Mercurial > hg > graal-jvmci-8
annotate src/os/linux/vm/os_linux.cpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | 8128b98d4736 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2016, 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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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" | |
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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" | |
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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" | |
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52 #include "runtime/orderAccess.inline.hpp" |
1972 | 53 #include "runtime/osThread.hpp" |
54 #include "runtime/perfMemory.hpp" | |
55 #include "runtime/sharedRuntime.hpp" | |
56 #include "runtime/statSampler.hpp" | |
57 #include "runtime/stubRoutines.hpp" | |
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58 #include "runtime/thread.inline.hpp" |
1972 | 59 #include "runtime/threadCritical.hpp" |
60 #include "runtime/timer.hpp" | |
61 #include "services/attachListener.hpp" | |
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62 #include "services/memTracker.hpp" |
1972 | 63 #include "services/runtimeService.hpp" |
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64 #include "utilities/decoder.hpp" |
1972 | 65 #include "utilities/defaultStream.hpp" |
66 #include "utilities/events.hpp" | |
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67 #include "utilities/elfFile.hpp" |
1972 | 68 #include "utilities/growableArray.hpp" |
69 #include "utilities/vmError.hpp" | |
0 | 70 |
71 // put OS-includes here | |
72 # include <sys/types.h> | |
73 # include <sys/mman.h> | |
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74 # include <sys/stat.h> |
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75 # include <sys/select.h> |
0 | 76 # include <pthread.h> |
77 # include <signal.h> | |
78 # include <errno.h> | |
79 # include <dlfcn.h> | |
80 # include <stdio.h> | |
81 # include <unistd.h> | |
82 # include <sys/resource.h> | |
83 # include <pthread.h> | |
84 # include <sys/stat.h> | |
85 # include <sys/time.h> | |
86 # include <sys/times.h> | |
87 # include <sys/utsname.h> | |
88 # include <sys/socket.h> | |
89 # include <sys/wait.h> | |
90 # include <pwd.h> | |
91 # include <poll.h> | |
92 # include <semaphore.h> | |
93 # include <fcntl.h> | |
94 # include <string.h> | |
95 # include <syscall.h> | |
96 # include <sys/sysinfo.h> | |
97 # include <gnu/libc-version.h> | |
98 # include <sys/ipc.h> | |
99 # include <sys/shm.h> | |
100 # include <link.h> | |
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101 # include <stdint.h> |
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102 # include <inttypes.h> |
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103 # include <sys/ioctl.h> |
0 | 104 |
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105 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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106 |
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107 #ifndef _GNU_SOURCE |
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108 #define _GNU_SOURCE |
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109 #include <sched.h> |
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110 #undef _GNU_SOURCE |
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111 #else |
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112 #include <sched.h> |
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113 #endif |
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114 |
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115 // if RUSAGE_THREAD for getrusage() has not been defined, do it here. The code calling |
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116 // getrusage() is prepared to handle the associated failure. |
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117 #ifndef RUSAGE_THREAD |
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118 #define RUSAGE_THREAD (1) /* only the calling thread */ |
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119 #endif |
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120 |
0 | 121 #define MAX_PATH (2 * K) |
122 | |
17738 | 123 #define MAX_SECS 100000000 |
124 | |
0 | 125 // for timer info max values which include all bits |
126 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
127 | |
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128 #define LARGEPAGES_BIT (1 << 6) |
0 | 129 //////////////////////////////////////////////////////////////////////////////// |
130 // global variables | |
131 julong os::Linux::_physical_memory = 0; | |
132 | |
133 address os::Linux::_initial_thread_stack_bottom = NULL; | |
134 uintptr_t os::Linux::_initial_thread_stack_size = 0; | |
135 | |
136 int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL; | |
137 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL; | |
138 Mutex* os::Linux::_createThread_lock = NULL; | |
139 pthread_t os::Linux::_main_thread; | |
140 int os::Linux::_page_size = -1; | |
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141 const int os::Linux::_vm_default_page_size = (8 * K); |
0 | 142 bool os::Linux::_is_floating_stack = false; |
143 bool os::Linux::_is_NPTL = false; | |
144 bool os::Linux::_supports_fast_thread_cpu_time = false; | |
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145 const char * os::Linux::_glibc_version = NULL; |
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146 const char * os::Linux::_libpthread_version = NULL; |
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147 pthread_condattr_t os::Linux::_condattr[1]; |
0 | 148 |
149 static jlong initial_time_count=0; | |
150 | |
151 static int clock_tics_per_sec = 100; | |
152 | |
153 // For diagnostics to print a message once. see run_periodic_checks | |
154 static sigset_t check_signal_done; | |
14391 | 155 static bool check_signals = true; |
0 | 156 |
157 static pid_t _initial_pid = 0; | |
158 | |
159 /* Signal number used to suspend/resume a thread */ | |
160 | |
161 /* do not use any signal number less than SIGSEGV, see 4355769 */ | |
162 static int SR_signum = SIGUSR2; | |
163 sigset_t SR_sigset; | |
164 | |
242 | 165 /* Used to protect dlsym() calls */ |
166 static pthread_mutex_t dl_mutex; | |
167 | |
10405 | 168 // Declarations |
169 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); | |
170 | |
0 | 171 // utility functions |
172 | |
173 static int SR_initialize(); | |
174 | |
175 julong os::available_memory() { | |
176 return Linux::available_memory(); | |
177 } | |
178 | |
179 julong os::Linux::available_memory() { | |
180 // values in struct sysinfo are "unsigned long" | |
181 struct sysinfo si; | |
182 sysinfo(&si); | |
183 | |
184 return (julong)si.freeram * si.mem_unit; | |
185 } | |
186 | |
187 julong os::physical_memory() { | |
188 return Linux::physical_memory(); | |
189 } | |
190 | |
191 //////////////////////////////////////////////////////////////////////////////// | |
192 // environment support | |
193 | |
194 bool os::getenv(const char* name, char* buf, int len) { | |
195 const char* val = ::getenv(name); | |
196 if (val != NULL && strlen(val) < (size_t)len) { | |
197 strcpy(buf, val); | |
198 return true; | |
199 } | |
200 if (len > 0) buf[0] = 0; // return a null string | |
201 return false; | |
202 } | |
203 | |
204 | |
205 // Return true if user is running as root. | |
206 | |
207 bool os::have_special_privileges() { | |
208 static bool init = false; | |
209 static bool privileges = false; | |
210 if (!init) { | |
211 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
212 init = true; | |
213 } | |
214 return privileges; | |
215 } | |
216 | |
217 | |
218 #ifndef SYS_gettid | |
219 // i386: 224, ia64: 1105, amd64: 186, sparc 143 | |
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220 #ifdef __ia64__ |
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221 #define SYS_gettid 1105 |
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222 #else |
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223 #ifdef __i386__ |
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224 #define SYS_gettid 224 |
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225 #else |
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226 #ifdef __amd64__ |
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227 #define SYS_gettid 186 |
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228 #else |
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229 #ifdef __sparc__ |
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230 #define SYS_gettid 143 |
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231 #else |
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232 #error define gettid for the arch |
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233 #endif |
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234 #endif |
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235 #endif |
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236 #endif |
0 | 237 #endif |
238 | |
239 // Cpu architecture string | |
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240 static char cpu_arch[] = HOTSPOT_LIB_ARCH; |
0 | 241 |
242 // pid_t gettid() | |
243 // | |
244 // Returns the kernel thread id of the currently running thread. Kernel | |
245 // thread id is used to access /proc. | |
246 // | |
247 // (Note that getpid() on LinuxThreads returns kernel thread id too; but | |
248 // on NPTL, it returns the same pid for all threads, as required by POSIX.) | |
249 // | |
250 pid_t os::Linux::gettid() { | |
251 int rslt = syscall(SYS_gettid); | |
252 if (rslt == -1) { | |
253 // old kernel, no NPTL support | |
254 return getpid(); | |
255 } else { | |
256 return (pid_t)rslt; | |
257 } | |
258 } | |
259 | |
260 // Most versions of linux have a bug where the number of processors are | |
261 // determined by looking at the /proc file system. In a chroot environment, | |
262 // the system call returns 1. This causes the VM to act as if it is | |
263 // a single processor and elide locking (see is_MP() call). | |
264 static bool unsafe_chroot_detected = false; | |
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265 static const char *unstable_chroot_error = "/proc file system not found.\n" |
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266 "Java may be unstable running multithreaded in a chroot " |
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267 "environment on Linux when /proc filesystem is not mounted."; |
0 | 268 |
269 void os::Linux::initialize_system_info() { | |
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270 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); |
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271 if (processor_count() == 1) { |
0 | 272 pid_t pid = os::Linux::gettid(); |
273 char fname[32]; | |
274 jio_snprintf(fname, sizeof(fname), "/proc/%d", pid); | |
275 FILE *fp = fopen(fname, "r"); | |
276 if (fp == NULL) { | |
277 unsafe_chroot_detected = true; | |
278 } else { | |
279 fclose(fp); | |
280 } | |
281 } | |
282 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
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283 assert(processor_count() > 0, "linux error"); |
0 | 284 } |
285 | |
286 void os::init_system_properties_values() { | |
287 // The next steps are taken in the product version: | |
288 // | |
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289 // Obtain the JAVA_HOME value from the location of libjvm.so. |
0 | 290 // This library should be located at: |
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291 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
0 | 292 // |
293 // If "/jre/lib/" appears at the right place in the path, then we | |
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294 // assume libjvm.so is installed in a JDK and we use this path. |
0 | 295 // |
296 // Otherwise exit with message: "Could not create the Java virtual machine." | |
297 // | |
298 // The following extra steps are taken in the debugging version: | |
299 // | |
300 // If "/jre/lib/" does NOT appear at the right place in the path | |
301 // instead of exit check for $JAVA_HOME environment variable. | |
302 // | |
303 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
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304 // then we append a fake suffix "hotspot/libjvm.so" to this path so |
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305 // it looks like libjvm.so is installed there |
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306 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
0 | 307 // |
308 // Otherwise exit. | |
309 // | |
310 // Important note: if the location of libjvm.so changes this | |
311 // code needs to be changed accordingly. | |
312 | |
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313 // See ld(1): |
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314 // The linker uses the following search paths to locate required |
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315 // shared libraries: |
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316 // 1: ... |
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317 // ... |
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318 // 7: The default directories, normally /lib and /usr/lib. |
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319 #if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390)) |
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320 #define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib" |
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321 #else |
0 | 322 #define DEFAULT_LIBPATH "/lib:/usr/lib" |
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323 #endif |
0 | 324 |
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325 // Base path of extensions installed on the system. |
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326 #define SYS_EXT_DIR "/usr/java/packages" |
0 | 327 #define EXTENSIONS_DIR "/lib/ext" |
328 #define ENDORSED_DIR "/lib/endorsed" | |
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329 |
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330 // Buffer that fits several sprintfs. |
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331 // Note that the space for the colon and the trailing null are provided |
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332 // by the nulls included by the sizeof operator. |
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333 const size_t bufsize = |
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334 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. |
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335 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir |
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336 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir |
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337 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
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338 |
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339 // sysclasspath, java_home, dll_dir |
0 | 340 { |
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341 char *pslash; |
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342 os::jvm_path(buf, bufsize); |
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343 |
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344 // Found the full path to libjvm.so. |
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345 // Now cut the path to <java_home>/jre if we can. |
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346 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
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347 pslash = strrchr(buf, '/'); |
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348 if (pslash != NULL) { |
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349 *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
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350 } |
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351 Arguments::set_dll_dir(buf); |
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352 |
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353 if (pslash != NULL) { |
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354 pslash = strrchr(buf, '/'); |
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355 if (pslash != NULL) { |
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356 *pslash = '\0'; // Get rid of /<arch>. |
0 | 357 pslash = strrchr(buf, '/'); |
358 if (pslash != NULL) { | |
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359 *pslash = '\0'; // Get rid of /lib. |
0 | 360 } |
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361 } |
0 | 362 } |
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363 Arguments::set_java_home(buf); |
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364 set_boot_path('/', ':'); |
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365 } |
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366 |
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367 // Where to look for native libraries. |
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368 // |
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369 // Note: Due to a legacy implementation, most of the library path |
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370 // is set in the launcher. This was to accomodate linking restrictions |
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371 // on legacy Linux implementations (which are no longer supported). |
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372 // Eventually, all the library path setting will be done here. |
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373 // |
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374 // However, to prevent the proliferation of improperly built native |
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375 // libraries, the new path component /usr/java/packages is added here. |
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376 // Eventually, all the library path setting will be done here. |
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377 { |
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378 // Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
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379 // should always exist (until the legacy problem cited above is |
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380 // addressed). |
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381 const char *v = ::getenv("LD_LIBRARY_PATH"); |
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382 const char *v_colon = ":"; |
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383 if (v == NULL) { v = ""; v_colon = ""; } |
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384 // That's +1 for the colon and +1 for the trailing '\0'. |
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385 char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, |
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386 strlen(v) + 1 + |
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387 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH) + 1, |
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388 mtInternal); |
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389 sprintf(ld_library_path, "%s%s" SYS_EXT_DIR "/lib/%s:" DEFAULT_LIBPATH, v, v_colon, cpu_arch); |
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390 Arguments::set_library_path(ld_library_path); |
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391 FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); |
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392 } |
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393 |
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394 // Extensions directories. |
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395 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); |
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396 Arguments::set_ext_dirs(buf); |
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397 |
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398 // Endorsed standards default directory. |
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399 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
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400 Arguments::set_endorsed_dirs(buf); |
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401 |
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402 FREE_C_HEAP_ARRAY(char, buf, mtInternal); |
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403 |
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404 #undef DEFAULT_LIBPATH |
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405 #undef SYS_EXT_DIR |
0 | 406 #undef EXTENSIONS_DIR |
407 #undef ENDORSED_DIR | |
408 } | |
409 | |
410 //////////////////////////////////////////////////////////////////////////////// | |
411 // breakpoint support | |
412 | |
413 void os::breakpoint() { | |
414 BREAKPOINT; | |
415 } | |
416 | |
417 extern "C" void breakpoint() { | |
418 // use debugger to set breakpoint here | |
419 } | |
420 | |
421 //////////////////////////////////////////////////////////////////////////////// | |
422 // signal support | |
423 | |
424 debug_only(static bool signal_sets_initialized = false); | |
425 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
426 | |
427 bool os::Linux::is_sig_ignored(int sig) { | |
428 struct sigaction oact; | |
429 sigaction(sig, (struct sigaction*)NULL, &oact); | |
430 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
431 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
432 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
433 return true; | |
434 else | |
435 return false; | |
436 } | |
437 | |
438 void os::Linux::signal_sets_init() { | |
439 // Should also have an assertion stating we are still single-threaded. | |
440 assert(!signal_sets_initialized, "Already initialized"); | |
441 // Fill in signals that are necessarily unblocked for all threads in | |
442 // the VM. Currently, we unblock the following signals: | |
443 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
444 // by -Xrs (=ReduceSignalUsage)); | |
445 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
446 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
447 // the dispositions or masks wrt these signals. | |
448 // Programs embedding the VM that want to use the above signals for their | |
449 // own purposes must, at this time, use the "-Xrs" option to prevent | |
450 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
451 // (See bug 4345157, and other related bugs). | |
452 // In reality, though, unblocking these signals is really a nop, since | |
453 // these signals are not blocked by default. | |
454 sigemptyset(&unblocked_sigs); | |
455 sigemptyset(&allowdebug_blocked_sigs); | |
456 sigaddset(&unblocked_sigs, SIGILL); | |
457 sigaddset(&unblocked_sigs, SIGSEGV); | |
458 sigaddset(&unblocked_sigs, SIGBUS); | |
459 sigaddset(&unblocked_sigs, SIGFPE); | |
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460 #if defined(PPC64) |
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461 sigaddset(&unblocked_sigs, SIGTRAP); |
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462 #endif |
0 | 463 sigaddset(&unblocked_sigs, SR_signum); |
464 | |
465 if (!ReduceSignalUsage) { | |
466 if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
467 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
468 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
469 } | |
470 if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
471 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
472 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
473 } | |
474 if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
475 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
476 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
477 } | |
478 } | |
479 // Fill in signals that are blocked by all but the VM thread. | |
480 sigemptyset(&vm_sigs); | |
481 if (!ReduceSignalUsage) | |
482 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
483 debug_only(signal_sets_initialized = true); | |
484 | |
485 } | |
486 | |
487 // These are signals that are unblocked while a thread is running Java. | |
488 // (For some reason, they get blocked by default.) | |
489 sigset_t* os::Linux::unblocked_signals() { | |
490 assert(signal_sets_initialized, "Not initialized"); | |
491 return &unblocked_sigs; | |
492 } | |
493 | |
494 // These are the signals that are blocked while a (non-VM) thread is | |
495 // running Java. Only the VM thread handles these signals. | |
496 sigset_t* os::Linux::vm_signals() { | |
497 assert(signal_sets_initialized, "Not initialized"); | |
498 return &vm_sigs; | |
499 } | |
500 | |
501 // These are signals that are blocked during cond_wait to allow debugger in | |
502 sigset_t* os::Linux::allowdebug_blocked_signals() { | |
503 assert(signal_sets_initialized, "Not initialized"); | |
504 return &allowdebug_blocked_sigs; | |
505 } | |
506 | |
507 void os::Linux::hotspot_sigmask(Thread* thread) { | |
508 | |
509 //Save caller's signal mask before setting VM signal mask | |
510 sigset_t caller_sigmask; | |
511 pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); | |
512 | |
513 OSThread* osthread = thread->osthread(); | |
514 osthread->set_caller_sigmask(caller_sigmask); | |
515 | |
516 pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL); | |
517 | |
518 if (!ReduceSignalUsage) { | |
519 if (thread->is_VM_thread()) { | |
520 // Only the VM thread handles BREAK_SIGNAL ... | |
521 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); | |
522 } else { | |
523 // ... all other threads block BREAK_SIGNAL | |
524 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); | |
525 } | |
526 } | |
527 } | |
528 | |
529 ////////////////////////////////////////////////////////////////////////////// | |
530 // detecting pthread library | |
531 | |
532 void os::Linux::libpthread_init() { | |
533 // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION | |
534 // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a | |
535 // generic name for earlier versions. | |
536 // Define macros here so we can build HotSpot on old systems. | |
537 # ifndef _CS_GNU_LIBC_VERSION | |
538 # define _CS_GNU_LIBC_VERSION 2 | |
539 # endif | |
540 # ifndef _CS_GNU_LIBPTHREAD_VERSION | |
541 # define _CS_GNU_LIBPTHREAD_VERSION 3 | |
542 # endif | |
543 | |
544 size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0); | |
545 if (n > 0) { | |
6197 | 546 char *str = (char *)malloc(n, mtInternal); |
0 | 547 confstr(_CS_GNU_LIBC_VERSION, str, n); |
548 os::Linux::set_glibc_version(str); | |
549 } else { | |
550 // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() | |
551 static char _gnu_libc_version[32]; | |
552 jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), | |
553 "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); | |
554 os::Linux::set_glibc_version(_gnu_libc_version); | |
555 } | |
556 | |
557 n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0); | |
558 if (n > 0) { | |
6197 | 559 char *str = (char *)malloc(n, mtInternal); |
0 | 560 confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n); |
561 // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells | |
562 // us "NPTL-0.29" even we are running with LinuxThreads. Check if this | |
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563 // is the case. LinuxThreads has a hard limit on max number of threads. |
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564 // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value. |
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565 // On the other hand, NPTL does not have such a limit, sysconf() |
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566 // will return -1 and errno is not changed. Check if it is really NPTL. |
0 | 567 if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 && |
199
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568 strstr(str, "NPTL") && |
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569 sysconf(_SC_THREAD_THREADS_MAX) > 0) { |
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570 free(str); |
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571 os::Linux::set_libpthread_version("linuxthreads"); |
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572 } else { |
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573 os::Linux::set_libpthread_version(str); |
0 | 574 } |
575 } else { | |
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576 // glibc before 2.3.2 only has LinuxThreads. |
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577 os::Linux::set_libpthread_version("linuxthreads"); |
0 | 578 } |
579 | |
580 if (strstr(libpthread_version(), "NPTL")) { | |
581 os::Linux::set_is_NPTL(); | |
582 } else { | |
583 os::Linux::set_is_LinuxThreads(); | |
584 } | |
585 | |
586 // LinuxThreads have two flavors: floating-stack mode, which allows variable | |
587 // stack size; and fixed-stack mode. NPTL is always floating-stack. | |
588 if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) { | |
589 os::Linux::set_is_floating_stack(); | |
590 } | |
591 } | |
592 | |
593 ///////////////////////////////////////////////////////////////////////////// | |
594 // thread stack | |
595 | |
596 // Force Linux kernel to expand current thread stack. If "bottom" is close | |
597 // to the stack guard, caller should block all signals. | |
598 // | |
599 // MAP_GROWSDOWN: | |
600 // A special mmap() flag that is used to implement thread stacks. It tells | |
601 // kernel that the memory region should extend downwards when needed. This | |
602 // allows early versions of LinuxThreads to only mmap the first few pages | |
603 // when creating a new thread. Linux kernel will automatically expand thread | |
604 // stack as needed (on page faults). | |
605 // | |
606 // However, because the memory region of a MAP_GROWSDOWN stack can grow on | |
607 // demand, if a page fault happens outside an already mapped MAP_GROWSDOWN | |
608 // region, it's hard to tell if the fault is due to a legitimate stack | |
609 // access or because of reading/writing non-exist memory (e.g. buffer | |
610 // overrun). As a rule, if the fault happens below current stack pointer, | |
611 // Linux kernel does not expand stack, instead a SIGSEGV is sent to the | |
612 // application (see Linux kernel fault.c). | |
613 // | |
614 // This Linux feature can cause SIGSEGV when VM bangs thread stack for | |
615 // stack overflow detection. | |
616 // | |
617 // Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do | |
618 // not use this flag. However, the stack of initial thread is not created | |
619 // by pthread, it is still MAP_GROWSDOWN. Also it's possible (though | |
620 // unlikely) that user code can create a thread with MAP_GROWSDOWN stack | |
621 // and then attach the thread to JVM. | |
622 // | |
623 // To get around the problem and allow stack banging on Linux, we need to | |
624 // manually expand thread stack after receiving the SIGSEGV. | |
625 // | |
626 // There are two ways to expand thread stack to address "bottom", we used | |
627 // both of them in JVM before 1.5: | |
628 // 1. adjust stack pointer first so that it is below "bottom", and then | |
629 // touch "bottom" | |
630 // 2. mmap() the page in question | |
631 // | |
632 // Now alternate signal stack is gone, it's harder to use 2. For instance, | |
633 // if current sp is already near the lower end of page 101, and we need to | |
634 // call mmap() to map page 100, it is possible that part of the mmap() frame | |
635 // will be placed in page 100. When page 100 is mapped, it is zero-filled. | |
636 // That will destroy the mmap() frame and cause VM to crash. | |
637 // | |
638 // The following code works by adjusting sp first, then accessing the "bottom" | |
639 // page to force a page fault. Linux kernel will then automatically expand the | |
640 // stack mapping. | |
641 // | |
642 // _expand_stack_to() assumes its frame size is less than page size, which | |
643 // should always be true if the function is not inlined. | |
644 | |
645 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute | |
646 #define NOINLINE | |
647 #else | |
648 #define NOINLINE __attribute__ ((noinline)) | |
649 #endif | |
650 | |
651 static void _expand_stack_to(address bottom) NOINLINE; | |
652 | |
653 static void _expand_stack_to(address bottom) { | |
654 address sp; | |
655 size_t size; | |
656 volatile char *p; | |
657 | |
658 // Adjust bottom to point to the largest address within the same page, it | |
659 // gives us a one-page buffer if alloca() allocates slightly more memory. | |
660 bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size()); | |
661 bottom += os::Linux::page_size() - 1; | |
662 | |
663 // sp might be slightly above current stack pointer; if that's the case, we | |
664 // will alloca() a little more space than necessary, which is OK. Don't use | |
665 // os::current_stack_pointer(), as its result can be slightly below current | |
666 // stack pointer, causing us to not alloca enough to reach "bottom". | |
667 sp = (address)&sp; | |
668 | |
669 if (sp > bottom) { | |
670 size = sp - bottom; | |
671 p = (volatile char *)alloca(size); | |
672 assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?"); | |
673 p[0] = '\0'; | |
674 } | |
675 } | |
676 | |
677 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) { | |
678 assert(t!=NULL, "just checking"); | |
679 assert(t->osthread()->expanding_stack(), "expand should be set"); | |
680 assert(t->stack_base() != NULL, "stack_base was not initialized"); | |
681 | |
682 if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) { | |
683 sigset_t mask_all, old_sigset; | |
684 sigfillset(&mask_all); | |
685 pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset); | |
686 _expand_stack_to(addr); | |
687 pthread_sigmask(SIG_SETMASK, &old_sigset, NULL); | |
688 return true; | |
689 } | |
690 return false; | |
691 } | |
692 | |
693 ////////////////////////////////////////////////////////////////////////////// | |
694 // create new thread | |
695 | |
696 static address highest_vm_reserved_address(); | |
697 | |
698 // check if it's safe to start a new thread | |
699 static bool _thread_safety_check(Thread* thread) { | |
700 if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) { | |
701 // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat) | |
702 // Heap is mmap'ed at lower end of memory space. Thread stacks are | |
703 // allocated (MAP_FIXED) from high address space. Every thread stack | |
704 // occupies a fixed size slot (usually 2Mbytes, but user can change | |
705 // it to other values if they rebuild LinuxThreads). | |
706 // | |
707 // Problem with MAP_FIXED is that mmap() can still succeed even part of | |
708 // the memory region has already been mmap'ed. That means if we have too | |
709 // many threads and/or very large heap, eventually thread stack will | |
710 // collide with heap. | |
711 // | |
712 // Here we try to prevent heap/stack collision by comparing current | |
713 // stack bottom with the highest address that has been mmap'ed by JVM | |
714 // plus a safety margin for memory maps created by native code. | |
715 // | |
716 // This feature can be disabled by setting ThreadSafetyMargin to 0 | |
717 // | |
718 if (ThreadSafetyMargin > 0) { | |
719 address stack_bottom = os::current_stack_base() - os::current_stack_size(); | |
720 | |
721 // not safe if our stack extends below the safety margin | |
722 return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address(); | |
723 } else { | |
724 return true; | |
725 } | |
726 } else { | |
727 // Floating stack LinuxThreads or NPTL: | |
728 // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When | |
729 // there's not enough space left, pthread_create() will fail. If we come | |
730 // here, that means enough space has been reserved for stack. | |
731 return true; | |
732 } | |
733 } | |
734 | |
735 // Thread start routine for all newly created threads | |
736 static void *java_start(Thread *thread) { | |
737 // Try to randomize the cache line index of hot stack frames. | |
738 // This helps when threads of the same stack traces evict each other's | |
739 // cache lines. The threads can be either from the same JVM instance, or | |
740 // from different JVM instances. The benefit is especially true for | |
741 // processors with hyperthreading technology. | |
742 static int counter = 0; | |
743 int pid = os::current_process_id(); | |
744 alloca(((pid ^ counter++) & 7) * 128); | |
745 | |
746 ThreadLocalStorage::set_thread(thread); | |
747 | |
748 OSThread* osthread = thread->osthread(); | |
749 Monitor* sync = osthread->startThread_lock(); | |
750 | |
751 // non floating stack LinuxThreads needs extra check, see above | |
752 if (!_thread_safety_check(thread)) { | |
753 // notify parent thread | |
754 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
755 osthread->set_state(ZOMBIE); | |
756 sync->notify_all(); | |
757 return NULL; | |
758 } | |
759 | |
760 // thread_id is kernel thread id (similar to Solaris LWP id) | |
761 osthread->set_thread_id(os::Linux::gettid()); | |
762 | |
763 if (UseNUMA) { | |
764 int lgrp_id = os::numa_get_group_id(); | |
765 if (lgrp_id != -1) { | |
766 thread->set_lgrp_id(lgrp_id); | |
767 } | |
768 } | |
769 // initialize signal mask for this thread | |
770 os::Linux::hotspot_sigmask(thread); | |
771 | |
772 // initialize floating point control register | |
773 os::Linux::init_thread_fpu_state(); | |
774 | |
775 // handshaking with parent thread | |
776 { | |
777 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
778 | |
779 // notify parent thread | |
780 osthread->set_state(INITIALIZED); | |
781 sync->notify_all(); | |
782 | |
783 // wait until os::start_thread() | |
784 while (osthread->get_state() == INITIALIZED) { | |
785 sync->wait(Mutex::_no_safepoint_check_flag); | |
786 } | |
787 } | |
788 | |
789 // call one more level start routine | |
790 thread->run(); | |
791 | |
792 return 0; | |
793 } | |
794 | |
795 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
796 assert(thread->osthread() == NULL, "caller responsible"); | |
797 | |
798 // Allocate the OSThread object | |
799 OSThread* osthread = new OSThread(NULL, NULL); | |
800 if (osthread == NULL) { | |
801 return false; | |
802 } | |
803 | |
804 // set the correct thread state | |
805 osthread->set_thread_type(thr_type); | |
806 | |
807 // Initial state is ALLOCATED but not INITIALIZED | |
808 osthread->set_state(ALLOCATED); | |
809 | |
810 thread->set_osthread(osthread); | |
811 | |
812 // init thread attributes | |
813 pthread_attr_t attr; | |
814 pthread_attr_init(&attr); | |
815 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
816 | |
817 // stack size | |
818 if (os::Linux::supports_variable_stack_size()) { | |
819 // calculate stack size if it's not specified by caller | |
820 if (stack_size == 0) { | |
821 stack_size = os::Linux::default_stack_size(thr_type); | |
822 | |
823 switch (thr_type) { | |
824 case os::java_thread: | |
1867
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825 // Java threads use ThreadStackSize which default value can be |
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826 // changed with the flag -Xss |
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827 assert (JavaThread::stack_size_at_create() > 0, "this should be set"); |
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828 stack_size = JavaThread::stack_size_at_create(); |
0 | 829 break; |
830 case os::compiler_thread: | |
831 if (CompilerThreadStackSize > 0) { | |
832 stack_size = (size_t)(CompilerThreadStackSize * K); | |
833 break; | |
834 } // else fall through: | |
835 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
836 case os::vm_thread: | |
837 case os::pgc_thread: | |
838 case os::cgc_thread: | |
839 case os::watcher_thread: | |
840 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
841 break; | |
842 } | |
843 } | |
844 | |
845 stack_size = MAX2(stack_size, os::Linux::min_stack_allowed); | |
846 pthread_attr_setstacksize(&attr, stack_size); | |
847 } else { | |
848 // let pthread_create() pick the default value. | |
849 } | |
850 | |
851 // glibc guard page | |
852 pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type)); | |
853 | |
854 ThreadState state; | |
855 | |
856 { | |
857 // Serialize thread creation if we are running with fixed stack LinuxThreads | |
858 bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack(); | |
859 if (lock) { | |
860 os::Linux::createThread_lock()->lock_without_safepoint_check(); | |
861 } | |
862 | |
863 pthread_t tid; | |
864 int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); | |
865 | |
866 pthread_attr_destroy(&attr); | |
867 | |
868 if (ret != 0) { | |
869 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
870 perror("pthread_create()"); | |
871 } | |
872 // Need to clean up stuff we've allocated so far | |
873 thread->set_osthread(NULL); | |
874 delete osthread; | |
875 if (lock) os::Linux::createThread_lock()->unlock(); | |
876 return false; | |
877 } | |
878 | |
879 // Store pthread info into the OSThread | |
880 osthread->set_pthread_id(tid); | |
881 | |
882 // Wait until child thread is either initialized or aborted | |
883 { | |
884 Monitor* sync_with_child = osthread->startThread_lock(); | |
885 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
886 while ((state = osthread->get_state()) == ALLOCATED) { | |
887 sync_with_child->wait(Mutex::_no_safepoint_check_flag); | |
888 } | |
889 } | |
890 | |
891 if (lock) { | |
892 os::Linux::createThread_lock()->unlock(); | |
893 } | |
894 } | |
895 | |
896 // Aborted due to thread limit being reached | |
897 if (state == ZOMBIE) { | |
898 thread->set_osthread(NULL); | |
899 delete osthread; | |
900 return false; | |
901 } | |
902 | |
903 // The thread is returned suspended (in state INITIALIZED), | |
904 // and is started higher up in the call chain | |
905 assert(state == INITIALIZED, "race condition"); | |
906 return true; | |
907 } | |
908 | |
909 ///////////////////////////////////////////////////////////////////////////// | |
910 // attach existing thread | |
911 | |
912 // bootstrap the main thread | |
913 bool os::create_main_thread(JavaThread* thread) { | |
914 assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread"); | |
915 return create_attached_thread(thread); | |
916 } | |
917 | |
918 bool os::create_attached_thread(JavaThread* thread) { | |
919 #ifdef ASSERT | |
920 thread->verify_not_published(); | |
921 #endif | |
922 | |
923 // Allocate the OSThread object | |
924 OSThread* osthread = new OSThread(NULL, NULL); | |
925 | |
926 if (osthread == NULL) { | |
927 return false; | |
928 } | |
929 | |
930 // Store pthread info into the OSThread | |
931 osthread->set_thread_id(os::Linux::gettid()); | |
932 osthread->set_pthread_id(::pthread_self()); | |
933 | |
934 // initialize floating point control register | |
935 os::Linux::init_thread_fpu_state(); | |
936 | |
937 // Initial thread state is RUNNABLE | |
938 osthread->set_state(RUNNABLE); | |
939 | |
940 thread->set_osthread(osthread); | |
941 | |
942 if (UseNUMA) { | |
943 int lgrp_id = os::numa_get_group_id(); | |
944 if (lgrp_id != -1) { | |
945 thread->set_lgrp_id(lgrp_id); | |
946 } | |
947 } | |
948 | |
949 if (os::Linux::is_initial_thread()) { | |
950 // If current thread is initial thread, its stack is mapped on demand, | |
951 // see notes about MAP_GROWSDOWN. Here we try to force kernel to map | |
952 // the entire stack region to avoid SEGV in stack banging. | |
953 // It is also useful to get around the heap-stack-gap problem on SuSE | |
954 // kernel (see 4821821 for details). We first expand stack to the top | |
955 // of yellow zone, then enable stack yellow zone (order is significant, | |
956 // enabling yellow zone first will crash JVM on SuSE Linux), so there | |
957 // is no gap between the last two virtual memory regions. | |
958 | |
959 JavaThread *jt = (JavaThread *)thread; | |
960 address addr = jt->stack_yellow_zone_base(); | |
961 assert(addr != NULL, "initialization problem?"); | |
962 assert(jt->stack_available(addr) > 0, "stack guard should not be enabled"); | |
963 | |
964 osthread->set_expanding_stack(); | |
965 os::Linux::manually_expand_stack(jt, addr); | |
966 osthread->clear_expanding_stack(); | |
967 } | |
968 | |
969 // initialize signal mask for this thread | |
970 // and save the caller's signal mask | |
971 os::Linux::hotspot_sigmask(thread); | |
972 | |
973 return true; | |
974 } | |
975 | |
976 void os::pd_start_thread(Thread* thread) { | |
977 OSThread * osthread = thread->osthread(); | |
978 assert(osthread->get_state() != INITIALIZED, "just checking"); | |
979 Monitor* sync_with_child = osthread->startThread_lock(); | |
980 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
981 sync_with_child->notify(); | |
982 } | |
983 | |
984 // Free Linux resources related to the OSThread | |
985 void os::free_thread(OSThread* osthread) { | |
986 assert(osthread != NULL, "osthread not set"); | |
987 | |
988 if (Thread::current()->osthread() == osthread) { | |
989 // Restore caller's signal mask | |
990 sigset_t sigmask = osthread->caller_sigmask(); | |
991 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); | |
992 } | |
993 | |
994 delete osthread; | |
995 } | |
996 | |
997 ////////////////////////////////////////////////////////////////////////////// | |
998 // thread local storage | |
999 | |
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1000 // Restore the thread pointer if the destructor is called. This is in case |
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1001 // someone from JNI code sets up a destructor with pthread_key_create to run |
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1002 // detachCurrentThread on thread death. Unless we restore the thread pointer we |
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1003 // will hang or crash. When detachCurrentThread is called the key will be set |
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1004 // to null and we will not be called again. If detachCurrentThread is never |
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1005 // called we could loop forever depending on the pthread implementation. |
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1006 static void restore_thread_pointer(void* p) { |
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1007 Thread* thread = (Thread*) p; |
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1008 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); |
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1009 } |
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1010 |
0 | 1011 int os::allocate_thread_local_storage() { |
1012 pthread_key_t key; | |
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1013 int rslt = pthread_key_create(&key, restore_thread_pointer); |
0 | 1014 assert(rslt == 0, "cannot allocate thread local storage"); |
1015 return (int)key; | |
1016 } | |
1017 | |
1018 // Note: This is currently not used by VM, as we don't destroy TLS key | |
1019 // on VM exit. | |
1020 void os::free_thread_local_storage(int index) { | |
1021 int rslt = pthread_key_delete((pthread_key_t)index); | |
1022 assert(rslt == 0, "invalid index"); | |
1023 } | |
1024 | |
1025 void os::thread_local_storage_at_put(int index, void* value) { | |
1026 int rslt = pthread_setspecific((pthread_key_t)index, value); | |
1027 assert(rslt == 0, "pthread_setspecific failed"); | |
1028 } | |
1029 | |
1030 extern "C" Thread* get_thread() { | |
1031 return ThreadLocalStorage::thread(); | |
1032 } | |
1033 | |
1034 ////////////////////////////////////////////////////////////////////////////// | |
1035 // initial thread | |
1036 | |
1037 // Check if current thread is the initial thread, similar to Solaris thr_main. | |
1038 bool os::Linux::is_initial_thread(void) { | |
1039 char dummy; | |
1040 // If called before init complete, thread stack bottom will be null. | |
1041 // Can be called if fatal error occurs before initialization. | |
1042 if (initial_thread_stack_bottom() == NULL) return false; | |
1043 assert(initial_thread_stack_bottom() != NULL && | |
1044 initial_thread_stack_size() != 0, | |
1045 "os::init did not locate initial thread's stack region"); | |
1046 if ((address)&dummy >= initial_thread_stack_bottom() && | |
1047 (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size()) | |
1048 return true; | |
1049 else return false; | |
1050 } | |
1051 | |
1052 // Find the virtual memory area that contains addr | |
1053 static bool find_vma(address addr, address* vma_low, address* vma_high) { | |
1054 FILE *fp = fopen("/proc/self/maps", "r"); | |
1055 if (fp) { | |
1056 address low, high; | |
1057 while (!feof(fp)) { | |
1058 if (fscanf(fp, "%p-%p", &low, &high) == 2) { | |
1059 if (low <= addr && addr < high) { | |
1060 if (vma_low) *vma_low = low; | |
1061 if (vma_high) *vma_high = high; | |
1062 fclose (fp); | |
1063 return true; | |
1064 } | |
1065 } | |
1066 for (;;) { | |
1067 int ch = fgetc(fp); | |
1068 if (ch == EOF || ch == (int)'\n') break; | |
1069 } | |
1070 } | |
1071 fclose(fp); | |
1072 } | |
1073 return false; | |
1074 } | |
1075 | |
1076 // Locate initial thread stack. This special handling of initial thread stack | |
1077 // is needed because pthread_getattr_np() on most (all?) Linux distros returns | |
24179 | 1078 // bogus value for the primordial process thread. While the launcher has created |
1079 // the VM in a new thread since JDK 6, we still have to allow for the use of the | |
1080 // JNI invocation API from a primordial thread. | |
0 | 1081 void os::Linux::capture_initial_stack(size_t max_size) { |
24179 | 1082 |
1083 // max_size is either 0 (which means accept OS default for thread stacks) or | |
1084 // a user-specified value known to be at least the minimum needed. If we | |
1085 // are actually on the primordial thread we can make it appear that we have a | |
1086 // smaller max_size stack by inserting the guard pages at that location. But we | |
1087 // cannot do anything to emulate a larger stack than what has been provided by | |
1088 // the OS or threading library. In fact if we try to use a stack greater than | |
1089 // what is set by rlimit then we will crash the hosting process. | |
1090 | |
1091 // Maximum stack size is the easy part, get it from RLIMIT_STACK. | |
1092 // If this is "unlimited" then it will be a huge value. | |
0 | 1093 struct rlimit rlim; |
1094 getrlimit(RLIMIT_STACK, &rlim); | |
24179 | 1095 size_t stack_size = rlim.rlim_cur; |
0 | 1096 |
1097 // 6308388: a bug in ld.so will relocate its own .data section to the | |
1098 // lower end of primordial stack; reduce ulimit -s value a little bit | |
1099 // so we won't install guard page on ld.so's data section. | |
1100 stack_size -= 2 * page_size(); | |
1101 | |
1102 // Try to figure out where the stack base (top) is. This is harder. | |
1103 // | |
1104 // When an application is started, glibc saves the initial stack pointer in | |
1105 // a global variable "__libc_stack_end", which is then used by system | |
1106 // libraries. __libc_stack_end should be pretty close to stack top. The | |
1107 // variable is available since the very early days. However, because it is | |
1108 // a private interface, it could disappear in the future. | |
1109 // | |
1110 // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar | |
1111 // to __libc_stack_end, it is very close to stack top, but isn't the real | |
1112 // stack top. Note that /proc may not exist if VM is running as a chroot | |
1113 // program, so reading /proc/<pid>/stat could fail. Also the contents of | |
1114 // /proc/<pid>/stat could change in the future (though unlikely). | |
1115 // | |
1116 // We try __libc_stack_end first. If that doesn't work, look for | |
1117 // /proc/<pid>/stat. If neither of them works, we use current stack pointer | |
1118 // as a hint, which should work well in most cases. | |
1119 | |
1120 uintptr_t stack_start; | |
1121 | |
1122 // try __libc_stack_end first | |
1123 uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end"); | |
1124 if (p && *p) { | |
1125 stack_start = *p; | |
1126 } else { | |
1127 // see if we can get the start_stack field from /proc/self/stat | |
1128 FILE *fp; | |
1129 int pid; | |
1130 char state; | |
1131 int ppid; | |
1132 int pgrp; | |
1133 int session; | |
1134 int nr; | |
1135 int tpgrp; | |
1136 unsigned long flags; | |
1137 unsigned long minflt; | |
1138 unsigned long cminflt; | |
1139 unsigned long majflt; | |
1140 unsigned long cmajflt; | |
1141 unsigned long utime; | |
1142 unsigned long stime; | |
1143 long cutime; | |
1144 long cstime; | |
1145 long prio; | |
1146 long nice; | |
1147 long junk; | |
1148 long it_real; | |
1149 uintptr_t start; | |
1150 uintptr_t vsize; | |
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1151 intptr_t rss; |
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1152 uintptr_t rsslim; |
0 | 1153 uintptr_t scodes; |
1154 uintptr_t ecode; | |
1155 int i; | |
1156 | |
1157 // Figure what the primordial thread stack base is. Code is inspired | |
1158 // by email from Hans Boehm. /proc/self/stat begins with current pid, | |
1159 // followed by command name surrounded by parentheses, state, etc. | |
1160 char stat[2048]; | |
1161 int statlen; | |
1162 | |
1163 fp = fopen("/proc/self/stat", "r"); | |
1164 if (fp) { | |
1165 statlen = fread(stat, 1, 2047, fp); | |
1166 stat[statlen] = '\0'; | |
1167 fclose(fp); | |
1168 | |
1169 // Skip pid and the command string. Note that we could be dealing with | |
1170 // weird command names, e.g. user could decide to rename java launcher | |
1171 // to "java 1.4.2 :)", then the stat file would look like | |
1172 // 1234 (java 1.4.2 :)) R ... ... | |
1173 // We don't really need to know the command string, just find the last | |
1174 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
1175 char * s = strrchr(stat, ')'); | |
1176 | |
1177 i = 0; | |
1178 if (s) { | |
1179 // Skip blank chars | |
1180 do s++; while (isspace(*s)); | |
1181 | |
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1182 #define _UFM UINTX_FORMAT |
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1183 #define _DFM INTX_FORMAT |
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1184 |
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1185 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 */ |
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1186 /* 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 */ |
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1187 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 | 1188 &state, /* 3 %c */ |
1189 &ppid, /* 4 %d */ | |
1190 &pgrp, /* 5 %d */ | |
1191 &session, /* 6 %d */ | |
1192 &nr, /* 7 %d */ | |
1193 &tpgrp, /* 8 %d */ | |
1194 &flags, /* 9 %lu */ | |
1195 &minflt, /* 10 %lu */ | |
1196 &cminflt, /* 11 %lu */ | |
1197 &majflt, /* 12 %lu */ | |
1198 &cmajflt, /* 13 %lu */ | |
1199 &utime, /* 14 %lu */ | |
1200 &stime, /* 15 %lu */ | |
1201 &cutime, /* 16 %ld */ | |
1202 &cstime, /* 17 %ld */ | |
1203 &prio, /* 18 %ld */ | |
1204 &nice, /* 19 %ld */ | |
1205 &junk, /* 20 %ld */ | |
1206 &it_real, /* 21 %ld */ | |
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1207 &start, /* 22 UINTX_FORMAT */ |
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1208 &vsize, /* 23 UINTX_FORMAT */ |
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1209 &rss, /* 24 INTX_FORMAT */ |
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1210 &rsslim, /* 25 UINTX_FORMAT */ |
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1211 &scodes, /* 26 UINTX_FORMAT */ |
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1212 &ecode, /* 27 UINTX_FORMAT */ |
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1213 &stack_start); /* 28 UINTX_FORMAT */ |
0 | 1214 } |
1215 | |
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1216 #undef _UFM |
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1217 #undef _DFM |
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1218 |
0 | 1219 if (i != 28 - 2) { |
1220 assert(false, "Bad conversion from /proc/self/stat"); | |
1221 // product mode - assume we are the initial thread, good luck in the | |
1222 // embedded case. | |
1223 warning("Can't detect initial thread stack location - bad conversion"); | |
1224 stack_start = (uintptr_t) &rlim; | |
1225 } | |
1226 } else { | |
1227 // For some reason we can't open /proc/self/stat (for example, running on | |
1228 // FreeBSD with a Linux emulator, or inside chroot), this should work for | |
1229 // most cases, so don't abort: | |
1230 warning("Can't detect initial thread stack location - no /proc/self/stat"); | |
1231 stack_start = (uintptr_t) &rlim; | |
1232 } | |
1233 } | |
1234 | |
1235 // Now we have a pointer (stack_start) very close to the stack top, the | |
1236 // next thing to do is to figure out the exact location of stack top. We | |
1237 // can find out the virtual memory area that contains stack_start by | |
1238 // reading /proc/self/maps, it should be the last vma in /proc/self/maps, | |
1239 // and its upper limit is the real stack top. (again, this would fail if | |
1240 // running inside chroot, because /proc may not exist.) | |
1241 | |
1242 uintptr_t stack_top; | |
1243 address low, high; | |
1244 if (find_vma((address)stack_start, &low, &high)) { | |
1245 // success, "high" is the true stack top. (ignore "low", because initial | |
1246 // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.) | |
1247 stack_top = (uintptr_t)high; | |
1248 } else { | |
1249 // failed, likely because /proc/self/maps does not exist | |
1250 warning("Can't detect initial thread stack location - find_vma failed"); | |
1251 // best effort: stack_start is normally within a few pages below the real | |
1252 // stack top, use it as stack top, and reduce stack size so we won't put | |
1253 // guard page outside stack. | |
1254 stack_top = stack_start; | |
1255 stack_size -= 16 * page_size(); | |
1256 } | |
1257 | |
1258 // stack_top could be partially down the page so align it | |
1259 stack_top = align_size_up(stack_top, page_size()); | |
1260 | |
24179 | 1261 // Allowed stack value is minimum of max_size and what we derived from rlimit |
1262 if (max_size > 0) { | |
1263 _initial_thread_stack_size = MIN2(max_size, stack_size); | |
0 | 1264 } else { |
24179 | 1265 // Accept the rlimit max, but if stack is unlimited then it will be huge, so |
1266 // clamp it at 8MB as we do on Solaris | |
1267 _initial_thread_stack_size = MIN2(stack_size, 8*M); | |
0 | 1268 } |
1269 | |
1270 _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size()); | |
1271 _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size; | |
24179 | 1272 assert(_initial_thread_stack_bottom < (address)stack_top, "overflow!"); |
0 | 1273 } |
1274 | |
1275 //////////////////////////////////////////////////////////////////////////////// | |
1276 // time support | |
1277 | |
1278 // Time since start-up in seconds to a fine granularity. | |
1279 // Used by VMSelfDestructTimer and the MemProfiler. | |
1280 double os::elapsedTime() { | |
1281 | |
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1282 return ((double)os::elapsed_counter()) / os::elapsed_frequency(); // nanosecond resolution |
0 | 1283 } |
1284 | |
1285 jlong os::elapsed_counter() { | |
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1286 return javaTimeNanos() - initial_time_count; |
0 | 1287 } |
1288 | |
1289 jlong os::elapsed_frequency() { | |
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1290 return NANOSECS_PER_SEC; // nanosecond resolution |
0 | 1291 } |
1292 | |
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1293 bool os::supports_vtime() { return true; } |
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1294 bool os::enable_vtime() { return false; } |
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1295 bool os::vtime_enabled() { return false; } |
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1296 |
342
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1297 double os::elapsedVTime() { |
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1298 struct rusage usage; |
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1299 int retval = getrusage(RUSAGE_THREAD, &usage); |
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1300 if (retval == 0) { |
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1301 return (double) (usage.ru_utime.tv_sec + usage.ru_stime.tv_sec) + (double) (usage.ru_utime.tv_usec + usage.ru_stime.tv_usec) / (1000 * 1000); |
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1302 } else { |
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1303 // better than nothing, but not much |
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1304 return elapsedTime(); |
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1305 } |
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1306 } |
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1307 |
61 | 1308 jlong os::javaTimeMillis() { |
0 | 1309 timeval time; |
1310 int status = gettimeofday(&time, NULL); | |
1311 assert(status != -1, "linux error"); | |
1312 return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); | |
1313 } | |
1314 | |
1315 #ifndef CLOCK_MONOTONIC | |
1316 #define CLOCK_MONOTONIC (1) | |
1317 #endif | |
1318 | |
1319 void os::Linux::clock_init() { | |
1320 // we do dlopen's in this particular order due to bug in linux | |
1321 // dynamical loader (see 6348968) leading to crash on exit | |
1322 void* handle = dlopen("librt.so.1", RTLD_LAZY); | |
1323 if (handle == NULL) { | |
1324 handle = dlopen("librt.so", RTLD_LAZY); | |
1325 } | |
1326 | |
1327 if (handle) { | |
1328 int (*clock_getres_func)(clockid_t, struct timespec*) = | |
1329 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres"); | |
1330 int (*clock_gettime_func)(clockid_t, struct timespec*) = | |
1331 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime"); | |
1332 if (clock_getres_func && clock_gettime_func) { | |
1333 // See if monotonic clock is supported by the kernel. Note that some | |
1334 // early implementations simply return kernel jiffies (updated every | |
1335 // 1/100 or 1/1000 second). It would be bad to use such a low res clock | |
1336 // for nano time (though the monotonic property is still nice to have). | |
1337 // It's fixed in newer kernels, however clock_getres() still returns | |
1338 // 1/HZ. We check if clock_getres() works, but will ignore its reported | |
1339 // resolution for now. Hopefully as people move to new kernels, this | |
1340 // won't be a problem. | |
1341 struct timespec res; | |
1342 struct timespec tp; | |
1343 if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 && | |
1344 clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) { | |
1345 // yes, monotonic clock is supported | |
1346 _clock_gettime = clock_gettime_func; | |
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1347 return; |
0 | 1348 } else { |
1349 // close librt if there is no monotonic clock | |
1350 dlclose(handle); | |
1351 } | |
1352 } | |
1353 } | |
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1354 warning("No monotonic clock was available - timed services may " \ |
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1355 "be adversely affected if the time-of-day clock changes"); |
0 | 1356 } |
1357 | |
1358 #ifndef SYS_clock_getres | |
1359 | |
1360 #if defined(IA32) || defined(AMD64) | |
1361 #define SYS_clock_getres IA32_ONLY(266) AMD64_ONLY(229) | |
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1362 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
0 | 1363 #else |
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1364 #warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time" |
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1365 #define sys_clock_getres(x,y) -1 |
0 | 1366 #endif |
1367 | |
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1368 #else |
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1369 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
0 | 1370 #endif |
1371 | |
1372 void os::Linux::fast_thread_clock_init() { | |
1373 if (!UseLinuxPosixThreadCPUClocks) { | |
1374 return; | |
1375 } | |
1376 clockid_t clockid; | |
1377 struct timespec tp; | |
1378 int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) = | |
1379 (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid"); | |
1380 | |
1381 // Switch to using fast clocks for thread cpu time if | |
1382 // the sys_clock_getres() returns 0 error code. | |
1383 // Note, that some kernels may support the current thread | |
1384 // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks | |
1385 // returned by the pthread_getcpuclockid(). | |
1386 // If the fast Posix clocks are supported then the sys_clock_getres() | |
1387 // must return at least tp.tv_sec == 0 which means a resolution | |
1388 // better than 1 sec. This is extra check for reliability. | |
1389 | |
1390 if(pthread_getcpuclockid_func && | |
1391 pthread_getcpuclockid_func(_main_thread, &clockid) == 0 && | |
1392 sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) { | |
1393 | |
1394 _supports_fast_thread_cpu_time = true; | |
1395 _pthread_getcpuclockid = pthread_getcpuclockid_func; | |
1396 } | |
1397 } | |
1398 | |
1399 jlong os::javaTimeNanos() { | |
1400 if (Linux::supports_monotonic_clock()) { | |
1401 struct timespec tp; | |
1402 int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp); | |
1403 assert(status == 0, "gettime error"); | |
1404 jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); | |
1405 return result; | |
1406 } else { | |
1407 timeval time; | |
1408 int status = gettimeofday(&time, NULL); | |
1409 assert(status != -1, "linux error"); | |
1410 jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); | |
1411 return 1000 * usecs; | |
1412 } | |
1413 } | |
1414 | |
1415 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
1416 if (Linux::supports_monotonic_clock()) { | |
1417 info_ptr->max_value = ALL_64_BITS; | |
1418 | |
1419 // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past | |
1420 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
1421 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
1422 } else { | |
1423 // gettimeofday - based on time in seconds since the Epoch thus does not wrap | |
1424 info_ptr->max_value = ALL_64_BITS; | |
1425 | |
1426 // gettimeofday is a real time clock so it skips | |
1427 info_ptr->may_skip_backward = true; | |
1428 info_ptr->may_skip_forward = true; | |
1429 } | |
1430 | |
1431 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
1432 } | |
1433 | |
1434 // Return the real, user, and system times in seconds from an | |
1435 // arbitrary fixed point in the past. | |
1436 bool os::getTimesSecs(double* process_real_time, | |
1437 double* process_user_time, | |
1438 double* process_system_time) { | |
1439 struct tms ticks; | |
1440 clock_t real_ticks = times(&ticks); | |
1441 | |
1442 if (real_ticks == (clock_t) (-1)) { | |
1443 return false; | |
1444 } else { | |
1445 double ticks_per_second = (double) clock_tics_per_sec; | |
1446 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
1447 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
1448 *process_real_time = ((double) real_ticks) / ticks_per_second; | |
1449 | |
1450 return true; | |
1451 } | |
1452 } | |
1453 | |
1454 | |
1455 char * os::local_time_string(char *buf, size_t buflen) { | |
1456 struct tm t; | |
1457 time_t long_time; | |
1458 time(&long_time); | |
1459 localtime_r(&long_time, &t); | |
1460 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
1461 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
1462 t.tm_hour, t.tm_min, t.tm_sec); | |
1463 return buf; | |
1464 } | |
1465 | |
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1466 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
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1467 return localtime_r(clock, res); |
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|
1468 } |
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|
1469 |
0 | 1470 //////////////////////////////////////////////////////////////////////////////// |
1471 // runtime exit support | |
1472 | |
1473 // Note: os::shutdown() might be called very early during initialization, or | |
1474 // called from signal handler. Before adding something to os::shutdown(), make | |
1475 // sure it is async-safe and can handle partially initialized VM. | |
1476 void os::shutdown() { | |
1477 | |
1478 // allow PerfMemory to attempt cleanup of any persistent resources | |
1479 perfMemory_exit(); | |
1480 | |
1481 // needs to remove object in file system | |
1482 AttachListener::abort(); | |
1483 | |
1484 // flush buffered output, finish log files | |
1485 ostream_abort(); | |
1486 | |
1487 // Check for abort hook | |
1488 abort_hook_t abort_hook = Arguments::abort_hook(); | |
1489 if (abort_hook != NULL) { | |
1490 abort_hook(); | |
1491 } | |
1492 | |
1493 } | |
1494 | |
1495 // Note: os::abort() might be called very early during initialization, or | |
1496 // called from signal handler. Before adding something to os::abort(), make | |
1497 // sure it is async-safe and can handle partially initialized VM. | |
1498 void os::abort(bool dump_core) { | |
1499 os::shutdown(); | |
1500 if (dump_core) { | |
1501 #ifndef PRODUCT | |
1502 fdStream out(defaultStream::output_fd()); | |
1503 out.print_raw("Current thread is "); | |
1504 char buf[16]; | |
1505 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
1506 out.print_raw_cr(buf); | |
1507 out.print_raw_cr("Dumping core ..."); | |
1508 #endif | |
1509 ::abort(); // dump core | |
1510 } | |
1511 | |
1512 ::exit(1); | |
1513 } | |
1514 | |
1515 // Die immediately, no exit hook, no abort hook, no cleanup. | |
1516 void os::die() { | |
1517 // _exit() on LinuxThreads only kills current thread | |
1518 ::abort(); | |
1519 } | |
1520 | |
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1521 |
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|
1522 // This method is a copy of JDK's sysGetLastErrorString |
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1523 // from src/solaris/hpi/src/system_md.c |
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1524 |
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|
1525 size_t os::lasterror(char *buf, size_t len) { |
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|
1526 |
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|
1527 if (errno == 0) return 0; |
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|
1528 |
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|
1529 const char *s = ::strerror(errno); |
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|
1530 size_t n = ::strlen(s); |
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|
1531 if (n >= len) { |
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|
1532 n = len - 1; |
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|
1533 } |
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|
1534 ::strncpy(buf, s, n); |
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|
1535 buf[n] = '\0'; |
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|
1536 return n; |
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|
1537 } |
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|
1538 |
0 | 1539 intx os::current_thread_id() { return (intx)pthread_self(); } |
1540 int os::current_process_id() { | |
1541 | |
1542 // Under the old linux thread library, linux gives each thread | |
1543 // its own process id. Because of this each thread will return | |
1544 // a different pid if this method were to return the result | |
1545 // of getpid(2). Linux provides no api that returns the pid | |
1546 // of the launcher thread for the vm. This implementation | |
1547 // returns a unique pid, the pid of the launcher thread | |
1548 // that starts the vm 'process'. | |
1549 | |
1550 // Under the NPTL, getpid() returns the same pid as the | |
1551 // launcher thread rather than a unique pid per thread. | |
1552 // Use gettid() if you want the old pre NPTL behaviour. | |
1553 | |
1554 // if you are looking for the result of a call to getpid() that | |
1555 // returns a unique pid for the calling thread, then look at the | |
1556 // OSThread::thread_id() method in osThread_linux.hpp file | |
1557 | |
1558 return (int)(_initial_pid ? _initial_pid : getpid()); | |
1559 } | |
1560 | |
1561 // DLL functions | |
1562 | |
1563 const char* os::dll_file_extension() { return ".so"; } | |
1564 | |
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1565 // This must be hard coded because it's the system's temporary |
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1566 // directory not the java application's temp directory, ala java.io.tmpdir. |
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|
1567 const char* os::get_temp_directory() { return "/tmp"; } |
0 | 1568 |
691 | 1569 static bool file_exists(const char* filename) { |
1570 struct stat statbuf; | |
1571 if (filename == NULL || strlen(filename) == 0) { | |
1572 return false; | |
1573 } | |
1574 return os::stat(filename, &statbuf) == 0; | |
1575 } | |
1576 | |
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|
1577 bool os::dll_build_name(char* buffer, size_t buflen, |
691 | 1578 const char* pname, const char* fname) { |
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1579 bool retval = false; |
691 | 1580 // Copied from libhpi |
242 | 1581 const size_t pnamelen = pname ? strlen(pname) : 0; |
1582 | |
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1583 // Return error on buffer overflow. |
242 | 1584 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
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|
1585 return retval; |
242 | 1586 } |
1587 | |
1588 if (pnamelen == 0) { | |
691 | 1589 snprintf(buffer, buflen, "lib%s.so", fname); |
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|
1590 retval = true; |
691 | 1591 } else if (strchr(pname, *os::path_separator()) != NULL) { |
1592 int n; | |
1593 char** pelements = split_path(pname, &n); | |
9059
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|
1594 if (pelements == NULL) { |
9062 | 1595 return false; |
9059
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|
1596 } |
691 | 1597 for (int i = 0 ; i < n ; i++) { |
1598 // Really shouldn't be NULL, but check can't hurt | |
1599 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
1600 continue; // skip the empty path values | |
1601 } | |
1602 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
1603 if (file_exists(buffer)) { | |
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|
1604 retval = true; |
691 | 1605 break; |
1606 } | |
1607 } | |
1608 // release the storage | |
1609 for (int i = 0 ; i < n ; i++) { | |
1610 if (pelements[i] != NULL) { | |
6197 | 1611 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
691 | 1612 } |
1613 } | |
1614 if (pelements != NULL) { | |
6197 | 1615 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
691 | 1616 } |
242 | 1617 } else { |
691 | 1618 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
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|
1619 retval = true; |
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|
1620 } |
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|
1621 return retval; |
242 | 1622 } |
1623 | |
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7d42f3b08300
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|
1624 // check if addr is inside libjvm.so |
0 | 1625 bool os::address_is_in_vm(address addr) { |
1626 static address libjvm_base_addr; | |
1627 Dl_info dlinfo; | |
1628 | |
1629 if (libjvm_base_addr == NULL) { | |
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|
1630 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
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|
1631 libjvm_base_addr = (address)dlinfo.dli_fbase; |
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|
1632 } |
0 | 1633 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
1634 } | |
1635 | |
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59b052799158
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|
1636 if (dladdr((void *)addr, &dlinfo) != 0) { |
0 | 1637 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
1638 } | |
1639 | |
1640 return false; | |
1641 } | |
1642 | |
1643 bool os::dll_address_to_function_name(address addr, char *buf, | |
1644 int buflen, int *offset) { | |
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|
1645 // buf is not optional, but offset is optional |
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8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
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|
1646 assert(buf != NULL, "sanity check"); |
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diff
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|
1647 |
0 | 1648 Dl_info dlinfo; |
1649 | |
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|
1650 if (dladdr((void*)addr, &dlinfo) != 0) { |
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|
1651 // see if we have a matching symbol |
59b052799158
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diff
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|
1652 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
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|
1653 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { |
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|
1654 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
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|
1655 } |
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10986
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|
1656 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
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|
1657 return true; |
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diff
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|
1658 } |
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changeset
|
1659 // no matching symbol so try for just file info |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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diff
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|
1660 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
59b052799158
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10986
diff
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|
1661 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
59b052799158
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parents:
10986
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|
1662 buf, buflen, offset, dlinfo.dli_fname)) { |
59b052799158
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|
1663 return true; |
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|
1664 } |
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|
1665 } |
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|
1666 } |
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8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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|
1667 |
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|
1668 buf[0] = '\0'; |
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diff
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|
1669 if (offset != NULL) *offset = -1; |
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|
1670 return false; |
0 | 1671 } |
1672 | |
1673 struct _address_to_library_name { | |
1674 address addr; // input : memory address | |
1675 size_t buflen; // size of fname | |
1676 char* fname; // output: library name | |
1677 address base; // library base addr | |
1678 }; | |
1679 | |
1680 static int address_to_library_name_callback(struct dl_phdr_info *info, | |
1681 size_t size, void *data) { | |
1682 int i; | |
1683 bool found = false; | |
1684 address libbase = NULL; | |
1685 struct _address_to_library_name * d = (struct _address_to_library_name *)data; | |
1686 | |
1687 // iterate through all loadable segments | |
1688 for (i = 0; i < info->dlpi_phnum; i++) { | |
1689 address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr); | |
1690 if (info->dlpi_phdr[i].p_type == PT_LOAD) { | |
1691 // base address of a library is the lowest address of its loaded | |
1692 // segments. | |
1693 if (libbase == NULL || libbase > segbase) { | |
1694 libbase = segbase; | |
1695 } | |
1696 // see if 'addr' is within current segment | |
1697 if (segbase <= d->addr && | |
1698 d->addr < segbase + info->dlpi_phdr[i].p_memsz) { | |
1699 found = true; | |
1700 } | |
1701 } | |
1702 } | |
1703 | |
1704 // dlpi_name is NULL or empty if the ELF file is executable, return 0 | |
1705 // so dll_address_to_library_name() can fall through to use dladdr() which | |
1706 // can figure out executable name from argv[0]. | |
1707 if (found && info->dlpi_name && info->dlpi_name[0]) { | |
1708 d->base = libbase; | |
1709 if (d->fname) { | |
1710 jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name); | |
1711 } | |
1712 return 1; | |
1713 } | |
1714 return 0; | |
1715 } | |
1716 | |
1717 bool os::dll_address_to_library_name(address addr, char* buf, | |
1718 int buflen, int* offset) { | |
11092
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1719 // buf is not optional, but offset is optional |
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|
1720 assert(buf != NULL, "sanity check"); |
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|
1721 |
0 | 1722 Dl_info dlinfo; |
1723 struct _address_to_library_name data; | |
1724 | |
1725 // There is a bug in old glibc dladdr() implementation that it could resolve | |
1726 // to wrong library name if the .so file has a base address != NULL. Here | |
1727 // we iterate through the program headers of all loaded libraries to find | |
1728 // out which library 'addr' really belongs to. This workaround can be | |
1729 // removed once the minimum requirement for glibc is moved to 2.3.x. | |
1730 data.addr = addr; | |
1731 data.fname = buf; | |
1732 data.buflen = buflen; | |
1733 data.base = NULL; | |
1734 int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data); | |
1735 | |
1736 if (rslt) { | |
1737 // buf already contains library name | |
1738 if (offset) *offset = addr - data.base; | |
1739 return true; | |
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|
1740 } |
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1741 if (dladdr((void*)addr, &dlinfo) != 0) { |
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1742 if (dlinfo.dli_fname != NULL) { |
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1743 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
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|
1744 } |
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|
1745 if (dlinfo.dli_fbase != NULL && offset != NULL) { |
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|
1746 *offset = addr - (address)dlinfo.dli_fbase; |
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|
1747 } |
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|
1748 return true; |
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|
1749 } |
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|
1750 |
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|
1751 buf[0] = '\0'; |
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1752 if (offset) *offset = -1; |
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|
1753 return false; |
0 | 1754 } |
1755 | |
1756 // Loads .dll/.so and | |
1757 // in case of error it checks if .dll/.so was built for the | |
1758 // same architecture as Hotspot is running on | |
1759 | |
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1760 |
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1761 // Remember the stack's state. The Linux dynamic linker will change |
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1762 // the stack to 'executable' at most once, so we must safepoint only once. |
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1763 bool os::Linux::_stack_is_executable = false; |
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1764 |
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1765 // VM operation that loads a library. This is necessary if stack protection |
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1766 // of the Java stacks can be lost during loading the library. If we |
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1767 // do not stop the Java threads, they can stack overflow before the stacks |
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1768 // are protected again. |
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|
1769 class VM_LinuxDllLoad: public VM_Operation { |
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1770 private: |
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1771 const char *_filename; |
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1772 char *_ebuf; |
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1773 int _ebuflen; |
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1774 void *_lib; |
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1775 public: |
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1776 VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) : |
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1777 _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {} |
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1778 VMOp_Type type() const { return VMOp_LinuxDllLoad; } |
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1779 void doit() { |
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1780 _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen); |
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1781 os::Linux::_stack_is_executable = true; |
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1782 } |
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1783 void* loaded_library() { return _lib; } |
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1784 }; |
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1785 |
0 | 1786 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
1787 { | |
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1788 void * result = NULL; |
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|
1789 bool load_attempted = false; |
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1790 |
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1791 // Check whether the library to load might change execution rights |
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1792 // of the stack. If they are changed, the protection of the stack |
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1793 // guard pages will be lost. We need a safepoint to fix this. |
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1794 // |
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1795 // See Linux man page execstack(8) for more info. |
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1796 if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) { |
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1797 ElfFile ef(filename); |
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1798 if (!ef.specifies_noexecstack()) { |
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1799 if (!is_init_completed()) { |
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1800 os::Linux::_stack_is_executable = true; |
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1801 // This is OK - No Java threads have been created yet, and hence no |
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1802 // stack guard pages to fix. |
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|
1803 // |
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1804 // This should happen only when you are building JDK7 using a very |
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1805 // old version of JDK6 (e.g., with JPRT) and running test_gamma. |
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1806 // |
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1807 // Dynamic loader will make all stacks executable after |
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1808 // this function returns, and will not do that again. |
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1809 assert(Threads::first() == NULL, "no Java threads should exist yet."); |
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1810 } else { |
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1811 warning("You have loaded library %s which might have disabled stack guard. " |
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1812 "The VM will try to fix the stack guard now.\n" |
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1813 "It's highly recommended that you fix the library with " |
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1814 "'execstack -c <libfile>', or link it with '-z noexecstack'.", |
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1815 filename); |
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1816 |
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1817 assert(Thread::current()->is_Java_thread(), "must be Java thread"); |
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1818 JavaThread *jt = JavaThread::current(); |
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1819 if (jt->thread_state() != _thread_in_native) { |
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1820 // This happens when a compiler thread tries to load a hsdis-<arch>.so file |
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1821 // that requires ExecStack. Cannot enter safe point. Let's give up. |
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1822 warning("Unable to fix stack guard. Giving up."); |
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1823 } else { |
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1824 if (!LoadExecStackDllInVMThread) { |
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1825 // This is for the case where the DLL has an static |
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1826 // constructor function that executes JNI code. We cannot |
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1827 // load such DLLs in the VMThread. |
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1828 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1829 } |
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1830 |
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1831 ThreadInVMfromNative tiv(jt); |
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1832 debug_only(VMNativeEntryWrapper vew;) |
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1833 |
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1834 VM_LinuxDllLoad op(filename, ebuf, ebuflen); |
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1835 VMThread::execute(&op); |
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1836 if (LoadExecStackDllInVMThread) { |
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|
1837 result = op.loaded_library(); |
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|
1838 } |
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|
1839 load_attempted = true; |
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|
1840 } |
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1841 } |
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1842 } |
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1843 } |
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|
1844 |
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1845 if (!load_attempted) { |
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1846 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1847 } |
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1848 |
0 | 1849 if (result != NULL) { |
1850 // Successful loading | |
1851 return result; | |
1852 } | |
1853 | |
1854 Elf32_Ehdr elf_head; | |
1855 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
1856 char* diag_msg_buf=ebuf+strlen(ebuf); | |
1857 | |
1858 if (diag_msg_max_length==0) { | |
1859 // No more space in ebuf for additional diagnostics message | |
1860 return NULL; | |
1861 } | |
1862 | |
1863 | |
1864 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
1865 | |
1866 if (file_descriptor < 0) { | |
1867 // Can't open library, report dlerror() message | |
1868 return NULL; | |
1869 } | |
1870 | |
1871 bool failed_to_read_elf_head= | |
1872 (sizeof(elf_head)!= | |
1873 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
1874 | |
1875 ::close(file_descriptor); | |
1876 if (failed_to_read_elf_head) { | |
1877 // file i/o error - report dlerror() msg | |
1878 return NULL; | |
1879 } | |
1880 | |
1881 typedef struct { | |
1882 Elf32_Half code; // Actual value as defined in elf.h | |
1883 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
1884 char elf_class; // 32 or 64 bit | |
1885 char endianess; // MSB or LSB | |
1886 char* name; // String representation | |
1887 } arch_t; | |
1888 | |
1889 #ifndef EM_486 | |
1890 #define EM_486 6 /* Intel 80486 */ | |
1891 #endif | |
1892 | |
1893 static const arch_t arch_array[]={ | |
1894 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
1895 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
1896 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
1897 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
1898 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
1899 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
1900 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
1901 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
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1902 #if defined(VM_LITTLE_ENDIAN) |
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1903 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2LSB, (char*)"Power PC 64"}, |
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1904 #else |
1010 | 1905 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
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1906 #endif |
1010 | 1907 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, |
1908 {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, | |
1909 {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, | |
1910 {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, | |
1911 {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, | |
1912 {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, | |
1913 {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} | |
0 | 1914 }; |
1915 | |
1916 #if (defined IA32) | |
1917 static Elf32_Half running_arch_code=EM_386; | |
1918 #elif (defined AMD64) | |
1919 static Elf32_Half running_arch_code=EM_X86_64; | |
1920 #elif (defined IA64) | |
1921 static Elf32_Half running_arch_code=EM_IA_64; | |
1922 #elif (defined __sparc) && (defined _LP64) | |
1923 static Elf32_Half running_arch_code=EM_SPARCV9; | |
1924 #elif (defined __sparc) && (!defined _LP64) | |
1925 static Elf32_Half running_arch_code=EM_SPARC; | |
1926 #elif (defined __powerpc64__) | |
1927 static Elf32_Half running_arch_code=EM_PPC64; | |
1928 #elif (defined __powerpc__) | |
1929 static Elf32_Half running_arch_code=EM_PPC; | |
1010 | 1930 #elif (defined ARM) |
1931 static Elf32_Half running_arch_code=EM_ARM; | |
1932 #elif (defined S390) | |
1933 static Elf32_Half running_arch_code=EM_S390; | |
1934 #elif (defined ALPHA) | |
1935 static Elf32_Half running_arch_code=EM_ALPHA; | |
1936 #elif (defined MIPSEL) | |
1937 static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; | |
1938 #elif (defined PARISC) | |
1939 static Elf32_Half running_arch_code=EM_PARISC; | |
1940 #elif (defined MIPS) | |
1941 static Elf32_Half running_arch_code=EM_MIPS; | |
1942 #elif (defined M68K) | |
1943 static Elf32_Half running_arch_code=EM_68K; | |
0 | 1944 #else |
1945 #error Method os::dll_load requires that one of following is defined:\ | |
1010 | 1946 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
0 | 1947 #endif |
1948 | |
1949 // Identify compatability class for VM's architecture and library's architecture | |
1950 // Obtain string descriptions for architectures | |
1951 | |
1952 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
1953 int running_arch_index=-1; | |
1954 | |
1955 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
1956 if (running_arch_code == arch_array[i].code) { | |
1957 running_arch_index = i; | |
1958 } | |
1959 if (lib_arch.code == arch_array[i].code) { | |
1960 lib_arch.compat_class = arch_array[i].compat_class; | |
1961 lib_arch.name = arch_array[i].name; | |
1962 } | |
1963 } | |
1964 | |
1965 assert(running_arch_index != -1, | |
1966 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
1967 if (running_arch_index == -1) { | |
1968 // Even though running architecture detection failed | |
1969 // we may still continue with reporting dlerror() message | |
1970 return NULL; | |
1971 } | |
1972 | |
1973 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
1974 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
1975 return NULL; | |
1976 } | |
1977 | |
1010 | 1978 #ifndef S390 |
0 | 1979 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
1980 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
1981 return NULL; | |
1982 } | |
1010 | 1983 #endif // !S390 |
0 | 1984 |
1985 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
1986 if ( lib_arch.name!=NULL ) { | |
1987 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
1988 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
1989 lib_arch.name, arch_array[running_arch_index].name); | |
1990 } else { | |
1991 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
1992 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
1993 lib_arch.code, | |
1994 arch_array[running_arch_index].name); | |
1995 } | |
1996 } | |
1997 | |
1998 return NULL; | |
1999 } | |
2000 | |
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2001 void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) { |
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2002 void * result = ::dlopen(filename, RTLD_LAZY); |
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2003 if (result == NULL) { |
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2004 ::strncpy(ebuf, ::dlerror(), ebuflen - 1); |
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2005 ebuf[ebuflen-1] = '\0'; |
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2006 } |
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2007 return result; |
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2008 } |
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2009 |
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2010 void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) { |
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2011 void * result = NULL; |
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2012 if (LoadExecStackDllInVMThread) { |
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2013 result = dlopen_helper(filename, ebuf, ebuflen); |
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2014 } |
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2015 |
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2016 // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a |
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2017 // library that requires an executable stack, or which does not have this |
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2018 // stack attribute set, dlopen changes the stack attribute to executable. The |
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2019 // read protection of the guard pages gets lost. |
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2020 // |
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2021 // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad |
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2022 // may have been queued at the same time. |
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2023 |
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2024 if (!_stack_is_executable) { |
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2025 JavaThread *jt = Threads::first(); |
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2026 |
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2027 while (jt) { |
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2028 if (!jt->stack_guard_zone_unused() && // Stack not yet fully initialized |
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2029 jt->stack_yellow_zone_enabled()) { // No pending stack overflow exceptions |
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2030 if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(), |
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2031 jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) { |
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2032 warning("Attempt to reguard stack yellow zone failed."); |
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2033 } |
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2034 } |
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2035 jt = jt->next(); |
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2036 } |
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2037 } |
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2038 |
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2039 return result; |
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2040 } |
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2041 |
242 | 2042 /* |
2043 * glibc-2.0 libdl is not MT safe. If you are building with any glibc, | |
2044 * chances are you might want to run the generated bits against glibc-2.0 | |
2045 * libdl.so, so always use locking for any version of glibc. | |
2046 */ | |
2047 void* os::dll_lookup(void* handle, const char* name) { | |
2048 pthread_mutex_lock(&dl_mutex); | |
2049 void* res = dlsym(handle, name); | |
2050 pthread_mutex_unlock(&dl_mutex); | |
2051 return res; | |
2052 } | |
0 | 2053 |
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2054 void* os::get_default_process_handle() { |
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2055 return (void*)::dlopen(NULL, RTLD_LAZY); |
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2056 } |
0 | 2057 |
1980
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2058 static bool _print_ascii_file(const char* filename, outputStream* st) { |
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2059 int fd = ::open(filename, O_RDONLY); |
0 | 2060 if (fd == -1) { |
2061 return false; | |
2062 } | |
2063 | |
2064 char buf[32]; | |
2065 int bytes; | |
1980
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2066 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
0 | 2067 st->print_raw(buf, bytes); |
2068 } | |
2069 | |
1980
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2070 ::close(fd); |
0 | 2071 |
2072 return true; | |
2073 } | |
2074 | |
2075 void os::print_dll_info(outputStream *st) { | |
2076 st->print_cr("Dynamic libraries:"); | |
2077 | |
2078 char fname[32]; | |
2079 pid_t pid = os::Linux::gettid(); | |
2080 | |
2081 jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid); | |
2082 | |
2083 if (!_print_ascii_file(fname, st)) { | |
2084 st->print("Can not get library information for pid = %d\n", pid); | |
2085 } | |
2086 } | |
2087 | |
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2088 void os::print_os_info_brief(outputStream* st) { |
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2089 os::Linux::print_distro_info(st); |
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2090 |
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2091 os::Posix::print_uname_info(st); |
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2092 |
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2093 os::Linux::print_libversion_info(st); |
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2094 |
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2095 } |
0 | 2096 |
2097 void os::print_os_info(outputStream* st) { | |
2098 st->print("OS:"); | |
2099 | |
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2100 os::Linux::print_distro_info(st); |
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2101 |
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2102 os::Posix::print_uname_info(st); |
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2103 |
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2104 // Print warning if unsafe chroot environment detected |
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2105 if (unsafe_chroot_detected) { |
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2106 st->print("WARNING!! "); |
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2107 st->print_cr("%s", unstable_chroot_error); |
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2108 } |
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2109 |
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2110 os::Linux::print_libversion_info(st); |
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2111 |
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2112 os::Posix::print_rlimit_info(st); |
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2113 |
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2114 os::Posix::print_load_average(st); |
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2115 |
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2116 os::Linux::print_full_memory_info(st); |
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2117 } |
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2118 |
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2119 // Try to identify popular distros. |
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2120 // Most Linux distributions have a /etc/XXX-release file, which contains |
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2121 // the OS version string. Newer Linux distributions have a /etc/lsb-release |
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|
2122 // file that also contains the OS version string. Some have more than one |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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diff
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|
2123 // /etc/XXX-release file (e.g. Mandrake has both /etc/mandrake-release and |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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diff
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|
2124 // /etc/redhat-release.), so the order is important. |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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12211
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|
2125 // Any Linux that is based on Redhat (i.e. Oracle, Mandrake, Sun JDS...) have |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2126 // their own specific XXX-release file as well as a redhat-release file. |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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12211
diff
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|
2127 // Because of this the XXX-release file needs to be searched for before the |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2128 // redhat-release file. |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2129 // Since Red Hat has a lsb-release file that is not very descriptive the |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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12211
diff
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|
2130 // search for redhat-release needs to be before lsb-release. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2131 // Since the lsb-release file is the new standard it needs to be searched |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2132 // before the older style release files. |
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|
2133 // Searching system-release (Red Hat) and os-release (other Linuxes) are a |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2134 // next to last resort. The os-release file is a new standard that contains |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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12211
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|
2135 // distribution information and the system-release file seems to be an old |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2136 // standard that has been replaced by the lsb-release and os-release files. |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2137 // Searching for the debian_version file is the last resort. It contains |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2138 // an informative string like "6.0.6" or "wheezy/sid". Because of this |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2139 // "Debian " is printed before the contents of the debian_version file. |
6080
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|
2140 void os::Linux::print_distro_info(outputStream* st) { |
12212
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2141 if (!_print_ascii_file("/etc/oracle-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2142 !_print_ascii_file("/etc/mandriva-release", st) && |
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|
2143 !_print_ascii_file("/etc/mandrake-release", st) && |
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|
2144 !_print_ascii_file("/etc/sun-release", st) && |
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|
2145 !_print_ascii_file("/etc/redhat-release", st) && |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2146 !_print_ascii_file("/etc/lsb-release", st) && |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2147 !_print_ascii_file("/etc/SuSE-release", st) && |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2148 !_print_ascii_file("/etc/turbolinux-release", st) && |
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2149 !_print_ascii_file("/etc/gentoo-release", st) && |
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|
2150 !_print_ascii_file("/etc/ltib-release", st) && |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2151 !_print_ascii_file("/etc/angstrom-version", st) && |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2152 !_print_ascii_file("/etc/system-release", st) && |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2153 !_print_ascii_file("/etc/os-release", st)) { |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2154 |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2155 if (file_exists("/etc/debian_version")) { |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2156 st->print("Debian "); |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2157 _print_ascii_file("/etc/debian_version", st); |
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2158 } else { |
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|
2159 st->print("Linux"); |
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|
2160 } |
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|
2161 } |
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|
2162 st->cr(); |
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|
2163 } |
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|
2164 |
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|
2165 void os::Linux::print_libversion_info(outputStream* st) { |
0 | 2166 // libc, pthread |
2167 st->print("libc:"); | |
17937
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8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
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|
2168 st->print("%s ", os::Linux::glibc_version()); |
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
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|
2169 st->print("%s ", os::Linux::libpthread_version()); |
0 | 2170 if (os::Linux::is_LinuxThreads()) { |
2171 st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed"); | |
2172 } | |
2173 st->cr(); | |
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|
2174 } |
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|
2175 |
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|
2176 void os::Linux::print_full_memory_info(outputStream* st) { |
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|
2177 st->print("\n/proc/meminfo:\n"); |
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|
2178 _print_ascii_file("/proc/meminfo", st); |
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|
2179 st->cr(); |
3800
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
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3358
diff
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|
2180 } |
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|
2181 |
0 | 2182 void os::print_memory_info(outputStream* st) { |
2183 | |
2184 st->print("Memory:"); | |
2185 st->print(" %dk page", os::vm_page_size()>>10); | |
2186 | |
2187 // values in struct sysinfo are "unsigned long" | |
2188 struct sysinfo si; | |
2189 sysinfo(&si); | |
2190 | |
2191 st->print(", physical " UINT64_FORMAT "k", | |
2192 os::physical_memory() >> 10); | |
2193 st->print("(" UINT64_FORMAT "k free)", | |
2194 os::available_memory() >> 10); | |
2195 st->print(", swap " UINT64_FORMAT "k", | |
2196 ((jlong)si.totalswap * si.mem_unit) >> 10); | |
2197 st->print("(" UINT64_FORMAT "k free)", | |
2198 ((jlong)si.freeswap * si.mem_unit) >> 10); | |
2199 st->cr(); | |
2200 } | |
2201 | |
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|
2202 void os::pd_print_cpu_info(outputStream* st) { |
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|
2203 st->print("\n/proc/cpuinfo:\n"); |
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|
2204 if (!_print_ascii_file("/proc/cpuinfo", st)) { |
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diff
changeset
|
2205 st->print(" <Not Available>"); |
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diff
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|
2206 } |
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|
2207 st->cr(); |
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|
2208 } |
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|
2209 |
0 | 2210 void os::print_siginfo(outputStream* st, void* siginfo) { |
14410 | 2211 const siginfo_t* si = (const siginfo_t*)siginfo; |
2212 | |
2213 os::Posix::print_siginfo_brief(st, si); | |
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6e0cb14ce59b
8046070: Class Data Sharing clean up and refactoring
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20360
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|
2214 #if INCLUDE_CDS |
14410 | 2215 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && |
0 | 2216 UseSharedSpaces) { |
2217 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
2218 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
2219 st->print("\n\nError accessing class data sharing archive." \ | |
2220 " Mapped file inaccessible during execution, " \ | |
2221 " possible disk/network problem."); | |
2222 } | |
2223 } | |
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|
2224 #endif |
0 | 2225 st->cr(); |
2226 } | |
2227 | |
2228 | |
2229 static void print_signal_handler(outputStream* st, int sig, | |
2230 char* buf, size_t buflen); | |
2231 | |
2232 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
2233 st->print_cr("Signal Handlers:"); | |
2234 print_signal_handler(st, SIGSEGV, buf, buflen); | |
2235 print_signal_handler(st, SIGBUS , buf, buflen); | |
2236 print_signal_handler(st, SIGFPE , buf, buflen); | |
2237 print_signal_handler(st, SIGPIPE, buf, buflen); | |
2238 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
2239 print_signal_handler(st, SIGILL , buf, buflen); | |
2240 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
2241 print_signal_handler(st, SR_signum, buf, buflen); | |
2242 print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); | |
2243 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
2244 print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); | |
2245 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
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14422
diff
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|
2246 #if defined(PPC64) |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
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14422
diff
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|
2247 print_signal_handler(st, SIGTRAP, buf, buflen); |
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diff
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|
2248 #endif |
0 | 2249 } |
2250 | |
2251 static char saved_jvm_path[MAXPATHLEN] = {0}; | |
2252 | |
7456
7d42f3b08300
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|
2253 // Find the full path to the current module, libjvm.so |
1642 | 2254 void os::jvm_path(char *buf, jint buflen) { |
0 | 2255 // Error checking. |
1642 | 2256 if (buflen < MAXPATHLEN) { |
0 | 2257 assert(false, "must use a large-enough buffer"); |
2258 buf[0] = '\0'; | |
2259 return; | |
2260 } | |
2261 // Lazy resolve the path to current module. | |
2262 if (saved_jvm_path[0] != 0) { | |
2263 strcpy(buf, saved_jvm_path); | |
2264 return; | |
2265 } | |
2266 | |
2267 char dli_fname[MAXPATHLEN]; | |
2268 bool ret = dll_address_to_library_name( | |
2269 CAST_FROM_FN_PTR(address, os::jvm_path), | |
2270 dli_fname, sizeof(dli_fname), NULL); | |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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|
2271 assert(ret, "cannot locate libjvm"); |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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|
2272 char *rp = NULL; |
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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|
2273 if (ret && dli_fname[0] != '\0') { |
59b052799158
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|
2274 rp = realpath(dli_fname, buf); |
59b052799158
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|
2275 } |
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126ea7725993
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diff
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|
2276 if (rp == NULL) |
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|
2277 return; |
0 | 2278 |
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
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2204
diff
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|
2279 if (Arguments::created_by_gamma_launcher()) { |
0 | 2280 // Support for the gamma launcher. Typical value for buf is |
2281 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
2282 // the right place in the string, then assume we are installed in a JDK and | |
2283 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
2284 // up the path so it looks like libjvm.so is installed there (append a | |
2285 // fake suffix hotspot/libjvm.so). | |
2286 const char *p = buf + strlen(buf) - 1; | |
2287 for (int count = 0; p > buf && count < 5; ++count) { | |
2288 for (--p; p > buf && *p != '/'; --p) | |
2289 /* empty */ ; | |
2290 } | |
2291 | |
2292 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
2293 // Look for JAVA_HOME in the environment. | |
2294 char* java_home_var = ::getenv("JAVA_HOME"); | |
2295 if (java_home_var != NULL && java_home_var[0] != 0) { | |
1642 | 2296 char* jrelib_p; |
2297 int len; | |
2298 | |
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|
2299 // Check the current module name "libjvm.so". |
0 | 2300 p = strrchr(buf, '/'); |
2301 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
2302 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1642
diff
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|
2303 rp = realpath(java_home_var, buf); |
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|
2304 if (rp == NULL) |
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|
2305 return; |
1642 | 2306 |
2307 // determine if this is a legacy image or modules image | |
2308 // modules image doesn't have "jre" subdirectory | |
2309 len = strlen(buf); | |
17567 | 2310 assert(len < buflen, "Ran out of buffer room"); |
1642 | 2311 jrelib_p = buf + len; |
2312 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); | |
2313 if (0 != access(buf, F_OK)) { | |
2314 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); | |
2315 } | |
2316 | |
0 | 2317 if (0 == access(buf, F_OK)) { |
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7206
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|
2318 // Use current module name "libjvm.so" |
1642 | 2319 len = strlen(buf); |
7456
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7206
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|
2320 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); |
0 | 2321 } else { |
2322 // Go back to path of .so | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
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1642
diff
changeset
|
2323 rp = realpath(dli_fname, buf); |
126ea7725993
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1642
diff
changeset
|
2324 if (rp == NULL) |
513
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diff
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|
2325 return; |
0 | 2326 } |
2327 } | |
2328 } | |
2329 } | |
2330 | |
17567 | 2331 strncpy(saved_jvm_path, buf, MAXPATHLEN); |
0 | 2332 } |
2333 | |
2334 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
2335 // no prefix required, not even "_" | |
2336 } | |
2337 | |
2338 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
2339 // no suffix required | |
2340 } | |
2341 | |
2342 //////////////////////////////////////////////////////////////////////////////// | |
2343 // sun.misc.Signal support | |
2344 | |
2345 static volatile jint sigint_count = 0; | |
2346 | |
2347 static void | |
2348 UserHandler(int sig, void *siginfo, void *context) { | |
2349 // 4511530 - sem_post is serialized and handled by the manager thread. When | |
2350 // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We | |
2351 // don't want to flood the manager thread with sem_post requests. | |
2352 if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) | |
2353 return; | |
2354 | |
2355 // Ctrl-C is pressed during error reporting, likely because the error | |
2356 // handler fails to abort. Let VM die immediately. | |
2357 if (sig == SIGINT && is_error_reported()) { | |
2358 os::die(); | |
2359 } | |
2360 | |
2361 os::signal_notify(sig); | |
2362 } | |
2363 | |
2364 void* os::user_handler() { | |
2365 return CAST_FROM_FN_PTR(void*, UserHandler); | |
2366 } | |
2367 | |
10405 | 2368 class Semaphore : public StackObj { |
2369 public: | |
2370 Semaphore(); | |
2371 ~Semaphore(); | |
2372 void signal(); | |
2373 void wait(); | |
2374 bool trywait(); | |
2375 bool timedwait(unsigned int sec, int nsec); | |
2376 private: | |
2377 sem_t _semaphore; | |
2378 }; | |
2379 | |
2380 Semaphore::Semaphore() { | |
2381 sem_init(&_semaphore, 0, 0); | |
2382 } | |
2383 | |
2384 Semaphore::~Semaphore() { | |
2385 sem_destroy(&_semaphore); | |
2386 } | |
2387 | |
2388 void Semaphore::signal() { | |
2389 sem_post(&_semaphore); | |
2390 } | |
2391 | |
2392 void Semaphore::wait() { | |
2393 sem_wait(&_semaphore); | |
2394 } | |
2395 | |
2396 bool Semaphore::trywait() { | |
2397 return sem_trywait(&_semaphore) == 0; | |
2398 } | |
2399 | |
2400 bool Semaphore::timedwait(unsigned int sec, int nsec) { | |
17738 | 2401 |
10405 | 2402 struct timespec ts; |
17738 | 2403 // Semaphore's are always associated with CLOCK_REALTIME |
2404 os::Linux::clock_gettime(CLOCK_REALTIME, &ts); | |
2405 // see unpackTime for discussion on overflow checking | |
2406 if (sec >= MAX_SECS) { | |
2407 ts.tv_sec += MAX_SECS; | |
2408 ts.tv_nsec = 0; | |
2409 } else { | |
2410 ts.tv_sec += sec; | |
2411 ts.tv_nsec += nsec; | |
2412 if (ts.tv_nsec >= NANOSECS_PER_SEC) { | |
2413 ts.tv_nsec -= NANOSECS_PER_SEC; | |
2414 ++ts.tv_sec; // note: this must be <= max_secs | |
2415 } | |
2416 } | |
10405 | 2417 |
2418 while (1) { | |
2419 int result = sem_timedwait(&_semaphore, &ts); | |
2420 if (result == 0) { | |
2421 return true; | |
2422 } else if (errno == EINTR) { | |
2423 continue; | |
2424 } else if (errno == ETIMEDOUT) { | |
2425 return false; | |
2426 } else { | |
2427 return false; | |
2428 } | |
2429 } | |
2430 } | |
2431 | |
0 | 2432 extern "C" { |
2433 typedef void (*sa_handler_t)(int); | |
2434 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
2435 } | |
2436 | |
2437 void* os::signal(int signal_number, void* handler) { | |
2438 struct sigaction sigAct, oldSigAct; | |
2439 | |
2440 sigfillset(&(sigAct.sa_mask)); | |
2441 sigAct.sa_flags = SA_RESTART|SA_SIGINFO; | |
2442 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
2443 | |
2444 if (sigaction(signal_number, &sigAct, &oldSigAct)) { | |
2445 // -1 means registration failed | |
2446 return (void *)-1; | |
2447 } | |
2448 | |
2449 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
2450 } | |
2451 | |
2452 void os::signal_raise(int signal_number) { | |
2453 ::raise(signal_number); | |
2454 } | |
2455 | |
2456 /* | |
2457 * The following code is moved from os.cpp for making this | |
2458 * code platform specific, which it is by its very nature. | |
2459 */ | |
2460 | |
2461 // Will be modified when max signal is changed to be dynamic | |
2462 int os::sigexitnum_pd() { | |
2463 return NSIG; | |
2464 } | |
2465 | |
2466 // a counter for each possible signal value | |
2467 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
2468 | |
2469 // Linux(POSIX) specific hand shaking semaphore. | |
2470 static sem_t sig_sem; | |
10405 | 2471 static Semaphore sr_semaphore; |
0 | 2472 |
2473 void os::signal_init_pd() { | |
2474 // Initialize signal structures | |
2475 ::memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
2476 | |
2477 // Initialize signal semaphore | |
2478 ::sem_init(&sig_sem, 0, 0); | |
2479 } | |
2480 | |
2481 void os::signal_notify(int sig) { | |
2482 Atomic::inc(&pending_signals[sig]); | |
2483 ::sem_post(&sig_sem); | |
2484 } | |
2485 | |
2486 static int check_pending_signals(bool wait) { | |
2487 Atomic::store(0, &sigint_count); | |
2488 for (;;) { | |
2489 for (int i = 0; i < NSIG + 1; i++) { | |
2490 jint n = pending_signals[i]; | |
2491 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
2492 return i; | |
2493 } | |
2494 } | |
2495 if (!wait) { | |
2496 return -1; | |
2497 } | |
2498 JavaThread *thread = JavaThread::current(); | |
2499 ThreadBlockInVM tbivm(thread); | |
2500 | |
2501 bool threadIsSuspended; | |
2502 do { | |
2503 thread->set_suspend_equivalent(); | |
2504 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
2505 ::sem_wait(&sig_sem); | |
2506 | |
2507 // were we externally suspended while we were waiting? | |
2508 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
2509 if (threadIsSuspended) { | |
2510 // | |
2511 // The semaphore has been incremented, but while we were waiting | |
2512 // another thread suspended us. We don't want to continue running | |
2513 // while suspended because that would surprise the thread that | |
2514 // suspended us. | |
2515 // | |
2516 ::sem_post(&sig_sem); | |
2517 | |
2518 thread->java_suspend_self(); | |
2519 } | |
2520 } while (threadIsSuspended); | |
2521 } | |
2522 } | |
2523 | |
2524 int os::signal_lookup() { | |
2525 return check_pending_signals(false); | |
2526 } | |
2527 | |
2528 int os::signal_wait() { | |
2529 return check_pending_signals(true); | |
2530 } | |
2531 | |
2532 //////////////////////////////////////////////////////////////////////////////// | |
2533 // Virtual Memory | |
2534 | |
2535 int os::vm_page_size() { | |
2536 // Seems redundant as all get out | |
2537 assert(os::Linux::page_size() != -1, "must call os::init"); | |
2538 return os::Linux::page_size(); | |
2539 } | |
2540 | |
2541 // Solaris allocates memory by pages. | |
2542 int os::vm_allocation_granularity() { | |
2543 assert(os::Linux::page_size() != -1, "must call os::init"); | |
2544 return os::Linux::page_size(); | |
2545 } | |
2546 | |
2547 // Rationale behind this function: | |
2548 // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable | |
2549 // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get | |
2550 // samples for JITted code. Here we create private executable mapping over the code cache | |
2551 // and then we can use standard (well, almost, as mapping can change) way to provide | |
2552 // info for the reporting script by storing timestamp and location of symbol | |
2553 void linux_wrap_code(char* base, size_t size) { | |
2554 static volatile jint cnt = 0; | |
2555 | |
2556 if (!UseOprofile) { | |
2557 return; | |
2558 } | |
2559 | |
1497
96d554193f72
6944822: Fix for 6938627 exposes problem with hard-coded buffer sizes
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diff
changeset
|
2560 char buf[PATH_MAX+1]; |
0 | 2561 int num = Atomic::add(1, &cnt); |
2562 | |
1353
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
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1325
diff
changeset
|
2563 snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d", |
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
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1325
diff
changeset
|
2564 os::get_temp_directory(), os::current_process_id(), num); |
0 | 2565 unlink(buf); |
2566 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2567 int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
0 | 2568 |
2569 if (fd != -1) { | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2570 off_t rv = ::lseek(fd, size-2, SEEK_SET); |
0 | 2571 if (rv != (off_t)-1) { |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2572 if (::write(fd, "", 1) == 1) { |
0 | 2573 mmap(base, size, |
2574 PROT_READ|PROT_WRITE|PROT_EXEC, | |
2575 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); | |
2576 } | |
2577 } | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2578 ::close(fd); |
0 | 2579 unlink(buf); |
2580 } | |
2581 } | |
2582 | |
10969
a837fa3d3f86
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|
2583 static bool recoverable_mmap_error(int err) { |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2584 // See if the error is one we can let the caller handle. This |
a837fa3d3f86
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diff
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|
2585 // list of errno values comes from JBS-6843484. I can't find a |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2586 // Linux man page that documents this specific set of errno |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2587 // values so while this list currently matches Solaris, it may |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2588 // change as we gain experience with this failure mode. |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2589 switch (err) { |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2590 case EBADF: |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2591 case EINVAL: |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2592 case ENOTSUP: |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2593 // let the caller deal with these errors |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2594 return true; |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2595 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2596 default: |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2597 // Any remaining errors on this OS can cause our reserved mapping |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2598 // to be lost. That can cause confusion where different data |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2599 // structures think they have the same memory mapped. The worst |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2600 // scenario is if both the VM and a library think they have the |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2601 // same memory mapped. |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2602 return false; |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2603 } |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2604 } |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2605 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2606 static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2607 int err) { |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2608 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2609 ", %d) failed; error='%s' (errno=%d)", addr, size, exec, |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2610 strerror(err), err); |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2611 } |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2612 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2613 static void warn_fail_commit_memory(char* addr, size_t size, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
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diff
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|
2614 size_t alignment_hint, bool exec, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2615 int err) { |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2616 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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parents:
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diff
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|
2617 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, size, |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2618 alignment_hint, exec, strerror(err), err); |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2619 } |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2620 |
0 | 2621 // NOTE: Linux kernel does not really reserve the pages for us. |
2622 // All it does is to check if there are enough free pages | |
2623 // left at the time of mmap(). This could be a potential | |
2624 // problem. | |
10969
a837fa3d3f86
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diff
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|
2625 int os::Linux::commit_memory_impl(char* addr, size_t size, bool exec) { |
656 | 2626 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
2627 uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, | |
0 | 2628 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
3885 | 2629 if (res != (uintptr_t) MAP_FAILED) { |
2630 if (UseNUMAInterleaving) { | |
2631 numa_make_global(addr, size); | |
2632 } | |
10969
a837fa3d3f86
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|
2633 return 0; |
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diff
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|
2634 } |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2635 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2636 int err = errno; // save errno from mmap() call above |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2637 |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2638 if (!recoverable_mmap_error(err)) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2639 warn_fail_commit_memory(addr, size, exec, err); |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2640 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "committing reserved memory."); |
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10405
diff
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|
2641 } |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2642 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2643 return err; |
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10405
diff
changeset
|
2644 } |
a837fa3d3f86
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diff
changeset
|
2645 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2646 bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2647 return os::Linux::commit_memory_impl(addr, size, exec) == 0; |
a837fa3d3f86
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diff
changeset
|
2648 } |
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|
2649 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2650 void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2651 const char* mesg) { |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2652 assert(mesg != NULL, "mesg must be specified"); |
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|
2653 int err = os::Linux::commit_memory_impl(addr, size, exec); |
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|
2654 if (err != 0) { |
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|
2655 // the caller wants all commit errors to exit with the specified mesg: |
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|
2656 warn_fail_commit_memory(addr, size, exec, err); |
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|
2657 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
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|
2658 } |
0 | 2659 } |
2660 | |
3286
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|
2661 // Define MAP_HUGETLB here so we can build HotSpot on old systems. |
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|
2662 #ifndef MAP_HUGETLB |
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7034464: Support transparent large pages on Linux
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|
2663 #define MAP_HUGETLB 0x40000 |
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|
2664 #endif |
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|
2665 |
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|
2666 // Define MADV_HUGEPAGE here so we can build HotSpot on old systems. |
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|
2667 #ifndef MADV_HUGEPAGE |
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|
2668 #define MADV_HUGEPAGE 14 |
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|
2669 #endif |
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|
2670 |
10969
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|
2671 int os::Linux::commit_memory_impl(char* addr, size_t size, |
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|
2672 size_t alignment_hint, bool exec) { |
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|
2673 int err = os::Linux::commit_memory_impl(addr, size, exec); |
10969
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|
2674 if (err == 0) { |
3913
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
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|
2675 realign_memory(addr, size, alignment_hint); |
10969
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|
2676 } |
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|
2677 return err; |
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|
2678 } |
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|
2679 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2680 bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
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|
2681 bool exec) { |
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|
2682 return os::Linux::commit_memory_impl(addr, size, alignment_hint, exec) == 0; |
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|
2683 } |
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|
2684 |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2685 void os::pd_commit_memory_or_exit(char* addr, size_t size, |
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|
2686 size_t alignment_hint, bool exec, |
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|
2687 const char* mesg) { |
a837fa3d3f86
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|
2688 assert(mesg != NULL, "mesg must be specified"); |
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|
2689 int err = os::Linux::commit_memory_impl(addr, size, alignment_hint, exec); |
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|
2690 if (err != 0) { |
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|
2691 // the caller wants all commit errors to exit with the specified mesg: |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2692 warn_fail_commit_memory(addr, size, alignment_hint, exec, err); |
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2693 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
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|
2694 } |
0 | 2695 } |
2696 | |
6197 | 2697 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
12110
4c84d351cca9
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|
2698 if (UseTransparentHugePages && alignment_hint > (size_t)vm_page_size()) { |
3286
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|
2699 // We don't check the return value: madvise(MADV_HUGEPAGE) may not |
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|
2700 // be supported or the memory may already be backed by huge pages. |
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|
2701 ::madvise(addr, bytes, MADV_HUGEPAGE); |
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|
2702 } |
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|
2703 } |
141 | 2704 |
6197 | 2705 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
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5909
diff
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|
2706 // 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
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diff
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|
2707 // 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
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5909
diff
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|
2708 // 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
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5909
diff
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|
2709 // 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
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diff
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|
2710 // allow that in any case. |
12110
4c84d351cca9
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|
2711 if (alignment_hint <= (size_t)os::vm_page_size() || can_commit_large_page_memory()) { |
10969
a837fa3d3f86
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|
2712 commit_memory(addr, bytes, alignment_hint, !ExecMem); |
5937
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|
2713 } |
141 | 2714 } |
2715 | |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2716 void os::numa_make_global(char *addr, size_t bytes) { |
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2717 Linux::numa_interleave_memory(addr, bytes); |
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|
2718 } |
141 | 2719 |
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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|
2720 // Define for numa_set_bind_policy(int). Setting the argument to 0 will set the |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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|
2721 // bind policy to MPOL_PREFERRED for the current thread. |
88c255656030
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diff
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|
2722 #define USE_MPOL_PREFERRED 0 |
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|
2723 |
141 | 2724 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
12176
88c255656030
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diff
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|
2725 // To make NUMA and large pages more robust when both enabled, we need to ease |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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diff
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|
2726 // the requirements on where the memory should be allocated. MPOL_BIND is the |
88c255656030
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|
2727 // default policy and it will force memory to be allocated on the specified |
88c255656030
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diff
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|
2728 // node. Changing this to MPOL_PREFERRED will prefer to allocate the memory on |
88c255656030
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diff
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|
2729 // the specified node, but will not force it. Using this policy will prevent |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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diff
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|
2730 // getting SIGBUS when trying to allocate large pages on NUMA nodes with no |
88c255656030
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11092
diff
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|
2731 // free large pages. |
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|
2732 Linux::numa_set_bind_policy(USE_MPOL_PREFERRED); |
141 | 2733 Linux::numa_tonode_memory(addr, bytes, lgrp_hint); |
2734 } | |
2735 | |
2736 bool os::numa_topology_changed() { return false; } | |
2737 | |
2738 size_t os::numa_get_groups_num() { | |
2739 int max_node = Linux::numa_max_node(); | |
2740 return max_node > 0 ? max_node + 1 : 1; | |
2741 } | |
2742 | |
2743 int os::numa_get_group_id() { | |
2744 int cpu_id = Linux::sched_getcpu(); | |
2745 if (cpu_id != -1) { | |
2746 int lgrp_id = Linux::get_node_by_cpu(cpu_id); | |
2747 if (lgrp_id != -1) { | |
2748 return lgrp_id; | |
2749 } | |
0 | 2750 } |
2751 return 0; | |
2752 } | |
2753 | |
141 | 2754 size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
2755 for (size_t i = 0; i < size; i++) { | |
2756 ids[i] = i; | |
2757 } | |
2758 return size; | |
2759 } | |
2760 | |
0 | 2761 bool os::get_page_info(char *start, page_info* info) { |
2762 return false; | |
2763 } | |
2764 | |
2765 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
2766 return end; | |
2767 } | |
2768 | |
3826 | 2769 |
2770 int os::Linux::sched_getcpu_syscall(void) { | |
23822
626f594dffa6
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
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|
2771 unsigned int cpu = 0; |
3826 | 2772 int retval = -1; |
2773 | |
2774 #if defined(IA32) | |
3887
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|
2775 # ifndef SYS_getcpu |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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|
2776 # define SYS_getcpu 318 |
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|
2777 # endif |
3826 | 2778 retval = syscall(SYS_getcpu, &cpu, NULL, NULL); |
2779 #elif defined(AMD64) | |
3887
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|
2780 // Unfortunately we have to bring all these macros here from vsyscall.h |
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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|
2781 // to be able to compile on old linuxes. |
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|
2782 # define __NR_vgetcpu 2 |
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7082645: Hotspot doesn't compile on old linuxes after 7060836
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|
2783 # define VSYSCALL_START (-10UL << 20) |
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|
2784 # define VSYSCALL_SIZE 1024 |
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|
2785 # define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) |
3826 | 2786 typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache); |
2787 vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu); | |
2788 retval = vgetcpu(&cpu, NULL, NULL); | |
2789 #endif | |
2790 | |
2791 return (retval == -1) ? retval : cpu; | |
2792 } | |
2793 | |
2191 | 2794 // Something to do with the numa-aware allocator needs these symbols |
2795 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { } | |
2796 extern "C" JNIEXPORT void numa_error(char *where) { } | |
2797 extern "C" JNIEXPORT int fork1() { return fork(); } | |
141 | 2798 |
763
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2799 |
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|
2800 // If we are running with libnuma version > 2, then we should |
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2801 // be trying to use symbols with versions 1.1 |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2802 // If we are running with earlier version, which did not have symbol versions, |
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
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|
2803 // we should use the base version. |
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
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|
2804 void* os::Linux::libnuma_dlsym(void* handle, const char *name) { |
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2805 void *f = dlvsym(handle, name, "libnuma_1.1"); |
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2806 if (f == NULL) { |
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changeset
|
2807 f = dlsym(handle, name); |
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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|
2808 } |
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|
2809 return f; |
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|
2810 } |
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|
2811 |
462
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changeset
|
2812 bool os::Linux::libnuma_init() { |
141 | 2813 // sched_getcpu() should be in libc. |
2814 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, | |
2815 dlsym(RTLD_DEFAULT, "sched_getcpu"))); | |
2816 | |
3826 | 2817 // If it's not, try a direct syscall. |
2818 if (sched_getcpu() == -1) | |
2819 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall)); | |
2820 | |
141 | 2821 if (sched_getcpu() != -1) { // Does it work? |
267
9d6a3a6891f8
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199
diff
changeset
|
2822 void *handle = dlopen("libnuma.so.1", RTLD_LAZY); |
141 | 2823 if (handle != NULL) { |
2824 set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t, | |
763
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diff
changeset
|
2825 libnuma_dlsym(handle, "numa_node_to_cpus"))); |
141 | 2826 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
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parents:
761
diff
changeset
|
2827 libnuma_dlsym(handle, "numa_max_node"))); |
141 | 2828 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
|
2829 libnuma_dlsym(handle, "numa_available"))); |
141 | 2830 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
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parents:
761
diff
changeset
|
2831 libnuma_dlsym(handle, "numa_tonode_memory"))); |
462
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|
2832 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
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761
diff
changeset
|
2833 libnuma_dlsym(handle, "numa_interleave_memory"))); |
12176
88c255656030
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mgerdin
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11092
diff
changeset
|
2834 set_numa_set_bind_policy(CAST_TO_FN_PTR(numa_set_bind_policy_func_t, |
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2835 libnuma_dlsym(handle, "numa_set_bind_policy"))); |
462
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|
2836 |
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|
2837 |
141 | 2838 if (numa_available() != -1) { |
763
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iveresov
parents:
761
diff
changeset
|
2839 set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes")); |
141 | 2840 // Create a cpu -> node mapping |
6197 | 2841 _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(0, true); |
141 | 2842 rebuild_cpu_to_node_map(); |
462
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|
2843 return true; |
141 | 2844 } |
2845 } | |
2846 } | |
462
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diff
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|
2847 return false; |
141 | 2848 } |
2849 | |
2850 // rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id. | |
2851 // The table is later used in get_node_by_cpu(). | |
2852 void os::Linux::rebuild_cpu_to_node_map() { | |
462
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diff
changeset
|
2853 const size_t NCPUS = 32768; // Since the buffer size computation is very obscure |
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|
2854 // in libnuma (possible values are starting from 16, |
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|
2855 // and continuing up with every other power of 2, but less |
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diff
changeset
|
2856 // than the maximum number of CPUs supported by kernel), and |
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
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|
2857 // 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()
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diff
changeset
|
2858 // are more reasonable) we'll just hardcode the number they use |
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2859 // in the library. |
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
changeset
|
2860 const size_t BitsPerCLong = sizeof(long) * CHAR_BIT; |
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diff
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|
2861 |
24233
8128b98d4736
Crash in rebuild_cpu_to_node_map (JDK-8165153)
Doug Simon <doug.simon@oracle.com>
parents:
24218
diff
changeset
|
2862 size_t cpu_num = processor_count(); |
462
85f1b9537f70
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|
2863 size_t cpu_map_size = NCPUS / BitsPerCLong; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
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|
2864 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
|
2865 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()
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356
diff
changeset
|
2866 |
141 | 2867 cpu_to_node()->clear(); |
2868 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
|
2869 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
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356
diff
changeset
|
2870 |
6197 | 2871 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()
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parents:
356
diff
changeset
|
2872 for (size_t i = 0; i < node_num; i++) { |
141 | 2873 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
|
2874 for (size_t j = 0; j < cpu_map_valid_size; j++) { |
141 | 2875 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
|
2876 for (size_t k = 0; k < BitsPerCLong; k++) { |
141 | 2877 if (cpu_map[j] & (1UL << k)) { |
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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parents:
356
diff
changeset
|
2878 cpu_to_node()->at_put(j * BitsPerCLong + k, i); |
141 | 2879 } |
2880 } | |
2881 } | |
2882 } | |
2883 } | |
2884 } | |
6197 | 2885 FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal); |
141 | 2886 } |
2887 | |
2888 int os::Linux::get_node_by_cpu(int cpu_id) { | |
2889 if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) { | |
2890 return cpu_to_node()->at(cpu_id); | |
2891 } | |
2892 return -1; | |
2893 } | |
2894 | |
2895 GrowableArray<int>* os::Linux::_cpu_to_node; | |
2896 os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu; | |
2897 os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus; | |
2898 os::Linux::numa_max_node_func_t os::Linux::_numa_max_node; | |
2899 os::Linux::numa_available_func_t os::Linux::_numa_available; | |
2900 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
|
2901 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory; |
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2902 os::Linux::numa_set_bind_policy_func_t os::Linux::_numa_set_bind_policy; |
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
2903 unsigned long* os::Linux::_numa_all_nodes; |
141 | 2904 |
6197 | 2905 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
|
2906 uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2907 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2908 return res != (uintptr_t) MAP_FAILED; |
0 | 2909 } |
2910 | |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
2911 static |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
2912 address get_stack_commited_bottom(address bottom, size_t size) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2913 address nbot = bottom; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
changeset
|
2914 address ntop = bottom + size; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
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|
2915 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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|
2916 size_t page_sz = os::vm_page_size(); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
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|
2917 unsigned pages = size / page_sz; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
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|
2918 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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12110
diff
changeset
|
2919 unsigned char vec[1]; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2920 unsigned imin = 1, imax = pages + 1, imid; |
17765 | 2921 int mincore_return_value = 0; |
2922 | |
2923 assert(imin <= imax, "Unexpected page size"); | |
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
2924 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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12110
diff
changeset
|
2925 while (imin < imax) { |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2926 imid = (imax + imin) / 2; |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2927 nbot = ntop - (imid * page_sz); |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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12110
diff
changeset
|
2928 |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2929 // Use a trick with mincore to check whether the page is mapped or not. |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
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|
2930 // mincore sets vec to 1 if page resides in memory and to 0 if page |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2931 // is swapped output but if page we are asking for is unmapped |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
2932 // it returns -1,ENOMEM |
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
2933 mincore_return_value = mincore(nbot, page_sz, vec); |
d8e99408faad
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|
2934 |
d8e99408faad
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dsamersoff
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|
2935 if (mincore_return_value == -1) { |
d8e99408faad
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diff
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|
2936 // Page is not mapped go up |
d8e99408faad
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dsamersoff
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diff
changeset
|
2937 // to find first mapped page |
d8e99408faad
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changeset
|
2938 if (errno != EAGAIN) { |
d8e99408faad
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dsamersoff
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|
2939 assert(errno == ENOMEM, "Unexpected mincore errno"); |
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diff
changeset
|
2940 imax = imid; |
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diff
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|
2941 } |
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8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
2942 } else { |
d8e99408faad
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|
2943 // Page is mapped go down |
d8e99408faad
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|
2944 // to find first not mapped page |
d8e99408faad
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|
2945 imin = imid + 1; |
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|
2946 } |
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|
2947 } |
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|
2948 |
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|
2949 nbot = nbot + page_sz; |
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|
2950 |
d8e99408faad
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|
2951 // Adjust stack bottom one page up if last checked page is not mapped |
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|
2952 if (mincore_return_value == -1) { |
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|
2953 nbot = nbot + page_sz; |
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|
2954 } |
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|
2955 |
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changeset
|
2956 return nbot; |
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|
2957 } |
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|
2958 |
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|
2959 |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
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|
2960 // 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
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1123
diff
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|
2961 // 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
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diff
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|
2962 // stack cannot grow beyond the pages where the stack guard was |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
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diff
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|
2963 // 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
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1123
diff
changeset
|
2964 // that point, the Linux kernel cannot expand the stack any further |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
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1123
diff
changeset
|
2965 // 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
|
2966 // |
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
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1123
diff
changeset
|
2967 // 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
|
2968 // 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
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|
2969 // so if the stack mapping has already grown beyond the guard pages at |
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2970 // the time we create them, we have to truncate the stack mapping. |
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2971 // So, we need to know the extent of the stack mapping when |
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|
2972 // create_stack_guard_pages() is called. |
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|
2973 |
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2974 // We only need this for stacks that are growable: at the time of |
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2975 // writing thread stacks don't use growable mappings (i.e. those |
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2976 // creeated with MAP_GROWSDOWN), and aren't marked "[stack]", so this |
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2977 // only applies to the main thread. |
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
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2978 |
1320
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2979 // If the (growable) stack mapping already extends beyond the point |
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2980 // where we're going to put our guard pages, truncate the mapping at |
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2981 // that point by munmap()ping it. This ensures that when we later |
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2982 // munmap() the guard pages we don't leave a hole in the stack |
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2983 // mapping. This only affects the main/initial thread |
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2984 |
6197 | 2985 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
12144
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2986 |
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2987 if (os::Linux::is_initial_thread()) { |
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2988 // As we manually grow stack up to bottom inside create_attached_thread(), |
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2989 // it's likely that os::Linux::initial_thread_stack_bottom is mapped and |
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2990 // we don't need to do anything special. |
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2991 // Check it first, before calling heavy function. |
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2992 uintptr_t stack_extent = (uintptr_t) os::Linux::initial_thread_stack_bottom(); |
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2993 unsigned char vec[1]; |
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|
2994 |
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2995 if (mincore((address)stack_extent, os::vm_page_size(), vec) == -1) { |
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2996 // Fallback to slow path on all errors, including EAGAIN |
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2997 stack_extent = (uintptr_t) get_stack_commited_bottom( |
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2998 os::Linux::initial_thread_stack_bottom(), |
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2999 (size_t)addr - stack_extent); |
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3000 } |
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3001 |
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3002 if (stack_extent < (uintptr_t)addr) { |
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3003 ::munmap((void*)stack_extent, (uintptr_t)(addr - stack_extent)); |
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3004 } |
1320
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3005 } |
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3006 |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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3007 return os::commit_memory(addr, size, !ExecMem); |
1320
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3008 } |
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3009 |
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3010 // If this is a growable mapping, remove the guard pages entirely by |
1750
c7004d700b49
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3011 // munmap()ping them. If not, just call uncommit_memory(). This only |
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|
3012 // affects the main/initial thread, but guard against future OS changes |
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3013 // It's safe to always unmap guard pages for initial thread because we |
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3014 // always place it right after end of the mapped region |
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3015 |
1320
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3016 bool os::remove_stack_guard_pages(char* addr, size_t size) { |
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3017 uintptr_t stack_extent, stack_base; |
12144
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3018 |
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|
3019 if (os::Linux::is_initial_thread()) { |
1320
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3020 return ::munmap(addr, size) == 0; |
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|
3021 } |
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|
3022 |
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3023 return os::uncommit_memory(addr, size); |
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|
3024 } |
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|
3025 |
0 | 3026 static address _highest_vm_reserved_address = NULL; |
3027 | |
3028 // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory | |
3029 // at 'requested_addr'. If there are existing memory mappings at the same | |
3030 // location, however, they will be overwritten. If 'fixed' is false, | |
3031 // 'requested_addr' is only treated as a hint, the return value may or | |
3032 // may not start from the requested address. Unlike Linux mmap(), this | |
3033 // function returns NULL to indicate failure. | |
3034 static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { | |
3035 char * addr; | |
3036 int flags; | |
3037 | |
3038 flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; | |
3039 if (fixed) { | |
3040 assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address"); | |
3041 flags |= MAP_FIXED; | |
3042 } | |
3043 | |
10157 | 3044 // Map reserved/uncommitted pages PROT_NONE so we fail early if we |
3045 // touch an uncommitted page. Otherwise, the read/write might | |
3046 // succeed if we have enough swap space to back the physical page. | |
3047 addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, | |
0 | 3048 flags, -1, 0); |
3049 | |
3050 if (addr != MAP_FAILED) { | |
3051 // anon_mmap() should only get called during VM initialization, | |
3052 // don't need lock (actually we can skip locking even it can be called | |
3053 // from multiple threads, because _highest_vm_reserved_address is just a | |
3054 // hint about the upper limit of non-stack memory regions.) | |
3055 if ((address)addr + bytes > _highest_vm_reserved_address) { | |
3056 _highest_vm_reserved_address = (address)addr + bytes; | |
3057 } | |
3058 } | |
3059 | |
3060 return addr == MAP_FAILED ? NULL : addr; | |
3061 } | |
3062 | |
24007
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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|
3063 // Allocate (using mmap, NO_RESERVE, with small pages) at either a given request address |
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|
3064 // (req_addr != NULL) or with a given alignment. |
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|
3065 // - bytes shall be a multiple of alignment. |
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|
3066 // - req_addr can be NULL. If not NULL, it must be a multiple of alignment. |
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|
3067 // - alignment sets the alignment at which memory shall be allocated. |
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|
3068 // It must be a multiple of allocation granularity. |
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|
3069 // Returns address of memory or NULL. If req_addr was not NULL, will only return |
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|
3070 // req_addr or NULL. |
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|
3071 static char* anon_mmap_aligned(size_t bytes, size_t alignment, char* req_addr) { |
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3072 |
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|
3073 size_t extra_size = bytes; |
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|
3074 if (req_addr == NULL && alignment > 0) { |
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|
3075 extra_size += alignment; |
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|
3076 } |
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3077 |
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|
3078 char* start = (char*) ::mmap(req_addr, extra_size, PROT_NONE, |
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|
3079 MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, |
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3080 -1, 0); |
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3081 if (start == MAP_FAILED) { |
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|
3082 start = NULL; |
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3083 } else { |
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3084 if (req_addr != NULL) { |
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3085 if (start != req_addr) { |
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3086 ::munmap(start, extra_size); |
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3087 start = NULL; |
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3088 } |
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3089 } else { |
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3090 char* const start_aligned = (char*) align_ptr_up(start, alignment); |
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3091 char* const end_aligned = start_aligned + bytes; |
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3092 char* const end = start + extra_size; |
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3093 if (start_aligned > start) { |
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3094 ::munmap(start, start_aligned - start); |
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3095 } |
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3096 if (end_aligned < end) { |
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3097 ::munmap(end_aligned, end - end_aligned); |
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3098 } |
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3099 start = start_aligned; |
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3100 } |
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3101 } |
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3102 return start; |
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3103 } |
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3104 |
0 | 3105 // Don't update _highest_vm_reserved_address, because there might be memory |
3106 // regions above addr + size. If so, releasing a memory region only creates | |
3107 // a hole in the address space, it doesn't help prevent heap-stack collision. | |
3108 // | |
3109 static int anon_munmap(char * addr, size_t size) { | |
3110 return ::munmap(addr, size) == 0; | |
3111 } | |
3112 | |
6197 | 3113 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
0 | 3114 size_t alignment_hint) { |
3115 return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); | |
3116 } | |
3117 | |
6197 | 3118 bool os::pd_release_memory(char* addr, size_t size) { |
0 | 3119 return anon_munmap(addr, size); |
3120 } | |
3121 | |
3122 static address highest_vm_reserved_address() { | |
3123 return _highest_vm_reserved_address; | |
3124 } | |
3125 | |
3126 static bool linux_mprotect(char* addr, size_t size, int prot) { | |
3127 // Linux wants the mprotect address argument to be page aligned. | |
3128 char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size()); | |
3129 | |
3130 // According to SUSv3, mprotect() should only be used with mappings | |
3131 // established by mmap(), and mmap() always maps whole pages. Unaligned | |
3132 // 'addr' likely indicates problem in the VM (e.g. trying to change | |
3133 // protection of malloc'ed or statically allocated memory). Check the | |
3134 // caller if you hit this assert. | |
3135 assert(addr == bottom, "sanity check"); | |
3136 | |
3137 size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size()); | |
3138 return ::mprotect(bottom, size, prot) == 0; | |
3139 } | |
3140 | |
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3141 // Set protections specified |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3142 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
|
3143 bool is_committed) { |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3144 unsigned int p = 0; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3145 switch (prot) { |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3146 case MEM_PROT_NONE: p = PROT_NONE; break; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3147 case MEM_PROT_READ: p = PROT_READ; break; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3148 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3149 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
|
3150 default: |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3151 ShouldNotReachHere(); |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3152 } |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3153 // is_committed is unused. |
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3154 return linux_mprotect(addr, bytes, p); |
0 | 3155 } |
3156 | |
3157 bool os::guard_memory(char* addr, size_t size) { | |
3158 return linux_mprotect(addr, size, PROT_NONE); | |
3159 } | |
3160 | |
3161 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
|
3162 return linux_mprotect(addr, size, PROT_READ|PROT_WRITE); |
0 | 3163 } |
3164 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3165 bool os::Linux::transparent_huge_pages_sanity_check(bool warn, size_t page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3166 bool result = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3167 void *p = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3168 MAP_ANONYMOUS|MAP_PRIVATE, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3169 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3170 if (p != MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3171 void *aligned_p = align_ptr_up(p, page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3172 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3173 result = madvise(aligned_p, page_size, MADV_HUGEPAGE) == 0; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3174 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3175 munmap(p, page_size * 2); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3176 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3177 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3178 if (warn && !result) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3179 warning("TransparentHugePages is not supported by the operating system."); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3180 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3181 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3182 return result; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3183 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3184 |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3185 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
|
3186 bool result = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3187 void *p = mmap(NULL, page_size, PROT_READ|PROT_WRITE, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3188 MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3189 -1, 0); |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3190 |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3191 if (p != MAP_FAILED) { |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3192 // 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
|
3193 FILE *fp = fopen("/proc/self/maps", "r"); |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3194 if (fp) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3195 while (!feof(fp)) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3196 char chars[257]; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3197 long x = 0; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3198 if (fgets(chars, sizeof(chars), fp)) { |
3358 | 3199 if (sscanf(chars, "%lx-%*x", &x) == 1 |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3200 && x == (long)p) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3201 if (strstr (chars, "hugepage")) { |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3202 result = true; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3203 break; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3204 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3205 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3206 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3207 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3208 fclose(fp); |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3209 } |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3210 munmap(p, page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3211 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3212 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3213 if (warn && !result) { |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3214 warning("HugeTLBFS is not supported by the operating system."); |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3215 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3216 |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3217 return result; |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3218 } |
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3219 |
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3220 /* |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3221 * 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
|
3222 * |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3223 * From the coredump_filter documentation: |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3224 * |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3225 * - (bit 0) anonymous private memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3226 * - (bit 1) anonymous shared memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3227 * - (bit 2) file-backed private memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3228 * - (bit 3) file-backed shared memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3229 * - (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
|
3230 * effective only if the bit 2 is cleared) |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3231 * - (bit 5) hugetlb private memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3232 * - (bit 6) hugetlb shared memory |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3233 */ |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3234 static void set_coredump_filter(void) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3235 FILE *f; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3236 long cdm; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3237 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3238 if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3239 return; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3240 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3241 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3242 if (fscanf(f, "%lx", &cdm) != 1) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3243 fclose(f); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3244 return; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3245 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3246 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3247 rewind(f); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3248 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3249 if ((cdm & LARGEPAGES_BIT) == 0) { |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3250 cdm |= LARGEPAGES_BIT; |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3251 fprintf(f, "%#lx", cdm); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3252 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3253 |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3254 fclose(f); |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3255 } |
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3256 |
0 | 3257 // Large page support |
3258 | |
3259 static size_t _large_page_size = 0; | |
3260 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3261 size_t os::Linux::find_large_page_size() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3262 size_t large_page_size = 0; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3263 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3264 // large_page_size on Linux is used to round up heap size. x86 uses either |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3265 // 2M or 4M page, depending on whether PAE (Physical Address Extensions) |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3266 // mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. IA64 can use |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3267 // page as large as 256M. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3268 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3269 // Here we try to figure out page size by parsing /proc/meminfo and looking |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3270 // for a line with the following format: |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3271 // Hugepagesize: 2048 kB |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3272 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3273 // If we can't determine the value (e.g. /proc is not mounted, or the text |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3274 // format has been changed), we'll use the largest page size supported by |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3275 // the processor. |
0 | 3276 |
1010 | 3277 #ifndef ZERO |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3278 large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M) |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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11092
diff
changeset
|
3279 ARM_ONLY(2 * M) PPC_ONLY(4 * M); |
1010 | 3280 #endif // ZERO |
0 | 3281 |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3282 FILE *fp = fopen("/proc/meminfo", "r"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3283 if (fp) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3284 while (!feof(fp)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3285 int x = 0; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3286 char buf[16]; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3287 if (fscanf(fp, "Hugepagesize: %d", &x) == 1) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3288 if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3289 large_page_size = x * K; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3290 break; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3291 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3292 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3293 // skip to next line |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3294 for (;;) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3295 int ch = fgetc(fp); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3296 if (ch == EOF || ch == (int)'\n') break; |
0 | 3297 } |
3298 } | |
3299 } | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3300 fclose(fp); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3301 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3302 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3303 if (!FLAG_IS_DEFAULT(LargePageSizeInBytes) && LargePageSizeInBytes != large_page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3304 warning("Setting LargePageSizeInBytes has no effect on this OS. Large page size is " |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3305 SIZE_FORMAT "%s.", byte_size_in_proper_unit(large_page_size), |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3306 proper_unit_for_byte_size(large_page_size)); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3307 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3308 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3309 return large_page_size; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3310 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3311 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3312 size_t os::Linux::setup_large_page_size() { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3313 _large_page_size = Linux::find_large_page_size(); |
0 | 3314 const size_t default_page_size = (size_t)Linux::page_size(); |
3315 if (_large_page_size > default_page_size) { | |
3316 _page_sizes[0] = _large_page_size; | |
3317 _page_sizes[1] = default_page_size; | |
3318 _page_sizes[2] = 0; | |
3319 } | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3320 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3321 return _large_page_size; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3322 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3323 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3324 bool os::Linux::setup_large_page_type(size_t page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3325 if (FLAG_IS_DEFAULT(UseHugeTLBFS) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3326 FLAG_IS_DEFAULT(UseSHM) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3327 FLAG_IS_DEFAULT(UseTransparentHugePages)) { |
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3328 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3329 // The type of large pages has not been specified by the user. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3330 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3331 // Try UseHugeTLBFS and then UseSHM. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3332 UseHugeTLBFS = UseSHM = true; |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3333 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3334 // Don't try UseTransparentHugePages since there are known |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3335 // performance issues with it turned on. This might change in the future. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3336 UseTransparentHugePages = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3337 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3338 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3339 if (UseTransparentHugePages) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3340 bool warn_on_failure = !FLAG_IS_DEFAULT(UseTransparentHugePages); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3341 if (transparent_huge_pages_sanity_check(warn_on_failure, page_size)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3342 UseHugeTLBFS = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3343 UseSHM = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3344 return true; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3345 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3346 UseTransparentHugePages = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3347 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3348 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3349 if (UseHugeTLBFS) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3350 bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3351 if (hugetlbfs_sanity_check(warn_on_failure, page_size)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3352 UseSHM = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3353 return true; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3354 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3355 UseHugeTLBFS = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3356 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3357 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3358 return UseSHM; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3359 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3360 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3361 void os::large_page_init() { |
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3362 if (!UseLargePages && |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3363 !UseTransparentHugePages && |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3364 !UseHugeTLBFS && |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3365 !UseSHM) { |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3366 // Not using large pages. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3367 return; |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3368 } |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3369 |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3370 if (!FLAG_IS_DEFAULT(UseLargePages) && !UseLargePages) { |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3371 // The user explicitly turned off large pages. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3372 // Ignore the rest of the large pages flags. |
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3373 UseTransparentHugePages = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3374 UseHugeTLBFS = false; |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3375 UseSHM = false; |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3376 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3377 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3378 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3379 size_t large_page_size = Linux::setup_large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3380 UseLargePages = Linux::setup_large_page_type(large_page_size); |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3381 |
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3382 set_coredump_filter(); |
0 | 3383 } |
3384 | |
3385 #ifndef SHM_HUGETLB | |
3386 #define SHM_HUGETLB 04000 | |
3387 #endif | |
3388 | |
24007
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3389 #define shm_warning_format(format, ...) \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3390 do { \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3391 if (UseLargePages && \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3392 (!FLAG_IS_DEFAULT(UseLargePages) || \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3393 !FLAG_IS_DEFAULT(UseSHM) || \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3394 !FLAG_IS_DEFAULT(LargePageSizeInBytes))) { \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
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diff
changeset
|
3395 warning(format, __VA_ARGS__); \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3396 } \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3397 } while (0) |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3398 |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3399 #define shm_warning(str) shm_warning_format("%s", str) |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
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diff
changeset
|
3400 |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3401 #define shm_warning_with_errno(str) \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3402 do { \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3403 int err = errno; \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3404 shm_warning_format(str " (error = %d)", err); \ |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3405 } while (0) |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3406 |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3407 static char* shmat_with_alignment(int shmid, size_t bytes, size_t alignment) { |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3408 assert(is_size_aligned(bytes, alignment), "Must be divisible by the alignment"); |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
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diff
changeset
|
3409 |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3410 if (!is_size_aligned(alignment, SHMLBA)) { |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
stefank
parents:
24006
diff
changeset
|
3411 assert(false, "Code below assumes that alignment is at least SHMLBA aligned"); |
776cb7cbe2e4
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3412 return NULL; |
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3413 } |
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3414 |
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3415 // To ensure that we get 'alignment' aligned memory from shmat, |
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3416 // we pre-reserve aligned virtual memory and then attach to that. |
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3417 |
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3418 char* pre_reserved_addr = anon_mmap_aligned(bytes, alignment, NULL); |
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3419 if (pre_reserved_addr == NULL) { |
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3420 // Couldn't pre-reserve aligned memory. |
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3421 shm_warning("Failed to pre-reserve aligned memory for shmat."); |
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3422 return NULL; |
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3423 } |
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3424 |
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3425 // SHM_REMAP is needed to allow shmat to map over an existing mapping. |
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3426 char* addr = (char*)shmat(shmid, pre_reserved_addr, SHM_REMAP); |
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3427 |
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3428 if ((intptr_t)addr == -1) { |
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3429 int err = errno; |
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3430 shm_warning_with_errno("Failed to attach shared memory."); |
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3431 |
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3432 assert(err != EACCES, "Unexpected error"); |
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3433 assert(err != EIDRM, "Unexpected error"); |
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3434 assert(err != EINVAL, "Unexpected error"); |
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3435 |
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3436 // Since we don't know if the kernel unmapped the pre-reserved memory area |
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3437 // we can't unmap it, since that would potentially unmap memory that was |
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3438 // mapped from other threads. |
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3439 return NULL; |
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3440 } |
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3441 |
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3442 return addr; |
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3443 } |
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3444 |
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3445 static char* shmat_at_address(int shmid, char* req_addr) { |
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3446 if (!is_ptr_aligned(req_addr, SHMLBA)) { |
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3447 assert(false, "Requested address needs to be SHMLBA aligned"); |
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3448 return NULL; |
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3449 } |
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3450 |
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3451 char* addr = (char*)shmat(shmid, req_addr, 0); |
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3452 |
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3453 if ((intptr_t)addr == -1) { |
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3454 shm_warning_with_errno("Failed to attach shared memory."); |
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3455 return NULL; |
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3456 } |
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3457 |
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3458 return addr; |
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3459 } |
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3460 |
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3461 static char* shmat_large_pages(int shmid, size_t bytes, size_t alignment, char* req_addr) { |
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3462 // If a req_addr has been provided, we assume that the caller has already aligned the address. |
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3463 if (req_addr != NULL) { |
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3464 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Must be divisible by the large page size"); |
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3465 assert(is_ptr_aligned(req_addr, alignment), "Must be divisible by given alignment"); |
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3466 return shmat_at_address(shmid, req_addr); |
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3467 } |
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3468 |
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3469 // Since shmid has been setup with SHM_HUGETLB, shmat will automatically |
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3470 // return large page size aligned memory addresses when req_addr == NULL. |
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3471 // However, if the alignment is larger than the large page size, we have |
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3472 // to manually ensure that the memory returned is 'alignment' aligned. |
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3473 if (alignment > os::large_page_size()) { |
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3474 assert(is_size_aligned(alignment, os::large_page_size()), "Must be divisible by the large page size"); |
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3475 return shmat_with_alignment(shmid, bytes, alignment); |
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3476 } else { |
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3477 return shmat_at_address(shmid, NULL); |
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3478 } |
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3479 } |
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3480 |
12110
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3481 char* os::Linux::reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
656 | 3482 // "exec" is passed in but not used. Creating the shared image for |
3483 // the code cache doesn't have an SHM_X executable permission to check. | |
3286
139667d9836a
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3484 assert(UseLargePages && UseSHM, "only for SHM large pages"); |
12110
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3485 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
24007
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3486 assert(is_ptr_aligned(req_addr, alignment), "Unaligned address"); |
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3487 |
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3488 if (!is_size_aligned(bytes, os::large_page_size())) { |
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3489 return NULL; // Fallback to small pages. |
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3490 } |
0 | 3491 |
3492 // Create a large shared memory region to attach to based on size. | |
24007
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3493 // Currently, size is the total size of the heap. |
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3494 int shmid = shmget(IPC_PRIVATE, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); |
0 | 3495 if (shmid == -1) { |
24007
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3496 // Possible reasons for shmget failure: |
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3497 // 1. shmmax is too small for Java heap. |
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3498 // > check shmmax value: cat /proc/sys/kernel/shmmax |
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3499 // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax |
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3500 // 2. not enough large page memory. |
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3501 // > check available large pages: cat /proc/meminfo |
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3502 // > increase amount of large pages: |
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3503 // echo new_value > /proc/sys/vm/nr_hugepages |
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3504 // Note 1: different Linux may use different name for this property, |
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3505 // e.g. on Redhat AS-3 it is "hugetlb_pool". |
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3506 // Note 2: it's possible there's enough physical memory available but |
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3507 // they are so fragmented after a long run that they can't |
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3508 // coalesce into large pages. Try to reserve large pages when |
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3509 // the system is still "fresh". |
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3510 shm_warning_with_errno("Failed to reserve shared memory."); |
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|
3511 return NULL; |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3512 } |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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diff
changeset
|
3513 |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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24006
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changeset
|
3514 // Attach to the region. |
776cb7cbe2e4
8017629: G1: UseSHM in combination with a G1HeapRegionSize > os::large_page_size() falls back to use small pages
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changeset
|
3515 char* addr = shmat_large_pages(shmid, bytes, alignment, req_addr); |
0 | 3516 |
3517 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
3518 // will be deleted when it's detached by shmdt() or when the process | |
3519 // terminates. If shmat() is not successful this will remove the shared | |
3520 // segment immediately. | |
3521 shmctl(shmid, IPC_RMID, NULL); | |
3522 | |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3523 return addr; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3524 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3525 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3526 static void warn_on_large_pages_failure(char* req_addr, size_t bytes, int error) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3527 assert(error == ENOMEM, "Only expect to fail if no memory is available"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3528 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3529 bool warn_on_failure = UseLargePages && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3530 (!FLAG_IS_DEFAULT(UseLargePages) || |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3531 !FLAG_IS_DEFAULT(UseHugeTLBFS) || |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3532 !FLAG_IS_DEFAULT(LargePageSizeInBytes)); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3533 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3534 if (warn_on_failure) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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11092
diff
changeset
|
3535 char msg[128]; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3536 jio_snprintf(msg, sizeof(msg), "Failed to reserve large pages memory req_addr: " |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3537 PTR_FORMAT " bytes: " SIZE_FORMAT " (errno = %d).", req_addr, bytes, error); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
3538 warning("%s", msg); |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3539 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3540 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3541 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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11092
diff
changeset
|
3542 char* os::Linux::reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3543 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3544 assert(is_size_aligned(bytes, os::large_page_size()), "Unaligned size"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3545 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3546 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3547 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3548 char* addr = (char*)::mmap(req_addr, bytes, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3549 MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3550 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3551 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3552 if (addr == MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3553 warn_on_large_pages_failure(req_addr, bytes, errno); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3554 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3555 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3556 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3557 assert(is_ptr_aligned(addr, os::large_page_size()), "Must be"); |
8711
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3558 |
0 | 3559 return addr; |
3560 } | |
3561 | |
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3562 // Reserve memory using mmap(MAP_HUGETLB). |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3563 // - bytes shall be a multiple of alignment. |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3564 // - req_addr can be NULL. If not NULL, it must be a multiple of alignment. |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
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diff
changeset
|
3565 // - alignment sets the alignment at which memory shall be allocated. |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3566 // It must be a multiple of allocation granularity. |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3567 // Returns address of memory or NULL. If req_addr was not NULL, will only return |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3568 // req_addr or NULL. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3569 char* os::Linux::reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3570 size_t large_page_size = os::large_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3571 assert(bytes >= large_page_size, "Shouldn't allocate large pages for small sizes"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3572 |
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3573 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3574 assert(is_size_aligned(bytes, alignment), "Must be"); |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3575 |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3576 // First reserve - but not commit - the address range in small pages. |
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3577 char* const start = anon_mmap_aligned(bytes, alignment, req_addr); |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3578 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3579 if (start == NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3580 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3581 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3582 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3583 assert(is_ptr_aligned(start, alignment), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3584 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3585 char* end = start + bytes; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3586 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3587 // Find the regions of the allocated chunk that can be promoted to large pages. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3588 char* lp_start = (char*)align_ptr_up(start, large_page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3589 char* lp_end = (char*)align_ptr_down(end, large_page_size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3590 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3591 size_t lp_bytes = lp_end - lp_start; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3592 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3593 assert(is_size_aligned(lp_bytes, large_page_size), "Must be"); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3594 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3595 if (lp_bytes == 0) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3596 // The mapped region doesn't even span the start and the end of a large page. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3597 // Fall back to allocate a non-special area. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3598 ::munmap(start, end - start); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3599 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3600 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3601 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3602 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3603 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3604 void* result; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3605 |
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3606 // Commit small-paged leading area. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3607 if (start != lp_start) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3608 result = ::mmap(start, lp_start - start, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3609 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3610 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3611 if (result == MAP_FAILED) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3612 ::munmap(lp_start, end - lp_start); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3613 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3614 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3615 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3616 |
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
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23822
diff
changeset
|
3617 // Commit large-paged area. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3618 result = ::mmap(lp_start, lp_bytes, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3619 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_HUGETLB, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3620 -1, 0); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3621 if (result == MAP_FAILED) { |
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3622 warn_on_large_pages_failure(lp_start, lp_bytes, errno); |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3623 // If the mmap above fails, the large pages region will be unmapped and we |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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changeset
|
3624 // have regions before and after with small pages. Release these regions. |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3625 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3626 // | mapped | unmapped | mapped | |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3627 // ^ ^ ^ ^ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3628 // start lp_start lp_end end |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3629 // |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3630 ::munmap(start, lp_start - start); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3631 ::munmap(lp_end, end - lp_end); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3632 return NULL; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3633 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3634 |
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
23822
diff
changeset
|
3635 // Commit small-paged trailing area. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3636 if (lp_end != end) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3637 result = ::mmap(lp_end, end - lp_end, prot, |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3638 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
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|
3639 -1, 0); |
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|
3640 if (result == MAP_FAILED) { |
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|
3641 ::munmap(start, lp_end - start); |
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|
3642 return NULL; |
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|
3643 } |
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|
3644 } |
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|
3645 |
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|
3646 return start; |
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|
3647 } |
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changeset
|
3648 |
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|
3649 char* os::Linux::reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
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|
3650 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
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|
3651 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
24006
44c8fe602a5e
8077276: allocating heap with UseLargePages and HugeTLBFS may trash existing memory mappings (linux)
stuefe
parents:
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diff
changeset
|
3652 assert(is_size_aligned(alignment, os::vm_allocation_granularity()), "Must be"); |
12110
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3653 assert(is_power_of_2(os::large_page_size()), "Must be"); |
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|
3654 assert(bytes >= os::large_page_size(), "Shouldn't allocate large pages for small sizes"); |
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|
3655 |
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|
3656 if (is_size_aligned(bytes, os::large_page_size()) && alignment <= os::large_page_size()) { |
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|
3657 return reserve_memory_special_huge_tlbfs_only(bytes, req_addr, exec); |
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|
3658 } else { |
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|
3659 return reserve_memory_special_huge_tlbfs_mixed(bytes, alignment, req_addr, exec); |
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|
3660 } |
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|
3661 } |
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changeset
|
3662 |
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|
3663 char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
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|
3664 assert(UseLargePages, "only for large pages"); |
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|
3665 |
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changeset
|
3666 char* addr; |
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changeset
|
3667 if (UseSHM) { |
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changeset
|
3668 addr = os::Linux::reserve_memory_special_shm(bytes, alignment, req_addr, exec); |
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|
3669 } else { |
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changeset
|
3670 assert(UseHugeTLBFS, "must be"); |
4c84d351cca9
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changeset
|
3671 addr = os::Linux::reserve_memory_special_huge_tlbfs(bytes, alignment, req_addr, exec); |
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|
3672 } |
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diff
changeset
|
3673 |
4c84d351cca9
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diff
changeset
|
3674 if (addr != NULL) { |
4c84d351cca9
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changeset
|
3675 if (UseNUMAInterleaving) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
3676 numa_make_global(addr, bytes); |
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changeset
|
3677 } |
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changeset
|
3678 |
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changeset
|
3679 // The memory is committed |
20360 | 3680 MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, CALLER_PC); |
12110
4c84d351cca9
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changeset
|
3681 } |
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diff
changeset
|
3682 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3683 return addr; |
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diff
changeset
|
3684 } |
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changeset
|
3685 |
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changeset
|
3686 bool os::Linux::release_memory_special_shm(char* base, size_t bytes) { |
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changeset
|
3687 // detaching the SHM segment will also delete it, see reserve_memory_special_shm() |
4c84d351cca9
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changeset
|
3688 return shmdt(base) == 0; |
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diff
changeset
|
3689 } |
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changeset
|
3690 |
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changeset
|
3691 bool os::Linux::release_memory_special_huge_tlbfs(char* base, size_t bytes) { |
4c84d351cca9
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changeset
|
3692 return pd_release_memory(base, bytes); |
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diff
changeset
|
3693 } |
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changeset
|
3694 |
0 | 3695 bool os::release_memory_special(char* base, size_t bytes) { |
20360 | 3696 bool res; |
3697 if (MemTracker::tracking_level() > NMT_minimal) { | |
3698 Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); | |
3699 res = os::Linux::release_memory_special_impl(base, bytes); | |
3700 if (res) { | |
3701 tkr.record((address)base, bytes); | |
3702 } | |
3703 | |
3704 } else { | |
3705 res = os::Linux::release_memory_special_impl(base, bytes); | |
3706 } | |
3707 return res; | |
3708 } | |
3709 | |
3710 bool os::Linux::release_memory_special_impl(char* base, size_t bytes) { | |
12110
4c84d351cca9
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|
3711 assert(UseLargePages, "only for large pages"); |
4c84d351cca9
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changeset
|
3712 bool res; |
20360 | 3713 |
12110
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changeset
|
3714 if (UseSHM) { |
4c84d351cca9
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diff
changeset
|
3715 res = os::Linux::release_memory_special_shm(base, bytes); |
4c84d351cca9
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changeset
|
3716 } else { |
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changeset
|
3717 assert(UseHugeTLBFS, "must be"); |
4c84d351cca9
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changeset
|
3718 res = os::Linux::release_memory_special_huge_tlbfs(base, bytes); |
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changeset
|
3719 } |
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changeset
|
3720 return res; |
0 | 3721 } |
3722 | |
3723 size_t os::large_page_size() { | |
3724 return _large_page_size; | |
3725 } | |
3726 | |
12110
4c84d351cca9
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changeset
|
3727 // With SysV SHM the entire memory region must be allocated as shared |
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3728 // memory. |
12110
4c84d351cca9
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changeset
|
3729 // HugeTLBFS allows application to commit large page memory on demand. |
4c84d351cca9
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changeset
|
3730 // However, when committing memory with HugeTLBFS fails, the region |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3731 // that was supposed to be committed will lose the old reservation |
4c84d351cca9
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changeset
|
3732 // and allow other threads to steal that memory region. Because of this |
4c84d351cca9
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changeset
|
3733 // behavior we can't commit HugeTLBFS memory. |
0 | 3734 bool os::can_commit_large_page_memory() { |
12110
4c84d351cca9
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changeset
|
3735 return UseTransparentHugePages; |
0 | 3736 } |
3737 | |
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3738 bool os::can_execute_large_page_memory() { |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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changeset
|
3739 return UseTransparentHugePages || UseHugeTLBFS; |
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3740 } |
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
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parents:
62
diff
changeset
|
3741 |
0 | 3742 // Reserve memory at an arbitrary address, only if that area is |
3743 // available (and not reserved for something else). | |
3744 | |
6197 | 3745 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
0 | 3746 const int max_tries = 10; |
3747 char* base[max_tries]; | |
3748 size_t size[max_tries]; | |
3749 const size_t gap = 0x000000; | |
3750 | |
3751 // Assert only that the size is a multiple of the page size, since | |
3752 // that's all that mmap requires, and since that's all we really know | |
3753 // about at this low abstraction level. If we need higher alignment, | |
3754 // we can either pass an alignment to this method or verify alignment | |
3755 // in one of the methods further up the call chain. See bug 5044738. | |
3756 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
3757 | |
3758 // Repeatedly allocate blocks until the block is allocated at the | |
3759 // right spot. Give up after max_tries. Note that reserve_memory() will | |
3760 // automatically update _highest_vm_reserved_address if the call is | |
3761 // successful. The variable tracks the highest memory address every reserved | |
3762 // by JVM. It is used to detect heap-stack collision if running with | |
3763 // fixed-stack LinuxThreads. Because here we may attempt to reserve more | |
3764 // space than needed, it could confuse the collision detecting code. To | |
3765 // solve the problem, save current _highest_vm_reserved_address and | |
3766 // calculate the correct value before return. | |
3767 address old_highest = _highest_vm_reserved_address; | |
3768 | |
3769 // Linux mmap allows caller to pass an address as hint; give it a try first, | |
3770 // if kernel honors the hint then we can return immediately. | |
3771 char * addr = anon_mmap(requested_addr, bytes, false); | |
3772 if (addr == requested_addr) { | |
3773 return requested_addr; | |
3774 } | |
3775 | |
3776 if (addr != NULL) { | |
3777 // mmap() is successful but it fails to reserve at the requested address | |
3778 anon_munmap(addr, bytes); | |
3779 } | |
3780 | |
3781 int i; | |
3782 for (i = 0; i < max_tries; ++i) { | |
3783 base[i] = reserve_memory(bytes); | |
3784 | |
3785 if (base[i] != NULL) { | |
3786 // Is this the block we wanted? | |
3787 if (base[i] == requested_addr) { | |
3788 size[i] = bytes; | |
3789 break; | |
3790 } | |
3791 | |
3792 // Does this overlap the block we wanted? Give back the overlapped | |
3793 // parts and try again. | |
3794 | |
3795 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
3796 if (top_overlap >= 0 && top_overlap < bytes) { | |
3797 unmap_memory(base[i], top_overlap); | |
3798 base[i] += top_overlap; | |
3799 size[i] = bytes - top_overlap; | |
3800 } else { | |
3801 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
3802 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
3803 unmap_memory(requested_addr, bottom_overlap); | |
3804 size[i] = bytes - bottom_overlap; | |
3805 } else { | |
3806 size[i] = bytes; | |
3807 } | |
3808 } | |
3809 } | |
3810 } | |
3811 | |
3812 // Give back the unused reserved pieces. | |
3813 | |
3814 for (int j = 0; j < i; ++j) { | |
3815 if (base[j] != NULL) { | |
3816 unmap_memory(base[j], size[j]); | |
3817 } | |
3818 } | |
3819 | |
3820 if (i < max_tries) { | |
3821 _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); | |
3822 return requested_addr; | |
3823 } else { | |
3824 _highest_vm_reserved_address = old_highest; | |
3825 return NULL; | |
3826 } | |
3827 } | |
3828 | |
3829 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
3830 return ::read(fd, buf, nBytes); | |
3831 } | |
3832 | |
3833 // TODO-FIXME: reconcile Solaris' os::sleep with the linux variation. | |
3834 // Solaris uses poll(), linux uses park(). | |
3835 // Poll() is likely a better choice, assuming that Thread.interrupt() | |
3836 // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with | |
3837 // SIGSEGV, see 4355769. | |
3838 | |
3839 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
3840 assert(thread == Thread::current(), "thread consistency check"); | |
3841 | |
3842 ParkEvent * const slp = thread->_SleepEvent ; | |
3843 slp->reset() ; | |
3844 OrderAccess::fence() ; | |
3845 | |
3846 if (interruptible) { | |
3847 jlong prevtime = javaTimeNanos(); | |
3848 | |
3849 for (;;) { | |
3850 if (os::is_interrupted(thread, true)) { | |
3851 return OS_INTRPT; | |
3852 } | |
3853 | |
3854 jlong newtime = javaTimeNanos(); | |
3855 | |
3856 if (newtime - prevtime < 0) { | |
3857 // time moving backwards, should only happen if no monotonic clock | |
3858 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
3859 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
3860 } else { | |
4712
e7dead7e90af
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parents:
4082
diff
changeset
|
3861 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
0 | 3862 } |
3863 | |
3864 if(millis <= 0) { | |
3865 return OS_OK; | |
3866 } | |
3867 | |
3868 prevtime = newtime; | |
3869 | |
3870 { | |
3871 assert(thread->is_Java_thread(), "sanity check"); | |
3872 JavaThread *jt = (JavaThread *) thread; | |
3873 ThreadBlockInVM tbivm(jt); | |
3874 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
3875 | |
3876 jt->set_suspend_equivalent(); | |
3877 // cleared by handle_special_suspend_equivalent_condition() or | |
3878 // java_suspend_self() via check_and_wait_while_suspended() | |
3879 | |
3880 slp->park(millis); | |
3881 | |
3882 // were we externally suspended while we were waiting? | |
3883 jt->check_and_wait_while_suspended(); | |
3884 } | |
3885 } | |
3886 } else { | |
3887 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
3888 jlong prevtime = javaTimeNanos(); | |
3889 | |
3890 for (;;) { | |
3891 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on | |
3892 // the 1st iteration ... | |
3893 jlong newtime = javaTimeNanos(); | |
3894 | |
3895 if (newtime - prevtime < 0) { | |
3896 // time moving backwards, should only happen if no monotonic clock | |
3897 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
3898 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
3899 } else { | |
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3900 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
0 | 3901 } |
3902 | |
3903 if(millis <= 0) break ; | |
3904 | |
3905 prevtime = newtime; | |
3906 slp->park(millis); | |
3907 } | |
3908 return OS_OK ; | |
3909 } | |
3910 } | |
3911 | |
14291
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
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14286
diff
changeset
|
3912 // |
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
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14286
diff
changeset
|
3913 // Short sleep, direct OS call. |
5944dba4badc
8028280: ParkEvent leak when running modified runThese which only loads classes
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3914 // |
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3915 // Note: certain versions of Linux CFS scheduler (since 2.6.23) do not guarantee |
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3916 // sched_yield(2) will actually give up the CPU: |
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3917 // |
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3918 // * Alone on this pariticular CPU, keeps running. |
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3919 // * Before the introduction of "skip_buddy" with "compat_yield" disabled |
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3920 // (pre 2.6.39). |
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3921 // |
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3922 // So calling this with 0 is an alternative. |
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3923 // |
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3924 void os::naked_short_sleep(jlong ms) { |
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3925 struct timespec req; |
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3926 |
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3927 assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
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3928 req.tv_sec = 0; |
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3929 if (ms > 0) { |
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3930 req.tv_nsec = (ms % 1000) * 1000000; |
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3931 } |
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3932 else { |
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3933 req.tv_nsec = 1; |
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3934 } |
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3935 |
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3936 nanosleep(&req, NULL); |
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3937 |
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3938 return; |
0 | 3939 } |
3940 | |
3941 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
3942 void os::infinite_sleep() { | |
3943 while (true) { // sleep forever ... | |
3944 ::sleep(100); // ... 100 seconds at a time | |
3945 } | |
3946 } | |
3947 | |
3948 // Used to convert frequent JVM_Yield() to nops | |
3949 bool os::dont_yield() { | |
3950 return DontYieldALot; | |
3951 } | |
3952 | |
3953 void os::yield() { | |
3954 sched_yield(); | |
3955 } | |
3956 | |
3957 os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} | |
3958 | |
3959 void os::yield_all(int attempts) { | |
3960 // Yields to all threads, including threads with lower priorities | |
3961 // Threads on Linux are all with same priority. The Solaris style | |
3962 // os::yield_all() with nanosleep(1ms) is not necessary. | |
3963 sched_yield(); | |
3964 } | |
3965 | |
3966 // Called from the tight loops to possibly influence time-sharing heuristics | |
3967 void os::loop_breaker(int attempts) { | |
3968 os::yield_all(attempts); | |
3969 } | |
3970 | |
3971 //////////////////////////////////////////////////////////////////////////////// | |
3972 // thread priority support | |
3973 | |
3974 // Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER | |
3975 // only supports dynamic priority, static priority must be zero. For real-time | |
3976 // applications, Linux supports SCHED_RR which allows static priority (1-99). | |
3977 // However, for large multi-threaded applications, SCHED_RR is not only slower | |
3978 // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out | |
3979 // of 5 runs - Sep 2005). | |
3980 // | |
3981 // The following code actually changes the niceness of kernel-thread/LWP. It | |
3982 // has an assumption that setpriority() only modifies one kernel-thread/LWP, | |
3983 // not the entire user process, and user level threads are 1:1 mapped to kernel | |
3984 // threads. It has always been the case, but could change in the future. For | |
3985 // this reason, the code should not be used as default (ThreadPriorityPolicy=0). | |
3986 // It is only used when ThreadPriorityPolicy=1 and requires root privilege. | |
3987 | |
4854
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3988 int os::java_to_os_priority[CriticalPriority + 1] = { |
0 | 3989 19, // 0 Entry should never be used |
3990 | |
3991 4, // 1 MinPriority | |
3992 3, // 2 | |
3993 2, // 3 | |
3994 | |
3995 1, // 4 | |
3996 0, // 5 NormPriority | |
3997 -1, // 6 | |
3998 | |
3999 -2, // 7 | |
4000 -3, // 8 | |
4001 -4, // 9 NearMaxPriority | |
4002 | |
4854
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4003 -5, // 10 MaxPriority |
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4004 |
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4005 -5 // 11 CriticalPriority |
0 | 4006 }; |
4007 | |
4008 static int prio_init() { | |
4009 if (ThreadPriorityPolicy == 1) { | |
4010 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 | |
4011 // if effective uid is not root. Perhaps, a more elegant way of doing | |
4012 // this is to test CAP_SYS_NICE capability, but that will require libcap.so | |
4013 if (geteuid() != 0) { | |
4014 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { | |
4015 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); | |
4016 } | |
4017 ThreadPriorityPolicy = 0; | |
4018 } | |
4019 } | |
4854
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4020 if (UseCriticalJavaThreadPriority) { |
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4021 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
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4022 } |
0 | 4023 return 0; |
4024 } | |
4025 | |
4026 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
4027 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; | |
4028 | |
4029 int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); | |
4030 return (ret == 0) ? OS_OK : OS_ERR; | |
4031 } | |
4032 | |
4033 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
4034 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { | |
4035 *priority_ptr = java_to_os_priority[NormPriority]; | |
4036 return OS_OK; | |
4037 } | |
4038 | |
4039 errno = 0; | |
4040 *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); | |
4041 return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); | |
4042 } | |
4043 | |
4044 // Hint to the underlying OS that a task switch would not be good. | |
4045 // Void return because it's a hint and can fail. | |
4046 void os::hint_no_preempt() {} | |
4047 | |
4048 //////////////////////////////////////////////////////////////////////////////// | |
4049 // suspend/resume support | |
4050 | |
4051 // the low-level signal-based suspend/resume support is a remnant from the | |
4052 // old VM-suspension that used to be for java-suspension, safepoints etc, | |
4053 // within hotspot. Now there is a single use-case for this: | |
4054 // - calling get_thread_pc() on the VMThread by the flat-profiler task | |
4055 // that runs in the watcher thread. | |
4056 // The remaining code is greatly simplified from the more general suspension | |
4057 // code that used to be used. | |
4058 // | |
4059 // The protocol is quite simple: | |
4060 // - suspend: | |
4061 // - sends a signal to the target thread | |
4062 // - polls the suspend state of the osthread using a yield loop | |
4063 // - target thread signal handler (SR_handler) sets suspend state | |
4064 // and blocks in sigsuspend until continued | |
4065 // - resume: | |
4066 // - sets target osthread state to continue | |
4067 // - sends signal to end the sigsuspend loop in the SR_handler | |
4068 // | |
4069 // Note that the SR_lock plays no role in this suspend/resume protocol. | |
4070 // | |
4071 | |
4072 static void resume_clear_context(OSThread *osthread) { | |
4073 osthread->set_ucontext(NULL); | |
4074 osthread->set_siginfo(NULL); | |
4075 } | |
4076 | |
4077 static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { | |
4078 osthread->set_ucontext(context); | |
4079 osthread->set_siginfo(siginfo); | |
4080 } | |
4081 | |
4082 // | |
4083 // Handler function invoked when a thread's execution is suspended or | |
4084 // resumed. We have to be careful that only async-safe functions are | |
4085 // called here (Note: most pthread functions are not async safe and | |
4086 // should be avoided.) | |
4087 // | |
4088 // Note: sigwait() is a more natural fit than sigsuspend() from an | |
4089 // interface point of view, but sigwait() prevents the signal hander | |
4090 // from being run. libpthread would get very confused by not having | |
4091 // its signal handlers run and prevents sigwait()'s use with the | |
4092 // mutex granting granting signal. | |
4093 // | |
10405 | 4094 // Currently only ever called on the VMThread and JavaThreads (PC sampling) |
0 | 4095 // |
4096 static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { | |
4097 // Save and restore errno to avoid confusing native code with EINTR | |
4098 // after sigsuspend. | |
4099 int old_errno = errno; | |
4100 | |
4101 Thread* thread = Thread::current(); | |
4102 OSThread* osthread = thread->osthread(); | |
10405 | 4103 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
4104 | |
4105 os::SuspendResume::State current = osthread->sr.state(); | |
4106 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { | |
0 | 4107 suspend_save_context(osthread, siginfo, context); |
4108 | |
10405 | 4109 // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
4110 os::SuspendResume::State state = osthread->sr.suspended(); | |
4111 if (state == os::SuspendResume::SR_SUSPENDED) { | |
4112 sigset_t suspend_set; // signals for sigsuspend() | |
4113 | |
4114 // get current set of blocked signals and unblock resume signal | |
4115 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); | |
4116 sigdelset(&suspend_set, SR_signum); | |
4117 | |
4118 sr_semaphore.signal(); | |
4119 // wait here until we are resumed | |
4120 while (1) { | |
4121 sigsuspend(&suspend_set); | |
4122 | |
4123 os::SuspendResume::State result = osthread->sr.running(); | |
4124 if (result == os::SuspendResume::SR_RUNNING) { | |
4125 sr_semaphore.signal(); | |
4126 break; | |
4127 } | |
4128 } | |
4129 | |
4130 } else if (state == os::SuspendResume::SR_RUNNING) { | |
4131 // request was cancelled, continue | |
4132 } else { | |
4133 ShouldNotReachHere(); | |
4134 } | |
0 | 4135 |
4136 resume_clear_context(osthread); | |
10405 | 4137 } else if (current == os::SuspendResume::SR_RUNNING) { |
4138 // request was cancelled, continue | |
4139 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { | |
4140 // ignore | |
0 | 4141 } else { |
10405 | 4142 // ignore |
0 | 4143 } |
4144 | |
4145 errno = old_errno; | |
4146 } | |
4147 | |
4148 | |
4149 static int SR_initialize() { | |
4150 struct sigaction act; | |
4151 char *s; | |
4152 /* Get signal number to use for suspend/resume */ | |
4153 if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { | |
4154 int sig = ::strtol(s, 0, 10); | |
4155 if (sig > 0 || sig < _NSIG) { | |
4156 SR_signum = sig; | |
4157 } | |
4158 } | |
4159 | |
4160 assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, | |
4161 "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); | |
4162 | |
4163 sigemptyset(&SR_sigset); | |
4164 sigaddset(&SR_sigset, SR_signum); | |
4165 | |
4166 /* Set up signal handler for suspend/resume */ | |
4167 act.sa_flags = SA_RESTART|SA_SIGINFO; | |
4168 act.sa_handler = (void (*)(int)) SR_handler; | |
4169 | |
4170 // SR_signum is blocked by default. | |
4171 // 4528190 - We also need to block pthread restart signal (32 on all | |
4172 // supported Linux platforms). Note that LinuxThreads need to block | |
4173 // this signal for all threads to work properly. So we don't have | |
4174 // to use hard-coded signal number when setting up the mask. | |
4175 pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); | |
4176 | |
4177 if (sigaction(SR_signum, &act, 0) == -1) { | |
4178 return -1; | |
4179 } | |
4180 | |
4181 // Save signal flag | |
4182 os::Linux::set_our_sigflags(SR_signum, act.sa_flags); | |
4183 return 0; | |
4184 } | |
4185 | |
10405 | 4186 static int sr_notify(OSThread* osthread) { |
4187 int status = pthread_kill(osthread->pthread_id(), SR_signum); | |
4188 assert_status(status == 0, status, "pthread_kill"); | |
4189 return status; | |
4190 } | |
4191 | |
4192 // "Randomly" selected value for how long we want to spin | |
4193 // before bailing out on suspending a thread, also how often | |
4194 // we send a signal to a thread we want to resume | |
4195 static const int RANDOMLY_LARGE_INTEGER = 1000000; | |
4196 static const int RANDOMLY_LARGE_INTEGER2 = 100; | |
0 | 4197 |
4198 // returns true on success and false on error - really an error is fatal | |
4199 // but this seems the normal response to library errors | |
4200 static bool do_suspend(OSThread* osthread) { | |
10405 | 4201 assert(osthread->sr.is_running(), "thread should be running"); |
4202 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); | |
4203 | |
0 | 4204 // mark as suspended and send signal |
10405 | 4205 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
4206 // failed to switch, state wasn't running? | |
4207 ShouldNotReachHere(); | |
4208 return false; | |
4209 } | |
4210 | |
4211 if (sr_notify(osthread) != 0) { | |
4212 ShouldNotReachHere(); | |
4213 } | |
4214 | |
4215 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED | |
4216 while (true) { | |
4217 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
4218 break; | |
4219 } else { | |
4220 // timeout | |
4221 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); | |
4222 if (cancelled == os::SuspendResume::SR_RUNNING) { | |
4223 return false; | |
4224 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { | |
4225 // make sure that we consume the signal on the semaphore as well | |
4226 sr_semaphore.wait(); | |
4227 break; | |
4228 } else { | |
4229 ShouldNotReachHere(); | |
4230 return false; | |
4231 } | |
0 | 4232 } |
10405 | 4233 } |
4234 | |
4235 guarantee(osthread->sr.is_suspended(), "Must be suspended"); | |
4236 return true; | |
0 | 4237 } |
4238 | |
4239 static void do_resume(OSThread* osthread) { | |
4240 assert(osthread->sr.is_suspended(), "thread should be suspended"); | |
10405 | 4241 assert(!sr_semaphore.trywait(), "invalid semaphore state"); |
4242 | |
4243 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { | |
4244 // failed to switch to WAKEUP_REQUEST | |
4245 ShouldNotReachHere(); | |
4246 return; | |
4247 } | |
4248 | |
4249 while (true) { | |
4250 if (sr_notify(osthread) == 0) { | |
4251 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
4252 if (osthread->sr.is_running()) { | |
4253 return; | |
4254 } | |
4255 } | |
4256 } else { | |
4257 ShouldNotReachHere(); | |
0 | 4258 } |
4259 } | |
10405 | 4260 |
4261 guarantee(osthread->sr.is_running(), "Must be running!"); | |
0 | 4262 } |
4263 | |
4264 //////////////////////////////////////////////////////////////////////////////// | |
4265 // interrupt support | |
4266 | |
4267 void os::interrupt(Thread* thread) { | |
4268 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
4269 "possibility of dangling Thread pointer"); | |
4270 | |
4271 OSThread* osthread = thread->osthread(); | |
4272 | |
4273 if (!osthread->interrupted()) { | |
4274 osthread->set_interrupted(true); | |
4275 // More than one thread can get here with the same value of osthread, | |
4276 // resulting in multiple notifications. We do, however, want the store | |
4277 // to interrupted() to be visible to other threads before we execute unpark(). | |
4278 OrderAccess::fence(); | |
4279 ParkEvent * const slp = thread->_SleepEvent ; | |
4280 if (slp != NULL) slp->unpark() ; | |
4281 } | |
4282 | |
4283 // For JSR166. Unpark even if interrupt status already was set | |
4284 if (thread->is_Java_thread()) | |
4285 ((JavaThread*)thread)->parker()->unpark(); | |
4286 | |
4287 ParkEvent * ev = thread->_ParkEvent ; | |
4288 if (ev != NULL) ev->unpark() ; | |
4289 | |
4290 } | |
4291 | |
4292 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
4293 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
4294 "possibility of dangling Thread pointer"); | |
4295 | |
4296 OSThread* osthread = thread->osthread(); | |
4297 | |
4298 bool interrupted = osthread->interrupted(); | |
4299 | |
4300 if (interrupted && clear_interrupted) { | |
4301 osthread->set_interrupted(false); | |
4302 // consider thread->_SleepEvent->reset() ... optional optimization | |
4303 } | |
4304 | |
4305 return interrupted; | |
4306 } | |
4307 | |
4308 /////////////////////////////////////////////////////////////////////////////////// | |
4309 // signal handling (except suspend/resume) | |
4310 | |
4311 // This routine may be used by user applications as a "hook" to catch signals. | |
4312 // The user-defined signal handler must pass unrecognized signals to this | |
4313 // routine, and if it returns true (non-zero), then the signal handler must | |
4314 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
4315 // routine will never retun false (zero), but instead will execute a VM panic | |
4316 // routine kill the process. | |
4317 // | |
4318 // If this routine returns false, it is OK to call it again. This allows | |
4319 // the user-defined signal handler to perform checks either before or after | |
4320 // the VM performs its own checks. Naturally, the user code would be making | |
4321 // a serious error if it tried to handle an exception (such as a null check | |
4322 // or breakpoint) that the VM was generating for its own correct operation. | |
4323 // | |
4324 // This routine may recognize any of the following kinds of signals: | |
4325 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. | |
4326 // It should be consulted by handlers for any of those signals. | |
4327 // | |
4328 // The caller of this routine must pass in the three arguments supplied | |
4329 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
4330 // field of the structure passed to sigaction(). This routine assumes that | |
4331 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
4332 // | |
4333 // Note that the VM will print warnings if it detects conflicting signal | |
4334 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
4335 // | |
2191 | 4336 extern "C" JNIEXPORT int |
0 | 4337 JVM_handle_linux_signal(int signo, siginfo_t* siginfo, |
4338 void* ucontext, int abort_if_unrecognized); | |
4339 | |
4340 void signalHandler(int sig, siginfo_t* info, void* uc) { | |
4341 assert(info != NULL && uc != NULL, "it must be old kernel"); | |
8067 | 4342 int orig_errno = errno; // Preserve errno value over signal handler. |
0 | 4343 JVM_handle_linux_signal(sig, info, uc, true); |
8067 | 4344 errno = orig_errno; |
0 | 4345 } |
4346 | |
4347 | |
4348 // This boolean allows users to forward their own non-matching signals | |
4349 // to JVM_handle_linux_signal, harmlessly. | |
4350 bool os::Linux::signal_handlers_are_installed = false; | |
4351 | |
4352 // For signal-chaining | |
4353 struct sigaction os::Linux::sigact[MAXSIGNUM]; | |
4354 unsigned int os::Linux::sigs = 0; | |
4355 bool os::Linux::libjsig_is_loaded = false; | |
4356 typedef struct sigaction *(*get_signal_t)(int); | |
4357 get_signal_t os::Linux::get_signal_action = NULL; | |
4358 | |
4359 struct sigaction* os::Linux::get_chained_signal_action(int sig) { | |
4360 struct sigaction *actp = NULL; | |
4361 | |
4362 if (libjsig_is_loaded) { | |
4363 // Retrieve the old signal handler from libjsig | |
4364 actp = (*get_signal_action)(sig); | |
4365 } | |
4366 if (actp == NULL) { | |
4367 // Retrieve the preinstalled signal handler from jvm | |
4368 actp = get_preinstalled_handler(sig); | |
4369 } | |
4370 | |
4371 return actp; | |
4372 } | |
4373 | |
4374 static bool call_chained_handler(struct sigaction *actp, int sig, | |
4375 siginfo_t *siginfo, void *context) { | |
4376 // Call the old signal handler | |
4377 if (actp->sa_handler == SIG_DFL) { | |
4378 // It's more reasonable to let jvm treat it as an unexpected exception | |
4379 // instead of taking the default action. | |
4380 return false; | |
4381 } else if (actp->sa_handler != SIG_IGN) { | |
4382 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
4383 // automaticlly block the signal | |
4384 sigaddset(&(actp->sa_mask), sig); | |
4385 } | |
4386 | |
23822
626f594dffa6
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
csahu
parents:
23418
diff
changeset
|
4387 sa_handler_t hand = NULL; |
626f594dffa6
8139040: Fix initializations before ShouldNotReachHere() etc. and enable -Wuninitialized on linux.
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23418
diff
changeset
|
4388 sa_sigaction_t sa = NULL; |
0 | 4389 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; |
4390 // retrieve the chained handler | |
4391 if (siginfo_flag_set) { | |
4392 sa = actp->sa_sigaction; | |
4393 } else { | |
4394 hand = actp->sa_handler; | |
4395 } | |
4396 | |
4397 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
4398 actp->sa_handler = SIG_DFL; | |
4399 } | |
4400 | |
4401 // try to honor the signal mask | |
4402 sigset_t oset; | |
4403 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
4404 | |
4405 // call into the chained handler | |
4406 if (siginfo_flag_set) { | |
4407 (*sa)(sig, siginfo, context); | |
4408 } else { | |
4409 (*hand)(sig); | |
4410 } | |
4411 | |
4412 // restore the signal mask | |
4413 pthread_sigmask(SIG_SETMASK, &oset, 0); | |
4414 } | |
4415 // Tell jvm's signal handler the signal is taken care of. | |
4416 return true; | |
4417 } | |
4418 | |
4419 bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
4420 bool chained = false; | |
4421 // signal-chaining | |
4422 if (UseSignalChaining) { | |
4423 struct sigaction *actp = get_chained_signal_action(sig); | |
4424 if (actp != NULL) { | |
4425 chained = call_chained_handler(actp, sig, siginfo, context); | |
4426 } | |
4427 } | |
4428 return chained; | |
4429 } | |
4430 | |
4431 struct sigaction* os::Linux::get_preinstalled_handler(int sig) { | |
4432 if ((( (unsigned int)1 << sig ) & sigs) != 0) { | |
4433 return &sigact[sig]; | |
4434 } | |
4435 return NULL; | |
4436 } | |
4437 | |
4438 void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
4439 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4440 sigact[sig] = oldAct; | |
4441 sigs |= (unsigned int)1 << sig; | |
4442 } | |
4443 | |
4444 // for diagnostic | |
4445 int os::Linux::sigflags[MAXSIGNUM]; | |
4446 | |
4447 int os::Linux::get_our_sigflags(int sig) { | |
4448 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4449 return sigflags[sig]; | |
4450 } | |
4451 | |
4452 void os::Linux::set_our_sigflags(int sig, int flags) { | |
4453 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4454 sigflags[sig] = flags; | |
4455 } | |
4456 | |
4457 void os::Linux::set_signal_handler(int sig, bool set_installed) { | |
4458 // Check for overwrite. | |
4459 struct sigaction oldAct; | |
4460 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
4461 | |
4462 void* oldhand = oldAct.sa_sigaction | |
4463 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
4464 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
4465 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
4466 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
4467 oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { | |
4468 if (AllowUserSignalHandlers || !set_installed) { | |
4469 // Do not overwrite; user takes responsibility to forward to us. | |
4470 return; | |
4471 } else if (UseSignalChaining) { | |
4472 // save the old handler in jvm | |
4473 save_preinstalled_handler(sig, oldAct); | |
4474 // libjsig also interposes the sigaction() call below and saves the | |
4475 // old sigaction on it own. | |
4476 } else { | |
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1353
diff
changeset
|
4477 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
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1353
diff
changeset
|
4478 "%#lx for signal %d.", (long)oldhand, sig)); |
0 | 4479 } |
4480 } | |
4481 | |
4482 struct sigaction sigAct; | |
4483 sigfillset(&(sigAct.sa_mask)); | |
4484 sigAct.sa_handler = SIG_DFL; | |
4485 if (!set_installed) { | |
4486 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
4487 } else { | |
4488 sigAct.sa_sigaction = signalHandler; | |
4489 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
4490 } | |
4491 // Save flags, which are set by ours | |
4492 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
4493 sigflags[sig] = sigAct.sa_flags; | |
4494 | |
4495 int ret = sigaction(sig, &sigAct, &oldAct); | |
4496 assert(ret == 0, "check"); | |
4497 | |
4498 void* oldhand2 = oldAct.sa_sigaction | |
4499 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
4500 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
4501 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
4502 } | |
4503 | |
4504 // install signal handlers for signals that HotSpot needs to | |
4505 // handle in order to support Java-level exception handling. | |
4506 | |
4507 void os::Linux::install_signal_handlers() { | |
4508 if (!signal_handlers_are_installed) { | |
4509 signal_handlers_are_installed = true; | |
4510 | |
4511 // signal-chaining | |
4512 typedef void (*signal_setting_t)(); | |
4513 signal_setting_t begin_signal_setting = NULL; | |
4514 signal_setting_t end_signal_setting = NULL; | |
4515 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
4516 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
4517 if (begin_signal_setting != NULL) { | |
4518 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
4519 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
4520 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
4521 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
4522 libjsig_is_loaded = true; | |
4523 assert(UseSignalChaining, "should enable signal-chaining"); | |
4524 } | |
4525 if (libjsig_is_loaded) { | |
4526 // Tell libjsig jvm is setting signal handlers | |
4527 (*begin_signal_setting)(); | |
4528 } | |
4529 | |
4530 set_signal_handler(SIGSEGV, true); | |
4531 set_signal_handler(SIGPIPE, true); | |
4532 set_signal_handler(SIGBUS, true); | |
4533 set_signal_handler(SIGILL, true); | |
4534 set_signal_handler(SIGFPE, true); | |
14432
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14422
diff
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|
4535 #if defined(PPC64) |
935bf3340572
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14422
diff
changeset
|
4536 set_signal_handler(SIGTRAP, true); |
935bf3340572
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14422
diff
changeset
|
4537 #endif |
0 | 4538 set_signal_handler(SIGXFSZ, true); |
4539 | |
4540 if (libjsig_is_loaded) { | |
4541 // Tell libjsig jvm finishes setting signal handlers | |
4542 (*end_signal_setting)(); | |
4543 } | |
4544 | |
4545 // 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
|
4546 // 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
|
4547 // Log that signal checking is off only if -verbose:jni is specified. |
0 | 4548 if (CheckJNICalls) { |
4549 if (libjsig_is_loaded) { | |
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4550 if (PrintJNIResolving) { |
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4551 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
|
4552 } |
0 | 4553 check_signals = false; |
4554 } | |
4555 if (AllowUserSignalHandlers) { | |
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4556 if (PrintJNIResolving) { |
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4557 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
|
4558 } |
0 | 4559 check_signals = false; |
4560 } | |
4561 } | |
4562 } | |
4563 } | |
4564 | |
4565 // This is the fastest way to get thread cpu time on Linux. | |
4566 // Returns cpu time (user+sys) for any thread, not only for current. | |
4567 // POSIX compliant clocks are implemented in the kernels 2.6.16+. | |
4568 // It might work on 2.6.10+ with a special kernel/glibc patch. | |
4569 // For reference, please, see IEEE Std 1003.1-2004: | |
4570 // http://www.unix.org/single_unix_specification | |
4571 | |
4572 jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) { | |
4573 struct timespec tp; | |
4574 int rc = os::Linux::clock_gettime(clockid, &tp); | |
4575 assert(rc == 0, "clock_gettime is expected to return 0 code"); | |
4576 | |
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
4577 return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec; |
0 | 4578 } |
4579 | |
4580 ///// | |
4581 // glibc on Linux platform uses non-documented flag | |
4582 // to indicate, that some special sort of signal | |
4583 // trampoline is used. | |
4584 // We will never set this flag, and we should | |
4585 // ignore this flag in our diagnostic | |
4586 #ifdef SIGNIFICANT_SIGNAL_MASK | |
4587 #undef SIGNIFICANT_SIGNAL_MASK | |
4588 #endif | |
4589 #define SIGNIFICANT_SIGNAL_MASK (~0x04000000) | |
4590 | |
4591 static const char* get_signal_handler_name(address handler, | |
4592 char* buf, int buflen) { | |
23822
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csahu
parents:
23418
diff
changeset
|
4593 int offset = 0; |
0 | 4594 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); |
4595 if (found) { | |
4596 // skip directory names | |
4597 const char *p1, *p2; | |
4598 p1 = buf; | |
4599 size_t len = strlen(os::file_separator()); | |
4600 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
4601 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
4602 } else { | |
4603 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
4604 } | |
4605 return buf; | |
4606 } | |
4607 | |
4608 static void print_signal_handler(outputStream* st, int sig, | |
4609 char* buf, size_t buflen) { | |
4610 struct sigaction sa; | |
4611 | |
4612 sigaction(sig, NULL, &sa); | |
4613 | |
4614 // See comment for SIGNIFICANT_SIGNAL_MASK define | |
4615 sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
4616 | |
4617 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
4618 | |
4619 address handler = (sa.sa_flags & SA_SIGINFO) | |
4620 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
4621 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
4622 | |
4623 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
4624 st->print("SIG_DFL"); | |
4625 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
4626 st->print("SIG_IGN"); | |
4627 } else { | |
4628 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
4629 } | |
4630 | |
14410 | 4631 st->print(", sa_mask[0]="); |
4632 os::Posix::print_signal_set_short(st, &sa.sa_mask); | |
0 | 4633 |
4634 address rh = VMError::get_resetted_sighandler(sig); | |
4635 // May be, handler was resetted by VMError? | |
4636 if(rh != NULL) { | |
4637 handler = rh; | |
4638 sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; | |
4639 } | |
4640 | |
14410 | 4641 st->print(", sa_flags="); |
4642 os::Posix::print_sa_flags(st, sa.sa_flags); | |
0 | 4643 |
4644 // Check: is it our handler? | |
4645 if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || | |
4646 handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { | |
4647 // It is our signal handler | |
4648 // check for flags, reset system-used one! | |
4649 if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
4650 st->print( | |
4651 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
4652 os::Linux::get_our_sigflags(sig)); | |
4653 } | |
4654 } | |
4655 st->cr(); | |
4656 } | |
4657 | |
4658 | |
4659 #define DO_SIGNAL_CHECK(sig) \ | |
4660 if (!sigismember(&check_signal_done, sig)) \ | |
4661 os::Linux::check_signal_handler(sig) | |
4662 | |
4663 // This method is a periodic task to check for misbehaving JNI applications | |
4664 // under CheckJNI, we can add any periodic checks here | |
4665 | |
4666 void os::run_periodic_checks() { | |
4667 | |
4668 if (check_signals == false) return; | |
4669 | |
4670 // SEGV and BUS if overridden could potentially prevent | |
4671 // generation of hs*.log in the event of a crash, debugging | |
4672 // such a case can be very challenging, so we absolutely | |
4673 // check the following for a good measure: | |
4674 DO_SIGNAL_CHECK(SIGSEGV); | |
4675 DO_SIGNAL_CHECK(SIGILL); | |
4676 DO_SIGNAL_CHECK(SIGFPE); | |
4677 DO_SIGNAL_CHECK(SIGBUS); | |
4678 DO_SIGNAL_CHECK(SIGPIPE); | |
4679 DO_SIGNAL_CHECK(SIGXFSZ); | |
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
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parents:
14422
diff
changeset
|
4680 #if defined(PPC64) |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4681 DO_SIGNAL_CHECK(SIGTRAP); |
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
4682 #endif |
0 | 4683 |
4684 // ReduceSignalUsage allows the user to override these handlers | |
4685 // see comments at the very top and jvm_solaris.h | |
4686 if (!ReduceSignalUsage) { | |
4687 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
4688 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
4689 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
4690 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
4691 } | |
4692 | |
4693 DO_SIGNAL_CHECK(SR_signum); | |
4694 DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); | |
4695 } | |
4696 | |
4697 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
4698 | |
4699 static os_sigaction_t os_sigaction = NULL; | |
4700 | |
4701 void os::Linux::check_signal_handler(int sig) { | |
4702 char buf[O_BUFLEN]; | |
4703 address jvmHandler = NULL; | |
4704 | |
4705 | |
4706 struct sigaction act; | |
4707 if (os_sigaction == NULL) { | |
4708 // only trust the default sigaction, in case it has been interposed | |
4709 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
4710 if (os_sigaction == NULL) return; | |
4711 } | |
4712 | |
4713 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
4714 | |
4715 | |
4716 act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
4717 | |
4718 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
4719 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
4720 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
4721 | |
4722 | |
4723 switch(sig) { | |
4724 case SIGSEGV: | |
4725 case SIGBUS: | |
4726 case SIGFPE: | |
4727 case SIGPIPE: | |
4728 case SIGILL: | |
4729 case SIGXFSZ: | |
4730 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); | |
4731 break; | |
4732 | |
4733 case SHUTDOWN1_SIGNAL: | |
4734 case SHUTDOWN2_SIGNAL: | |
4735 case SHUTDOWN3_SIGNAL: | |
4736 case BREAK_SIGNAL: | |
4737 jvmHandler = (address)user_handler(); | |
4738 break; | |
4739 | |
4740 case INTERRUPT_SIGNAL: | |
4741 jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); | |
4742 break; | |
4743 | |
4744 default: | |
4745 if (sig == SR_signum) { | |
4746 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); | |
4747 } else { | |
4748 return; | |
4749 } | |
4750 break; | |
4751 } | |
4752 | |
4753 if (thisHandler != jvmHandler) { | |
4754 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
4755 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
4756 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
4757 // No need to check this sig any longer | |
4758 sigaddset(&check_signal_done, sig); | |
23020
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4759 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN |
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4760 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { |
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4761 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", |
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4762 exception_name(sig, buf, O_BUFLEN)); |
bbceafdc7a5f
6536943: Bogus -Xcheck:jni warning for SIG_INT action for SIGINT in JVM started from non-interactive shell
minqi
parents:
23004
diff
changeset
|
4763 } |
0 | 4764 } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) { |
4765 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
4766 tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig)); | |
4767 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
4768 // No need to check this sig any longer | |
4769 sigaddset(&check_signal_done, sig); | |
4770 } | |
4771 | |
4772 // Dump all the signal | |
4773 if (sigismember(&check_signal_done, sig)) { | |
4774 print_signal_handlers(tty, buf, O_BUFLEN); | |
4775 } | |
4776 } | |
4777 | |
4778 extern void report_error(char* file_name, int line_no, char* title, char* format, ...); | |
4779 | |
4780 extern bool signal_name(int signo, char* buf, size_t len); | |
4781 | |
4782 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
4783 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
4784 // signal | |
4785 if (!signal_name(exception_code, buf, size)) { | |
4786 jio_snprintf(buf, size, "SIG%d", exception_code); | |
4787 } | |
4788 return buf; | |
4789 } else { | |
4790 return NULL; | |
4791 } | |
4792 } | |
4793 | |
4794 // this is called _before_ the most of global arguments have been parsed | |
4795 void os::init(void) { | |
4796 char dummy; /* used to get a guess on initial stack address */ | |
4797 // first_hrtime = gethrtime(); | |
4798 | |
4799 // With LinuxThreads the JavaMain thread pid (primordial thread) | |
4800 // is different than the pid of the java launcher thread. | |
4801 // So, on Linux, the launcher thread pid is passed to the VM | |
4802 // via the sun.java.launcher.pid property. | |
4803 // Use this property instead of getpid() if it was correctly passed. | |
4804 // See bug 6351349. | |
4805 pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); | |
4806 | |
4807 _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); | |
4808 | |
4809 clock_tics_per_sec = sysconf(_SC_CLK_TCK); | |
4810 | |
4811 init_random(1234567); | |
4812 | |
4813 ThreadCritical::initialize(); | |
4814 | |
4815 Linux::set_page_size(sysconf(_SC_PAGESIZE)); | |
4816 if (Linux::page_size() == -1) { | |
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4817 fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)", |
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4818 strerror(errno))); |
0 | 4819 } |
4820 init_page_sizes((size_t) Linux::page_size()); | |
4821 | |
4822 Linux::initialize_system_info(); | |
4823 | |
4824 // main_thread points to the aboriginal thread | |
4825 Linux::_main_thread = pthread_self(); | |
4826 | |
4827 Linux::clock_init(); | |
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
4828 initial_time_count = javaTimeNanos(); |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4829 |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4830 // pthread_condattr initialization for monotonic clock |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4831 int status; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4832 pthread_condattr_t* _condattr = os::Linux::condAttr(); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4833 if ((status = pthread_condattr_init(_condattr)) != 0) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4834 fatal(err_msg("pthread_condattr_init: %s", strerror(status))); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4835 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4836 // Only set the clock if CLOCK_MONOTONIC is available |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4837 if (Linux::supports_monotonic_clock()) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4838 if ((status = pthread_condattr_setclock(_condattr, CLOCK_MONOTONIC)) != 0) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4839 if (status == EINVAL) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4840 warning("Unable to use monotonic clock with relative timed-waits" \ |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4841 " - changes to the time-of-day clock may have adverse affects"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4842 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4843 fatal(err_msg("pthread_condattr_setclock: %s", strerror(status))); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4844 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4845 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4846 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4847 // else it defaults to CLOCK_REALTIME |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4848 |
242 | 4849 pthread_mutex_init(&dl_mutex, NULL); |
10164
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4850 |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4851 // If the pagesize of the VM is greater than 8K determine the appropriate |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4852 // number of initial guard pages. The user can change this with the |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4853 // command line arguments, if needed. |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4854 if (vm_page_size() > (int)Linux::vm_default_page_size()) { |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4855 StackYellowPages = 1; |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4856 StackRedPages = 1; |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4857 StackShadowPages = round_to((StackShadowPages*Linux::vm_default_page_size()), vm_page_size()) / vm_page_size(); |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4858 } |
0 | 4859 } |
4860 | |
4861 // To install functions for atexit system call | |
4862 extern "C" { | |
4863 static void perfMemory_exit_helper() { | |
4864 perfMemory_exit(); | |
4865 } | |
4866 } | |
4867 | |
4868 // this is called _after_ the global arguments have been parsed | |
4869 jint os::init_2(void) | |
4870 { | |
4871 Linux::fast_thread_clock_init(); | |
4872 | |
4873 // Allocate a single page and mark it as readable for safepoint polling | |
4874 address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
4875 guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); | |
4876 | |
4877 os::set_polling_page( polling_page ); | |
4878 | |
4879 #ifndef PRODUCT | |
4880 if(Verbose && PrintMiscellaneous) | |
4881 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
4882 #endif | |
4883 | |
4884 if (!UseMembar) { | |
4885 address mem_serialize_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
4886 guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); |
0 | 4887 os::set_memory_serialize_page( mem_serialize_page ); |
4888 | |
4889 #ifndef PRODUCT | |
4890 if(Verbose && PrintMiscellaneous) | |
4891 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
4892 #endif | |
4893 } | |
4894 | |
4895 // initialize suspend/resume support - must do this before signal_sets_init() | |
4896 if (SR_initialize() != 0) { | |
4897 perror("SR_initialize failed"); | |
4898 return JNI_ERR; | |
4899 } | |
4900 | |
4901 Linux::signal_sets_init(); | |
4902 Linux::install_signal_handlers(); | |
4903 | |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4904 // 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
|
4905 // the java system classes, including StackOverflowError - depends on page |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4906 // 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
|
4907 // 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
|
4908 // class initialization depending on 32 or 64 bit VM. |
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4909 os::Linux::min_stack_allowed = MAX2(os::Linux::min_stack_allowed, |
10164
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4910 (size_t)(StackYellowPages+StackRedPages+StackShadowPages) * Linux::page_size() + |
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4911 (2*BytesPerWord COMPILER2_PRESENT(+1)) * Linux::vm_default_page_size()); |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4912 |
0 | 4913 size_t threadStackSizeInBytes = ThreadStackSize * K; |
4914 if (threadStackSizeInBytes != 0 && | |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4915 threadStackSizeInBytes < os::Linux::min_stack_allowed) { |
0 | 4916 tty->print_cr("\nThe stack size specified is too small, " |
4917 "Specify at least %dk", | |
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4918 os::Linux::min_stack_allowed/ K); |
0 | 4919 return JNI_ERR; |
4920 } | |
4921 | |
4922 // Make the stack size a multiple of the page size so that | |
4923 // the yellow/red zones can be guarded. | |
4924 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
4925 vm_page_size())); | |
4926 | |
4927 Linux::capture_initial_stack(JavaThread::stack_size_at_create()); | |
4928 | |
12313
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4929 #if defined(IA32) |
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4930 workaround_expand_exec_shield_cs_limit(); |
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4931 #endif |
899ecf76b570
8023956: Provide a work-around to broken Linux 32 bit "Exec Shield" using CS for NX emulation (crashing with SI_KERNEL)
dsimms
parents:
12252
diff
changeset
|
4932 |
0 | 4933 Linux::libpthread_init(); |
4934 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
4935 tty->print_cr("[HotSpot is running with %s, %s(%s)]\n", | |
4936 Linux::glibc_version(), Linux::libpthread_version(), | |
4937 Linux::is_floating_stack() ? "floating stack" : "fixed stack"); | |
4938 } | |
4939 | |
141 | 4940 if (UseNUMA) { |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4941 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
|
4942 UseNUMA = false; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4943 } else { |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4944 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
|
4945 // 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
|
4946 UseNUMA = false; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4947 } |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4948 } |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4949 // With SHM and HugeTLBFS large pages we cannot uncommit a page, so there's no way |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4950 // we can make the adaptive lgrp chunk resizing work. If the user specified |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4951 // both UseNUMA and UseLargePages (or UseSHM/UseHugeTLBFS) on the command line - warn and |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4952 // disable adaptive resizing. |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4953 if (UseNUMA && UseLargePages && !can_commit_large_page_memory()) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4954 if (FLAG_IS_DEFAULT(UseNUMA)) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4955 UseNUMA = false; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4956 } else { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4957 if (FLAG_IS_DEFAULT(UseLargePages) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4958 FLAG_IS_DEFAULT(UseSHM) && |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4959 FLAG_IS_DEFAULT(UseHugeTLBFS)) { |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4960 UseLargePages = false; |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4961 } else { |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4962 warning("UseNUMA is not fully compatible with SHM/HugeTLBFS large pages, disabling adaptive resizing"); |
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4963 UseAdaptiveSizePolicy = false; |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4964 UseAdaptiveNUMAChunkSizing = false; |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4965 } |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4966 } |
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4967 } |
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4968 if (!UseNUMA && ForceNUMA) { |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4969 UseNUMA = true; |
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4970 } |
141 | 4971 } |
4972 | |
0 | 4973 if (MaxFDLimit) { |
4974 // set the number of file descriptors to max. print out error | |
4975 // if getrlimit/setrlimit fails but continue regardless. | |
4976 struct rlimit nbr_files; | |
4977 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
4978 if (status != 0) { | |
4979 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
4980 perror("os::init_2 getrlimit failed"); | |
4981 } else { | |
4982 nbr_files.rlim_cur = nbr_files.rlim_max; | |
4983 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
4984 if (status != 0) { | |
4985 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
4986 perror("os::init_2 setrlimit failed"); | |
4987 } | |
4988 } | |
4989 } | |
4990 | |
4991 // Initialize lock used to serialize thread creation (see os::create_thread) | |
4992 Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false)); | |
4993 | |
4994 // at-exit methods are called in the reverse order of their registration. | |
4995 // atexit functions are called on return from main or as a result of a | |
4996 // call to exit(3C). There can be only 32 of these functions registered | |
4997 // and atexit() does not set errno. | |
4998 | |
4999 if (PerfAllowAtExitRegistration) { | |
5000 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
5001 // atexit functions can be delayed until process exit time, which | |
5002 // can be problematic for embedded VM situations. Embedded VMs should | |
5003 // call DestroyJavaVM() to assure that VM resources are released. | |
5004 | |
5005 // note: perfMemory_exit_helper atexit function may be removed in | |
5006 // the future if the appropriate cleanup code can be added to the | |
5007 // VM_Exit VMOperation's doit method. | |
5008 if (atexit(perfMemory_exit_helper) != 0) { | |
14391 | 5009 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
0 | 5010 } |
5011 } | |
5012 | |
5013 // initialize thread priority policy | |
5014 prio_init(); | |
5015 | |
5016 return JNI_OK; | |
5017 } | |
5018 | |
5019 // Mark the polling page as unreadable | |
5020 void os::make_polling_page_unreadable(void) { | |
5021 if( !guard_memory((char*)_polling_page, Linux::page_size()) ) | |
5022 fatal("Could not disable polling page"); | |
5023 }; | |
5024 | |
5025 // Mark the polling page as readable | |
5026 void os::make_polling_page_readable(void) { | |
237
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|
5027 if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) { |
0 | 5028 fatal("Could not enable polling page"); |
237
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|
5029 } |
0 | 5030 }; |
5031 | |
24176
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|
5032 static int os_cpu_count(const cpu_set_t* cpus) { |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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changeset
|
5033 int count = 0; |
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|
5034 // only look up to the number of configured processors |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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|
5035 for (int i = 0; i < os::processor_count(); i++) { |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5036 if (CPU_ISSET(i, cpus)) { |
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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|
5037 count++; |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5038 } |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5039 } |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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diff
changeset
|
5040 return count; |
e21dd2c95cf0
6515172: Runtime.availableProcessors() ignores Linux taskset command
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changeset
|
5041 } |
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|
5042 |
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|
5043 // Get the current number of available processors for this process. |
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|
5044 // This value can change at any time during a process's lifetime. |
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|
5045 // sched_getaffinity gives an accurate answer as it accounts for cpusets. |
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5046 // If anything goes wrong we fallback to returning the number of online |
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|
5047 // processors - which can be greater than the number available to the process. |
0 | 5048 int os::active_processor_count() { |
24176
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|
5049 cpu_set_t cpus; // can represent at most 1024 (CPU_SETSIZE) processors |
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|
5050 int cpus_size = sizeof(cpu_set_t); |
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|
5051 int cpu_count = 0; |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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|
5052 |
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|
5053 // pid 0 means the current thread - which we have to assume represents the process |
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|
5054 if (sched_getaffinity(0, cpus_size, &cpus) == 0) { |
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|
5055 cpu_count = os_cpu_count(&cpus); |
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|
5056 if (PrintActiveCpus) { |
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|
5057 tty->print_cr("active_processor_count: sched_getaffinity processor count: %d", cpu_count); |
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|
5058 } |
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|
5059 } |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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|
5060 else { |
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|
5061 cpu_count = ::sysconf(_SC_NPROCESSORS_ONLN); |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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|
5062 warning("sched_getaffinity failed (%s)- using online processor count (%d) " |
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changeset
|
5063 "which may exceed available processors", strerror(errno), cpu_count); |
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6515172: Runtime.availableProcessors() ignores Linux taskset command
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changeset
|
5064 } |
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changeset
|
5065 |
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changeset
|
5066 assert(cpu_count > 0 && cpu_count <= processor_count(), "sanity check"); |
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|
5067 return cpu_count; |
0 | 5068 } |
5069 | |
4006 | 5070 void os::set_native_thread_name(const char *name) { |
5071 // Not yet implemented. | |
5072 return; | |
5073 } | |
5074 | |
0 | 5075 bool os::distribute_processes(uint length, uint* distribution) { |
5076 // Not yet implemented. | |
5077 return false; | |
5078 } | |
5079 | |
5080 bool os::bind_to_processor(uint processor_id) { | |
5081 // Not yet implemented. | |
5082 return false; | |
5083 } | |
5084 | |
5085 /// | |
5086 | |
10405 | 5087 void os::SuspendedThreadTask::internal_do_task() { |
5088 if (do_suspend(_thread->osthread())) { | |
5089 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); | |
5090 do_task(context); | |
5091 do_resume(_thread->osthread()); | |
5092 } | |
5093 } | |
5094 | |
5095 class PcFetcher : public os::SuspendedThreadTask { | |
5096 public: | |
5097 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} | |
5098 ExtendedPC result(); | |
5099 protected: | |
5100 void do_task(const os::SuspendedThreadTaskContext& context); | |
5101 private: | |
5102 ExtendedPC _epc; | |
5103 }; | |
5104 | |
5105 ExtendedPC PcFetcher::result() { | |
5106 guarantee(is_done(), "task is not done yet."); | |
5107 return _epc; | |
5108 } | |
5109 | |
5110 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { | |
5111 Thread* thread = context.thread(); | |
5112 OSThread* osthread = thread->osthread(); | |
5113 if (osthread->ucontext() != NULL) { | |
5114 _epc = os::Linux::ucontext_get_pc((ucontext_t *) context.ucontext()); | |
5115 } else { | |
5116 // NULL context is unexpected, double-check this is the VMThread | |
5117 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); | |
5118 } | |
5119 } | |
5120 | |
0 | 5121 // Suspends the target using the signal mechanism and then grabs the PC before |
5122 // resuming the target. Used by the flat-profiler only | |
5123 ExtendedPC os::get_thread_pc(Thread* thread) { | |
5124 // Make sure that it is called by the watcher for the VMThread | |
5125 assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); | |
5126 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
5127 | |
10405 | 5128 PcFetcher fetcher(thread); |
5129 fetcher.run(); | |
5130 return fetcher.result(); | |
0 | 5131 } |
5132 | |
5133 int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) | |
5134 { | |
5135 if (is_NPTL()) { | |
5136 return pthread_cond_timedwait(_cond, _mutex, _abstime); | |
5137 } else { | |
5138 // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control | |
5139 // word back to default 64bit precision if condvar is signaled. Java | |
5140 // wants 53bit precision. Save and restore current value. | |
5141 int fpu = get_fpu_control_word(); | |
5142 int status = pthread_cond_timedwait(_cond, _mutex, _abstime); | |
5143 set_fpu_control_word(fpu); | |
5144 return status; | |
5145 } | |
5146 } | |
5147 | |
5148 //////////////////////////////////////////////////////////////////////////////// | |
5149 // debug support | |
5150 | |
1681
126ea7725993
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bobv
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1642
diff
changeset
|
5151 bool os::find(address addr, outputStream* st) { |
0 | 5152 Dl_info dlinfo; |
5153 memset(&dlinfo, 0, sizeof(dlinfo)); | |
11092
59b052799158
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changeset
|
5154 if (dladdr(addr, &dlinfo) != 0) { |
1681
126ea7725993
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1642
diff
changeset
|
5155 st->print(PTR_FORMAT ": ", addr); |
11092
59b052799158
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dcubed
parents:
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diff
changeset
|
5156 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
1681
126ea7725993
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bobv
parents:
1642
diff
changeset
|
5157 st->print("%s+%#x", dlinfo.dli_sname, |
0 | 5158 addr - (intptr_t)dlinfo.dli_saddr); |
11092
59b052799158
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dcubed
parents:
10986
diff
changeset
|
5159 } else if (dlinfo.dli_fbase != NULL) { |
1681
126ea7725993
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bobv
parents:
1642
diff
changeset
|
5160 st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
0 | 5161 } else { |
1681
126ea7725993
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1642
diff
changeset
|
5162 st->print("<absolute address>"); |
0 | 5163 } |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5164 if (dlinfo.dli_fname != NULL) { |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5165 st->print(" in %s", dlinfo.dli_fname); |
0 | 5166 } |
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
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diff
changeset
|
5167 if (dlinfo.dli_fbase != NULL) { |
1681
126ea7725993
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1642
diff
changeset
|
5168 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
0 | 5169 } |
1681
126ea7725993
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bobv
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diff
changeset
|
5170 st->cr(); |
0 | 5171 |
5172 if (Verbose) { | |
5173 // decode some bytes around the PC | |
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
5174 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
|
5175 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
0 | 5176 address lowest = (address) dlinfo.dli_sname; |
5177 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
5178 if (begin < lowest) begin = lowest; | |
5179 Dl_info dlinfo2; | |
11092
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8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
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diff
changeset
|
5180 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
0 | 5181 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) |
5182 end = (address) dlinfo2.dli_saddr; | |
1681
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|
5183 Disassembler::decode(begin, end, st); |
0 | 5184 } |
5185 return true; | |
5186 } | |
5187 return false; | |
5188 } | |
5189 | |
5190 //////////////////////////////////////////////////////////////////////////////// | |
5191 // misc | |
5192 | |
5193 // This does not do anything on Linux. This is basically a hook for being | |
5194 // able to use structured exception handling (thread-local exception filters) | |
5195 // on, e.g., Win32. | |
5196 void | |
5197 os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, | |
5198 JavaCallArguments* args, Thread* thread) { | |
5199 f(value, method, args, thread); | |
5200 } | |
5201 | |
5202 void os::print_statistics() { | |
5203 } | |
5204 | |
5205 int os::message_box(const char* title, const char* message) { | |
5206 int i; | |
5207 fdStream err(defaultStream::error_fd()); | |
5208 for (i = 0; i < 78; i++) err.print_raw("="); | |
5209 err.cr(); | |
5210 err.print_raw_cr(title); | |
5211 for (i = 0; i < 78; i++) err.print_raw("-"); | |
5212 err.cr(); | |
5213 err.print_raw_cr(message); | |
5214 for (i = 0; i < 78; i++) err.print_raw("="); | |
5215 err.cr(); | |
5216 | |
5217 char buf[16]; | |
5218 // Prevent process from exiting upon "read error" without consuming all CPU | |
5219 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
5220 | |
5221 return buf[0] == 'y' || buf[0] == 'Y'; | |
5222 } | |
5223 | |
5224 int os::stat(const char *path, struct stat *sbuf) { | |
5225 char pathbuf[MAX_PATH]; | |
5226 if (strlen(path) > MAX_PATH - 1) { | |
5227 errno = ENAMETOOLONG; | |
5228 return -1; | |
5229 } | |
1980
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diff
changeset
|
5230 os::native_path(strcpy(pathbuf, path)); |
0 | 5231 return ::stat(pathbuf, sbuf); |
5232 } | |
5233 | |
5234 bool os::check_heap(bool force) { | |
5235 return true; | |
5236 } | |
5237 | |
5238 int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { | |
5239 return ::vsnprintf(buf, count, format, args); | |
5240 } | |
5241 | |
5242 // Is a (classpath) directory empty? | |
5243 bool os::dir_is_empty(const char* path) { | |
5244 DIR *dir = NULL; | |
5245 struct dirent *ptr; | |
5246 | |
5247 dir = opendir(path); | |
5248 if (dir == NULL) return true; | |
5249 | |
5250 /* Scan the directory */ | |
5251 bool result = true; | |
5252 char buf[sizeof(struct dirent) + MAX_PATH]; | |
5253 while (result && (ptr = ::readdir(dir)) != NULL) { | |
5254 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
5255 result = false; | |
5256 } | |
5257 } | |
5258 closedir(dir); | |
5259 return result; | |
5260 } | |
5261 | |
1980
828eafbd85cc
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ikrylov
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diff
changeset
|
5262 // This code originates from JDK's sysOpen and open64_w |
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diff
changeset
|
5263 // from src/solaris/hpi/src/system_md.c |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
5264 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
5265 #ifndef O_DELETE |
828eafbd85cc
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1972
diff
changeset
|
5266 #define O_DELETE 0x10000 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5267 #endif |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
5268 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5269 // Open a file. Unlink the file immediately after open returns |
828eafbd85cc
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ikrylov
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1972
diff
changeset
|
5270 // if the specified oflag has the O_DELETE flag set. |
828eafbd85cc
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ikrylov
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1972
diff
changeset
|
5271 // 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
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1972
diff
changeset
|
5272 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
5273 int os::open(const char *path, int oflag, int mode) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5274 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5275 if (strlen(path) > MAX_PATH - 1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5276 errno = ENAMETOOLONG; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5277 return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5278 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5279 int fd; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
5280 int o_delete = (oflag & O_DELETE); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5281 oflag = oflag & ~O_DELETE; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5282 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5283 fd = ::open64(path, oflag, mode); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5284 if (fd == -1) return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5285 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5286 //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
|
5287 { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5288 struct stat64 buf64; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5289 int ret = ::fstat64(fd, &buf64); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5290 int st_mode = buf64.st_mode; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5291 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5292 if (ret != -1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5293 if ((st_mode & S_IFMT) == S_IFDIR) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5294 errno = EISDIR; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5295 ::close(fd); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5296 return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5297 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5298 } else { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5299 ::close(fd); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5300 return -1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5301 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5302 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5303 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5304 /* |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5305 * 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
|
5306 * specifically destined for a subprocess should have the |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5307 * 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
|
5308 * 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
|
5309 * 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
|
5310 * UNIXProcess.c), and this in turn might: |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5311 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5312 * - 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
|
5313 * descriptors, resulting in mysterious hangs, or |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5314 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5315 * - 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
|
5316 * suffering from bug 1085341. |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5317 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5318 * (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
|
5319 * design flaw) |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5320 * |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5321 * See: |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5322 * 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
|
5323 * 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
|
5324 * 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
|
5325 */ |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5326 #ifdef FD_CLOEXEC |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5327 { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5328 int flags = ::fcntl(fd, F_GETFD); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5329 if (flags != -1) |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5330 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5331 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5332 #endif |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5333 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5334 if (o_delete != 0) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5335 ::unlink(path); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5336 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5337 return fd; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5338 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5339 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5340 |
0 | 5341 // create binary file, rewriting existing file if required |
5342 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
5343 int oflags = O_WRONLY | O_CREAT; | |
5344 if (!rewrite_existing) { | |
5345 oflags |= O_EXCL; | |
5346 } | |
5347 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
5348 } | |
5349 | |
5350 // return current position of file pointer | |
5351 jlong os::current_file_offset(int fd) { | |
5352 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
5353 } | |
5354 | |
5355 // move file pointer to the specified offset | |
5356 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
5357 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
5358 } | |
5359 | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5360 // This code originates from JDK's sysAvailable |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5361 // 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
|
5362 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5363 int os::available(int fd, jlong *bytes) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5364 jlong cur, end; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5365 int mode; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5366 struct stat64 buf64; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5367 |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5368 if (::fstat64(fd, &buf64) >= 0) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5369 mode = buf64.st_mode; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5370 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
|
5371 /* |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5372 * 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
|
5373 * 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
|
5374 * blocking, interruptible calls in this file. |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5375 */ |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5376 int n; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5377 if (::ioctl(fd, FIONREAD, &n) >= 0) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5378 *bytes = n; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5379 return 1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5380 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5381 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5382 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5383 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5384 return 0; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5385 } 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
|
5386 return 0; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5387 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5388 return 0; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5389 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5390 *bytes = end - cur; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5391 return 1; |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5392 } |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5393 |
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5394 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
|
5395 // 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
|
5396 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
|
5397 |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5398 //%% 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
|
5399 // 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
|
5400 return (ret < 0) ? 0 : 1; |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5401 } |
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5402 |
0 | 5403 // Map a block of memory. |
6197 | 5404 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
0 | 5405 char *addr, size_t bytes, bool read_only, |
5406 bool allow_exec) { | |
5407 int prot; | |
5909 | 5408 int flags = MAP_PRIVATE; |
0 | 5409 |
5410 if (read_only) { | |
5411 prot = PROT_READ; | |
5412 } else { | |
5413 prot = PROT_READ | PROT_WRITE; | |
5414 } | |
5415 | |
5416 if (allow_exec) { | |
5417 prot |= PROT_EXEC; | |
5418 } | |
5419 | |
5420 if (addr != NULL) { | |
5421 flags |= MAP_FIXED; | |
5422 } | |
5423 | |
5424 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
5425 fd, file_offset); | |
5426 if (mapped_address == MAP_FAILED) { | |
5427 return NULL; | |
5428 } | |
5429 return mapped_address; | |
5430 } | |
5431 | |
5432 | |
5433 // Remap a block of memory. | |
6197 | 5434 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
0 | 5435 char *addr, size_t bytes, bool read_only, |
5436 bool allow_exec) { | |
5437 // same as map_memory() on this OS | |
5438 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
5439 allow_exec); | |
5440 } | |
5441 | |
5442 | |
5443 // Unmap a block of memory. | |
6197 | 5444 bool os::pd_unmap_memory(char* addr, size_t bytes) { |
0 | 5445 return munmap(addr, bytes) == 0; |
5446 } | |
5447 | |
5448 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time); | |
5449 | |
5450 static clockid_t thread_cpu_clockid(Thread* thread) { | |
5451 pthread_t tid = thread->osthread()->pthread_id(); | |
5452 clockid_t clockid; | |
5453 | |
5454 // Get thread clockid | |
5455 int rc = os::Linux::pthread_getcpuclockid(tid, &clockid); | |
5456 assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code"); | |
5457 return clockid; | |
5458 } | |
5459 | |
5460 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
5461 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
5462 // of a thread. | |
5463 // | |
5464 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
5465 // the fast estimate available on the platform. | |
5466 | |
5467 jlong os::current_thread_cpu_time() { | |
5468 if (os::Linux::supports_fast_thread_cpu_time()) { | |
5469 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
5470 } else { | |
5471 // return user + sys since the cost is the same | |
5472 return slow_thread_cpu_time(Thread::current(), true /* user + sys */); | |
5473 } | |
5474 } | |
5475 | |
5476 jlong os::thread_cpu_time(Thread* thread) { | |
5477 // consistent with what current_thread_cpu_time() returns | |
5478 if (os::Linux::supports_fast_thread_cpu_time()) { | |
5479 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
5480 } else { | |
5481 return slow_thread_cpu_time(thread, true /* user + sys */); | |
5482 } | |
5483 } | |
5484 | |
5485 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
5486 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
5487 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
5488 } else { | |
5489 return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
5490 } | |
5491 } | |
5492 | |
5493 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
5494 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
5495 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
5496 } else { | |
5497 return slow_thread_cpu_time(thread, user_sys_cpu_time); | |
5498 } | |
5499 } | |
5500 | |
5501 // | |
5502 // -1 on error. | |
5503 // | |
5504 | |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
5505 PRAGMA_DIAG_PUSH |
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17848
diff
changeset
|
5506 PRAGMA_FORMAT_NONLITERAL_IGNORED |
0 | 5507 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
5508 static bool proc_task_unchecked = true; | |
5509 static const char *proc_stat_path = "/proc/%d/stat"; | |
5510 pid_t tid = thread->osthread()->thread_id(); | |
5511 char *s; | |
5512 char stat[2048]; | |
5513 int statlen; | |
5514 char proc_name[64]; | |
5515 int count; | |
5516 long sys_time, user_time; | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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5517 char cdummy; |
0 | 5518 int idummy; |
5519 long ldummy; | |
5520 FILE *fp; | |
5521 | |
5522 // The /proc/<tid>/stat aggregates per-process usage on | |
5523 // new Linux kernels 2.6+ where NPTL is supported. | |
5524 // The /proc/self/task/<tid>/stat still has the per-thread usage. | |
5525 // See bug 6328462. | |
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5526 // There possibly can be cases where there is no directory |
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5527 // /proc/self/task, so we check its availability. |
0 | 5528 if (proc_task_unchecked && os::Linux::is_NPTL()) { |
5529 // This is executed only once | |
5530 proc_task_unchecked = false; | |
5531 fp = fopen("/proc/self/task", "r"); | |
5532 if (fp != NULL) { | |
5533 proc_stat_path = "/proc/self/task/%d/stat"; | |
5534 fclose(fp); | |
5535 } | |
5536 } | |
5537 | |
5538 sprintf(proc_name, proc_stat_path, tid); | |
5539 fp = fopen(proc_name, "r"); | |
5540 if ( fp == NULL ) return -1; | |
5541 statlen = fread(stat, 1, 2047, fp); | |
5542 stat[statlen] = '\0'; | |
5543 fclose(fp); | |
5544 | |
5545 // Skip pid and the command string. Note that we could be dealing with | |
5546 // weird command names, e.g. user could decide to rename java launcher | |
5547 // to "java 1.4.2 :)", then the stat file would look like | |
5548 // 1234 (java 1.4.2 :)) R ... ... | |
5549 // We don't really need to know the command string, just find the last | |
5550 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
5551 s = strrchr(stat, ')'); | |
5552 if (s == NULL ) return -1; | |
5553 | |
5554 // Skip blank chars | |
5555 do s++; while (isspace(*s)); | |
5556 | |
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5557 count = sscanf(s,"%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu", |
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5558 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy, |
0 | 5559 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy, |
5560 &user_time, &sys_time); | |
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5561 if ( count != 13 ) return -1; |
0 | 5562 if (user_sys_cpu_time) { |
5563 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); | |
5564 } else { | |
5565 return (jlong)user_time * (1000000000 / clock_tics_per_sec); | |
5566 } | |
5567 } | |
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5568 PRAGMA_DIAG_POP |
0 | 5569 |
5570 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
5571 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
5572 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
5573 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
5574 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
5575 } | |
5576 | |
5577 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
5578 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
5579 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
5580 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
5581 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
5582 } | |
5583 | |
5584 bool os::is_thread_cpu_time_supported() { | |
5585 return true; | |
5586 } | |
5587 | |
5588 // System loadavg support. Returns -1 if load average cannot be obtained. | |
5589 // Linux doesn't yet have a (official) notion of processor sets, | |
5590 // so just return the system wide load average. | |
5591 int os::loadavg(double loadavg[], int nelem) { | |
5592 return ::getloadavg(loadavg, nelem); | |
5593 } | |
5594 | |
5595 void os::pause() { | |
5596 char filename[MAX_PATH]; | |
5597 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
5598 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
5599 } else { | |
5600 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
5601 } | |
5602 | |
5603 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
5604 if (fd != -1) { | |
5605 struct stat buf; | |
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5606 ::close(fd); |
0 | 5607 while (::stat(filename, &buf) == 0) { |
5608 (void)::poll(NULL, 0, 100); | |
5609 } | |
5610 } else { | |
5611 jio_fprintf(stderr, | |
5612 "Could not open pause file '%s', continuing immediately.\n", filename); | |
5613 } | |
5614 } | |
5615 | |
5616 | |
5617 // Refer to the comments in os_solaris.cpp park-unpark. | |
5618 // | |
5619 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can | |
5620 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. | |
5621 // For specifics regarding the bug see GLIBC BUGID 261237 : | |
5622 // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. | |
5623 // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future | |
5624 // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar | |
5625 // is used. (The simple C test-case provided in the GLIBC bug report manifests the | |
5626 // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() | |
5627 // and monitorenter when we're using 1-0 locking. All those operations may result in | |
5628 // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version | |
5629 // of libpthread avoids the problem, but isn't practical. | |
5630 // | |
5631 // Possible remedies: | |
5632 // | |
5633 // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. | |
5634 // This is palliative and probabilistic, however. If the thread is preempted | |
5635 // between the call to compute_abstime() and pthread_cond_timedwait(), more | |
5636 // than the minimum period may have passed, and the abstime may be stale (in the | |
5637 // past) resultin in a hang. Using this technique reduces the odds of a hang | |
5638 // but the JVM is still vulnerable, particularly on heavily loaded systems. | |
5639 // | |
5640 // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead | |
5641 // of the usual flag-condvar-mutex idiom. The write side of the pipe is set | |
5642 // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) | |
5643 // reduces to poll()+read(). This works well, but consumes 2 FDs per extant | |
5644 // thread. | |
5645 // | |
5646 // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread | |
5647 // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing | |
5648 // a timeout request to the chron thread and then blocking via pthread_cond_wait(). | |
5649 // This also works well. In fact it avoids kernel-level scalability impediments | |
5650 // on certain platforms that don't handle lots of active pthread_cond_timedwait() | |
5651 // timers in a graceful fashion. | |
5652 // | |
5653 // 4. When the abstime value is in the past it appears that control returns | |
5654 // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. | |
5655 // Subsequent timedwait/wait calls may hang indefinitely. Given that, we | |
5656 // can avoid the problem by reinitializing the condvar -- by cond_destroy() | |
5657 // followed by cond_init() -- after all calls to pthread_cond_timedwait(). | |
5658 // It may be possible to avoid reinitialization by checking the return | |
5659 // value from pthread_cond_timedwait(). In addition to reinitializing the | |
5660 // condvar we must establish the invariant that cond_signal() is only called | |
5661 // within critical sections protected by the adjunct mutex. This prevents | |
5662 // cond_signal() from "seeing" a condvar that's in the midst of being | |
5663 // reinitialized or that is corrupt. Sadly, this invariant obviates the | |
5664 // desirable signal-after-unlock optimization that avoids futile context switching. | |
5665 // | |
5666 // I'm also concerned that some versions of NTPL might allocate an auxilliary | |
5667 // structure when a condvar is used or initialized. cond_destroy() would | |
5668 // release the helper structure. Our reinitialize-after-timedwait fix | |
5669 // put excessive stress on malloc/free and locks protecting the c-heap. | |
5670 // | |
5671 // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. | |
5672 // It may be possible to refine (4) by checking the kernel and NTPL verisons | |
5673 // and only enabling the work-around for vulnerable environments. | |
5674 | |
5675 // utility to compute the abstime argument to timedwait: | |
5676 // millis is the relative timeout time | |
5677 // abstime will be the absolute timeout time | |
5678 // TODO: replace compute_abstime() with unpackTime() | |
5679 | |
5680 static struct timespec* compute_abstime(timespec* abstime, jlong millis) { | |
5681 if (millis < 0) millis = 0; | |
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5682 |
0 | 5683 jlong seconds = millis / 1000; |
5684 millis %= 1000; | |
5685 if (seconds > 50000000) { // see man cond_timedwait(3T) | |
5686 seconds = 50000000; | |
5687 } | |
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5688 |
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5689 if (os::Linux::supports_monotonic_clock()) { |
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|
5690 struct timespec now; |
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5691 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
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5692 assert_status(status == 0, status, "clock_gettime"); |
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5693 abstime->tv_sec = now.tv_sec + seconds; |
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5694 long nanos = now.tv_nsec + millis * NANOSECS_PER_MILLISEC; |
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5695 if (nanos >= NANOSECS_PER_SEC) { |
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5696 abstime->tv_sec += 1; |
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5697 nanos -= NANOSECS_PER_SEC; |
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5698 } |
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5699 abstime->tv_nsec = nanos; |
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5700 } else { |
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|
5701 struct timeval now; |
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5702 int status = gettimeofday(&now, NULL); |
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5703 assert(status == 0, "gettimeofday"); |
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5704 abstime->tv_sec = now.tv_sec + seconds; |
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5705 long usec = now.tv_usec + millis * 1000; |
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5706 if (usec >= 1000000) { |
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5707 abstime->tv_sec += 1; |
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5708 usec -= 1000000; |
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5709 } |
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5710 abstime->tv_nsec = usec * 1000; |
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5711 } |
0 | 5712 return abstime; |
5713 } | |
5714 | |
5715 | |
5716 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
5717 // Conceptually TryPark() should be equivalent to park(0). | |
5718 | |
5719 int os::PlatformEvent::TryPark() { | |
5720 for (;;) { | |
5721 const int v = _Event ; | |
5722 guarantee ((v == 0) || (v == 1), "invariant") ; | |
5723 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
5724 } | |
5725 } | |
5726 | |
5727 void os::PlatformEvent::park() { // AKA "down()" | |
5728 // Invariant: Only the thread associated with the Event/PlatformEvent | |
5729 // may call park(). | |
5730 // TODO: assert that _Assoc != NULL or _Assoc == Self | |
5731 int v ; | |
5732 for (;;) { | |
5733 v = _Event ; | |
5734 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
5735 } | |
5736 guarantee (v >= 0, "invariant") ; | |
5737 if (v == 0) { | |
5738 // Do this the hard way by blocking ... | |
5739 int status = pthread_mutex_lock(_mutex); | |
5740 assert_status(status == 0, status, "mutex_lock"); | |
5741 guarantee (_nParked == 0, "invariant") ; | |
5742 ++ _nParked ; | |
5743 while (_Event < 0) { | |
5744 status = pthread_cond_wait(_cond, _mutex); | |
5745 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
5746 // Treat this the same as if the wait was interrupted | |
5747 if (status == ETIME) { status = EINTR; } | |
5748 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
5749 } | |
5750 -- _nParked ; | |
5751 | |
5752 _Event = 0 ; | |
5753 status = pthread_mutex_unlock(_mutex); | |
5754 assert_status(status == 0, status, "mutex_unlock"); | |
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5755 // Paranoia to ensure our locked and lock-free paths interact |
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5756 // correctly with each other. |
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|
5757 OrderAccess::fence(); |
0 | 5758 } |
5759 guarantee (_Event >= 0, "invariant") ; | |
5760 } | |
5761 | |
5762 int os::PlatformEvent::park(jlong millis) { | |
5763 guarantee (_nParked == 0, "invariant") ; | |
5764 | |
5765 int v ; | |
5766 for (;;) { | |
5767 v = _Event ; | |
5768 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
5769 } | |
5770 guarantee (v >= 0, "invariant") ; | |
5771 if (v != 0) return OS_OK ; | |
5772 | |
5773 // We do this the hard way, by blocking the thread. | |
5774 // Consider enforcing a minimum timeout value. | |
5775 struct timespec abst; | |
5776 compute_abstime(&abst, millis); | |
5777 | |
5778 int ret = OS_TIMEOUT; | |
5779 int status = pthread_mutex_lock(_mutex); | |
5780 assert_status(status == 0, status, "mutex_lock"); | |
5781 guarantee (_nParked == 0, "invariant") ; | |
5782 ++_nParked ; | |
5783 | |
5784 // Object.wait(timo) will return because of | |
5785 // (a) notification | |
5786 // (b) timeout | |
5787 // (c) thread.interrupt | |
5788 // | |
5789 // Thread.interrupt and object.notify{All} both call Event::set. | |
5790 // That is, we treat thread.interrupt as a special case of notification. | |
5791 // The underlying Solaris implementation, cond_timedwait, admits | |
5792 // spurious/premature wakeups, but the JLS/JVM spec prevents the | |
5793 // JVM from making those visible to Java code. As such, we must | |
5794 // filter out spurious wakeups. We assume all ETIME returns are valid. | |
5795 // | |
5796 // TODO: properly differentiate simultaneous notify+interrupt. | |
5797 // In that case, we should propagate the notify to another waiter. | |
5798 | |
5799 while (_Event < 0) { | |
5800 status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst); | |
5801 if (status != 0 && WorkAroundNPTLTimedWaitHang) { | |
5802 pthread_cond_destroy (_cond); | |
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5803 pthread_cond_init (_cond, os::Linux::condAttr()) ; |
0 | 5804 } |
5805 assert_status(status == 0 || status == EINTR || | |
5806 status == ETIME || status == ETIMEDOUT, | |
5807 status, "cond_timedwait"); | |
5808 if (!FilterSpuriousWakeups) break ; // previous semantics | |
5809 if (status == ETIME || status == ETIMEDOUT) break ; | |
5810 // We consume and ignore EINTR and spurious wakeups. | |
5811 } | |
5812 --_nParked ; | |
5813 if (_Event >= 0) { | |
5814 ret = OS_OK; | |
5815 } | |
5816 _Event = 0 ; | |
5817 status = pthread_mutex_unlock(_mutex); | |
5818 assert_status(status == 0, status, "mutex_unlock"); | |
5819 assert (_nParked == 0, "invariant") ; | |
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5820 // Paranoia to ensure our locked and lock-free paths interact |
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5821 // correctly with each other. |
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|
5822 OrderAccess::fence(); |
0 | 5823 return ret; |
5824 } | |
5825 | |
5826 void os::PlatformEvent::unpark() { | |
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5827 // Transitions for _Event: |
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|
5828 // 0 :=> 1 |
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|
5829 // 1 :=> 1 |
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|
5830 // -1 :=> either 0 or 1; must signal target thread |
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5831 // That is, we can safely transition _Event from -1 to either |
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5832 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back |
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5833 // unpark() calls. |
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|
5834 // See also: "Semaphores in Plan 9" by Mullender & Cox |
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|
5835 // |
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|
5836 // Note: Forcing a transition from "-1" to "1" on an unpark() means |
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5837 // that it will take two back-to-back park() calls for the owning |
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5838 // thread to block. This has the benefit of forcing a spurious return |
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5839 // from the first park() call after an unpark() call which will help |
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5840 // shake out uses of park() and unpark() without condition variables. |
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|
5841 |
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|
5842 if (Atomic::xchg(1, &_Event) >= 0) return; |
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|
5843 |
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|
5844 // Wait for the thread associated with the event to vacate |
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|
5845 int status = pthread_mutex_lock(_mutex); |
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|
5846 assert_status(status == 0, status, "mutex_lock"); |
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5847 int AnyWaiters = _nParked; |
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5848 assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
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|
5849 if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
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|
5850 AnyWaiters = 0; |
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|
5851 pthread_cond_signal(_cond); |
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|
5852 } |
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|
5853 status = pthread_mutex_unlock(_mutex); |
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|
5854 assert_status(status == 0, status, "mutex_unlock"); |
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5855 if (AnyWaiters != 0) { |
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5856 status = pthread_cond_signal(_cond); |
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|
5857 assert_status(status == 0, status, "cond_signal"); |
0 | 5858 } |
5859 | |
5860 // Note that we signal() _after dropping the lock for "immortal" Events. | |
5861 // This is safe and avoids a common class of futile wakeups. In rare | |
5862 // circumstances this can cause a thread to return prematurely from | |
5863 // cond_{timed}wait() but the spurious wakeup is benign and the victim will | |
5864 // simply re-test the condition and re-park itself. | |
5865 } | |
5866 | |
5867 | |
5868 // JSR166 | |
5869 // ------------------------------------------------------- | |
5870 | |
5871 /* | |
5872 * The solaris and linux implementations of park/unpark are fairly | |
5873 * conservative for now, but can be improved. They currently use a | |
5874 * mutex/condvar pair, plus a a count. | |
5875 * Park decrements count if > 0, else does a condvar wait. Unpark | |
5876 * sets count to 1 and signals condvar. Only one thread ever waits | |
5877 * on the condvar. Contention seen when trying to park implies that someone | |
5878 * is unparking you, so don't wait. And spurious returns are fine, so there | |
5879 * is no need to track notifications. | |
5880 */ | |
5881 | |
5882 /* | |
5883 * This code is common to linux and solaris and will be moved to a | |
5884 * common place in dolphin. | |
5885 * | |
5886 * The passed in time value is either a relative time in nanoseconds | |
5887 * or an absolute time in milliseconds. Either way it has to be unpacked | |
5888 * into suitable seconds and nanoseconds components and stored in the | |
5889 * given timespec structure. | |
5890 * Given time is a 64-bit value and the time_t used in the timespec is only | |
5891 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
5892 * overflow if times way in the future are given. Further on Solaris versions | |
5893 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
5894 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
5895 * As it will be 28 years before "now + 100000000" will overflow we can | |
5896 * ignore overflow and just impose a hard-limit on seconds using the value | |
5897 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
5898 * years from "now". | |
5899 */ | |
5900 | |
5901 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
5902 assert (time > 0, "convertTime"); | |
12211
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5903 time_t max_secs = 0; |
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5904 |
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5905 if (!os::Linux::supports_monotonic_clock() || isAbsolute) { |
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|
5906 struct timeval now; |
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5907 int status = gettimeofday(&now, NULL); |
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5908 assert(status == 0, "gettimeofday"); |
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5909 |
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|
5910 max_secs = now.tv_sec + MAX_SECS; |
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5911 |
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|
5912 if (isAbsolute) { |
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|
5913 jlong secs = time / 1000; |
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|
5914 if (secs > max_secs) { |
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|
5915 absTime->tv_sec = max_secs; |
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|
5916 } else { |
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|
5917 absTime->tv_sec = secs; |
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|
5918 } |
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|
5919 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
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|
5920 } else { |
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|
5921 jlong secs = time / NANOSECS_PER_SEC; |
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5922 if (secs >= MAX_SECS) { |
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|
5923 absTime->tv_sec = max_secs; |
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|
5924 absTime->tv_nsec = 0; |
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|
5925 } else { |
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|
5926 absTime->tv_sec = now.tv_sec + secs; |
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|
5927 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
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|
5928 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
2e6938dd68f2
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|
5929 absTime->tv_nsec -= NANOSECS_PER_SEC; |
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|
5930 ++absTime->tv_sec; // note: this must be <= max_secs |
2e6938dd68f2
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|
5931 } |
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|
5932 } |
0 | 5933 } |
12211
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|
5934 } else { |
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|
5935 // must be relative using monotonic clock |
2e6938dd68f2
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|
5936 struct timespec now; |
2e6938dd68f2
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|
5937 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
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|
5938 assert_status(status == 0, status, "clock_gettime"); |
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|
5939 max_secs = now.tv_sec + MAX_SECS; |
0 | 5940 jlong secs = time / NANOSECS_PER_SEC; |
5941 if (secs >= MAX_SECS) { | |
5942 absTime->tv_sec = max_secs; | |
5943 absTime->tv_nsec = 0; | |
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|
5944 } else { |
0 | 5945 absTime->tv_sec = now.tv_sec + secs; |
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|
5946 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_nsec; |
0 | 5947 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
5948 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
5949 ++absTime->tv_sec; // note: this must be <= max_secs | |
5950 } | |
5951 } | |
5952 } | |
5953 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
5954 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
5955 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
5956 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
5957 } | |
5958 | |
5959 void Parker::park(bool isAbsolute, jlong time) { | |
7629
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|
5960 // Ideally we'd do something useful while spinning, such |
22ba8c8ce6a6
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|
5961 // as calling unpackTime(). |
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|
5962 |
0 | 5963 // Optional fast-path check: |
5964 // Return immediately if a permit is available. | |
7629
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|
5965 // We depend on Atomic::xchg() having full barrier semantics |
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|
5966 // since we are doing a lock-free update to _counter. |
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|
5967 if (Atomic::xchg(0, &_counter) > 0) return; |
0 | 5968 |
5969 Thread* thread = Thread::current(); | |
5970 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
5971 JavaThread *jt = (JavaThread *)thread; | |
5972 | |
5973 // Optional optimization -- avoid state transitions if there's an interrupt pending. | |
5974 // Check interrupt before trying to wait | |
5975 if (Thread::is_interrupted(thread, false)) { | |
5976 return; | |
5977 } | |
5978 | |
5979 // Next, demultiplex/decode time arguments | |
5980 timespec absTime; | |
1865
1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
acorn
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1750
diff
changeset
|
5981 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
0 | 5982 return; |
5983 } | |
5984 if (time > 0) { | |
5985 unpackTime(&absTime, isAbsolute, time); | |
5986 } | |
5987 | |
5988 | |
5989 // Enter safepoint region | |
5990 // Beware of deadlocks such as 6317397. | |
5991 // The per-thread Parker:: mutex is a classic leaf-lock. | |
5992 // In particular a thread must never block on the Threads_lock while | |
5993 // holding the Parker:: mutex. If safepoints are pending both the | |
5994 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
5995 ThreadBlockInVM tbivm(jt); | |
5996 | |
5997 // Don't wait if cannot get lock since interference arises from | |
5998 // unblocking. Also. check interrupt before trying wait | |
5999 if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { | |
6000 return; | |
6001 } | |
6002 | |
6003 int status ; | |
6004 if (_counter > 0) { // no wait needed | |
6005 _counter = 0; | |
6006 status = pthread_mutex_unlock(_mutex); | |
6007 assert (status == 0, "invariant") ; | |
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|
6008 // Paranoia to ensure our locked and lock-free paths interact |
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|
6009 // correctly with each other and Java-level accesses. |
1117
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1010
diff
changeset
|
6010 OrderAccess::fence(); |
0 | 6011 return; |
6012 } | |
6013 | |
6014 #ifdef ASSERT | |
6015 // Don't catch signals while blocked; let the running threads have the signals. | |
6016 // (This allows a debugger to break into the running thread.) | |
6017 sigset_t oldsigs; | |
6018 sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals(); | |
6019 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
6020 #endif | |
6021 | |
6022 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
6023 jt->set_suspend_equivalent(); | |
6024 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
6025 | |
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|
6026 assert(_cur_index == -1, "invariant"); |
0 | 6027 if (time == 0) { |
12211
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|
6028 _cur_index = REL_INDEX; // arbitrary choice when not timed |
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|
6029 status = pthread_cond_wait (&_cond[_cur_index], _mutex) ; |
0 | 6030 } else { |
12211
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|
6031 _cur_index = isAbsolute ? ABS_INDEX : REL_INDEX; |
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|
6032 status = os::Linux::safe_cond_timedwait (&_cond[_cur_index], _mutex, &absTime) ; |
0 | 6033 if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
12211
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|
6034 pthread_cond_destroy (&_cond[_cur_index]) ; |
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|
6035 pthread_cond_init (&_cond[_cur_index], isAbsolute ? NULL : os::Linux::condAttr()); |
0 | 6036 } |
6037 } | |
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|
6038 _cur_index = -1; |
0 | 6039 assert_status(status == 0 || status == EINTR || |
6040 status == ETIME || status == ETIMEDOUT, | |
6041 status, "cond_timedwait"); | |
6042 | |
6043 #ifdef ASSERT | |
6044 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); | |
6045 #endif | |
6046 | |
6047 _counter = 0 ; | |
6048 status = pthread_mutex_unlock(_mutex) ; | |
6049 assert_status(status == 0, status, "invariant") ; | |
7629
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|
6050 // Paranoia to ensure our locked and lock-free paths interact |
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|
6051 // correctly with each other and Java-level accesses. |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6052 OrderAccess::fence(); |
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
6053 |
0 | 6054 // If externally suspended while waiting, re-suspend |
6055 if (jt->handle_special_suspend_equivalent_condition()) { | |
6056 jt->java_suspend_self(); | |
6057 } | |
6058 } | |
6059 | |
6060 void Parker::unpark() { | |
6061 int s, status ; | |
6062 status = pthread_mutex_lock(_mutex); | |
6063 assert (status == 0, "invariant") ; | |
6064 s = _counter; | |
6065 _counter = 1; | |
6066 if (s < 1) { | |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6067 // thread might be parked |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6068 if (_cur_index != -1) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6069 // thread is definitely parked |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6070 if (WorkAroundNPTLTimedWaitHang) { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6071 status = pthread_cond_signal (&_cond[_cur_index]); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6072 assert (status == 0, "invariant"); |
0 | 6073 status = pthread_mutex_unlock(_mutex); |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6074 assert (status == 0, "invariant"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6075 } else { |
23418
54203a323126
8029453: java/util/concurrent/locks/ReentrantLock/TimeoutLockLoops.java failed by timeout
dholmes
parents:
23020
diff
changeset
|
6076 // must capture correct index before unlocking |
54203a323126
8029453: java/util/concurrent/locks/ReentrantLock/TimeoutLockLoops.java failed by timeout
dholmes
parents:
23020
diff
changeset
|
6077 int index = _cur_index; |
0 | 6078 status = pthread_mutex_unlock(_mutex); |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6079 assert (status == 0, "invariant"); |
23418
54203a323126
8029453: java/util/concurrent/locks/ReentrantLock/TimeoutLockLoops.java failed by timeout
dholmes
parents:
23020
diff
changeset
|
6080 status = pthread_cond_signal (&_cond[index]); |
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6081 assert (status == 0, "invariant"); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6082 } |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6083 } else { |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6084 pthread_mutex_unlock(_mutex); |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6085 assert (status == 0, "invariant") ; |
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6086 } |
0 | 6087 } else { |
6088 pthread_mutex_unlock(_mutex); | |
6089 assert (status == 0, "invariant") ; | |
6090 } | |
6091 } | |
6092 | |
6093 | |
6094 extern char** environ; | |
6095 | |
6096 // Run the specified command in a separate process. Return its exit value, | |
6097 // or -1 on failure (e.g. can't fork a new process). | |
6098 // Unlike system(), this function can be called from signal handler. It | |
6099 // doesn't block SIGINT et al. | |
6100 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
|
6101 const char * argv[4] = {"sh", "-c", cmd, NULL}; |
0 | 6102 |
22989
915ca3e9d15e
8078470: [Linux] Replace syscall use in os::fork_and_exec with glibc fork() and execve()
dholmes
parents:
22883
diff
changeset
|
6103 pid_t pid = fork(); |
0 | 6104 |
6105 if (pid < 0) { | |
6106 // fork failed | |
6107 return -1; | |
6108 | |
6109 } else if (pid == 0) { | |
6110 // child process | |
6111 | |
22989
915ca3e9d15e
8078470: [Linux] Replace syscall use in os::fork_and_exec with glibc fork() and execve()
dholmes
parents:
22883
diff
changeset
|
6112 execve("/bin/sh", (char* const*)argv, environ); |
0 | 6113 |
6114 // execve failed | |
6115 _exit(-1); | |
6116 | |
6117 } else { | |
6118 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
6119 // care about the actual exit code, for now. | |
6120 | |
6121 int status; | |
6122 | |
6123 // Wait for the child process to exit. This returns immediately if | |
6124 // the child has already exited. */ | |
6125 while (waitpid(pid, &status, 0) < 0) { | |
6126 switch (errno) { | |
6127 case ECHILD: return 0; | |
6128 case EINTR: break; | |
6129 default: return -1; | |
6130 } | |
6131 } | |
6132 | |
6133 if (WIFEXITED(status)) { | |
6134 // The child exited normally; get its exit code. | |
6135 return WEXITSTATUS(status); | |
6136 } else if (WIFSIGNALED(status)) { | |
6137 // The child exited because of a signal | |
6138 // The best value to return is 0x80 + signal number, | |
6139 // because that is what all Unix shells do, and because | |
6140 // it allows callers to distinguish between process exit and | |
6141 // process death by signal. | |
6142 return 0x80 + WTERMSIG(status); | |
6143 } else { | |
6144 // Unknown exit code; pass it through | |
6145 return status; | |
6146 } | |
6147 } | |
6148 } | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6149 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6150 // is_headless_jre() |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6151 // |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6152 // 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
|
6153 // 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
|
6154 // |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6155 // 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
|
6156 // 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
|
6157 // |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6158 bool os::is_headless_jre() { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6159 struct stat statbuf; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6160 char buf[MAXPATHLEN]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6161 char libmawtpath[MAXPATHLEN]; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6162 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
|
6163 const char *new_xawtstr = "/libawt_xawt.so"; |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6164 char *p; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6165 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6166 // Get path to libjvm.so |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6167 os::jvm_path(buf, sizeof(buf)); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6168 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6169 // Get rid of libjvm.so |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6170 p = strrchr(buf, '/'); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6171 if (p == NULL) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6172 else *p = '\0'; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6173 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6174 // Get rid of client or server |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6175 p = strrchr(buf, '/'); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6176 if (p == NULL) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6177 else *p = '\0'; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6178 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6179 // check xawt/libmawt.so |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6180 strcpy(libmawtpath, buf); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6181 strcat(libmawtpath, xawtstr); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6182 if (::stat(libmawtpath, &statbuf) == 0) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6183 |
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6184 // check libawt_xawt.so |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6185 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
|
6186 strcat(libmawtpath, new_xawtstr); |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6187 if (::stat(libmawtpath, &statbuf) == 0) return false; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6188 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6189 return true; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6190 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6191 |
6200
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6192 // Get the default path to the core file |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6193 // Returns the length of the string |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6194 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
|
6195 const char* p = get_current_directory(buffer, bufferSize); |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6196 |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6197 if (p == NULL) { |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6198 assert(p != NULL, "failed to get current directory"); |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6199 return 0; |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6200 } |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6201 |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6202 return strlen(buffer); |
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6203 } |
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6204 |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6205 /////////////// Unit tests /////////////// |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6206 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6207 #ifndef PRODUCT |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6208 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6209 #define test_log(...) \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6210 do {\ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6211 if (VerboseInternalVMTests) { \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6212 tty->print_cr(__VA_ARGS__); \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6213 tty->flush(); \ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6214 }\ |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6215 } while (false) |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6216 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6217 class TestReserveMemorySpecial : AllStatic { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6218 public: |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6219 static void small_page_write(void* addr, size_t size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6220 size_t page_size = os::vm_page_size(); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6221 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6222 char* end = (char*)addr + size; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6223 for (char* p = (char*)addr; p < end; p += page_size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6224 *p = 1; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6225 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6226 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6227 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6228 static void test_reserve_memory_special_huge_tlbfs_only(size_t size) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6229 if (!UseHugeTLBFS) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6230 return; |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6231 } |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6232 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6233 test_log("test_reserve_memory_special_huge_tlbfs_only(" SIZE_FORMAT ")", size); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6234 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6235 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_only(size, NULL, false); |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6236 |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6237 if (addr != NULL) { |
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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6238 small_page_write(addr, size); |
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|
6239 |
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|
6240 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
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6241 } |
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|
6242 } |
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|
6243 |
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|
6244 static void test_reserve_memory_special_huge_tlbfs_only() { |
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|
6245 if (!UseHugeTLBFS) { |
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|
6246 return; |
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|
6247 } |
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|
6248 |
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6249 size_t lp = os::large_page_size(); |
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6250 |
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|
6251 for (size_t size = lp; size <= lp * 10; size += lp) { |
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6252 test_reserve_memory_special_huge_tlbfs_only(size); |
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|
6253 } |
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|
6254 } |
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|
6255 |
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|
6256 static void test_reserve_memory_special_huge_tlbfs_mixed() { |
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6257 size_t lp = os::large_page_size(); |
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6258 size_t ag = os::vm_allocation_granularity(); |
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6259 |
24006
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6260 // sizes to test |
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6261 const size_t sizes[] = { |
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6262 lp, lp + ag, lp + lp / 2, lp * 2, |
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6263 lp * 2 + ag, lp * 2 - ag, lp * 2 + lp / 2, |
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6264 lp * 10, lp * 10 + lp / 2 |
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6265 }; |
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6266 const int num_sizes = sizeof(sizes) / sizeof(size_t); |
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6267 |
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6268 // For each size/alignment combination, we test three scenarios: |
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6269 // 1) with req_addr == NULL |
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6270 // 2) with a non-null req_addr at which we expect to successfully allocate |
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6271 // 3) with a non-null req_addr which contains a pre-existing mapping, at which we |
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6272 // expect the allocation to either fail or to ignore req_addr |
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6273 |
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6274 // Pre-allocate two areas; they shall be as large as the largest allocation |
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6275 // and aligned to the largest alignment we will be testing. |
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6276 const size_t mapping_size = sizes[num_sizes - 1] * 2; |
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6277 char* const mapping1 = (char*) ::mmap(NULL, mapping_size, |
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6278 PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, |
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6279 -1, 0); |
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|
6280 assert(mapping1 != MAP_FAILED, "should work"); |
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6281 |
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6282 char* const mapping2 = (char*) ::mmap(NULL, mapping_size, |
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6283 PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE, |
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6284 -1, 0); |
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|
6285 assert(mapping2 != MAP_FAILED, "should work"); |
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|
6286 |
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6287 // Unmap the first mapping, but leave the second mapping intact: the first |
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6288 // mapping will serve as a value for a "good" req_addr (case 2). The second |
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6289 // mapping, still intact, as "bad" req_addr (case 3). |
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6290 ::munmap(mapping1, mapping_size); |
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6291 |
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6292 // Case 1 |
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6293 test_log("%s, req_addr NULL:", __FUNCTION__); |
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6294 test_log("size align result"); |
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6295 |
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6296 for (int i = 0; i < num_sizes; i++) { |
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6297 const size_t size = sizes[i]; |
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6298 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
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6299 char* p = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, NULL, false); |
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6300 test_log(SIZE_FORMAT_HEX " " SIZE_FORMAT_HEX " -> " PTR_FORMAT " %s", |
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6301 size, alignment, p, (p != NULL ? "" : "(failed)")); |
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6302 if (p != NULL) { |
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|
6303 assert(is_ptr_aligned(p, alignment), "must be"); |
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|
6304 small_page_write(p, size); |
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|
6305 os::Linux::release_memory_special_huge_tlbfs(p, size); |
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6306 } |
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|
6307 } |
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|
6308 } |
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|
6309 |
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6310 // Case 2 |
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|
6311 test_log("%s, req_addr non-NULL:", __FUNCTION__); |
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|
6312 test_log("size align req_addr result"); |
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|
6313 |
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|
6314 for (int i = 0; i < num_sizes; i++) { |
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|
6315 const size_t size = sizes[i]; |
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6316 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
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6317 char* const req_addr = (char*) align_ptr_up(mapping1, alignment); |
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6318 char* p = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, req_addr, false); |
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6319 test_log(SIZE_FORMAT_HEX " " SIZE_FORMAT_HEX " " PTR_FORMAT " -> " PTR_FORMAT " %s", |
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6320 size, alignment, req_addr, p, |
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6321 ((p != NULL ? (p == req_addr ? "(exact match)" : "") : "(failed)"))); |
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|
6322 if (p != NULL) { |
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|
6323 assert(p == req_addr, "must be"); |
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|
6324 small_page_write(p, size); |
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|
6325 os::Linux::release_memory_special_huge_tlbfs(p, size); |
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|
6326 } |
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|
6327 } |
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|
6328 } |
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|
6329 |
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|
6330 // Case 3 |
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|
6331 test_log("%s, req_addr non-NULL with preexisting mapping:", __FUNCTION__); |
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6332 test_log("size align req_addr result"); |
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|
6333 |
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|
6334 for (int i = 0; i < num_sizes; i++) { |
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|
6335 const size_t size = sizes[i]; |
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|
6336 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
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|
6337 char* const req_addr = (char*) align_ptr_up(mapping2, alignment); |
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|
6338 char* p = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, req_addr, false); |
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|
6339 test_log(SIZE_FORMAT_HEX " " SIZE_FORMAT_HEX " " PTR_FORMAT " -> " PTR_FORMAT " %s", |
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|
6340 size, alignment, req_addr, p, |
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6341 ((p != NULL ? "" : "(failed)"))); |
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6342 // as the area around req_addr contains already existing mappings, the API should always |
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6343 // return NULL (as per contract, it cannot return another address) |
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|
6344 assert(p == NULL, "must be"); |
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6345 } |
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6346 } |
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6347 |
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6348 ::munmap(mapping2, mapping_size); |
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6349 |
12110
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6350 } |
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6351 |
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6352 static void test_reserve_memory_special_huge_tlbfs() { |
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6353 if (!UseHugeTLBFS) { |
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6354 return; |
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6355 } |
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6356 |
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6357 test_reserve_memory_special_huge_tlbfs_only(); |
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6358 test_reserve_memory_special_huge_tlbfs_mixed(); |
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6359 } |
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6360 |
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6361 static void test_reserve_memory_special_shm(size_t size, size_t alignment) { |
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6362 if (!UseSHM) { |
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6363 return; |
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6364 } |
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6365 |
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6366 test_log("test_reserve_memory_special_shm(" SIZE_FORMAT ", " SIZE_FORMAT ")", size, alignment); |
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6367 |
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6368 char* addr = os::Linux::reserve_memory_special_shm(size, alignment, NULL, false); |
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6369 |
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6370 if (addr != NULL) { |
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6371 assert(is_ptr_aligned(addr, alignment), "Check"); |
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6372 assert(is_ptr_aligned(addr, os::large_page_size()), "Check"); |
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6373 |
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6374 small_page_write(addr, size); |
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6375 |
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6376 os::Linux::release_memory_special_shm(addr, size); |
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6377 } |
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6378 } |
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|
6379 |
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6380 static void test_reserve_memory_special_shm() { |
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6381 size_t lp = os::large_page_size(); |
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6382 size_t ag = os::vm_allocation_granularity(); |
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6383 |
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6384 for (size_t size = ag; size < lp * 3; size += ag) { |
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6385 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
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6386 test_reserve_memory_special_shm(size, alignment); |
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6387 } |
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6388 } |
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6389 } |
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|
6390 |
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6391 static void test() { |
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6392 test_reserve_memory_special_huge_tlbfs(); |
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6393 test_reserve_memory_special_shm(); |
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6394 } |
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|
6395 }; |
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|
6396 |
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6397 void TestReserveMemorySpecial_test() { |
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6398 TestReserveMemorySpecial::test(); |
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6399 } |
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6400 |
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6401 #endif |