now wait for the mem_notify device to wake up |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6135 while (1) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6136 // Wait for the mem_notify device to signal us.. |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6137 int rc = select(_fd+1, _fd != -1 ? &rfds : NULL, NULL, NULL, NULL); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6138 if (rc == -1) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6139 perror("select!\n"); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6140 break; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6141 } else if (rc) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6142 //ssize_t free_before = os::available_memory(); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6143 //tty->print ("Notified: Free: %dK \n",os::available_memory()/1024); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6144 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6145 // The kernel is telling us there is not much memory left... |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6146 // try to do something about that |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6147 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6148 // If we are not already in a GC, try one. |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6149 if (!Universe::heap()->is_gc_active()) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6150 Universe::heap()->collect(GCCause::_allocation_failure); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6151 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6152 //ssize_t free_after = os::available_memory(); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6153 //tty->print ("Post-Notify: Free: %dK\n",free_after/1024); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6154 //tty->print ("GC freed: %dK\n", (free_after - free_before)/1024); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6155 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6156 // We might want to do something like the following if we find the GC's are not helping... |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6157 // Universe::heap()->size_policy()->set_gc_time_limit_exceeded(true); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6158 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6159 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6160 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6161 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6162 // |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6163 // See if the /dev/mem_notify device exists, and if so, start a thread to monitor it. |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6164 // |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6165 void MemNotifyThread::start() { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6166 int fd; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6167 fd = open ("/dev/mem_notify", O_RDONLY, 0); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6168 if (fd < 0) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6169 return; |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6170 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6171 |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6172 if (memnotify_thread() == NULL) { |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6173 new MemNotifyThread(fd); |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6174 } |
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6175 } |
10405 | 6176 |
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6177 #endif // JAVASE_EMBEDDED |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6178 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6179 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6180 /////////////// Unit tests /////////////// |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6181 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6182 #ifndef PRODUCT |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6183 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6184 #define test_log(...) \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6185 do {\ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6186 if (VerboseInternalVMTests) { \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6187 tty->print_cr(__VA_ARGS__); \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6188 tty->flush(); \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6189 }\ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6190 } while (false) |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6191 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6192 class TestReserveMemorySpecial : AllStatic { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6193 public: |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6194 static void small_page_write(void* addr, size_t size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6195 size_t page_size = os::vm_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6196 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6197 char* end = (char*)addr + size; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6198 for (char* p = (char*)addr; p < end; p += page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6199 *p = 1; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6200 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6201 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6202 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6203 static void test_reserve_memory_special_huge_tlbfs_only(size_t size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6204 if (!UseHugeTLBFS) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6205 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6206 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6207 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6208 test_log("test_reserve_memory_special_huge_tlbfs_only(" SIZE_FORMAT ")", size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6209 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6210 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_only(size, NULL, false); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6211 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6212 if (addr != NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6213 small_page_write(addr, size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6214 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6215 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6216 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6217 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6218 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6219 static void test_reserve_memory_special_huge_tlbfs_only() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6220 if (!UseHugeTLBFS) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6221 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6222 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6223 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6224 size_t lp = os::large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6225 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6226 for (size_t size = lp; size <= lp * 10; size += lp) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6227 test_reserve_memory_special_huge_tlbfs_only(size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6228 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6229 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6230 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6231 static void test_reserve_memory_special_huge_tlbfs_mixed(size_t size, size_t alignment) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6232 if (!UseHugeTLBFS) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6233 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6234 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6235 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6236 test_log("test_reserve_memory_special_huge_tlbfs_mixed(" SIZE_FORMAT ", " SIZE_FORMAT ")", |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6237 size, alignment); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6238 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6239 assert(size >= os::large_page_size(), "Incorrect input to test"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6240 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6241 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, NULL, false); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6242 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6243 if (addr != NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6244 small_page_write(addr, size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6245 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6246 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6247 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6248 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6249 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6250 static void test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(size_t size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6251 size_t lp = os::large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6252 size_t ag = os::vm_allocation_granularity(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6253 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6254 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6255 test_reserve_memory_special_huge_tlbfs_mixed(size, alignment); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6256 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6257 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6258 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6259 static void test_reserve_memory_special_huge_tlbfs_mixed() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6260 size_t lp = os::large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6261 size_t ag = os::vm_allocation_granularity(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6262 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6263 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6264 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp + ag); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6265 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp + lp / 2); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6266 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6267 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 + ag); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6268 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 - ag); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6269 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 + lp / 2); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6270 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 10); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6271 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 10 + lp / 2); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6272 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6273 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6274 static void test_reserve_memory_special_huge_tlbfs() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6275 if (!UseHugeTLBFS) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6276 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6277 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6278 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6279 test_reserve_memory_special_huge_tlbfs_only(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6280 test_reserve_memory_special_huge_tlbfs_mixed(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6281 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6282 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6283 static void test_reserve_memory_special_shm(size_t size, size_t alignment) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6284 if (!UseSHM) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6285 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6286 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6287 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6288 test_log("test_reserve_memory_special_shm(" SIZE_FORMAT ", " SIZE_FORMAT ")", size, alignment); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6289 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6290 char* addr = os::Linux::reserve_memory_special_shm(size, alignment, NULL, false); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6291 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6292 if (addr != NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6293 assert(is_ptr_aligned(addr, alignment), "Check"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6294 assert(is_ptr_aligned(addr, os::large_page_size()), "Check"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6295 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6296 small_page_write(addr, size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6297 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6298 os::Linux::release_memory_special_shm(addr, size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6299 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6300 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6301 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6302 static void test_reserve_memory_special_shm() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6303 size_t lp = os::large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6304 size_t ag = os::vm_allocation_granularity(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6305 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6306 for (size_t size = ag; size < lp * 3; size += ag) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6307 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6308 test_reserve_memory_special_shm(size, alignment); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6309 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6310 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6311 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6312 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6313 static void test() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6314 test_reserve_memory_special_huge_tlbfs(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6315 test_reserve_memory_special_shm(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6316 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6317 }; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6318 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6319 void TestReserveMemorySpecial_test() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6320 TestReserveMemorySpecial::test(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6321 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6322 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6323 #endif |