Mercurial > hg > graal-jvmci-8
annotate src/os/linux/vm/os_linux.cpp @ 9062:8be1318fbe77
Merge
| author | dcubed |
|---|---|
| date | Fri, 05 Apr 2013 10:38:08 -0700 |
| parents | 15c04fe93c18 cc32ccaaf47f |
| children | 89e4d67fdd2a f32b6c267d2e e12c9b3740db |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
2 * Copyright (c) 1999, 2013, 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" | |
| 52 #include "runtime/osThread.hpp" | |
| 53 #include "runtime/perfMemory.hpp" | |
| 54 #include "runtime/sharedRuntime.hpp" | |
| 55 #include "runtime/statSampler.hpp" | |
| 56 #include "runtime/stubRoutines.hpp" | |
|
7180
f34d701e952e
8003935: Simplify the needed includes for using Thread::current()
stefank
parents:
6966
diff
changeset
|
57 #include "runtime/thread.inline.hpp" |
| 1972 | 58 #include "runtime/threadCritical.hpp" |
| 59 #include "runtime/timer.hpp" | |
| 60 #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
|
61 #include "services/memTracker.hpp" |
| 1972 | 62 #include "services/runtimeService.hpp" |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
63 #include "utilities/decoder.hpp" |
| 1972 | 64 #include "utilities/defaultStream.hpp" |
| 65 #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
|
66 #include "utilities/elfFile.hpp" |
| 1972 | 67 #include "utilities/growableArray.hpp" |
| 68 #include "utilities/vmError.hpp" | |
| 0 | 69 |
| 70 // put OS-includes here | |
| 71 # include <sys/types.h> | |
| 72 # include <sys/mman.h> | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
73 # include <sys/stat.h> |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
74 # include <sys/select.h> |
| 0 | 75 # include <pthread.h> |
| 76 # include <signal.h> | |
| 77 # include <errno.h> | |
| 78 # include <dlfcn.h> | |
| 79 # include <stdio.h> | |
| 80 # include <unistd.h> | |
| 81 # include <sys/resource.h> | |
| 82 # include <pthread.h> | |
| 83 # include <sys/stat.h> | |
| 84 # include <sys/time.h> | |
| 85 # include <sys/times.h> | |
| 86 # include <sys/utsname.h> | |
| 87 # include <sys/socket.h> | |
| 88 # include <sys/wait.h> | |
| 89 # include <pwd.h> | |
| 90 # include <poll.h> | |
| 91 # include <semaphore.h> | |
| 92 # include <fcntl.h> | |
| 93 # include <string.h> | |
| 94 # include <syscall.h> | |
| 95 # include <sys/sysinfo.h> | |
| 96 # include <gnu/libc-version.h> | |
| 97 # include <sys/ipc.h> | |
| 98 # include <sys/shm.h> | |
| 99 # include <link.h> | |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
100 # include <stdint.h> |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
101 # include <inttypes.h> |
|
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
102 # include <sys/ioctl.h> |
| 0 | 103 |
| 104 #define MAX_PATH (2 * K) | |
| 105 | |
| 106 // for timer info max values which include all bits | |
| 107 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
| 108 | |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
109 #define LARGEPAGES_BIT (1 << 6) |
| 0 | 110 //////////////////////////////////////////////////////////////////////////////// |
| 111 // global variables | |
| 112 julong os::Linux::_physical_memory = 0; | |
| 113 | |
| 114 address os::Linux::_initial_thread_stack_bottom = NULL; | |
| 115 uintptr_t os::Linux::_initial_thread_stack_size = 0; | |
| 116 | |
| 117 int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL; | |
| 118 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL; | |
| 119 Mutex* os::Linux::_createThread_lock = NULL; | |
| 120 pthread_t os::Linux::_main_thread; | |
| 121 int os::Linux::_page_size = -1; | |
| 122 bool os::Linux::_is_floating_stack = false; | |
| 123 bool os::Linux::_is_NPTL = false; | |
| 124 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
|
125 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
|
126 const char * os::Linux::_libpthread_version = NULL; |
| 0 | 127 |
| 128 static jlong initial_time_count=0; | |
| 129 | |
| 130 static int clock_tics_per_sec = 100; | |
| 131 | |
| 132 // For diagnostics to print a message once. see run_periodic_checks | |
| 133 static sigset_t check_signal_done; | |
| 134 static bool check_signals = true;; | |
| 135 | |
| 136 static pid_t _initial_pid = 0; | |
| 137 | |
| 138 /* Signal number used to suspend/resume a thread */ | |
| 139 | |
| 140 /* do not use any signal number less than SIGSEGV, see 4355769 */ | |
| 141 static int SR_signum = SIGUSR2; | |
| 142 sigset_t SR_sigset; | |
| 143 | |
| 242 | 144 /* Used to protect dlsym() calls */ |
| 145 static pthread_mutex_t dl_mutex; | |
| 146 | |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
147 #ifdef JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
148 class MemNotifyThread: public Thread { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
149 friend class VMStructs; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
150 public: |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
151 virtual void run(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
152 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
153 private: |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
154 static MemNotifyThread* _memnotify_thread; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
155 int _fd; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
156 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
157 public: |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
158 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
159 // Constructor |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
160 MemNotifyThread(int fd); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
161 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
162 // Tester |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
163 bool is_memnotify_thread() const { return true; } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
164 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
165 // Printing |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
166 char* name() const { return (char*)"Linux MemNotify Thread"; } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
167 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
168 // Returns the single instance of the MemNotifyThread |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
169 static MemNotifyThread* memnotify_thread() { return _memnotify_thread; } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
170 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
171 // Create and start the single instance of MemNotifyThread |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
172 static void start(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
173 }; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
174 #endif // JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
175 |
| 0 | 176 // utility functions |
| 177 | |
| 178 static int SR_initialize(); | |
| 179 | |
| 180 julong os::available_memory() { | |
| 181 return Linux::available_memory(); | |
| 182 } | |
| 183 | |
| 184 julong os::Linux::available_memory() { | |
| 185 // values in struct sysinfo are "unsigned long" | |
| 186 struct sysinfo si; | |
| 187 sysinfo(&si); | |
| 188 | |
| 189 return (julong)si.freeram * si.mem_unit; | |
| 190 } | |
| 191 | |
| 192 julong os::physical_memory() { | |
| 193 return Linux::physical_memory(); | |
| 194 } | |
| 195 | |
| 196 //////////////////////////////////////////////////////////////////////////////// | |
| 197 // environment support | |
| 198 | |
| 199 bool os::getenv(const char* name, char* buf, int len) { | |
| 200 const char* val = ::getenv(name); | |
| 201 if (val != NULL && strlen(val) < (size_t)len) { | |
| 202 strcpy(buf, val); | |
| 203 return true; | |
| 204 } | |
| 205 if (len > 0) buf[0] = 0; // return a null string | |
| 206 return false; | |
| 207 } | |
| 208 | |
| 209 | |
| 210 // Return true if user is running as root. | |
| 211 | |
| 212 bool os::have_special_privileges() { | |
| 213 static bool init = false; | |
| 214 static bool privileges = false; | |
| 215 if (!init) { | |
| 216 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
| 217 init = true; | |
| 218 } | |
| 219 return privileges; | |
| 220 } | |
| 221 | |
| 222 | |
| 223 #ifndef SYS_gettid | |
| 224 // i386: 224, ia64: 1105, amd64: 186, sparc 143 | |
| 225 #ifdef __ia64__ | |
| 226 #define SYS_gettid 1105 | |
| 227 #elif __i386__ | |
| 228 #define SYS_gettid 224 | |
| 229 #elif __amd64__ | |
| 230 #define SYS_gettid 186 | |
| 231 #elif __sparc__ | |
| 232 #define SYS_gettid 143 | |
| 233 #else | |
| 234 #error define gettid for the arch | |
| 235 #endif | |
| 236 #endif | |
| 237 | |
| 238 // Cpu architecture string | |
| 1010 | 239 #if defined(ZERO) |
| 240 static char cpu_arch[] = ZERO_LIBARCH; | |
| 241 #elif defined(IA64) | |
| 0 | 242 static char cpu_arch[] = "ia64"; |
| 243 #elif defined(IA32) | |
| 244 static char cpu_arch[] = "i386"; | |
| 245 #elif defined(AMD64) | |
| 246 static char cpu_arch[] = "amd64"; | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
247 #elif defined(ARM) |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
248 static char cpu_arch[] = "arm"; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
249 #elif defined(PPC) |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
250 static char cpu_arch[] = "ppc"; |
| 0 | 251 #elif defined(SPARC) |
| 252 # ifdef _LP64 | |
| 253 static char cpu_arch[] = "sparcv9"; | |
| 254 # else | |
| 255 static char cpu_arch[] = "sparc"; | |
| 256 # endif | |
| 257 #else | |
| 258 #error Add appropriate cpu_arch setting | |
| 259 #endif | |
| 260 | |
| 261 | |
| 262 // pid_t gettid() | |
| 263 // | |
| 264 // Returns the kernel thread id of the currently running thread. Kernel | |
| 265 // thread id is used to access /proc. | |
| 266 // | |
| 267 // (Note that getpid() on LinuxThreads returns kernel thread id too; but | |
| 268 // on NPTL, it returns the same pid for all threads, as required by POSIX.) | |
| 269 // | |
| 270 pid_t os::Linux::gettid() { | |
| 271 int rslt = syscall(SYS_gettid); | |
| 272 if (rslt == -1) { | |
| 273 // old kernel, no NPTL support | |
| 274 return getpid(); | |
| 275 } else { | |
| 276 return (pid_t)rslt; | |
| 277 } | |
| 278 } | |
| 279 | |
| 280 // Most versions of linux have a bug where the number of processors are | |
| 281 // determined by looking at the /proc file system. In a chroot environment, | |
| 282 // the system call returns 1. This causes the VM to act as if it is | |
| 283 // a single processor and elide locking (see is_MP() call). | |
| 284 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
|
285 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
|
286 "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
|
287 "environment on Linux when /proc filesystem is not mounted."; |
| 0 | 288 |
| 289 void os::Linux::initialize_system_info() { | |
|
1123
167c2986d91b
6843629: Make current hotspot build part of jdk5 control build
phh
parents:
1117
diff
changeset
|
290 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); |
|
167c2986d91b
6843629: Make current hotspot build part of jdk5 control build
phh
parents:
1117
diff
changeset
|
291 if (processor_count() == 1) { |
| 0 | 292 pid_t pid = os::Linux::gettid(); |
| 293 char fname[32]; | |
| 294 jio_snprintf(fname, sizeof(fname), "/proc/%d", pid); | |
| 295 FILE *fp = fopen(fname, "r"); | |
| 296 if (fp == NULL) { | |
| 297 unsafe_chroot_detected = true; | |
| 298 } else { | |
| 299 fclose(fp); | |
| 300 } | |
| 301 } | |
| 302 _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
|
303 assert(processor_count() > 0, "linux error"); |
| 0 | 304 } |
| 305 | |
| 306 void os::init_system_properties_values() { | |
| 307 // char arch[12]; | |
| 308 // sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); | |
| 309 | |
| 310 // The next steps are taken in the product version: | |
| 311 // | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
312 // Obtain the JAVA_HOME value from the location of libjvm.so. |
| 0 | 313 // This library should be located at: |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
314 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
| 0 | 315 // |
| 316 // 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
|
317 // assume libjvm.so is installed in a JDK and we use this path. |
| 0 | 318 // |
| 319 // Otherwise exit with message: "Could not create the Java virtual machine." | |
| 320 // | |
| 321 // The following extra steps are taken in the debugging version: | |
| 322 // | |
| 323 // If "/jre/lib/" does NOT appear at the right place in the path | |
| 324 // instead of exit check for $JAVA_HOME environment variable. | |
| 325 // | |
| 326 // 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
|
327 // 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
|
328 // it looks like libjvm.so is installed there |
|
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
329 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
| 0 | 330 // |
| 331 // Otherwise exit. | |
| 332 // | |
| 333 // Important note: if the location of libjvm.so changes this | |
| 334 // code needs to be changed accordingly. | |
| 335 | |
| 336 // The next few definitions allow the code to be verbatim: | |
| 6197 | 337 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) |
| 0 | 338 #define getenv(n) ::getenv(n) |
| 339 | |
| 340 /* | |
| 341 * See ld(1): | |
| 342 * The linker uses the following search paths to locate required | |
| 343 * shared libraries: | |
| 344 * 1: ... | |
| 345 * ... | |
| 346 * 7: The default directories, normally /lib and /usr/lib. | |
| 347 */ | |
|
509
9656bebe85a7
6778662: fixes 64-bits libraries directory search paths on linux
kvn
parents:
477
diff
changeset
|
348 #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
|
349 #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
|
350 #else |
| 0 | 351 #define DEFAULT_LIBPATH "/lib:/usr/lib" |
|
509
9656bebe85a7
6778662: fixes 64-bits libraries directory search paths on linux
kvn
parents:
477
diff
changeset
|
352 #endif |
| 0 | 353 |
| 354 #define EXTENSIONS_DIR "/lib/ext" | |
| 355 #define ENDORSED_DIR "/lib/endorsed" | |
| 356 #define REG_DIR "/usr/java/packages" | |
| 357 | |
| 358 { | |
| 359 /* sysclasspath, java_home, dll_dir */ | |
| 360 { | |
| 361 char *home_path; | |
| 362 char *dll_path; | |
| 363 char *pslash; | |
| 364 char buf[MAXPATHLEN]; | |
| 365 os::jvm_path(buf, sizeof(buf)); | |
| 366 | |
| 367 // Found the full path to libjvm.so. | |
| 368 // Now cut the path to <java_home>/jre if we can. | |
| 369 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ | |
| 370 pslash = strrchr(buf, '/'); | |
| 371 if (pslash != NULL) | |
| 372 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ | |
| 373 dll_path = malloc(strlen(buf) + 1); | |
| 374 if (dll_path == NULL) | |
| 375 return; | |
| 376 strcpy(dll_path, buf); | |
| 377 Arguments::set_dll_dir(dll_path); | |
| 378 | |
| 379 if (pslash != NULL) { | |
| 380 pslash = strrchr(buf, '/'); | |
| 381 if (pslash != NULL) { | |
| 382 *pslash = '\0'; /* get rid of /<arch> */ | |
| 383 pslash = strrchr(buf, '/'); | |
| 384 if (pslash != NULL) | |
| 385 *pslash = '\0'; /* get rid of /lib */ | |
| 386 } | |
| 387 } | |
| 388 | |
| 389 home_path = malloc(strlen(buf) + 1); | |
| 390 if (home_path == NULL) | |
| 391 return; | |
| 392 strcpy(home_path, buf); | |
| 393 Arguments::set_java_home(home_path); | |
| 394 | |
| 395 if (!set_boot_path('/', ':')) | |
| 396 return; | |
| 397 } | |
| 398 | |
| 399 /* | |
| 400 * Where to look for native libraries | |
| 401 * | |
| 402 * Note: Due to a legacy implementation, most of the library path | |
| 403 * is set in the launcher. This was to accomodate linking restrictions | |
| 404 * on legacy Linux implementations (which are no longer supported). | |
| 405 * Eventually, all the library path setting will be done here. | |
| 406 * | |
| 407 * However, to prevent the proliferation of improperly built native | |
| 408 * libraries, the new path component /usr/java/packages is added here. | |
| 409 * Eventually, all the library path setting will be done here. | |
| 410 */ | |
| 411 { | |
| 412 char *ld_library_path; | |
| 413 | |
| 414 /* | |
| 415 * Construct the invariant part of ld_library_path. Note that the | |
| 416 * space for the colon and the trailing null are provided by the | |
| 417 * nulls included by the sizeof operator (so actually we allocate | |
| 418 * a byte more than necessary). | |
| 419 */ | |
| 420 ld_library_path = (char *) malloc(sizeof(REG_DIR) + sizeof("/lib/") + | |
| 421 strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH)); | |
| 422 sprintf(ld_library_path, REG_DIR "/lib/%s:" DEFAULT_LIBPATH, cpu_arch); | |
| 423 | |
| 424 /* | |
| 425 * Get the user setting of LD_LIBRARY_PATH, and prepended it. It | |
| 426 * should always exist (until the legacy problem cited above is | |
| 427 * addressed). | |
| 428 */ | |
| 429 char *v = getenv("LD_LIBRARY_PATH"); | |
| 430 if (v != NULL) { | |
| 431 char *t = ld_library_path; | |
| 432 /* That's +1 for the colon and +1 for the trailing '\0' */ | |
| 433 ld_library_path = (char *) malloc(strlen(v) + 1 + strlen(t) + 1); | |
| 434 sprintf(ld_library_path, "%s:%s", v, t); | |
| 435 } | |
| 436 Arguments::set_library_path(ld_library_path); | |
| 437 } | |
| 438 | |
| 439 /* | |
| 440 * Extensions directories. | |
| 441 * | |
| 442 * Note that the space for the colon and the trailing null are provided | |
| 443 * by the nulls included by the sizeof operator (so actually one byte more | |
| 444 * than necessary is allocated). | |
| 445 */ | |
| 446 { | |
| 447 char *buf = malloc(strlen(Arguments::get_java_home()) + | |
| 448 sizeof(EXTENSIONS_DIR) + sizeof(REG_DIR) + sizeof(EXTENSIONS_DIR)); | |
| 449 sprintf(buf, "%s" EXTENSIONS_DIR ":" REG_DIR EXTENSIONS_DIR, | |
| 450 Arguments::get_java_home()); | |
| 451 Arguments::set_ext_dirs(buf); | |
| 452 } | |
| 453 | |
| 454 /* Endorsed standards default directory. */ | |
| 455 { | |
| 456 char * buf; | |
| 457 buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); | |
| 458 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); | |
| 459 Arguments::set_endorsed_dirs(buf); | |
| 460 } | |
| 461 } | |
| 462 | |
| 463 #undef malloc | |
| 464 #undef getenv | |
| 465 #undef EXTENSIONS_DIR | |
| 466 #undef ENDORSED_DIR | |
| 467 | |
| 468 // Done | |
| 469 return; | |
| 470 } | |
| 471 | |
| 472 //////////////////////////////////////////////////////////////////////////////// | |
| 473 // breakpoint support | |
| 474 | |
| 475 void os::breakpoint() { | |
| 476 BREAKPOINT; | |
| 477 } | |
| 478 | |
| 479 extern "C" void breakpoint() { | |
| 480 // use debugger to set breakpoint here | |
| 481 } | |
| 482 | |
| 483 //////////////////////////////////////////////////////////////////////////////// | |
| 484 // signal support | |
| 485 | |
| 486 debug_only(static bool signal_sets_initialized = false); | |
| 487 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
| 488 | |
| 489 bool os::Linux::is_sig_ignored(int sig) { | |
| 490 struct sigaction oact; | |
| 491 sigaction(sig, (struct sigaction*)NULL, &oact); | |
| 492 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
| 493 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
| 494 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
| 495 return true; | |
| 496 else | |
| 497 return false; | |
| 498 } | |
| 499 | |
| 500 void os::Linux::signal_sets_init() { | |
| 501 // Should also have an assertion stating we are still single-threaded. | |
| 502 assert(!signal_sets_initialized, "Already initialized"); | |
| 503 // Fill in signals that are necessarily unblocked for all threads in | |
| 504 // the VM. Currently, we unblock the following signals: | |
| 505 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
| 506 // by -Xrs (=ReduceSignalUsage)); | |
| 507 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
| 508 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
| 509 // the dispositions or masks wrt these signals. | |
| 510 // Programs embedding the VM that want to use the above signals for their | |
| 511 // own purposes must, at this time, use the "-Xrs" option to prevent | |
| 512 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
| 513 // (See bug 4345157, and other related bugs). | |
| 514 // In reality, though, unblocking these signals is really a nop, since | |
| 515 // these signals are not blocked by default. | |
| 516 sigemptyset(&unblocked_sigs); | |
| 517 sigemptyset(&allowdebug_blocked_sigs); | |
| 518 sigaddset(&unblocked_sigs, SIGILL); | |
| 519 sigaddset(&unblocked_sigs, SIGSEGV); | |
| 520 sigaddset(&unblocked_sigs, SIGBUS); | |
| 521 sigaddset(&unblocked_sigs, SIGFPE); | |
| 522 sigaddset(&unblocked_sigs, SR_signum); | |
| 523 | |
| 524 if (!ReduceSignalUsage) { | |
| 525 if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
| 526 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
| 527 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
| 528 } | |
| 529 if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
| 530 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
| 531 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
| 532 } | |
| 533 if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
| 534 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
| 535 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
| 536 } | |
| 537 } | |
| 538 // Fill in signals that are blocked by all but the VM thread. | |
| 539 sigemptyset(&vm_sigs); | |
| 540 if (!ReduceSignalUsage) | |
| 541 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
| 542 debug_only(signal_sets_initialized = true); | |
| 543 | |
| 544 } | |
| 545 | |
| 546 // These are signals that are unblocked while a thread is running Java. | |
| 547 // (For some reason, they get blocked by default.) | |
| 548 sigset_t* os::Linux::unblocked_signals() { | |
| 549 assert(signal_sets_initialized, "Not initialized"); | |
| 550 return &unblocked_sigs; | |
| 551 } | |
| 552 | |
| 553 // These are the signals that are blocked while a (non-VM) thread is | |
| 554 // running Java. Only the VM thread handles these signals. | |
| 555 sigset_t* os::Linux::vm_signals() { | |
| 556 assert(signal_sets_initialized, "Not initialized"); | |
| 557 return &vm_sigs; | |
| 558 } | |
| 559 | |
| 560 // These are signals that are blocked during cond_wait to allow debugger in | |
| 561 sigset_t* os::Linux::allowdebug_blocked_signals() { | |
| 562 assert(signal_sets_initialized, "Not initialized"); | |
| 563 return &allowdebug_blocked_sigs; | |
| 564 } | |
| 565 | |
| 566 void os::Linux::hotspot_sigmask(Thread* thread) { | |
| 567 | |
| 568 //Save caller's signal mask before setting VM signal mask | |
| 569 sigset_t caller_sigmask; | |
| 570 pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); | |
| 571 | |
| 572 OSThread* osthread = thread->osthread(); | |
| 573 osthread->set_caller_sigmask(caller_sigmask); | |
| 574 | |
| 575 pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL); | |
| 576 | |
| 577 if (!ReduceSignalUsage) { | |
| 578 if (thread->is_VM_thread()) { | |
| 579 // Only the VM thread handles BREAK_SIGNAL ... | |
| 580 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); | |
| 581 } else { | |
| 582 // ... all other threads block BREAK_SIGNAL | |
| 583 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); | |
| 584 } | |
| 585 } | |
| 586 } | |
| 587 | |
| 588 ////////////////////////////////////////////////////////////////////////////// | |
| 589 // detecting pthread library | |
| 590 | |
| 591 void os::Linux::libpthread_init() { | |
| 592 // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION | |
| 593 // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a | |
| 594 // generic name for earlier versions. | |
| 595 // Define macros here so we can build HotSpot on old systems. | |
| 596 # ifndef _CS_GNU_LIBC_VERSION | |
| 597 # define _CS_GNU_LIBC_VERSION 2 | |
| 598 # endif | |
| 599 # ifndef _CS_GNU_LIBPTHREAD_VERSION | |
| 600 # define _CS_GNU_LIBPTHREAD_VERSION 3 | |
| 601 # endif | |
| 602 | |
| 603 size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0); | |
| 604 if (n > 0) { | |
| 6197 | 605 char *str = (char *)malloc(n, mtInternal); |
| 0 | 606 confstr(_CS_GNU_LIBC_VERSION, str, n); |
| 607 os::Linux::set_glibc_version(str); | |
| 608 } else { | |
| 609 // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() | |
| 610 static char _gnu_libc_version[32]; | |
| 611 jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), | |
| 612 "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); | |
| 613 os::Linux::set_glibc_version(_gnu_libc_version); | |
| 614 } | |
| 615 | |
| 616 n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0); | |
| 617 if (n > 0) { | |
| 6197 | 618 char *str = (char *)malloc(n, mtInternal); |
| 0 | 619 confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n); |
| 620 // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells | |
| 621 // 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
|
622 // 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
|
623 // 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
|
624 // 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
|
625 // will return -1 and errno is not changed. Check if it is really NPTL. |
| 0 | 626 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
|
627 strstr(str, "NPTL") && |
|
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
628 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
|
629 free(str); |
|
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
630 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
|
631 } else { |
|
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
632 os::Linux::set_libpthread_version(str); |
| 0 | 633 } |
| 634 } else { | |
|
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
635 // 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
|
636 os::Linux::set_libpthread_version("linuxthreads"); |
| 0 | 637 } |
| 638 | |
| 639 if (strstr(libpthread_version(), "NPTL")) { | |
| 640 os::Linux::set_is_NPTL(); | |
| 641 } else { | |
| 642 os::Linux::set_is_LinuxThreads(); | |
| 643 } | |
| 644 | |
| 645 // LinuxThreads have two flavors: floating-stack mode, which allows variable | |
| 646 // stack size; and fixed-stack mode. NPTL is always floating-stack. | |
| 647 if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) { | |
| 648 os::Linux::set_is_floating_stack(); | |
| 649 } | |
| 650 } | |
| 651 | |
| 652 ///////////////////////////////////////////////////////////////////////////// | |
| 653 // thread stack | |
| 654 | |
| 655 // Force Linux kernel to expand current thread stack. If "bottom" is close | |
| 656 // to the stack guard, caller should block all signals. | |
| 657 // | |
| 658 // MAP_GROWSDOWN: | |
| 659 // A special mmap() flag that is used to implement thread stacks. It tells | |
| 660 // kernel that the memory region should extend downwards when needed. This | |
| 661 // allows early versions of LinuxThreads to only mmap the first few pages | |
| 662 // when creating a new thread. Linux kernel will automatically expand thread | |
| 663 // stack as needed (on page faults). | |
| 664 // | |
| 665 // However, because the memory region of a MAP_GROWSDOWN stack can grow on | |
| 666 // demand, if a page fault happens outside an already mapped MAP_GROWSDOWN | |
| 667 // region, it's hard to tell if the fault is due to a legitimate stack | |
| 668 // access or because of reading/writing non-exist memory (e.g. buffer | |
| 669 // overrun). As a rule, if the fault happens below current stack pointer, | |
| 670 // Linux kernel does not expand stack, instead a SIGSEGV is sent to the | |
| 671 // application (see Linux kernel fault.c). | |
| 672 // | |
| 673 // This Linux feature can cause SIGSEGV when VM bangs thread stack for | |
| 674 // stack overflow detection. | |
| 675 // | |
| 676 // Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do | |
| 677 // not use this flag. However, the stack of initial thread is not created | |
| 678 // by pthread, it is still MAP_GROWSDOWN. Also it's possible (though | |
| 679 // unlikely) that user code can create a thread with MAP_GROWSDOWN stack | |
| 680 // and then attach the thread to JVM. | |
| 681 // | |
| 682 // To get around the problem and allow stack banging on Linux, we need to | |
| 683 // manually expand thread stack after receiving the SIGSEGV. | |
| 684 // | |
| 685 // There are two ways to expand thread stack to address "bottom", we used | |
| 686 // both of them in JVM before 1.5: | |
| 687 // 1. adjust stack pointer first so that it is below "bottom", and then | |
| 688 // touch "bottom" | |
| 689 // 2. mmap() the page in question | |
| 690 // | |
| 691 // Now alternate signal stack is gone, it's harder to use 2. For instance, | |
| 692 // if current sp is already near the lower end of page 101, and we need to | |
| 693 // call mmap() to map page 100, it is possible that part of the mmap() frame | |
| 694 // will be placed in page 100. When page 100 is mapped, it is zero-filled. | |
| 695 // That will destroy the mmap() frame and cause VM to crash. | |
| 696 // | |
| 697 // The following code works by adjusting sp first, then accessing the "bottom" | |
| 698 // page to force a page fault. Linux kernel will then automatically expand the | |
| 699 // stack mapping. | |
| 700 // | |
| 701 // _expand_stack_to() assumes its frame size is less than page size, which | |
| 702 // should always be true if the function is not inlined. | |
| 703 | |
| 704 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute | |
| 705 #define NOINLINE | |
| 706 #else | |
| 707 #define NOINLINE __attribute__ ((noinline)) | |
| 708 #endif | |
| 709 | |
| 710 static void _expand_stack_to(address bottom) NOINLINE; | |
| 711 | |
| 712 static void _expand_stack_to(address bottom) { | |
| 713 address sp; | |
| 714 size_t size; | |
| 715 volatile char *p; | |
| 716 | |
| 717 // Adjust bottom to point to the largest address within the same page, it | |
| 718 // gives us a one-page buffer if alloca() allocates slightly more memory. | |
| 719 bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size()); | |
| 720 bottom += os::Linux::page_size() - 1; | |
| 721 | |
| 722 // sp might be slightly above current stack pointer; if that's the case, we | |
| 723 // will alloca() a little more space than necessary, which is OK. Don't use | |
| 724 // os::current_stack_pointer(), as its result can be slightly below current | |
| 725 // stack pointer, causing us to not alloca enough to reach "bottom". | |
| 726 sp = (address)&sp; | |
| 727 | |
| 728 if (sp > bottom) { | |
| 729 size = sp - bottom; | |
| 730 p = (volatile char *)alloca(size); | |
| 731 assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?"); | |
| 732 p[0] = '\0'; | |
| 733 } | |
| 734 } | |
| 735 | |
| 736 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) { | |
| 737 assert(t!=NULL, "just checking"); | |
| 738 assert(t->osthread()->expanding_stack(), "expand should be set"); | |
| 739 assert(t->stack_base() != NULL, "stack_base was not initialized"); | |
| 740 | |
| 741 if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) { | |
| 742 sigset_t mask_all, old_sigset; | |
| 743 sigfillset(&mask_all); | |
| 744 pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset); | |
| 745 _expand_stack_to(addr); | |
| 746 pthread_sigmask(SIG_SETMASK, &old_sigset, NULL); | |
| 747 return true; | |
| 748 } | |
| 749 return false; | |
| 750 } | |
| 751 | |
| 752 ////////////////////////////////////////////////////////////////////////////// | |
| 753 // create new thread | |
| 754 | |
| 755 static address highest_vm_reserved_address(); | |
| 756 | |
| 757 // check if it's safe to start a new thread | |
| 758 static bool _thread_safety_check(Thread* thread) { | |
| 759 if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) { | |
| 760 // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat) | |
| 761 // Heap is mmap'ed at lower end of memory space. Thread stacks are | |
| 762 // allocated (MAP_FIXED) from high address space. Every thread stack | |
| 763 // occupies a fixed size slot (usually 2Mbytes, but user can change | |
| 764 // it to other values if they rebuild LinuxThreads). | |
| 765 // | |
| 766 // Problem with MAP_FIXED is that mmap() can still succeed even part of | |
| 767 // the memory region has already been mmap'ed. That means if we have too | |
| 768 // many threads and/or very large heap, eventually thread stack will | |
| 769 // collide with heap. | |
| 770 // | |
| 771 // Here we try to prevent heap/stack collision by comparing current | |
| 772 // stack bottom with the highest address that has been mmap'ed by JVM | |
| 773 // plus a safety margin for memory maps created by native code. | |
| 774 // | |
| 775 // This feature can be disabled by setting ThreadSafetyMargin to 0 | |
| 776 // | |
| 777 if (ThreadSafetyMargin > 0) { | |
| 778 address stack_bottom = os::current_stack_base() - os::current_stack_size(); | |
| 779 | |
| 780 // not safe if our stack extends below the safety margin | |
| 781 return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address(); | |
| 782 } else { | |
| 783 return true; | |
| 784 } | |
| 785 } else { | |
| 786 // Floating stack LinuxThreads or NPTL: | |
| 787 // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When | |
| 788 // there's not enough space left, pthread_create() will fail. If we come | |
| 789 // here, that means enough space has been reserved for stack. | |
| 790 return true; | |
| 791 } | |
| 792 } | |
| 793 | |
| 794 // Thread start routine for all newly created threads | |
| 795 static void *java_start(Thread *thread) { | |
| 796 // Try to randomize the cache line index of hot stack frames. | |
| 797 // This helps when threads of the same stack traces evict each other's | |
| 798 // cache lines. The threads can be either from the same JVM instance, or | |
| 799 // from different JVM instances. The benefit is especially true for | |
| 800 // processors with hyperthreading technology. | |
| 801 static int counter = 0; | |
| 802 int pid = os::current_process_id(); | |
| 803 alloca(((pid ^ counter++) & 7) * 128); | |
| 804 | |
| 805 ThreadLocalStorage::set_thread(thread); | |
| 806 | |
| 807 OSThread* osthread = thread->osthread(); | |
| 808 Monitor* sync = osthread->startThread_lock(); | |
| 809 | |
| 810 // non floating stack LinuxThreads needs extra check, see above | |
| 811 if (!_thread_safety_check(thread)) { | |
| 812 // notify parent thread | |
| 813 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 814 osthread->set_state(ZOMBIE); | |
| 815 sync->notify_all(); | |
| 816 return NULL; | |
| 817 } | |
| 818 | |
| 819 // thread_id is kernel thread id (similar to Solaris LWP id) | |
| 820 osthread->set_thread_id(os::Linux::gettid()); | |
| 821 | |
| 822 if (UseNUMA) { | |
| 823 int lgrp_id = os::numa_get_group_id(); | |
| 824 if (lgrp_id != -1) { | |
| 825 thread->set_lgrp_id(lgrp_id); | |
| 826 } | |
| 827 } | |
| 828 // initialize signal mask for this thread | |
| 829 os::Linux::hotspot_sigmask(thread); | |
| 830 | |
| 831 // initialize floating point control register | |
| 832 os::Linux::init_thread_fpu_state(); | |
| 833 | |
| 834 // handshaking with parent thread | |
| 835 { | |
| 836 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 837 | |
| 838 // notify parent thread | |
| 839 osthread->set_state(INITIALIZED); | |
| 840 sync->notify_all(); | |
| 841 | |
| 842 // wait until os::start_thread() | |
| 843 while (osthread->get_state() == INITIALIZED) { | |
| 844 sync->wait(Mutex::_no_safepoint_check_flag); | |
| 845 } | |
| 846 } | |
| 847 | |
| 848 // call one more level start routine | |
| 849 thread->run(); | |
| 850 | |
| 851 return 0; | |
| 852 } | |
| 853 | |
| 854 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 855 assert(thread->osthread() == NULL, "caller responsible"); | |
| 856 | |
| 857 // Allocate the OSThread object | |
| 858 OSThread* osthread = new OSThread(NULL, NULL); | |
| 859 if (osthread == NULL) { | |
| 860 return false; | |
| 861 } | |
| 862 | |
| 863 // set the correct thread state | |
| 864 osthread->set_thread_type(thr_type); | |
| 865 | |
| 866 // Initial state is ALLOCATED but not INITIALIZED | |
| 867 osthread->set_state(ALLOCATED); | |
| 868 | |
| 869 thread->set_osthread(osthread); | |
| 870 | |
| 871 // init thread attributes | |
| 872 pthread_attr_t attr; | |
| 873 pthread_attr_init(&attr); | |
| 874 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
| 875 | |
| 876 // stack size | |
| 877 if (os::Linux::supports_variable_stack_size()) { | |
| 878 // calculate stack size if it's not specified by caller | |
| 879 if (stack_size == 0) { | |
| 880 stack_size = os::Linux::default_stack_size(thr_type); | |
| 881 | |
| 882 switch (thr_type) { | |
| 883 case os::java_thread: | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
884 // Java threads use ThreadStackSize which default value can be |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
885 // changed with the flag -Xss |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
886 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
|
887 stack_size = JavaThread::stack_size_at_create(); |
| 0 | 888 break; |
| 889 case os::compiler_thread: | |
| 890 if (CompilerThreadStackSize > 0) { | |
| 891 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 892 break; | |
| 893 } // else fall through: | |
| 894 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 895 case os::vm_thread: | |
| 896 case os::pgc_thread: | |
| 897 case os::cgc_thread: | |
| 898 case os::watcher_thread: | |
| 899 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 900 break; | |
| 901 } | |
| 902 } | |
| 903 | |
| 904 stack_size = MAX2(stack_size, os::Linux::min_stack_allowed); | |
| 905 pthread_attr_setstacksize(&attr, stack_size); | |
| 906 } else { | |
| 907 // let pthread_create() pick the default value. | |
| 908 } | |
| 909 | |
| 910 // glibc guard page | |
| 911 pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type)); | |
| 912 | |
| 913 ThreadState state; | |
| 914 | |
| 915 { | |
| 916 // Serialize thread creation if we are running with fixed stack LinuxThreads | |
| 917 bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack(); | |
| 918 if (lock) { | |
| 919 os::Linux::createThread_lock()->lock_without_safepoint_check(); | |
| 920 } | |
| 921 | |
| 922 pthread_t tid; | |
| 923 int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); | |
| 924 | |
| 925 pthread_attr_destroy(&attr); | |
| 926 | |
| 927 if (ret != 0) { | |
| 928 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 929 perror("pthread_create()"); | |
| 930 } | |
| 931 // Need to clean up stuff we've allocated so far | |
| 932 thread->set_osthread(NULL); | |
| 933 delete osthread; | |
| 934 if (lock) os::Linux::createThread_lock()->unlock(); | |
| 935 return false; | |
| 936 } | |
| 937 | |
| 938 // Store pthread info into the OSThread | |
| 939 osthread->set_pthread_id(tid); | |
| 940 | |
| 941 // Wait until child thread is either initialized or aborted | |
| 942 { | |
| 943 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 944 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 945 while ((state = osthread->get_state()) == ALLOCATED) { | |
| 946 sync_with_child->wait(Mutex::_no_safepoint_check_flag); | |
| 947 } | |
| 948 } | |
| 949 | |
| 950 if (lock) { | |
| 951 os::Linux::createThread_lock()->unlock(); | |
| 952 } | |
| 953 } | |
| 954 | |
| 955 // Aborted due to thread limit being reached | |
| 956 if (state == ZOMBIE) { | |
| 957 thread->set_osthread(NULL); | |
| 958 delete osthread; | |
| 959 return false; | |
| 960 } | |
| 961 | |
| 962 // The thread is returned suspended (in state INITIALIZED), | |
| 963 // and is started higher up in the call chain | |
| 964 assert(state == INITIALIZED, "race condition"); | |
| 965 return true; | |
| 966 } | |
| 967 | |
| 968 ///////////////////////////////////////////////////////////////////////////// | |
| 969 // attach existing thread | |
| 970 | |
| 971 // bootstrap the main thread | |
| 972 bool os::create_main_thread(JavaThread* thread) { | |
| 973 assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread"); | |
| 974 return create_attached_thread(thread); | |
| 975 } | |
| 976 | |
| 977 bool os::create_attached_thread(JavaThread* thread) { | |
| 978 #ifdef ASSERT | |
| 979 thread->verify_not_published(); | |
| 980 #endif | |
| 981 | |
| 982 // Allocate the OSThread object | |
| 983 OSThread* osthread = new OSThread(NULL, NULL); | |
| 984 | |
| 985 if (osthread == NULL) { | |
| 986 return false; | |
| 987 } | |
| 988 | |
| 989 // Store pthread info into the OSThread | |
| 990 osthread->set_thread_id(os::Linux::gettid()); | |
| 991 osthread->set_pthread_id(::pthread_self()); | |
| 992 | |
| 993 // initialize floating point control register | |
| 994 os::Linux::init_thread_fpu_state(); | |
| 995 | |
| 996 // Initial thread state is RUNNABLE | |
| 997 osthread->set_state(RUNNABLE); | |
| 998 | |
| 999 thread->set_osthread(osthread); | |
| 1000 | |
| 1001 if (UseNUMA) { | |
| 1002 int lgrp_id = os::numa_get_group_id(); | |
| 1003 if (lgrp_id != -1) { | |
| 1004 thread->set_lgrp_id(lgrp_id); | |
| 1005 } | |
| 1006 } | |
| 1007 | |
| 1008 if (os::Linux::is_initial_thread()) { | |
| 1009 // If current thread is initial thread, its stack is mapped on demand, | |
| 1010 // see notes about MAP_GROWSDOWN. Here we try to force kernel to map | |
| 1011 // the entire stack region to avoid SEGV in stack banging. | |
| 1012 // It is also useful to get around the heap-stack-gap problem on SuSE | |
| 1013 // kernel (see 4821821 for details). We first expand stack to the top | |
| 1014 // of yellow zone, then enable stack yellow zone (order is significant, | |
| 1015 // enabling yellow zone first will crash JVM on SuSE Linux), so there | |
| 1016 // is no gap between the last two virtual memory regions. | |
| 1017 | |
| 1018 JavaThread *jt = (JavaThread *)thread; | |
| 1019 address addr = jt->stack_yellow_zone_base(); | |
| 1020 assert(addr != NULL, "initialization problem?"); | |
| 1021 assert(jt->stack_available(addr) > 0, "stack guard should not be enabled"); | |
| 1022 | |
| 1023 osthread->set_expanding_stack(); | |
| 1024 os::Linux::manually_expand_stack(jt, addr); | |
| 1025 osthread->clear_expanding_stack(); | |
| 1026 } | |
| 1027 | |
| 1028 // initialize signal mask for this thread | |
| 1029 // and save the caller's signal mask | |
| 1030 os::Linux::hotspot_sigmask(thread); | |
| 1031 | |
| 1032 return true; | |
| 1033 } | |
| 1034 | |
| 1035 void os::pd_start_thread(Thread* thread) { | |
| 1036 OSThread * osthread = thread->osthread(); | |
| 1037 assert(osthread->get_state() != INITIALIZED, "just checking"); | |
| 1038 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 1039 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 1040 sync_with_child->notify(); | |
| 1041 } | |
| 1042 | |
| 1043 // Free Linux resources related to the OSThread | |
| 1044 void os::free_thread(OSThread* osthread) { | |
| 1045 assert(osthread != NULL, "osthread not set"); | |
| 1046 | |
| 1047 if (Thread::current()->osthread() == osthread) { | |
| 1048 // Restore caller's signal mask | |
| 1049 sigset_t sigmask = osthread->caller_sigmask(); | |
| 1050 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); | |
| 1051 } | |
| 1052 | |
| 1053 delete osthread; | |
| 1054 } | |
| 1055 | |
| 1056 ////////////////////////////////////////////////////////////////////////////// | |
| 1057 // thread local storage | |
| 1058 | |
| 1059 int os::allocate_thread_local_storage() { | |
| 1060 pthread_key_t key; | |
| 1061 int rslt = pthread_key_create(&key, NULL); | |
| 1062 assert(rslt == 0, "cannot allocate thread local storage"); | |
| 1063 return (int)key; | |
| 1064 } | |
| 1065 | |
| 1066 // Note: This is currently not used by VM, as we don't destroy TLS key | |
| 1067 // on VM exit. | |
| 1068 void os::free_thread_local_storage(int index) { | |
| 1069 int rslt = pthread_key_delete((pthread_key_t)index); | |
| 1070 assert(rslt == 0, "invalid index"); | |
| 1071 } | |
| 1072 | |
| 1073 void os::thread_local_storage_at_put(int index, void* value) { | |
| 1074 int rslt = pthread_setspecific((pthread_key_t)index, value); | |
| 1075 assert(rslt == 0, "pthread_setspecific failed"); | |
| 1076 } | |
| 1077 | |
| 1078 extern "C" Thread* get_thread() { | |
| 1079 return ThreadLocalStorage::thread(); | |
| 1080 } | |
| 1081 | |
| 1082 ////////////////////////////////////////////////////////////////////////////// | |
| 1083 // initial thread | |
| 1084 | |
| 1085 // Check if current thread is the initial thread, similar to Solaris thr_main. | |
| 1086 bool os::Linux::is_initial_thread(void) { | |
| 1087 char dummy; | |
| 1088 // If called before init complete, thread stack bottom will be null. | |
| 1089 // Can be called if fatal error occurs before initialization. | |
| 1090 if (initial_thread_stack_bottom() == NULL) return false; | |
| 1091 assert(initial_thread_stack_bottom() != NULL && | |
| 1092 initial_thread_stack_size() != 0, | |
| 1093 "os::init did not locate initial thread's stack region"); | |
| 1094 if ((address)&dummy >= initial_thread_stack_bottom() && | |
| 1095 (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size()) | |
| 1096 return true; | |
| 1097 else return false; | |
| 1098 } | |
| 1099 | |
| 1100 // Find the virtual memory area that contains addr | |
| 1101 static bool find_vma(address addr, address* vma_low, address* vma_high) { | |
| 1102 FILE *fp = fopen("/proc/self/maps", "r"); | |
| 1103 if (fp) { | |
| 1104 address low, high; | |
| 1105 while (!feof(fp)) { | |
| 1106 if (fscanf(fp, "%p-%p", &low, &high) == 2) { | |
| 1107 if (low <= addr && addr < high) { | |
| 1108 if (vma_low) *vma_low = low; | |
| 1109 if (vma_high) *vma_high = high; | |
| 1110 fclose (fp); | |
| 1111 return true; | |
| 1112 } | |
| 1113 } | |
| 1114 for (;;) { | |
| 1115 int ch = fgetc(fp); | |
| 1116 if (ch == EOF || ch == (int)'\n') break; | |
| 1117 } | |
| 1118 } | |
| 1119 fclose(fp); | |
| 1120 } | |
| 1121 return false; | |
| 1122 } | |
| 1123 | |
| 1124 // Locate initial thread stack. This special handling of initial thread stack | |
| 1125 // is needed because pthread_getattr_np() on most (all?) Linux distros returns | |
| 1126 // bogus value for initial thread. | |
| 1127 void os::Linux::capture_initial_stack(size_t max_size) { | |
| 1128 // stack size is the easy part, get it from RLIMIT_STACK | |
| 1129 size_t stack_size; | |
| 1130 struct rlimit rlim; | |
| 1131 getrlimit(RLIMIT_STACK, &rlim); | |
| 1132 stack_size = rlim.rlim_cur; | |
| 1133 | |
| 1134 // 6308388: a bug in ld.so will relocate its own .data section to the | |
| 1135 // lower end of primordial stack; reduce ulimit -s value a little bit | |
| 1136 // so we won't install guard page on ld.so's data section. | |
| 1137 stack_size -= 2 * page_size(); | |
| 1138 | |
| 1139 // 4441425: avoid crash with "unlimited" stack size on SuSE 7.1 or Redhat | |
| 1140 // 7.1, in both cases we will get 2G in return value. | |
| 1141 // 4466587: glibc 2.2.x compiled w/o "--enable-kernel=2.4.0" (RH 7.0, | |
| 1142 // SuSE 7.2, Debian) can not handle alternate signal stack correctly | |
| 1143 // for initial thread if its stack size exceeds 6M. Cap it at 2M, | |
| 1144 // in case other parts in glibc still assumes 2M max stack size. | |
| 1145 // FIXME: alt signal stack is gone, maybe we can relax this constraint? | |
| 1146 // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small | |
| 7994 | 1147 if (stack_size > 2 * K * K IA64_ONLY(*2)) |
| 1148 stack_size = 2 * K * K IA64_ONLY(*2); | |
| 0 | 1149 // Try to figure out where the stack base (top) is. This is harder. |
| 1150 // | |
| 1151 // When an application is started, glibc saves the initial stack pointer in | |
| 1152 // a global variable "__libc_stack_end", which is then used by system | |
| 1153 // libraries. __libc_stack_end should be pretty close to stack top. The | |
| 1154 // variable is available since the very early days. However, because it is | |
| 1155 // a private interface, it could disappear in the future. | |
| 1156 // | |
| 1157 // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar | |
| 1158 // to __libc_stack_end, it is very close to stack top, but isn't the real | |
| 1159 // stack top. Note that /proc may not exist if VM is running as a chroot | |
| 1160 // program, so reading /proc/<pid>/stat could fail. Also the contents of | |
| 1161 // /proc/<pid>/stat could change in the future (though unlikely). | |
| 1162 // | |
| 1163 // We try __libc_stack_end first. If that doesn't work, look for | |
| 1164 // /proc/<pid>/stat. If neither of them works, we use current stack pointer | |
| 1165 // as a hint, which should work well in most cases. | |
| 1166 | |
| 1167 uintptr_t stack_start; | |
| 1168 | |
| 1169 // try __libc_stack_end first | |
| 1170 uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end"); | |
| 1171 if (p && *p) { | |
| 1172 stack_start = *p; | |
| 1173 } else { | |
| 1174 // see if we can get the start_stack field from /proc/self/stat | |
| 1175 FILE *fp; | |
| 1176 int pid; | |
| 1177 char state; | |
| 1178 int ppid; | |
| 1179 int pgrp; | |
| 1180 int session; | |
| 1181 int nr; | |
| 1182 int tpgrp; | |
| 1183 unsigned long flags; | |
| 1184 unsigned long minflt; | |
| 1185 unsigned long cminflt; | |
| 1186 unsigned long majflt; | |
| 1187 unsigned long cmajflt; | |
| 1188 unsigned long utime; | |
| 1189 unsigned long stime; | |
| 1190 long cutime; | |
| 1191 long cstime; | |
| 1192 long prio; | |
| 1193 long nice; | |
| 1194 long junk; | |
| 1195 long it_real; | |
| 1196 uintptr_t start; | |
| 1197 uintptr_t vsize; | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1198 intptr_t rss; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1199 uintptr_t rsslim; |
| 0 | 1200 uintptr_t scodes; |
| 1201 uintptr_t ecode; | |
| 1202 int i; | |
| 1203 | |
| 1204 // Figure what the primordial thread stack base is. Code is inspired | |
| 1205 // by email from Hans Boehm. /proc/self/stat begins with current pid, | |
| 1206 // followed by command name surrounded by parentheses, state, etc. | |
| 1207 char stat[2048]; | |
| 1208 int statlen; | |
| 1209 | |
| 1210 fp = fopen("/proc/self/stat", "r"); | |
| 1211 if (fp) { | |
| 1212 statlen = fread(stat, 1, 2047, fp); | |
| 1213 stat[statlen] = '\0'; | |
| 1214 fclose(fp); | |
| 1215 | |
| 1216 // Skip pid and the command string. Note that we could be dealing with | |
| 1217 // weird command names, e.g. user could decide to rename java launcher | |
| 1218 // to "java 1.4.2 :)", then the stat file would look like | |
| 1219 // 1234 (java 1.4.2 :)) R ... ... | |
| 1220 // We don't really need to know the command string, just find the last | |
| 1221 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 1222 char * s = strrchr(stat, ')'); | |
| 1223 | |
| 1224 i = 0; | |
| 1225 if (s) { | |
| 1226 // Skip blank chars | |
| 1227 do s++; while (isspace(*s)); | |
| 1228 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1229 #define _UFM UINTX_FORMAT |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1230 #define _DFM INTX_FORMAT |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1231 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1232 /* 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
|
1233 /* 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
|
1234 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 | 1235 &state, /* 3 %c */ |
| 1236 &ppid, /* 4 %d */ | |
| 1237 &pgrp, /* 5 %d */ | |
| 1238 &session, /* 6 %d */ | |
| 1239 &nr, /* 7 %d */ | |
| 1240 &tpgrp, /* 8 %d */ | |
| 1241 &flags, /* 9 %lu */ | |
| 1242 &minflt, /* 10 %lu */ | |
| 1243 &cminflt, /* 11 %lu */ | |
| 1244 &majflt, /* 12 %lu */ | |
| 1245 &cmajflt, /* 13 %lu */ | |
| 1246 &utime, /* 14 %lu */ | |
| 1247 &stime, /* 15 %lu */ | |
| 1248 &cutime, /* 16 %ld */ | |
| 1249 &cstime, /* 17 %ld */ | |
| 1250 &prio, /* 18 %ld */ | |
| 1251 &nice, /* 19 %ld */ | |
| 1252 &junk, /* 20 %ld */ | |
| 1253 &it_real, /* 21 %ld */ | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1254 &start, /* 22 UINTX_FORMAT */ |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1255 &vsize, /* 23 UINTX_FORMAT */ |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1256 &rss, /* 24 INTX_FORMAT */ |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1257 &rsslim, /* 25 UINTX_FORMAT */ |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1258 &scodes, /* 26 UINTX_FORMAT */ |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1259 &ecode, /* 27 UINTX_FORMAT */ |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1260 &stack_start); /* 28 UINTX_FORMAT */ |
| 0 | 1261 } |
| 1262 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1263 #undef _UFM |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1264 #undef _DFM |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1265 |
| 0 | 1266 if (i != 28 - 2) { |
| 1267 assert(false, "Bad conversion from /proc/self/stat"); | |
| 1268 // product mode - assume we are the initial thread, good luck in the | |
| 1269 // embedded case. | |
| 1270 warning("Can't detect initial thread stack location - bad conversion"); | |
| 1271 stack_start = (uintptr_t) &rlim; | |
| 1272 } | |
| 1273 } else { | |
| 1274 // For some reason we can't open /proc/self/stat (for example, running on | |
| 1275 // FreeBSD with a Linux emulator, or inside chroot), this should work for | |
| 1276 // most cases, so don't abort: | |
| 1277 warning("Can't detect initial thread stack location - no /proc/self/stat"); | |
| 1278 stack_start = (uintptr_t) &rlim; | |
| 1279 } | |
| 1280 } | |
| 1281 | |
| 1282 // Now we have a pointer (stack_start) very close to the stack top, the | |
| 1283 // next thing to do is to figure out the exact location of stack top. We | |
| 1284 // can find out the virtual memory area that contains stack_start by | |
| 1285 // reading /proc/self/maps, it should be the last vma in /proc/self/maps, | |
| 1286 // and its upper limit is the real stack top. (again, this would fail if | |
| 1287 // running inside chroot, because /proc may not exist.) | |
| 1288 | |
| 1289 uintptr_t stack_top; | |
| 1290 address low, high; | |
| 1291 if (find_vma((address)stack_start, &low, &high)) { | |
| 1292 // success, "high" is the true stack top. (ignore "low", because initial | |
| 1293 // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.) | |
| 1294 stack_top = (uintptr_t)high; | |
| 1295 } else { | |
| 1296 // failed, likely because /proc/self/maps does not exist | |
| 1297 warning("Can't detect initial thread stack location - find_vma failed"); | |
| 1298 // best effort: stack_start is normally within a few pages below the real | |
| 1299 // stack top, use it as stack top, and reduce stack size so we won't put | |
| 1300 // guard page outside stack. | |
| 1301 stack_top = stack_start; | |
| 1302 stack_size -= 16 * page_size(); | |
| 1303 } | |
| 1304 | |
| 1305 // stack_top could be partially down the page so align it | |
| 1306 stack_top = align_size_up(stack_top, page_size()); | |
| 1307 | |
| 1308 if (max_size && stack_size > max_size) { | |
| 1309 _initial_thread_stack_size = max_size; | |
| 1310 } else { | |
| 1311 _initial_thread_stack_size = stack_size; | |
| 1312 } | |
| 1313 | |
| 1314 _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size()); | |
| 1315 _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size; | |
| 1316 } | |
| 1317 | |
| 1318 //////////////////////////////////////////////////////////////////////////////// | |
| 1319 // time support | |
| 1320 | |
| 1321 // Time since start-up in seconds to a fine granularity. | |
| 1322 // Used by VMSelfDestructTimer and the MemProfiler. | |
| 1323 double os::elapsedTime() { | |
| 1324 | |
| 1325 return (double)(os::elapsed_counter()) * 0.000001; | |
| 1326 } | |
| 1327 | |
| 1328 jlong os::elapsed_counter() { | |
| 1329 timeval time; | |
| 1330 int status = gettimeofday(&time, NULL); | |
| 1331 return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count; | |
| 1332 } | |
| 1333 | |
| 1334 jlong os::elapsed_frequency() { | |
| 1335 return (1000 * 1000); | |
| 1336 } | |
| 1337 | |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1338 // For now, we say that linux does not support vtime. I have no idea |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1339 // whether it can actually be made to (DLD, 9/13/05). |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1340 |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1341 bool os::supports_vtime() { return false; } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1342 bool os::enable_vtime() { return false; } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1343 bool os::vtime_enabled() { return false; } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1344 double os::elapsedVTime() { |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1345 // better than nothing, but not much |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1346 return elapsedTime(); |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1347 } |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
141
diff
changeset
|
1348 |
| 61 | 1349 jlong os::javaTimeMillis() { |
| 0 | 1350 timeval time; |
| 1351 int status = gettimeofday(&time, NULL); | |
| 1352 assert(status != -1, "linux error"); | |
| 1353 return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); | |
| 1354 } | |
| 1355 | |
| 1356 #ifndef CLOCK_MONOTONIC | |
| 1357 #define CLOCK_MONOTONIC (1) | |
| 1358 #endif | |
| 1359 | |
| 1360 void os::Linux::clock_init() { | |
| 1361 // we do dlopen's in this particular order due to bug in linux | |
| 1362 // dynamical loader (see 6348968) leading to crash on exit | |
| 1363 void* handle = dlopen("librt.so.1", RTLD_LAZY); | |
| 1364 if (handle == NULL) { | |
| 1365 handle = dlopen("librt.so", RTLD_LAZY); | |
| 1366 } | |
| 1367 | |
| 1368 if (handle) { | |
| 1369 int (*clock_getres_func)(clockid_t, struct timespec*) = | |
| 1370 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres"); | |
| 1371 int (*clock_gettime_func)(clockid_t, struct timespec*) = | |
| 1372 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime"); | |
| 1373 if (clock_getres_func && clock_gettime_func) { | |
| 1374 // See if monotonic clock is supported by the kernel. Note that some | |
| 1375 // early implementations simply return kernel jiffies (updated every | |
| 1376 // 1/100 or 1/1000 second). It would be bad to use such a low res clock | |
| 1377 // for nano time (though the monotonic property is still nice to have). | |
| 1378 // It's fixed in newer kernels, however clock_getres() still returns | |
| 1379 // 1/HZ. We check if clock_getres() works, but will ignore its reported | |
| 1380 // resolution for now. Hopefully as people move to new kernels, this | |
| 1381 // won't be a problem. | |
| 1382 struct timespec res; | |
| 1383 struct timespec tp; | |
| 1384 if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 && | |
| 1385 clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) { | |
| 1386 // yes, monotonic clock is supported | |
| 1387 _clock_gettime = clock_gettime_func; | |
| 1388 } else { | |
| 1389 // close librt if there is no monotonic clock | |
| 1390 dlclose(handle); | |
| 1391 } | |
| 1392 } | |
| 1393 } | |
| 1394 } | |
| 1395 | |
| 1396 #ifndef SYS_clock_getres | |
| 1397 | |
| 1398 #if defined(IA32) || defined(AMD64) | |
| 1399 #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
|
1400 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1401 #else |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1402 #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
|
1403 #define sys_clock_getres(x,y) -1 |
| 0 | 1404 #endif |
| 1405 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1406 #else |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
1407 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1408 #endif |
| 1409 | |
| 1410 void os::Linux::fast_thread_clock_init() { | |
| 1411 if (!UseLinuxPosixThreadCPUClocks) { | |
| 1412 return; | |
| 1413 } | |
| 1414 clockid_t clockid; | |
| 1415 struct timespec tp; | |
| 1416 int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) = | |
| 1417 (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid"); | |
| 1418 | |
| 1419 // Switch to using fast clocks for thread cpu time if | |
| 1420 // the sys_clock_getres() returns 0 error code. | |
| 1421 // Note, that some kernels may support the current thread | |
| 1422 // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks | |
| 1423 // returned by the pthread_getcpuclockid(). | |
| 1424 // If the fast Posix clocks are supported then the sys_clock_getres() | |
| 1425 // must return at least tp.tv_sec == 0 which means a resolution | |
| 1426 // better than 1 sec. This is extra check for reliability. | |
| 1427 | |
| 1428 if(pthread_getcpuclockid_func && | |
| 1429 pthread_getcpuclockid_func(_main_thread, &clockid) == 0 && | |
| 1430 sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) { | |
| 1431 | |
| 1432 _supports_fast_thread_cpu_time = true; | |
| 1433 _pthread_getcpuclockid = pthread_getcpuclockid_func; | |
| 1434 } | |
| 1435 } | |
| 1436 | |
| 1437 jlong os::javaTimeNanos() { | |
| 1438 if (Linux::supports_monotonic_clock()) { | |
| 1439 struct timespec tp; | |
| 1440 int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp); | |
| 1441 assert(status == 0, "gettime error"); | |
| 1442 jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); | |
| 1443 return result; | |
| 1444 } else { | |
| 1445 timeval time; | |
| 1446 int status = gettimeofday(&time, NULL); | |
| 1447 assert(status != -1, "linux error"); | |
| 1448 jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); | |
| 1449 return 1000 * usecs; | |
| 1450 } | |
| 1451 } | |
| 1452 | |
| 1453 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 1454 if (Linux::supports_monotonic_clock()) { | |
| 1455 info_ptr->max_value = ALL_64_BITS; | |
| 1456 | |
| 1457 // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past | |
| 1458 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
| 1459 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
| 1460 } else { | |
| 1461 // gettimeofday - based on time in seconds since the Epoch thus does not wrap | |
| 1462 info_ptr->max_value = ALL_64_BITS; | |
| 1463 | |
| 1464 // gettimeofday is a real time clock so it skips | |
| 1465 info_ptr->may_skip_backward = true; | |
| 1466 info_ptr->may_skip_forward = true; | |
| 1467 } | |
| 1468 | |
| 1469 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 1470 } | |
| 1471 | |
| 1472 // Return the real, user, and system times in seconds from an | |
| 1473 // arbitrary fixed point in the past. | |
| 1474 bool os::getTimesSecs(double* process_real_time, | |
| 1475 double* process_user_time, | |
| 1476 double* process_system_time) { | |
| 1477 struct tms ticks; | |
| 1478 clock_t real_ticks = times(&ticks); | |
| 1479 | |
| 1480 if (real_ticks == (clock_t) (-1)) { | |
| 1481 return false; | |
| 1482 } else { | |
| 1483 double ticks_per_second = (double) clock_tics_per_sec; | |
| 1484 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
| 1485 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
| 1486 *process_real_time = ((double) real_ticks) / ticks_per_second; | |
| 1487 | |
| 1488 return true; | |
| 1489 } | |
| 1490 } | |
| 1491 | |
| 1492 | |
| 1493 char * os::local_time_string(char *buf, size_t buflen) { | |
| 1494 struct tm t; | |
| 1495 time_t long_time; | |
| 1496 time(&long_time); | |
| 1497 localtime_r(&long_time, &t); | |
| 1498 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 1499 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
| 1500 t.tm_hour, t.tm_min, t.tm_sec); | |
| 1501 return buf; | |
| 1502 } | |
| 1503 | |
|
548
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1504 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
|
1505 return localtime_r(clock, res); |
|
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1506 } |
|
773234c55e8c
6800586: -XX:+PrintGCDateStamps is using mt-unsafe localtime function
ysr
parents:
516
diff
changeset
|
1507 |
| 0 | 1508 //////////////////////////////////////////////////////////////////////////////// |
| 1509 // runtime exit support | |
| 1510 | |
| 1511 // Note: os::shutdown() might be called very early during initialization, or | |
| 1512 // called from signal handler. Before adding something to os::shutdown(), make | |
| 1513 // sure it is async-safe and can handle partially initialized VM. | |
| 1514 void os::shutdown() { | |
| 1515 | |
| 1516 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 1517 perfMemory_exit(); | |
| 1518 | |
| 1519 // needs to remove object in file system | |
| 1520 AttachListener::abort(); | |
| 1521 | |
| 1522 // flush buffered output, finish log files | |
| 1523 ostream_abort(); | |
| 1524 | |
| 1525 // Check for abort hook | |
| 1526 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 1527 if (abort_hook != NULL) { | |
| 1528 abort_hook(); | |
| 1529 } | |
| 1530 | |
| 1531 } | |
| 1532 | |
| 1533 // Note: os::abort() might be called very early during initialization, or | |
| 1534 // called from signal handler. Before adding something to os::abort(), make | |
| 1535 // sure it is async-safe and can handle partially initialized VM. | |
| 1536 void os::abort(bool dump_core) { | |
| 1537 os::shutdown(); | |
| 1538 if (dump_core) { | |
| 1539 #ifndef PRODUCT | |
| 1540 fdStream out(defaultStream::output_fd()); | |
| 1541 out.print_raw("Current thread is "); | |
| 1542 char buf[16]; | |
| 1543 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
| 1544 out.print_raw_cr(buf); | |
| 1545 out.print_raw_cr("Dumping core ..."); | |
| 1546 #endif | |
| 1547 ::abort(); // dump core | |
| 1548 } | |
| 1549 | |
| 1550 ::exit(1); | |
| 1551 } | |
| 1552 | |
| 1553 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 1554 void os::die() { | |
| 1555 // _exit() on LinuxThreads only kills current thread | |
| 1556 ::abort(); | |
| 1557 } | |
| 1558 | |
| 1559 // unused on linux for now. | |
| 1560 void os::set_error_file(const char *logfile) {} | |
| 1561 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1562 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1563 // 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
|
1564 // from src/solaris/hpi/src/system_md.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1565 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1566 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
|
1567 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1568 if (errno == 0) return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1569 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1570 const char *s = ::strerror(errno); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1571 size_t n = ::strlen(s); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1572 if (n >= len) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1573 n = len - 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1574 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1575 ::strncpy(buf, s, n); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1576 buf[n] = '\0'; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1577 return n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1578 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
1579 |
| 0 | 1580 intx os::current_thread_id() { return (intx)pthread_self(); } |
| 1581 int os::current_process_id() { | |
| 1582 | |
| 1583 // Under the old linux thread library, linux gives each thread | |
| 1584 // its own process id. Because of this each thread will return | |
| 1585 // a different pid if this method were to return the result | |
| 1586 // of getpid(2). Linux provides no api that returns the pid | |
| 1587 // of the launcher thread for the vm. This implementation | |
| 1588 // returns a unique pid, the pid of the launcher thread | |
| 1589 // that starts the vm 'process'. | |
| 1590 | |
| 1591 // Under the NPTL, getpid() returns the same pid as the | |
| 1592 // launcher thread rather than a unique pid per thread. | |
| 1593 // Use gettid() if you want the old pre NPTL behaviour. | |
| 1594 | |
| 1595 // if you are looking for the result of a call to getpid() that | |
| 1596 // returns a unique pid for the calling thread, then look at the | |
| 1597 // OSThread::thread_id() method in osThread_linux.hpp file | |
| 1598 | |
| 1599 return (int)(_initial_pid ? _initial_pid : getpid()); | |
| 1600 } | |
| 1601 | |
| 1602 // DLL functions | |
| 1603 | |
| 1604 const char* os::dll_file_extension() { return ".so"; } | |
| 1605 | |
|
2130
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
parents:
2033
diff
changeset
|
1606 // 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
|
1607 // 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
|
1608 const char* os::get_temp_directory() { return "/tmp"; } |
| 0 | 1609 |
| 691 | 1610 static bool file_exists(const char* filename) { |
| 1611 struct stat statbuf; | |
| 1612 if (filename == NULL || strlen(filename) == 0) { | |
| 1613 return false; | |
| 1614 } | |
| 1615 return os::stat(filename, &statbuf) == 0; | |
| 1616 } | |
| 1617 | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1618 bool os::dll_build_name(char* buffer, size_t buflen, |
| 691 | 1619 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
|
1620 bool retval = false; |
| 691 | 1621 // Copied from libhpi |
| 242 | 1622 const size_t pnamelen = pname ? strlen(pname) : 0; |
| 1623 | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1624 // Return error on buffer overflow. |
| 242 | 1625 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
|
1626 return retval; |
| 242 | 1627 } |
| 1628 | |
| 1629 if (pnamelen == 0) { | |
| 691 | 1630 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
|
1631 retval = true; |
| 691 | 1632 } else if (strchr(pname, *os::path_separator()) != NULL) { |
| 1633 int n; | |
| 1634 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
|
1635 if (pelements == NULL) { |
| 9062 | 1636 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
|
1637 } |
| 691 | 1638 for (int i = 0 ; i < n ; i++) { |
| 1639 // Really shouldn't be NULL, but check can't hurt | |
| 1640 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
| 1641 continue; // skip the empty path values | |
| 1642 } | |
| 1643 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
| 1644 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
|
1645 retval = true; |
| 691 | 1646 break; |
| 1647 } | |
| 1648 } | |
| 1649 // release the storage | |
| 1650 for (int i = 0 ; i < n ; i++) { | |
| 1651 if (pelements[i] != NULL) { | |
| 6197 | 1652 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
| 691 | 1653 } |
| 1654 } | |
| 1655 if (pelements != NULL) { | |
| 6197 | 1656 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
| 691 | 1657 } |
| 242 | 1658 } else { |
| 691 | 1659 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
|
1660 retval = true; |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1661 } |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6825
diff
changeset
|
1662 return retval; |
| 242 | 1663 } |
| 1664 | |
| 0 | 1665 const char* os::get_current_directory(char *buf, int buflen) { |
| 1666 return getcwd(buf, buflen); | |
| 1667 } | |
| 1668 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
1669 // check if addr is inside libjvm.so |
| 0 | 1670 bool os::address_is_in_vm(address addr) { |
| 1671 static address libjvm_base_addr; | |
| 1672 Dl_info dlinfo; | |
| 1673 | |
| 1674 if (libjvm_base_addr == NULL) { | |
| 1675 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); | |
| 1676 libjvm_base_addr = (address)dlinfo.dli_fbase; | |
| 1677 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); | |
| 1678 } | |
| 1679 | |
| 1680 if (dladdr((void *)addr, &dlinfo)) { | |
| 1681 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; | |
| 1682 } | |
| 1683 | |
| 1684 return false; | |
| 1685 } | |
| 1686 | |
| 1687 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1688 int buflen, int *offset) { | |
| 1689 Dl_info dlinfo; | |
| 1690 | |
| 1691 if (dladdr((void*)addr, &dlinfo) && dlinfo.dli_sname != NULL) { | |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1692 if (buf != NULL) { |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1693 if(!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1694 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
|
1695 } |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1696 } |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1697 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
| 0 | 1698 return true; |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1699 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1700 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
| 4803 | 1701 buf, buflen, offset, dlinfo.dli_fname)) { |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1702 return true; |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1703 } |
| 0 | 1704 } |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1705 |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1706 if (buf != NULL) buf[0] = '\0'; |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1707 if (offset != NULL) *offset = -1; |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1708 return false; |
| 0 | 1709 } |
| 1710 | |
| 1711 struct _address_to_library_name { | |
| 1712 address addr; // input : memory address | |
| 1713 size_t buflen; // size of fname | |
| 1714 char* fname; // output: library name | |
| 1715 address base; // library base addr | |
| 1716 }; | |
| 1717 | |
| 1718 static int address_to_library_name_callback(struct dl_phdr_info *info, | |
| 1719 size_t size, void *data) { | |
| 1720 int i; | |
| 1721 bool found = false; | |
| 1722 address libbase = NULL; | |
| 1723 struct _address_to_library_name * d = (struct _address_to_library_name *)data; | |
| 1724 | |
| 1725 // iterate through all loadable segments | |
| 1726 for (i = 0; i < info->dlpi_phnum; i++) { | |
| 1727 address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr); | |
| 1728 if (info->dlpi_phdr[i].p_type == PT_LOAD) { | |
| 1729 // base address of a library is the lowest address of its loaded | |
| 1730 // segments. | |
| 1731 if (libbase == NULL || libbase > segbase) { | |
| 1732 libbase = segbase; | |
| 1733 } | |
| 1734 // see if 'addr' is within current segment | |
| 1735 if (segbase <= d->addr && | |
| 1736 d->addr < segbase + info->dlpi_phdr[i].p_memsz) { | |
| 1737 found = true; | |
| 1738 } | |
| 1739 } | |
| 1740 } | |
| 1741 | |
| 1742 // dlpi_name is NULL or empty if the ELF file is executable, return 0 | |
| 1743 // so dll_address_to_library_name() can fall through to use dladdr() which | |
| 1744 // can figure out executable name from argv[0]. | |
| 1745 if (found && info->dlpi_name && info->dlpi_name[0]) { | |
| 1746 d->base = libbase; | |
| 1747 if (d->fname) { | |
| 1748 jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name); | |
| 1749 } | |
| 1750 return 1; | |
| 1751 } | |
| 1752 return 0; | |
| 1753 } | |
| 1754 | |
| 1755 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1756 int buflen, int* offset) { | |
| 1757 Dl_info dlinfo; | |
| 1758 struct _address_to_library_name data; | |
| 1759 | |
| 1760 // There is a bug in old glibc dladdr() implementation that it could resolve | |
| 1761 // to wrong library name if the .so file has a base address != NULL. Here | |
| 1762 // we iterate through the program headers of all loaded libraries to find | |
| 1763 // out which library 'addr' really belongs to. This workaround can be | |
| 1764 // removed once the minimum requirement for glibc is moved to 2.3.x. | |
| 1765 data.addr = addr; | |
| 1766 data.fname = buf; | |
| 1767 data.buflen = buflen; | |
| 1768 data.base = NULL; | |
| 1769 int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data); | |
| 1770 | |
| 1771 if (rslt) { | |
| 1772 // buf already contains library name | |
| 1773 if (offset) *offset = addr - data.base; | |
| 1774 return true; | |
| 1775 } else if (dladdr((void*)addr, &dlinfo)){ | |
| 1776 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); | |
| 1777 if (offset) *offset = addr - (address)dlinfo.dli_fbase; | |
| 1778 return true; | |
| 1779 } else { | |
| 1780 if (buf) buf[0] = '\0'; | |
| 1781 if (offset) *offset = -1; | |
| 1782 return false; | |
| 1783 } | |
| 1784 } | |
| 1785 | |
| 1786 // Loads .dll/.so and | |
| 1787 // in case of error it checks if .dll/.so was built for the | |
| 1788 // same architecture as Hotspot is running on | |
| 1789 | |
|
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1790 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1791 // 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
|
1792 // 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
|
1793 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
|
1794 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1795 // 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
|
1796 // 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
|
1797 // 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
|
1798 // 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
|
1799 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
|
1800 private: |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1801 const char *_filename; |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1802 char *_ebuf; |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1803 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
|
1804 void *_lib; |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1805 public: |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1806 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
|
1807 _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
|
1808 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
|
1809 void doit() { |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1810 _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
|
1811 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
|
1812 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1813 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
|
1814 }; |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1815 |
| 0 | 1816 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
| 1817 { | |
|
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1818 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
|
1819 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
|
1820 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1821 // 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
|
1822 // 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
|
1823 // 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
|
1824 // |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1825 // 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
|
1826 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
|
1827 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
|
1828 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
|
1829 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
|
1830 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
|
1831 // 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
|
1832 // 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
|
1833 // |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1834 // 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
|
1835 // 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
|
1836 // |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1837 // 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
|
1838 // 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
|
1839 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
|
1840 } else { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1841 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
|
1842 "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
|
1843 "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
|
1844 "'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
|
1845 filename); |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1846 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1847 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
|
1848 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
|
1849 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
|
1850 // 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
|
1851 // 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
|
1852 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
|
1853 } else { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1854 if (!LoadExecStackDllInVMThread) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1855 // 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
|
1856 // 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
|
1857 // 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
|
1858 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
|
1859 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1860 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1861 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
|
1862 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
|
1863 |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1864 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
|
1865 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
|
1866 if (LoadExecStackDllInVMThread) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1867 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
|
1868 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1869 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
|
1870 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1871 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1872 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1873 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1874 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1875 if (!load_attempted) { |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
1876 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
|
1877 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
1878 |
| 0 | 1879 if (result != NULL) { |
| 1880 // Successful loading | |
| 1881 return result; | |
| 1882 } | |
| 1883 | |
| 1884 Elf32_Ehdr elf_head; | |
| 1885 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
| 1886 char* diag_msg_buf=ebuf+strlen(ebuf); | |
| 1887 | |
| 1888 if (diag_msg_max_length==0) { | |
| 1889 // No more space in ebuf for additional diagnostics message | |
| 1890 return NULL; | |
| 1891 } | |
| 1892 | |
| 1893 | |
| 1894 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
| 1895 | |
| 1896 if (file_descriptor < 0) { | |
| 1897 // Can't open library, report dlerror() message | |
| 1898 return NULL; | |
| 1899 } | |
| 1900 | |
| 1901 bool failed_to_read_elf_head= | |
| 1902 (sizeof(elf_head)!= | |
| 1903 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
| 1904 | |
| 1905 ::close(file_descriptor); | |
| 1906 if (failed_to_read_elf_head) { | |
| 1907 // file i/o error - report dlerror() msg | |
| 1908 return NULL; | |
| 1909 } | |
| 1910 | |
| 1911 typedef struct { | |
| 1912 Elf32_Half code; // Actual value as defined in elf.h | |
| 1913 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
| 1914 char elf_class; // 32 or 64 bit | |
| 1915 char endianess; // MSB or LSB | |
| 1916 char* name; // String representation | |
| 1917 } arch_t; | |
| 1918 | |
| 1919 #ifndef EM_486 | |
| 1920 #define EM_486 6 /* Intel 80486 */ | |
| 1921 #endif | |
| 1922 | |
| 1923 static const arch_t arch_array[]={ | |
| 1924 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1925 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1926 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
| 1927 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
| 1928 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1929 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1930 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
| 1931 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
| 1010 | 1932 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
| 1933 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, | |
| 1934 {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, | |
| 1935 {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, | |
| 1936 {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, | |
| 1937 {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, | |
| 1938 {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, | |
| 1939 {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} | |
| 0 | 1940 }; |
| 1941 | |
| 1942 #if (defined IA32) | |
| 1943 static Elf32_Half running_arch_code=EM_386; | |
| 1944 #elif (defined AMD64) | |
| 1945 static Elf32_Half running_arch_code=EM_X86_64; | |
| 1946 #elif (defined IA64) | |
| 1947 static Elf32_Half running_arch_code=EM_IA_64; | |
| 1948 #elif (defined __sparc) && (defined _LP64) | |
| 1949 static Elf32_Half running_arch_code=EM_SPARCV9; | |
| 1950 #elif (defined __sparc) && (!defined _LP64) | |
| 1951 static Elf32_Half running_arch_code=EM_SPARC; | |
| 1952 #elif (defined __powerpc64__) | |
| 1953 static Elf32_Half running_arch_code=EM_PPC64; | |
| 1954 #elif (defined __powerpc__) | |
| 1955 static Elf32_Half running_arch_code=EM_PPC; | |
| 1010 | 1956 #elif (defined ARM) |
| 1957 static Elf32_Half running_arch_code=EM_ARM; | |
| 1958 #elif (defined S390) | |
| 1959 static Elf32_Half running_arch_code=EM_S390; | |
| 1960 #elif (defined ALPHA) | |
| 1961 static Elf32_Half running_arch_code=EM_ALPHA; | |
| 1962 #elif (defined MIPSEL) | |
| 1963 static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; | |
| 1964 #elif (defined PARISC) | |
| 1965 static Elf32_Half running_arch_code=EM_PARISC; | |
| 1966 #elif (defined MIPS) | |
| 1967 static Elf32_Half running_arch_code=EM_MIPS; | |
| 1968 #elif (defined M68K) | |
| 1969 static Elf32_Half running_arch_code=EM_68K; | |
| 0 | 1970 #else |
| 1971 #error Method os::dll_load requires that one of following is defined:\ | |
| 1010 | 1972 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
| 0 | 1973 #endif |
| 1974 | |
| 1975 // Identify compatability class for VM's architecture and library's architecture | |
| 1976 // Obtain string descriptions for architectures | |
| 1977 | |
| 1978 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
| 1979 int running_arch_index=-1; | |
| 1980 | |
| 1981 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
| 1982 if (running_arch_code == arch_array[i].code) { | |
| 1983 running_arch_index = i; | |
| 1984 } | |
| 1985 if (lib_arch.code == arch_array[i].code) { | |
| 1986 lib_arch.compat_class = arch_array[i].compat_class; | |
| 1987 lib_arch.name = arch_array[i].name; | |
| 1988 } | |
| 1989 } | |
| 1990 | |
| 1991 assert(running_arch_index != -1, | |
| 1992 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
| 1993 if (running_arch_index == -1) { | |
| 1994 // Even though running architecture detection failed | |
| 1995 // we may still continue with reporting dlerror() message | |
| 1996 return NULL; | |
| 1997 } | |
| 1998 | |
| 1999 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
| 2000 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
| 2001 return NULL; | |
| 2002 } | |
| 2003 | |
| 1010 | 2004 #ifndef S390 |
| 0 | 2005 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
| 2006 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
| 2007 return NULL; | |
| 2008 } | |
| 1010 | 2009 #endif // !S390 |
| 0 | 2010 |
| 2011 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
| 2012 if ( lib_arch.name!=NULL ) { | |
| 2013 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2014 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
| 2015 lib_arch.name, arch_array[running_arch_index].name); | |
| 2016 } else { | |
| 2017 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2018 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
| 2019 lib_arch.code, | |
| 2020 arch_array[running_arch_index].name); | |
| 2021 } | |
| 2022 } | |
| 2023 | |
| 2024 return NULL; | |
| 2025 } | |
| 2026 | |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2027 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
|
2028 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
|
2029 if (result == NULL) { |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2030 ::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
|
2031 ebuf[ebuflen-1] = '\0'; |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2032 } |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2033 return result; |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2034 } |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2035 |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2036 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
|
2037 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
|
2038 if (LoadExecStackDllInVMThread) { |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2039 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
|
2040 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2041 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2042 // 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
|
2043 // 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
|
2044 // 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
|
2045 // 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
|
2046 // |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2047 // 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
|
2048 // 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
|
2049 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2050 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
|
2051 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
|
2052 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2053 while (jt) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2054 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
|
2055 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
|
2056 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
|
2057 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
|
2058 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
|
2059 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2060 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2061 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
|
2062 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2063 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2064 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2065 return result; |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2066 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2067 |
| 242 | 2068 /* |
| 2069 * glibc-2.0 libdl is not MT safe. If you are building with any glibc, | |
| 2070 * chances are you might want to run the generated bits against glibc-2.0 | |
| 2071 * libdl.so, so always use locking for any version of glibc. | |
| 2072 */ | |
| 2073 void* os::dll_lookup(void* handle, const char* name) { | |
| 2074 pthread_mutex_lock(&dl_mutex); | |
| 2075 void* res = dlsym(handle, name); | |
| 2076 pthread_mutex_unlock(&dl_mutex); | |
| 2077 return res; | |
| 2078 } | |
| 0 | 2079 |
| 2080 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2081 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
|
2082 int fd = ::open(filename, O_RDONLY); |
| 0 | 2083 if (fd == -1) { |
| 2084 return false; | |
| 2085 } | |
| 2086 | |
| 2087 char buf[32]; | |
| 2088 int bytes; | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2089 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
| 0 | 2090 st->print_raw(buf, bytes); |
| 2091 } | |
| 2092 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2093 ::close(fd); |
| 0 | 2094 |
| 2095 return true; | |
| 2096 } | |
| 2097 | |
| 2098 void os::print_dll_info(outputStream *st) { | |
| 2099 st->print_cr("Dynamic libraries:"); | |
| 2100 | |
| 2101 char fname[32]; | |
| 2102 pid_t pid = os::Linux::gettid(); | |
| 2103 | |
| 2104 jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid); | |
| 2105 | |
| 2106 if (!_print_ascii_file(fname, st)) { | |
| 2107 st->print("Can not get library information for pid = %d\n", pid); | |
| 2108 } | |
| 2109 } | |
| 2110 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2111 void os::print_os_info_brief(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2112 os::Linux::print_distro_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 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2115 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2116 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2117 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2118 } |
| 0 | 2119 |
| 2120 void os::print_os_info(outputStream* st) { | |
| 2121 st->print("OS:"); | |
| 2122 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2123 os::Linux::print_distro_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2124 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2125 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2126 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2127 // Print warning if unsafe chroot environment detected |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2128 if (unsafe_chroot_detected) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2129 st->print("WARNING!! "); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2130 st->print_cr(unstable_chroot_error); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2131 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2132 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2133 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2134 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2135 os::Posix::print_rlimit_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2136 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2137 os::Posix::print_load_average(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2138 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2139 os::Linux::print_full_memory_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2140 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2141 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2142 // Try to identify popular distros. |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2143 // Most Linux distributions have /etc/XXX-release file, which contains |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2144 // the OS version string. Some have more than one /etc/XXX-release file |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2145 // (e.g. Mandrake has both /etc/mandrake-release and /etc/redhat-release.), |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2146 // so the order is important. |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2147 void os::Linux::print_distro_info(outputStream* st) { |
| 0 | 2148 if (!_print_ascii_file("/etc/mandrake-release", st) && |
| 2149 !_print_ascii_file("/etc/sun-release", st) && | |
| 2150 !_print_ascii_file("/etc/redhat-release", st) && | |
| 2151 !_print_ascii_file("/etc/SuSE-release", st) && | |
| 2152 !_print_ascii_file("/etc/turbolinux-release", st) && | |
| 2153 !_print_ascii_file("/etc/gentoo-release", st) && | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2154 !_print_ascii_file("/etc/debian_version", st) && |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2155 !_print_ascii_file("/etc/ltib-release", st) && |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2156 !_print_ascii_file("/etc/angstrom-version", st)) { |
| 0 | 2157 st->print("Linux"); |
| 2158 } | |
| 2159 st->cr(); | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2160 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2161 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2162 void os::Linux::print_libversion_info(outputStream* st) { |
| 0 | 2163 // libc, pthread |
| 2164 st->print("libc:"); | |
| 2165 st->print(os::Linux::glibc_version()); st->print(" "); | |
| 2166 st->print(os::Linux::libpthread_version()); st->print(" "); | |
| 2167 if (os::Linux::is_LinuxThreads()) { | |
| 2168 st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed"); | |
| 2169 } | |
| 2170 st->cr(); | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2171 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2172 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2173 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
|
2174 st->print("\n/proc/meminfo:\n"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2175 _print_ascii_file("/proc/meminfo", st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2176 st->cr(); |
|
3800
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2177 } |
|
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2178 |
| 0 | 2179 void os::print_memory_info(outputStream* st) { |
| 2180 | |
| 2181 st->print("Memory:"); | |
| 2182 st->print(" %dk page", os::vm_page_size()>>10); | |
| 2183 | |
| 2184 // values in struct sysinfo are "unsigned long" | |
| 2185 struct sysinfo si; | |
| 2186 sysinfo(&si); | |
| 2187 | |
| 2188 st->print(", physical " UINT64_FORMAT "k", | |
| 2189 os::physical_memory() >> 10); | |
| 2190 st->print("(" UINT64_FORMAT "k free)", | |
| 2191 os::available_memory() >> 10); | |
| 2192 st->print(", swap " UINT64_FORMAT "k", | |
| 2193 ((jlong)si.totalswap * si.mem_unit) >> 10); | |
| 2194 st->print("(" UINT64_FORMAT "k free)", | |
| 2195 ((jlong)si.freeswap * si.mem_unit) >> 10); | |
| 2196 st->cr(); | |
| 2197 } | |
| 2198 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2199 void os::pd_print_cpu_info(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2200 st->print("\n/proc/cpuinfo:\n"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2201 if (!_print_ascii_file("/proc/cpuinfo", st)) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2202 st->print(" <Not Available>"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2203 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2204 st->cr(); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2205 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2206 |
| 0 | 2207 // Taken from /usr/include/bits/siginfo.h Supposed to be architecture specific |
| 2208 // but they're the same for all the linux arch that we support | |
| 2209 // and they're the same for solaris but there's no common place to put this. | |
| 2210 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", | |
| 2211 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", | |
| 2212 "ILL_COPROC", "ILL_BADSTK" }; | |
| 2213 | |
| 2214 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", | |
| 2215 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", | |
| 2216 "FPE_FLTINV", "FPE_FLTSUB", "FPE_FLTDEN" }; | |
| 2217 | |
| 2218 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; | |
| 2219 | |
| 2220 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; | |
| 2221 | |
| 2222 void os::print_siginfo(outputStream* st, void* siginfo) { | |
| 2223 st->print("siginfo:"); | |
| 2224 | |
| 2225 const int buflen = 100; | |
| 2226 char buf[buflen]; | |
| 2227 siginfo_t *si = (siginfo_t*)siginfo; | |
| 2228 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); | |
| 2229 if (si->si_errno != 0 && strerror_r(si->si_errno, buf, buflen) == 0) { | |
| 2230 st->print("si_errno=%s", buf); | |
| 2231 } else { | |
| 2232 st->print("si_errno=%d", si->si_errno); | |
| 2233 } | |
| 2234 const int c = si->si_code; | |
| 2235 assert(c > 0, "unexpected si_code"); | |
| 2236 switch (si->si_signo) { | |
| 2237 case SIGILL: | |
| 2238 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); | |
| 2239 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2240 break; | |
| 2241 case SIGFPE: | |
| 2242 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); | |
| 2243 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2244 break; | |
| 2245 case SIGSEGV: | |
| 2246 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); | |
| 2247 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2248 break; | |
| 2249 case SIGBUS: | |
| 2250 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); | |
| 2251 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2252 break; | |
| 2253 default: | |
| 2254 st->print(", si_code=%d", si->si_code); | |
| 2255 // no si_addr | |
| 2256 } | |
| 2257 | |
| 2258 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && | |
| 2259 UseSharedSpaces) { | |
| 2260 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 2261 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
| 2262 st->print("\n\nError accessing class data sharing archive." \ | |
| 2263 " Mapped file inaccessible during execution, " \ | |
| 2264 " possible disk/network problem."); | |
| 2265 } | |
| 2266 } | |
| 2267 st->cr(); | |
| 2268 } | |
| 2269 | |
| 2270 | |
| 2271 static void print_signal_handler(outputStream* st, int sig, | |
| 2272 char* buf, size_t buflen); | |
| 2273 | |
| 2274 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 2275 st->print_cr("Signal Handlers:"); | |
| 2276 print_signal_handler(st, SIGSEGV, buf, buflen); | |
| 2277 print_signal_handler(st, SIGBUS , buf, buflen); | |
| 2278 print_signal_handler(st, SIGFPE , buf, buflen); | |
| 2279 print_signal_handler(st, SIGPIPE, buf, buflen); | |
| 2280 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
| 2281 print_signal_handler(st, SIGILL , buf, buflen); | |
| 2282 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
| 2283 print_signal_handler(st, SR_signum, buf, buflen); | |
| 2284 print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); | |
| 2285 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
| 2286 print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); | |
| 2287 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
| 2288 } | |
| 2289 | |
| 2290 static char saved_jvm_path[MAXPATHLEN] = {0}; | |
| 2291 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2292 // Find the full path to the current module, libjvm.so |
| 1642 | 2293 void os::jvm_path(char *buf, jint buflen) { |
| 0 | 2294 // Error checking. |
| 1642 | 2295 if (buflen < MAXPATHLEN) { |
| 0 | 2296 assert(false, "must use a large-enough buffer"); |
| 2297 buf[0] = '\0'; | |
| 2298 return; | |
| 2299 } | |
| 2300 // Lazy resolve the path to current module. | |
| 2301 if (saved_jvm_path[0] != 0) { | |
| 2302 strcpy(buf, saved_jvm_path); | |
| 2303 return; | |
| 2304 } | |
| 2305 | |
| 2306 char dli_fname[MAXPATHLEN]; | |
| 2307 bool ret = dll_address_to_library_name( | |
| 2308 CAST_FROM_FN_PTR(address, os::jvm_path), | |
| 2309 dli_fname, sizeof(dli_fname), NULL); | |
| 2310 assert(ret != 0, "cannot locate libjvm"); | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2311 char *rp = realpath(dli_fname, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2312 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2313 return; |
| 0 | 2314 |
|
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
2204
diff
changeset
|
2315 if (Arguments::created_by_gamma_launcher()) { |
| 0 | 2316 // Support for the gamma launcher. Typical value for buf is |
| 2317 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
| 2318 // the right place in the string, then assume we are installed in a JDK and | |
| 2319 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
| 2320 // up the path so it looks like libjvm.so is installed there (append a | |
| 2321 // fake suffix hotspot/libjvm.so). | |
| 2322 const char *p = buf + strlen(buf) - 1; | |
| 2323 for (int count = 0; p > buf && count < 5; ++count) { | |
| 2324 for (--p; p > buf && *p != '/'; --p) | |
| 2325 /* empty */ ; | |
| 2326 } | |
| 2327 | |
| 2328 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
| 2329 // Look for JAVA_HOME in the environment. | |
| 2330 char* java_home_var = ::getenv("JAVA_HOME"); | |
| 2331 if (java_home_var != NULL && java_home_var[0] != 0) { | |
| 1642 | 2332 char* jrelib_p; |
| 2333 int len; | |
| 2334 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2335 // Check the current module name "libjvm.so". |
| 0 | 2336 p = strrchr(buf, '/'); |
| 2337 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
| 2338 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2339 rp = realpath(java_home_var, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2340 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2341 return; |
| 1642 | 2342 |
| 2343 // determine if this is a legacy image or modules image | |
| 2344 // modules image doesn't have "jre" subdirectory | |
| 2345 len = strlen(buf); | |
| 2346 jrelib_p = buf + len; | |
| 2347 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); | |
| 2348 if (0 != access(buf, F_OK)) { | |
| 2349 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); | |
| 2350 } | |
| 2351 | |
| 0 | 2352 if (0 == access(buf, F_OK)) { |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2353 // Use current module name "libjvm.so" |
| 1642 | 2354 len = strlen(buf); |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2355 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); |
| 0 | 2356 } else { |
| 2357 // Go back to path of .so | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2358 rp = realpath(dli_fname, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2359 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2360 return; |
| 0 | 2361 } |
| 2362 } | |
| 2363 } | |
| 2364 } | |
| 2365 | |
| 2366 strcpy(saved_jvm_path, buf); | |
| 2367 } | |
| 2368 | |
| 2369 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 2370 // no prefix required, not even "_" | |
| 2371 } | |
| 2372 | |
| 2373 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 2374 // no suffix required | |
| 2375 } | |
| 2376 | |
| 2377 //////////////////////////////////////////////////////////////////////////////// | |
| 2378 // sun.misc.Signal support | |
| 2379 | |
| 2380 static volatile jint sigint_count = 0; | |
| 2381 | |
| 2382 static void | |
| 2383 UserHandler(int sig, void *siginfo, void *context) { | |
| 2384 // 4511530 - sem_post is serialized and handled by the manager thread. When | |
| 2385 // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We | |
| 2386 // don't want to flood the manager thread with sem_post requests. | |
| 2387 if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) | |
| 2388 return; | |
| 2389 | |
| 2390 // Ctrl-C is pressed during error reporting, likely because the error | |
| 2391 // handler fails to abort. Let VM die immediately. | |
| 2392 if (sig == SIGINT && is_error_reported()) { | |
| 2393 os::die(); | |
| 2394 } | |
| 2395 | |
| 2396 os::signal_notify(sig); | |
| 2397 } | |
| 2398 | |
| 2399 void* os::user_handler() { | |
| 2400 return CAST_FROM_FN_PTR(void*, UserHandler); | |
| 2401 } | |
| 2402 | |
| 2403 extern "C" { | |
| 2404 typedef void (*sa_handler_t)(int); | |
| 2405 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
| 2406 } | |
| 2407 | |
| 2408 void* os::signal(int signal_number, void* handler) { | |
| 2409 struct sigaction sigAct, oldSigAct; | |
| 2410 | |
| 2411 sigfillset(&(sigAct.sa_mask)); | |
| 2412 sigAct.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 2413 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
| 2414 | |
| 2415 if (sigaction(signal_number, &sigAct, &oldSigAct)) { | |
| 2416 // -1 means registration failed | |
| 2417 return (void *)-1; | |
| 2418 } | |
| 2419 | |
| 2420 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
| 2421 } | |
| 2422 | |
| 2423 void os::signal_raise(int signal_number) { | |
| 2424 ::raise(signal_number); | |
| 2425 } | |
| 2426 | |
| 2427 /* | |
| 2428 * The following code is moved from os.cpp for making this | |
| 2429 * code platform specific, which it is by its very nature. | |
| 2430 */ | |
| 2431 | |
| 2432 // Will be modified when max signal is changed to be dynamic | |
| 2433 int os::sigexitnum_pd() { | |
| 2434 return NSIG; | |
| 2435 } | |
| 2436 | |
| 2437 // a counter for each possible signal value | |
| 2438 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
| 2439 | |
| 2440 // Linux(POSIX) specific hand shaking semaphore. | |
| 2441 static sem_t sig_sem; | |
| 2442 | |
| 2443 void os::signal_init_pd() { | |
| 2444 // Initialize signal structures | |
| 2445 ::memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
| 2446 | |
| 2447 // Initialize signal semaphore | |
| 2448 ::sem_init(&sig_sem, 0, 0); | |
| 2449 } | |
| 2450 | |
| 2451 void os::signal_notify(int sig) { | |
| 2452 Atomic::inc(&pending_signals[sig]); | |
| 2453 ::sem_post(&sig_sem); | |
| 2454 } | |
| 2455 | |
| 2456 static int check_pending_signals(bool wait) { | |
| 2457 Atomic::store(0, &sigint_count); | |
| 2458 for (;;) { | |
| 2459 for (int i = 0; i < NSIG + 1; i++) { | |
| 2460 jint n = pending_signals[i]; | |
| 2461 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 2462 return i; | |
| 2463 } | |
| 2464 } | |
| 2465 if (!wait) { | |
| 2466 return -1; | |
| 2467 } | |
| 2468 JavaThread *thread = JavaThread::current(); | |
| 2469 ThreadBlockInVM tbivm(thread); | |
| 2470 | |
| 2471 bool threadIsSuspended; | |
| 2472 do { | |
| 2473 thread->set_suspend_equivalent(); | |
| 2474 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 2475 ::sem_wait(&sig_sem); | |
| 2476 | |
| 2477 // were we externally suspended while we were waiting? | |
| 2478 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 2479 if (threadIsSuspended) { | |
| 2480 // | |
| 2481 // The semaphore has been incremented, but while we were waiting | |
| 2482 // another thread suspended us. We don't want to continue running | |
| 2483 // while suspended because that would surprise the thread that | |
| 2484 // suspended us. | |
| 2485 // | |
| 2486 ::sem_post(&sig_sem); | |
| 2487 | |
| 2488 thread->java_suspend_self(); | |
| 2489 } | |
| 2490 } while (threadIsSuspended); | |
| 2491 } | |
| 2492 } | |
| 2493 | |
| 2494 int os::signal_lookup() { | |
| 2495 return check_pending_signals(false); | |
| 2496 } | |
| 2497 | |
| 2498 int os::signal_wait() { | |
| 2499 return check_pending_signals(true); | |
| 2500 } | |
| 2501 | |
| 2502 //////////////////////////////////////////////////////////////////////////////// | |
| 2503 // Virtual Memory | |
| 2504 | |
| 2505 int os::vm_page_size() { | |
| 2506 // Seems redundant as all get out | |
| 2507 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2508 return os::Linux::page_size(); | |
| 2509 } | |
| 2510 | |
| 2511 // Solaris allocates memory by pages. | |
| 2512 int os::vm_allocation_granularity() { | |
| 2513 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2514 return os::Linux::page_size(); | |
| 2515 } | |
| 2516 | |
| 2517 // Rationale behind this function: | |
| 2518 // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable | |
| 2519 // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get | |
| 2520 // samples for JITted code. Here we create private executable mapping over the code cache | |
| 2521 // and then we can use standard (well, almost, as mapping can change) way to provide | |
| 2522 // info for the reporting script by storing timestamp and location of symbol | |
| 2523 void linux_wrap_code(char* base, size_t size) { | |
| 2524 static volatile jint cnt = 0; | |
| 2525 | |
| 2526 if (!UseOprofile) { | |
| 2527 return; | |
| 2528 } | |
| 2529 | |
|
1497
96d554193f72
6944822: Fix for 6938627 exposes problem with hard-coded buffer sizes
coleenp
parents:
1353
diff
changeset
|
2530 char buf[PATH_MAX+1]; |
| 0 | 2531 int num = Atomic::add(1, &cnt); |
| 2532 | |
|
1353
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
parents:
1325
diff
changeset
|
2533 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
|
2534 os::get_temp_directory(), os::current_process_id(), num); |
| 0 | 2535 unlink(buf); |
| 2536 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2537 int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
| 0 | 2538 |
| 2539 if (fd != -1) { | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2540 off_t rv = ::lseek(fd, size-2, SEEK_SET); |
| 0 | 2541 if (rv != (off_t)-1) { |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2542 if (::write(fd, "", 1) == 1) { |
| 0 | 2543 mmap(base, size, |
| 2544 PROT_READ|PROT_WRITE|PROT_EXEC, | |
| 2545 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); | |
| 2546 } | |
| 2547 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2548 ::close(fd); |
| 0 | 2549 unlink(buf); |
| 2550 } | |
| 2551 } | |
| 2552 | |
| 2553 // NOTE: Linux kernel does not really reserve the pages for us. | |
| 2554 // All it does is to check if there are enough free pages | |
| 2555 // left at the time of mmap(). This could be a potential | |
| 2556 // problem. | |
| 6197 | 2557 bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
| 656 | 2558 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
| 2559 uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, | |
| 0 | 2560 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
| 3885 | 2561 if (res != (uintptr_t) MAP_FAILED) { |
| 2562 if (UseNUMAInterleaving) { | |
| 2563 numa_make_global(addr, size); | |
| 2564 } | |
| 2565 return true; | |
| 2566 } | |
| 2567 return false; | |
| 0 | 2568 } |
| 2569 | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2570 // 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
|
2571 #ifndef MAP_HUGETLB |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2572 #define MAP_HUGETLB 0x40000 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2573 #endif |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2574 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2575 // 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
|
2576 #ifndef MADV_HUGEPAGE |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2577 #define MADV_HUGEPAGE 14 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2578 #endif |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2579 |
| 6197 | 2580 bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
| 656 | 2581 bool exec) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2582 if (UseHugeTLBFS && alignment_hint > (size_t)vm_page_size()) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2583 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2584 uintptr_t res = |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2585 (uintptr_t) ::mmap(addr, size, prot, |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2586 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS|MAP_HUGETLB, |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2587 -1, 0); |
| 3885 | 2588 if (res != (uintptr_t) MAP_FAILED) { |
| 2589 if (UseNUMAInterleaving) { | |
| 2590 numa_make_global(addr, size); | |
| 2591 } | |
| 2592 return true; | |
| 2593 } | |
|
3913
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2594 // Fall through and try to use small pages |
|
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2595 } |
|
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2596 |
|
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2597 if (commit_memory(addr, size, exec)) { |
|
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2598 realign_memory(addr, size, alignment_hint); |
|
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2599 return true; |
|
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2600 } |
|
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
parents:
3887
diff
changeset
|
2601 return false; |
| 0 | 2602 } |
| 2603 | |
| 6197 | 2604 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2605 if (UseHugeTLBFS && alignment_hint > (size_t)vm_page_size()) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2606 // 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
|
2607 // 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
|
2608 ::madvise(addr, bytes, MADV_HUGEPAGE); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2609 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2610 } |
| 141 | 2611 |
| 6197 | 2612 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
|
2613 // 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
|
2614 // 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
|
2615 // 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
|
2616 // 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
|
2617 // allow that in any case. |
|
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2618 if (alignment_hint <= (size_t)os::vm_page_size() || !UseSHM) { |
|
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2619 commit_memory(addr, bytes, alignment_hint, false); |
|
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
parents:
5909
diff
changeset
|
2620 } |
| 141 | 2621 } |
| 2622 | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2623 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
|
2624 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
|
2625 } |
| 141 | 2626 |
| 2627 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { | |
| 2628 Linux::numa_tonode_memory(addr, bytes, lgrp_hint); | |
| 2629 } | |
| 2630 | |
| 2631 bool os::numa_topology_changed() { return false; } | |
| 2632 | |
| 2633 size_t os::numa_get_groups_num() { | |
| 2634 int max_node = Linux::numa_max_node(); | |
| 2635 return max_node > 0 ? max_node + 1 : 1; | |
| 2636 } | |
| 2637 | |
| 2638 int os::numa_get_group_id() { | |
| 2639 int cpu_id = Linux::sched_getcpu(); | |
| 2640 if (cpu_id != -1) { | |
| 2641 int lgrp_id = Linux::get_node_by_cpu(cpu_id); | |
| 2642 if (lgrp_id != -1) { | |
| 2643 return lgrp_id; | |
| 2644 } | |
| 0 | 2645 } |
| 2646 return 0; | |
| 2647 } | |
| 2648 | |
| 141 | 2649 size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
| 2650 for (size_t i = 0; i < size; i++) { | |
| 2651 ids[i] = i; | |
| 2652 } | |
| 2653 return size; | |
| 2654 } | |
| 2655 | |
| 0 | 2656 bool os::get_page_info(char *start, page_info* info) { |
| 2657 return false; | |
| 2658 } | |
| 2659 | |
| 2660 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2661 return end; | |
| 2662 } | |
| 2663 | |
| 3826 | 2664 |
| 2665 int os::Linux::sched_getcpu_syscall(void) { | |
| 2666 unsigned int cpu; | |
| 2667 int retval = -1; | |
| 2668 | |
| 2669 #if defined(IA32) | |
|
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2670 # ifndef SYS_getcpu |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2671 # define SYS_getcpu 318 |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2672 # endif |
| 3826 | 2673 retval = syscall(SYS_getcpu, &cpu, NULL, NULL); |
| 2674 #elif defined(AMD64) | |
|
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2675 // 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
|
2676 // to be able to compile on old linuxes. |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2677 # define __NR_vgetcpu 2 |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2678 # define VSYSCALL_START (-10UL << 20) |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2679 # define VSYSCALL_SIZE 1024 |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
parents:
3885
diff
changeset
|
2680 # define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) |
| 3826 | 2681 typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache); |
| 2682 vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu); | |
| 2683 retval = vgetcpu(&cpu, NULL, NULL); | |
| 2684 #endif | |
| 2685 | |
| 2686 return (retval == -1) ? retval : cpu; | |
| 2687 } | |
| 2688 | |
| 2191 | 2689 // Something to do with the numa-aware allocator needs these symbols |
| 2690 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { } | |
| 2691 extern "C" JNIEXPORT void numa_error(char *where) { } | |
| 2692 extern "C" JNIEXPORT int fork1() { return fork(); } | |
| 141 | 2693 |
|
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2694 |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2695 // 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
|
2696 // 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
|
2697 // 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
|
2698 // we should use the base version. |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2699 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
|
2700 void *f = dlvsym(handle, name, "libnuma_1.1"); |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2701 if (f == NULL) { |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2702 f = dlsym(handle, name); |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2703 } |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2704 return f; |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2705 } |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2706 |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2707 bool os::Linux::libnuma_init() { |
| 141 | 2708 // sched_getcpu() should be in libc. |
| 2709 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, | |
| 2710 dlsym(RTLD_DEFAULT, "sched_getcpu"))); | |
| 2711 | |
| 3826 | 2712 // If it's not, try a direct syscall. |
| 2713 if (sched_getcpu() == -1) | |
| 2714 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall)); | |
| 2715 | |
| 141 | 2716 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
|
2717 void *handle = dlopen("libnuma.so.1", RTLD_LAZY); |
| 141 | 2718 if (handle != NULL) { |
| 2719 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
|
2720 libnuma_dlsym(handle, "numa_node_to_cpus"))); |
| 141 | 2721 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
|
2722 libnuma_dlsym(handle, "numa_max_node"))); |
| 141 | 2723 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
|
2724 libnuma_dlsym(handle, "numa_available"))); |
| 141 | 2725 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
|
2726 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
|
2727 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
|
2728 libnuma_dlsym(handle, "numa_interleave_memory"))); |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2729 |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2730 |
| 141 | 2731 if (numa_available() != -1) { |
|
763
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
parents:
761
diff
changeset
|
2732 set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes")); |
| 141 | 2733 // Create a cpu -> node mapping |
| 6197 | 2734 _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(0, true); |
| 141 | 2735 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
|
2736 return true; |
| 141 | 2737 } |
| 2738 } | |
| 2739 } | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2740 return false; |
| 141 | 2741 } |
| 2742 | |
| 2743 // rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id. | |
| 2744 // The table is later used in get_node_by_cpu(). | |
| 2745 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
|
2746 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
|
2747 // 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
|
2748 // 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
|
2749 // 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
|
2750 // 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
|
2751 // 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
|
2752 // in the library. |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2753 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
|
2754 |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2755 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
|
2756 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
|
2757 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
|
2758 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
|
2759 |
| 141 | 2760 cpu_to_node()->clear(); |
| 2761 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
|
2762 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
|
2763 |
| 6197 | 2764 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
|
2765 for (size_t i = 0; i < node_num; i++) { |
| 141 | 2766 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
|
2767 for (size_t j = 0; j < cpu_map_valid_size; j++) { |
| 141 | 2768 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
|
2769 for (size_t k = 0; k < BitsPerCLong; k++) { |
| 141 | 2770 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
|
2771 cpu_to_node()->at_put(j * BitsPerCLong + k, i); |
| 141 | 2772 } |
| 2773 } | |
| 2774 } | |
| 2775 } | |
| 2776 } | |
| 2777 } | |
| 6197 | 2778 FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal); |
| 141 | 2779 } |
| 2780 | |
| 2781 int os::Linux::get_node_by_cpu(int cpu_id) { | |
| 2782 if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) { | |
| 2783 return cpu_to_node()->at(cpu_id); | |
| 2784 } | |
| 2785 return -1; | |
| 2786 } | |
| 2787 | |
| 2788 GrowableArray<int>* os::Linux::_cpu_to_node; | |
| 2789 os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu; | |
| 2790 os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus; | |
| 2791 os::Linux::numa_max_node_func_t os::Linux::_numa_max_node; | |
| 2792 os::Linux::numa_available_func_t os::Linux::_numa_available; | |
| 2793 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
|
2794 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2795 unsigned long* os::Linux::_numa_all_nodes; |
| 141 | 2796 |
| 6197 | 2797 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
|
2798 uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2799 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2800 return res != (uintptr_t) MAP_FAILED; |
| 0 | 2801 } |
| 2802 | |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2803 // 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
|
2804 // 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
|
2805 // 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
|
2806 // 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
|
2807 // 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
|
2808 // 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
|
2809 // |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2810 // 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
|
2811 // 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
|
2812 // 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
|
2813 // 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
|
2814 // 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
|
2815 // create_stack_guard_pages() is called. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2816 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2817 // Find the bounds of the stack mapping. Return true for success. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2818 // |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2819 // 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
|
2820 // 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
|
2821 // 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
|
2822 // 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
|
2823 |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2824 static |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2825 bool get_stack_bounds(uintptr_t *bottom, uintptr_t *top) { |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2826 |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2827 char buf[128]; |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2828 int fd, sz; |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2829 |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2830 if ((fd = ::open("/proc/self/maps", O_RDONLY)) < 0) { |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2831 return false; |
|
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2832 } |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2833 |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2834 const char kw[] = "[stack]"; |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2835 const int kwlen = sizeof(kw)-1; |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2836 |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2837 // Address part of /proc/self/maps couldn't be more than 128 bytes |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2838 while ((sz = os::get_line_chars(fd, buf, sizeof(buf))) > 0) { |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2839 if (sz > kwlen && ::memcmp(buf+sz-kwlen, kw, kwlen) == 0) { |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2840 // Extract addresses |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2841 if (sscanf(buf, "%" SCNxPTR "-%" SCNxPTR, bottom, top) == 2) { |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2842 uintptr_t sp = (uintptr_t) __builtin_frame_address(0); |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2843 if (sp >= *bottom && sp <= *top) { |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2844 ::close(fd); |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2845 return true; |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2846 } |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2847 } |
|
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2848 } |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2849 } |
|
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2850 |
|
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2851 ::close(fd); |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2852 return false; |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2853 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2854 |
|
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
2855 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2856 // 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
|
2857 // 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
|
2858 // 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
|
2859 // munmap() the guard pages we don't leave a hole in the stack |
|
1750
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2860 // mapping. This only affects the main/initial thread, but guard |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2861 // against future OS changes |
| 6197 | 2862 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2863 uintptr_t stack_extent, stack_base; |
|
1750
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2864 bool chk_bounds = NOT_DEBUG(os::Linux::is_initial_thread()) DEBUG_ONLY(true); |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2865 if (chk_bounds && get_stack_bounds(&stack_extent, &stack_base)) { |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2866 assert(os::Linux::is_initial_thread(), |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2867 "growable stack in non-initial thread"); |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2868 if (stack_extent < (uintptr_t)addr) |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2869 ::munmap((void*)stack_extent, (uintptr_t)addr - stack_extent); |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2870 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2871 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2872 return os::commit_memory(addr, size); |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2873 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2874 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2875 // 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
|
2876 // 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
|
2877 // affects the main/initial thread, but guard against future OS changes |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2878 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
|
2879 uintptr_t stack_extent, stack_base; |
|
1750
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2880 bool chk_bounds = NOT_DEBUG(os::Linux::is_initial_thread()) DEBUG_ONLY(true); |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2881 if (chk_bounds && get_stack_bounds(&stack_extent, &stack_base)) { |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2882 assert(os::Linux::is_initial_thread(), |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2883 "growable stack in non-initial thread"); |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
2884 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2885 return ::munmap(addr, size) == 0; |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2886 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2887 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2888 return os::uncommit_memory(addr, size); |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2889 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
2890 |
| 0 | 2891 static address _highest_vm_reserved_address = NULL; |
| 2892 | |
| 2893 // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory | |
| 2894 // at 'requested_addr'. If there are existing memory mappings at the same | |
| 2895 // location, however, they will be overwritten. If 'fixed' is false, | |
| 2896 // 'requested_addr' is only treated as a hint, the return value may or | |
| 2897 // may not start from the requested address. Unlike Linux mmap(), this | |
| 2898 // function returns NULL to indicate failure. | |
| 2899 static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { | |
| 2900 char * addr; | |
| 2901 int flags; | |
| 2902 | |
| 2903 flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; | |
| 2904 if (fixed) { | |
| 2905 assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address"); | |
| 2906 flags |= MAP_FIXED; | |
| 2907 } | |
| 2908 | |
| 656 | 2909 // Map uncommitted pages PROT_READ and PROT_WRITE, change access |
| 2910 // to PROT_EXEC if executable when we commit the page. | |
| 2911 addr = (char*)::mmap(requested_addr, bytes, PROT_READ|PROT_WRITE, | |
| 0 | 2912 flags, -1, 0); |
| 2913 | |
| 2914 if (addr != MAP_FAILED) { | |
| 2915 // anon_mmap() should only get called during VM initialization, | |
| 2916 // don't need lock (actually we can skip locking even it can be called | |
| 2917 // from multiple threads, because _highest_vm_reserved_address is just a | |
| 2918 // hint about the upper limit of non-stack memory regions.) | |
| 2919 if ((address)addr + bytes > _highest_vm_reserved_address) { | |
| 2920 _highest_vm_reserved_address = (address)addr + bytes; | |
| 2921 } | |
| 2922 } | |
| 2923 | |
| 2924 return addr == MAP_FAILED ? NULL : addr; | |
| 2925 } | |
| 2926 | |
| 2927 // Don't update _highest_vm_reserved_address, because there might be memory | |
| 2928 // regions above addr + size. If so, releasing a memory region only creates | |
| 2929 // a hole in the address space, it doesn't help prevent heap-stack collision. | |
| 2930 // | |
| 2931 static int anon_munmap(char * addr, size_t size) { | |
| 2932 return ::munmap(addr, size) == 0; | |
| 2933 } | |
| 2934 | |
| 6197 | 2935 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
| 0 | 2936 size_t alignment_hint) { |
| 2937 return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); | |
| 2938 } | |
| 2939 | |
| 6197 | 2940 bool os::pd_release_memory(char* addr, size_t size) { |
| 0 | 2941 return anon_munmap(addr, size); |
| 2942 } | |
| 2943 | |
| 2944 static address highest_vm_reserved_address() { | |
| 2945 return _highest_vm_reserved_address; | |
| 2946 } | |
| 2947 | |
| 2948 static bool linux_mprotect(char* addr, size_t size, int prot) { | |
| 2949 // Linux wants the mprotect address argument to be page aligned. | |
| 2950 char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size()); | |
| 2951 | |
| 2952 // According to SUSv3, mprotect() should only be used with mappings | |
| 2953 // established by mmap(), and mmap() always maps whole pages. Unaligned | |
| 2954 // 'addr' likely indicates problem in the VM (e.g. trying to change | |
| 2955 // protection of malloc'ed or statically allocated memory). Check the | |
| 2956 // caller if you hit this assert. | |
| 2957 assert(addr == bottom, "sanity check"); | |
| 2958 | |
| 2959 size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size()); | |
| 2960 return ::mprotect(bottom, size, prot) == 0; | |
| 2961 } | |
| 2962 | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2963 // Set protections specified |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2964 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
|
2965 bool is_committed) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2966 unsigned int p = 0; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2967 switch (prot) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2968 case MEM_PROT_NONE: p = PROT_NONE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2969 case MEM_PROT_READ: p = PROT_READ; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2970 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2971 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
|
2972 default: |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2973 ShouldNotReachHere(); |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2974 } |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2975 // is_committed is unused. |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
2976 return linux_mprotect(addr, bytes, p); |
| 0 | 2977 } |
| 2978 | |
| 2979 bool os::guard_memory(char* addr, size_t size) { | |
| 2980 return linux_mprotect(addr, size, PROT_NONE); | |
| 2981 } | |
| 2982 | |
| 2983 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
|
2984 return linux_mprotect(addr, size, PROT_READ|PROT_WRITE); |
| 0 | 2985 } |
| 2986 | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2987 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
|
2988 bool result = false; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2989 void *p = mmap (NULL, page_size, PROT_READ|PROT_WRITE, |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2990 MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB, |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2991 -1, 0); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2992 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2993 if (p != (void *) -1) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2994 // 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
|
2995 FILE *fp = fopen("/proc/self/maps", "r"); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2996 if (fp) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2997 while (!feof(fp)) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2998 char chars[257]; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2999 long x = 0; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3000 if (fgets(chars, sizeof(chars), fp)) { |
| 3358 | 3001 if (sscanf(chars, "%lx-%*x", &x) == 1 |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3002 && x == (long)p) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3003 if (strstr (chars, "hugepage")) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3004 result = true; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3005 break; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3006 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3007 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3008 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3009 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3010 fclose(fp); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3011 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3012 munmap (p, page_size); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3013 if (result) |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3014 return true; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3015 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3016 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3017 if (warn) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3018 warning("HugeTLBFS is not supported by the operating system."); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3019 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3020 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3021 return result; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3022 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3023 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3024 /* |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3025 * 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
|
3026 * |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3027 * From the coredump_filter documentation: |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3028 * |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3029 * - (bit 0) anonymous private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3030 * - (bit 1) anonymous shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3031 * - (bit 2) file-backed private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3032 * - (bit 3) file-backed shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3033 * - (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
|
3034 * effective only if the bit 2 is cleared) |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3035 * - (bit 5) hugetlb private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3036 * - (bit 6) hugetlb shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3037 */ |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3038 static void set_coredump_filter(void) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3039 FILE *f; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3040 long cdm; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3041 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3042 if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3043 return; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3044 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3045 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3046 if (fscanf(f, "%lx", &cdm) != 1) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3047 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3048 return; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3049 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3050 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3051 rewind(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3052 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3053 if ((cdm & LARGEPAGES_BIT) == 0) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3054 cdm |= LARGEPAGES_BIT; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3055 fprintf(f, "%#lx", cdm); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3056 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3057 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3058 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3059 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3060 |
| 0 | 3061 // Large page support |
| 3062 | |
| 3063 static size_t _large_page_size = 0; | |
| 3064 | |
|
3318
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3065 void os::large_page_init() { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3066 if (!UseLargePages) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3067 UseHugeTLBFS = false; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3068 UseSHM = false; |
|
3318
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3069 return; |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3070 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3071 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3072 if (FLAG_IS_DEFAULT(UseHugeTLBFS) && FLAG_IS_DEFAULT(UseSHM)) { |
|
3318
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3073 // If UseLargePages is specified on the command line try both methods, |
|
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3074 // if it's default, then try only HugeTLBFS. |
|
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3075 if (FLAG_IS_DEFAULT(UseLargePages)) { |
|
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3076 UseHugeTLBFS = true; |
|
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3077 } else { |
|
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3078 UseHugeTLBFS = UseSHM = true; |
|
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
3079 } |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3080 } |
| 0 | 3081 |
| 3082 if (LargePageSizeInBytes) { | |
| 3083 _large_page_size = LargePageSizeInBytes; | |
| 3084 } else { | |
| 3085 // large_page_size on Linux is used to round up heap size. x86 uses either | |
| 3086 // 2M or 4M page, depending on whether PAE (Physical Address Extensions) | |
| 3087 // mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. IA64 can use | |
| 3088 // page as large as 256M. | |
| 3089 // | |
| 3090 // Here we try to figure out page size by parsing /proc/meminfo and looking | |
| 3091 // for a line with the following format: | |
| 3092 // Hugepagesize: 2048 kB | |
| 3093 // | |
| 3094 // If we can't determine the value (e.g. /proc is not mounted, or the text | |
| 3095 // format has been changed), we'll use the largest page size supported by | |
| 3096 // the processor. | |
| 3097 | |
| 1010 | 3098 #ifndef ZERO |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
3099 _large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M) |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
3100 ARM_ONLY(2 * M) PPC_ONLY(4 * M); |
| 1010 | 3101 #endif // ZERO |
| 0 | 3102 |
| 3103 FILE *fp = fopen("/proc/meminfo", "r"); | |
| 3104 if (fp) { | |
| 3105 while (!feof(fp)) { | |
| 3106 int x = 0; | |
| 3107 char buf[16]; | |
| 3108 if (fscanf(fp, "Hugepagesize: %d", &x) == 1) { | |
| 3109 if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) { | |
| 3110 _large_page_size = x * K; | |
| 3111 break; | |
| 3112 } | |
| 3113 } else { | |
| 3114 // skip to next line | |
| 3115 for (;;) { | |
| 3116 int ch = fgetc(fp); | |
| 3117 if (ch == EOF || ch == (int)'\n') break; | |
| 3118 } | |
| 3119 } | |
| 3120 } | |
| 3121 fclose(fp); | |
| 3122 } | |
| 3123 } | |
| 3124 | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3125 // print a warning if any large page related flag is specified on command line |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3126 bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3127 |
| 0 | 3128 const size_t default_page_size = (size_t)Linux::page_size(); |
| 3129 if (_large_page_size > default_page_size) { | |
| 3130 _page_sizes[0] = _large_page_size; | |
| 3131 _page_sizes[1] = default_page_size; | |
| 3132 _page_sizes[2] = 0; | |
| 3133 } | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3134 UseHugeTLBFS = UseHugeTLBFS && |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3135 Linux::hugetlbfs_sanity_check(warn_on_failure, _large_page_size); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3136 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3137 if (UseHugeTLBFS) |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3138 UseSHM = false; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3139 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3140 UseLargePages = UseHugeTLBFS || UseSHM; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3141 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3142 set_coredump_filter(); |
| 0 | 3143 } |
| 3144 | |
| 3145 #ifndef SHM_HUGETLB | |
| 3146 #define SHM_HUGETLB 04000 | |
| 3147 #endif | |
| 3148 | |
| 656 | 3149 char* os::reserve_memory_special(size_t bytes, char* req_addr, bool exec) { |
| 3150 // "exec" is passed in but not used. Creating the shared image for | |
| 3151 // 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
|
3152 assert(UseLargePages && UseSHM, "only for SHM large pages"); |
| 0 | 3153 |
| 3154 key_t key = IPC_PRIVATE; | |
| 3155 char *addr; | |
| 3156 | |
| 3157 bool warn_on_failure = UseLargePages && | |
| 3158 (!FLAG_IS_DEFAULT(UseLargePages) || | |
| 3159 !FLAG_IS_DEFAULT(LargePageSizeInBytes) | |
| 3160 ); | |
| 3161 char msg[128]; | |
| 3162 | |
| 3163 // Create a large shared memory region to attach to based on size. | |
| 3164 // Currently, size is the total size of the heap | |
| 3165 int shmid = shmget(key, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); | |
| 3166 if (shmid == -1) { | |
| 3167 // Possible reasons for shmget failure: | |
| 3168 // 1. shmmax is too small for Java heap. | |
| 3169 // > check shmmax value: cat /proc/sys/kernel/shmmax | |
| 3170 // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax | |
| 3171 // 2. not enough large page memory. | |
| 3172 // > check available large pages: cat /proc/meminfo | |
| 3173 // > increase amount of large pages: | |
| 3174 // echo new_value > /proc/sys/vm/nr_hugepages | |
| 3175 // Note 1: different Linux may use different name for this property, | |
| 3176 // e.g. on Redhat AS-3 it is "hugetlb_pool". | |
| 3177 // Note 2: it's possible there's enough physical memory available but | |
| 3178 // they are so fragmented after a long run that they can't | |
| 3179 // coalesce into large pages. Try to reserve large pages when | |
| 3180 // the system is still "fresh". | |
| 3181 if (warn_on_failure) { | |
| 3182 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
| 3183 warning(msg); | |
| 3184 } | |
| 3185 return NULL; | |
| 3186 } | |
| 3187 | |
| 3188 // attach to the region | |
|
1537
79bf863697eb
6951686: Using large pages on Linux prevents zero based compressed oops
kvn
parents:
1500
diff
changeset
|
3189 addr = (char*)shmat(shmid, req_addr, 0); |
| 0 | 3190 int err = errno; |
| 3191 | |
| 3192 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
| 3193 // will be deleted when it's detached by shmdt() or when the process | |
| 3194 // terminates. If shmat() is not successful this will remove the shared | |
| 3195 // segment immediately. | |
| 3196 shmctl(shmid, IPC_RMID, NULL); | |
| 3197 | |
| 3198 if ((intptr_t)addr == -1) { | |
| 3199 if (warn_on_failure) { | |
| 3200 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
| 3201 warning(msg); | |
| 3202 } | |
| 3203 return NULL; | |
| 3204 } | |
| 3205 | |
| 3885 | 3206 if ((addr != NULL) && UseNUMAInterleaving) { |
| 3207 numa_make_global(addr, bytes); | |
| 3208 } | |
| 3209 | |
|
8711
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3210 // The memory is committed |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3211 address pc = CALLER_PC; |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3212 MemTracker::record_virtual_memory_reserve((address)addr, bytes, pc); |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3213 MemTracker::record_virtual_memory_commit((address)addr, bytes, pc); |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3214 |
| 0 | 3215 return addr; |
| 3216 } | |
| 3217 | |
| 3218 bool os::release_memory_special(char* base, size_t bytes) { | |
| 3219 // detaching the SHM segment will also delete it, see reserve_memory_special() | |
| 3220 int rslt = shmdt(base); | |
|
8711
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3221 if (rslt == 0) { |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3222 MemTracker::record_virtual_memory_uncommit((address)base, bytes); |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3223 MemTracker::record_virtual_memory_release((address)base, bytes); |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3224 return true; |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3225 } else { |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3226 return false; |
|
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3227 } |
| 0 | 3228 } |
| 3229 | |
| 3230 size_t os::large_page_size() { | |
| 3231 return _large_page_size; | |
| 3232 } | |
| 3233 | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3234 // HugeTLBFS allows application to commit large page memory on demand; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3235 // with SysV SHM the entire memory region must be allocated as shared |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3236 // memory. |
| 0 | 3237 bool os::can_commit_large_page_memory() { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3238 return UseHugeTLBFS; |
| 0 | 3239 } |
| 3240 | |
|
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3241 bool os::can_execute_large_page_memory() { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3242 return UseHugeTLBFS; |
|
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3243 } |
|
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3244 |
| 0 | 3245 // Reserve memory at an arbitrary address, only if that area is |
| 3246 // available (and not reserved for something else). | |
| 3247 | |
| 6197 | 3248 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
| 0 | 3249 const int max_tries = 10; |
| 3250 char* base[max_tries]; | |
| 3251 size_t size[max_tries]; | |
| 3252 const size_t gap = 0x000000; | |
| 3253 | |
| 3254 // Assert only that the size is a multiple of the page size, since | |
| 3255 // that's all that mmap requires, and since that's all we really know | |
| 3256 // about at this low abstraction level. If we need higher alignment, | |
| 3257 // we can either pass an alignment to this method or verify alignment | |
| 3258 // in one of the methods further up the call chain. See bug 5044738. | |
| 3259 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
| 3260 | |
| 3261 // Repeatedly allocate blocks until the block is allocated at the | |
| 3262 // right spot. Give up after max_tries. Note that reserve_memory() will | |
| 3263 // automatically update _highest_vm_reserved_address if the call is | |
| 3264 // successful. The variable tracks the highest memory address every reserved | |
| 3265 // by JVM. It is used to detect heap-stack collision if running with | |
| 3266 // fixed-stack LinuxThreads. Because here we may attempt to reserve more | |
| 3267 // space than needed, it could confuse the collision detecting code. To | |
| 3268 // solve the problem, save current _highest_vm_reserved_address and | |
| 3269 // calculate the correct value before return. | |
| 3270 address old_highest = _highest_vm_reserved_address; | |
| 3271 | |
| 3272 // Linux mmap allows caller to pass an address as hint; give it a try first, | |
| 3273 // if kernel honors the hint then we can return immediately. | |
| 3274 char * addr = anon_mmap(requested_addr, bytes, false); | |
| 3275 if (addr == requested_addr) { | |
| 3276 return requested_addr; | |
| 3277 } | |
| 3278 | |
| 3279 if (addr != NULL) { | |
| 3280 // mmap() is successful but it fails to reserve at the requested address | |
| 3281 anon_munmap(addr, bytes); | |
| 3282 } | |
| 3283 | |
| 3284 int i; | |
| 3285 for (i = 0; i < max_tries; ++i) { | |
| 3286 base[i] = reserve_memory(bytes); | |
| 3287 | |
| 3288 if (base[i] != NULL) { | |
| 3289 // Is this the block we wanted? | |
| 3290 if (base[i] == requested_addr) { | |
| 3291 size[i] = bytes; | |
| 3292 break; | |
| 3293 } | |
| 3294 | |
| 3295 // Does this overlap the block we wanted? Give back the overlapped | |
| 3296 // parts and try again. | |
| 3297 | |
| 3298 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
| 3299 if (top_overlap >= 0 && top_overlap < bytes) { | |
| 3300 unmap_memory(base[i], top_overlap); | |
| 3301 base[i] += top_overlap; | |
| 3302 size[i] = bytes - top_overlap; | |
| 3303 } else { | |
| 3304 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
| 3305 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
| 3306 unmap_memory(requested_addr, bottom_overlap); | |
| 3307 size[i] = bytes - bottom_overlap; | |
| 3308 } else { | |
| 3309 size[i] = bytes; | |
| 3310 } | |
| 3311 } | |
| 3312 } | |
| 3313 } | |
| 3314 | |
| 3315 // Give back the unused reserved pieces. | |
| 3316 | |
| 3317 for (int j = 0; j < i; ++j) { | |
| 3318 if (base[j] != NULL) { | |
| 3319 unmap_memory(base[j], size[j]); | |
| 3320 } | |
| 3321 } | |
| 3322 | |
| 3323 if (i < max_tries) { | |
| 3324 _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); | |
| 3325 return requested_addr; | |
| 3326 } else { | |
| 3327 _highest_vm_reserved_address = old_highest; | |
| 3328 return NULL; | |
| 3329 } | |
| 3330 } | |
| 3331 | |
| 3332 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 3333 return ::read(fd, buf, nBytes); | |
| 3334 } | |
| 3335 | |
| 3336 // TODO-FIXME: reconcile Solaris' os::sleep with the linux variation. | |
| 3337 // Solaris uses poll(), linux uses park(). | |
| 3338 // Poll() is likely a better choice, assuming that Thread.interrupt() | |
| 3339 // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with | |
| 3340 // SIGSEGV, see 4355769. | |
| 3341 | |
| 3342 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
| 3343 assert(thread == Thread::current(), "thread consistency check"); | |
| 3344 | |
| 3345 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3346 slp->reset() ; | |
| 3347 OrderAccess::fence() ; | |
| 3348 | |
| 3349 if (interruptible) { | |
| 3350 jlong prevtime = javaTimeNanos(); | |
| 3351 | |
| 3352 for (;;) { | |
| 3353 if (os::is_interrupted(thread, true)) { | |
| 3354 return OS_INTRPT; | |
| 3355 } | |
| 3356 | |
| 3357 jlong newtime = javaTimeNanos(); | |
| 3358 | |
| 3359 if (newtime - prevtime < 0) { | |
| 3360 // time moving backwards, should only happen if no monotonic clock | |
| 3361 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3362 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3363 } else { | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3364 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3365 } |
| 3366 | |
| 3367 if(millis <= 0) { | |
| 3368 return OS_OK; | |
| 3369 } | |
| 3370 | |
| 3371 prevtime = newtime; | |
| 3372 | |
| 3373 { | |
| 3374 assert(thread->is_Java_thread(), "sanity check"); | |
| 3375 JavaThread *jt = (JavaThread *) thread; | |
| 3376 ThreadBlockInVM tbivm(jt); | |
| 3377 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
| 3378 | |
| 3379 jt->set_suspend_equivalent(); | |
| 3380 // cleared by handle_special_suspend_equivalent_condition() or | |
| 3381 // java_suspend_self() via check_and_wait_while_suspended() | |
| 3382 | |
| 3383 slp->park(millis); | |
| 3384 | |
| 3385 // were we externally suspended while we were waiting? | |
| 3386 jt->check_and_wait_while_suspended(); | |
| 3387 } | |
| 3388 } | |
| 3389 } else { | |
| 3390 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3391 jlong prevtime = javaTimeNanos(); | |
| 3392 | |
| 3393 for (;;) { | |
| 3394 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on | |
| 3395 // the 1st iteration ... | |
| 3396 jlong newtime = javaTimeNanos(); | |
| 3397 | |
| 3398 if (newtime - prevtime < 0) { | |
| 3399 // time moving backwards, should only happen if no monotonic clock | |
| 3400 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3401 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3402 } else { | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3403 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3404 } |
| 3405 | |
| 3406 if(millis <= 0) break ; | |
| 3407 | |
| 3408 prevtime = newtime; | |
| 3409 slp->park(millis); | |
| 3410 } | |
| 3411 return OS_OK ; | |
| 3412 } | |
| 3413 } | |
| 3414 | |
| 3415 int os::naked_sleep() { | |
| 3416 // %% make the sleep time an integer flag. for now use 1 millisec. | |
| 3417 return os::sleep(Thread::current(), 1, false); | |
| 3418 } | |
| 3419 | |
| 3420 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 3421 void os::infinite_sleep() { | |
| 3422 while (true) { // sleep forever ... | |
| 3423 ::sleep(100); // ... 100 seconds at a time | |
| 3424 } | |
| 3425 } | |
| 3426 | |
| 3427 // Used to convert frequent JVM_Yield() to nops | |
| 3428 bool os::dont_yield() { | |
| 3429 return DontYieldALot; | |
| 3430 } | |
| 3431 | |
| 3432 void os::yield() { | |
| 3433 sched_yield(); | |
| 3434 } | |
| 3435 | |
| 3436 os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} | |
| 3437 | |
| 3438 void os::yield_all(int attempts) { | |
| 3439 // Yields to all threads, including threads with lower priorities | |
| 3440 // Threads on Linux are all with same priority. The Solaris style | |
| 3441 // os::yield_all() with nanosleep(1ms) is not necessary. | |
| 3442 sched_yield(); | |
| 3443 } | |
| 3444 | |
| 3445 // Called from the tight loops to possibly influence time-sharing heuristics | |
| 3446 void os::loop_breaker(int attempts) { | |
| 3447 os::yield_all(attempts); | |
| 3448 } | |
| 3449 | |
| 3450 //////////////////////////////////////////////////////////////////////////////// | |
| 3451 // thread priority support | |
| 3452 | |
| 3453 // Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER | |
| 3454 // only supports dynamic priority, static priority must be zero. For real-time | |
| 3455 // applications, Linux supports SCHED_RR which allows static priority (1-99). | |
| 3456 // However, for large multi-threaded applications, SCHED_RR is not only slower | |
| 3457 // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out | |
| 3458 // of 5 runs - Sep 2005). | |
| 3459 // | |
| 3460 // The following code actually changes the niceness of kernel-thread/LWP. It | |
| 3461 // has an assumption that setpriority() only modifies one kernel-thread/LWP, | |
| 3462 // not the entire user process, and user level threads are 1:1 mapped to kernel | |
| 3463 // threads. It has always been the case, but could change in the future. For | |
| 3464 // this reason, the code should not be used as default (ThreadPriorityPolicy=0). | |
| 3465 // It is only used when ThreadPriorityPolicy=1 and requires root privilege. | |
| 3466 | |
|
4854
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3467 int os::java_to_os_priority[CriticalPriority + 1] = { |
| 0 | 3468 19, // 0 Entry should never be used |
| 3469 | |
| 3470 4, // 1 MinPriority | |
| 3471 3, // 2 | |
| 3472 2, // 3 | |
| 3473 | |
| 3474 1, // 4 | |
| 3475 0, // 5 NormPriority | |
| 3476 -1, // 6 | |
| 3477 | |
| 3478 -2, // 7 | |
| 3479 -3, // 8 | |
| 3480 -4, // 9 NearMaxPriority | |
| 3481 | |
|
4854
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3482 -5, // 10 MaxPriority |
|
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3483 |
|
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3484 -5 // 11 CriticalPriority |
| 0 | 3485 }; |
| 3486 | |
| 3487 static int prio_init() { | |
| 3488 if (ThreadPriorityPolicy == 1) { | |
| 3489 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 | |
| 3490 // if effective uid is not root. Perhaps, a more elegant way of doing | |
| 3491 // this is to test CAP_SYS_NICE capability, but that will require libcap.so | |
| 3492 if (geteuid() != 0) { | |
| 3493 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { | |
| 3494 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); | |
| 3495 } | |
| 3496 ThreadPriorityPolicy = 0; | |
| 3497 } | |
| 3498 } | |
|
4854
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3499 if (UseCriticalJavaThreadPriority) { |
|
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3500 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
|
3501 } |
| 0 | 3502 return 0; |
| 3503 } | |
| 3504 | |
| 3505 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
| 3506 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; | |
| 3507 | |
| 3508 int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); | |
| 3509 return (ret == 0) ? OS_OK : OS_ERR; | |
| 3510 } | |
| 3511 | |
| 3512 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
| 3513 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { | |
| 3514 *priority_ptr = java_to_os_priority[NormPriority]; | |
| 3515 return OS_OK; | |
| 3516 } | |
| 3517 | |
| 3518 errno = 0; | |
| 3519 *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); | |
| 3520 return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); | |
| 3521 } | |
| 3522 | |
| 3523 // Hint to the underlying OS that a task switch would not be good. | |
| 3524 // Void return because it's a hint and can fail. | |
| 3525 void os::hint_no_preempt() {} | |
| 3526 | |
| 3527 //////////////////////////////////////////////////////////////////////////////// | |
| 3528 // suspend/resume support | |
| 3529 | |
| 3530 // the low-level signal-based suspend/resume support is a remnant from the | |
| 3531 // old VM-suspension that used to be for java-suspension, safepoints etc, | |
| 3532 // within hotspot. Now there is a single use-case for this: | |
| 3533 // - calling get_thread_pc() on the VMThread by the flat-profiler task | |
| 3534 // that runs in the watcher thread. | |
| 3535 // The remaining code is greatly simplified from the more general suspension | |
| 3536 // code that used to be used. | |
| 3537 // | |
| 3538 // The protocol is quite simple: | |
| 3539 // - suspend: | |
| 3540 // - sends a signal to the target thread | |
| 3541 // - polls the suspend state of the osthread using a yield loop | |
| 3542 // - target thread signal handler (SR_handler) sets suspend state | |
| 3543 // and blocks in sigsuspend until continued | |
| 3544 // - resume: | |
| 3545 // - sets target osthread state to continue | |
| 3546 // - sends signal to end the sigsuspend loop in the SR_handler | |
| 3547 // | |
| 3548 // Note that the SR_lock plays no role in this suspend/resume protocol. | |
| 3549 // | |
| 3550 | |
| 3551 static void resume_clear_context(OSThread *osthread) { | |
| 3552 osthread->set_ucontext(NULL); | |
| 3553 osthread->set_siginfo(NULL); | |
| 3554 | |
| 3555 // notify the suspend action is completed, we have now resumed | |
| 3556 osthread->sr.clear_suspended(); | |
| 3557 } | |
| 3558 | |
| 3559 static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { | |
| 3560 osthread->set_ucontext(context); | |
| 3561 osthread->set_siginfo(siginfo); | |
| 3562 } | |
| 3563 | |
| 3564 // | |
| 3565 // Handler function invoked when a thread's execution is suspended or | |
| 3566 // resumed. We have to be careful that only async-safe functions are | |
| 3567 // called here (Note: most pthread functions are not async safe and | |
| 3568 // should be avoided.) | |
| 3569 // | |
| 3570 // Note: sigwait() is a more natural fit than sigsuspend() from an | |
| 3571 // interface point of view, but sigwait() prevents the signal hander | |
| 3572 // from being run. libpthread would get very confused by not having | |
| 3573 // its signal handlers run and prevents sigwait()'s use with the | |
| 3574 // mutex granting granting signal. | |
| 3575 // | |
| 3576 // Currently only ever called on the VMThread | |
| 3577 // | |
| 3578 static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { | |
| 3579 // Save and restore errno to avoid confusing native code with EINTR | |
| 3580 // after sigsuspend. | |
| 3581 int old_errno = errno; | |
| 3582 | |
| 3583 Thread* thread = Thread::current(); | |
| 3584 OSThread* osthread = thread->osthread(); | |
| 3585 assert(thread->is_VM_thread(), "Must be VMThread"); | |
| 3586 // read current suspend action | |
| 3587 int action = osthread->sr.suspend_action(); | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3588 if (action == os::Linux::SuspendResume::SR_SUSPEND) { |
| 0 | 3589 suspend_save_context(osthread, siginfo, context); |
| 3590 | |
| 3591 // Notify the suspend action is about to be completed. do_suspend() | |
| 3592 // waits until SR_SUSPENDED is set and then returns. We will wait | |
| 3593 // here for a resume signal and that completes the suspend-other | |
| 3594 // action. do_suspend/do_resume is always called as a pair from | |
| 3595 // the same thread - so there are no races | |
| 3596 | |
| 3597 // notify the caller | |
| 3598 osthread->sr.set_suspended(); | |
| 3599 | |
| 3600 sigset_t suspend_set; // signals for sigsuspend() | |
| 3601 | |
| 3602 // get current set of blocked signals and unblock resume signal | |
| 3603 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); | |
| 3604 sigdelset(&suspend_set, SR_signum); | |
| 3605 | |
| 3606 // wait here until we are resumed | |
| 3607 do { | |
| 3608 sigsuspend(&suspend_set); | |
| 3609 // ignore all returns until we get a resume signal | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3610 } while (osthread->sr.suspend_action() != os::Linux::SuspendResume::SR_CONTINUE); |
| 0 | 3611 |
| 3612 resume_clear_context(osthread); | |
| 3613 | |
| 3614 } else { | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3615 assert(action == os::Linux::SuspendResume::SR_CONTINUE, "unexpected sr action"); |
| 0 | 3616 // nothing special to do - just leave the handler |
| 3617 } | |
| 3618 | |
| 3619 errno = old_errno; | |
| 3620 } | |
| 3621 | |
| 3622 | |
| 3623 static int SR_initialize() { | |
| 3624 struct sigaction act; | |
| 3625 char *s; | |
| 3626 /* Get signal number to use for suspend/resume */ | |
| 3627 if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { | |
| 3628 int sig = ::strtol(s, 0, 10); | |
| 3629 if (sig > 0 || sig < _NSIG) { | |
| 3630 SR_signum = sig; | |
| 3631 } | |
| 3632 } | |
| 3633 | |
| 3634 assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, | |
| 3635 "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); | |
| 3636 | |
| 3637 sigemptyset(&SR_sigset); | |
| 3638 sigaddset(&SR_sigset, SR_signum); | |
| 3639 | |
| 3640 /* Set up signal handler for suspend/resume */ | |
| 3641 act.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 3642 act.sa_handler = (void (*)(int)) SR_handler; | |
| 3643 | |
| 3644 // SR_signum is blocked by default. | |
| 3645 // 4528190 - We also need to block pthread restart signal (32 on all | |
| 3646 // supported Linux platforms). Note that LinuxThreads need to block | |
| 3647 // this signal for all threads to work properly. So we don't have | |
| 3648 // to use hard-coded signal number when setting up the mask. | |
| 3649 pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); | |
| 3650 | |
| 3651 if (sigaction(SR_signum, &act, 0) == -1) { | |
| 3652 return -1; | |
| 3653 } | |
| 3654 | |
| 3655 // Save signal flag | |
| 3656 os::Linux::set_our_sigflags(SR_signum, act.sa_flags); | |
| 3657 return 0; | |
| 3658 } | |
| 3659 | |
| 3660 | |
| 3661 // returns true on success and false on error - really an error is fatal | |
| 3662 // but this seems the normal response to library errors | |
| 3663 static bool do_suspend(OSThread* osthread) { | |
| 3664 // mark as suspended and send signal | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3665 osthread->sr.set_suspend_action(os::Linux::SuspendResume::SR_SUSPEND); |
| 0 | 3666 int status = pthread_kill(osthread->pthread_id(), SR_signum); |
| 3667 assert_status(status == 0, status, "pthread_kill"); | |
| 3668 | |
| 3669 // check status and wait until notified of suspension | |
| 3670 if (status == 0) { | |
| 3671 for (int i = 0; !osthread->sr.is_suspended(); i++) { | |
| 3672 os::yield_all(i); | |
| 3673 } | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3674 osthread->sr.set_suspend_action(os::Linux::SuspendResume::SR_NONE); |
| 0 | 3675 return true; |
| 3676 } | |
| 3677 else { | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3678 osthread->sr.set_suspend_action(os::Linux::SuspendResume::SR_NONE); |
| 0 | 3679 return false; |
| 3680 } | |
| 3681 } | |
| 3682 | |
| 3683 static void do_resume(OSThread* osthread) { | |
| 3684 assert(osthread->sr.is_suspended(), "thread should be suspended"); | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3685 osthread->sr.set_suspend_action(os::Linux::SuspendResume::SR_CONTINUE); |
| 0 | 3686 |
| 3687 int status = pthread_kill(osthread->pthread_id(), SR_signum); | |
| 3688 assert_status(status == 0, status, "pthread_kill"); | |
| 3689 // check status and wait unit notified of resumption | |
| 3690 if (status == 0) { | |
| 3691 for (int i = 0; osthread->sr.is_suspended(); i++) { | |
| 3692 os::yield_all(i); | |
| 3693 } | |
| 3694 } | |
|
8675
63e54c37ac64
8008959: Fix non-PCH build on Linux, Windows and MacOS X
simonis
parents:
8099
diff
changeset
|
3695 osthread->sr.set_suspend_action(os::Linux::SuspendResume::SR_NONE); |
| 0 | 3696 } |
| 3697 | |
| 3698 //////////////////////////////////////////////////////////////////////////////// | |
| 3699 // interrupt support | |
| 3700 | |
| 3701 void os::interrupt(Thread* thread) { | |
| 3702 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 3703 "possibility of dangling Thread pointer"); | |
| 3704 | |
| 3705 OSThread* osthread = thread->osthread(); | |
| 3706 | |
| 3707 if (!osthread->interrupted()) { | |
| 3708 osthread->set_interrupted(true); | |
| 3709 // More than one thread can get here with the same value of osthread, | |
| 3710 // resulting in multiple notifications. We do, however, want the store | |
| 3711 // to interrupted() to be visible to other threads before we execute unpark(). | |
| 3712 OrderAccess::fence(); | |
| 3713 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3714 if (slp != NULL) slp->unpark() ; | |
| 3715 } | |
| 3716 | |
| 3717 // For JSR166. Unpark even if interrupt status already was set | |
| 3718 if (thread->is_Java_thread()) | |
| 3719 ((JavaThread*)thread)->parker()->unpark(); | |
| 3720 | |
| 3721 ParkEvent * ev = thread->_ParkEvent ; | |
| 3722 if (ev != NULL) ev->unpark() ; | |
| 3723 | |
| 3724 } | |
| 3725 | |
| 3726 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 3727 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 3728 "possibility of dangling Thread pointer"); | |
| 3729 | |
| 3730 OSThread* osthread = thread->osthread(); | |
| 3731 | |
| 3732 bool interrupted = osthread->interrupted(); | |
| 3733 | |
| 3734 if (interrupted && clear_interrupted) { | |
| 3735 osthread->set_interrupted(false); | |
| 3736 // consider thread->_SleepEvent->reset() ... optional optimization | |
| 3737 } | |
| 3738 | |
| 3739 return interrupted; | |
| 3740 } | |
| 3741 | |
| 3742 /////////////////////////////////////////////////////////////////////////////////// | |
| 3743 // signal handling (except suspend/resume) | |
| 3744 | |
| 3745 // This routine may be used by user applications as a "hook" to catch signals. | |
| 3746 // The user-defined signal handler must pass unrecognized signals to this | |
| 3747 // routine, and if it returns true (non-zero), then the signal handler must | |
| 3748 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
| 3749 // routine will never retun false (zero), but instead will execute a VM panic | |
| 3750 // routine kill the process. | |
| 3751 // | |
| 3752 // If this routine returns false, it is OK to call it again. This allows | |
| 3753 // the user-defined signal handler to perform checks either before or after | |
| 3754 // the VM performs its own checks. Naturally, the user code would be making | |
| 3755 // a serious error if it tried to handle an exception (such as a null check | |
| 3756 // or breakpoint) that the VM was generating for its own correct operation. | |
| 3757 // | |
| 3758 // This routine may recognize any of the following kinds of signals: | |
| 3759 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. | |
| 3760 // It should be consulted by handlers for any of those signals. | |
| 3761 // | |
| 3762 // The caller of this routine must pass in the three arguments supplied | |
| 3763 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
| 3764 // field of the structure passed to sigaction(). This routine assumes that | |
| 3765 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
| 3766 // | |
| 3767 // Note that the VM will print warnings if it detects conflicting signal | |
| 3768 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
| 3769 // | |
| 2191 | 3770 extern "C" JNIEXPORT int |
| 0 | 3771 JVM_handle_linux_signal(int signo, siginfo_t* siginfo, |
| 3772 void* ucontext, int abort_if_unrecognized); | |
| 3773 | |
| 3774 void signalHandler(int sig, siginfo_t* info, void* uc) { | |
| 3775 assert(info != NULL && uc != NULL, "it must be old kernel"); | |
| 8067 | 3776 int orig_errno = errno; // Preserve errno value over signal handler. |
| 0 | 3777 JVM_handle_linux_signal(sig, info, uc, true); |
| 8067 | 3778 errno = orig_errno; |
| 0 | 3779 } |
| 3780 | |
| 3781 | |
| 3782 // This boolean allows users to forward their own non-matching signals | |
| 3783 // to JVM_handle_linux_signal, harmlessly. | |
| 3784 bool os::Linux::signal_handlers_are_installed = false; | |
| 3785 | |
| 3786 // For signal-chaining | |
| 3787 struct sigaction os::Linux::sigact[MAXSIGNUM]; | |
| 3788 unsigned int os::Linux::sigs = 0; | |
| 3789 bool os::Linux::libjsig_is_loaded = false; | |
| 3790 typedef struct sigaction *(*get_signal_t)(int); | |
| 3791 get_signal_t os::Linux::get_signal_action = NULL; | |
| 3792 | |
| 3793 struct sigaction* os::Linux::get_chained_signal_action(int sig) { | |
| 3794 struct sigaction *actp = NULL; | |
| 3795 | |
| 3796 if (libjsig_is_loaded) { | |
| 3797 // Retrieve the old signal handler from libjsig | |
| 3798 actp = (*get_signal_action)(sig); | |
| 3799 } | |
| 3800 if (actp == NULL) { | |
| 3801 // Retrieve the preinstalled signal handler from jvm | |
| 3802 actp = get_preinstalled_handler(sig); | |
| 3803 } | |
| 3804 | |
| 3805 return actp; | |
| 3806 } | |
| 3807 | |
| 3808 static bool call_chained_handler(struct sigaction *actp, int sig, | |
| 3809 siginfo_t *siginfo, void *context) { | |
| 3810 // Call the old signal handler | |
| 3811 if (actp->sa_handler == SIG_DFL) { | |
| 3812 // It's more reasonable to let jvm treat it as an unexpected exception | |
| 3813 // instead of taking the default action. | |
| 3814 return false; | |
| 3815 } else if (actp->sa_handler != SIG_IGN) { | |
| 3816 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
| 3817 // automaticlly block the signal | |
| 3818 sigaddset(&(actp->sa_mask), sig); | |
| 3819 } | |
| 3820 | |
| 3821 sa_handler_t hand; | |
| 3822 sa_sigaction_t sa; | |
| 3823 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
| 3824 // retrieve the chained handler | |
| 3825 if (siginfo_flag_set) { | |
| 3826 sa = actp->sa_sigaction; | |
| 3827 } else { | |
| 3828 hand = actp->sa_handler; | |
| 3829 } | |
| 3830 | |
| 3831 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
| 3832 actp->sa_handler = SIG_DFL; | |
| 3833 } | |
| 3834 | |
| 3835 // try to honor the signal mask | |
| 3836 sigset_t oset; | |
| 3837 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
| 3838 | |
| 3839 // call into the chained handler | |
| 3840 if (siginfo_flag_set) { | |
| 3841 (*sa)(sig, siginfo, context); | |
| 3842 } else { | |
| 3843 (*hand)(sig); | |
| 3844 } | |
| 3845 | |
| 3846 // restore the signal mask | |
| 3847 pthread_sigmask(SIG_SETMASK, &oset, 0); | |
| 3848 } | |
| 3849 // Tell jvm's signal handler the signal is taken care of. | |
| 3850 return true; | |
| 3851 } | |
| 3852 | |
| 3853 bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
| 3854 bool chained = false; | |
| 3855 // signal-chaining | |
| 3856 if (UseSignalChaining) { | |
| 3857 struct sigaction *actp = get_chained_signal_action(sig); | |
| 3858 if (actp != NULL) { | |
| 3859 chained = call_chained_handler(actp, sig, siginfo, context); | |
| 3860 } | |
| 3861 } | |
| 3862 return chained; | |
| 3863 } | |
| 3864 | |
| 3865 struct sigaction* os::Linux::get_preinstalled_handler(int sig) { | |
| 3866 if ((( (unsigned int)1 << sig ) & sigs) != 0) { | |
| 3867 return &sigact[sig]; | |
| 3868 } | |
| 3869 return NULL; | |
| 3870 } | |
| 3871 | |
| 3872 void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
| 3873 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 3874 sigact[sig] = oldAct; | |
| 3875 sigs |= (unsigned int)1 << sig; | |
| 3876 } | |
| 3877 | |
| 3878 // for diagnostic | |
| 3879 int os::Linux::sigflags[MAXSIGNUM]; | |
| 3880 | |
| 3881 int os::Linux::get_our_sigflags(int sig) { | |
| 3882 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 3883 return sigflags[sig]; | |
| 3884 } | |
| 3885 | |
| 3886 void os::Linux::set_our_sigflags(int sig, int flags) { | |
| 3887 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 3888 sigflags[sig] = flags; | |
| 3889 } | |
| 3890 | |
| 3891 void os::Linux::set_signal_handler(int sig, bool set_installed) { | |
| 3892 // Check for overwrite. | |
| 3893 struct sigaction oldAct; | |
| 3894 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
| 3895 | |
| 3896 void* oldhand = oldAct.sa_sigaction | |
| 3897 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 3898 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 3899 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
| 3900 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
| 3901 oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { | |
| 3902 if (AllowUserSignalHandlers || !set_installed) { | |
| 3903 // Do not overwrite; user takes responsibility to forward to us. | |
| 3904 return; | |
| 3905 } else if (UseSignalChaining) { | |
| 3906 // save the old handler in jvm | |
| 3907 save_preinstalled_handler(sig, oldAct); | |
| 3908 // libjsig also interposes the sigaction() call below and saves the | |
| 3909 // old sigaction on it own. | |
| 3910 } else { | |
|
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
3911 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
|
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
3912 "%#lx for signal %d.", (long)oldhand, sig)); |
| 0 | 3913 } |
| 3914 } | |
| 3915 | |
| 3916 struct sigaction sigAct; | |
| 3917 sigfillset(&(sigAct.sa_mask)); | |
| 3918 sigAct.sa_handler = SIG_DFL; | |
| 3919 if (!set_installed) { | |
| 3920 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 3921 } else { | |
| 3922 sigAct.sa_sigaction = signalHandler; | |
| 3923 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 3924 } | |
| 3925 // Save flags, which are set by ours | |
| 3926 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 3927 sigflags[sig] = sigAct.sa_flags; | |
| 3928 | |
| 3929 int ret = sigaction(sig, &sigAct, &oldAct); | |
| 3930 assert(ret == 0, "check"); | |
| 3931 | |
| 3932 void* oldhand2 = oldAct.sa_sigaction | |
| 3933 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 3934 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 3935 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
| 3936 } | |
| 3937 | |
| 3938 // install signal handlers for signals that HotSpot needs to | |
| 3939 // handle in order to support Java-level exception handling. | |
| 3940 | |
| 3941 void os::Linux::install_signal_handlers() { | |
| 3942 if (!signal_handlers_are_installed) { | |
| 3943 signal_handlers_are_installed = true; | |
| 3944 | |
| 3945 // signal-chaining | |
| 3946 typedef void (*signal_setting_t)(); | |
| 3947 signal_setting_t begin_signal_setting = NULL; | |
| 3948 signal_setting_t end_signal_setting = NULL; | |
| 3949 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 3950 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
| 3951 if (begin_signal_setting != NULL) { | |
| 3952 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 3953 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
| 3954 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
| 3955 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
| 3956 libjsig_is_loaded = true; | |
| 3957 assert(UseSignalChaining, "should enable signal-chaining"); | |
| 3958 } | |
| 3959 if (libjsig_is_loaded) { | |
| 3960 // Tell libjsig jvm is setting signal handlers | |
| 3961 (*begin_signal_setting)(); | |
| 3962 } | |
| 3963 | |
| 3964 set_signal_handler(SIGSEGV, true); | |
| 3965 set_signal_handler(SIGPIPE, true); | |
| 3966 set_signal_handler(SIGBUS, true); | |
| 3967 set_signal_handler(SIGILL, true); | |
| 3968 set_signal_handler(SIGFPE, true); | |
| 3969 set_signal_handler(SIGXFSZ, true); | |
| 3970 | |
| 3971 if (libjsig_is_loaded) { | |
| 3972 // Tell libjsig jvm finishes setting signal handlers | |
| 3973 (*end_signal_setting)(); | |
| 3974 } | |
| 3975 | |
| 3976 // 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
|
3977 // 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
|
3978 // Log that signal checking is off only if -verbose:jni is specified. |
| 0 | 3979 if (CheckJNICalls) { |
| 3980 if (libjsig_is_loaded) { | |
|
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
3981 if (PrintJNIResolving) { |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
3982 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
|
3983 } |
| 0 | 3984 check_signals = false; |
| 3985 } | |
| 3986 if (AllowUserSignalHandlers) { | |
|
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
3987 if (PrintJNIResolving) { |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
3988 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
|
3989 } |
| 0 | 3990 check_signals = false; |
| 3991 } | |
| 3992 } | |
| 3993 } | |
| 3994 } | |
| 3995 | |
| 3996 // This is the fastest way to get thread cpu time on Linux. | |
| 3997 // Returns cpu time (user+sys) for any thread, not only for current. | |
| 3998 // POSIX compliant clocks are implemented in the kernels 2.6.16+. | |
| 3999 // It might work on 2.6.10+ with a special kernel/glibc patch. | |
| 4000 // For reference, please, see IEEE Std 1003.1-2004: | |
| 4001 // http://www.unix.org/single_unix_specification | |
| 4002 | |
| 4003 jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) { | |
| 4004 struct timespec tp; | |
| 4005 int rc = os::Linux::clock_gettime(clockid, &tp); | |
| 4006 assert(rc == 0, "clock_gettime is expected to return 0 code"); | |
| 4007 | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
4008 return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec; |
| 0 | 4009 } |
| 4010 | |
| 4011 ///// | |
| 4012 // glibc on Linux platform uses non-documented flag | |
| 4013 // to indicate, that some special sort of signal | |
| 4014 // trampoline is used. | |
| 4015 // We will never set this flag, and we should | |
| 4016 // ignore this flag in our diagnostic | |
| 4017 #ifdef SIGNIFICANT_SIGNAL_MASK | |
| 4018 #undef SIGNIFICANT_SIGNAL_MASK | |
| 4019 #endif | |
| 4020 #define SIGNIFICANT_SIGNAL_MASK (~0x04000000) | |
| 4021 | |
| 4022 static const char* get_signal_handler_name(address handler, | |
| 4023 char* buf, int buflen) { | |
| 4024 int offset; | |
| 4025 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
| 4026 if (found) { | |
| 4027 // skip directory names | |
| 4028 const char *p1, *p2; | |
| 4029 p1 = buf; | |
| 4030 size_t len = strlen(os::file_separator()); | |
| 4031 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 4032 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
| 4033 } else { | |
| 4034 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
| 4035 } | |
| 4036 return buf; | |
| 4037 } | |
| 4038 | |
| 4039 static void print_signal_handler(outputStream* st, int sig, | |
| 4040 char* buf, size_t buflen) { | |
| 4041 struct sigaction sa; | |
| 4042 | |
| 4043 sigaction(sig, NULL, &sa); | |
| 4044 | |
| 4045 // See comment for SIGNIFICANT_SIGNAL_MASK define | |
| 4046 sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4047 | |
| 4048 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
| 4049 | |
| 4050 address handler = (sa.sa_flags & SA_SIGINFO) | |
| 4051 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
| 4052 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
| 4053 | |
| 4054 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
| 4055 st->print("SIG_DFL"); | |
| 4056 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
| 4057 st->print("SIG_IGN"); | |
| 4058 } else { | |
| 4059 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
| 4060 } | |
| 4061 | |
| 4062 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); | |
| 4063 | |
| 4064 address rh = VMError::get_resetted_sighandler(sig); | |
| 4065 // May be, handler was resetted by VMError? | |
| 4066 if(rh != NULL) { | |
| 4067 handler = rh; | |
| 4068 sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; | |
| 4069 } | |
| 4070 | |
| 4071 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); | |
| 4072 | |
| 4073 // Check: is it our handler? | |
| 4074 if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || | |
| 4075 handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { | |
| 4076 // It is our signal handler | |
| 4077 // check for flags, reset system-used one! | |
| 4078 if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
| 4079 st->print( | |
| 4080 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
| 4081 os::Linux::get_our_sigflags(sig)); | |
| 4082 } | |
| 4083 } | |
| 4084 st->cr(); | |
| 4085 } | |
| 4086 | |
| 4087 | |
| 4088 #define DO_SIGNAL_CHECK(sig) \ | |
| 4089 if (!sigismember(&check_signal_done, sig)) \ | |
| 4090 os::Linux::check_signal_handler(sig) | |
| 4091 | |
| 4092 // This method is a periodic task to check for misbehaving JNI applications | |
| 4093 // under CheckJNI, we can add any periodic checks here | |
| 4094 | |
| 4095 void os::run_periodic_checks() { | |
| 4096 | |
| 4097 if (check_signals == false) return; | |
| 4098 | |
| 4099 // SEGV and BUS if overridden could potentially prevent | |
| 4100 // generation of hs*.log in the event of a crash, debugging | |
| 4101 // such a case can be very challenging, so we absolutely | |
| 4102 // check the following for a good measure: | |
| 4103 DO_SIGNAL_CHECK(SIGSEGV); | |
| 4104 DO_SIGNAL_CHECK(SIGILL); | |
| 4105 DO_SIGNAL_CHECK(SIGFPE); | |
| 4106 DO_SIGNAL_CHECK(SIGBUS); | |
| 4107 DO_SIGNAL_CHECK(SIGPIPE); | |
| 4108 DO_SIGNAL_CHECK(SIGXFSZ); | |
| 4109 | |
| 4110 | |
| 4111 // ReduceSignalUsage allows the user to override these handlers | |
| 4112 // see comments at the very top and jvm_solaris.h | |
| 4113 if (!ReduceSignalUsage) { | |
| 4114 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
| 4115 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
| 4116 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
| 4117 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
| 4118 } | |
| 4119 | |
| 4120 DO_SIGNAL_CHECK(SR_signum); | |
| 4121 DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); | |
| 4122 } | |
| 4123 | |
| 4124 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
| 4125 | |
| 4126 static os_sigaction_t os_sigaction = NULL; | |
| 4127 | |
| 4128 void os::Linux::check_signal_handler(int sig) { | |
| 4129 char buf[O_BUFLEN]; | |
| 4130 address jvmHandler = NULL; | |
| 4131 | |
| 4132 | |
| 4133 struct sigaction act; | |
| 4134 if (os_sigaction == NULL) { | |
| 4135 // only trust the default sigaction, in case it has been interposed | |
| 4136 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
| 4137 if (os_sigaction == NULL) return; | |
| 4138 } | |
| 4139 | |
| 4140 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
| 4141 | |
| 4142 | |
| 4143 act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4144 | |
| 4145 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
| 4146 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
| 4147 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
| 4148 | |
| 4149 | |
| 4150 switch(sig) { | |
| 4151 case SIGSEGV: | |
| 4152 case SIGBUS: | |
| 4153 case SIGFPE: | |
| 4154 case SIGPIPE: | |
| 4155 case SIGILL: | |
| 4156 case SIGXFSZ: | |
| 4157 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); | |
| 4158 break; | |
| 4159 | |
| 4160 case SHUTDOWN1_SIGNAL: | |
| 4161 case SHUTDOWN2_SIGNAL: | |
| 4162 case SHUTDOWN3_SIGNAL: | |
| 4163 case BREAK_SIGNAL: | |
| 4164 jvmHandler = (address)user_handler(); | |
| 4165 break; | |
| 4166 | |
| 4167 case INTERRUPT_SIGNAL: | |
| 4168 jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); | |
| 4169 break; | |
| 4170 | |
| 4171 default: | |
| 4172 if (sig == SR_signum) { | |
| 4173 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); | |
| 4174 } else { | |
| 4175 return; | |
| 4176 } | |
| 4177 break; | |
| 4178 } | |
| 4179 | |
| 4180 if (thisHandler != jvmHandler) { | |
| 4181 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
| 4182 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
| 4183 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
| 4184 // No need to check this sig any longer | |
| 4185 sigaddset(&check_signal_done, sig); | |
| 4186 } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
| 4187 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
| 4188 tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig)); | |
| 4189 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
| 4190 // No need to check this sig any longer | |
| 4191 sigaddset(&check_signal_done, sig); | |
| 4192 } | |
| 4193 | |
| 4194 // Dump all the signal | |
| 4195 if (sigismember(&check_signal_done, sig)) { | |
| 4196 print_signal_handlers(tty, buf, O_BUFLEN); | |
| 4197 } | |
| 4198 } | |
| 4199 | |
| 4200 extern void report_error(char* file_name, int line_no, char* title, char* format, ...); | |
| 4201 | |
| 4202 extern bool signal_name(int signo, char* buf, size_t len); | |
| 4203 | |
| 4204 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
| 4205 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
| 4206 // signal | |
| 4207 if (!signal_name(exception_code, buf, size)) { | |
| 4208 jio_snprintf(buf, size, "SIG%d", exception_code); | |
| 4209 } | |
| 4210 return buf; | |
| 4211 } else { | |
| 4212 return NULL; | |
| 4213 } | |
| 4214 } | |
| 4215 | |
| 4216 // this is called _before_ the most of global arguments have been parsed | |
| 4217 void os::init(void) { | |
| 4218 char dummy; /* used to get a guess on initial stack address */ | |
| 4219 // first_hrtime = gethrtime(); | |
| 4220 | |
| 4221 // With LinuxThreads the JavaMain thread pid (primordial thread) | |
| 4222 // is different than the pid of the java launcher thread. | |
| 4223 // So, on Linux, the launcher thread pid is passed to the VM | |
| 4224 // via the sun.java.launcher.pid property. | |
| 4225 // Use this property instead of getpid() if it was correctly passed. | |
| 4226 // See bug 6351349. | |
| 4227 pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); | |
| 4228 | |
| 4229 _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); | |
| 4230 | |
| 4231 clock_tics_per_sec = sysconf(_SC_CLK_TCK); | |
| 4232 | |
| 4233 init_random(1234567); | |
| 4234 | |
| 4235 ThreadCritical::initialize(); | |
| 4236 | |
| 4237 Linux::set_page_size(sysconf(_SC_PAGESIZE)); | |
| 4238 if (Linux::page_size() == -1) { | |
|
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4239 fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)", |
|
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4240 strerror(errno))); |
| 0 | 4241 } |
| 4242 init_page_sizes((size_t) Linux::page_size()); | |
| 4243 | |
| 4244 Linux::initialize_system_info(); | |
| 4245 | |
| 4246 // main_thread points to the aboriginal thread | |
| 4247 Linux::_main_thread = pthread_self(); | |
| 4248 | |
| 4249 Linux::clock_init(); | |
| 4250 initial_time_count = os::elapsed_counter(); | |
| 242 | 4251 pthread_mutex_init(&dl_mutex, NULL); |
| 0 | 4252 } |
| 4253 | |
| 4254 // To install functions for atexit system call | |
| 4255 extern "C" { | |
| 4256 static void perfMemory_exit_helper() { | |
| 4257 perfMemory_exit(); | |
| 4258 } | |
| 4259 } | |
| 4260 | |
| 4261 // this is called _after_ the global arguments have been parsed | |
| 4262 jint os::init_2(void) | |
| 4263 { | |
| 4264 Linux::fast_thread_clock_init(); | |
| 4265 | |
| 4266 // Allocate a single page and mark it as readable for safepoint polling | |
| 4267 address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
| 4268 guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); | |
| 4269 | |
| 4270 os::set_polling_page( polling_page ); | |
| 4271 | |
| 4272 #ifndef PRODUCT | |
| 4273 if(Verbose && PrintMiscellaneous) | |
| 4274 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 4275 #endif | |
| 4276 | |
| 4277 if (!UseMembar) { | |
| 4278 address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
| 4279 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); | |
| 4280 os::set_memory_serialize_page( mem_serialize_page ); | |
| 4281 | |
| 4282 #ifndef PRODUCT | |
| 4283 if(Verbose && PrintMiscellaneous) | |
| 4284 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 4285 #endif | |
| 4286 } | |
| 4287 | |
|
3318
188c9a5d6a6d
7040485: Use transparent huge page on linux by default
iveresov
parents:
3292
diff
changeset
|
4288 os::large_page_init(); |
| 0 | 4289 |
| 4290 // initialize suspend/resume support - must do this before signal_sets_init() | |
| 4291 if (SR_initialize() != 0) { | |
| 4292 perror("SR_initialize failed"); | |
| 4293 return JNI_ERR; | |
| 4294 } | |
| 4295 | |
| 4296 Linux::signal_sets_init(); | |
| 4297 Linux::install_signal_handlers(); | |
| 4298 | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4299 // 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
|
4300 // the java system classes, including StackOverflowError - depends on page |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4301 // 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
|
4302 // 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
|
4303 // class initialization depending on 32 or 64 bit VM. |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4304 os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed, |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4305 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4306 2*BytesPerWord COMPILER2_PRESENT(+1)) * Linux::page_size()); |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4307 |
| 0 | 4308 size_t threadStackSizeInBytes = ThreadStackSize * K; |
| 4309 if (threadStackSizeInBytes != 0 && | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4310 threadStackSizeInBytes < os::Linux::min_stack_allowed) { |
| 0 | 4311 tty->print_cr("\nThe stack size specified is too small, " |
| 4312 "Specify at least %dk", | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4313 os::Linux::min_stack_allowed/ K); |
| 0 | 4314 return JNI_ERR; |
| 4315 } | |
| 4316 | |
| 4317 // Make the stack size a multiple of the page size so that | |
| 4318 // the yellow/red zones can be guarded. | |
| 4319 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
| 4320 vm_page_size())); | |
| 4321 | |
| 4322 Linux::capture_initial_stack(JavaThread::stack_size_at_create()); | |
| 4323 | |
| 4324 Linux::libpthread_init(); | |
| 4325 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 4326 tty->print_cr("[HotSpot is running with %s, %s(%s)]\n", | |
| 4327 Linux::glibc_version(), Linux::libpthread_version(), | |
| 4328 Linux::is_floating_stack() ? "floating stack" : "fixed stack"); | |
| 4329 } | |
| 4330 | |
| 141 | 4331 if (UseNUMA) { |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4332 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
|
4333 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4334 } else { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4335 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
|
4336 // 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
|
4337 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4338 } |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4339 } |
|
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4340 // With SHM large pages we cannot uncommit a page, so there's not way |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4341 // we can make the adaptive lgrp chunk resizing work. If the user specified |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4342 // both UseNUMA and UseLargePages (or UseSHM) on the command line - warn and |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4343 // disable adaptive resizing. |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4344 if (UseNUMA && UseLargePages && UseSHM) { |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4345 if (!FLAG_IS_DEFAULT(UseNUMA)) { |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4346 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseSHM)) { |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4347 UseLargePages = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4348 } else { |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4349 warning("UseNUMA is not fully compatible with SHM large pages, disabling adaptive resizing"); |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4350 UseAdaptiveSizePolicy = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4351 UseAdaptiveNUMAChunkSizing = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4352 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4353 } else { |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4354 UseNUMA = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4355 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4356 } |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4357 if (!UseNUMA && ForceNUMA) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4358 UseNUMA = true; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4359 } |
| 141 | 4360 } |
| 4361 | |
| 0 | 4362 if (MaxFDLimit) { |
| 4363 // set the number of file descriptors to max. print out error | |
| 4364 // if getrlimit/setrlimit fails but continue regardless. | |
| 4365 struct rlimit nbr_files; | |
| 4366 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4367 if (status != 0) { | |
| 4368 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4369 perror("os::init_2 getrlimit failed"); | |
| 4370 } else { | |
| 4371 nbr_files.rlim_cur = nbr_files.rlim_max; | |
| 4372 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4373 if (status != 0) { | |
| 4374 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4375 perror("os::init_2 setrlimit failed"); | |
| 4376 } | |
| 4377 } | |
| 4378 } | |
| 4379 | |
| 4380 // Initialize lock used to serialize thread creation (see os::create_thread) | |
| 4381 Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false)); | |
| 4382 | |
| 4383 // at-exit methods are called in the reverse order of their registration. | |
| 4384 // atexit functions are called on return from main or as a result of a | |
| 4385 // call to exit(3C). There can be only 32 of these functions registered | |
| 4386 // and atexit() does not set errno. | |
| 4387 | |
| 4388 if (PerfAllowAtExitRegistration) { | |
| 4389 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 4390 // atexit functions can be delayed until process exit time, which | |
| 4391 // can be problematic for embedded VM situations. Embedded VMs should | |
| 4392 // call DestroyJavaVM() to assure that VM resources are released. | |
| 4393 | |
| 4394 // note: perfMemory_exit_helper atexit function may be removed in | |
| 4395 // the future if the appropriate cleanup code can be added to the | |
| 4396 // VM_Exit VMOperation's doit method. | |
| 4397 if (atexit(perfMemory_exit_helper) != 0) { | |
| 4398 warning("os::init2 atexit(perfMemory_exit_helper) failed"); | |
| 4399 } | |
| 4400 } | |
| 4401 | |
| 4402 // initialize thread priority policy | |
| 4403 prio_init(); | |
| 4404 | |
| 4405 return JNI_OK; | |
| 4406 } | |
| 4407 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4408 // this is called at the end of vm_initialization |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4409 void os::init_3(void) |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4410 { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4411 #ifdef JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4412 // Start the MemNotifyThread |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4413 if (LowMemoryProtection) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4414 MemNotifyThread::start(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4415 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4416 return; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4417 #endif |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4418 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4419 |
| 0 | 4420 // Mark the polling page as unreadable |
| 4421 void os::make_polling_page_unreadable(void) { | |
| 4422 if( !guard_memory((char*)_polling_page, Linux::page_size()) ) | |
| 4423 fatal("Could not disable polling page"); | |
| 4424 }; | |
| 4425 | |
| 4426 // Mark the polling page as readable | |
| 4427 void os::make_polling_page_readable(void) { | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
4428 if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) { |
| 0 | 4429 fatal("Could not enable polling page"); |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
4430 } |
| 0 | 4431 }; |
| 4432 | |
| 4433 int os::active_processor_count() { | |
| 4434 // Linux doesn't yet have a (official) notion of processor sets, | |
| 4435 // so just return the number of online processors. | |
| 4436 int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); | |
| 4437 assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); | |
| 4438 return online_cpus; | |
| 4439 } | |
| 4440 | |
| 4006 | 4441 void os::set_native_thread_name(const char *name) { |
| 4442 // Not yet implemented. | |
| 4443 return; | |
| 4444 } | |
| 4445 | |
| 0 | 4446 bool os::distribute_processes(uint length, uint* distribution) { |
| 4447 // Not yet implemented. | |
| 4448 return false; | |
| 4449 } | |
| 4450 | |
| 4451 bool os::bind_to_processor(uint processor_id) { | |
| 4452 // Not yet implemented. | |
| 4453 return false; | |
| 4454 } | |
| 4455 | |
| 4456 /// | |
| 4457 | |
| 4458 // Suspends the target using the signal mechanism and then grabs the PC before | |
| 4459 // resuming the target. Used by the flat-profiler only | |
| 4460 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 4461 // Make sure that it is called by the watcher for the VMThread | |
| 4462 assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); | |
| 4463 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
| 4464 | |
| 4465 ExtendedPC epc; | |
| 4466 | |
| 4467 OSThread* osthread = thread->osthread(); | |
| 4468 if (do_suspend(osthread)) { | |
| 4469 if (osthread->ucontext() != NULL) { | |
| 4470 epc = os::Linux::ucontext_get_pc(osthread->ucontext()); | |
| 4471 } else { | |
| 4472 // NULL context is unexpected, double-check this is the VMThread | |
| 4473 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); | |
| 4474 } | |
| 4475 do_resume(osthread); | |
| 4476 } | |
| 4477 // failure means pthread_kill failed for some reason - arguably this is | |
| 4478 // a fatal problem, but such problems are ignored elsewhere | |
| 4479 | |
| 4480 return epc; | |
| 4481 } | |
| 4482 | |
| 4483 int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) | |
| 4484 { | |
| 4485 if (is_NPTL()) { | |
| 4486 return pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 4487 } else { | |
| 4488 // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control | |
| 4489 // word back to default 64bit precision if condvar is signaled. Java | |
| 4490 // wants 53bit precision. Save and restore current value. | |
| 4491 int fpu = get_fpu_control_word(); | |
| 4492 int status = pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 4493 set_fpu_control_word(fpu); | |
| 4494 return status; | |
| 4495 } | |
| 4496 } | |
| 4497 | |
| 4498 //////////////////////////////////////////////////////////////////////////////// | |
| 4499 // debug support | |
| 4500 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4501 bool os::find(address addr, outputStream* st) { |
| 0 | 4502 Dl_info dlinfo; |
| 4503 memset(&dlinfo, 0, sizeof(dlinfo)); | |
| 4504 if (dladdr(addr, &dlinfo)) { | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4505 st->print(PTR_FORMAT ": ", addr); |
| 0 | 4506 if (dlinfo.dli_sname != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4507 st->print("%s+%#x", dlinfo.dli_sname, |
| 0 | 4508 addr - (intptr_t)dlinfo.dli_saddr); |
| 4509 } else if (dlinfo.dli_fname) { | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4510 st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
| 0 | 4511 } else { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4512 st->print("<absolute address>"); |
| 0 | 4513 } |
| 4514 if (dlinfo.dli_fname) { | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4515 st->print(" in %s", dlinfo.dli_fname); |
| 0 | 4516 } |
| 4517 if (dlinfo.dli_fbase) { | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4518 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
| 0 | 4519 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4520 st->cr(); |
| 0 | 4521 |
| 4522 if (Verbose) { | |
| 4523 // decode some bytes around the PC | |
|
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
4524 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
|
4525 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
| 0 | 4526 address lowest = (address) dlinfo.dli_sname; |
| 4527 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
| 4528 if (begin < lowest) begin = lowest; | |
| 4529 Dl_info dlinfo2; | |
| 4530 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr | |
| 4531 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) | |
| 4532 end = (address) dlinfo2.dli_saddr; | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4533 Disassembler::decode(begin, end, st); |
| 0 | 4534 } |
| 4535 return true; | |
| 4536 } | |
| 4537 return false; | |
| 4538 } | |
| 4539 | |
| 4540 //////////////////////////////////////////////////////////////////////////////// | |
| 4541 // misc | |
| 4542 | |
| 4543 // This does not do anything on Linux. This is basically a hook for being | |
| 4544 // able to use structured exception handling (thread-local exception filters) | |
| 4545 // on, e.g., Win32. | |
| 4546 void | |
| 4547 os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, | |
| 4548 JavaCallArguments* args, Thread* thread) { | |
| 4549 f(value, method, args, thread); | |
| 4550 } | |
| 4551 | |
| 4552 void os::print_statistics() { | |
| 4553 } | |
| 4554 | |
| 4555 int os::message_box(const char* title, const char* message) { | |
| 4556 int i; | |
| 4557 fdStream err(defaultStream::error_fd()); | |
| 4558 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 4559 err.cr(); | |
| 4560 err.print_raw_cr(title); | |
| 4561 for (i = 0; i < 78; i++) err.print_raw("-"); | |
| 4562 err.cr(); | |
| 4563 err.print_raw_cr(message); | |
| 4564 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 4565 err.cr(); | |
| 4566 | |
| 4567 char buf[16]; | |
| 4568 // Prevent process from exiting upon "read error" without consuming all CPU | |
| 4569 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
| 4570 | |
| 4571 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 4572 } | |
| 4573 | |
| 4574 int os::stat(const char *path, struct stat *sbuf) { | |
| 4575 char pathbuf[MAX_PATH]; | |
| 4576 if (strlen(path) > MAX_PATH - 1) { | |
| 4577 errno = ENAMETOOLONG; | |
| 4578 return -1; | |
| 4579 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4580 os::native_path(strcpy(pathbuf, path)); |
| 0 | 4581 return ::stat(pathbuf, sbuf); |
| 4582 } | |
| 4583 | |
| 4584 bool os::check_heap(bool force) { | |
| 4585 return true; | |
| 4586 } | |
| 4587 | |
| 4588 int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { | |
| 4589 return ::vsnprintf(buf, count, format, args); | |
| 4590 } | |
| 4591 | |
| 4592 // Is a (classpath) directory empty? | |
| 4593 bool os::dir_is_empty(const char* path) { | |
| 4594 DIR *dir = NULL; | |
| 4595 struct dirent *ptr; | |
| 4596 | |
| 4597 dir = opendir(path); | |
| 4598 if (dir == NULL) return true; | |
| 4599 | |
| 4600 /* Scan the directory */ | |
| 4601 bool result = true; | |
| 4602 char buf[sizeof(struct dirent) + MAX_PATH]; | |
| 4603 while (result && (ptr = ::readdir(dir)) != NULL) { | |
| 4604 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
| 4605 result = false; | |
| 4606 } | |
| 4607 } | |
| 4608 closedir(dir); | |
| 4609 return result; | |
| 4610 } | |
| 4611 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4612 // 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
|
4613 // from src/solaris/hpi/src/system_md.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4614 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4615 #ifndef O_DELETE |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4616 #define O_DELETE 0x10000 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4617 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4618 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4619 // 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
|
4620 // 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
|
4621 // 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
|
4622 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4623 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
|
4624 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4625 if (strlen(path) > MAX_PATH - 1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4626 errno = ENAMETOOLONG; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4627 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4628 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4629 int fd; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4630 int o_delete = (oflag & O_DELETE); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4631 oflag = oflag & ~O_DELETE; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4632 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4633 fd = ::open64(path, oflag, mode); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4634 if (fd == -1) return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4635 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4636 //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
|
4637 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4638 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4639 int ret = ::fstat64(fd, &buf64); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4640 int st_mode = buf64.st_mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4641 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4642 if (ret != -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4643 if ((st_mode & S_IFMT) == S_IFDIR) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4644 errno = EISDIR; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4645 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4646 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4647 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4648 } else { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4649 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4650 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4651 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4652 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4653 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4654 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4655 * 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
|
4656 * specifically destined for a subprocess should have the |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4657 * 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
|
4658 * 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
|
4659 * 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
|
4660 * UNIXProcess.c), and this in turn might: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4661 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4662 * - 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
|
4663 * descriptors, resulting in mysterious hangs, or |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4664 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4665 * - 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
|
4666 * suffering from bug 1085341. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4667 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4668 * (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
|
4669 * design flaw) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4670 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4671 * See: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4672 * 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
|
4673 * 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
|
4674 * 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
|
4675 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4676 #ifdef FD_CLOEXEC |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4677 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4678 int flags = ::fcntl(fd, F_GETFD); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4679 if (flags != -1) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4680 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4681 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4682 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4683 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4684 if (o_delete != 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4685 ::unlink(path); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4686 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4687 return fd; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4688 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4689 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4690 |
| 0 | 4691 // create binary file, rewriting existing file if required |
| 4692 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 4693 int oflags = O_WRONLY | O_CREAT; | |
| 4694 if (!rewrite_existing) { | |
| 4695 oflags |= O_EXCL; | |
| 4696 } | |
| 4697 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
| 4698 } | |
| 4699 | |
| 4700 // return current position of file pointer | |
| 4701 jlong os::current_file_offset(int fd) { | |
| 4702 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
| 4703 } | |
| 4704 | |
| 4705 // move file pointer to the specified offset | |
| 4706 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 4707 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
| 4708 } | |
| 4709 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4710 // This code originates from JDK's sysAvailable |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4711 // 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
|
4712 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4713 int os::available(int fd, jlong *bytes) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4714 jlong cur, end; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4715 int mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4716 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4717 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4718 if (::fstat64(fd, &buf64) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4719 mode = buf64.st_mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4720 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
|
4721 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4722 * 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
|
4723 * 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
|
4724 * blocking, interruptible calls in this file. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4725 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4726 int n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4727 if (::ioctl(fd, FIONREAD, &n) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4728 *bytes = n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4729 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4730 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4731 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4732 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4733 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4734 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4735 } 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
|
4736 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4737 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4738 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4739 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4740 *bytes = end - cur; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4741 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4742 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4743 |
|
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
4744 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
|
4745 // 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
|
4746 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
|
4747 |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
4748 //%% 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
|
4749 // 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
|
4750 return (ret < 0) ? 0 : 1; |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
4751 } |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
4752 |
| 0 | 4753 // Map a block of memory. |
| 6197 | 4754 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 4755 char *addr, size_t bytes, bool read_only, |
| 4756 bool allow_exec) { | |
| 4757 int prot; | |
| 5909 | 4758 int flags = MAP_PRIVATE; |
| 0 | 4759 |
| 4760 if (read_only) { | |
| 4761 prot = PROT_READ; | |
| 4762 } else { | |
| 4763 prot = PROT_READ | PROT_WRITE; | |
| 4764 } | |
| 4765 | |
| 4766 if (allow_exec) { | |
| 4767 prot |= PROT_EXEC; | |
| 4768 } | |
| 4769 | |
| 4770 if (addr != NULL) { | |
| 4771 flags |= MAP_FIXED; | |
| 4772 } | |
| 4773 | |
| 4774 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
| 4775 fd, file_offset); | |
| 4776 if (mapped_address == MAP_FAILED) { | |
| 4777 return NULL; | |
| 4778 } | |
| 4779 return mapped_address; | |
| 4780 } | |
| 4781 | |
| 4782 | |
| 4783 // Remap a block of memory. | |
| 6197 | 4784 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 4785 char *addr, size_t bytes, bool read_only, |
| 4786 bool allow_exec) { | |
| 4787 // same as map_memory() on this OS | |
| 4788 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 4789 allow_exec); | |
| 4790 } | |
| 4791 | |
| 4792 | |
| 4793 // Unmap a block of memory. | |
| 6197 | 4794 bool os::pd_unmap_memory(char* addr, size_t bytes) { |
| 0 | 4795 return munmap(addr, bytes) == 0; |
| 4796 } | |
| 4797 | |
| 4798 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time); | |
| 4799 | |
| 4800 static clockid_t thread_cpu_clockid(Thread* thread) { | |
| 4801 pthread_t tid = thread->osthread()->pthread_id(); | |
| 4802 clockid_t clockid; | |
| 4803 | |
| 4804 // Get thread clockid | |
| 4805 int rc = os::Linux::pthread_getcpuclockid(tid, &clockid); | |
| 4806 assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code"); | |
| 4807 return clockid; | |
| 4808 } | |
| 4809 | |
| 4810 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 4811 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 4812 // of a thread. | |
| 4813 // | |
| 4814 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
| 4815 // the fast estimate available on the platform. | |
| 4816 | |
| 4817 jlong os::current_thread_cpu_time() { | |
| 4818 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 4819 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 4820 } else { | |
| 4821 // return user + sys since the cost is the same | |
| 4822 return slow_thread_cpu_time(Thread::current(), true /* user + sys */); | |
| 4823 } | |
| 4824 } | |
| 4825 | |
| 4826 jlong os::thread_cpu_time(Thread* thread) { | |
| 4827 // consistent with what current_thread_cpu_time() returns | |
| 4828 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 4829 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 4830 } else { | |
| 4831 return slow_thread_cpu_time(thread, true /* user + sys */); | |
| 4832 } | |
| 4833 } | |
| 4834 | |
| 4835 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 4836 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 4837 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 4838 } else { | |
| 4839 return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 4840 } | |
| 4841 } | |
| 4842 | |
| 4843 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 4844 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 4845 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 4846 } else { | |
| 4847 return slow_thread_cpu_time(thread, user_sys_cpu_time); | |
| 4848 } | |
| 4849 } | |
| 4850 | |
| 4851 // | |
| 4852 // -1 on error. | |
| 4853 // | |
| 4854 | |
| 4855 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 4856 static bool proc_task_unchecked = true; | |
| 4857 static const char *proc_stat_path = "/proc/%d/stat"; | |
| 4858 pid_t tid = thread->osthread()->thread_id(); | |
| 4859 char *s; | |
| 4860 char stat[2048]; | |
| 4861 int statlen; | |
| 4862 char proc_name[64]; | |
| 4863 int count; | |
| 4864 long sys_time, user_time; | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4865 char cdummy; |
| 0 | 4866 int idummy; |
| 4867 long ldummy; | |
| 4868 FILE *fp; | |
| 4869 | |
| 4870 // The /proc/<tid>/stat aggregates per-process usage on | |
| 4871 // new Linux kernels 2.6+ where NPTL is supported. | |
| 4872 // The /proc/self/task/<tid>/stat still has the per-thread usage. | |
| 4873 // 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
|
4874 // 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
|
4875 // /proc/self/task, so we check its availability. |
| 0 | 4876 if (proc_task_unchecked && os::Linux::is_NPTL()) { |
| 4877 // This is executed only once | |
| 4878 proc_task_unchecked = false; | |
| 4879 fp = fopen("/proc/self/task", "r"); | |
| 4880 if (fp != NULL) { | |
| 4881 proc_stat_path = "/proc/self/task/%d/stat"; | |
| 4882 fclose(fp); | |
| 4883 } | |
| 4884 } | |
| 4885 | |
| 4886 sprintf(proc_name, proc_stat_path, tid); | |
| 4887 fp = fopen(proc_name, "r"); | |
| 4888 if ( fp == NULL ) return -1; | |
| 4889 statlen = fread(stat, 1, 2047, fp); | |
| 4890 stat[statlen] = '\0'; | |
| 4891 fclose(fp); | |
| 4892 | |
| 4893 // Skip pid and the command string. Note that we could be dealing with | |
| 4894 // weird command names, e.g. user could decide to rename java launcher | |
| 4895 // to "java 1.4.2 :)", then the stat file would look like | |
| 4896 // 1234 (java 1.4.2 :)) R ... ... | |
| 4897 // We don't really need to know the command string, just find the last | |
| 4898 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 4899 s = strrchr(stat, ')'); | |
| 4900 if (s == NULL ) return -1; | |
| 4901 | |
| 4902 // Skip blank chars | |
| 4903 do s++; while (isspace(*s)); | |
| 4904 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4905 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
|
4906 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy, |
| 0 | 4907 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy, |
| 4908 &user_time, &sys_time); | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4909 if ( count != 13 ) return -1; |
| 0 | 4910 if (user_sys_cpu_time) { |
| 4911 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); | |
| 4912 } else { | |
| 4913 return (jlong)user_time * (1000000000 / clock_tics_per_sec); | |
| 4914 } | |
| 4915 } | |
| 4916 | |
| 4917 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 4918 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 4919 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 4920 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 4921 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 4922 } | |
| 4923 | |
| 4924 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 4925 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 4926 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 4927 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 4928 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 4929 } | |
| 4930 | |
| 4931 bool os::is_thread_cpu_time_supported() { | |
| 4932 return true; | |
| 4933 } | |
| 4934 | |
| 4935 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 4936 // Linux doesn't yet have a (official) notion of processor sets, | |
| 4937 // so just return the system wide load average. | |
| 4938 int os::loadavg(double loadavg[], int nelem) { | |
| 4939 return ::getloadavg(loadavg, nelem); | |
| 4940 } | |
| 4941 | |
| 4942 void os::pause() { | |
| 4943 char filename[MAX_PATH]; | |
| 4944 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 4945 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 4946 } else { | |
| 4947 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 4948 } | |
| 4949 | |
| 4950 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 4951 if (fd != -1) { | |
| 4952 struct stat buf; | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
4953 ::close(fd); |
| 0 | 4954 while (::stat(filename, &buf) == 0) { |
| 4955 (void)::poll(NULL, 0, 100); | |
| 4956 } | |
| 4957 } else { | |
| 4958 jio_fprintf(stderr, | |
| 4959 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 4960 } | |
| 4961 } | |
| 4962 | |
| 4963 | |
| 4964 // Refer to the comments in os_solaris.cpp park-unpark. | |
| 4965 // | |
| 4966 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can | |
| 4967 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. | |
| 4968 // For specifics regarding the bug see GLIBC BUGID 261237 : | |
| 4969 // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. | |
| 4970 // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future | |
| 4971 // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar | |
| 4972 // is used. (The simple C test-case provided in the GLIBC bug report manifests the | |
| 4973 // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() | |
| 4974 // and monitorenter when we're using 1-0 locking. All those operations may result in | |
| 4975 // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version | |
| 4976 // of libpthread avoids the problem, but isn't practical. | |
| 4977 // | |
| 4978 // Possible remedies: | |
| 4979 // | |
| 4980 // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. | |
| 4981 // This is palliative and probabilistic, however. If the thread is preempted | |
| 4982 // between the call to compute_abstime() and pthread_cond_timedwait(), more | |
| 4983 // than the minimum period may have passed, and the abstime may be stale (in the | |
| 4984 // past) resultin in a hang. Using this technique reduces the odds of a hang | |
| 4985 // but the JVM is still vulnerable, particularly on heavily loaded systems. | |
| 4986 // | |
| 4987 // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead | |
| 4988 // of the usual flag-condvar-mutex idiom. The write side of the pipe is set | |
| 4989 // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) | |
| 4990 // reduces to poll()+read(). This works well, but consumes 2 FDs per extant | |
| 4991 // thread. | |
| 4992 // | |
| 4993 // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread | |
| 4994 // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing | |
| 4995 // a timeout request to the chron thread and then blocking via pthread_cond_wait(). | |
| 4996 // This also works well. In fact it avoids kernel-level scalability impediments | |
| 4997 // on certain platforms that don't handle lots of active pthread_cond_timedwait() | |
| 4998 // timers in a graceful fashion. | |
| 4999 // | |
| 5000 // 4. When the abstime value is in the past it appears that control returns | |
| 5001 // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. | |
| 5002 // Subsequent timedwait/wait calls may hang indefinitely. Given that, we | |
| 5003 // can avoid the problem by reinitializing the condvar -- by cond_destroy() | |
| 5004 // followed by cond_init() -- after all calls to pthread_cond_timedwait(). | |
| 5005 // It may be possible to avoid reinitialization by checking the return | |
| 5006 // value from pthread_cond_timedwait(). In addition to reinitializing the | |
| 5007 // condvar we must establish the invariant that cond_signal() is only called | |
| 5008 // within critical sections protected by the adjunct mutex. This prevents | |
| 5009 // cond_signal() from "seeing" a condvar that's in the midst of being | |
| 5010 // reinitialized or that is corrupt. Sadly, this invariant obviates the | |
| 5011 // desirable signal-after-unlock optimization that avoids futile context switching. | |
| 5012 // | |
| 5013 // I'm also concerned that some versions of NTPL might allocate an auxilliary | |
| 5014 // structure when a condvar is used or initialized. cond_destroy() would | |
| 5015 // release the helper structure. Our reinitialize-after-timedwait fix | |
| 5016 // put excessive stress on malloc/free and locks protecting the c-heap. | |
| 5017 // | |
| 5018 // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. | |
| 5019 // It may be possible to refine (4) by checking the kernel and NTPL verisons | |
| 5020 // and only enabling the work-around for vulnerable environments. | |
| 5021 | |
| 5022 // utility to compute the abstime argument to timedwait: | |
| 5023 // millis is the relative timeout time | |
| 5024 // abstime will be the absolute timeout time | |
| 5025 // TODO: replace compute_abstime() with unpackTime() | |
| 5026 | |
| 5027 static struct timespec* compute_abstime(timespec* abstime, jlong millis) { | |
| 5028 if (millis < 0) millis = 0; | |
| 5029 struct timeval now; | |
| 5030 int status = gettimeofday(&now, NULL); | |
| 5031 assert(status == 0, "gettimeofday"); | |
| 5032 jlong seconds = millis / 1000; | |
| 5033 millis %= 1000; | |
| 5034 if (seconds > 50000000) { // see man cond_timedwait(3T) | |
| 5035 seconds = 50000000; | |
| 5036 } | |
| 5037 abstime->tv_sec = now.tv_sec + seconds; | |
| 5038 long usec = now.tv_usec + millis * 1000; | |
| 5039 if (usec >= 1000000) { | |
| 5040 abstime->tv_sec += 1; | |
| 5041 usec -= 1000000; | |
| 5042 } | |
| 5043 abstime->tv_nsec = usec * 1000; | |
| 5044 return abstime; | |
| 5045 } | |
| 5046 | |
| 5047 | |
| 5048 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
| 5049 // Conceptually TryPark() should be equivalent to park(0). | |
| 5050 | |
| 5051 int os::PlatformEvent::TryPark() { | |
| 5052 for (;;) { | |
| 5053 const int v = _Event ; | |
| 5054 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 5055 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
| 5056 } | |
| 5057 } | |
| 5058 | |
| 5059 void os::PlatformEvent::park() { // AKA "down()" | |
| 5060 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 5061 // may call park(). | |
| 5062 // TODO: assert that _Assoc != NULL or _Assoc == Self | |
| 5063 int v ; | |
| 5064 for (;;) { | |
| 5065 v = _Event ; | |
| 5066 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5067 } | |
| 5068 guarantee (v >= 0, "invariant") ; | |
| 5069 if (v == 0) { | |
| 5070 // Do this the hard way by blocking ... | |
| 5071 int status = pthread_mutex_lock(_mutex); | |
| 5072 assert_status(status == 0, status, "mutex_lock"); | |
| 5073 guarantee (_nParked == 0, "invariant") ; | |
| 5074 ++ _nParked ; | |
| 5075 while (_Event < 0) { | |
| 5076 status = pthread_cond_wait(_cond, _mutex); | |
| 5077 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
| 5078 // Treat this the same as if the wait was interrupted | |
| 5079 if (status == ETIME) { status = EINTR; } | |
| 5080 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
| 5081 } | |
| 5082 -- _nParked ; | |
| 5083 | |
| 5084 _Event = 0 ; | |
| 5085 status = pthread_mutex_unlock(_mutex); | |
| 5086 assert_status(status == 0, status, "mutex_unlock"); | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5087 // 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
|
5088 // correctly with each other. |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5089 OrderAccess::fence(); |
| 0 | 5090 } |
| 5091 guarantee (_Event >= 0, "invariant") ; | |
| 5092 } | |
| 5093 | |
| 5094 int os::PlatformEvent::park(jlong millis) { | |
| 5095 guarantee (_nParked == 0, "invariant") ; | |
| 5096 | |
| 5097 int v ; | |
| 5098 for (;;) { | |
| 5099 v = _Event ; | |
| 5100 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5101 } | |
| 5102 guarantee (v >= 0, "invariant") ; | |
| 5103 if (v != 0) return OS_OK ; | |
| 5104 | |
| 5105 // We do this the hard way, by blocking the thread. | |
| 5106 // Consider enforcing a minimum timeout value. | |
| 5107 struct timespec abst; | |
| 5108 compute_abstime(&abst, millis); | |
| 5109 | |
| 5110 int ret = OS_TIMEOUT; | |
| 5111 int status = pthread_mutex_lock(_mutex); | |
| 5112 assert_status(status == 0, status, "mutex_lock"); | |
| 5113 guarantee (_nParked == 0, "invariant") ; | |
| 5114 ++_nParked ; | |
| 5115 | |
| 5116 // Object.wait(timo) will return because of | |
| 5117 // (a) notification | |
| 5118 // (b) timeout | |
| 5119 // (c) thread.interrupt | |
| 5120 // | |
| 5121 // Thread.interrupt and object.notify{All} both call Event::set. | |
| 5122 // That is, we treat thread.interrupt as a special case of notification. | |
| 5123 // The underlying Solaris implementation, cond_timedwait, admits | |
| 5124 // spurious/premature wakeups, but the JLS/JVM spec prevents the | |
| 5125 // JVM from making those visible to Java code. As such, we must | |
| 5126 // filter out spurious wakeups. We assume all ETIME returns are valid. | |
| 5127 // | |
| 5128 // TODO: properly differentiate simultaneous notify+interrupt. | |
| 5129 // In that case, we should propagate the notify to another waiter. | |
| 5130 | |
| 5131 while (_Event < 0) { | |
| 5132 status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst); | |
| 5133 if (status != 0 && WorkAroundNPTLTimedWaitHang) { | |
| 5134 pthread_cond_destroy (_cond); | |
| 5135 pthread_cond_init (_cond, NULL) ; | |
| 5136 } | |
| 5137 assert_status(status == 0 || status == EINTR || | |
| 5138 status == ETIME || status == ETIMEDOUT, | |
| 5139 status, "cond_timedwait"); | |
| 5140 if (!FilterSpuriousWakeups) break ; // previous semantics | |
| 5141 if (status == ETIME || status == ETIMEDOUT) break ; | |
| 5142 // We consume and ignore EINTR and spurious wakeups. | |
| 5143 } | |
| 5144 --_nParked ; | |
| 5145 if (_Event >= 0) { | |
| 5146 ret = OS_OK; | |
| 5147 } | |
| 5148 _Event = 0 ; | |
| 5149 status = pthread_mutex_unlock(_mutex); | |
| 5150 assert_status(status == 0, status, "mutex_unlock"); | |
| 5151 assert (_nParked == 0, "invariant") ; | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5152 // 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
|
5153 // correctly with each other. |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5154 OrderAccess::fence(); |
| 0 | 5155 return ret; |
| 5156 } | |
| 5157 | |
| 5158 void os::PlatformEvent::unpark() { | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5159 // Transitions for _Event: |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5160 // 0 :=> 1 |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5161 // 1 :=> 1 |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5162 // -1 :=> either 0 or 1; must signal target thread |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5163 // 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
|
5164 // 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
|
5165 // unpark() calls. |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5166 // See also: "Semaphores in Plan 9" by Mullender & Cox |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5167 // |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5168 // 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
|
5169 // 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
|
5170 // 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
|
5171 // 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
|
5172 // 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
|
5173 |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5174 if (Atomic::xchg(1, &_Event) >= 0) return; |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5175 |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5176 // 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
|
5177 int status = pthread_mutex_lock(_mutex); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5178 assert_status(status == 0, status, "mutex_lock"); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5179 int AnyWaiters = _nParked; |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5180 assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5181 if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5182 AnyWaiters = 0; |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5183 pthread_cond_signal(_cond); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5184 } |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5185 status = pthread_mutex_unlock(_mutex); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5186 assert_status(status == 0, status, "mutex_unlock"); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5187 if (AnyWaiters != 0) { |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5188 status = pthread_cond_signal(_cond); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5189 assert_status(status == 0, status, "cond_signal"); |
| 0 | 5190 } |
| 5191 | |
| 5192 // Note that we signal() _after dropping the lock for "immortal" Events. | |
| 5193 // This is safe and avoids a common class of futile wakeups. In rare | |
| 5194 // circumstances this can cause a thread to return prematurely from | |
| 5195 // cond_{timed}wait() but the spurious wakeup is benign and the victim will | |
| 5196 // simply re-test the condition and re-park itself. | |
| 5197 } | |
| 5198 | |
| 5199 | |
| 5200 // JSR166 | |
| 5201 // ------------------------------------------------------- | |
| 5202 | |
| 5203 /* | |
| 5204 * The solaris and linux implementations of park/unpark are fairly | |
| 5205 * conservative for now, but can be improved. They currently use a | |
| 5206 * mutex/condvar pair, plus a a count. | |
| 5207 * Park decrements count if > 0, else does a condvar wait. Unpark | |
| 5208 * sets count to 1 and signals condvar. Only one thread ever waits | |
| 5209 * on the condvar. Contention seen when trying to park implies that someone | |
| 5210 * is unparking you, so don't wait. And spurious returns are fine, so there | |
| 5211 * is no need to track notifications. | |
| 5212 */ | |
| 5213 | |
| 5214 #define MAX_SECS 100000000 | |
| 5215 /* | |
| 5216 * This code is common to linux and solaris and will be moved to a | |
| 5217 * common place in dolphin. | |
| 5218 * | |
| 5219 * The passed in time value is either a relative time in nanoseconds | |
| 5220 * or an absolute time in milliseconds. Either way it has to be unpacked | |
| 5221 * into suitable seconds and nanoseconds components and stored in the | |
| 5222 * given timespec structure. | |
| 5223 * Given time is a 64-bit value and the time_t used in the timespec is only | |
| 5224 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
| 5225 * overflow if times way in the future are given. Further on Solaris versions | |
| 5226 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
| 5227 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
| 5228 * As it will be 28 years before "now + 100000000" will overflow we can | |
| 5229 * ignore overflow and just impose a hard-limit on seconds using the value | |
| 5230 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
| 5231 * years from "now". | |
| 5232 */ | |
| 5233 | |
| 5234 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
| 5235 assert (time > 0, "convertTime"); | |
| 5236 | |
| 5237 struct timeval now; | |
| 5238 int status = gettimeofday(&now, NULL); | |
| 5239 assert(status == 0, "gettimeofday"); | |
| 5240 | |
| 5241 time_t max_secs = now.tv_sec + MAX_SECS; | |
| 5242 | |
| 5243 if (isAbsolute) { | |
| 5244 jlong secs = time / 1000; | |
| 5245 if (secs > max_secs) { | |
| 5246 absTime->tv_sec = max_secs; | |
| 5247 } | |
| 5248 else { | |
| 5249 absTime->tv_sec = secs; | |
| 5250 } | |
| 5251 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; | |
| 5252 } | |
| 5253 else { | |
| 5254 jlong secs = time / NANOSECS_PER_SEC; | |
| 5255 if (secs >= MAX_SECS) { | |
| 5256 absTime->tv_sec = max_secs; | |
| 5257 absTime->tv_nsec = 0; | |
| 5258 } | |
| 5259 else { | |
| 5260 absTime->tv_sec = now.tv_sec + secs; | |
| 5261 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; | |
| 5262 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { | |
| 5263 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
| 5264 ++absTime->tv_sec; // note: this must be <= max_secs | |
| 5265 } | |
| 5266 } | |
| 5267 } | |
| 5268 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
| 5269 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
| 5270 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
| 5271 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
| 5272 } | |
| 5273 | |
| 5274 void Parker::park(bool isAbsolute, jlong time) { | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5275 // Ideally we'd do something useful while spinning, such |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5276 // as calling unpackTime(). |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5277 |
| 0 | 5278 // Optional fast-path check: |
| 5279 // Return immediately if a permit is available. | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5280 // We depend on Atomic::xchg() having full barrier semantics |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5281 // 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
|
5282 if (Atomic::xchg(0, &_counter) > 0) return; |
| 0 | 5283 |
| 5284 Thread* thread = Thread::current(); | |
| 5285 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 5286 JavaThread *jt = (JavaThread *)thread; | |
| 5287 | |
| 5288 // Optional optimization -- avoid state transitions if there's an interrupt pending. | |
| 5289 // Check interrupt before trying to wait | |
| 5290 if (Thread::is_interrupted(thread, false)) { | |
| 5291 return; | |
| 5292 } | |
| 5293 | |
| 5294 // Next, demultiplex/decode time arguments | |
| 5295 timespec absTime; | |
|
1865
1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
acorn
parents:
1750
diff
changeset
|
5296 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
| 0 | 5297 return; |
| 5298 } | |
| 5299 if (time > 0) { | |
| 5300 unpackTime(&absTime, isAbsolute, time); | |
| 5301 } | |
| 5302 | |
| 5303 | |
| 5304 // Enter safepoint region | |
| 5305 // Beware of deadlocks such as 6317397. | |
| 5306 // The per-thread Parker:: mutex is a classic leaf-lock. | |
| 5307 // In particular a thread must never block on the Threads_lock while | |
| 5308 // holding the Parker:: mutex. If safepoints are pending both the | |
| 5309 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
| 5310 ThreadBlockInVM tbivm(jt); | |
| 5311 | |
| 5312 // Don't wait if cannot get lock since interference arises from | |
| 5313 // unblocking. Also. check interrupt before trying wait | |
| 5314 if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { | |
| 5315 return; | |
| 5316 } | |
| 5317 | |
| 5318 int status ; | |
| 5319 if (_counter > 0) { // no wait needed | |
| 5320 _counter = 0; | |
| 5321 status = pthread_mutex_unlock(_mutex); | |
| 5322 assert (status == 0, "invariant") ; | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5323 // 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
|
5324 // 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
|
5325 OrderAccess::fence(); |
| 0 | 5326 return; |
| 5327 } | |
| 5328 | |
| 5329 #ifdef ASSERT | |
| 5330 // Don't catch signals while blocked; let the running threads have the signals. | |
| 5331 // (This allows a debugger to break into the running thread.) | |
| 5332 sigset_t oldsigs; | |
| 5333 sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals(); | |
| 5334 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
| 5335 #endif | |
| 5336 | |
| 5337 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 5338 jt->set_suspend_equivalent(); | |
| 5339 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 5340 | |
| 5341 if (time == 0) { | |
| 5342 status = pthread_cond_wait (_cond, _mutex) ; | |
| 5343 } else { | |
| 5344 status = os::Linux::safe_cond_timedwait (_cond, _mutex, &absTime) ; | |
| 5345 if (status != 0 && WorkAroundNPTLTimedWaitHang) { | |
| 5346 pthread_cond_destroy (_cond) ; | |
| 5347 pthread_cond_init (_cond, NULL); | |
| 5348 } | |
| 5349 } | |
| 5350 assert_status(status == 0 || status == EINTR || | |
| 5351 status == ETIME || status == ETIMEDOUT, | |
| 5352 status, "cond_timedwait"); | |
| 5353 | |
| 5354 #ifdef ASSERT | |
| 5355 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); | |
| 5356 #endif | |
| 5357 | |
| 5358 _counter = 0 ; | |
| 5359 status = pthread_mutex_unlock(_mutex) ; | |
| 5360 assert_status(status == 0, status, "invariant") ; | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5361 // 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
|
5362 // correctly with each other and Java-level accesses. |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5363 OrderAccess::fence(); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5364 |
| 0 | 5365 // If externally suspended while waiting, re-suspend |
| 5366 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 5367 jt->java_suspend_self(); | |
| 5368 } | |
| 5369 } | |
| 5370 | |
| 5371 void Parker::unpark() { | |
| 5372 int s, status ; | |
| 5373 status = pthread_mutex_lock(_mutex); | |
| 5374 assert (status == 0, "invariant") ; | |
| 5375 s = _counter; | |
| 5376 _counter = 1; | |
| 5377 if (s < 1) { | |
| 5378 if (WorkAroundNPTLTimedWaitHang) { | |
| 5379 status = pthread_cond_signal (_cond) ; | |
| 5380 assert (status == 0, "invariant") ; | |
| 5381 status = pthread_mutex_unlock(_mutex); | |
| 5382 assert (status == 0, "invariant") ; | |
| 5383 } else { | |
| 5384 status = pthread_mutex_unlock(_mutex); | |
| 5385 assert (status == 0, "invariant") ; | |
| 5386 status = pthread_cond_signal (_cond) ; | |
| 5387 assert (status == 0, "invariant") ; | |
| 5388 } | |
| 5389 } else { | |
| 5390 pthread_mutex_unlock(_mutex); | |
| 5391 assert (status == 0, "invariant") ; | |
| 5392 } | |
| 5393 } | |
| 5394 | |
| 5395 | |
| 5396 extern char** environ; | |
| 5397 | |
| 5398 #ifndef __NR_fork | |
| 5399 #define __NR_fork IA32_ONLY(2) IA64_ONLY(not defined) AMD64_ONLY(57) | |
| 5400 #endif | |
| 5401 | |
| 5402 #ifndef __NR_execve | |
| 5403 #define __NR_execve IA32_ONLY(11) IA64_ONLY(1033) AMD64_ONLY(59) | |
| 5404 #endif | |
| 5405 | |
| 5406 // Run the specified command in a separate process. Return its exit value, | |
| 5407 // or -1 on failure (e.g. can't fork a new process). | |
| 5408 // Unlike system(), this function can be called from signal handler. It | |
| 5409 // doesn't block SIGINT et al. | |
| 5410 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
|
5411 const char * argv[4] = {"sh", "-c", cmd, NULL}; |
| 0 | 5412 |
| 5413 // fork() in LinuxThreads/NPTL is not async-safe. It needs to run | |
| 5414 // pthread_atfork handlers and reset pthread library. All we need is a | |
| 5415 // separate process to execve. Make a direct syscall to fork process. | |
| 5416 // On IA64 there's no fork syscall, we have to use fork() and hope for | |
| 5417 // the best... | |
| 5418 pid_t pid = NOT_IA64(syscall(__NR_fork);) | |
| 5419 IA64_ONLY(fork();) | |
| 5420 | |
| 5421 if (pid < 0) { | |
| 5422 // fork failed | |
| 5423 return -1; | |
| 5424 | |
| 5425 } else if (pid == 0) { | |
| 5426 // child process | |
| 5427 | |
| 5428 // execve() in LinuxThreads will call pthread_kill_other_threads_np() | |
| 5429 // first to kill every thread on the thread list. Because this list is | |
| 5430 // not reset by fork() (see notes above), execve() will instead kill | |
| 5431 // every thread in the parent process. We know this is the only thread | |
| 5432 // in the new process, so make a system call directly. | |
| 5433 // IA64 should use normal execve() from glibc to match the glibc fork() | |
| 5434 // above. | |
| 5435 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
|
5436 IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);) |
| 0 | 5437 |
| 5438 // execve failed | |
| 5439 _exit(-1); | |
| 5440 | |
| 5441 } else { | |
| 5442 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
| 5443 // care about the actual exit code, for now. | |
| 5444 | |
| 5445 int status; | |
| 5446 | |
| 5447 // Wait for the child process to exit. This returns immediately if | |
| 5448 // the child has already exited. */ | |
| 5449 while (waitpid(pid, &status, 0) < 0) { | |
| 5450 switch (errno) { | |
| 5451 case ECHILD: return 0; | |
| 5452 case EINTR: break; | |
| 5453 default: return -1; | |
| 5454 } | |
| 5455 } | |
| 5456 | |
| 5457 if (WIFEXITED(status)) { | |
| 5458 // The child exited normally; get its exit code. | |
| 5459 return WEXITSTATUS(status); | |
| 5460 } else if (WIFSIGNALED(status)) { | |
| 5461 // The child exited because of a signal | |
| 5462 // The best value to return is 0x80 + signal number, | |
| 5463 // because that is what all Unix shells do, and because | |
| 5464 // it allows callers to distinguish between process exit and | |
| 5465 // process death by signal. | |
| 5466 return 0x80 + WTERMSIG(status); | |
| 5467 } else { | |
| 5468 // Unknown exit code; pass it through | |
| 5469 return status; | |
| 5470 } | |
| 5471 } | |
| 5472 } | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5473 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5474 // is_headless_jre() |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5475 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
5476 // 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
|
5477 // 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
|
5478 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
5479 // 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
|
5480 // 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
|
5481 // |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5482 bool os::is_headless_jre() { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5483 struct stat statbuf; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5484 char buf[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5485 char libmawtpath[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5486 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
|
5487 const char *new_xawtstr = "/libawt_xawt.so"; |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5488 char *p; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5489 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5490 // Get path to libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5491 os::jvm_path(buf, sizeof(buf)); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5492 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5493 // Get rid of libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5494 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5495 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5496 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5497 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5498 // Get rid of client or server |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5499 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5500 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5501 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5502 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5503 // check xawt/libmawt.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5504 strcpy(libmawtpath, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5505 strcat(libmawtpath, xawtstr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5506 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5507 |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
5508 // check libawt_xawt.so |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5509 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
|
5510 strcat(libmawtpath, new_xawtstr); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5511 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5512 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5513 return true; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5514 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5515 |
|
6200
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5516 // Get the default path to the core file |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5517 // Returns the length of the string |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5518 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
|
5519 const char* p = get_current_directory(buffer, bufferSize); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5520 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5521 if (p == NULL) { |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5522 assert(p != NULL, "failed to get current directory"); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5523 return 0; |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5524 } |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5525 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5526 return strlen(buffer); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
5527 } |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5528 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5529 #ifdef JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5530 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5531 // 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
|
5532 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5533 MemNotifyThread* MemNotifyThread::_memnotify_thread = NULL; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5534 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5535 // ctor |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5536 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5537 MemNotifyThread::MemNotifyThread(int fd): Thread() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5538 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
|
5539 _fd = fd; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5540 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5541 if (os::create_thread(this, os::os_thread)) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5542 _memnotify_thread = this; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5543 os::set_priority(this, NearMaxPriority); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5544 os::start_thread(this); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5545 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5546 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5547 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5548 // Where all the work gets done |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5549 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5550 void MemNotifyThread::run() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5551 assert(this == memnotify_thread(), "expected the singleton MemNotifyThread"); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5552 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5553 // Set up the select arguments |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5554 fd_set rfds; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5555 if (_fd != -1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5556 FD_ZERO(&rfds); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5557 FD_SET(_fd, &rfds); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5558 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5559 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5560 // 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
|
5561 while (1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5562 // 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
|
5563 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
|
5564 if (rc == -1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5565 perror("select!\n"); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5566 break; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5567 } else if (rc) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5568 //ssize_t free_before = os::available_memory(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5569 //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
|
5570 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5571 // 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
|
5572 // try to do something about that |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5573 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5574 // 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
|
5575 if (!Universe::heap()->is_gc_active()) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5576 Universe::heap()->collect(GCCause::_allocation_failure); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5577 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5578 //ssize_t free_after = os::available_memory(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5579 //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
|
5580 //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
|
5581 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5582 // 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
|
5583 // 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
|
5584 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5585 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5586 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5587 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5588 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5589 // 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
|
5590 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5591 void MemNotifyThread::start() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5592 int fd; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5593 fd = open ("/dev/mem_notify", O_RDONLY, 0); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5594 if (fd < 0) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5595 return; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5596 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5597 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5598 if (memnotify_thread() == NULL) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5599 new MemNotifyThread(fd); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5600 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5601 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
5602 #endif // JAVASE_EMBEDDED |