Mercurial > hg > graal-jvmci-8
annotate src/os/linux/vm/os_linux.cpp @ 17845:21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
Reviewed-by: dholmes, dsamersoff
Contributed-by: andreas.eriksson@oracle.com
| author | kevinw |
|---|---|
| date | Wed, 02 Apr 2014 18:40:52 +0200 |
| parents | 56e7f5560e60 |
| children | 6048424d3865 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 17765 | 2 * Copyright (c) 1999, 2014, 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" | |
| 52 #include "runtime/osThread.hpp" | |
| 53 #include "runtime/perfMemory.hpp" | |
| 54 #include "runtime/sharedRuntime.hpp" | |
| 55 #include "runtime/statSampler.hpp" | |
| 56 #include "runtime/stubRoutines.hpp" | |
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57 #include "runtime/thread.inline.hpp" |
| 1972 | 58 #include "runtime/threadCritical.hpp" |
| 59 #include "runtime/timer.hpp" | |
| 60 #include "services/attachListener.hpp" | |
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61 #include "services/memTracker.hpp" |
| 1972 | 62 #include "services/runtimeService.hpp" |
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63 #include "utilities/decoder.hpp" |
| 1972 | 64 #include "utilities/defaultStream.hpp" |
| 65 #include "utilities/events.hpp" | |
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66 #include "utilities/elfFile.hpp" |
| 1972 | 67 #include "utilities/growableArray.hpp" |
| 68 #include "utilities/vmError.hpp" | |
| 0 | 69 |
| 70 // put OS-includes here | |
| 71 # include <sys/types.h> | |
| 72 # include <sys/mman.h> | |
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73 # include <sys/stat.h> |
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74 # include <sys/select.h> |
| 0 | 75 # include <pthread.h> |
| 76 # include <signal.h> | |
| 77 # include <errno.h> | |
| 78 # include <dlfcn.h> | |
| 79 # include <stdio.h> | |
| 80 # include <unistd.h> | |
| 81 # include <sys/resource.h> | |
| 82 # include <pthread.h> | |
| 83 # include <sys/stat.h> | |
| 84 # include <sys/time.h> | |
| 85 # include <sys/times.h> | |
| 86 # include <sys/utsname.h> | |
| 87 # include <sys/socket.h> | |
| 88 # include <sys/wait.h> | |
| 89 # include <pwd.h> | |
| 90 # include <poll.h> | |
| 91 # include <semaphore.h> | |
| 92 # include <fcntl.h> | |
| 93 # include <string.h> | |
| 94 # include <syscall.h> | |
| 95 # include <sys/sysinfo.h> | |
| 96 # include <gnu/libc-version.h> | |
| 97 # include <sys/ipc.h> | |
| 98 # include <sys/shm.h> | |
| 99 # include <link.h> | |
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100 # include <stdint.h> |
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101 # include <inttypes.h> |
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102 # include <sys/ioctl.h> |
| 0 | 103 |
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104 // if RUSAGE_THREAD for getrusage() has not been defined, do it here. The code calling |
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105 // getrusage() is prepared to handle the associated failure. |
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106 #ifndef RUSAGE_THREAD |
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107 #define RUSAGE_THREAD (1) /* only the calling thread */ |
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108 #endif |
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109 |
| 0 | 110 #define MAX_PATH (2 * K) |
| 111 | |
| 17738 | 112 #define MAX_SECS 100000000 |
| 113 | |
| 0 | 114 // for timer info max values which include all bits |
| 115 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
| 116 | |
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117 #define LARGEPAGES_BIT (1 << 6) |
| 0 | 118 //////////////////////////////////////////////////////////////////////////////// |
| 119 // global variables | |
| 120 julong os::Linux::_physical_memory = 0; | |
| 121 | |
| 122 address os::Linux::_initial_thread_stack_bottom = NULL; | |
| 123 uintptr_t os::Linux::_initial_thread_stack_size = 0; | |
| 124 | |
| 125 int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL; | |
| 126 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL; | |
| 127 Mutex* os::Linux::_createThread_lock = NULL; | |
| 128 pthread_t os::Linux::_main_thread; | |
| 129 int os::Linux::_page_size = -1; | |
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130 const int os::Linux::_vm_default_page_size = (8 * K); |
| 0 | 131 bool os::Linux::_is_floating_stack = false; |
| 132 bool os::Linux::_is_NPTL = false; | |
| 133 bool os::Linux::_supports_fast_thread_cpu_time = false; | |
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134 const char * os::Linux::_glibc_version = NULL; |
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135 const char * os::Linux::_libpthread_version = NULL; |
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136 pthread_condattr_t os::Linux::_condattr[1]; |
| 0 | 137 |
| 138 static jlong initial_time_count=0; | |
| 139 | |
| 140 static int clock_tics_per_sec = 100; | |
| 141 | |
| 142 // For diagnostics to print a message once. see run_periodic_checks | |
| 143 static sigset_t check_signal_done; | |
| 14391 | 144 static bool check_signals = true; |
| 0 | 145 |
| 146 static pid_t _initial_pid = 0; | |
| 147 | |
| 148 /* Signal number used to suspend/resume a thread */ | |
| 149 | |
| 150 /* do not use any signal number less than SIGSEGV, see 4355769 */ | |
| 151 static int SR_signum = SIGUSR2; | |
| 152 sigset_t SR_sigset; | |
| 153 | |
| 242 | 154 /* Used to protect dlsym() calls */ |
| 155 static pthread_mutex_t dl_mutex; | |
| 156 | |
| 10405 | 157 // Declarations |
| 158 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); | |
| 159 | |
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160 #ifdef JAVASE_EMBEDDED |
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161 class MemNotifyThread: public Thread { |
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162 friend class VMStructs; |
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163 public: |
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164 virtual void run(); |
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165 |
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166 private: |
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167 static MemNotifyThread* _memnotify_thread; |
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168 int _fd; |
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169 |
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170 public: |
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171 |
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172 // Constructor |
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173 MemNotifyThread(int fd); |
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174 |
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175 // Tester |
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176 bool is_memnotify_thread() const { return true; } |
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177 |
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178 // Printing |
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179 char* name() const { return (char*)"Linux MemNotify Thread"; } |
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180 |
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181 // Returns the single instance of the MemNotifyThread |
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182 static MemNotifyThread* memnotify_thread() { return _memnotify_thread; } |
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183 |
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184 // Create and start the single instance of MemNotifyThread |
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185 static void start(); |
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186 }; |
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187 #endif // JAVASE_EMBEDDED |
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188 |
| 0 | 189 // utility functions |
| 190 | |
| 191 static int SR_initialize(); | |
| 192 | |
| 193 julong os::available_memory() { | |
| 194 return Linux::available_memory(); | |
| 195 } | |
| 196 | |
| 197 julong os::Linux::available_memory() { | |
| 198 // values in struct sysinfo are "unsigned long" | |
| 199 struct sysinfo si; | |
| 200 sysinfo(&si); | |
| 201 | |
| 202 return (julong)si.freeram * si.mem_unit; | |
| 203 } | |
| 204 | |
| 205 julong os::physical_memory() { | |
| 206 return Linux::physical_memory(); | |
| 207 } | |
| 208 | |
| 209 //////////////////////////////////////////////////////////////////////////////// | |
| 210 // environment support | |
| 211 | |
| 212 bool os::getenv(const char* name, char* buf, int len) { | |
| 213 const char* val = ::getenv(name); | |
| 214 if (val != NULL && strlen(val) < (size_t)len) { | |
| 215 strcpy(buf, val); | |
| 216 return true; | |
| 217 } | |
| 218 if (len > 0) buf[0] = 0; // return a null string | |
| 219 return false; | |
| 220 } | |
| 221 | |
| 222 | |
| 223 // Return true if user is running as root. | |
| 224 | |
| 225 bool os::have_special_privileges() { | |
| 226 static bool init = false; | |
| 227 static bool privileges = false; | |
| 228 if (!init) { | |
| 229 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
| 230 init = true; | |
| 231 } | |
| 232 return privileges; | |
| 233 } | |
| 234 | |
| 235 | |
| 236 #ifndef SYS_gettid | |
| 237 // i386: 224, ia64: 1105, amd64: 186, sparc 143 | |
| 238 #ifdef __ia64__ | |
| 239 #define SYS_gettid 1105 | |
| 240 #elif __i386__ | |
| 241 #define SYS_gettid 224 | |
| 242 #elif __amd64__ | |
| 243 #define SYS_gettid 186 | |
| 244 #elif __sparc__ | |
| 245 #define SYS_gettid 143 | |
| 246 #else | |
| 247 #error define gettid for the arch | |
| 248 #endif | |
| 249 #endif | |
| 250 | |
| 251 // Cpu architecture string | |
| 1010 | 252 #if defined(ZERO) |
| 253 static char cpu_arch[] = ZERO_LIBARCH; | |
| 254 #elif defined(IA64) | |
| 0 | 255 static char cpu_arch[] = "ia64"; |
| 256 #elif defined(IA32) | |
| 257 static char cpu_arch[] = "i386"; | |
| 258 #elif defined(AMD64) | |
| 259 static char cpu_arch[] = "amd64"; | |
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260 #elif defined(ARM) |
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261 static char cpu_arch[] = "arm"; |
| 14390 | 262 #elif defined(PPC32) |
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263 static char cpu_arch[] = "ppc"; |
| 14391 | 264 #elif defined(PPC64) |
| 265 static char cpu_arch[] = "ppc64"; | |
| 0 | 266 #elif defined(SPARC) |
| 267 # ifdef _LP64 | |
| 268 static char cpu_arch[] = "sparcv9"; | |
| 269 # else | |
| 270 static char cpu_arch[] = "sparc"; | |
| 271 # endif | |
| 272 #else | |
| 273 #error Add appropriate cpu_arch setting | |
| 274 #endif | |
| 275 | |
| 276 | |
| 277 // pid_t gettid() | |
| 278 // | |
| 279 // Returns the kernel thread id of the currently running thread. Kernel | |
| 280 // thread id is used to access /proc. | |
| 281 // | |
| 282 // (Note that getpid() on LinuxThreads returns kernel thread id too; but | |
| 283 // on NPTL, it returns the same pid for all threads, as required by POSIX.) | |
| 284 // | |
| 285 pid_t os::Linux::gettid() { | |
| 286 int rslt = syscall(SYS_gettid); | |
| 287 if (rslt == -1) { | |
| 288 // old kernel, no NPTL support | |
| 289 return getpid(); | |
| 290 } else { | |
| 291 return (pid_t)rslt; | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 // Most versions of linux have a bug where the number of processors are | |
| 296 // determined by looking at the /proc file system. In a chroot environment, | |
| 297 // the system call returns 1. This causes the VM to act as if it is | |
| 298 // a single processor and elide locking (see is_MP() call). | |
| 299 static bool unsafe_chroot_detected = false; | |
|
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300 static const char *unstable_chroot_error = "/proc file system not found.\n" |
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301 "Java may be unstable running multithreaded in a chroot " |
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302 "environment on Linux when /proc filesystem is not mounted."; |
| 0 | 303 |
| 304 void os::Linux::initialize_system_info() { | |
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305 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); |
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306 if (processor_count() == 1) { |
| 0 | 307 pid_t pid = os::Linux::gettid(); |
| 308 char fname[32]; | |
| 309 jio_snprintf(fname, sizeof(fname), "/proc/%d", pid); | |
| 310 FILE *fp = fopen(fname, "r"); | |
| 311 if (fp == NULL) { | |
| 312 unsafe_chroot_detected = true; | |
| 313 } else { | |
| 314 fclose(fp); | |
| 315 } | |
| 316 } | |
| 317 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
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318 assert(processor_count() > 0, "linux error"); |
| 0 | 319 } |
| 320 | |
| 321 void os::init_system_properties_values() { | |
| 322 // char arch[12]; | |
| 323 // sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); | |
| 324 | |
| 325 // The next steps are taken in the product version: | |
| 326 // | |
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327 // Obtain the JAVA_HOME value from the location of libjvm.so. |
| 0 | 328 // This library should be located at: |
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329 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
| 0 | 330 // |
| 331 // If "/jre/lib/" appears at the right place in the path, then we | |
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332 // assume libjvm.so is installed in a JDK and we use this path. |
| 0 | 333 // |
| 334 // Otherwise exit with message: "Could not create the Java virtual machine." | |
| 335 // | |
| 336 // The following extra steps are taken in the debugging version: | |
| 337 // | |
| 338 // If "/jre/lib/" does NOT appear at the right place in the path | |
| 339 // instead of exit check for $JAVA_HOME environment variable. | |
| 340 // | |
| 341 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
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342 // then we append a fake suffix "hotspot/libjvm.so" to this path so |
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343 // it looks like libjvm.so is installed there |
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344 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
| 0 | 345 // |
| 346 // Otherwise exit. | |
| 347 // | |
| 348 // Important note: if the location of libjvm.so changes this | |
| 349 // code needs to be changed accordingly. | |
| 350 | |
| 351 // The next few definitions allow the code to be verbatim: | |
| 6197 | 352 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) |
| 0 | 353 #define getenv(n) ::getenv(n) |
| 354 | |
| 355 /* | |
| 356 * See ld(1): | |
| 357 * The linker uses the following search paths to locate required | |
| 358 * shared libraries: | |
| 359 * 1: ... | |
| 360 * ... | |
| 361 * 7: The default directories, normally /lib and /usr/lib. | |
| 362 */ | |
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363 #if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390)) |
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364 #define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib" |
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365 #else |
| 0 | 366 #define DEFAULT_LIBPATH "/lib:/usr/lib" |
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367 #endif |
| 0 | 368 |
| 369 #define EXTENSIONS_DIR "/lib/ext" | |
| 370 #define ENDORSED_DIR "/lib/endorsed" | |
| 371 #define REG_DIR "/usr/java/packages" | |
| 372 | |
| 373 { | |
| 374 /* sysclasspath, java_home, dll_dir */ | |
| 375 { | |
| 376 char *home_path; | |
| 377 char *dll_path; | |
| 378 char *pslash; | |
| 379 char buf[MAXPATHLEN]; | |
| 380 os::jvm_path(buf, sizeof(buf)); | |
| 381 | |
| 382 // Found the full path to libjvm.so. | |
| 383 // Now cut the path to <java_home>/jre if we can. | |
| 384 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ | |
| 385 pslash = strrchr(buf, '/'); | |
| 386 if (pslash != NULL) | |
| 387 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ | |
| 388 dll_path = malloc(strlen(buf) + 1); | |
| 389 if (dll_path == NULL) | |
| 390 return; | |
| 391 strcpy(dll_path, buf); | |
| 392 Arguments::set_dll_dir(dll_path); | |
| 393 | |
| 394 if (pslash != NULL) { | |
| 395 pslash = strrchr(buf, '/'); | |
| 396 if (pslash != NULL) { | |
| 397 *pslash = '\0'; /* get rid of /<arch> */ | |
| 398 pslash = strrchr(buf, '/'); | |
| 399 if (pslash != NULL) | |
| 400 *pslash = '\0'; /* get rid of /lib */ | |
| 401 } | |
| 402 } | |
| 403 | |
| 404 home_path = malloc(strlen(buf) + 1); | |
| 405 if (home_path == NULL) | |
| 406 return; | |
| 407 strcpy(home_path, buf); | |
| 408 Arguments::set_java_home(home_path); | |
| 409 | |
| 410 if (!set_boot_path('/', ':')) | |
| 411 return; | |
| 412 } | |
| 413 | |
| 414 /* | |
| 415 * Where to look for native libraries | |
| 416 * | |
| 417 * Note: Due to a legacy implementation, most of the library path | |
| 418 * is set in the launcher. This was to accomodate linking restrictions | |
| 419 * on legacy Linux implementations (which are no longer supported). | |
| 420 * Eventually, all the library path setting will be done here. | |
| 421 * | |
| 422 * However, to prevent the proliferation of improperly built native | |
| 423 * libraries, the new path component /usr/java/packages is added here. | |
| 424 * Eventually, all the library path setting will be done here. | |
| 425 */ | |
| 426 { | |
| 427 char *ld_library_path; | |
| 428 | |
| 429 /* | |
| 430 * Construct the invariant part of ld_library_path. Note that the | |
| 431 * space for the colon and the trailing null are provided by the | |
| 432 * nulls included by the sizeof operator (so actually we allocate | |
| 433 * a byte more than necessary). | |
| 434 */ | |
| 435 ld_library_path = (char *) malloc(sizeof(REG_DIR) + sizeof("/lib/") + | |
| 436 strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH)); | |
| 437 sprintf(ld_library_path, REG_DIR "/lib/%s:" DEFAULT_LIBPATH, cpu_arch); | |
| 438 | |
| 439 /* | |
| 440 * Get the user setting of LD_LIBRARY_PATH, and prepended it. It | |
| 441 * should always exist (until the legacy problem cited above is | |
| 442 * addressed). | |
| 443 */ | |
| 444 char *v = getenv("LD_LIBRARY_PATH"); | |
| 445 if (v != NULL) { | |
| 446 char *t = ld_library_path; | |
| 447 /* That's +1 for the colon and +1 for the trailing '\0' */ | |
| 448 ld_library_path = (char *) malloc(strlen(v) + 1 + strlen(t) + 1); | |
| 449 sprintf(ld_library_path, "%s:%s", v, t); | |
| 450 } | |
| 451 Arguments::set_library_path(ld_library_path); | |
| 452 } | |
| 453 | |
| 454 /* | |
| 455 * Extensions directories. | |
| 456 * | |
| 457 * Note that the space for the colon and the trailing null are provided | |
| 458 * by the nulls included by the sizeof operator (so actually one byte more | |
| 459 * than necessary is allocated). | |
| 460 */ | |
| 461 { | |
| 462 char *buf = malloc(strlen(Arguments::get_java_home()) + | |
| 463 sizeof(EXTENSIONS_DIR) + sizeof(REG_DIR) + sizeof(EXTENSIONS_DIR)); | |
| 464 sprintf(buf, "%s" EXTENSIONS_DIR ":" REG_DIR EXTENSIONS_DIR, | |
| 465 Arguments::get_java_home()); | |
| 466 Arguments::set_ext_dirs(buf); | |
| 467 } | |
| 468 | |
| 469 /* Endorsed standards default directory. */ | |
| 470 { | |
| 471 char * buf; | |
| 472 buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); | |
| 473 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); | |
| 474 Arguments::set_endorsed_dirs(buf); | |
| 475 } | |
| 476 } | |
| 477 | |
| 478 #undef malloc | |
| 479 #undef getenv | |
| 480 #undef EXTENSIONS_DIR | |
| 481 #undef ENDORSED_DIR | |
| 482 | |
| 483 // Done | |
| 484 return; | |
| 485 } | |
| 486 | |
| 487 //////////////////////////////////////////////////////////////////////////////// | |
| 488 // breakpoint support | |
| 489 | |
| 490 void os::breakpoint() { | |
| 491 BREAKPOINT; | |
| 492 } | |
| 493 | |
| 494 extern "C" void breakpoint() { | |
| 495 // use debugger to set breakpoint here | |
| 496 } | |
| 497 | |
| 498 //////////////////////////////////////////////////////////////////////////////// | |
| 499 // signal support | |
| 500 | |
| 501 debug_only(static bool signal_sets_initialized = false); | |
| 502 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
| 503 | |
| 504 bool os::Linux::is_sig_ignored(int sig) { | |
| 505 struct sigaction oact; | |
| 506 sigaction(sig, (struct sigaction*)NULL, &oact); | |
| 507 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
| 508 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
| 509 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
| 510 return true; | |
| 511 else | |
| 512 return false; | |
| 513 } | |
| 514 | |
| 515 void os::Linux::signal_sets_init() { | |
| 516 // Should also have an assertion stating we are still single-threaded. | |
| 517 assert(!signal_sets_initialized, "Already initialized"); | |
| 518 // Fill in signals that are necessarily unblocked for all threads in | |
| 519 // the VM. Currently, we unblock the following signals: | |
| 520 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
| 521 // by -Xrs (=ReduceSignalUsage)); | |
| 522 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
| 523 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
| 524 // the dispositions or masks wrt these signals. | |
| 525 // Programs embedding the VM that want to use the above signals for their | |
| 526 // own purposes must, at this time, use the "-Xrs" option to prevent | |
| 527 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
| 528 // (See bug 4345157, and other related bugs). | |
| 529 // In reality, though, unblocking these signals is really a nop, since | |
| 530 // these signals are not blocked by default. | |
| 531 sigemptyset(&unblocked_sigs); | |
| 532 sigemptyset(&allowdebug_blocked_sigs); | |
| 533 sigaddset(&unblocked_sigs, SIGILL); | |
| 534 sigaddset(&unblocked_sigs, SIGSEGV); | |
| 535 sigaddset(&unblocked_sigs, SIGBUS); | |
| 536 sigaddset(&unblocked_sigs, SIGFPE); | |
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537 #if defined(PPC64) |
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538 sigaddset(&unblocked_sigs, SIGTRAP); |
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539 #endif |
| 0 | 540 sigaddset(&unblocked_sigs, SR_signum); |
| 541 | |
| 542 if (!ReduceSignalUsage) { | |
| 543 if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
| 544 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
| 545 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
| 546 } | |
| 547 if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
| 548 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
| 549 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
| 550 } | |
| 551 if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
| 552 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
| 553 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
| 554 } | |
| 555 } | |
| 556 // Fill in signals that are blocked by all but the VM thread. | |
| 557 sigemptyset(&vm_sigs); | |
| 558 if (!ReduceSignalUsage) | |
| 559 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
| 560 debug_only(signal_sets_initialized = true); | |
| 561 | |
| 562 } | |
| 563 | |
| 564 // These are signals that are unblocked while a thread is running Java. | |
| 565 // (For some reason, they get blocked by default.) | |
| 566 sigset_t* os::Linux::unblocked_signals() { | |
| 567 assert(signal_sets_initialized, "Not initialized"); | |
| 568 return &unblocked_sigs; | |
| 569 } | |
| 570 | |
| 571 // These are the signals that are blocked while a (non-VM) thread is | |
| 572 // running Java. Only the VM thread handles these signals. | |
| 573 sigset_t* os::Linux::vm_signals() { | |
| 574 assert(signal_sets_initialized, "Not initialized"); | |
| 575 return &vm_sigs; | |
| 576 } | |
| 577 | |
| 578 // These are signals that are blocked during cond_wait to allow debugger in | |
| 579 sigset_t* os::Linux::allowdebug_blocked_signals() { | |
| 580 assert(signal_sets_initialized, "Not initialized"); | |
| 581 return &allowdebug_blocked_sigs; | |
| 582 } | |
| 583 | |
| 584 void os::Linux::hotspot_sigmask(Thread* thread) { | |
| 585 | |
| 586 //Save caller's signal mask before setting VM signal mask | |
| 587 sigset_t caller_sigmask; | |
| 588 pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); | |
| 589 | |
| 590 OSThread* osthread = thread->osthread(); | |
| 591 osthread->set_caller_sigmask(caller_sigmask); | |
| 592 | |
| 593 pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL); | |
| 594 | |
| 595 if (!ReduceSignalUsage) { | |
| 596 if (thread->is_VM_thread()) { | |
| 597 // Only the VM thread handles BREAK_SIGNAL ... | |
| 598 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); | |
| 599 } else { | |
| 600 // ... all other threads block BREAK_SIGNAL | |
| 601 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); | |
| 602 } | |
| 603 } | |
| 604 } | |
| 605 | |
| 606 ////////////////////////////////////////////////////////////////////////////// | |
| 607 // detecting pthread library | |
| 608 | |
| 609 void os::Linux::libpthread_init() { | |
| 610 // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION | |
| 611 // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a | |
| 612 // generic name for earlier versions. | |
| 613 // Define macros here so we can build HotSpot on old systems. | |
| 614 # ifndef _CS_GNU_LIBC_VERSION | |
| 615 # define _CS_GNU_LIBC_VERSION 2 | |
| 616 # endif | |
| 617 # ifndef _CS_GNU_LIBPTHREAD_VERSION | |
| 618 # define _CS_GNU_LIBPTHREAD_VERSION 3 | |
| 619 # endif | |
| 620 | |
| 621 size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0); | |
| 622 if (n > 0) { | |
| 6197 | 623 char *str = (char *)malloc(n, mtInternal); |
| 0 | 624 confstr(_CS_GNU_LIBC_VERSION, str, n); |
| 625 os::Linux::set_glibc_version(str); | |
| 626 } else { | |
| 627 // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() | |
| 628 static char _gnu_libc_version[32]; | |
| 629 jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), | |
| 630 "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); | |
| 631 os::Linux::set_glibc_version(_gnu_libc_version); | |
| 632 } | |
| 633 | |
| 634 n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0); | |
| 635 if (n > 0) { | |
| 6197 | 636 char *str = (char *)malloc(n, mtInternal); |
| 0 | 637 confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n); |
| 638 // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells | |
| 639 // us "NPTL-0.29" even we are running with LinuxThreads. Check if this | |
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640 // is the case. LinuxThreads has a hard limit on max number of threads. |
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641 // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value. |
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642 // On the other hand, NPTL does not have such a limit, sysconf() |
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643 // will return -1 and errno is not changed. Check if it is really NPTL. |
| 0 | 644 if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 && |
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645 strstr(str, "NPTL") && |
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646 sysconf(_SC_THREAD_THREADS_MAX) > 0) { |
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647 free(str); |
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648 os::Linux::set_libpthread_version("linuxthreads"); |
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649 } else { |
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650 os::Linux::set_libpthread_version(str); |
| 0 | 651 } |
| 652 } else { | |
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653 // glibc before 2.3.2 only has LinuxThreads. |
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654 os::Linux::set_libpthread_version("linuxthreads"); |
| 0 | 655 } |
| 656 | |
| 657 if (strstr(libpthread_version(), "NPTL")) { | |
| 658 os::Linux::set_is_NPTL(); | |
| 659 } else { | |
| 660 os::Linux::set_is_LinuxThreads(); | |
| 661 } | |
| 662 | |
| 663 // LinuxThreads have two flavors: floating-stack mode, which allows variable | |
| 664 // stack size; and fixed-stack mode. NPTL is always floating-stack. | |
| 665 if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) { | |
| 666 os::Linux::set_is_floating_stack(); | |
| 667 } | |
| 668 } | |
| 669 | |
| 670 ///////////////////////////////////////////////////////////////////////////// | |
| 671 // thread stack | |
| 672 | |
| 673 // Force Linux kernel to expand current thread stack. If "bottom" is close | |
| 674 // to the stack guard, caller should block all signals. | |
| 675 // | |
| 676 // MAP_GROWSDOWN: | |
| 677 // A special mmap() flag that is used to implement thread stacks. It tells | |
| 678 // kernel that the memory region should extend downwards when needed. This | |
| 679 // allows early versions of LinuxThreads to only mmap the first few pages | |
| 680 // when creating a new thread. Linux kernel will automatically expand thread | |
| 681 // stack as needed (on page faults). | |
| 682 // | |
| 683 // However, because the memory region of a MAP_GROWSDOWN stack can grow on | |
| 684 // demand, if a page fault happens outside an already mapped MAP_GROWSDOWN | |
| 685 // region, it's hard to tell if the fault is due to a legitimate stack | |
| 686 // access or because of reading/writing non-exist memory (e.g. buffer | |
| 687 // overrun). As a rule, if the fault happens below current stack pointer, | |
| 688 // Linux kernel does not expand stack, instead a SIGSEGV is sent to the | |
| 689 // application (see Linux kernel fault.c). | |
| 690 // | |
| 691 // This Linux feature can cause SIGSEGV when VM bangs thread stack for | |
| 692 // stack overflow detection. | |
| 693 // | |
| 694 // Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do | |
| 695 // not use this flag. However, the stack of initial thread is not created | |
| 696 // by pthread, it is still MAP_GROWSDOWN. Also it's possible (though | |
| 697 // unlikely) that user code can create a thread with MAP_GROWSDOWN stack | |
| 698 // and then attach the thread to JVM. | |
| 699 // | |
| 700 // To get around the problem and allow stack banging on Linux, we need to | |
| 701 // manually expand thread stack after receiving the SIGSEGV. | |
| 702 // | |
| 703 // There are two ways to expand thread stack to address "bottom", we used | |
| 704 // both of them in JVM before 1.5: | |
| 705 // 1. adjust stack pointer first so that it is below "bottom", and then | |
| 706 // touch "bottom" | |
| 707 // 2. mmap() the page in question | |
| 708 // | |
| 709 // Now alternate signal stack is gone, it's harder to use 2. For instance, | |
| 710 // if current sp is already near the lower end of page 101, and we need to | |
| 711 // call mmap() to map page 100, it is possible that part of the mmap() frame | |
| 712 // will be placed in page 100. When page 100 is mapped, it is zero-filled. | |
| 713 // That will destroy the mmap() frame and cause VM to crash. | |
| 714 // | |
| 715 // The following code works by adjusting sp first, then accessing the "bottom" | |
| 716 // page to force a page fault. Linux kernel will then automatically expand the | |
| 717 // stack mapping. | |
| 718 // | |
| 719 // _expand_stack_to() assumes its frame size is less than page size, which | |
| 720 // should always be true if the function is not inlined. | |
| 721 | |
| 722 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute | |
| 723 #define NOINLINE | |
| 724 #else | |
| 725 #define NOINLINE __attribute__ ((noinline)) | |
| 726 #endif | |
| 727 | |
| 728 static void _expand_stack_to(address bottom) NOINLINE; | |
| 729 | |
| 730 static void _expand_stack_to(address bottom) { | |
| 731 address sp; | |
| 732 size_t size; | |
| 733 volatile char *p; | |
| 734 | |
| 735 // Adjust bottom to point to the largest address within the same page, it | |
| 736 // gives us a one-page buffer if alloca() allocates slightly more memory. | |
| 737 bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size()); | |
| 738 bottom += os::Linux::page_size() - 1; | |
| 739 | |
| 740 // sp might be slightly above current stack pointer; if that's the case, we | |
| 741 // will alloca() a little more space than necessary, which is OK. Don't use | |
| 742 // os::current_stack_pointer(), as its result can be slightly below current | |
| 743 // stack pointer, causing us to not alloca enough to reach "bottom". | |
| 744 sp = (address)&sp; | |
| 745 | |
| 746 if (sp > bottom) { | |
| 747 size = sp - bottom; | |
| 748 p = (volatile char *)alloca(size); | |
| 749 assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?"); | |
| 750 p[0] = '\0'; | |
| 751 } | |
| 752 } | |
| 753 | |
| 754 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) { | |
| 755 assert(t!=NULL, "just checking"); | |
| 756 assert(t->osthread()->expanding_stack(), "expand should be set"); | |
| 757 assert(t->stack_base() != NULL, "stack_base was not initialized"); | |
| 758 | |
| 759 if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) { | |
| 760 sigset_t mask_all, old_sigset; | |
| 761 sigfillset(&mask_all); | |
| 762 pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset); | |
| 763 _expand_stack_to(addr); | |
| 764 pthread_sigmask(SIG_SETMASK, &old_sigset, NULL); | |
| 765 return true; | |
| 766 } | |
| 767 return false; | |
| 768 } | |
| 769 | |
| 770 ////////////////////////////////////////////////////////////////////////////// | |
| 771 // create new thread | |
| 772 | |
| 773 static address highest_vm_reserved_address(); | |
| 774 | |
| 775 // check if it's safe to start a new thread | |
| 776 static bool _thread_safety_check(Thread* thread) { | |
| 777 if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) { | |
| 778 // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat) | |
| 779 // Heap is mmap'ed at lower end of memory space. Thread stacks are | |
| 780 // allocated (MAP_FIXED) from high address space. Every thread stack | |
| 781 // occupies a fixed size slot (usually 2Mbytes, but user can change | |
| 782 // it to other values if they rebuild LinuxThreads). | |
| 783 // | |
| 784 // Problem with MAP_FIXED is that mmap() can still succeed even part of | |
| 785 // the memory region has already been mmap'ed. That means if we have too | |
| 786 // many threads and/or very large heap, eventually thread stack will | |
| 787 // collide with heap. | |
| 788 // | |
| 789 // Here we try to prevent heap/stack collision by comparing current | |
| 790 // stack bottom with the highest address that has been mmap'ed by JVM | |
| 791 // plus a safety margin for memory maps created by native code. | |
| 792 // | |
| 793 // This feature can be disabled by setting ThreadSafetyMargin to 0 | |
| 794 // | |
| 795 if (ThreadSafetyMargin > 0) { | |
| 796 address stack_bottom = os::current_stack_base() - os::current_stack_size(); | |
| 797 | |
| 798 // not safe if our stack extends below the safety margin | |
| 799 return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address(); | |
| 800 } else { | |
| 801 return true; | |
| 802 } | |
| 803 } else { | |
| 804 // Floating stack LinuxThreads or NPTL: | |
| 805 // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When | |
| 806 // there's not enough space left, pthread_create() will fail. If we come | |
| 807 // here, that means enough space has been reserved for stack. | |
| 808 return true; | |
| 809 } | |
| 810 } | |
| 811 | |
| 812 // Thread start routine for all newly created threads | |
| 813 static void *java_start(Thread *thread) { | |
| 814 // Try to randomize the cache line index of hot stack frames. | |
| 815 // This helps when threads of the same stack traces evict each other's | |
| 816 // cache lines. The threads can be either from the same JVM instance, or | |
| 817 // from different JVM instances. The benefit is especially true for | |
| 818 // processors with hyperthreading technology. | |
| 819 static int counter = 0; | |
| 820 int pid = os::current_process_id(); | |
| 821 alloca(((pid ^ counter++) & 7) * 128); | |
| 822 | |
| 823 ThreadLocalStorage::set_thread(thread); | |
| 824 | |
| 825 OSThread* osthread = thread->osthread(); | |
| 826 Monitor* sync = osthread->startThread_lock(); | |
| 827 | |
| 828 // non floating stack LinuxThreads needs extra check, see above | |
| 829 if (!_thread_safety_check(thread)) { | |
| 830 // notify parent thread | |
| 831 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 832 osthread->set_state(ZOMBIE); | |
| 833 sync->notify_all(); | |
| 834 return NULL; | |
| 835 } | |
| 836 | |
| 837 // thread_id is kernel thread id (similar to Solaris LWP id) | |
| 838 osthread->set_thread_id(os::Linux::gettid()); | |
| 839 | |
| 840 if (UseNUMA) { | |
| 841 int lgrp_id = os::numa_get_group_id(); | |
| 842 if (lgrp_id != -1) { | |
| 843 thread->set_lgrp_id(lgrp_id); | |
| 844 } | |
| 845 } | |
| 846 // initialize signal mask for this thread | |
| 847 os::Linux::hotspot_sigmask(thread); | |
| 848 | |
| 849 // initialize floating point control register | |
| 850 os::Linux::init_thread_fpu_state(); | |
| 851 | |
| 852 // handshaking with parent thread | |
| 853 { | |
| 854 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 855 | |
| 856 // notify parent thread | |
| 857 osthread->set_state(INITIALIZED); | |
| 858 sync->notify_all(); | |
| 859 | |
| 860 // wait until os::start_thread() | |
| 861 while (osthread->get_state() == INITIALIZED) { | |
| 862 sync->wait(Mutex::_no_safepoint_check_flag); | |
| 863 } | |
| 864 } | |
| 865 | |
| 866 // call one more level start routine | |
| 867 thread->run(); | |
| 868 | |
| 869 return 0; | |
| 870 } | |
| 871 | |
| 872 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 873 assert(thread->osthread() == NULL, "caller responsible"); | |
| 874 | |
| 875 // Allocate the OSThread object | |
| 876 OSThread* osthread = new OSThread(NULL, NULL); | |
| 877 if (osthread == NULL) { | |
| 878 return false; | |
| 879 } | |
| 880 | |
| 881 // set the correct thread state | |
| 882 osthread->set_thread_type(thr_type); | |
| 883 | |
| 884 // Initial state is ALLOCATED but not INITIALIZED | |
| 885 osthread->set_state(ALLOCATED); | |
| 886 | |
| 887 thread->set_osthread(osthread); | |
| 888 | |
| 889 // init thread attributes | |
| 890 pthread_attr_t attr; | |
| 891 pthread_attr_init(&attr); | |
| 892 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
| 893 | |
| 894 // stack size | |
| 895 if (os::Linux::supports_variable_stack_size()) { | |
| 896 // calculate stack size if it's not specified by caller | |
| 897 if (stack_size == 0) { | |
| 898 stack_size = os::Linux::default_stack_size(thr_type); | |
| 899 | |
| 900 switch (thr_type) { | |
| 901 case os::java_thread: | |
|
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902 // Java threads use ThreadStackSize which default value can be |
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903 // changed with the flag -Xss |
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904 assert (JavaThread::stack_size_at_create() > 0, "this should be set"); |
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905 stack_size = JavaThread::stack_size_at_create(); |
| 0 | 906 break; |
| 907 case os::compiler_thread: | |
| 908 if (CompilerThreadStackSize > 0) { | |
| 909 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 910 break; | |
| 911 } // else fall through: | |
| 912 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 913 case os::vm_thread: | |
| 914 case os::pgc_thread: | |
| 915 case os::cgc_thread: | |
| 916 case os::watcher_thread: | |
| 917 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 918 break; | |
| 919 } | |
| 920 } | |
| 921 | |
| 922 stack_size = MAX2(stack_size, os::Linux::min_stack_allowed); | |
| 923 pthread_attr_setstacksize(&attr, stack_size); | |
| 924 } else { | |
| 925 // let pthread_create() pick the default value. | |
| 926 } | |
| 927 | |
| 928 // glibc guard page | |
| 929 pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type)); | |
| 930 | |
| 931 ThreadState state; | |
| 932 | |
| 933 { | |
| 934 // Serialize thread creation if we are running with fixed stack LinuxThreads | |
| 935 bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack(); | |
| 936 if (lock) { | |
| 937 os::Linux::createThread_lock()->lock_without_safepoint_check(); | |
| 938 } | |
| 939 | |
| 940 pthread_t tid; | |
| 941 int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); | |
| 942 | |
| 943 pthread_attr_destroy(&attr); | |
| 944 | |
| 945 if (ret != 0) { | |
| 946 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 947 perror("pthread_create()"); | |
| 948 } | |
| 949 // Need to clean up stuff we've allocated so far | |
| 950 thread->set_osthread(NULL); | |
| 951 delete osthread; | |
| 952 if (lock) os::Linux::createThread_lock()->unlock(); | |
| 953 return false; | |
| 954 } | |
| 955 | |
| 956 // Store pthread info into the OSThread | |
| 957 osthread->set_pthread_id(tid); | |
| 958 | |
| 959 // Wait until child thread is either initialized or aborted | |
| 960 { | |
| 961 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 962 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 963 while ((state = osthread->get_state()) == ALLOCATED) { | |
| 964 sync_with_child->wait(Mutex::_no_safepoint_check_flag); | |
| 965 } | |
| 966 } | |
| 967 | |
| 968 if (lock) { | |
| 969 os::Linux::createThread_lock()->unlock(); | |
| 970 } | |
| 971 } | |
| 972 | |
| 973 // Aborted due to thread limit being reached | |
| 974 if (state == ZOMBIE) { | |
| 975 thread->set_osthread(NULL); | |
| 976 delete osthread; | |
| 977 return false; | |
| 978 } | |
| 979 | |
| 980 // The thread is returned suspended (in state INITIALIZED), | |
| 981 // and is started higher up in the call chain | |
| 982 assert(state == INITIALIZED, "race condition"); | |
| 983 return true; | |
| 984 } | |
| 985 | |
| 986 ///////////////////////////////////////////////////////////////////////////// | |
| 987 // attach existing thread | |
| 988 | |
| 989 // bootstrap the main thread | |
| 990 bool os::create_main_thread(JavaThread* thread) { | |
| 991 assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread"); | |
| 992 return create_attached_thread(thread); | |
| 993 } | |
| 994 | |
| 995 bool os::create_attached_thread(JavaThread* thread) { | |
| 996 #ifdef ASSERT | |
| 997 thread->verify_not_published(); | |
| 998 #endif | |
| 999 | |
| 1000 // Allocate the OSThread object | |
| 1001 OSThread* osthread = new OSThread(NULL, NULL); | |
| 1002 | |
| 1003 if (osthread == NULL) { | |
| 1004 return false; | |
| 1005 } | |
| 1006 | |
| 1007 // Store pthread info into the OSThread | |
| 1008 osthread->set_thread_id(os::Linux::gettid()); | |
| 1009 osthread->set_pthread_id(::pthread_self()); | |
| 1010 | |
| 1011 // initialize floating point control register | |
| 1012 os::Linux::init_thread_fpu_state(); | |
| 1013 | |
| 1014 // Initial thread state is RUNNABLE | |
| 1015 osthread->set_state(RUNNABLE); | |
| 1016 | |
| 1017 thread->set_osthread(osthread); | |
| 1018 | |
| 1019 if (UseNUMA) { | |
| 1020 int lgrp_id = os::numa_get_group_id(); | |
| 1021 if (lgrp_id != -1) { | |
| 1022 thread->set_lgrp_id(lgrp_id); | |
| 1023 } | |
| 1024 } | |
| 1025 | |
| 1026 if (os::Linux::is_initial_thread()) { | |
| 1027 // If current thread is initial thread, its stack is mapped on demand, | |
| 1028 // see notes about MAP_GROWSDOWN. Here we try to force kernel to map | |
| 1029 // the entire stack region to avoid SEGV in stack banging. | |
| 1030 // It is also useful to get around the heap-stack-gap problem on SuSE | |
| 1031 // kernel (see 4821821 for details). We first expand stack to the top | |
| 1032 // of yellow zone, then enable stack yellow zone (order is significant, | |
| 1033 // enabling yellow zone first will crash JVM on SuSE Linux), so there | |
| 1034 // is no gap between the last two virtual memory regions. | |
| 1035 | |
| 1036 JavaThread *jt = (JavaThread *)thread; | |
| 1037 address addr = jt->stack_yellow_zone_base(); | |
| 1038 assert(addr != NULL, "initialization problem?"); | |
| 1039 assert(jt->stack_available(addr) > 0, "stack guard should not be enabled"); | |
| 1040 | |
| 1041 osthread->set_expanding_stack(); | |
| 1042 os::Linux::manually_expand_stack(jt, addr); | |
| 1043 osthread->clear_expanding_stack(); | |
| 1044 } | |
| 1045 | |
| 1046 // initialize signal mask for this thread | |
| 1047 // and save the caller's signal mask | |
| 1048 os::Linux::hotspot_sigmask(thread); | |
| 1049 | |
| 1050 return true; | |
| 1051 } | |
| 1052 | |
| 1053 void os::pd_start_thread(Thread* thread) { | |
| 1054 OSThread * osthread = thread->osthread(); | |
| 1055 assert(osthread->get_state() != INITIALIZED, "just checking"); | |
| 1056 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 1057 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 1058 sync_with_child->notify(); | |
| 1059 } | |
| 1060 | |
| 1061 // Free Linux resources related to the OSThread | |
| 1062 void os::free_thread(OSThread* osthread) { | |
| 1063 assert(osthread != NULL, "osthread not set"); | |
| 1064 | |
| 1065 if (Thread::current()->osthread() == osthread) { | |
| 1066 // Restore caller's signal mask | |
| 1067 sigset_t sigmask = osthread->caller_sigmask(); | |
| 1068 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); | |
| 1069 } | |
| 1070 | |
| 1071 delete osthread; | |
| 1072 } | |
| 1073 | |
| 1074 ////////////////////////////////////////////////////////////////////////////// | |
| 1075 // thread local storage | |
| 1076 | |
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1077 // Restore the thread pointer if the destructor is called. This is in case |
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1078 // someone from JNI code sets up a destructor with pthread_key_create to run |
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1079 // detachCurrentThread on thread death. Unless we restore the thread pointer we |
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1080 // will hang or crash. When detachCurrentThread is called the key will be set |
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1081 // to null and we will not be called again. If detachCurrentThread is never |
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1082 // called we could loop forever depending on the pthread implementation. |
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1083 static void restore_thread_pointer(void* p) { |
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1084 Thread* thread = (Thread*) p; |
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1085 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); |
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1086 } |
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1087 |
| 0 | 1088 int os::allocate_thread_local_storage() { |
| 1089 pthread_key_t key; | |
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1090 int rslt = pthread_key_create(&key, restore_thread_pointer); |
| 0 | 1091 assert(rslt == 0, "cannot allocate thread local storage"); |
| 1092 return (int)key; | |
| 1093 } | |
| 1094 | |
| 1095 // Note: This is currently not used by VM, as we don't destroy TLS key | |
| 1096 // on VM exit. | |
| 1097 void os::free_thread_local_storage(int index) { | |
| 1098 int rslt = pthread_key_delete((pthread_key_t)index); | |
| 1099 assert(rslt == 0, "invalid index"); | |
| 1100 } | |
| 1101 | |
| 1102 void os::thread_local_storage_at_put(int index, void* value) { | |
| 1103 int rslt = pthread_setspecific((pthread_key_t)index, value); | |
| 1104 assert(rslt == 0, "pthread_setspecific failed"); | |
| 1105 } | |
| 1106 | |
| 1107 extern "C" Thread* get_thread() { | |
| 1108 return ThreadLocalStorage::thread(); | |
| 1109 } | |
| 1110 | |
| 1111 ////////////////////////////////////////////////////////////////////////////// | |
| 1112 // initial thread | |
| 1113 | |
| 1114 // Check if current thread is the initial thread, similar to Solaris thr_main. | |
| 1115 bool os::Linux::is_initial_thread(void) { | |
| 1116 char dummy; | |
| 1117 // If called before init complete, thread stack bottom will be null. | |
| 1118 // Can be called if fatal error occurs before initialization. | |
| 1119 if (initial_thread_stack_bottom() == NULL) return false; | |
| 1120 assert(initial_thread_stack_bottom() != NULL && | |
| 1121 initial_thread_stack_size() != 0, | |
| 1122 "os::init did not locate initial thread's stack region"); | |
| 1123 if ((address)&dummy >= initial_thread_stack_bottom() && | |
| 1124 (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size()) | |
| 1125 return true; | |
| 1126 else return false; | |
| 1127 } | |
| 1128 | |
| 1129 // Find the virtual memory area that contains addr | |
| 1130 static bool find_vma(address addr, address* vma_low, address* vma_high) { | |
| 1131 FILE *fp = fopen("/proc/self/maps", "r"); | |
| 1132 if (fp) { | |
| 1133 address low, high; | |
| 1134 while (!feof(fp)) { | |
| 1135 if (fscanf(fp, "%p-%p", &low, &high) == 2) { | |
| 1136 if (low <= addr && addr < high) { | |
| 1137 if (vma_low) *vma_low = low; | |
| 1138 if (vma_high) *vma_high = high; | |
| 1139 fclose (fp); | |
| 1140 return true; | |
| 1141 } | |
| 1142 } | |
| 1143 for (;;) { | |
| 1144 int ch = fgetc(fp); | |
| 1145 if (ch == EOF || ch == (int)'\n') break; | |
| 1146 } | |
| 1147 } | |
| 1148 fclose(fp); | |
| 1149 } | |
| 1150 return false; | |
| 1151 } | |
| 1152 | |
| 1153 // Locate initial thread stack. This special handling of initial thread stack | |
| 1154 // is needed because pthread_getattr_np() on most (all?) Linux distros returns | |
| 1155 // bogus value for initial thread. | |
| 1156 void os::Linux::capture_initial_stack(size_t max_size) { | |
| 1157 // stack size is the easy part, get it from RLIMIT_STACK | |
| 1158 size_t stack_size; | |
| 1159 struct rlimit rlim; | |
| 1160 getrlimit(RLIMIT_STACK, &rlim); | |
| 1161 stack_size = rlim.rlim_cur; | |
| 1162 | |
| 1163 // 6308388: a bug in ld.so will relocate its own .data section to the | |
| 1164 // lower end of primordial stack; reduce ulimit -s value a little bit | |
| 1165 // so we won't install guard page on ld.so's data section. | |
| 1166 stack_size -= 2 * page_size(); | |
| 1167 | |
| 1168 // 4441425: avoid crash with "unlimited" stack size on SuSE 7.1 or Redhat | |
| 1169 // 7.1, in both cases we will get 2G in return value. | |
| 1170 // 4466587: glibc 2.2.x compiled w/o "--enable-kernel=2.4.0" (RH 7.0, | |
| 1171 // SuSE 7.2, Debian) can not handle alternate signal stack correctly | |
| 1172 // for initial thread if its stack size exceeds 6M. Cap it at 2M, | |
| 1173 // in case other parts in glibc still assumes 2M max stack size. | |
| 1174 // FIXME: alt signal stack is gone, maybe we can relax this constraint? | |
| 1175 // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small | |
| 7994 | 1176 if (stack_size > 2 * K * K IA64_ONLY(*2)) |
| 1177 stack_size = 2 * K * K IA64_ONLY(*2); | |
| 0 | 1178 // Try to figure out where the stack base (top) is. This is harder. |
| 1179 // | |
| 1180 // When an application is started, glibc saves the initial stack pointer in | |
| 1181 // a global variable "__libc_stack_end", which is then used by system | |
| 1182 // libraries. __libc_stack_end should be pretty close to stack top. The | |
| 1183 // variable is available since the very early days. However, because it is | |
| 1184 // a private interface, it could disappear in the future. | |
| 1185 // | |
| 1186 // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar | |
| 1187 // to __libc_stack_end, it is very close to stack top, but isn't the real | |
| 1188 // stack top. Note that /proc may not exist if VM is running as a chroot | |
| 1189 // program, so reading /proc/<pid>/stat could fail. Also the contents of | |
| 1190 // /proc/<pid>/stat could change in the future (though unlikely). | |
| 1191 // | |
| 1192 // We try __libc_stack_end first. If that doesn't work, look for | |
| 1193 // /proc/<pid>/stat. If neither of them works, we use current stack pointer | |
| 1194 // as a hint, which should work well in most cases. | |
| 1195 | |
| 1196 uintptr_t stack_start; | |
| 1197 | |
| 1198 // try __libc_stack_end first | |
| 1199 uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end"); | |
| 1200 if (p && *p) { | |
| 1201 stack_start = *p; | |
| 1202 } else { | |
| 1203 // see if we can get the start_stack field from /proc/self/stat | |
| 1204 FILE *fp; | |
| 1205 int pid; | |
| 1206 char state; | |
| 1207 int ppid; | |
| 1208 int pgrp; | |
| 1209 int session; | |
| 1210 int nr; | |
| 1211 int tpgrp; | |
| 1212 unsigned long flags; | |
| 1213 unsigned long minflt; | |
| 1214 unsigned long cminflt; | |
| 1215 unsigned long majflt; | |
| 1216 unsigned long cmajflt; | |
| 1217 unsigned long utime; | |
| 1218 unsigned long stime; | |
| 1219 long cutime; | |
| 1220 long cstime; | |
| 1221 long prio; | |
| 1222 long nice; | |
| 1223 long junk; | |
| 1224 long it_real; | |
| 1225 uintptr_t start; | |
| 1226 uintptr_t vsize; | |
|
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1227 intptr_t rss; |
|
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1228 uintptr_t rsslim; |
| 0 | 1229 uintptr_t scodes; |
| 1230 uintptr_t ecode; | |
| 1231 int i; | |
| 1232 | |
| 1233 // Figure what the primordial thread stack base is. Code is inspired | |
| 1234 // by email from Hans Boehm. /proc/self/stat begins with current pid, | |
| 1235 // followed by command name surrounded by parentheses, state, etc. | |
| 1236 char stat[2048]; | |
| 1237 int statlen; | |
| 1238 | |
| 1239 fp = fopen("/proc/self/stat", "r"); | |
| 1240 if (fp) { | |
| 1241 statlen = fread(stat, 1, 2047, fp); | |
| 1242 stat[statlen] = '\0'; | |
| 1243 fclose(fp); | |
| 1244 | |
| 1245 // Skip pid and the command string. Note that we could be dealing with | |
| 1246 // weird command names, e.g. user could decide to rename java launcher | |
| 1247 // to "java 1.4.2 :)", then the stat file would look like | |
| 1248 // 1234 (java 1.4.2 :)) R ... ... | |
| 1249 // We don't really need to know the command string, just find the last | |
| 1250 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 1251 char * s = strrchr(stat, ')'); | |
| 1252 | |
| 1253 i = 0; | |
| 1254 if (s) { | |
| 1255 // Skip blank chars | |
| 1256 do s++; while (isspace(*s)); | |
| 1257 | |
|
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1258 #define _UFM UINTX_FORMAT |
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1259 #define _DFM INTX_FORMAT |
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1260 |
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1261 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 */ |
|
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1262 /* 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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1263 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 | 1264 &state, /* 3 %c */ |
| 1265 &ppid, /* 4 %d */ | |
| 1266 &pgrp, /* 5 %d */ | |
| 1267 &session, /* 6 %d */ | |
| 1268 &nr, /* 7 %d */ | |
| 1269 &tpgrp, /* 8 %d */ | |
| 1270 &flags, /* 9 %lu */ | |
| 1271 &minflt, /* 10 %lu */ | |
| 1272 &cminflt, /* 11 %lu */ | |
| 1273 &majflt, /* 12 %lu */ | |
| 1274 &cmajflt, /* 13 %lu */ | |
| 1275 &utime, /* 14 %lu */ | |
| 1276 &stime, /* 15 %lu */ | |
| 1277 &cutime, /* 16 %ld */ | |
| 1278 &cstime, /* 17 %ld */ | |
| 1279 &prio, /* 18 %ld */ | |
| 1280 &nice, /* 19 %ld */ | |
| 1281 &junk, /* 20 %ld */ | |
| 1282 &it_real, /* 21 %ld */ | |
|
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1283 &start, /* 22 UINTX_FORMAT */ |
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1284 &vsize, /* 23 UINTX_FORMAT */ |
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1285 &rss, /* 24 INTX_FORMAT */ |
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1286 &rsslim, /* 25 UINTX_FORMAT */ |
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1287 &scodes, /* 26 UINTX_FORMAT */ |
|
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1288 &ecode, /* 27 UINTX_FORMAT */ |
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1289 &stack_start); /* 28 UINTX_FORMAT */ |
| 0 | 1290 } |
| 1291 | |
|
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1292 #undef _UFM |
|
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1293 #undef _DFM |
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1294 |
| 0 | 1295 if (i != 28 - 2) { |
| 1296 assert(false, "Bad conversion from /proc/self/stat"); | |
| 1297 // product mode - assume we are the initial thread, good luck in the | |
| 1298 // embedded case. | |
| 1299 warning("Can't detect initial thread stack location - bad conversion"); | |
| 1300 stack_start = (uintptr_t) &rlim; | |
| 1301 } | |
| 1302 } else { | |
| 1303 // For some reason we can't open /proc/self/stat (for example, running on | |
| 1304 // FreeBSD with a Linux emulator, or inside chroot), this should work for | |
| 1305 // most cases, so don't abort: | |
| 1306 warning("Can't detect initial thread stack location - no /proc/self/stat"); | |
| 1307 stack_start = (uintptr_t) &rlim; | |
| 1308 } | |
| 1309 } | |
| 1310 | |
| 1311 // Now we have a pointer (stack_start) very close to the stack top, the | |
| 1312 // next thing to do is to figure out the exact location of stack top. We | |
| 1313 // can find out the virtual memory area that contains stack_start by | |
| 1314 // reading /proc/self/maps, it should be the last vma in /proc/self/maps, | |
| 1315 // and its upper limit is the real stack top. (again, this would fail if | |
| 1316 // running inside chroot, because /proc may not exist.) | |
| 1317 | |
| 1318 uintptr_t stack_top; | |
| 1319 address low, high; | |
| 1320 if (find_vma((address)stack_start, &low, &high)) { | |
| 1321 // success, "high" is the true stack top. (ignore "low", because initial | |
| 1322 // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.) | |
| 1323 stack_top = (uintptr_t)high; | |
| 1324 } else { | |
| 1325 // failed, likely because /proc/self/maps does not exist | |
| 1326 warning("Can't detect initial thread stack location - find_vma failed"); | |
| 1327 // best effort: stack_start is normally within a few pages below the real | |
| 1328 // stack top, use it as stack top, and reduce stack size so we won't put | |
| 1329 // guard page outside stack. | |
| 1330 stack_top = stack_start; | |
| 1331 stack_size -= 16 * page_size(); | |
| 1332 } | |
| 1333 | |
| 1334 // stack_top could be partially down the page so align it | |
| 1335 stack_top = align_size_up(stack_top, page_size()); | |
| 1336 | |
| 1337 if (max_size && stack_size > max_size) { | |
| 1338 _initial_thread_stack_size = max_size; | |
| 1339 } else { | |
| 1340 _initial_thread_stack_size = stack_size; | |
| 1341 } | |
| 1342 | |
| 1343 _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size()); | |
| 1344 _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size; | |
| 1345 } | |
| 1346 | |
| 1347 //////////////////////////////////////////////////////////////////////////////// | |
| 1348 // time support | |
| 1349 | |
| 1350 // Time since start-up in seconds to a fine granularity. | |
| 1351 // Used by VMSelfDestructTimer and the MemProfiler. | |
| 1352 double os::elapsedTime() { | |
| 1353 | |
|
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1354 return ((double)os::elapsed_counter()) / os::elapsed_frequency(); // nanosecond resolution |
| 0 | 1355 } |
| 1356 | |
| 1357 jlong os::elapsed_counter() { | |
|
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1358 return javaTimeNanos() - initial_time_count; |
| 0 | 1359 } |
| 1360 | |
| 1361 jlong os::elapsed_frequency() { | |
|
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1362 return NANOSECS_PER_SEC; // nanosecond resolution |
| 0 | 1363 } |
| 1364 | |
|
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1365 bool os::supports_vtime() { return true; } |
|
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1366 bool os::enable_vtime() { return false; } |
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1367 bool os::vtime_enabled() { return false; } |
|
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1368 |
|
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1369 double os::elapsedVTime() { |
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1370 struct rusage usage; |
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1371 int retval = getrusage(RUSAGE_THREAD, &usage); |
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1372 if (retval == 0) { |
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1373 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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1374 } else { |
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1375 // better than nothing, but not much |
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1376 return elapsedTime(); |
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1377 } |
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1378 } |
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1379 |
| 61 | 1380 jlong os::javaTimeMillis() { |
| 0 | 1381 timeval time; |
| 1382 int status = gettimeofday(&time, NULL); | |
| 1383 assert(status != -1, "linux error"); | |
| 1384 return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); | |
| 1385 } | |
| 1386 | |
| 1387 #ifndef CLOCK_MONOTONIC | |
| 1388 #define CLOCK_MONOTONIC (1) | |
| 1389 #endif | |
| 1390 | |
| 1391 void os::Linux::clock_init() { | |
| 1392 // we do dlopen's in this particular order due to bug in linux | |
| 1393 // dynamical loader (see 6348968) leading to crash on exit | |
| 1394 void* handle = dlopen("librt.so.1", RTLD_LAZY); | |
| 1395 if (handle == NULL) { | |
| 1396 handle = dlopen("librt.so", RTLD_LAZY); | |
| 1397 } | |
| 1398 | |
| 1399 if (handle) { | |
| 1400 int (*clock_getres_func)(clockid_t, struct timespec*) = | |
| 1401 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres"); | |
| 1402 int (*clock_gettime_func)(clockid_t, struct timespec*) = | |
| 1403 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime"); | |
| 1404 if (clock_getres_func && clock_gettime_func) { | |
| 1405 // See if monotonic clock is supported by the kernel. Note that some | |
| 1406 // early implementations simply return kernel jiffies (updated every | |
| 1407 // 1/100 or 1/1000 second). It would be bad to use such a low res clock | |
| 1408 // for nano time (though the monotonic property is still nice to have). | |
| 1409 // It's fixed in newer kernels, however clock_getres() still returns | |
| 1410 // 1/HZ. We check if clock_getres() works, but will ignore its reported | |
| 1411 // resolution for now. Hopefully as people move to new kernels, this | |
| 1412 // won't be a problem. | |
| 1413 struct timespec res; | |
| 1414 struct timespec tp; | |
| 1415 if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 && | |
| 1416 clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) { | |
| 1417 // yes, monotonic clock is supported | |
| 1418 _clock_gettime = clock_gettime_func; | |
|
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1419 return; |
| 0 | 1420 } else { |
| 1421 // close librt if there is no monotonic clock | |
| 1422 dlclose(handle); | |
| 1423 } | |
| 1424 } | |
| 1425 } | |
|
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1426 warning("No monotonic clock was available - timed services may " \ |
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1427 "be adversely affected if the time-of-day clock changes"); |
| 0 | 1428 } |
| 1429 | |
| 1430 #ifndef SYS_clock_getres | |
| 1431 | |
| 1432 #if defined(IA32) || defined(AMD64) | |
| 1433 #define SYS_clock_getres IA32_ONLY(266) AMD64_ONLY(229) | |
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1434 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1435 #else |
|
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1436 #warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time" |
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1437 #define sys_clock_getres(x,y) -1 |
| 0 | 1438 #endif |
| 1439 | |
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1440 #else |
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1441 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1442 #endif |
| 1443 | |
| 1444 void os::Linux::fast_thread_clock_init() { | |
| 1445 if (!UseLinuxPosixThreadCPUClocks) { | |
| 1446 return; | |
| 1447 } | |
| 1448 clockid_t clockid; | |
| 1449 struct timespec tp; | |
| 1450 int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) = | |
| 1451 (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid"); | |
| 1452 | |
| 1453 // Switch to using fast clocks for thread cpu time if | |
| 1454 // the sys_clock_getres() returns 0 error code. | |
| 1455 // Note, that some kernels may support the current thread | |
| 1456 // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks | |
| 1457 // returned by the pthread_getcpuclockid(). | |
| 1458 // If the fast Posix clocks are supported then the sys_clock_getres() | |
| 1459 // must return at least tp.tv_sec == 0 which means a resolution | |
| 1460 // better than 1 sec. This is extra check for reliability. | |
| 1461 | |
| 1462 if(pthread_getcpuclockid_func && | |
| 1463 pthread_getcpuclockid_func(_main_thread, &clockid) == 0 && | |
| 1464 sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) { | |
| 1465 | |
| 1466 _supports_fast_thread_cpu_time = true; | |
| 1467 _pthread_getcpuclockid = pthread_getcpuclockid_func; | |
| 1468 } | |
| 1469 } | |
| 1470 | |
| 1471 jlong os::javaTimeNanos() { | |
| 1472 if (Linux::supports_monotonic_clock()) { | |
| 1473 struct timespec tp; | |
| 1474 int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp); | |
| 1475 assert(status == 0, "gettime error"); | |
| 1476 jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); | |
| 1477 return result; | |
| 1478 } else { | |
| 1479 timeval time; | |
| 1480 int status = gettimeofday(&time, NULL); | |
| 1481 assert(status != -1, "linux error"); | |
| 1482 jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); | |
| 1483 return 1000 * usecs; | |
| 1484 } | |
| 1485 } | |
| 1486 | |
| 1487 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 1488 if (Linux::supports_monotonic_clock()) { | |
| 1489 info_ptr->max_value = ALL_64_BITS; | |
| 1490 | |
| 1491 // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past | |
| 1492 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
| 1493 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
| 1494 } else { | |
| 1495 // gettimeofday - based on time in seconds since the Epoch thus does not wrap | |
| 1496 info_ptr->max_value = ALL_64_BITS; | |
| 1497 | |
| 1498 // gettimeofday is a real time clock so it skips | |
| 1499 info_ptr->may_skip_backward = true; | |
| 1500 info_ptr->may_skip_forward = true; | |
| 1501 } | |
| 1502 | |
| 1503 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 1504 } | |
| 1505 | |
| 1506 // Return the real, user, and system times in seconds from an | |
| 1507 // arbitrary fixed point in the past. | |
| 1508 bool os::getTimesSecs(double* process_real_time, | |
| 1509 double* process_user_time, | |
| 1510 double* process_system_time) { | |
| 1511 struct tms ticks; | |
| 1512 clock_t real_ticks = times(&ticks); | |
| 1513 | |
| 1514 if (real_ticks == (clock_t) (-1)) { | |
| 1515 return false; | |
| 1516 } else { | |
| 1517 double ticks_per_second = (double) clock_tics_per_sec; | |
| 1518 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
| 1519 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
| 1520 *process_real_time = ((double) real_ticks) / ticks_per_second; | |
| 1521 | |
| 1522 return true; | |
| 1523 } | |
| 1524 } | |
| 1525 | |
| 1526 | |
| 1527 char * os::local_time_string(char *buf, size_t buflen) { | |
| 1528 struct tm t; | |
| 1529 time_t long_time; | |
| 1530 time(&long_time); | |
| 1531 localtime_r(&long_time, &t); | |
| 1532 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 1533 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
| 1534 t.tm_hour, t.tm_min, t.tm_sec); | |
| 1535 return buf; | |
| 1536 } | |
| 1537 | |
|
548
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|
1538 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
|
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|
1539 return localtime_r(clock, res); |
|
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|
1540 } |
|
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|
1541 |
| 0 | 1542 //////////////////////////////////////////////////////////////////////////////// |
| 1543 // runtime exit support | |
| 1544 | |
| 1545 // Note: os::shutdown() might be called very early during initialization, or | |
| 1546 // called from signal handler. Before adding something to os::shutdown(), make | |
| 1547 // sure it is async-safe and can handle partially initialized VM. | |
| 1548 void os::shutdown() { | |
| 1549 | |
| 1550 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 1551 perfMemory_exit(); | |
| 1552 | |
| 1553 // needs to remove object in file system | |
| 1554 AttachListener::abort(); | |
| 1555 | |
| 1556 // flush buffered output, finish log files | |
| 1557 ostream_abort(); | |
| 1558 | |
| 1559 // Check for abort hook | |
| 1560 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 1561 if (abort_hook != NULL) { | |
| 1562 abort_hook(); | |
| 1563 } | |
| 1564 | |
| 1565 } | |
| 1566 | |
| 1567 // Note: os::abort() might be called very early during initialization, or | |
| 1568 // called from signal handler. Before adding something to os::abort(), make | |
| 1569 // sure it is async-safe and can handle partially initialized VM. | |
| 1570 void os::abort(bool dump_core) { | |
| 1571 os::shutdown(); | |
| 1572 if (dump_core) { | |
| 1573 #ifndef PRODUCT | |
| 1574 fdStream out(defaultStream::output_fd()); | |
| 1575 out.print_raw("Current thread is "); | |
| 1576 char buf[16]; | |
| 1577 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
| 1578 out.print_raw_cr(buf); | |
| 1579 out.print_raw_cr("Dumping core ..."); | |
| 1580 #endif | |
| 1581 ::abort(); // dump core | |
| 1582 } | |
| 1583 | |
| 1584 ::exit(1); | |
| 1585 } | |
| 1586 | |
| 1587 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 1588 void os::die() { | |
| 1589 // _exit() on LinuxThreads only kills current thread | |
| 1590 ::abort(); | |
| 1591 } | |
| 1592 | |
| 1593 // unused on linux for now. | |
| 1594 void os::set_error_file(const char *logfile) {} | |
| 1595 | |
|
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|
1596 |
|
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|
1597 // This method is a copy of JDK's sysGetLastErrorString |
|
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|
1598 // from src/solaris/hpi/src/system_md.c |
|
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|
1599 |
|
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|
1600 size_t os::lasterror(char *buf, size_t len) { |
|
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|
1601 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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|
1602 if (errno == 0) return 0; |
|
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diff
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|
1603 |
|
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6348631: remove the use of the HPI library from Hotspot
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|
1604 const char *s = ::strerror(errno); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
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|
1605 size_t n = ::strlen(s); |
|
828eafbd85cc
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diff
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|
1606 if (n >= len) { |
|
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diff
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|
1607 n = len - 1; |
|
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diff
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|
1608 } |
|
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6348631: remove the use of the HPI library from Hotspot
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diff
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|
1609 ::strncpy(buf, s, n); |
|
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diff
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|
1610 buf[n] = '\0'; |
|
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|
1611 return n; |
|
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|
1612 } |
|
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|
1613 |
| 0 | 1614 intx os::current_thread_id() { return (intx)pthread_self(); } |
| 1615 int os::current_process_id() { | |
| 1616 | |
| 1617 // Under the old linux thread library, linux gives each thread | |
| 1618 // its own process id. Because of this each thread will return | |
| 1619 // a different pid if this method were to return the result | |
| 1620 // of getpid(2). Linux provides no api that returns the pid | |
| 1621 // of the launcher thread for the vm. This implementation | |
| 1622 // returns a unique pid, the pid of the launcher thread | |
| 1623 // that starts the vm 'process'. | |
| 1624 | |
| 1625 // Under the NPTL, getpid() returns the same pid as the | |
| 1626 // launcher thread rather than a unique pid per thread. | |
| 1627 // Use gettid() if you want the old pre NPTL behaviour. | |
| 1628 | |
| 1629 // if you are looking for the result of a call to getpid() that | |
| 1630 // returns a unique pid for the calling thread, then look at the | |
| 1631 // OSThread::thread_id() method in osThread_linux.hpp file | |
| 1632 | |
| 1633 return (int)(_initial_pid ? _initial_pid : getpid()); | |
| 1634 } | |
| 1635 | |
| 1636 // DLL functions | |
| 1637 | |
| 1638 const char* os::dll_file_extension() { return ".so"; } | |
| 1639 | |
|
2130
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
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diff
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|
1640 // This must be hard coded because it's the system's temporary |
|
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
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diff
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|
1641 // directory not the java application's temp directory, ala java.io.tmpdir. |
|
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
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diff
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|
1642 const char* os::get_temp_directory() { return "/tmp"; } |
| 0 | 1643 |
| 691 | 1644 static bool file_exists(const char* filename) { |
| 1645 struct stat statbuf; | |
| 1646 if (filename == NULL || strlen(filename) == 0) { | |
| 1647 return false; | |
| 1648 } | |
| 1649 return os::stat(filename, &statbuf) == 0; | |
| 1650 } | |
| 1651 | |
|
6966
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diff
changeset
|
1652 bool os::dll_build_name(char* buffer, size_t buflen, |
| 691 | 1653 const char* pname, const char* fname) { |
|
6966
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|
1654 bool retval = false; |
| 691 | 1655 // Copied from libhpi |
| 242 | 1656 const size_t pnamelen = pname ? strlen(pname) : 0; |
| 1657 | |
|
6966
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|
1658 // Return error on buffer overflow. |
| 242 | 1659 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
|
6966
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|
1660 return retval; |
| 242 | 1661 } |
| 1662 | |
| 1663 if (pnamelen == 0) { | |
| 691 | 1664 snprintf(buffer, buflen, "lib%s.so", fname); |
|
6966
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diff
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|
1665 retval = true; |
| 691 | 1666 } else if (strchr(pname, *os::path_separator()) != NULL) { |
| 1667 int n; | |
| 1668 char** pelements = split_path(pname, &n); | |
|
9059
17bf4d428955
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
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parents:
8812
diff
changeset
|
1669 if (pelements == NULL) { |
| 9062 | 1670 return false; |
|
9059
17bf4d428955
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ccheung
parents:
8812
diff
changeset
|
1671 } |
| 691 | 1672 for (int i = 0 ; i < n ; i++) { |
| 1673 // Really shouldn't be NULL, but check can't hurt | |
| 1674 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
| 1675 continue; // skip the empty path values | |
| 1676 } | |
| 1677 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
| 1678 if (file_exists(buffer)) { | |
|
6966
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diff
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|
1679 retval = true; |
| 691 | 1680 break; |
| 1681 } | |
| 1682 } | |
| 1683 // release the storage | |
| 1684 for (int i = 0 ; i < n ; i++) { | |
| 1685 if (pelements[i] != NULL) { | |
| 6197 | 1686 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
| 691 | 1687 } |
| 1688 } | |
| 1689 if (pelements != NULL) { | |
| 6197 | 1690 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
| 691 | 1691 } |
| 242 | 1692 } else { |
| 691 | 1693 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
|
6966
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6825
diff
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|
1694 retval = true; |
|
6cb0d32b828b
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6825
diff
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|
1695 } |
|
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6825
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|
1696 return retval; |
| 242 | 1697 } |
| 1698 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
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7206
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|
1699 // check if addr is inside libjvm.so |
| 0 | 1700 bool os::address_is_in_vm(address addr) { |
| 1701 static address libjvm_base_addr; | |
| 1702 Dl_info dlinfo; | |
| 1703 | |
| 1704 if (libjvm_base_addr == NULL) { | |
|
11092
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diff
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|
1705 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
|
59b052799158
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10986
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|
1706 libjvm_base_addr = (address)dlinfo.dli_fbase; |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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diff
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|
1707 } |
| 0 | 1708 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
| 1709 } | |
| 1710 | |
|
11092
59b052799158
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dcubed
parents:
10986
diff
changeset
|
1711 if (dladdr((void *)addr, &dlinfo) != 0) { |
| 0 | 1712 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
| 1713 } | |
| 1714 | |
| 1715 return false; | |
| 1716 } | |
| 1717 | |
| 1718 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1719 int buflen, int *offset) { | |
|
11092
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8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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diff
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|
1720 // buf is not optional, but offset is optional |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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diff
changeset
|
1721 assert(buf != NULL, "sanity check"); |
|
59b052799158
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10986
diff
changeset
|
1722 |
| 0 | 1723 Dl_info dlinfo; |
| 1724 | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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|
1725 if (dladdr((void*)addr, &dlinfo) != 0) { |
|
59b052799158
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diff
changeset
|
1726 // see if we have a matching symbol |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1727 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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|
1728 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1729 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
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1972
diff
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|
1730 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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10986
diff
changeset
|
1731 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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diff
changeset
|
1732 return true; |
|
59b052799158
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dcubed
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diff
changeset
|
1733 } |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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parents:
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diff
changeset
|
1734 // 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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|
1735 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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10986
diff
changeset
|
1736 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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10986
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changeset
|
1737 buf, buflen, offset, dlinfo.dli_fname)) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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diff
changeset
|
1738 return true; |
|
59b052799158
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dcubed
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10986
diff
changeset
|
1739 } |
|
2022
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diff
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|
1740 } |
|
11092
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diff
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|
1741 } |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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parents:
10986
diff
changeset
|
1742 |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1743 buf[0] = '\0'; |
|
2022
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7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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parents:
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diff
changeset
|
1744 if (offset != NULL) *offset = -1; |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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diff
changeset
|
1745 return false; |
| 0 | 1746 } |
| 1747 | |
| 1748 struct _address_to_library_name { | |
| 1749 address addr; // input : memory address | |
| 1750 size_t buflen; // size of fname | |
| 1751 char* fname; // output: library name | |
| 1752 address base; // library base addr | |
| 1753 }; | |
| 1754 | |
| 1755 static int address_to_library_name_callback(struct dl_phdr_info *info, | |
| 1756 size_t size, void *data) { | |
| 1757 int i; | |
| 1758 bool found = false; | |
| 1759 address libbase = NULL; | |
| 1760 struct _address_to_library_name * d = (struct _address_to_library_name *)data; | |
| 1761 | |
| 1762 // iterate through all loadable segments | |
| 1763 for (i = 0; i < info->dlpi_phnum; i++) { | |
| 1764 address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr); | |
| 1765 if (info->dlpi_phdr[i].p_type == PT_LOAD) { | |
| 1766 // base address of a library is the lowest address of its loaded | |
| 1767 // segments. | |
| 1768 if (libbase == NULL || libbase > segbase) { | |
| 1769 libbase = segbase; | |
| 1770 } | |
| 1771 // see if 'addr' is within current segment | |
| 1772 if (segbase <= d->addr && | |
| 1773 d->addr < segbase + info->dlpi_phdr[i].p_memsz) { | |
| 1774 found = true; | |
| 1775 } | |
| 1776 } | |
| 1777 } | |
| 1778 | |
| 1779 // dlpi_name is NULL or empty if the ELF file is executable, return 0 | |
| 1780 // so dll_address_to_library_name() can fall through to use dladdr() which | |
| 1781 // can figure out executable name from argv[0]. | |
| 1782 if (found && info->dlpi_name && info->dlpi_name[0]) { | |
| 1783 d->base = libbase; | |
| 1784 if (d->fname) { | |
| 1785 jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name); | |
| 1786 } | |
| 1787 return 1; | |
| 1788 } | |
| 1789 return 0; | |
| 1790 } | |
| 1791 | |
| 1792 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1793 int buflen, int* offset) { | |
|
11092
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|
1794 // buf is not optional, but offset is optional |
|
59b052799158
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diff
changeset
|
1795 assert(buf != NULL, "sanity check"); |
|
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diff
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|
1796 |
| 0 | 1797 Dl_info dlinfo; |
| 1798 struct _address_to_library_name data; | |
| 1799 | |
| 1800 // There is a bug in old glibc dladdr() implementation that it could resolve | |
| 1801 // to wrong library name if the .so file has a base address != NULL. Here | |
| 1802 // we iterate through the program headers of all loaded libraries to find | |
| 1803 // out which library 'addr' really belongs to. This workaround can be | |
| 1804 // removed once the minimum requirement for glibc is moved to 2.3.x. | |
| 1805 data.addr = addr; | |
| 1806 data.fname = buf; | |
| 1807 data.buflen = buflen; | |
| 1808 data.base = NULL; | |
| 1809 int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data); | |
| 1810 | |
| 1811 if (rslt) { | |
| 1812 // buf already contains library name | |
| 1813 if (offset) *offset = addr - data.base; | |
| 1814 return true; | |
|
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1815 } |
|
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1816 if (dladdr((void*)addr, &dlinfo) != 0) { |
|
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1817 if (dlinfo.dli_fname != NULL) { |
|
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1818 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
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1819 } |
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1820 if (dlinfo.dli_fbase != NULL && offset != NULL) { |
|
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1821 *offset = addr - (address)dlinfo.dli_fbase; |
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1822 } |
|
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1823 return true; |
|
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1824 } |
|
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1825 |
|
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|
1826 buf[0] = '\0'; |
|
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1827 if (offset) *offset = -1; |
|
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1828 return false; |
| 0 | 1829 } |
| 1830 | |
| 1831 // Loads .dll/.so and | |
| 1832 // in case of error it checks if .dll/.so was built for the | |
| 1833 // same architecture as Hotspot is running on | |
| 1834 | |
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1835 |
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1836 // Remember the stack's state. The Linux dynamic linker will change |
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1837 // the stack to 'executable' at most once, so we must safepoint only once. |
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1838 bool os::Linux::_stack_is_executable = false; |
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1839 |
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1840 // VM operation that loads a library. This is necessary if stack protection |
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1841 // of the Java stacks can be lost during loading the library. If we |
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1842 // do not stop the Java threads, they can stack overflow before the stacks |
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1843 // are protected again. |
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1844 class VM_LinuxDllLoad: public VM_Operation { |
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1845 private: |
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1846 const char *_filename; |
|
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1847 char *_ebuf; |
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1848 int _ebuflen; |
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1849 void *_lib; |
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1850 public: |
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1851 VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) : |
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1852 _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {} |
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1853 VMOp_Type type() const { return VMOp_LinuxDllLoad; } |
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1854 void doit() { |
|
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1855 _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen); |
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1856 os::Linux::_stack_is_executable = true; |
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1857 } |
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1858 void* loaded_library() { return _lib; } |
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1859 }; |
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1860 |
| 0 | 1861 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
| 1862 { | |
|
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1863 void * result = NULL; |
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1864 bool load_attempted = false; |
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1865 |
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1866 // Check whether the library to load might change execution rights |
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1867 // of the stack. If they are changed, the protection of the stack |
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1868 // guard pages will be lost. We need a safepoint to fix this. |
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1869 // |
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1870 // See Linux man page execstack(8) for more info. |
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1871 if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) { |
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1872 ElfFile ef(filename); |
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1873 if (!ef.specifies_noexecstack()) { |
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1874 if (!is_init_completed()) { |
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1875 os::Linux::_stack_is_executable = true; |
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1876 // This is OK - No Java threads have been created yet, and hence no |
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1877 // stack guard pages to fix. |
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1878 // |
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1879 // This should happen only when you are building JDK7 using a very |
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1880 // old version of JDK6 (e.g., with JPRT) and running test_gamma. |
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1881 // |
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1882 // Dynamic loader will make all stacks executable after |
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1883 // this function returns, and will not do that again. |
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1884 assert(Threads::first() == NULL, "no Java threads should exist yet."); |
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1885 } else { |
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1886 warning("You have loaded library %s which might have disabled stack guard. " |
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1887 "The VM will try to fix the stack guard now.\n" |
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1888 "It's highly recommended that you fix the library with " |
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1889 "'execstack -c <libfile>', or link it with '-z noexecstack'.", |
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1890 filename); |
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1891 |
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1892 assert(Thread::current()->is_Java_thread(), "must be Java thread"); |
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1893 JavaThread *jt = JavaThread::current(); |
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1894 if (jt->thread_state() != _thread_in_native) { |
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1895 // This happens when a compiler thread tries to load a hsdis-<arch>.so file |
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1896 // that requires ExecStack. Cannot enter safe point. Let's give up. |
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1897 warning("Unable to fix stack guard. Giving up."); |
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1898 } else { |
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1899 if (!LoadExecStackDllInVMThread) { |
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1900 // This is for the case where the DLL has an static |
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1901 // constructor function that executes JNI code. We cannot |
|
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1902 // load such DLLs in the VMThread. |
|
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1903 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1904 } |
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1905 |
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1906 ThreadInVMfromNative tiv(jt); |
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1907 debug_only(VMNativeEntryWrapper vew;) |
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1908 |
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1909 VM_LinuxDllLoad op(filename, ebuf, ebuflen); |
|
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1910 VMThread::execute(&op); |
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1911 if (LoadExecStackDllInVMThread) { |
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1912 result = op.loaded_library(); |
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1913 } |
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1914 load_attempted = true; |
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1915 } |
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1916 } |
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1917 } |
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1918 } |
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1919 |
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1920 if (!load_attempted) { |
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1921 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1922 } |
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1923 |
| 0 | 1924 if (result != NULL) { |
| 1925 // Successful loading | |
| 1926 return result; | |
| 1927 } | |
| 1928 | |
| 1929 Elf32_Ehdr elf_head; | |
| 1930 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
| 1931 char* diag_msg_buf=ebuf+strlen(ebuf); | |
| 1932 | |
| 1933 if (diag_msg_max_length==0) { | |
| 1934 // No more space in ebuf for additional diagnostics message | |
| 1935 return NULL; | |
| 1936 } | |
| 1937 | |
| 1938 | |
| 1939 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
| 1940 | |
| 1941 if (file_descriptor < 0) { | |
| 1942 // Can't open library, report dlerror() message | |
| 1943 return NULL; | |
| 1944 } | |
| 1945 | |
| 1946 bool failed_to_read_elf_head= | |
| 1947 (sizeof(elf_head)!= | |
| 1948 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
| 1949 | |
| 1950 ::close(file_descriptor); | |
| 1951 if (failed_to_read_elf_head) { | |
| 1952 // file i/o error - report dlerror() msg | |
| 1953 return NULL; | |
| 1954 } | |
| 1955 | |
| 1956 typedef struct { | |
| 1957 Elf32_Half code; // Actual value as defined in elf.h | |
| 1958 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
| 1959 char elf_class; // 32 or 64 bit | |
| 1960 char endianess; // MSB or LSB | |
| 1961 char* name; // String representation | |
| 1962 } arch_t; | |
| 1963 | |
| 1964 #ifndef EM_486 | |
| 1965 #define EM_486 6 /* Intel 80486 */ | |
| 1966 #endif | |
| 1967 | |
| 1968 static const arch_t arch_array[]={ | |
| 1969 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1970 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1971 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
| 1972 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
| 1973 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1974 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1975 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
| 1976 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
|
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1977 #if defined(VM_LITTLE_ENDIAN) |
|
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1978 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2LSB, (char*)"Power PC 64"}, |
|
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1979 #else |
| 1010 | 1980 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
|
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1981 #endif |
| 1010 | 1982 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, |
| 1983 {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, | |
| 1984 {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, | |
| 1985 {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, | |
| 1986 {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, | |
| 1987 {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, | |
| 1988 {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} | |
| 0 | 1989 }; |
| 1990 | |
| 1991 #if (defined IA32) | |
| 1992 static Elf32_Half running_arch_code=EM_386; | |
| 1993 #elif (defined AMD64) | |
| 1994 static Elf32_Half running_arch_code=EM_X86_64; | |
| 1995 #elif (defined IA64) | |
| 1996 static Elf32_Half running_arch_code=EM_IA_64; | |
| 1997 #elif (defined __sparc) && (defined _LP64) | |
| 1998 static Elf32_Half running_arch_code=EM_SPARCV9; | |
| 1999 #elif (defined __sparc) && (!defined _LP64) | |
| 2000 static Elf32_Half running_arch_code=EM_SPARC; | |
| 2001 #elif (defined __powerpc64__) | |
| 2002 static Elf32_Half running_arch_code=EM_PPC64; | |
| 2003 #elif (defined __powerpc__) | |
| 2004 static Elf32_Half running_arch_code=EM_PPC; | |
| 1010 | 2005 #elif (defined ARM) |
| 2006 static Elf32_Half running_arch_code=EM_ARM; | |
| 2007 #elif (defined S390) | |
| 2008 static Elf32_Half running_arch_code=EM_S390; | |
| 2009 #elif (defined ALPHA) | |
| 2010 static Elf32_Half running_arch_code=EM_ALPHA; | |
| 2011 #elif (defined MIPSEL) | |
| 2012 static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; | |
| 2013 #elif (defined PARISC) | |
| 2014 static Elf32_Half running_arch_code=EM_PARISC; | |
| 2015 #elif (defined MIPS) | |
| 2016 static Elf32_Half running_arch_code=EM_MIPS; | |
| 2017 #elif (defined M68K) | |
| 2018 static Elf32_Half running_arch_code=EM_68K; | |
| 0 | 2019 #else |
| 2020 #error Method os::dll_load requires that one of following is defined:\ | |
| 1010 | 2021 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
| 0 | 2022 #endif |
| 2023 | |
| 2024 // Identify compatability class for VM's architecture and library's architecture | |
| 2025 // Obtain string descriptions for architectures | |
| 2026 | |
| 2027 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
| 2028 int running_arch_index=-1; | |
| 2029 | |
| 2030 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
| 2031 if (running_arch_code == arch_array[i].code) { | |
| 2032 running_arch_index = i; | |
| 2033 } | |
| 2034 if (lib_arch.code == arch_array[i].code) { | |
| 2035 lib_arch.compat_class = arch_array[i].compat_class; | |
| 2036 lib_arch.name = arch_array[i].name; | |
| 2037 } | |
| 2038 } | |
| 2039 | |
| 2040 assert(running_arch_index != -1, | |
| 2041 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
| 2042 if (running_arch_index == -1) { | |
| 2043 // Even though running architecture detection failed | |
| 2044 // we may still continue with reporting dlerror() message | |
| 2045 return NULL; | |
| 2046 } | |
| 2047 | |
| 2048 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
| 2049 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
| 2050 return NULL; | |
| 2051 } | |
| 2052 | |
| 1010 | 2053 #ifndef S390 |
| 0 | 2054 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
| 2055 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
| 2056 return NULL; | |
| 2057 } | |
| 1010 | 2058 #endif // !S390 |
| 0 | 2059 |
| 2060 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
| 2061 if ( lib_arch.name!=NULL ) { | |
| 2062 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2063 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
| 2064 lib_arch.name, arch_array[running_arch_index].name); | |
| 2065 } else { | |
| 2066 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2067 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
| 2068 lib_arch.code, | |
| 2069 arch_array[running_arch_index].name); | |
| 2070 } | |
| 2071 } | |
| 2072 | |
| 2073 return NULL; | |
| 2074 } | |
| 2075 | |
|
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2076 void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) { |
|
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2077 void * result = ::dlopen(filename, RTLD_LAZY); |
|
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2078 if (result == NULL) { |
|
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|
2079 ::strncpy(ebuf, ::dlerror(), ebuflen - 1); |
|
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|
2080 ebuf[ebuflen-1] = '\0'; |
|
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|
2081 } |
|
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|
2082 return result; |
|
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|
2083 } |
|
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|
2084 |
|
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|
2085 void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) { |
|
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|
2086 void * result = NULL; |
|
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|
2087 if (LoadExecStackDllInVMThread) { |
|
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|
2088 result = dlopen_helper(filename, ebuf, ebuflen); |
|
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|
2089 } |
|
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|
2090 |
|
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|
2091 // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a |
|
9058789475af
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|
2092 // library that requires an executable stack, or which does not have this |
|
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|
2093 // stack attribute set, dlopen changes the stack attribute to executable. The |
|
9058789475af
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|
2094 // read protection of the guard pages gets lost. |
|
9058789475af
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|
2095 // |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
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|
2096 // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad |
|
9058789475af
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|
2097 // may have been queued at the same time. |
|
9058789475af
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|
2098 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
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|
2099 if (!_stack_is_executable) { |
|
9058789475af
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|
2100 JavaThread *jt = Threads::first(); |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
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|
2101 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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|
2102 while (jt) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
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8675
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changeset
|
2103 if (!jt->stack_guard_zone_unused() && // Stack not yet fully initialized |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
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8675
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changeset
|
2104 jt->stack_yellow_zone_enabled()) { // No pending stack overflow exceptions |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2105 if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(), |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2106 jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2107 warning("Attempt to reguard stack yellow zone failed."); |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2108 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2109 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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|
2110 jt = jt->next(); |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2111 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2112 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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|
2113 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
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|
2114 return result; |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
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8675
diff
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|
2115 } |
|
9058789475af
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|
2116 |
| 242 | 2117 /* |
| 2118 * glibc-2.0 libdl is not MT safe. If you are building with any glibc, | |
| 2119 * chances are you might want to run the generated bits against glibc-2.0 | |
| 2120 * libdl.so, so always use locking for any version of glibc. | |
| 2121 */ | |
| 2122 void* os::dll_lookup(void* handle, const char* name) { | |
| 2123 pthread_mutex_lock(&dl_mutex); | |
| 2124 void* res = dlsym(handle, name); | |
| 2125 pthread_mutex_unlock(&dl_mutex); | |
| 2126 return res; | |
| 2127 } | |
| 0 | 2128 |
|
17684
d1621038becf
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
sla
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12997
diff
changeset
|
2129 void* os::get_default_process_handle() { |
|
d1621038becf
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
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diff
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|
2130 return (void*)::dlopen(NULL, RTLD_LAZY); |
|
d1621038becf
8031968: Mac OS X: VM starts the agent by calling both Agent_OnAttach and Agent_OnAttach_L functions if its agent library is dynamically linked.
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diff
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|
2131 } |
| 0 | 2132 |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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diff
changeset
|
2133 static bool _print_ascii_file(const char* filename, outputStream* st) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2134 int fd = ::open(filename, O_RDONLY); |
| 0 | 2135 if (fd == -1) { |
| 2136 return false; | |
| 2137 } | |
| 2138 | |
| 2139 char buf[32]; | |
| 2140 int bytes; | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2141 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
| 0 | 2142 st->print_raw(buf, bytes); |
| 2143 } | |
| 2144 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2145 ::close(fd); |
| 0 | 2146 |
| 2147 return true; | |
| 2148 } | |
| 2149 | |
| 2150 void os::print_dll_info(outputStream *st) { | |
| 2151 st->print_cr("Dynamic libraries:"); | |
| 2152 | |
| 2153 char fname[32]; | |
| 2154 pid_t pid = os::Linux::gettid(); | |
| 2155 | |
| 2156 jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid); | |
| 2157 | |
| 2158 if (!_print_ascii_file(fname, st)) { | |
| 2159 st->print("Can not get library information for pid = %d\n", pid); | |
| 2160 } | |
| 2161 } | |
| 2162 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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diff
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|
2163 void os::print_os_info_brief(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2164 os::Linux::print_distro_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2165 |
|
7432b9db36ff
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5937
diff
changeset
|
2166 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2167 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2168 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2169 |
|
7432b9db36ff
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5937
diff
changeset
|
2170 } |
| 0 | 2171 |
| 2172 void os::print_os_info(outputStream* st) { | |
| 2173 st->print("OS:"); | |
| 2174 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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diff
changeset
|
2175 os::Linux::print_distro_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2176 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2177 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2178 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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parents:
5937
diff
changeset
|
2179 // Print warning if unsafe chroot environment detected |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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parents:
5937
diff
changeset
|
2180 if (unsafe_chroot_detected) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
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5937
diff
changeset
|
2181 st->print("WARNING!! "); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2182 st->print_cr(unstable_chroot_error); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2183 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
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5937
diff
changeset
|
2184 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
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5937
diff
changeset
|
2185 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
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5937
diff
changeset
|
2186 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2187 os::Posix::print_rlimit_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2188 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2189 os::Posix::print_load_average(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2190 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2191 os::Linux::print_full_memory_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2192 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
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5937
diff
changeset
|
2193 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
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5937
diff
changeset
|
2194 // Try to identify popular distros. |
|
12212
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2195 // Most Linux distributions have a /etc/XXX-release file, which contains |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2196 // the OS version string. Newer Linux distributions have a /etc/lsb-release |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2197 // file that also contains the OS version string. Some have more than one |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2198 // /etc/XXX-release file (e.g. Mandrake has both /etc/mandrake-release and |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2199 // /etc/redhat-release.), so the order is important. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2200 // Any Linux that is based on Redhat (i.e. Oracle, Mandrake, Sun JDS...) have |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2201 // their own specific XXX-release file as well as a redhat-release file. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2202 // Because of this the XXX-release file needs to be searched for before the |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2203 // redhat-release file. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2204 // Since Red Hat has a lsb-release file that is not very descriptive the |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2205 // search for redhat-release needs to be before lsb-release. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2206 // Since the lsb-release file is the new standard it needs to be searched |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2207 // before the older style release files. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2208 // Searching system-release (Red Hat) and os-release (other Linuxes) are a |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2209 // next to last resort. The os-release file is a new standard that contains |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2210 // distribution information and the system-release file seems to be an old |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2211 // standard that has been replaced by the lsb-release and os-release files. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2212 // Searching for the debian_version file is the last resort. It contains |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2213 // an informative string like "6.0.6" or "wheezy/sid". Because of this |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2214 // "Debian " is printed before the contents of the debian_version file. |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2215 void os::Linux::print_distro_info(outputStream* st) { |
|
12212
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2216 if (!_print_ascii_file("/etc/oracle-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2217 !_print_ascii_file("/etc/mandriva-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2218 !_print_ascii_file("/etc/mandrake-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2219 !_print_ascii_file("/etc/sun-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2220 !_print_ascii_file("/etc/redhat-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2221 !_print_ascii_file("/etc/lsb-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2222 !_print_ascii_file("/etc/SuSE-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2223 !_print_ascii_file("/etc/turbolinux-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2224 !_print_ascii_file("/etc/gentoo-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2225 !_print_ascii_file("/etc/ltib-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2226 !_print_ascii_file("/etc/angstrom-version", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2227 !_print_ascii_file("/etc/system-release", st) && |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2228 !_print_ascii_file("/etc/os-release", st)) { |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2229 |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2230 if (file_exists("/etc/debian_version")) { |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2231 st->print("Debian "); |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2232 _print_ascii_file("/etc/debian_version", st); |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2233 } else { |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2234 st->print("Linux"); |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2235 } |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2236 } |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2237 st->cr(); |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2238 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2239 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2240 void os::Linux::print_libversion_info(outputStream* st) { |
| 0 | 2241 // libc, pthread |
| 2242 st->print("libc:"); | |
| 2243 st->print(os::Linux::glibc_version()); st->print(" "); | |
| 2244 st->print(os::Linux::libpthread_version()); st->print(" "); | |
| 2245 if (os::Linux::is_LinuxThreads()) { | |
| 2246 st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed"); | |
| 2247 } | |
| 2248 st->cr(); | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2249 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2250 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2251 void os::Linux::print_full_memory_info(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2252 st->print("\n/proc/meminfo:\n"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2253 _print_ascii_file("/proc/meminfo", st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2254 st->cr(); |
|
3800
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2255 } |
|
bf6481e5f96d
7061225: os::print_cpu_info() should support os-specific data
jcoomes
parents:
3358
diff
changeset
|
2256 |
| 0 | 2257 void os::print_memory_info(outputStream* st) { |
| 2258 | |
| 2259 st->print("Memory:"); | |
| 2260 st->print(" %dk page", os::vm_page_size()>>10); | |
| 2261 | |
| 2262 // values in struct sysinfo are "unsigned long" | |
| 2263 struct sysinfo si; | |
| 2264 sysinfo(&si); | |
| 2265 | |
| 2266 st->print(", physical " UINT64_FORMAT "k", | |
| 2267 os::physical_memory() >> 10); | |
| 2268 st->print("(" UINT64_FORMAT "k free)", | |
| 2269 os::available_memory() >> 10); | |
| 2270 st->print(", swap " UINT64_FORMAT "k", | |
| 2271 ((jlong)si.totalswap * si.mem_unit) >> 10); | |
| 2272 st->print("(" UINT64_FORMAT "k free)", | |
| 2273 ((jlong)si.freeswap * si.mem_unit) >> 10); | |
| 2274 st->cr(); | |
| 2275 } | |
| 2276 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2277 void os::pd_print_cpu_info(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2278 st->print("\n/proc/cpuinfo:\n"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2279 if (!_print_ascii_file("/proc/cpuinfo", st)) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2280 st->print(" <Not Available>"); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2281 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2282 st->cr(); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2283 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2284 |
| 0 | 2285 void os::print_siginfo(outputStream* st, void* siginfo) { |
| 14410 | 2286 const siginfo_t* si = (const siginfo_t*)siginfo; |
| 2287 | |
| 2288 os::Posix::print_siginfo_brief(st, si); | |
| 2289 | |
| 2290 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && | |
| 0 | 2291 UseSharedSpaces) { |
| 2292 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 2293 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
| 2294 st->print("\n\nError accessing class data sharing archive." \ | |
| 2295 " Mapped file inaccessible during execution, " \ | |
| 2296 " possible disk/network problem."); | |
| 2297 } | |
| 2298 } | |
| 2299 st->cr(); | |
| 2300 } | |
| 2301 | |
| 2302 | |
| 2303 static void print_signal_handler(outputStream* st, int sig, | |
| 2304 char* buf, size_t buflen); | |
| 2305 | |
| 2306 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 2307 st->print_cr("Signal Handlers:"); | |
| 2308 print_signal_handler(st, SIGSEGV, buf, buflen); | |
| 2309 print_signal_handler(st, SIGBUS , buf, buflen); | |
| 2310 print_signal_handler(st, SIGFPE , buf, buflen); | |
| 2311 print_signal_handler(st, SIGPIPE, buf, buflen); | |
| 2312 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
| 2313 print_signal_handler(st, SIGILL , buf, buflen); | |
| 2314 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
| 2315 print_signal_handler(st, SR_signum, buf, buflen); | |
| 2316 print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); | |
| 2317 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
| 2318 print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); | |
| 2319 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
|
14432
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
2320 #if defined(PPC64) |
|
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
2321 print_signal_handler(st, SIGTRAP, buf, buflen); |
|
935bf3340572
8028470: PPC64 (part 214): linux: extend signal handler to catch SIGTRAP on ppc64.
goetz
parents:
14422
diff
changeset
|
2322 #endif |
| 0 | 2323 } |
| 2324 | |
| 2325 static char saved_jvm_path[MAXPATHLEN] = {0}; | |
| 2326 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2327 // Find the full path to the current module, libjvm.so |
| 1642 | 2328 void os::jvm_path(char *buf, jint buflen) { |
| 0 | 2329 // Error checking. |
| 1642 | 2330 if (buflen < MAXPATHLEN) { |
| 0 | 2331 assert(false, "must use a large-enough buffer"); |
| 2332 buf[0] = '\0'; | |
| 2333 return; | |
| 2334 } | |
| 2335 // Lazy resolve the path to current module. | |
| 2336 if (saved_jvm_path[0] != 0) { | |
| 2337 strcpy(buf, saved_jvm_path); | |
| 2338 return; | |
| 2339 } | |
| 2340 | |
| 2341 char dli_fname[MAXPATHLEN]; | |
| 2342 bool ret = dll_address_to_library_name( | |
| 2343 CAST_FROM_FN_PTR(address, os::jvm_path), | |
| 2344 dli_fname, sizeof(dli_fname), NULL); | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2345 assert(ret, "cannot locate libjvm"); |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2346 char *rp = NULL; |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2347 if (ret && dli_fname[0] != '\0') { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2348 rp = realpath(dli_fname, buf); |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
2349 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2350 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2351 return; |
| 0 | 2352 |
|
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
2204
diff
changeset
|
2353 if (Arguments::created_by_gamma_launcher()) { |
| 0 | 2354 // Support for the gamma launcher. Typical value for buf is |
| 2355 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
| 2356 // the right place in the string, then assume we are installed in a JDK and | |
| 2357 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
| 2358 // up the path so it looks like libjvm.so is installed there (append a | |
| 2359 // fake suffix hotspot/libjvm.so). | |
| 2360 const char *p = buf + strlen(buf) - 1; | |
| 2361 for (int count = 0; p > buf && count < 5; ++count) { | |
| 2362 for (--p; p > buf && *p != '/'; --p) | |
| 2363 /* empty */ ; | |
| 2364 } | |
| 2365 | |
| 2366 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
| 2367 // Look for JAVA_HOME in the environment. | |
| 2368 char* java_home_var = ::getenv("JAVA_HOME"); | |
| 2369 if (java_home_var != NULL && java_home_var[0] != 0) { | |
| 1642 | 2370 char* jrelib_p; |
| 2371 int len; | |
| 2372 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2373 // Check the current module name "libjvm.so". |
| 0 | 2374 p = strrchr(buf, '/'); |
| 2375 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
| 2376 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2377 rp = realpath(java_home_var, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2378 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2379 return; |
| 1642 | 2380 |
| 2381 // determine if this is a legacy image or modules image | |
| 2382 // modules image doesn't have "jre" subdirectory | |
| 2383 len = strlen(buf); | |
| 2384 jrelib_p = buf + len; | |
| 2385 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); | |
| 2386 if (0 != access(buf, F_OK)) { | |
| 2387 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); | |
| 2388 } | |
| 2389 | |
| 0 | 2390 if (0 == access(buf, F_OK)) { |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2391 // Use current module name "libjvm.so" |
| 1642 | 2392 len = strlen(buf); |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
parents:
7206
diff
changeset
|
2393 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); |
| 0 | 2394 } else { |
| 2395 // Go back to path of .so | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2396 rp = realpath(dli_fname, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2397 if (rp == NULL) |
|
513
2328d1d3f8cf
6781583: Hotspot build fails on linux 64 bit platform with gcc 4.3.2
xlu
parents:
477
diff
changeset
|
2398 return; |
| 0 | 2399 } |
| 2400 } | |
| 2401 } | |
| 2402 } | |
| 2403 | |
| 2404 strcpy(saved_jvm_path, buf); | |
| 2405 } | |
| 2406 | |
| 2407 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 2408 // no prefix required, not even "_" | |
| 2409 } | |
| 2410 | |
| 2411 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 2412 // no suffix required | |
| 2413 } | |
| 2414 | |
| 2415 //////////////////////////////////////////////////////////////////////////////// | |
| 2416 // sun.misc.Signal support | |
| 2417 | |
| 2418 static volatile jint sigint_count = 0; | |
| 2419 | |
| 2420 static void | |
| 2421 UserHandler(int sig, void *siginfo, void *context) { | |
| 2422 // 4511530 - sem_post is serialized and handled by the manager thread. When | |
| 2423 // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We | |
| 2424 // don't want to flood the manager thread with sem_post requests. | |
| 2425 if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) | |
| 2426 return; | |
| 2427 | |
| 2428 // Ctrl-C is pressed during error reporting, likely because the error | |
| 2429 // handler fails to abort. Let VM die immediately. | |
| 2430 if (sig == SIGINT && is_error_reported()) { | |
| 2431 os::die(); | |
| 2432 } | |
| 2433 | |
| 2434 os::signal_notify(sig); | |
| 2435 } | |
| 2436 | |
| 2437 void* os::user_handler() { | |
| 2438 return CAST_FROM_FN_PTR(void*, UserHandler); | |
| 2439 } | |
| 2440 | |
| 10405 | 2441 class Semaphore : public StackObj { |
| 2442 public: | |
| 2443 Semaphore(); | |
| 2444 ~Semaphore(); | |
| 2445 void signal(); | |
| 2446 void wait(); | |
| 2447 bool trywait(); | |
| 2448 bool timedwait(unsigned int sec, int nsec); | |
| 2449 private: | |
| 2450 sem_t _semaphore; | |
| 2451 }; | |
| 2452 | |
| 2453 Semaphore::Semaphore() { | |
| 2454 sem_init(&_semaphore, 0, 0); | |
| 2455 } | |
| 2456 | |
| 2457 Semaphore::~Semaphore() { | |
| 2458 sem_destroy(&_semaphore); | |
| 2459 } | |
| 2460 | |
| 2461 void Semaphore::signal() { | |
| 2462 sem_post(&_semaphore); | |
| 2463 } | |
| 2464 | |
| 2465 void Semaphore::wait() { | |
| 2466 sem_wait(&_semaphore); | |
| 2467 } | |
| 2468 | |
| 2469 bool Semaphore::trywait() { | |
| 2470 return sem_trywait(&_semaphore) == 0; | |
| 2471 } | |
| 2472 | |
| 2473 bool Semaphore::timedwait(unsigned int sec, int nsec) { | |
| 17738 | 2474 |
| 10405 | 2475 struct timespec ts; |
| 17738 | 2476 // Semaphore's are always associated with CLOCK_REALTIME |
| 2477 os::Linux::clock_gettime(CLOCK_REALTIME, &ts); | |
| 2478 // see unpackTime for discussion on overflow checking | |
| 2479 if (sec >= MAX_SECS) { | |
| 2480 ts.tv_sec += MAX_SECS; | |
| 2481 ts.tv_nsec = 0; | |
| 2482 } else { | |
| 2483 ts.tv_sec += sec; | |
| 2484 ts.tv_nsec += nsec; | |
| 2485 if (ts.tv_nsec >= NANOSECS_PER_SEC) { | |
| 2486 ts.tv_nsec -= NANOSECS_PER_SEC; | |
| 2487 ++ts.tv_sec; // note: this must be <= max_secs | |
| 2488 } | |
| 2489 } | |
| 10405 | 2490 |
| 2491 while (1) { | |
| 2492 int result = sem_timedwait(&_semaphore, &ts); | |
| 2493 if (result == 0) { | |
| 2494 return true; | |
| 2495 } else if (errno == EINTR) { | |
| 2496 continue; | |
| 2497 } else if (errno == ETIMEDOUT) { | |
| 2498 return false; | |
| 2499 } else { | |
| 2500 return false; | |
| 2501 } | |
| 2502 } | |
| 2503 } | |
| 2504 | |
| 0 | 2505 extern "C" { |
| 2506 typedef void (*sa_handler_t)(int); | |
| 2507 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
| 2508 } | |
| 2509 | |
| 2510 void* os::signal(int signal_number, void* handler) { | |
| 2511 struct sigaction sigAct, oldSigAct; | |
| 2512 | |
| 2513 sigfillset(&(sigAct.sa_mask)); | |
| 2514 sigAct.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 2515 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
| 2516 | |
| 2517 if (sigaction(signal_number, &sigAct, &oldSigAct)) { | |
| 2518 // -1 means registration failed | |
| 2519 return (void *)-1; | |
| 2520 } | |
| 2521 | |
| 2522 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
| 2523 } | |
| 2524 | |
| 2525 void os::signal_raise(int signal_number) { | |
| 2526 ::raise(signal_number); | |
| 2527 } | |
| 2528 | |
| 2529 /* | |
| 2530 * The following code is moved from os.cpp for making this | |
| 2531 * code platform specific, which it is by its very nature. | |
| 2532 */ | |
| 2533 | |
| 2534 // Will be modified when max signal is changed to be dynamic | |
| 2535 int os::sigexitnum_pd() { | |
| 2536 return NSIG; | |
| 2537 } | |
| 2538 | |
| 2539 // a counter for each possible signal value | |
| 2540 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
| 2541 | |
| 2542 // Linux(POSIX) specific hand shaking semaphore. | |
| 2543 static sem_t sig_sem; | |
| 10405 | 2544 static Semaphore sr_semaphore; |
| 0 | 2545 |
| 2546 void os::signal_init_pd() { | |
| 2547 // Initialize signal structures | |
| 2548 ::memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
| 2549 | |
| 2550 // Initialize signal semaphore | |
| 2551 ::sem_init(&sig_sem, 0, 0); | |
| 2552 } | |
| 2553 | |
| 2554 void os::signal_notify(int sig) { | |
| 2555 Atomic::inc(&pending_signals[sig]); | |
| 2556 ::sem_post(&sig_sem); | |
| 2557 } | |
| 2558 | |
| 2559 static int check_pending_signals(bool wait) { | |
| 2560 Atomic::store(0, &sigint_count); | |
| 2561 for (;;) { | |
| 2562 for (int i = 0; i < NSIG + 1; i++) { | |
| 2563 jint n = pending_signals[i]; | |
| 2564 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 2565 return i; | |
| 2566 } | |
| 2567 } | |
| 2568 if (!wait) { | |
| 2569 return -1; | |
| 2570 } | |
| 2571 JavaThread *thread = JavaThread::current(); | |
| 2572 ThreadBlockInVM tbivm(thread); | |
| 2573 | |
| 2574 bool threadIsSuspended; | |
| 2575 do { | |
| 2576 thread->set_suspend_equivalent(); | |
| 2577 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 2578 ::sem_wait(&sig_sem); | |
| 2579 | |
| 2580 // were we externally suspended while we were waiting? | |
| 2581 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 2582 if (threadIsSuspended) { | |
| 2583 // | |
| 2584 // The semaphore has been incremented, but while we were waiting | |
| 2585 // another thread suspended us. We don't want to continue running | |
| 2586 // while suspended because that would surprise the thread that | |
| 2587 // suspended us. | |
| 2588 // | |
| 2589 ::sem_post(&sig_sem); | |
| 2590 | |
| 2591 thread->java_suspend_self(); | |
| 2592 } | |
| 2593 } while (threadIsSuspended); | |
| 2594 } | |
| 2595 } | |
| 2596 | |
| 2597 int os::signal_lookup() { | |
| 2598 return check_pending_signals(false); | |
| 2599 } | |
| 2600 | |
| 2601 int os::signal_wait() { | |
| 2602 return check_pending_signals(true); | |
| 2603 } | |
| 2604 | |
| 2605 //////////////////////////////////////////////////////////////////////////////// | |
| 2606 // Virtual Memory | |
| 2607 | |
| 2608 int os::vm_page_size() { | |
| 2609 // Seems redundant as all get out | |
| 2610 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2611 return os::Linux::page_size(); | |
| 2612 } | |
| 2613 | |
| 2614 // Solaris allocates memory by pages. | |
| 2615 int os::vm_allocation_granularity() { | |
| 2616 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2617 return os::Linux::page_size(); | |
| 2618 } | |
| 2619 | |
| 2620 // Rationale behind this function: | |
| 2621 // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable | |
| 2622 // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get | |
| 2623 // samples for JITted code. Here we create private executable mapping over the code cache | |
| 2624 // and then we can use standard (well, almost, as mapping can change) way to provide | |
| 2625 // info for the reporting script by storing timestamp and location of symbol | |
| 2626 void linux_wrap_code(char* base, size_t size) { | |
| 2627 static volatile jint cnt = 0; | |
| 2628 | |
| 2629 if (!UseOprofile) { | |
| 2630 return; | |
| 2631 } | |
| 2632 | |
|
1497
96d554193f72
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1353
diff
changeset
|
2633 char buf[PATH_MAX+1]; |
| 0 | 2634 int num = Atomic::add(1, &cnt); |
| 2635 | |
|
1353
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
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1325
diff
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|
2636 snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d", |
|
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
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changeset
|
2637 os::get_temp_directory(), os::current_process_id(), num); |
| 0 | 2638 unlink(buf); |
| 2639 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2640 int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
| 0 | 2641 |
| 2642 if (fd != -1) { | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
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|
2643 off_t rv = ::lseek(fd, size-2, SEEK_SET); |
| 0 | 2644 if (rv != (off_t)-1) { |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2645 if (::write(fd, "", 1) == 1) { |
| 0 | 2646 mmap(base, size, |
| 2647 PROT_READ|PROT_WRITE|PROT_EXEC, | |
| 2648 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); | |
| 2649 } | |
| 2650 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2651 ::close(fd); |
| 0 | 2652 unlink(buf); |
| 2653 } | |
| 2654 } | |
| 2655 | |
|
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|
2656 static bool recoverable_mmap_error(int err) { |
|
a837fa3d3f86
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|
2657 // See if the error is one we can let the caller handle. This |
|
a837fa3d3f86
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|
2658 // list of errno values comes from JBS-6843484. I can't find a |
|
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|
2659 // Linux man page that documents this specific set of errno |
|
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|
2660 // values so while this list currently matches Solaris, it may |
|
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diff
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|
2661 // change as we gain experience with this failure mode. |
|
a837fa3d3f86
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|
2662 switch (err) { |
|
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|
2663 case EBADF: |
|
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|
2664 case EINVAL: |
|
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|
2665 case ENOTSUP: |
|
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|
2666 // let the caller deal with these errors |
|
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|
2667 return true; |
|
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|
2668 |
|
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|
2669 default: |
|
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|
2670 // Any remaining errors on this OS can cause our reserved mapping |
|
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|
2671 // to be lost. That can cause confusion where different data |
|
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|
2672 // structures think they have the same memory mapped. The worst |
|
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|
2673 // scenario is if both the VM and a library think they have the |
|
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|
2674 // same memory mapped. |
|
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|
2675 return false; |
|
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|
2676 } |
|
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|
2677 } |
|
a837fa3d3f86
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|
2678 |
|
a837fa3d3f86
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|
2679 static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
|
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|
2680 int err) { |
|
a837fa3d3f86
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|
2681 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
|
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|
2682 ", %d) failed; error='%s' (errno=%d)", addr, size, exec, |
|
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|
2683 strerror(err), err); |
|
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|
2684 } |
|
a837fa3d3f86
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diff
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|
2685 |
|
a837fa3d3f86
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|
2686 static void warn_fail_commit_memory(char* addr, size_t size, |
|
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|
2687 size_t alignment_hint, bool exec, |
|
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|
2688 int err) { |
|
a837fa3d3f86
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|
2689 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
|
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|
2690 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, size, |
|
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|
2691 alignment_hint, exec, strerror(err), err); |
|
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|
2692 } |
|
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|
2693 |
| 0 | 2694 // NOTE: Linux kernel does not really reserve the pages for us. |
| 2695 // All it does is to check if there are enough free pages | |
| 2696 // left at the time of mmap(). This could be a potential | |
| 2697 // problem. | |
|
10969
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|
2698 int os::Linux::commit_memory_impl(char* addr, size_t size, bool exec) { |
| 656 | 2699 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
| 2700 uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, | |
| 0 | 2701 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
| 3885 | 2702 if (res != (uintptr_t) MAP_FAILED) { |
| 2703 if (UseNUMAInterleaving) { | |
| 2704 numa_make_global(addr, size); | |
| 2705 } | |
|
10969
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|
2706 return 0; |
|
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|
2707 } |
|
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10405
diff
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|
2708 |
|
a837fa3d3f86
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10405
diff
changeset
|
2709 int err = errno; // save errno from mmap() call above |
|
a837fa3d3f86
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10405
diff
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|
2710 |
|
a837fa3d3f86
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10405
diff
changeset
|
2711 if (!recoverable_mmap_error(err)) { |
|
a837fa3d3f86
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10405
diff
changeset
|
2712 warn_fail_commit_memory(addr, size, exec, err); |
|
a837fa3d3f86
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diff
changeset
|
2713 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, "committing reserved memory."); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2714 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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parents:
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diff
changeset
|
2715 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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parents:
10405
diff
changeset
|
2716 return err; |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2717 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2718 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2719 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
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|
2720 return os::Linux::commit_memory_impl(addr, size, exec) == 0; |
|
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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|
2721 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2722 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2723 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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parents:
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diff
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|
2724 const char* mesg) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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parents:
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diff
changeset
|
2725 assert(mesg != NULL, "mesg must be specified"); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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parents:
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diff
changeset
|
2726 int err = os::Linux::commit_memory_impl(addr, size, exec); |
|
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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|
2727 if (err != 0) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
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diff
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|
2728 // the caller wants all commit errors to exit with the specified mesg: |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2729 warn_fail_commit_memory(addr, size, exec, err); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2730 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
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|
2731 } |
| 0 | 2732 } |
| 2733 | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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2302
diff
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|
2734 // Define MAP_HUGETLB here so we can build HotSpot on old systems. |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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diff
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|
2735 #ifndef MAP_HUGETLB |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
2736 #define MAP_HUGETLB 0x40000 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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diff
changeset
|
2737 #endif |
|
139667d9836a
7034464: Support transparent large pages on Linux
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diff
changeset
|
2738 |
|
139667d9836a
7034464: Support transparent large pages on Linux
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diff
changeset
|
2739 // Define MADV_HUGEPAGE here so we can build HotSpot on old systems. |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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2302
diff
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|
2740 #ifndef MADV_HUGEPAGE |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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2302
diff
changeset
|
2741 #define MADV_HUGEPAGE 14 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
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2302
diff
changeset
|
2742 #endif |
|
139667d9836a
7034464: Support transparent large pages on Linux
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2302
diff
changeset
|
2743 |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2744 int os::Linux::commit_memory_impl(char* addr, size_t size, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2745 size_t alignment_hint, bool exec) { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
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|
2746 int err = os::Linux::commit_memory_impl(addr, size, exec); |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2747 if (err == 0) { |
|
3913
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
iveresov
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3887
diff
changeset
|
2748 realign_memory(addr, size, alignment_hint); |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2749 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2750 return err; |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2751 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2752 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2753 bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2754 bool exec) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2755 return os::Linux::commit_memory_impl(addr, size, alignment_hint, exec) == 0; |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2756 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2757 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2758 void os::pd_commit_memory_or_exit(char* addr, size_t size, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2759 size_t alignment_hint, bool exec, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2760 const char* mesg) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2761 assert(mesg != NULL, "mesg must be specified"); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2762 int err = os::Linux::commit_memory_impl(addr, size, alignment_hint, exec); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2763 if (err != 0) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2764 // the caller wants all commit errors to exit with the specified mesg: |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2765 warn_fail_commit_memory(addr, size, alignment_hint, exec, err); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2766 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2767 } |
| 0 | 2768 } |
| 2769 | |
| 6197 | 2770 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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|
2771 if (UseTransparentHugePages && alignment_hint > (size_t)vm_page_size()) { |
|
3286
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7034464: Support transparent large pages on Linux
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diff
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|
2772 // We don't check the return value: madvise(MADV_HUGEPAGE) may not |
|
139667d9836a
7034464: Support transparent large pages on Linux
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diff
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|
2773 // be supported or the memory may already be backed by huge pages. |
|
139667d9836a
7034464: Support transparent large pages on Linux
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|
2774 ::madvise(addr, bytes, MADV_HUGEPAGE); |
|
139667d9836a
7034464: Support transparent large pages on Linux
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diff
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|
2775 } |
|
139667d9836a
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diff
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|
2776 } |
| 141 | 2777 |
| 6197 | 2778 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
changeset
|
2779 // This method works by doing an mmap over an existing mmaping and effectively discarding |
|
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
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5909
diff
changeset
|
2780 // the existing pages. However it won't work for SHM-based large pages that cannot be |
|
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
iveresov
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5909
diff
changeset
|
2781 // 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
changeset
|
2782 // 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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5909
diff
changeset
|
2783 // allow that in any case. |
|
12110
4c84d351cca9
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changeset
|
2784 if (alignment_hint <= (size_t)os::vm_page_size() || can_commit_large_page_memory()) { |
|
10969
a837fa3d3f86
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changeset
|
2785 commit_memory(addr, bytes, alignment_hint, !ExecMem); |
|
5937
cf956638b844
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diff
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|
2786 } |
| 141 | 2787 } |
| 2788 | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
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356
diff
changeset
|
2789 void os::numa_make_global(char *addr, size_t bytes) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
changeset
|
2790 Linux::numa_interleave_memory(addr, bytes); |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
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diff
changeset
|
2791 } |
| 141 | 2792 |
|
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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11092
diff
changeset
|
2793 // Define for numa_set_bind_policy(int). Setting the argument to 0 will set the |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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diff
changeset
|
2794 // bind policy to MPOL_PREFERRED for the current thread. |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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11092
diff
changeset
|
2795 #define USE_MPOL_PREFERRED 0 |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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diff
changeset
|
2796 |
| 141 | 2797 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
|
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2798 // To make NUMA and large pages more robust when both enabled, we need to ease |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
parents:
11092
diff
changeset
|
2799 // the requirements on where the memory should be allocated. MPOL_BIND is the |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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11092
diff
changeset
|
2800 // default policy and it will force memory to be allocated on the specified |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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11092
diff
changeset
|
2801 // node. Changing this to MPOL_PREFERRED will prefer to allocate the memory on |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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diff
changeset
|
2802 // the specified node, but will not force it. Using this policy will prevent |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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11092
diff
changeset
|
2803 // getting SIGBUS when trying to allocate large pages on NUMA nodes with no |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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11092
diff
changeset
|
2804 // free large pages. |
|
88c255656030
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mgerdin
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diff
changeset
|
2805 Linux::numa_set_bind_policy(USE_MPOL_PREFERRED); |
| 141 | 2806 Linux::numa_tonode_memory(addr, bytes, lgrp_hint); |
| 2807 } | |
| 2808 | |
| 2809 bool os::numa_topology_changed() { return false; } | |
| 2810 | |
| 2811 size_t os::numa_get_groups_num() { | |
| 2812 int max_node = Linux::numa_max_node(); | |
| 2813 return max_node > 0 ? max_node + 1 : 1; | |
| 2814 } | |
| 2815 | |
| 2816 int os::numa_get_group_id() { | |
| 2817 int cpu_id = Linux::sched_getcpu(); | |
| 2818 if (cpu_id != -1) { | |
| 2819 int lgrp_id = Linux::get_node_by_cpu(cpu_id); | |
| 2820 if (lgrp_id != -1) { | |
| 2821 return lgrp_id; | |
| 2822 } | |
| 0 | 2823 } |
| 2824 return 0; | |
| 2825 } | |
| 2826 | |
| 141 | 2827 size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
| 2828 for (size_t i = 0; i < size; i++) { | |
| 2829 ids[i] = i; | |
| 2830 } | |
| 2831 return size; | |
| 2832 } | |
| 2833 | |
| 0 | 2834 bool os::get_page_info(char *start, page_info* info) { |
| 2835 return false; | |
| 2836 } | |
| 2837 | |
| 2838 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2839 return end; | |
| 2840 } | |
| 2841 | |
| 3826 | 2842 |
| 2843 int os::Linux::sched_getcpu_syscall(void) { | |
| 2844 unsigned int cpu; | |
| 2845 int retval = -1; | |
| 2846 | |
| 2847 #if defined(IA32) | |
|
3887
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7082645: Hotspot doesn't compile on old linuxes after 7060836
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|
2848 # ifndef SYS_getcpu |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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diff
changeset
|
2849 # define SYS_getcpu 318 |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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diff
changeset
|
2850 # endif |
| 3826 | 2851 retval = syscall(SYS_getcpu, &cpu, NULL, NULL); |
| 2852 #elif defined(AMD64) | |
|
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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3885
diff
changeset
|
2853 // Unfortunately we have to bring all these macros here from vsyscall.h |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
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3885
diff
changeset
|
2854 // to be able to compile on old linuxes. |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
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3885
diff
changeset
|
2855 # define __NR_vgetcpu 2 |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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3885
diff
changeset
|
2856 # define VSYSCALL_START (-10UL << 20) |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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diff
changeset
|
2857 # define VSYSCALL_SIZE 1024 |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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3885
diff
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|
2858 # define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) |
| 3826 | 2859 typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache); |
| 2860 vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu); | |
| 2861 retval = vgetcpu(&cpu, NULL, NULL); | |
| 2862 #endif | |
| 2863 | |
| 2864 return (retval == -1) ? retval : cpu; | |
| 2865 } | |
| 2866 | |
| 2191 | 2867 // Something to do with the numa-aware allocator needs these symbols |
| 2868 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { } | |
| 2869 extern "C" JNIEXPORT void numa_error(char *where) { } | |
| 2870 extern "C" JNIEXPORT int fork1() { return fork(); } | |
| 141 | 2871 |
|
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|
2872 |
|
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|
2873 // If we are running with libnuma version > 2, then we should |
|
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|
2874 // be trying to use symbols with versions 1.1 |
|
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|
2875 // If we are running with earlier version, which did not have symbol versions, |
|
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|
2876 // we should use the base version. |
|
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|
2877 void* os::Linux::libnuma_dlsym(void* handle, const char *name) { |
|
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2878 void *f = dlvsym(handle, name, "libnuma_1.1"); |
|
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2879 if (f == NULL) { |
|
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2880 f = dlsym(handle, name); |
|
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|
2881 } |
|
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|
2882 return f; |
|
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|
2883 } |
|
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|
2884 |
|
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|
2885 bool os::Linux::libnuma_init() { |
| 141 | 2886 // sched_getcpu() should be in libc. |
| 2887 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, | |
| 2888 dlsym(RTLD_DEFAULT, "sched_getcpu"))); | |
| 2889 | |
| 3826 | 2890 // If it's not, try a direct syscall. |
| 2891 if (sched_getcpu() == -1) | |
| 2892 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall)); | |
| 2893 | |
| 141 | 2894 if (sched_getcpu() != -1) { // Does it work? |
|
267
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|
2895 void *handle = dlopen("libnuma.so.1", RTLD_LAZY); |
| 141 | 2896 if (handle != NULL) { |
| 2897 set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t, | |
|
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|
2898 libnuma_dlsym(handle, "numa_node_to_cpus"))); |
| 141 | 2899 set_numa_max_node(CAST_TO_FN_PTR(numa_max_node_func_t, |
|
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|
2900 libnuma_dlsym(handle, "numa_max_node"))); |
| 141 | 2901 set_numa_available(CAST_TO_FN_PTR(numa_available_func_t, |
|
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|
2902 libnuma_dlsym(handle, "numa_available"))); |
| 141 | 2903 set_numa_tonode_memory(CAST_TO_FN_PTR(numa_tonode_memory_func_t, |
|
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|
2904 libnuma_dlsym(handle, "numa_tonode_memory"))); |
|
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|
2905 set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t, |
|
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|
2906 libnuma_dlsym(handle, "numa_interleave_memory"))); |
|
12176
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|
2907 set_numa_set_bind_policy(CAST_TO_FN_PTR(numa_set_bind_policy_func_t, |
|
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|
2908 libnuma_dlsym(handle, "numa_set_bind_policy"))); |
|
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|
2909 |
|
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|
2910 |
| 141 | 2911 if (numa_available() != -1) { |
|
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|
2912 set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes")); |
| 141 | 2913 // Create a cpu -> node mapping |
| 6197 | 2914 _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(0, true); |
| 141 | 2915 rebuild_cpu_to_node_map(); |
|
462
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|
2916 return true; |
| 141 | 2917 } |
| 2918 } | |
| 2919 } | |
|
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|
2920 return false; |
| 141 | 2921 } |
| 2922 | |
| 2923 // rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id. | |
| 2924 // The table is later used in get_node_by_cpu(). | |
| 2925 void os::Linux::rebuild_cpu_to_node_map() { | |
|
462
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|
2926 const size_t NCPUS = 32768; // Since the buffer size computation is very obscure |
|
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|
2927 // in libnuma (possible values are starting from 16, |
|
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|
2928 // and continuing up with every other power of 2, but less |
|
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|
2929 // than the maximum number of CPUs supported by kernel), and |
|
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|
2930 // is a subject to change (in libnuma version 2 the requirements |
|
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|
2931 // are more reasonable) we'll just hardcode the number they use |
|
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|
2932 // in the library. |
|
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|
2933 const size_t BitsPerCLong = sizeof(long) * CHAR_BIT; |
|
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|
2934 |
|
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|
2935 size_t cpu_num = os::active_processor_count(); |
|
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|
2936 size_t cpu_map_size = NCPUS / BitsPerCLong; |
|
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|
2937 size_t cpu_map_valid_size = |
|
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|
2938 MIN2((cpu_num + BitsPerCLong - 1) / BitsPerCLong, cpu_map_size); |
|
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|
2939 |
| 141 | 2940 cpu_to_node()->clear(); |
| 2941 cpu_to_node()->at_grow(cpu_num - 1); | |
|
462
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|
2942 size_t node_num = numa_get_groups_num(); |
|
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|
2943 |
| 6197 | 2944 unsigned long *cpu_map = NEW_C_HEAP_ARRAY(unsigned long, cpu_map_size, mtInternal); |
|
462
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|
2945 for (size_t i = 0; i < node_num; i++) { |
| 141 | 2946 if (numa_node_to_cpus(i, cpu_map, cpu_map_size * sizeof(unsigned long)) != -1) { |
|
462
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|
2947 for (size_t j = 0; j < cpu_map_valid_size; j++) { |
| 141 | 2948 if (cpu_map[j] != 0) { |
|
462
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|
2949 for (size_t k = 0; k < BitsPerCLong; k++) { |
| 141 | 2950 if (cpu_map[j] & (1UL << k)) { |
|
462
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|
2951 cpu_to_node()->at_put(j * BitsPerCLong + k, i); |
| 141 | 2952 } |
| 2953 } | |
| 2954 } | |
| 2955 } | |
| 2956 } | |
| 2957 } | |
| 6197 | 2958 FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal); |
| 141 | 2959 } |
| 2960 | |
| 2961 int os::Linux::get_node_by_cpu(int cpu_id) { | |
| 2962 if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) { | |
| 2963 return cpu_to_node()->at(cpu_id); | |
| 2964 } | |
| 2965 return -1; | |
| 2966 } | |
| 2967 | |
| 2968 GrowableArray<int>* os::Linux::_cpu_to_node; | |
| 2969 os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu; | |
| 2970 os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus; | |
| 2971 os::Linux::numa_max_node_func_t os::Linux::_numa_max_node; | |
| 2972 os::Linux::numa_available_func_t os::Linux::_numa_available; | |
| 2973 os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory; | |
|
462
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|
2974 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory; |
|
12176
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|
2975 os::Linux::numa_set_bind_policy_func_t os::Linux::_numa_set_bind_policy; |
|
462
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|
2976 unsigned long* os::Linux::_numa_all_nodes; |
| 141 | 2977 |
| 6197 | 2978 bool os::pd_uncommit_memory(char* addr, size_t size) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1642
diff
changeset
|
2979 uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1642
diff
changeset
|
2980 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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diff
changeset
|
2981 return res != (uintptr_t) MAP_FAILED; |
| 0 | 2982 } |
| 2983 | |
|
12144
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|
2984 static |
|
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|
2985 address get_stack_commited_bottom(address bottom, size_t size) { |
|
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|
2986 address nbot = bottom; |
|
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|
2987 address ntop = bottom + size; |
|
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|
2988 |
|
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|
2989 size_t page_sz = os::vm_page_size(); |
|
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|
2990 unsigned pages = size / page_sz; |
|
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|
2991 |
|
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|
2992 unsigned char vec[1]; |
|
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|
2993 unsigned imin = 1, imax = pages + 1, imid; |
| 17765 | 2994 int mincore_return_value = 0; |
| 2995 | |
| 2996 assert(imin <= imax, "Unexpected page size"); | |
|
12144
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|
2997 |
|
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|
2998 while (imin < imax) { |
|
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|
2999 imid = (imax + imin) / 2; |
|
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|
3000 nbot = ntop - (imid * page_sz); |
|
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|
3001 |
|
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|
3002 // Use a trick with mincore to check whether the page is mapped or not. |
|
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|
3003 // mincore sets vec to 1 if page resides in memory and to 0 if page |
|
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|
3004 // is swapped output but if page we are asking for is unmapped |
|
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|
3005 // it returns -1,ENOMEM |
|
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|
3006 mincore_return_value = mincore(nbot, page_sz, vec); |
|
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|
3007 |
|
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|
3008 if (mincore_return_value == -1) { |
|
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|
3009 // Page is not mapped go up |
|
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|
3010 // to find first mapped page |
|
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|
3011 if (errno != EAGAIN) { |
|
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|
3012 assert(errno == ENOMEM, "Unexpected mincore errno"); |
|
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|
3013 imax = imid; |
|
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|
3014 } |
|
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|
3015 } else { |
|
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|
3016 // Page is mapped go down |
|
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|
3017 // to find first not mapped page |
|
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|
3018 imin = imid + 1; |
|
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|
3019 } |
|
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|
3020 } |
|
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|
3021 |
|
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|
3022 nbot = nbot + page_sz; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3023 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3024 // Adjust stack bottom one page up if last checked page is not mapped |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3025 if (mincore_return_value == -1) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3026 nbot = nbot + page_sz; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3027 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3028 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3029 return nbot; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3030 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3031 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3032 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3033 // Linux uses a growable mapping for the stack, and if the mapping for |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3034 // the stack guard pages is not removed when we detach a thread the |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3035 // stack cannot grow beyond the pages where the stack guard was |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3036 // mapped. If at some point later in the process the stack expands to |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3037 // that point, the Linux kernel cannot expand the stack any further |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3038 // 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
|
3039 // |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3040 // 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
|
3041 // a region (leaving a hole) that's already part of the stack mapping, |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3042 // so if the stack mapping has already grown beyond the guard pages at |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3043 // the time we create them, we have to truncate the stack mapping. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3044 // So, we need to know the extent of the stack mapping when |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3045 // create_stack_guard_pages() is called. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3046 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3047 // We only need this for stacks that are growable: at the time of |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3048 // writing thread stacks don't use growable mappings (i.e. those |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3049 // creeated with MAP_GROWSDOWN), and aren't marked "[stack]", so this |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3050 // only applies to the main thread. |
|
2469
677234770800
7017193: Small memory leak in get_stack_bounds os::create_stack_guard_pages
dsamersoff
parents:
2302
diff
changeset
|
3051 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3052 // If the (growable) stack mapping already extends beyond the point |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3053 // where we're going to put our guard pages, truncate the mapping at |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3054 // that point by munmap()ping it. This ensures that when we later |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3055 // munmap() the guard pages we don't leave a hole in the stack |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3056 // mapping. This only affects the main/initial thread |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3057 |
| 6197 | 3058 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3059 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3060 if (os::Linux::is_initial_thread()) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3061 // As we manually grow stack up to bottom inside create_attached_thread(), |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3062 // it's likely that os::Linux::initial_thread_stack_bottom is mapped and |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3063 // we don't need to do anything special. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3064 // Check it first, before calling heavy function. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3065 uintptr_t stack_extent = (uintptr_t) os::Linux::initial_thread_stack_bottom(); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3066 unsigned char vec[1]; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3067 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3068 if (mincore((address)stack_extent, os::vm_page_size(), vec) == -1) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3069 // Fallback to slow path on all errors, including EAGAIN |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3070 stack_extent = (uintptr_t) get_stack_commited_bottom( |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3071 os::Linux::initial_thread_stack_bottom(), |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3072 (size_t)addr - stack_extent); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3073 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3074 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3075 if (stack_extent < (uintptr_t)addr) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3076 ::munmap((void*)stack_extent, (uintptr_t)(addr - stack_extent)); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3077 } |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3078 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3079 |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3080 return os::commit_memory(addr, size, !ExecMem); |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3081 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3082 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3083 // If this is a growable mapping, remove the guard pages entirely by |
|
1750
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
3084 // munmap()ping them. If not, just call uncommit_memory(). This only |
|
c7004d700b49
6978641: Fix for 6929067 introduces additional overhead in thread creation/termination paths
dholmes
parents:
1681
diff
changeset
|
3085 // affects the main/initial thread, but guard against future OS changes |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3086 // It's safe to always unmap guard pages for initial thread because we |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3087 // always place it right after end of the mapped region |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3088 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3089 bool os::remove_stack_guard_pages(char* addr, size_t size) { |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3090 uintptr_t stack_extent, stack_base; |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3091 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3092 if (os::Linux::is_initial_thread()) { |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3093 return ::munmap(addr, size) == 0; |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3094 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3095 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3096 return os::uncommit_memory(addr, size); |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3097 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3098 |
| 0 | 3099 static address _highest_vm_reserved_address = NULL; |
| 3100 | |
| 3101 // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory | |
| 3102 // at 'requested_addr'. If there are existing memory mappings at the same | |
| 3103 // location, however, they will be overwritten. If 'fixed' is false, | |
| 3104 // 'requested_addr' is only treated as a hint, the return value may or | |
| 3105 // may not start from the requested address. Unlike Linux mmap(), this | |
| 3106 // function returns NULL to indicate failure. | |
| 3107 static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { | |
| 3108 char * addr; | |
| 3109 int flags; | |
| 3110 | |
| 3111 flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; | |
| 3112 if (fixed) { | |
| 3113 assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address"); | |
| 3114 flags |= MAP_FIXED; | |
| 3115 } | |
| 3116 | |
| 10157 | 3117 // Map reserved/uncommitted pages PROT_NONE so we fail early if we |
| 3118 // touch an uncommitted page. Otherwise, the read/write might | |
| 3119 // succeed if we have enough swap space to back the physical page. | |
| 3120 addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, | |
| 0 | 3121 flags, -1, 0); |
| 3122 | |
| 3123 if (addr != MAP_FAILED) { | |
| 3124 // anon_mmap() should only get called during VM initialization, | |
| 3125 // don't need lock (actually we can skip locking even it can be called | |
| 3126 // from multiple threads, because _highest_vm_reserved_address is just a | |
| 3127 // hint about the upper limit of non-stack memory regions.) | |
| 3128 if ((address)addr + bytes > _highest_vm_reserved_address) { | |
| 3129 _highest_vm_reserved_address = (address)addr + bytes; | |
| 3130 } | |
| 3131 } | |
| 3132 | |
| 3133 return addr == MAP_FAILED ? NULL : addr; | |
| 3134 } | |
| 3135 | |
| 3136 // Don't update _highest_vm_reserved_address, because there might be memory | |
| 3137 // regions above addr + size. If so, releasing a memory region only creates | |
| 3138 // a hole in the address space, it doesn't help prevent heap-stack collision. | |
| 3139 // | |
| 3140 static int anon_munmap(char * addr, size_t size) { | |
| 3141 return ::munmap(addr, size) == 0; | |
| 3142 } | |
| 3143 | |
| 6197 | 3144 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
| 0 | 3145 size_t alignment_hint) { |
| 3146 return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); | |
| 3147 } | |
| 3148 | |
| 6197 | 3149 bool os::pd_release_memory(char* addr, size_t size) { |
| 0 | 3150 return anon_munmap(addr, size); |
| 3151 } | |
| 3152 | |
| 3153 static address highest_vm_reserved_address() { | |
| 3154 return _highest_vm_reserved_address; | |
| 3155 } | |
| 3156 | |
| 3157 static bool linux_mprotect(char* addr, size_t size, int prot) { | |
| 3158 // Linux wants the mprotect address argument to be page aligned. | |
| 3159 char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size()); | |
| 3160 | |
| 3161 // According to SUSv3, mprotect() should only be used with mappings | |
| 3162 // established by mmap(), and mmap() always maps whole pages. Unaligned | |
| 3163 // 'addr' likely indicates problem in the VM (e.g. trying to change | |
| 3164 // protection of malloc'ed or statically allocated memory). Check the | |
| 3165 // caller if you hit this assert. | |
| 3166 assert(addr == bottom, "sanity check"); | |
| 3167 | |
| 3168 size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size()); | |
| 3169 return ::mprotect(bottom, size, prot) == 0; | |
| 3170 } | |
| 3171 | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3172 // Set protections specified |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3173 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
|
3174 bool is_committed) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3175 unsigned int p = 0; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3176 switch (prot) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3177 case MEM_PROT_NONE: p = PROT_NONE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3178 case MEM_PROT_READ: p = PROT_READ; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3179 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3180 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
|
3181 default: |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3182 ShouldNotReachHere(); |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3183 } |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3184 // is_committed is unused. |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3185 return linux_mprotect(addr, bytes, p); |
| 0 | 3186 } |
| 3187 | |
| 3188 bool os::guard_memory(char* addr, size_t size) { | |
| 3189 return linux_mprotect(addr, size, PROT_NONE); | |
| 3190 } | |
| 3191 | |
| 3192 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
|
3193 return linux_mprotect(addr, size, PROT_READ|PROT_WRITE); |
| 0 | 3194 } |
| 3195 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3196 bool os::Linux::transparent_huge_pages_sanity_check(bool warn, size_t page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3197 bool result = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3198 void *p = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3199 MAP_ANONYMOUS|MAP_PRIVATE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3200 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3201 if (p != MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3202 void *aligned_p = align_ptr_up(p, page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3203 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3204 result = madvise(aligned_p, page_size, MADV_HUGEPAGE) == 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3205 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3206 munmap(p, page_size * 2); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3207 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3208 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3209 if (warn && !result) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3210 warning("TransparentHugePages is not supported by the operating system."); |
|
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 return result; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3214 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3215 |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3216 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
|
3217 bool result = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3218 void *p = mmap(NULL, page_size, PROT_READ|PROT_WRITE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3219 MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3220 -1, 0); |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3221 |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3222 if (p != MAP_FAILED) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3223 // 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
|
3224 FILE *fp = fopen("/proc/self/maps", "r"); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3225 if (fp) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3226 while (!feof(fp)) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3227 char chars[257]; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3228 long x = 0; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3229 if (fgets(chars, sizeof(chars), fp)) { |
| 3358 | 3230 if (sscanf(chars, "%lx-%*x", &x) == 1 |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3231 && x == (long)p) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3232 if (strstr (chars, "hugepage")) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3233 result = true; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3234 break; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3235 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3236 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3237 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3238 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3239 fclose(fp); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3240 } |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3241 munmap(p, page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3242 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3243 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3244 if (warn && !result) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3245 warning("HugeTLBFS is not supported by the operating system."); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3246 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3247 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3248 return result; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3249 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3250 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3251 /* |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3252 * 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
|
3253 * |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3254 * From the coredump_filter documentation: |
|
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 * - (bit 0) anonymous private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3257 * - (bit 1) anonymous shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3258 * - (bit 2) file-backed private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3259 * - (bit 3) file-backed shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3260 * - (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
|
3261 * effective only if the bit 2 is cleared) |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3262 * - (bit 5) hugetlb private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3263 * - (bit 6) hugetlb shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3264 */ |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3265 static void set_coredump_filter(void) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3266 FILE *f; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3267 long cdm; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3268 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3269 if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3270 return; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3271 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3272 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3273 if (fscanf(f, "%lx", &cdm) != 1) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3274 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3275 return; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3276 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3277 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3278 rewind(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3279 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3280 if ((cdm & LARGEPAGES_BIT) == 0) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3281 cdm |= LARGEPAGES_BIT; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3282 fprintf(f, "%#lx", cdm); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3283 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3284 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3285 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3286 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3287 |
| 0 | 3288 // Large page support |
| 3289 | |
| 3290 static size_t _large_page_size = 0; | |
| 3291 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3292 size_t os::Linux::find_large_page_size() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3293 size_t large_page_size = 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3294 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3295 // 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
|
3296 // 2M or 4M page, depending on whether PAE (Physical Address Extensions) |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3297 // 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
|
3298 // page as large as 256M. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3299 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3300 // 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
|
3301 // for a line with the following format: |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3302 // Hugepagesize: 2048 kB |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3303 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3304 // 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
|
3305 // 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
|
3306 // the processor. |
| 0 | 3307 |
| 1010 | 3308 #ifndef ZERO |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3309 large_page_size = IA32_ONLY(4 * M) AMD64_ONLY(2 * M) IA64_ONLY(256 * M) SPARC_ONLY(4 * M) |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3310 ARM_ONLY(2 * M) PPC_ONLY(4 * M); |
| 1010 | 3311 #endif // ZERO |
| 0 | 3312 |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3313 FILE *fp = fopen("/proc/meminfo", "r"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3314 if (fp) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3315 while (!feof(fp)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3316 int x = 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3317 char buf[16]; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3318 if (fscanf(fp, "Hugepagesize: %d", &x) == 1) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3319 if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3320 large_page_size = x * K; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3321 break; |
|
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 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3324 // skip to next line |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3325 for (;;) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3326 int ch = fgetc(fp); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3327 if (ch == EOF || ch == (int)'\n') break; |
| 0 | 3328 } |
| 3329 } | |
| 3330 } | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3331 fclose(fp); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3332 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3333 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3334 if (!FLAG_IS_DEFAULT(LargePageSizeInBytes) && LargePageSizeInBytes != large_page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3335 warning("Setting LargePageSizeInBytes has no effect on this OS. Large page size is " |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3336 SIZE_FORMAT "%s.", byte_size_in_proper_unit(large_page_size), |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3337 proper_unit_for_byte_size(large_page_size)); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3338 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3339 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3340 return large_page_size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3341 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3342 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3343 size_t os::Linux::setup_large_page_size() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3344 _large_page_size = Linux::find_large_page_size(); |
| 0 | 3345 const size_t default_page_size = (size_t)Linux::page_size(); |
| 3346 if (_large_page_size > default_page_size) { | |
| 3347 _page_sizes[0] = _large_page_size; | |
| 3348 _page_sizes[1] = default_page_size; | |
| 3349 _page_sizes[2] = 0; | |
| 3350 } | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3351 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3352 return _large_page_size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3353 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3354 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3355 bool os::Linux::setup_large_page_type(size_t page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3356 if (FLAG_IS_DEFAULT(UseHugeTLBFS) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3357 FLAG_IS_DEFAULT(UseSHM) && |
|
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8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3358 FLAG_IS_DEFAULT(UseTransparentHugePages)) { |
|
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3359 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3360 // The type of large pages has not been specified by the user. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3361 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3362 // Try UseHugeTLBFS and then UseSHM. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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changeset
|
3363 UseHugeTLBFS = UseSHM = true; |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3364 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3365 // Don't try UseTransparentHugePages since there are known |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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changeset
|
3366 // performance issues with it turned on. This might change in the future. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3367 UseTransparentHugePages = false; |
|
12110
4c84d351cca9
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diff
changeset
|
3368 } |
|
4c84d351cca9
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stefank
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diff
changeset
|
3369 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3370 if (UseTransparentHugePages) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3371 bool warn_on_failure = !FLAG_IS_DEFAULT(UseTransparentHugePages); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3372 if (transparent_huge_pages_sanity_check(warn_on_failure, page_size)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3373 UseHugeTLBFS = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3374 UseSHM = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3375 return true; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3376 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3377 UseTransparentHugePages = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3378 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3379 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3380 if (UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3381 bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3382 if (hugetlbfs_sanity_check(warn_on_failure, page_size)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3383 UseSHM = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3384 return true; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3385 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3386 UseHugeTLBFS = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3387 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3388 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3389 return UseSHM; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3390 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3391 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3392 void os::large_page_init() { |
|
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3393 if (!UseLargePages && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3394 !UseTransparentHugePages && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3395 !UseHugeTLBFS && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3396 !UseSHM) { |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3397 // Not using large pages. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3398 return; |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3399 } |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3400 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3401 if (!FLAG_IS_DEFAULT(UseLargePages) && !UseLargePages) { |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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12252
diff
changeset
|
3402 // The user explicitly turned off large pages. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3403 // Ignore the rest of the large pages flags. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3404 UseTransparentHugePages = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3405 UseHugeTLBFS = false; |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3406 UseSHM = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3407 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3408 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3409 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3410 size_t large_page_size = Linux::setup_large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3411 UseLargePages = Linux::setup_large_page_type(large_page_size); |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3412 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3413 set_coredump_filter(); |
| 0 | 3414 } |
| 3415 | |
| 3416 #ifndef SHM_HUGETLB | |
| 3417 #define SHM_HUGETLB 04000 | |
| 3418 #endif | |
| 3419 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3420 char* os::Linux::reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
| 656 | 3421 // "exec" is passed in but not used. Creating the shared image for |
| 3422 // the code cache doesn't have an SHM_X executable permission to check. | |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3423 assert(UseLargePages && UseSHM, "only for SHM large pages"); |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3424 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
|
3425 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3426 if (!is_size_aligned(bytes, os::large_page_size()) || alignment > os::large_page_size()) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3427 return NULL; // Fallback to small pages. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3428 } |
| 0 | 3429 |
| 3430 key_t key = IPC_PRIVATE; | |
| 3431 char *addr; | |
| 3432 | |
| 3433 bool warn_on_failure = UseLargePages && | |
| 3434 (!FLAG_IS_DEFAULT(UseLargePages) || | |
|
12110
4c84d351cca9
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diff
changeset
|
3435 !FLAG_IS_DEFAULT(UseSHM) || |
| 0 | 3436 !FLAG_IS_DEFAULT(LargePageSizeInBytes) |
| 3437 ); | |
| 3438 char msg[128]; | |
| 3439 | |
| 3440 // Create a large shared memory region to attach to based on size. | |
| 3441 // Currently, size is the total size of the heap | |
| 3442 int shmid = shmget(key, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); | |
| 3443 if (shmid == -1) { | |
| 3444 // Possible reasons for shmget failure: | |
| 3445 // 1. shmmax is too small for Java heap. | |
| 3446 // > check shmmax value: cat /proc/sys/kernel/shmmax | |
| 3447 // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax | |
| 3448 // 2. not enough large page memory. | |
| 3449 // > check available large pages: cat /proc/meminfo | |
| 3450 // > increase amount of large pages: | |
| 3451 // echo new_value > /proc/sys/vm/nr_hugepages | |
| 3452 // Note 1: different Linux may use different name for this property, | |
| 3453 // e.g. on Redhat AS-3 it is "hugetlb_pool". | |
| 3454 // Note 2: it's possible there's enough physical memory available but | |
| 3455 // they are so fragmented after a long run that they can't | |
| 3456 // coalesce into large pages. Try to reserve large pages when | |
| 3457 // the system is still "fresh". | |
| 3458 if (warn_on_failure) { | |
| 3459 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
| 3460 warning(msg); | |
| 3461 } | |
| 3462 return NULL; | |
| 3463 } | |
| 3464 | |
| 3465 // attach to the region | |
|
1537
79bf863697eb
6951686: Using large pages on Linux prevents zero based compressed oops
kvn
parents:
1500
diff
changeset
|
3466 addr = (char*)shmat(shmid, req_addr, 0); |
| 0 | 3467 int err = errno; |
| 3468 | |
| 3469 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
| 3470 // will be deleted when it's detached by shmdt() or when the process | |
| 3471 // terminates. If shmat() is not successful this will remove the shared | |
| 3472 // segment immediately. | |
| 3473 shmctl(shmid, IPC_RMID, NULL); | |
| 3474 | |
| 3475 if ((intptr_t)addr == -1) { | |
| 3476 if (warn_on_failure) { | |
| 3477 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
| 3478 warning(msg); | |
| 3479 } | |
| 3480 return NULL; | |
| 3481 } | |
| 3482 | |
|
12110
4c84d351cca9
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parents:
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diff
changeset
|
3483 return addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3484 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3485 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3486 static void warn_on_large_pages_failure(char* req_addr, size_t bytes, int error) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3487 assert(error == ENOMEM, "Only expect to fail if no memory is available"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3488 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3489 bool warn_on_failure = UseLargePages && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3490 (!FLAG_IS_DEFAULT(UseLargePages) || |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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parents:
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diff
changeset
|
3491 !FLAG_IS_DEFAULT(UseHugeTLBFS) || |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3492 !FLAG_IS_DEFAULT(LargePageSizeInBytes)); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3493 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3494 if (warn_on_failure) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3495 char msg[128]; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3496 jio_snprintf(msg, sizeof(msg), "Failed to reserve large pages memory req_addr: " |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3497 PTR_FORMAT " bytes: " SIZE_FORMAT " (errno = %d).", req_addr, bytes, error); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3498 warning(msg); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3499 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3500 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3501 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3502 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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parents:
11092
diff
changeset
|
3503 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3504 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
|
3505 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3506 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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parents:
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diff
changeset
|
3507 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
|
3508 char* addr = (char*)::mmap(req_addr, bytes, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3509 MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3510 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3511 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3512 if (addr == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3513 warn_on_large_pages_failure(req_addr, bytes, errno); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3514 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3515 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3516 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3517 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
|
3518 |
| 0 | 3519 return addr; |
| 3520 } | |
| 3521 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3522 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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parents:
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diff
changeset
|
3523 size_t large_page_size = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3524 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3525 assert(bytes >= large_page_size, "Shouldn't allocate large pages for small sizes"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3526 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3527 // Allocate small pages. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3528 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3529 char* start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3530 if (req_addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3531 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3532 assert(is_size_aligned(bytes, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3533 start = os::reserve_memory(bytes, req_addr); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3534 assert(start == NULL || start == req_addr, "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3535 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3536 start = os::reserve_memory_aligned(bytes, alignment); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3537 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3538 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3539 if (start == NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3540 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3541 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3542 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3543 assert(is_ptr_aligned(start, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3544 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3545 // os::reserve_memory_special will record this memory area. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3546 // Need to release it here to prevent overlapping reservations. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3547 MemTracker::record_virtual_memory_release((address)start, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3548 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3549 char* end = start + bytes; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3550 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3551 // 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
|
3552 char* lp_start = (char*)align_ptr_up(start, large_page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3553 char* lp_end = (char*)align_ptr_down(end, large_page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3554 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3555 size_t lp_bytes = lp_end - lp_start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3556 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3557 assert(is_size_aligned(lp_bytes, large_page_size), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3558 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3559 if (lp_bytes == 0) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3560 // The mapped region doesn't even span the start and the end of a large page. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3561 // Fall back to allocate a non-special area. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3562 ::munmap(start, end - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3563 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3564 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3565 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3566 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3567 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3568 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3569 void* result; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3570 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3571 if (start != lp_start) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3572 result = ::mmap(start, lp_start - start, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3573 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3574 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3575 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3576 ::munmap(lp_start, end - lp_start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3577 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3578 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3579 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3580 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3581 result = ::mmap(lp_start, lp_bytes, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3582 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3583 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3584 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3585 warn_on_large_pages_failure(req_addr, bytes, errno); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3586 // If the mmap above fails, the large pages region will be unmapped and we |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3587 // have regions before and after with small pages. Release these regions. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3588 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3589 // | mapped | unmapped | mapped | |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3590 // ^ ^ ^ ^ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3591 // start lp_start lp_end end |
|
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 ::munmap(start, lp_start - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3594 ::munmap(lp_end, end - lp_end); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3595 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3596 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3597 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3598 if (lp_end != end) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3599 result = ::mmap(lp_end, end - lp_end, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3600 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3601 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3602 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3603 ::munmap(start, lp_end - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3604 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3605 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3606 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3607 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3608 return start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3609 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3610 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3611 char* os::Linux::reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3612 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3613 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3614 assert(is_power_of_2(alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3615 assert(is_power_of_2(os::large_page_size()), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3616 assert(bytes >= os::large_page_size(), "Shouldn't allocate large pages for small sizes"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3617 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3618 if (is_size_aligned(bytes, os::large_page_size()) && alignment <= os::large_page_size()) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3619 return reserve_memory_special_huge_tlbfs_only(bytes, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3620 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3621 return reserve_memory_special_huge_tlbfs_mixed(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3622 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3623 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3624 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3625 char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3626 assert(UseLargePages, "only for large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3627 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3628 char* addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3629 if (UseSHM) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3630 addr = os::Linux::reserve_memory_special_shm(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3631 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3632 assert(UseHugeTLBFS, "must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3633 addr = os::Linux::reserve_memory_special_huge_tlbfs(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3634 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3635 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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parents:
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diff
changeset
|
3636 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3637 if (UseNUMAInterleaving) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3638 numa_make_global(addr, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3639 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3640 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3641 // The memory is committed |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3642 MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, mtNone, CALLER_PC); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3643 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3644 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3645 return addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3646 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3647 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3648 bool os::Linux::release_memory_special_shm(char* base, size_t bytes) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3649 // detaching the SHM segment will also delete it, see reserve_memory_special_shm() |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3650 return shmdt(base) == 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3651 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3652 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3653 bool os::Linux::release_memory_special_huge_tlbfs(char* base, size_t bytes) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3654 return pd_release_memory(base, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3655 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3656 |
| 0 | 3657 bool os::release_memory_special(char* base, size_t bytes) { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3658 assert(UseLargePages, "only for large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3659 |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10969
diff
changeset
|
3660 MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); |
|
12110
4c84d351cca9
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stefank
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diff
changeset
|
3661 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3662 bool res; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3663 if (UseSHM) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3664 res = os::Linux::release_memory_special_shm(base, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3665 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3666 assert(UseHugeTLBFS, "must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3667 res = os::Linux::release_memory_special_huge_tlbfs(base, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3668 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3669 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3670 if (res) { |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10969
diff
changeset
|
3671 tkr.record((address)base, bytes); |
|
8711
6b803ba47588
8008257: NMT: assert(new_rec->is_allocation_record()) failed when running with shared memory option
zgu
parents:
8710
diff
changeset
|
3672 } else { |
|
10986
1f4355cee9a2
8013651: NMT: reserve/release sequence id's in incorrect order due to race
zgu
parents:
10969
diff
changeset
|
3673 tkr.discard(); |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3674 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3675 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3676 return res; |
| 0 | 3677 } |
| 3678 | |
| 3679 size_t os::large_page_size() { | |
| 3680 return _large_page_size; | |
| 3681 } | |
| 3682 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3683 // 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
|
3684 // memory. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3685 // HugeTLBFS allows application to commit large page memory on demand. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3686 // However, when committing memory with HugeTLBFS fails, the region |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3687 // that was supposed to be committed will lose the old reservation |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3688 // and allow other threads to steal that memory region. Because of this |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3689 // behavior we can't commit HugeTLBFS memory. |
| 0 | 3690 bool os::can_commit_large_page_memory() { |
|
12110
4c84d351cca9
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diff
changeset
|
3691 return UseTransparentHugePages; |
| 0 | 3692 } |
| 3693 | |
|
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3694 bool os::can_execute_large_page_memory() { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3695 return UseTransparentHugePages || UseHugeTLBFS; |
|
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3696 } |
|
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
jcoomes
parents:
62
diff
changeset
|
3697 |
| 0 | 3698 // Reserve memory at an arbitrary address, only if that area is |
| 3699 // available (and not reserved for something else). | |
| 3700 | |
| 6197 | 3701 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
| 0 | 3702 const int max_tries = 10; |
| 3703 char* base[max_tries]; | |
| 3704 size_t size[max_tries]; | |
| 3705 const size_t gap = 0x000000; | |
| 3706 | |
| 3707 // Assert only that the size is a multiple of the page size, since | |
| 3708 // that's all that mmap requires, and since that's all we really know | |
| 3709 // about at this low abstraction level. If we need higher alignment, | |
| 3710 // we can either pass an alignment to this method or verify alignment | |
| 3711 // in one of the methods further up the call chain. See bug 5044738. | |
| 3712 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
| 3713 | |
| 3714 // Repeatedly allocate blocks until the block is allocated at the | |
| 3715 // right spot. Give up after max_tries. Note that reserve_memory() will | |
| 3716 // automatically update _highest_vm_reserved_address if the call is | |
| 3717 // successful. The variable tracks the highest memory address every reserved | |
| 3718 // by JVM. It is used to detect heap-stack collision if running with | |
| 3719 // fixed-stack LinuxThreads. Because here we may attempt to reserve more | |
| 3720 // space than needed, it could confuse the collision detecting code. To | |
| 3721 // solve the problem, save current _highest_vm_reserved_address and | |
| 3722 // calculate the correct value before return. | |
| 3723 address old_highest = _highest_vm_reserved_address; | |
| 3724 | |
| 3725 // Linux mmap allows caller to pass an address as hint; give it a try first, | |
| 3726 // if kernel honors the hint then we can return immediately. | |
| 3727 char * addr = anon_mmap(requested_addr, bytes, false); | |
| 3728 if (addr == requested_addr) { | |
| 3729 return requested_addr; | |
| 3730 } | |
| 3731 | |
| 3732 if (addr != NULL) { | |
| 3733 // mmap() is successful but it fails to reserve at the requested address | |
| 3734 anon_munmap(addr, bytes); | |
| 3735 } | |
| 3736 | |
| 3737 int i; | |
| 3738 for (i = 0; i < max_tries; ++i) { | |
| 3739 base[i] = reserve_memory(bytes); | |
| 3740 | |
| 3741 if (base[i] != NULL) { | |
| 3742 // Is this the block we wanted? | |
| 3743 if (base[i] == requested_addr) { | |
| 3744 size[i] = bytes; | |
| 3745 break; | |
| 3746 } | |
| 3747 | |
| 3748 // Does this overlap the block we wanted? Give back the overlapped | |
| 3749 // parts and try again. | |
| 3750 | |
| 3751 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
| 3752 if (top_overlap >= 0 && top_overlap < bytes) { | |
| 3753 unmap_memory(base[i], top_overlap); | |
| 3754 base[i] += top_overlap; | |
| 3755 size[i] = bytes - top_overlap; | |
| 3756 } else { | |
| 3757 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
| 3758 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
| 3759 unmap_memory(requested_addr, bottom_overlap); | |
| 3760 size[i] = bytes - bottom_overlap; | |
| 3761 } else { | |
| 3762 size[i] = bytes; | |
| 3763 } | |
| 3764 } | |
| 3765 } | |
| 3766 } | |
| 3767 | |
| 3768 // Give back the unused reserved pieces. | |
| 3769 | |
| 3770 for (int j = 0; j < i; ++j) { | |
| 3771 if (base[j] != NULL) { | |
| 3772 unmap_memory(base[j], size[j]); | |
| 3773 } | |
| 3774 } | |
| 3775 | |
| 3776 if (i < max_tries) { | |
| 3777 _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); | |
| 3778 return requested_addr; | |
| 3779 } else { | |
| 3780 _highest_vm_reserved_address = old_highest; | |
| 3781 return NULL; | |
| 3782 } | |
| 3783 } | |
| 3784 | |
| 3785 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 3786 return ::read(fd, buf, nBytes); | |
| 3787 } | |
| 3788 | |
| 3789 // TODO-FIXME: reconcile Solaris' os::sleep with the linux variation. | |
| 3790 // Solaris uses poll(), linux uses park(). | |
| 3791 // Poll() is likely a better choice, assuming that Thread.interrupt() | |
| 3792 // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with | |
| 3793 // SIGSEGV, see 4355769. | |
| 3794 | |
| 3795 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
| 3796 assert(thread == Thread::current(), "thread consistency check"); | |
| 3797 | |
| 3798 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3799 slp->reset() ; | |
| 3800 OrderAccess::fence() ; | |
| 3801 | |
| 3802 if (interruptible) { | |
| 3803 jlong prevtime = javaTimeNanos(); | |
| 3804 | |
| 3805 for (;;) { | |
| 3806 if (os::is_interrupted(thread, true)) { | |
| 3807 return OS_INTRPT; | |
| 3808 } | |
| 3809 | |
| 3810 jlong newtime = javaTimeNanos(); | |
| 3811 | |
| 3812 if (newtime - prevtime < 0) { | |
| 3813 // time moving backwards, should only happen if no monotonic clock | |
| 3814 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3815 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3816 } else { | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3817 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3818 } |
| 3819 | |
| 3820 if(millis <= 0) { | |
| 3821 return OS_OK; | |
| 3822 } | |
| 3823 | |
| 3824 prevtime = newtime; | |
| 3825 | |
| 3826 { | |
| 3827 assert(thread->is_Java_thread(), "sanity check"); | |
| 3828 JavaThread *jt = (JavaThread *) thread; | |
| 3829 ThreadBlockInVM tbivm(jt); | |
| 3830 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
| 3831 | |
| 3832 jt->set_suspend_equivalent(); | |
| 3833 // cleared by handle_special_suspend_equivalent_condition() or | |
| 3834 // java_suspend_self() via check_and_wait_while_suspended() | |
| 3835 | |
| 3836 slp->park(millis); | |
| 3837 | |
| 3838 // were we externally suspended while we were waiting? | |
| 3839 jt->check_and_wait_while_suspended(); | |
| 3840 } | |
| 3841 } | |
| 3842 } else { | |
| 3843 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3844 jlong prevtime = javaTimeNanos(); | |
| 3845 | |
| 3846 for (;;) { | |
| 3847 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on | |
| 3848 // the 1st iteration ... | |
| 3849 jlong newtime = javaTimeNanos(); | |
| 3850 | |
| 3851 if (newtime - prevtime < 0) { | |
| 3852 // time moving backwards, should only happen if no monotonic clock | |
| 3853 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3854 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3855 } else { | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
3856 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3857 } |
| 3858 | |
| 3859 if(millis <= 0) break ; | |
| 3860 | |
| 3861 prevtime = newtime; | |
| 3862 slp->park(millis); | |
| 3863 } | |
| 3864 return OS_OK ; | |
| 3865 } | |
| 3866 } | |
| 3867 | |
|
17706
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3868 // |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3869 // Short sleep, direct OS call. |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3870 // |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3871 // Note: certain versions of Linux CFS scheduler (since 2.6.23) do not guarantee |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3872 // sched_yield(2) will actually give up the CPU: |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3873 // |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3874 // * Alone on this pariticular CPU, keeps running. |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3875 // * Before the introduction of "skip_buddy" with "compat_yield" disabled |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3876 // (pre 2.6.39). |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3877 // |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3878 // So calling this with 0 is an alternative. |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3879 // |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3880 void os::naked_short_sleep(jlong ms) { |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3881 struct timespec req; |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3882 |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
17684
diff
changeset
|
3883 assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
|
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
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|
3884 req.tv_sec = 0; |
|
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|
3885 if (ms > 0) { |
|
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3886 req.tv_nsec = (ms % 1000) * 1000000; |
|
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|
3887 } |
|
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|
3888 else { |
|
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|
3889 req.tv_nsec = 1; |
|
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|
3890 } |
|
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|
3891 |
|
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|
3892 nanosleep(&req, NULL); |
|
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3893 |
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|
3894 return; |
| 0 | 3895 } |
| 3896 | |
| 3897 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 3898 void os::infinite_sleep() { | |
| 3899 while (true) { // sleep forever ... | |
| 3900 ::sleep(100); // ... 100 seconds at a time | |
| 3901 } | |
| 3902 } | |
| 3903 | |
| 3904 // Used to convert frequent JVM_Yield() to nops | |
| 3905 bool os::dont_yield() { | |
| 3906 return DontYieldALot; | |
| 3907 } | |
| 3908 | |
| 3909 void os::yield() { | |
| 3910 sched_yield(); | |
| 3911 } | |
| 3912 | |
| 3913 os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} | |
| 3914 | |
| 3915 void os::yield_all(int attempts) { | |
| 3916 // Yields to all threads, including threads with lower priorities | |
| 3917 // Threads on Linux are all with same priority. The Solaris style | |
| 3918 // os::yield_all() with nanosleep(1ms) is not necessary. | |
| 3919 sched_yield(); | |
| 3920 } | |
| 3921 | |
| 3922 // Called from the tight loops to possibly influence time-sharing heuristics | |
| 3923 void os::loop_breaker(int attempts) { | |
| 3924 os::yield_all(attempts); | |
| 3925 } | |
| 3926 | |
| 3927 //////////////////////////////////////////////////////////////////////////////// | |
| 3928 // thread priority support | |
| 3929 | |
| 3930 // Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER | |
| 3931 // only supports dynamic priority, static priority must be zero. For real-time | |
| 3932 // applications, Linux supports SCHED_RR which allows static priority (1-99). | |
| 3933 // However, for large multi-threaded applications, SCHED_RR is not only slower | |
| 3934 // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out | |
| 3935 // of 5 runs - Sep 2005). | |
| 3936 // | |
| 3937 // The following code actually changes the niceness of kernel-thread/LWP. It | |
| 3938 // has an assumption that setpriority() only modifies one kernel-thread/LWP, | |
| 3939 // not the entire user process, and user level threads are 1:1 mapped to kernel | |
| 3940 // threads. It has always been the case, but could change in the future. For | |
| 3941 // this reason, the code should not be used as default (ThreadPriorityPolicy=0). | |
| 3942 // It is only used when ThreadPriorityPolicy=1 and requires root privilege. | |
| 3943 | |
|
4854
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3944 int os::java_to_os_priority[CriticalPriority + 1] = { |
| 0 | 3945 19, // 0 Entry should never be used |
| 3946 | |
| 3947 4, // 1 MinPriority | |
| 3948 3, // 2 | |
| 3949 2, // 3 | |
| 3950 | |
| 3951 1, // 4 | |
| 3952 0, // 5 NormPriority | |
| 3953 -1, // 6 | |
| 3954 | |
| 3955 -2, // 7 | |
| 3956 -3, // 8 | |
| 3957 -4, // 9 NearMaxPriority | |
| 3958 | |
|
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3959 -5, // 10 MaxPriority |
|
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3960 |
|
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3961 -5 // 11 CriticalPriority |
| 0 | 3962 }; |
| 3963 | |
| 3964 static int prio_init() { | |
| 3965 if (ThreadPriorityPolicy == 1) { | |
| 3966 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 | |
| 3967 // if effective uid is not root. Perhaps, a more elegant way of doing | |
| 3968 // this is to test CAP_SYS_NICE capability, but that will require libcap.so | |
| 3969 if (geteuid() != 0) { | |
| 3970 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { | |
| 3971 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); | |
| 3972 } | |
| 3973 ThreadPriorityPolicy = 0; | |
| 3974 } | |
| 3975 } | |
|
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|
3976 if (UseCriticalJavaThreadPriority) { |
|
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3977 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
|
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|
3978 } |
| 0 | 3979 return 0; |
| 3980 } | |
| 3981 | |
| 3982 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
| 3983 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; | |
| 3984 | |
| 3985 int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); | |
| 3986 return (ret == 0) ? OS_OK : OS_ERR; | |
| 3987 } | |
| 3988 | |
| 3989 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
| 3990 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { | |
| 3991 *priority_ptr = java_to_os_priority[NormPriority]; | |
| 3992 return OS_OK; | |
| 3993 } | |
| 3994 | |
| 3995 errno = 0; | |
| 3996 *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); | |
| 3997 return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); | |
| 3998 } | |
| 3999 | |
| 4000 // Hint to the underlying OS that a task switch would not be good. | |
| 4001 // Void return because it's a hint and can fail. | |
| 4002 void os::hint_no_preempt() {} | |
| 4003 | |
| 4004 //////////////////////////////////////////////////////////////////////////////// | |
| 4005 // suspend/resume support | |
| 4006 | |
| 4007 // the low-level signal-based suspend/resume support is a remnant from the | |
| 4008 // old VM-suspension that used to be for java-suspension, safepoints etc, | |
| 4009 // within hotspot. Now there is a single use-case for this: | |
| 4010 // - calling get_thread_pc() on the VMThread by the flat-profiler task | |
| 4011 // that runs in the watcher thread. | |
| 4012 // The remaining code is greatly simplified from the more general suspension | |
| 4013 // code that used to be used. | |
| 4014 // | |
| 4015 // The protocol is quite simple: | |
| 4016 // - suspend: | |
| 4017 // - sends a signal to the target thread | |
| 4018 // - polls the suspend state of the osthread using a yield loop | |
| 4019 // - target thread signal handler (SR_handler) sets suspend state | |
| 4020 // and blocks in sigsuspend until continued | |
| 4021 // - resume: | |
| 4022 // - sets target osthread state to continue | |
| 4023 // - sends signal to end the sigsuspend loop in the SR_handler | |
| 4024 // | |
| 4025 // Note that the SR_lock plays no role in this suspend/resume protocol. | |
| 4026 // | |
| 4027 | |
| 4028 static void resume_clear_context(OSThread *osthread) { | |
| 4029 osthread->set_ucontext(NULL); | |
| 4030 osthread->set_siginfo(NULL); | |
| 4031 } | |
| 4032 | |
| 4033 static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { | |
| 4034 osthread->set_ucontext(context); | |
| 4035 osthread->set_siginfo(siginfo); | |
| 4036 } | |
| 4037 | |
| 4038 // | |
| 4039 // Handler function invoked when a thread's execution is suspended or | |
| 4040 // resumed. We have to be careful that only async-safe functions are | |
| 4041 // called here (Note: most pthread functions are not async safe and | |
| 4042 // should be avoided.) | |
| 4043 // | |
| 4044 // Note: sigwait() is a more natural fit than sigsuspend() from an | |
| 4045 // interface point of view, but sigwait() prevents the signal hander | |
| 4046 // from being run. libpthread would get very confused by not having | |
| 4047 // its signal handlers run and prevents sigwait()'s use with the | |
| 4048 // mutex granting granting signal. | |
| 4049 // | |
| 10405 | 4050 // Currently only ever called on the VMThread and JavaThreads (PC sampling) |
| 0 | 4051 // |
| 4052 static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { | |
| 4053 // Save and restore errno to avoid confusing native code with EINTR | |
| 4054 // after sigsuspend. | |
| 4055 int old_errno = errno; | |
| 4056 | |
| 4057 Thread* thread = Thread::current(); | |
| 4058 OSThread* osthread = thread->osthread(); | |
| 10405 | 4059 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
| 4060 | |
| 4061 os::SuspendResume::State current = osthread->sr.state(); | |
| 4062 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { | |
| 0 | 4063 suspend_save_context(osthread, siginfo, context); |
| 4064 | |
| 10405 | 4065 // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
| 4066 os::SuspendResume::State state = osthread->sr.suspended(); | |
| 4067 if (state == os::SuspendResume::SR_SUSPENDED) { | |
| 4068 sigset_t suspend_set; // signals for sigsuspend() | |
| 4069 | |
| 4070 // get current set of blocked signals and unblock resume signal | |
| 4071 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); | |
| 4072 sigdelset(&suspend_set, SR_signum); | |
| 4073 | |
| 4074 sr_semaphore.signal(); | |
| 4075 // wait here until we are resumed | |
| 4076 while (1) { | |
| 4077 sigsuspend(&suspend_set); | |
| 4078 | |
| 4079 os::SuspendResume::State result = osthread->sr.running(); | |
| 4080 if (result == os::SuspendResume::SR_RUNNING) { | |
| 4081 sr_semaphore.signal(); | |
| 4082 break; | |
| 4083 } | |
| 4084 } | |
| 4085 | |
| 4086 } else if (state == os::SuspendResume::SR_RUNNING) { | |
| 4087 // request was cancelled, continue | |
| 4088 } else { | |
| 4089 ShouldNotReachHere(); | |
| 4090 } | |
| 0 | 4091 |
| 4092 resume_clear_context(osthread); | |
| 10405 | 4093 } else if (current == os::SuspendResume::SR_RUNNING) { |
| 4094 // request was cancelled, continue | |
| 4095 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { | |
| 4096 // ignore | |
| 0 | 4097 } else { |
| 10405 | 4098 // ignore |
| 0 | 4099 } |
| 4100 | |
| 4101 errno = old_errno; | |
| 4102 } | |
| 4103 | |
| 4104 | |
| 4105 static int SR_initialize() { | |
| 4106 struct sigaction act; | |
| 4107 char *s; | |
| 4108 /* Get signal number to use for suspend/resume */ | |
| 4109 if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { | |
| 4110 int sig = ::strtol(s, 0, 10); | |
| 4111 if (sig > 0 || sig < _NSIG) { | |
| 4112 SR_signum = sig; | |
| 4113 } | |
| 4114 } | |
| 4115 | |
| 4116 assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, | |
| 4117 "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); | |
| 4118 | |
| 4119 sigemptyset(&SR_sigset); | |
| 4120 sigaddset(&SR_sigset, SR_signum); | |
| 4121 | |
| 4122 /* Set up signal handler for suspend/resume */ | |
| 4123 act.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 4124 act.sa_handler = (void (*)(int)) SR_handler; | |
| 4125 | |
| 4126 // SR_signum is blocked by default. | |
| 4127 // 4528190 - We also need to block pthread restart signal (32 on all | |
| 4128 // supported Linux platforms). Note that LinuxThreads need to block | |
| 4129 // this signal for all threads to work properly. So we don't have | |
| 4130 // to use hard-coded signal number when setting up the mask. | |
| 4131 pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); | |
| 4132 | |
| 4133 if (sigaction(SR_signum, &act, 0) == -1) { | |
| 4134 return -1; | |
| 4135 } | |
| 4136 | |
| 4137 // Save signal flag | |
| 4138 os::Linux::set_our_sigflags(SR_signum, act.sa_flags); | |
| 4139 return 0; | |
| 4140 } | |
| 4141 | |
| 10405 | 4142 static int sr_notify(OSThread* osthread) { |
| 4143 int status = pthread_kill(osthread->pthread_id(), SR_signum); | |
| 4144 assert_status(status == 0, status, "pthread_kill"); | |
| 4145 return status; | |
| 4146 } | |
| 4147 | |
| 4148 // "Randomly" selected value for how long we want to spin | |
| 4149 // before bailing out on suspending a thread, also how often | |
| 4150 // we send a signal to a thread we want to resume | |
| 4151 static const int RANDOMLY_LARGE_INTEGER = 1000000; | |
| 4152 static const int RANDOMLY_LARGE_INTEGER2 = 100; | |
| 0 | 4153 |
| 4154 // returns true on success and false on error - really an error is fatal | |
| 4155 // but this seems the normal response to library errors | |
| 4156 static bool do_suspend(OSThread* osthread) { | |
| 10405 | 4157 assert(osthread->sr.is_running(), "thread should be running"); |
| 4158 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); | |
| 4159 | |
| 0 | 4160 // mark as suspended and send signal |
| 10405 | 4161 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
| 4162 // failed to switch, state wasn't running? | |
| 4163 ShouldNotReachHere(); | |
| 4164 return false; | |
| 4165 } | |
| 4166 | |
| 4167 if (sr_notify(osthread) != 0) { | |
| 4168 ShouldNotReachHere(); | |
| 4169 } | |
| 4170 | |
| 4171 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED | |
| 4172 while (true) { | |
| 4173 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
| 4174 break; | |
| 4175 } else { | |
| 4176 // timeout | |
| 4177 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); | |
| 4178 if (cancelled == os::SuspendResume::SR_RUNNING) { | |
| 4179 return false; | |
| 4180 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { | |
| 4181 // make sure that we consume the signal on the semaphore as well | |
| 4182 sr_semaphore.wait(); | |
| 4183 break; | |
| 4184 } else { | |
| 4185 ShouldNotReachHere(); | |
| 4186 return false; | |
| 4187 } | |
| 0 | 4188 } |
| 10405 | 4189 } |
| 4190 | |
| 4191 guarantee(osthread->sr.is_suspended(), "Must be suspended"); | |
| 4192 return true; | |
| 0 | 4193 } |
| 4194 | |
| 4195 static void do_resume(OSThread* osthread) { | |
| 4196 assert(osthread->sr.is_suspended(), "thread should be suspended"); | |
| 10405 | 4197 assert(!sr_semaphore.trywait(), "invalid semaphore state"); |
| 4198 | |
| 4199 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { | |
| 4200 // failed to switch to WAKEUP_REQUEST | |
| 4201 ShouldNotReachHere(); | |
| 4202 return; | |
| 4203 } | |
| 4204 | |
| 4205 while (true) { | |
| 4206 if (sr_notify(osthread) == 0) { | |
| 4207 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
| 4208 if (osthread->sr.is_running()) { | |
| 4209 return; | |
| 4210 } | |
| 4211 } | |
| 4212 } else { | |
| 4213 ShouldNotReachHere(); | |
| 0 | 4214 } |
| 4215 } | |
| 10405 | 4216 |
| 4217 guarantee(osthread->sr.is_running(), "Must be running!"); | |
| 0 | 4218 } |
| 4219 | |
| 4220 //////////////////////////////////////////////////////////////////////////////// | |
| 4221 // interrupt support | |
| 4222 | |
| 4223 void os::interrupt(Thread* thread) { | |
| 4224 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 4225 "possibility of dangling Thread pointer"); | |
| 4226 | |
| 4227 OSThread* osthread = thread->osthread(); | |
| 4228 | |
| 4229 if (!osthread->interrupted()) { | |
| 4230 osthread->set_interrupted(true); | |
| 4231 // More than one thread can get here with the same value of osthread, | |
| 4232 // resulting in multiple notifications. We do, however, want the store | |
| 4233 // to interrupted() to be visible to other threads before we execute unpark(). | |
| 4234 OrderAccess::fence(); | |
| 4235 ParkEvent * const slp = thread->_SleepEvent ; | |
| 4236 if (slp != NULL) slp->unpark() ; | |
| 4237 } | |
| 4238 | |
| 4239 // For JSR166. Unpark even if interrupt status already was set | |
| 4240 if (thread->is_Java_thread()) | |
| 4241 ((JavaThread*)thread)->parker()->unpark(); | |
| 4242 | |
| 4243 ParkEvent * ev = thread->_ParkEvent ; | |
| 4244 if (ev != NULL) ev->unpark() ; | |
| 4245 | |
| 4246 } | |
| 4247 | |
| 4248 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 4249 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 4250 "possibility of dangling Thread pointer"); | |
| 4251 | |
| 4252 OSThread* osthread = thread->osthread(); | |
| 4253 | |
| 4254 bool interrupted = osthread->interrupted(); | |
| 4255 | |
| 4256 if (interrupted && clear_interrupted) { | |
| 4257 osthread->set_interrupted(false); | |
| 4258 // consider thread->_SleepEvent->reset() ... optional optimization | |
| 4259 } | |
| 4260 | |
| 4261 return interrupted; | |
| 4262 } | |
| 4263 | |
| 4264 /////////////////////////////////////////////////////////////////////////////////// | |
| 4265 // signal handling (except suspend/resume) | |
| 4266 | |
| 4267 // This routine may be used by user applications as a "hook" to catch signals. | |
| 4268 // The user-defined signal handler must pass unrecognized signals to this | |
| 4269 // routine, and if it returns true (non-zero), then the signal handler must | |
| 4270 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
| 4271 // routine will never retun false (zero), but instead will execute a VM panic | |
| 4272 // routine kill the process. | |
| 4273 // | |
| 4274 // If this routine returns false, it is OK to call it again. This allows | |
| 4275 // the user-defined signal handler to perform checks either before or after | |
| 4276 // the VM performs its own checks. Naturally, the user code would be making | |
| 4277 // a serious error if it tried to handle an exception (such as a null check | |
| 4278 // or breakpoint) that the VM was generating for its own correct operation. | |
| 4279 // | |
| 4280 // This routine may recognize any of the following kinds of signals: | |
| 4281 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. | |
| 4282 // It should be consulted by handlers for any of those signals. | |
| 4283 // | |
| 4284 // The caller of this routine must pass in the three arguments supplied | |
| 4285 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
| 4286 // field of the structure passed to sigaction(). This routine assumes that | |
| 4287 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
| 4288 // | |
| 4289 // Note that the VM will print warnings if it detects conflicting signal | |
| 4290 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
| 4291 // | |
| 2191 | 4292 extern "C" JNIEXPORT int |
| 0 | 4293 JVM_handle_linux_signal(int signo, siginfo_t* siginfo, |
| 4294 void* ucontext, int abort_if_unrecognized); | |
| 4295 | |
| 4296 void signalHandler(int sig, siginfo_t* info, void* uc) { | |
| 4297 assert(info != NULL && uc != NULL, "it must be old kernel"); | |
| 8067 | 4298 int orig_errno = errno; // Preserve errno value over signal handler. |
| 0 | 4299 JVM_handle_linux_signal(sig, info, uc, true); |
| 8067 | 4300 errno = orig_errno; |
| 0 | 4301 } |
| 4302 | |
| 4303 | |
| 4304 // This boolean allows users to forward their own non-matching signals | |
| 4305 // to JVM_handle_linux_signal, harmlessly. | |
| 4306 bool os::Linux::signal_handlers_are_installed = false; | |
| 4307 | |
| 4308 // For signal-chaining | |
| 4309 struct sigaction os::Linux::sigact[MAXSIGNUM]; | |
| 4310 unsigned int os::Linux::sigs = 0; | |
| 4311 bool os::Linux::libjsig_is_loaded = false; | |
| 4312 typedef struct sigaction *(*get_signal_t)(int); | |
| 4313 get_signal_t os::Linux::get_signal_action = NULL; | |
| 4314 | |
| 4315 struct sigaction* os::Linux::get_chained_signal_action(int sig) { | |
| 4316 struct sigaction *actp = NULL; | |
| 4317 | |
| 4318 if (libjsig_is_loaded) { | |
| 4319 // Retrieve the old signal handler from libjsig | |
| 4320 actp = (*get_signal_action)(sig); | |
| 4321 } | |
| 4322 if (actp == NULL) { | |
| 4323 // Retrieve the preinstalled signal handler from jvm | |
| 4324 actp = get_preinstalled_handler(sig); | |
| 4325 } | |
| 4326 | |
| 4327 return actp; | |
| 4328 } | |
| 4329 | |
| 4330 static bool call_chained_handler(struct sigaction *actp, int sig, | |
| 4331 siginfo_t *siginfo, void *context) { | |
| 4332 // Call the old signal handler | |
| 4333 if (actp->sa_handler == SIG_DFL) { | |
| 4334 // It's more reasonable to let jvm treat it as an unexpected exception | |
| 4335 // instead of taking the default action. | |
| 4336 return false; | |
| 4337 } else if (actp->sa_handler != SIG_IGN) { | |
| 4338 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
| 4339 // automaticlly block the signal | |
| 4340 sigaddset(&(actp->sa_mask), sig); | |
| 4341 } | |
| 4342 | |
| 4343 sa_handler_t hand; | |
| 4344 sa_sigaction_t sa; | |
| 4345 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
| 4346 // retrieve the chained handler | |
| 4347 if (siginfo_flag_set) { | |
| 4348 sa = actp->sa_sigaction; | |
| 4349 } else { | |
| 4350 hand = actp->sa_handler; | |
| 4351 } | |
| 4352 | |
| 4353 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
| 4354 actp->sa_handler = SIG_DFL; | |
| 4355 } | |
| 4356 | |
| 4357 // try to honor the signal mask | |
| 4358 sigset_t oset; | |
| 4359 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
| 4360 | |
| 4361 // call into the chained handler | |
| 4362 if (siginfo_flag_set) { | |
| 4363 (*sa)(sig, siginfo, context); | |
| 4364 } else { | |
| 4365 (*hand)(sig); | |
| 4366 } | |
| 4367 | |
| 4368 // restore the signal mask | |
| 4369 pthread_sigmask(SIG_SETMASK, &oset, 0); | |
| 4370 } | |
| 4371 // Tell jvm's signal handler the signal is taken care of. | |
| 4372 return true; | |
| 4373 } | |
| 4374 | |
| 4375 bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
| 4376 bool chained = false; | |
| 4377 // signal-chaining | |
| 4378 if (UseSignalChaining) { | |
| 4379 struct sigaction *actp = get_chained_signal_action(sig); | |
| 4380 if (actp != NULL) { | |
| 4381 chained = call_chained_handler(actp, sig, siginfo, context); | |
| 4382 } | |
| 4383 } | |
| 4384 return chained; | |
| 4385 } | |
| 4386 | |
| 4387 struct sigaction* os::Linux::get_preinstalled_handler(int sig) { | |
| 4388 if ((( (unsigned int)1 << sig ) & sigs) != 0) { | |
| 4389 return &sigact[sig]; | |
| 4390 } | |
| 4391 return NULL; | |
| 4392 } | |
| 4393 | |
| 4394 void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
| 4395 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4396 sigact[sig] = oldAct; | |
| 4397 sigs |= (unsigned int)1 << sig; | |
| 4398 } | |
| 4399 | |
| 4400 // for diagnostic | |
| 4401 int os::Linux::sigflags[MAXSIGNUM]; | |
| 4402 | |
| 4403 int os::Linux::get_our_sigflags(int sig) { | |
| 4404 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4405 return sigflags[sig]; | |
| 4406 } | |
| 4407 | |
| 4408 void os::Linux::set_our_sigflags(int sig, int flags) { | |
| 4409 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4410 sigflags[sig] = flags; | |
| 4411 } | |
| 4412 | |
| 4413 void os::Linux::set_signal_handler(int sig, bool set_installed) { | |
| 4414 // Check for overwrite. | |
| 4415 struct sigaction oldAct; | |
| 4416 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
| 4417 | |
| 4418 void* oldhand = oldAct.sa_sigaction | |
| 4419 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4420 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4421 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
| 4422 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
| 4423 oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { | |
| 4424 if (AllowUserSignalHandlers || !set_installed) { | |
| 4425 // Do not overwrite; user takes responsibility to forward to us. | |
| 4426 return; | |
| 4427 } else if (UseSignalChaining) { | |
| 4428 // save the old handler in jvm | |
| 4429 save_preinstalled_handler(sig, oldAct); | |
| 4430 // libjsig also interposes the sigaction() call below and saves the | |
| 4431 // old sigaction on it own. | |
| 4432 } else { | |
|
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|
4433 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
|
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diff
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|
4434 "%#lx for signal %d.", (long)oldhand, sig)); |
| 0 | 4435 } |
| 4436 } | |
| 4437 | |
| 4438 struct sigaction sigAct; | |
| 4439 sigfillset(&(sigAct.sa_mask)); | |
| 4440 sigAct.sa_handler = SIG_DFL; | |
| 4441 if (!set_installed) { | |
| 4442 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 4443 } else { | |
| 4444 sigAct.sa_sigaction = signalHandler; | |
| 4445 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 4446 } | |
| 4447 // Save flags, which are set by ours | |
| 4448 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4449 sigflags[sig] = sigAct.sa_flags; | |
| 4450 | |
| 4451 int ret = sigaction(sig, &sigAct, &oldAct); | |
| 4452 assert(ret == 0, "check"); | |
| 4453 | |
| 4454 void* oldhand2 = oldAct.sa_sigaction | |
| 4455 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4456 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4457 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
| 4458 } | |
| 4459 | |
| 4460 // install signal handlers for signals that HotSpot needs to | |
| 4461 // handle in order to support Java-level exception handling. | |
| 4462 | |
| 4463 void os::Linux::install_signal_handlers() { | |
| 4464 if (!signal_handlers_are_installed) { | |
| 4465 signal_handlers_are_installed = true; | |
| 4466 | |
| 4467 // signal-chaining | |
| 4468 typedef void (*signal_setting_t)(); | |
| 4469 signal_setting_t begin_signal_setting = NULL; | |
| 4470 signal_setting_t end_signal_setting = NULL; | |
| 4471 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4472 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
| 4473 if (begin_signal_setting != NULL) { | |
| 4474 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4475 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
| 4476 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
| 4477 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
| 4478 libjsig_is_loaded = true; | |
| 4479 assert(UseSignalChaining, "should enable signal-chaining"); | |
| 4480 } | |
| 4481 if (libjsig_is_loaded) { | |
| 4482 // Tell libjsig jvm is setting signal handlers | |
| 4483 (*begin_signal_setting)(); | |
| 4484 } | |
| 4485 | |
| 4486 set_signal_handler(SIGSEGV, true); | |
| 4487 set_signal_handler(SIGPIPE, true); | |
| 4488 set_signal_handler(SIGBUS, true); | |
| 4489 set_signal_handler(SIGILL, true); | |
| 4490 set_signal_handler(SIGFPE, true); | |
|
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|
4491 #if defined(PPC64) |
|
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|
4492 set_signal_handler(SIGTRAP, true); |
|
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|
4493 #endif |
| 0 | 4494 set_signal_handler(SIGXFSZ, true); |
| 4495 | |
| 4496 if (libjsig_is_loaded) { | |
| 4497 // Tell libjsig jvm finishes setting signal handlers | |
| 4498 (*end_signal_setting)(); | |
| 4499 } | |
| 4500 | |
| 4501 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
|
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3913
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changeset
|
4502 // and if UserSignalHandler is installed all bets are off. |
|
3607aac85aa9
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3913
diff
changeset
|
4503 // Log that signal checking is off only if -verbose:jni is specified. |
| 0 | 4504 if (CheckJNICalls) { |
| 4505 if (libjsig_is_loaded) { | |
|
3956
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3913
diff
changeset
|
4506 if (PrintJNIResolving) { |
|
3607aac85aa9
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kevinw
parents:
3913
diff
changeset
|
4507 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
|
3607aac85aa9
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kevinw
parents:
3913
diff
changeset
|
4508 } |
| 0 | 4509 check_signals = false; |
| 4510 } | |
| 4511 if (AllowUserSignalHandlers) { | |
|
3956
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3913
diff
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|
4512 if (PrintJNIResolving) { |
|
3607aac85aa9
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kevinw
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3913
diff
changeset
|
4513 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
|
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diff
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|
4514 } |
| 0 | 4515 check_signals = false; |
| 4516 } | |
| 4517 } | |
| 4518 } | |
| 4519 } | |
| 4520 | |
| 4521 // This is the fastest way to get thread cpu time on Linux. | |
| 4522 // Returns cpu time (user+sys) for any thread, not only for current. | |
| 4523 // POSIX compliant clocks are implemented in the kernels 2.6.16+. | |
| 4524 // It might work on 2.6.10+ with a special kernel/glibc patch. | |
| 4525 // For reference, please, see IEEE Std 1003.1-2004: | |
| 4526 // http://www.unix.org/single_unix_specification | |
| 4527 | |
| 4528 jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) { | |
| 4529 struct timespec tp; | |
| 4530 int rc = os::Linux::clock_gettime(clockid, &tp); | |
| 4531 assert(rc == 0, "clock_gettime is expected to return 0 code"); | |
| 4532 | |
|
4712
e7dead7e90af
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4082
diff
changeset
|
4533 return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec; |
| 0 | 4534 } |
| 4535 | |
| 4536 ///// | |
| 4537 // glibc on Linux platform uses non-documented flag | |
| 4538 // to indicate, that some special sort of signal | |
| 4539 // trampoline is used. | |
| 4540 // We will never set this flag, and we should | |
| 4541 // ignore this flag in our diagnostic | |
| 4542 #ifdef SIGNIFICANT_SIGNAL_MASK | |
| 4543 #undef SIGNIFICANT_SIGNAL_MASK | |
| 4544 #endif | |
| 4545 #define SIGNIFICANT_SIGNAL_MASK (~0x04000000) | |
| 4546 | |
| 4547 static const char* get_signal_handler_name(address handler, | |
| 4548 char* buf, int buflen) { | |
| 4549 int offset; | |
| 4550 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
| 4551 if (found) { | |
| 4552 // skip directory names | |
| 4553 const char *p1, *p2; | |
| 4554 p1 = buf; | |
| 4555 size_t len = strlen(os::file_separator()); | |
| 4556 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 4557 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
| 4558 } else { | |
| 4559 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
| 4560 } | |
| 4561 return buf; | |
| 4562 } | |
| 4563 | |
| 4564 static void print_signal_handler(outputStream* st, int sig, | |
| 4565 char* buf, size_t buflen) { | |
| 4566 struct sigaction sa; | |
| 4567 | |
| 4568 sigaction(sig, NULL, &sa); | |
| 4569 | |
| 4570 // See comment for SIGNIFICANT_SIGNAL_MASK define | |
| 4571 sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4572 | |
| 4573 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
| 4574 | |
| 4575 address handler = (sa.sa_flags & SA_SIGINFO) | |
| 4576 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
| 4577 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
| 4578 | |
| 4579 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
| 4580 st->print("SIG_DFL"); | |
| 4581 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
| 4582 st->print("SIG_IGN"); | |
| 4583 } else { | |
| 4584 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
| 4585 } | |
| 4586 | |
| 14410 | 4587 st->print(", sa_mask[0]="); |
| 4588 os::Posix::print_signal_set_short(st, &sa.sa_mask); | |
| 0 | 4589 |
| 4590 address rh = VMError::get_resetted_sighandler(sig); | |
| 4591 // May be, handler was resetted by VMError? | |
| 4592 if(rh != NULL) { | |
| 4593 handler = rh; | |
| 4594 sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; | |
| 4595 } | |
| 4596 | |
| 14410 | 4597 st->print(", sa_flags="); |
| 4598 os::Posix::print_sa_flags(st, sa.sa_flags); | |
| 0 | 4599 |
| 4600 // Check: is it our handler? | |
| 4601 if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || | |
| 4602 handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { | |
| 4603 // It is our signal handler | |
| 4604 // check for flags, reset system-used one! | |
| 4605 if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
| 4606 st->print( | |
| 4607 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
| 4608 os::Linux::get_our_sigflags(sig)); | |
| 4609 } | |
| 4610 } | |
| 4611 st->cr(); | |
| 4612 } | |
| 4613 | |
| 4614 | |
| 4615 #define DO_SIGNAL_CHECK(sig) \ | |
| 4616 if (!sigismember(&check_signal_done, sig)) \ | |
| 4617 os::Linux::check_signal_handler(sig) | |
| 4618 | |
| 4619 // This method is a periodic task to check for misbehaving JNI applications | |
| 4620 // under CheckJNI, we can add any periodic checks here | |
| 4621 | |
| 4622 void os::run_periodic_checks() { | |
| 4623 | |
| 4624 if (check_signals == false) return; | |
| 4625 | |
| 4626 // SEGV and BUS if overridden could potentially prevent | |
| 4627 // generation of hs*.log in the event of a crash, debugging | |
| 4628 // such a case can be very challenging, so we absolutely | |
| 4629 // check the following for a good measure: | |
| 4630 DO_SIGNAL_CHECK(SIGSEGV); | |
| 4631 DO_SIGNAL_CHECK(SIGILL); | |
| 4632 DO_SIGNAL_CHECK(SIGFPE); | |
| 4633 DO_SIGNAL_CHECK(SIGBUS); | |
| 4634 DO_SIGNAL_CHECK(SIGPIPE); | |
| 4635 DO_SIGNAL_CHECK(SIGXFSZ); | |
|
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14422
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|
4636 #if defined(PPC64) |
|
935bf3340572
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14422
diff
changeset
|
4637 DO_SIGNAL_CHECK(SIGTRAP); |
|
935bf3340572
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14422
diff
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|
4638 #endif |
| 0 | 4639 |
| 4640 // ReduceSignalUsage allows the user to override these handlers | |
| 4641 // see comments at the very top and jvm_solaris.h | |
| 4642 if (!ReduceSignalUsage) { | |
| 4643 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
| 4644 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
| 4645 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
| 4646 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
| 4647 } | |
| 4648 | |
| 4649 DO_SIGNAL_CHECK(SR_signum); | |
| 4650 DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); | |
| 4651 } | |
| 4652 | |
| 4653 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
| 4654 | |
| 4655 static os_sigaction_t os_sigaction = NULL; | |
| 4656 | |
| 4657 void os::Linux::check_signal_handler(int sig) { | |
| 4658 char buf[O_BUFLEN]; | |
| 4659 address jvmHandler = NULL; | |
| 4660 | |
| 4661 | |
| 4662 struct sigaction act; | |
| 4663 if (os_sigaction == NULL) { | |
| 4664 // only trust the default sigaction, in case it has been interposed | |
| 4665 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
| 4666 if (os_sigaction == NULL) return; | |
| 4667 } | |
| 4668 | |
| 4669 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
| 4670 | |
| 4671 | |
| 4672 act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4673 | |
| 4674 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
| 4675 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
| 4676 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
| 4677 | |
| 4678 | |
| 4679 switch(sig) { | |
| 4680 case SIGSEGV: | |
| 4681 case SIGBUS: | |
| 4682 case SIGFPE: | |
| 4683 case SIGPIPE: | |
| 4684 case SIGILL: | |
| 4685 case SIGXFSZ: | |
| 4686 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); | |
| 4687 break; | |
| 4688 | |
| 4689 case SHUTDOWN1_SIGNAL: | |
| 4690 case SHUTDOWN2_SIGNAL: | |
| 4691 case SHUTDOWN3_SIGNAL: | |
| 4692 case BREAK_SIGNAL: | |
| 4693 jvmHandler = (address)user_handler(); | |
| 4694 break; | |
| 4695 | |
| 4696 case INTERRUPT_SIGNAL: | |
| 4697 jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); | |
| 4698 break; | |
| 4699 | |
| 4700 default: | |
| 4701 if (sig == SR_signum) { | |
| 4702 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); | |
| 4703 } else { | |
| 4704 return; | |
| 4705 } | |
| 4706 break; | |
| 4707 } | |
| 4708 | |
| 4709 if (thisHandler != jvmHandler) { | |
| 4710 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
| 4711 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
| 4712 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
| 4713 // No need to check this sig any longer | |
| 4714 sigaddset(&check_signal_done, sig); | |
| 4715 } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
| 4716 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
| 4717 tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig)); | |
| 4718 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
| 4719 // No need to check this sig any longer | |
| 4720 sigaddset(&check_signal_done, sig); | |
| 4721 } | |
| 4722 | |
| 4723 // Dump all the signal | |
| 4724 if (sigismember(&check_signal_done, sig)) { | |
| 4725 print_signal_handlers(tty, buf, O_BUFLEN); | |
| 4726 } | |
| 4727 } | |
| 4728 | |
| 4729 extern void report_error(char* file_name, int line_no, char* title, char* format, ...); | |
| 4730 | |
| 4731 extern bool signal_name(int signo, char* buf, size_t len); | |
| 4732 | |
| 4733 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
| 4734 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
| 4735 // signal | |
| 4736 if (!signal_name(exception_code, buf, size)) { | |
| 4737 jio_snprintf(buf, size, "SIG%d", exception_code); | |
| 4738 } | |
| 4739 return buf; | |
| 4740 } else { | |
| 4741 return NULL; | |
| 4742 } | |
| 4743 } | |
| 4744 | |
| 4745 // this is called _before_ the most of global arguments have been parsed | |
| 4746 void os::init(void) { | |
| 4747 char dummy; /* used to get a guess on initial stack address */ | |
| 4748 // first_hrtime = gethrtime(); | |
| 4749 | |
| 4750 // With LinuxThreads the JavaMain thread pid (primordial thread) | |
| 4751 // is different than the pid of the java launcher thread. | |
| 4752 // So, on Linux, the launcher thread pid is passed to the VM | |
| 4753 // via the sun.java.launcher.pid property. | |
| 4754 // Use this property instead of getpid() if it was correctly passed. | |
| 4755 // See bug 6351349. | |
| 4756 pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); | |
| 4757 | |
| 4758 _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); | |
| 4759 | |
| 4760 clock_tics_per_sec = sysconf(_SC_CLK_TCK); | |
| 4761 | |
| 4762 init_random(1234567); | |
| 4763 | |
| 4764 ThreadCritical::initialize(); | |
| 4765 | |
| 4766 Linux::set_page_size(sysconf(_SC_PAGESIZE)); | |
| 4767 if (Linux::page_size() == -1) { | |
|
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4768 fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)", |
|
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4769 strerror(errno))); |
| 0 | 4770 } |
| 4771 init_page_sizes((size_t) Linux::page_size()); | |
| 4772 | |
| 4773 Linux::initialize_system_info(); | |
| 4774 | |
| 4775 // main_thread points to the aboriginal thread | |
| 4776 Linux::_main_thread = pthread_self(); | |
| 4777 | |
| 4778 Linux::clock_init(); | |
|
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
4779 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
|
4780 |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4781 // 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
|
4782 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
|
4783 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
|
4784 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
|
4785 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
|
4786 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4787 // 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
|
4788 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
|
4789 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
|
4790 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
|
4791 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
|
4792 " - 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
|
4793 } 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
|
4794 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
|
4795 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4796 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4797 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4798 // 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
|
4799 |
| 242 | 4800 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
|
4801 |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4802 // 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
|
4803 // 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
|
4804 // 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
|
4805 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
|
4806 StackYellowPages = 1; |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4807 StackRedPages = 1; |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4808 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
|
4809 } |
| 0 | 4810 } |
| 4811 | |
| 4812 // To install functions for atexit system call | |
| 4813 extern "C" { | |
| 4814 static void perfMemory_exit_helper() { | |
| 4815 perfMemory_exit(); | |
| 4816 } | |
| 4817 } | |
| 4818 | |
| 4819 // this is called _after_ the global arguments have been parsed | |
| 4820 jint os::init_2(void) | |
| 4821 { | |
| 4822 Linux::fast_thread_clock_init(); | |
| 4823 | |
| 4824 // Allocate a single page and mark it as readable for safepoint polling | |
| 4825 address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
| 4826 guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); | |
| 4827 | |
| 4828 os::set_polling_page( polling_page ); | |
| 4829 | |
| 4830 #ifndef PRODUCT | |
| 4831 if(Verbose && PrintMiscellaneous) | |
| 4832 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 4833 #endif | |
| 4834 | |
| 4835 if (!UseMembar) { | |
| 4836 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
|
4837 guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); |
| 0 | 4838 os::set_memory_serialize_page( mem_serialize_page ); |
| 4839 | |
| 4840 #ifndef PRODUCT | |
| 4841 if(Verbose && PrintMiscellaneous) | |
| 4842 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 4843 #endif | |
| 4844 } | |
| 4845 | |
| 4846 // initialize suspend/resume support - must do this before signal_sets_init() | |
| 4847 if (SR_initialize() != 0) { | |
| 4848 perror("SR_initialize failed"); | |
| 4849 return JNI_ERR; | |
| 4850 } | |
| 4851 | |
| 4852 Linux::signal_sets_init(); | |
| 4853 Linux::install_signal_handlers(); | |
| 4854 | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4855 // 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
|
4856 // the java system classes, including StackOverflowError - depends on page |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4857 // 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
|
4858 // 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
|
4859 // class initialization depending on 32 or 64 bit VM. |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4860 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
|
4861 (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
|
4862 (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
|
4863 |
| 0 | 4864 size_t threadStackSizeInBytes = ThreadStackSize * K; |
| 4865 if (threadStackSizeInBytes != 0 && | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4866 threadStackSizeInBytes < os::Linux::min_stack_allowed) { |
| 0 | 4867 tty->print_cr("\nThe stack size specified is too small, " |
| 4868 "Specify at least %dk", | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4869 os::Linux::min_stack_allowed/ K); |
| 0 | 4870 return JNI_ERR; |
| 4871 } | |
| 4872 | |
| 4873 // Make the stack size a multiple of the page size so that | |
| 4874 // the yellow/red zones can be guarded. | |
| 4875 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
| 4876 vm_page_size())); | |
| 4877 | |
| 4878 Linux::capture_initial_stack(JavaThread::stack_size_at_create()); | |
| 4879 | |
|
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
|
4880 #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
|
4881 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
|
4882 #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
|
4883 |
| 0 | 4884 Linux::libpthread_init(); |
| 4885 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 4886 tty->print_cr("[HotSpot is running with %s, %s(%s)]\n", | |
| 4887 Linux::glibc_version(), Linux::libpthread_version(), | |
| 4888 Linux::is_floating_stack() ? "floating stack" : "fixed stack"); | |
| 4889 } | |
| 4890 | |
| 141 | 4891 if (UseNUMA) { |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4892 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
|
4893 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4894 } else { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4895 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
|
4896 // 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
|
4897 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4898 } |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4899 } |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4900 // 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
|
4901 // 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
|
4902 // 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
|
4903 // disable adaptive resizing. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4904 if (UseNUMA && UseLargePages && !can_commit_large_page_memory()) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4905 if (FLAG_IS_DEFAULT(UseNUMA)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4906 UseNUMA = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4907 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4908 if (FLAG_IS_DEFAULT(UseLargePages) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4909 FLAG_IS_DEFAULT(UseSHM) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4910 FLAG_IS_DEFAULT(UseHugeTLBFS)) { |
|
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4911 UseLargePages = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4912 } else { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4913 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
|
4914 UseAdaptiveSizePolicy = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4915 UseAdaptiveNUMAChunkSizing = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4916 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4917 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4918 } |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4919 if (!UseNUMA && ForceNUMA) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4920 UseNUMA = true; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4921 } |
| 141 | 4922 } |
| 4923 | |
| 0 | 4924 if (MaxFDLimit) { |
| 4925 // set the number of file descriptors to max. print out error | |
| 4926 // if getrlimit/setrlimit fails but continue regardless. | |
| 4927 struct rlimit nbr_files; | |
| 4928 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4929 if (status != 0) { | |
| 4930 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4931 perror("os::init_2 getrlimit failed"); | |
| 4932 } else { | |
| 4933 nbr_files.rlim_cur = nbr_files.rlim_max; | |
| 4934 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4935 if (status != 0) { | |
| 4936 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4937 perror("os::init_2 setrlimit failed"); | |
| 4938 } | |
| 4939 } | |
| 4940 } | |
| 4941 | |
| 4942 // Initialize lock used to serialize thread creation (see os::create_thread) | |
| 4943 Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false)); | |
| 4944 | |
| 4945 // at-exit methods are called in the reverse order of their registration. | |
| 4946 // atexit functions are called on return from main or as a result of a | |
| 4947 // call to exit(3C). There can be only 32 of these functions registered | |
| 4948 // and atexit() does not set errno. | |
| 4949 | |
| 4950 if (PerfAllowAtExitRegistration) { | |
| 4951 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 4952 // atexit functions can be delayed until process exit time, which | |
| 4953 // can be problematic for embedded VM situations. Embedded VMs should | |
| 4954 // call DestroyJavaVM() to assure that VM resources are released. | |
| 4955 | |
| 4956 // note: perfMemory_exit_helper atexit function may be removed in | |
| 4957 // the future if the appropriate cleanup code can be added to the | |
| 4958 // VM_Exit VMOperation's doit method. | |
| 4959 if (atexit(perfMemory_exit_helper) != 0) { | |
| 14391 | 4960 warning("os::init_2 atexit(perfMemory_exit_helper) failed"); |
| 0 | 4961 } |
| 4962 } | |
| 4963 | |
| 4964 // initialize thread priority policy | |
| 4965 prio_init(); | |
| 4966 | |
| 4967 return JNI_OK; | |
| 4968 } | |
| 4969 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4970 // this is called at the end of vm_initialization |
| 14391 | 4971 void os::init_3(void) { |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4972 #ifdef JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4973 // Start the MemNotifyThread |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4974 if (LowMemoryProtection) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4975 MemNotifyThread::start(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4976 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4977 return; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4978 #endif |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4979 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
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diff
changeset
|
4980 |
| 0 | 4981 // Mark the polling page as unreadable |
| 4982 void os::make_polling_page_unreadable(void) { | |
| 4983 if( !guard_memory((char*)_polling_page, Linux::page_size()) ) | |
| 4984 fatal("Could not disable polling page"); | |
| 4985 }; | |
| 4986 | |
| 4987 // Mark the polling page as readable | |
| 4988 void os::make_polling_page_readable(void) { | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
4989 if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) { |
| 0 | 4990 fatal("Could not enable polling page"); |
|
237
1fdb98a17101
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235
diff
changeset
|
4991 } |
| 0 | 4992 }; |
| 4993 | |
| 4994 int os::active_processor_count() { | |
| 4995 // Linux doesn't yet have a (official) notion of processor sets, | |
| 4996 // so just return the number of online processors. | |
| 4997 int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); | |
| 4998 assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); | |
| 4999 return online_cpus; | |
| 5000 } | |
| 5001 | |
| 4006 | 5002 void os::set_native_thread_name(const char *name) { |
| 5003 // Not yet implemented. | |
| 5004 return; | |
| 5005 } | |
| 5006 | |
| 0 | 5007 bool os::distribute_processes(uint length, uint* distribution) { |
| 5008 // Not yet implemented. | |
| 5009 return false; | |
| 5010 } | |
| 5011 | |
| 5012 bool os::bind_to_processor(uint processor_id) { | |
| 5013 // Not yet implemented. | |
| 5014 return false; | |
| 5015 } | |
| 5016 | |
| 5017 /// | |
| 5018 | |
| 10405 | 5019 void os::SuspendedThreadTask::internal_do_task() { |
| 5020 if (do_suspend(_thread->osthread())) { | |
| 5021 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); | |
| 5022 do_task(context); | |
| 5023 do_resume(_thread->osthread()); | |
| 5024 } | |
| 5025 } | |
| 5026 | |
| 5027 class PcFetcher : public os::SuspendedThreadTask { | |
| 5028 public: | |
| 5029 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} | |
| 5030 ExtendedPC result(); | |
| 5031 protected: | |
| 5032 void do_task(const os::SuspendedThreadTaskContext& context); | |
| 5033 private: | |
| 5034 ExtendedPC _epc; | |
| 5035 }; | |
| 5036 | |
| 5037 ExtendedPC PcFetcher::result() { | |
| 5038 guarantee(is_done(), "task is not done yet."); | |
| 5039 return _epc; | |
| 5040 } | |
| 5041 | |
| 5042 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { | |
| 5043 Thread* thread = context.thread(); | |
| 5044 OSThread* osthread = thread->osthread(); | |
| 5045 if (osthread->ucontext() != NULL) { | |
| 5046 _epc = os::Linux::ucontext_get_pc((ucontext_t *) context.ucontext()); | |
| 5047 } else { | |
| 5048 // NULL context is unexpected, double-check this is the VMThread | |
| 5049 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); | |
| 5050 } | |
| 5051 } | |
| 5052 | |
| 0 | 5053 // Suspends the target using the signal mechanism and then grabs the PC before |
| 5054 // resuming the target. Used by the flat-profiler only | |
| 5055 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 5056 // Make sure that it is called by the watcher for the VMThread | |
| 5057 assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); | |
| 5058 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
| 5059 | |
| 10405 | 5060 PcFetcher fetcher(thread); |
| 5061 fetcher.run(); | |
| 5062 return fetcher.result(); | |
| 0 | 5063 } |
| 5064 | |
| 5065 int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) | |
| 5066 { | |
| 5067 if (is_NPTL()) { | |
| 5068 return pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 5069 } else { | |
| 5070 // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control | |
| 5071 // word back to default 64bit precision if condvar is signaled. Java | |
| 5072 // wants 53bit precision. Save and restore current value. | |
| 5073 int fpu = get_fpu_control_word(); | |
| 5074 int status = pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 5075 set_fpu_control_word(fpu); | |
| 5076 return status; | |
| 5077 } | |
| 5078 } | |
| 5079 | |
| 5080 //////////////////////////////////////////////////////////////////////////////// | |
| 5081 // debug support | |
| 5082 | |
|
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bobv
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diff
changeset
|
5083 bool os::find(address addr, outputStream* st) { |
| 0 | 5084 Dl_info dlinfo; |
| 5085 memset(&dlinfo, 0, sizeof(dlinfo)); | |
|
11092
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dcubed
parents:
10986
diff
changeset
|
5086 if (dladdr(addr, &dlinfo) != 0) { |
|
1681
126ea7725993
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bobv
parents:
1642
diff
changeset
|
5087 st->print(PTR_FORMAT ": ", addr); |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5088 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5089 st->print("%s+%#x", dlinfo.dli_sname, |
| 0 | 5090 addr - (intptr_t)dlinfo.dli_saddr); |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5091 } else if (dlinfo.dli_fbase != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5092 st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
| 0 | 5093 } else { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5094 st->print("<absolute address>"); |
| 0 | 5095 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5096 if (dlinfo.dli_fname != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5097 st->print(" in %s", dlinfo.dli_fname); |
| 0 | 5098 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5099 if (dlinfo.dli_fbase != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5100 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
| 0 | 5101 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5102 st->cr(); |
| 0 | 5103 |
| 5104 if (Verbose) { | |
| 5105 // decode some bytes around the PC | |
|
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
5106 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
|
5107 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
| 0 | 5108 address lowest = (address) dlinfo.dli_sname; |
| 5109 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
| 5110 if (begin < lowest) begin = lowest; | |
| 5111 Dl_info dlinfo2; | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5112 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
| 0 | 5113 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) |
| 5114 end = (address) dlinfo2.dli_saddr; | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5115 Disassembler::decode(begin, end, st); |
| 0 | 5116 } |
| 5117 return true; | |
| 5118 } | |
| 5119 return false; | |
| 5120 } | |
| 5121 | |
| 5122 //////////////////////////////////////////////////////////////////////////////// | |
| 5123 // misc | |
| 5124 | |
| 5125 // This does not do anything on Linux. This is basically a hook for being | |
| 5126 // able to use structured exception handling (thread-local exception filters) | |
| 5127 // on, e.g., Win32. | |
| 5128 void | |
| 5129 os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, | |
| 5130 JavaCallArguments* args, Thread* thread) { | |
| 5131 f(value, method, args, thread); | |
| 5132 } | |
| 5133 | |
| 5134 void os::print_statistics() { | |
| 5135 } | |
| 5136 | |
| 5137 int os::message_box(const char* title, const char* message) { | |
| 5138 int i; | |
| 5139 fdStream err(defaultStream::error_fd()); | |
| 5140 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 5141 err.cr(); | |
| 5142 err.print_raw_cr(title); | |
| 5143 for (i = 0; i < 78; i++) err.print_raw("-"); | |
| 5144 err.cr(); | |
| 5145 err.print_raw_cr(message); | |
| 5146 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 5147 err.cr(); | |
| 5148 | |
| 5149 char buf[16]; | |
| 5150 // Prevent process from exiting upon "read error" without consuming all CPU | |
| 5151 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
| 5152 | |
| 5153 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 5154 } | |
| 5155 | |
| 5156 int os::stat(const char *path, struct stat *sbuf) { | |
| 5157 char pathbuf[MAX_PATH]; | |
| 5158 if (strlen(path) > MAX_PATH - 1) { | |
| 5159 errno = ENAMETOOLONG; | |
| 5160 return -1; | |
| 5161 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5162 os::native_path(strcpy(pathbuf, path)); |
| 0 | 5163 return ::stat(pathbuf, sbuf); |
| 5164 } | |
| 5165 | |
| 5166 bool os::check_heap(bool force) { | |
| 5167 return true; | |
| 5168 } | |
| 5169 | |
| 5170 int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { | |
| 5171 return ::vsnprintf(buf, count, format, args); | |
| 5172 } | |
| 5173 | |
| 5174 // Is a (classpath) directory empty? | |
| 5175 bool os::dir_is_empty(const char* path) { | |
| 5176 DIR *dir = NULL; | |
| 5177 struct dirent *ptr; | |
| 5178 | |
| 5179 dir = opendir(path); | |
| 5180 if (dir == NULL) return true; | |
| 5181 | |
| 5182 /* Scan the directory */ | |
| 5183 bool result = true; | |
| 5184 char buf[sizeof(struct dirent) + MAX_PATH]; | |
| 5185 while (result && (ptr = ::readdir(dir)) != NULL) { | |
| 5186 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
| 5187 result = false; | |
| 5188 } | |
| 5189 } | |
| 5190 closedir(dir); | |
| 5191 return result; | |
| 5192 } | |
| 5193 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5194 // This code originates from JDK's sysOpen and open64_w |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5195 // from src/solaris/hpi/src/system_md.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5196 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5197 #ifndef O_DELETE |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5198 #define O_DELETE 0x10000 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5199 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5200 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5201 // Open a file. Unlink the file immediately after open returns |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5202 // if the specified oflag has the O_DELETE flag set. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5203 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5204 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5205 int os::open(const char *path, int oflag, int mode) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5206 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5207 if (strlen(path) > MAX_PATH - 1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5208 errno = ENAMETOOLONG; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5209 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5210 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5211 int fd; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5212 int o_delete = (oflag & O_DELETE); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5213 oflag = oflag & ~O_DELETE; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5214 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5215 fd = ::open64(path, oflag, mode); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5216 if (fd == -1) return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5217 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5218 //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
|
5219 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5220 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5221 int ret = ::fstat64(fd, &buf64); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5222 int st_mode = buf64.st_mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5223 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5224 if (ret != -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5225 if ((st_mode & S_IFMT) == S_IFDIR) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5226 errno = EISDIR; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5227 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5228 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5229 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5230 } else { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5231 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5232 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5233 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5234 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5235 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5236 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5237 * 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
|
5238 * specifically destined for a subprocess should have the |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5239 * 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
|
5240 * 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
|
5241 * 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
|
5242 * UNIXProcess.c), and this in turn might: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5243 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5244 * - 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
|
5245 * descriptors, resulting in mysterious hangs, or |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5246 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5247 * - 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
|
5248 * suffering from bug 1085341. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5249 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5250 * (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
|
5251 * design flaw) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5252 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5253 * See: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5254 * 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
|
5255 * 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
|
5256 * 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
|
5257 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5258 #ifdef FD_CLOEXEC |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5259 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5260 int flags = ::fcntl(fd, F_GETFD); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5261 if (flags != -1) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5262 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5263 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5264 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5265 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5266 if (o_delete != 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5267 ::unlink(path); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5268 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5269 return fd; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5270 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5271 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5272 |
| 0 | 5273 // create binary file, rewriting existing file if required |
| 5274 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 5275 int oflags = O_WRONLY | O_CREAT; | |
| 5276 if (!rewrite_existing) { | |
| 5277 oflags |= O_EXCL; | |
| 5278 } | |
| 5279 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
| 5280 } | |
| 5281 | |
| 5282 // return current position of file pointer | |
| 5283 jlong os::current_file_offset(int fd) { | |
| 5284 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
| 5285 } | |
| 5286 | |
| 5287 // move file pointer to the specified offset | |
| 5288 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 5289 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
| 5290 } | |
| 5291 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5292 // This code originates from JDK's sysAvailable |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5293 // 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
|
5294 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5295 int os::available(int fd, jlong *bytes) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5296 jlong cur, end; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5297 int mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5298 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5299 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5300 if (::fstat64(fd, &buf64) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5301 mode = buf64.st_mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5302 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
|
5303 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5304 * 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
|
5305 * 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
|
5306 * blocking, interruptible calls in this file. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5307 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5308 int n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5309 if (::ioctl(fd, FIONREAD, &n) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5310 *bytes = n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5311 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5312 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5313 } |
|
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 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5316 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5317 } 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
|
5318 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5319 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5320 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5321 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5322 *bytes = end - cur; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5323 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5324 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5325 |
|
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5326 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
|
5327 // 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
|
5328 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
|
5329 |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5330 //%% 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
|
5331 // 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
|
5332 return (ret < 0) ? 0 : 1; |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5333 } |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5334 |
| 0 | 5335 // Map a block of memory. |
| 6197 | 5336 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 5337 char *addr, size_t bytes, bool read_only, |
| 5338 bool allow_exec) { | |
| 5339 int prot; | |
| 5909 | 5340 int flags = MAP_PRIVATE; |
| 0 | 5341 |
| 5342 if (read_only) { | |
| 5343 prot = PROT_READ; | |
| 5344 } else { | |
| 5345 prot = PROT_READ | PROT_WRITE; | |
| 5346 } | |
| 5347 | |
| 5348 if (allow_exec) { | |
| 5349 prot |= PROT_EXEC; | |
| 5350 } | |
| 5351 | |
| 5352 if (addr != NULL) { | |
| 5353 flags |= MAP_FIXED; | |
| 5354 } | |
| 5355 | |
| 5356 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
| 5357 fd, file_offset); | |
| 5358 if (mapped_address == MAP_FAILED) { | |
| 5359 return NULL; | |
| 5360 } | |
| 5361 return mapped_address; | |
| 5362 } | |
| 5363 | |
| 5364 | |
| 5365 // Remap a block of memory. | |
| 6197 | 5366 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 5367 char *addr, size_t bytes, bool read_only, |
| 5368 bool allow_exec) { | |
| 5369 // same as map_memory() on this OS | |
| 5370 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 5371 allow_exec); | |
| 5372 } | |
| 5373 | |
| 5374 | |
| 5375 // Unmap a block of memory. | |
| 6197 | 5376 bool os::pd_unmap_memory(char* addr, size_t bytes) { |
| 0 | 5377 return munmap(addr, bytes) == 0; |
| 5378 } | |
| 5379 | |
| 5380 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time); | |
| 5381 | |
| 5382 static clockid_t thread_cpu_clockid(Thread* thread) { | |
| 5383 pthread_t tid = thread->osthread()->pthread_id(); | |
| 5384 clockid_t clockid; | |
| 5385 | |
| 5386 // Get thread clockid | |
| 5387 int rc = os::Linux::pthread_getcpuclockid(tid, &clockid); | |
| 5388 assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code"); | |
| 5389 return clockid; | |
| 5390 } | |
| 5391 | |
| 5392 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 5393 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 5394 // of a thread. | |
| 5395 // | |
| 5396 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
| 5397 // the fast estimate available on the platform. | |
| 5398 | |
| 5399 jlong os::current_thread_cpu_time() { | |
| 5400 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 5401 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 5402 } else { | |
| 5403 // return user + sys since the cost is the same | |
| 5404 return slow_thread_cpu_time(Thread::current(), true /* user + sys */); | |
| 5405 } | |
| 5406 } | |
| 5407 | |
| 5408 jlong os::thread_cpu_time(Thread* thread) { | |
| 5409 // consistent with what current_thread_cpu_time() returns | |
| 5410 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 5411 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 5412 } else { | |
| 5413 return slow_thread_cpu_time(thread, true /* user + sys */); | |
| 5414 } | |
| 5415 } | |
| 5416 | |
| 5417 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 5418 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 5419 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 5420 } else { | |
| 5421 return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 5422 } | |
| 5423 } | |
| 5424 | |
| 5425 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5426 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 5427 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 5428 } else { | |
| 5429 return slow_thread_cpu_time(thread, user_sys_cpu_time); | |
| 5430 } | |
| 5431 } | |
| 5432 | |
| 5433 // | |
| 5434 // -1 on error. | |
| 5435 // | |
| 5436 | |
| 5437 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5438 static bool proc_task_unchecked = true; | |
| 5439 static const char *proc_stat_path = "/proc/%d/stat"; | |
| 5440 pid_t tid = thread->osthread()->thread_id(); | |
| 5441 char *s; | |
| 5442 char stat[2048]; | |
| 5443 int statlen; | |
| 5444 char proc_name[64]; | |
| 5445 int count; | |
| 5446 long sys_time, user_time; | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5447 char cdummy; |
| 0 | 5448 int idummy; |
| 5449 long ldummy; | |
| 5450 FILE *fp; | |
| 5451 | |
| 5452 // The /proc/<tid>/stat aggregates per-process usage on | |
| 5453 // new Linux kernels 2.6+ where NPTL is supported. | |
| 5454 // The /proc/self/task/<tid>/stat still has the per-thread usage. | |
| 5455 // See bug 6328462. | |
|
8099
4c1d8002ffb1
8004495: [parfait] False positive Buffer overflow in hotspot/src/os/linux/vm/os_linux.cpp
hseigel
parents:
8067
diff
changeset
|
5456 // There possibly can be cases where there is no directory |
|
4c1d8002ffb1
8004495: [parfait] False positive Buffer overflow in hotspot/src/os/linux/vm/os_linux.cpp
hseigel
parents:
8067
diff
changeset
|
5457 // /proc/self/task, so we check its availability. |
| 0 | 5458 if (proc_task_unchecked && os::Linux::is_NPTL()) { |
| 5459 // This is executed only once | |
| 5460 proc_task_unchecked = false; | |
| 5461 fp = fopen("/proc/self/task", "r"); | |
| 5462 if (fp != NULL) { | |
| 5463 proc_stat_path = "/proc/self/task/%d/stat"; | |
| 5464 fclose(fp); | |
| 5465 } | |
| 5466 } | |
| 5467 | |
| 5468 sprintf(proc_name, proc_stat_path, tid); | |
| 5469 fp = fopen(proc_name, "r"); | |
| 5470 if ( fp == NULL ) return -1; | |
| 5471 statlen = fread(stat, 1, 2047, fp); | |
| 5472 stat[statlen] = '\0'; | |
| 5473 fclose(fp); | |
| 5474 | |
| 5475 // Skip pid and the command string. Note that we could be dealing with | |
| 5476 // weird command names, e.g. user could decide to rename java launcher | |
| 5477 // to "java 1.4.2 :)", then the stat file would look like | |
| 5478 // 1234 (java 1.4.2 :)) R ... ... | |
| 5479 // We don't really need to know the command string, just find the last | |
| 5480 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 5481 s = strrchr(stat, ')'); | |
| 5482 if (s == NULL ) return -1; | |
| 5483 | |
| 5484 // Skip blank chars | |
| 5485 do s++; while (isspace(*s)); | |
| 5486 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5487 count = sscanf(s,"%c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu", |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5488 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy, |
| 0 | 5489 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy, |
| 5490 &user_time, &sys_time); | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5491 if ( count != 13 ) return -1; |
| 0 | 5492 if (user_sys_cpu_time) { |
| 5493 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); | |
| 5494 } else { | |
| 5495 return (jlong)user_time * (1000000000 / clock_tics_per_sec); | |
| 5496 } | |
| 5497 } | |
| 5498 | |
| 5499 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5500 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5501 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5502 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5503 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 5504 } | |
| 5505 | |
| 5506 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5507 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5508 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5509 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5510 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 5511 } | |
| 5512 | |
| 5513 bool os::is_thread_cpu_time_supported() { | |
| 5514 return true; | |
| 5515 } | |
| 5516 | |
| 5517 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 5518 // Linux doesn't yet have a (official) notion of processor sets, | |
| 5519 // so just return the system wide load average. | |
| 5520 int os::loadavg(double loadavg[], int nelem) { | |
| 5521 return ::getloadavg(loadavg, nelem); | |
| 5522 } | |
| 5523 | |
| 5524 void os::pause() { | |
| 5525 char filename[MAX_PATH]; | |
| 5526 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 5527 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 5528 } else { | |
| 5529 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 5530 } | |
| 5531 | |
| 5532 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 5533 if (fd != -1) { | |
| 5534 struct stat buf; | |
|
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|
5535 ::close(fd); |
| 0 | 5536 while (::stat(filename, &buf) == 0) { |
| 5537 (void)::poll(NULL, 0, 100); | |
| 5538 } | |
| 5539 } else { | |
| 5540 jio_fprintf(stderr, | |
| 5541 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 5542 } | |
| 5543 } | |
| 5544 | |
| 5545 | |
| 5546 // Refer to the comments in os_solaris.cpp park-unpark. | |
| 5547 // | |
| 5548 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can | |
| 5549 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. | |
| 5550 // For specifics regarding the bug see GLIBC BUGID 261237 : | |
| 5551 // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. | |
| 5552 // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future | |
| 5553 // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar | |
| 5554 // is used. (The simple C test-case provided in the GLIBC bug report manifests the | |
| 5555 // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() | |
| 5556 // and monitorenter when we're using 1-0 locking. All those operations may result in | |
| 5557 // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version | |
| 5558 // of libpthread avoids the problem, but isn't practical. | |
| 5559 // | |
| 5560 // Possible remedies: | |
| 5561 // | |
| 5562 // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. | |
| 5563 // This is palliative and probabilistic, however. If the thread is preempted | |
| 5564 // between the call to compute_abstime() and pthread_cond_timedwait(), more | |
| 5565 // than the minimum period may have passed, and the abstime may be stale (in the | |
| 5566 // past) resultin in a hang. Using this technique reduces the odds of a hang | |
| 5567 // but the JVM is still vulnerable, particularly on heavily loaded systems. | |
| 5568 // | |
| 5569 // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead | |
| 5570 // of the usual flag-condvar-mutex idiom. The write side of the pipe is set | |
| 5571 // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) | |
| 5572 // reduces to poll()+read(). This works well, but consumes 2 FDs per extant | |
| 5573 // thread. | |
| 5574 // | |
| 5575 // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread | |
| 5576 // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing | |
| 5577 // a timeout request to the chron thread and then blocking via pthread_cond_wait(). | |
| 5578 // This also works well. In fact it avoids kernel-level scalability impediments | |
| 5579 // on certain platforms that don't handle lots of active pthread_cond_timedwait() | |
| 5580 // timers in a graceful fashion. | |
| 5581 // | |
| 5582 // 4. When the abstime value is in the past it appears that control returns | |
| 5583 // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. | |
| 5584 // Subsequent timedwait/wait calls may hang indefinitely. Given that, we | |
| 5585 // can avoid the problem by reinitializing the condvar -- by cond_destroy() | |
| 5586 // followed by cond_init() -- after all calls to pthread_cond_timedwait(). | |
| 5587 // It may be possible to avoid reinitialization by checking the return | |
| 5588 // value from pthread_cond_timedwait(). In addition to reinitializing the | |
| 5589 // condvar we must establish the invariant that cond_signal() is only called | |
| 5590 // within critical sections protected by the adjunct mutex. This prevents | |
| 5591 // cond_signal() from "seeing" a condvar that's in the midst of being | |
| 5592 // reinitialized or that is corrupt. Sadly, this invariant obviates the | |
| 5593 // desirable signal-after-unlock optimization that avoids futile context switching. | |
| 5594 // | |
| 5595 // I'm also concerned that some versions of NTPL might allocate an auxilliary | |
| 5596 // structure when a condvar is used or initialized. cond_destroy() would | |
| 5597 // release the helper structure. Our reinitialize-after-timedwait fix | |
| 5598 // put excessive stress on malloc/free and locks protecting the c-heap. | |
| 5599 // | |
| 5600 // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. | |
| 5601 // It may be possible to refine (4) by checking the kernel and NTPL verisons | |
| 5602 // and only enabling the work-around for vulnerable environments. | |
| 5603 | |
| 5604 // utility to compute the abstime argument to timedwait: | |
| 5605 // millis is the relative timeout time | |
| 5606 // abstime will be the absolute timeout time | |
| 5607 // TODO: replace compute_abstime() with unpackTime() | |
| 5608 | |
| 5609 static struct timespec* compute_abstime(timespec* abstime, jlong millis) { | |
| 5610 if (millis < 0) millis = 0; | |
|
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|
5611 |
| 0 | 5612 jlong seconds = millis / 1000; |
| 5613 millis %= 1000; | |
| 5614 if (seconds > 50000000) { // see man cond_timedwait(3T) | |
| 5615 seconds = 50000000; | |
| 5616 } | |
|
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5617 |
|
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|
5618 if (os::Linux::supports_monotonic_clock()) { |
|
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|
5619 struct timespec now; |
|
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|
5620 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
|
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|
5621 assert_status(status == 0, status, "clock_gettime"); |
|
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|
5622 abstime->tv_sec = now.tv_sec + seconds; |
|
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|
5623 long nanos = now.tv_nsec + millis * NANOSECS_PER_MILLISEC; |
|
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|
5624 if (nanos >= NANOSECS_PER_SEC) { |
|
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|
5625 abstime->tv_sec += 1; |
|
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|
5626 nanos -= NANOSECS_PER_SEC; |
|
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|
5627 } |
|
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|
5628 abstime->tv_nsec = nanos; |
|
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|
5629 } else { |
|
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|
5630 struct timeval now; |
|
2e6938dd68f2
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|
5631 int status = gettimeofday(&now, NULL); |
|
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|
5632 assert(status == 0, "gettimeofday"); |
|
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|
5633 abstime->tv_sec = now.tv_sec + seconds; |
|
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|
5634 long usec = now.tv_usec + millis * 1000; |
|
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|
5635 if (usec >= 1000000) { |
|
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|
5636 abstime->tv_sec += 1; |
|
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|
5637 usec -= 1000000; |
|
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|
5638 } |
|
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|
5639 abstime->tv_nsec = usec * 1000; |
|
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|
5640 } |
| 0 | 5641 return abstime; |
| 5642 } | |
| 5643 | |
| 5644 | |
| 5645 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
| 5646 // Conceptually TryPark() should be equivalent to park(0). | |
| 5647 | |
| 5648 int os::PlatformEvent::TryPark() { | |
| 5649 for (;;) { | |
| 5650 const int v = _Event ; | |
| 5651 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 5652 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
| 5653 } | |
| 5654 } | |
| 5655 | |
| 5656 void os::PlatformEvent::park() { // AKA "down()" | |
| 5657 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 5658 // may call park(). | |
| 5659 // TODO: assert that _Assoc != NULL or _Assoc == Self | |
| 5660 int v ; | |
| 5661 for (;;) { | |
| 5662 v = _Event ; | |
| 5663 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5664 } | |
| 5665 guarantee (v >= 0, "invariant") ; | |
| 5666 if (v == 0) { | |
| 5667 // Do this the hard way by blocking ... | |
| 5668 int status = pthread_mutex_lock(_mutex); | |
| 5669 assert_status(status == 0, status, "mutex_lock"); | |
| 5670 guarantee (_nParked == 0, "invariant") ; | |
| 5671 ++ _nParked ; | |
| 5672 while (_Event < 0) { | |
| 5673 status = pthread_cond_wait(_cond, _mutex); | |
| 5674 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
| 5675 // Treat this the same as if the wait was interrupted | |
| 5676 if (status == ETIME) { status = EINTR; } | |
| 5677 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
| 5678 } | |
| 5679 -- _nParked ; | |
| 5680 | |
| 5681 _Event = 0 ; | |
| 5682 status = pthread_mutex_unlock(_mutex); | |
| 5683 assert_status(status == 0, status, "mutex_unlock"); | |
|
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|
5684 // Paranoia to ensure our locked and lock-free paths interact |
|
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|
5685 // correctly with each other. |
|
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|
5686 OrderAccess::fence(); |
| 0 | 5687 } |
| 5688 guarantee (_Event >= 0, "invariant") ; | |
| 5689 } | |
| 5690 | |
| 5691 int os::PlatformEvent::park(jlong millis) { | |
| 5692 guarantee (_nParked == 0, "invariant") ; | |
| 5693 | |
| 5694 int v ; | |
| 5695 for (;;) { | |
| 5696 v = _Event ; | |
| 5697 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5698 } | |
| 5699 guarantee (v >= 0, "invariant") ; | |
| 5700 if (v != 0) return OS_OK ; | |
| 5701 | |
| 5702 // We do this the hard way, by blocking the thread. | |
| 5703 // Consider enforcing a minimum timeout value. | |
| 5704 struct timespec abst; | |
| 5705 compute_abstime(&abst, millis); | |
| 5706 | |
| 5707 int ret = OS_TIMEOUT; | |
| 5708 int status = pthread_mutex_lock(_mutex); | |
| 5709 assert_status(status == 0, status, "mutex_lock"); | |
| 5710 guarantee (_nParked == 0, "invariant") ; | |
| 5711 ++_nParked ; | |
| 5712 | |
| 5713 // Object.wait(timo) will return because of | |
| 5714 // (a) notification | |
| 5715 // (b) timeout | |
| 5716 // (c) thread.interrupt | |
| 5717 // | |
| 5718 // Thread.interrupt and object.notify{All} both call Event::set. | |
| 5719 // That is, we treat thread.interrupt as a special case of notification. | |
| 5720 // The underlying Solaris implementation, cond_timedwait, admits | |
| 5721 // spurious/premature wakeups, but the JLS/JVM spec prevents the | |
| 5722 // JVM from making those visible to Java code. As such, we must | |
| 5723 // filter out spurious wakeups. We assume all ETIME returns are valid. | |
| 5724 // | |
| 5725 // TODO: properly differentiate simultaneous notify+interrupt. | |
| 5726 // In that case, we should propagate the notify to another waiter. | |
| 5727 | |
| 5728 while (_Event < 0) { | |
| 5729 status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst); | |
| 5730 if (status != 0 && WorkAroundNPTLTimedWaitHang) { | |
| 5731 pthread_cond_destroy (_cond); | |
|
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|
5732 pthread_cond_init (_cond, os::Linux::condAttr()) ; |
| 0 | 5733 } |
| 5734 assert_status(status == 0 || status == EINTR || | |
| 5735 status == ETIME || status == ETIMEDOUT, | |
| 5736 status, "cond_timedwait"); | |
| 5737 if (!FilterSpuriousWakeups) break ; // previous semantics | |
| 5738 if (status == ETIME || status == ETIMEDOUT) break ; | |
| 5739 // We consume and ignore EINTR and spurious wakeups. | |
| 5740 } | |
| 5741 --_nParked ; | |
| 5742 if (_Event >= 0) { | |
| 5743 ret = OS_OK; | |
| 5744 } | |
| 5745 _Event = 0 ; | |
| 5746 status = pthread_mutex_unlock(_mutex); | |
| 5747 assert_status(status == 0, status, "mutex_unlock"); | |
| 5748 assert (_nParked == 0, "invariant") ; | |
|
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|
5749 // Paranoia to ensure our locked and lock-free paths interact |
|
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|
5750 // correctly with each other. |
|
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changeset
|
5751 OrderAccess::fence(); |
| 0 | 5752 return ret; |
| 5753 } | |
| 5754 | |
| 5755 void os::PlatformEvent::unpark() { | |
|
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|
5756 // Transitions for _Event: |
|
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|
5757 // 0 :=> 1 |
|
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|
5758 // 1 :=> 1 |
|
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|
5759 // -1 :=> either 0 or 1; must signal target thread |
|
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|
5760 // That is, we can safely transition _Event from -1 to either |
|
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|
5761 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back |
|
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|
5762 // unpark() calls. |
|
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|
5763 // See also: "Semaphores in Plan 9" by Mullender & Cox |
|
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|
5764 // |
|
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|
5765 // Note: Forcing a transition from "-1" to "1" on an unpark() means |
|
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|
5766 // that it will take two back-to-back park() calls for the owning |
|
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|
5767 // thread to block. This has the benefit of forcing a spurious return |
|
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|
5768 // from the first park() call after an unpark() call which will help |
|
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changeset
|
5769 // shake out uses of park() and unpark() without condition variables. |
|
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|
5770 |
|
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|
5771 if (Atomic::xchg(1, &_Event) >= 0) return; |
|
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|
5772 |
|
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changeset
|
5773 // Wait for the thread associated with the event to vacate |
|
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changeset
|
5774 int status = pthread_mutex_lock(_mutex); |
|
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changeset
|
5775 assert_status(status == 0, status, "mutex_lock"); |
|
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|
5776 int AnyWaiters = _nParked; |
|
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|
5777 assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
|
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|
5778 if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
|
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|
5779 AnyWaiters = 0; |
|
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|
5780 pthread_cond_signal(_cond); |
|
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|
5781 } |
|
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|
5782 status = pthread_mutex_unlock(_mutex); |
|
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|
5783 assert_status(status == 0, status, "mutex_unlock"); |
|
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|
5784 if (AnyWaiters != 0) { |
|
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|
5785 status = pthread_cond_signal(_cond); |
|
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|
5786 assert_status(status == 0, status, "cond_signal"); |
| 0 | 5787 } |
| 5788 | |
| 5789 // Note that we signal() _after dropping the lock for "immortal" Events. | |
| 5790 // This is safe and avoids a common class of futile wakeups. In rare | |
| 5791 // circumstances this can cause a thread to return prematurely from | |
| 5792 // cond_{timed}wait() but the spurious wakeup is benign and the victim will | |
| 5793 // simply re-test the condition and re-park itself. | |
| 5794 } | |
| 5795 | |
| 5796 | |
| 5797 // JSR166 | |
| 5798 // ------------------------------------------------------- | |
| 5799 | |
| 5800 /* | |
| 5801 * The solaris and linux implementations of park/unpark are fairly | |
| 5802 * conservative for now, but can be improved. They currently use a | |
| 5803 * mutex/condvar pair, plus a a count. | |
| 5804 * Park decrements count if > 0, else does a condvar wait. Unpark | |
| 5805 * sets count to 1 and signals condvar. Only one thread ever waits | |
| 5806 * on the condvar. Contention seen when trying to park implies that someone | |
| 5807 * is unparking you, so don't wait. And spurious returns are fine, so there | |
| 5808 * is no need to track notifications. | |
| 5809 */ | |
| 5810 | |
| 5811 /* | |
| 5812 * This code is common to linux and solaris and will be moved to a | |
| 5813 * common place in dolphin. | |
| 5814 * | |
| 5815 * The passed in time value is either a relative time in nanoseconds | |
| 5816 * or an absolute time in milliseconds. Either way it has to be unpacked | |
| 5817 * into suitable seconds and nanoseconds components and stored in the | |
| 5818 * given timespec structure. | |
| 5819 * Given time is a 64-bit value and the time_t used in the timespec is only | |
| 5820 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
| 5821 * overflow if times way in the future are given. Further on Solaris versions | |
| 5822 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
| 5823 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
| 5824 * As it will be 28 years before "now + 100000000" will overflow we can | |
| 5825 * ignore overflow and just impose a hard-limit on seconds using the value | |
| 5826 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
| 5827 * years from "now". | |
| 5828 */ | |
| 5829 | |
| 5830 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
| 5831 assert (time > 0, "convertTime"); | |
|
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|
5832 time_t max_secs = 0; |
|
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|
5833 |
|
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|
5834 if (!os::Linux::supports_monotonic_clock() || isAbsolute) { |
|
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|
5835 struct timeval now; |
|
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|
5836 int status = gettimeofday(&now, NULL); |
|
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|
5837 assert(status == 0, "gettimeofday"); |
|
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|
5838 |
|
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|
5839 max_secs = now.tv_sec + MAX_SECS; |
|
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|
5840 |
|
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|
5841 if (isAbsolute) { |
|
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|
5842 jlong secs = time / 1000; |
|
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|
5843 if (secs > max_secs) { |
|
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|
5844 absTime->tv_sec = max_secs; |
|
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|
5845 } else { |
|
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|
5846 absTime->tv_sec = secs; |
|
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|
5847 } |
|
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|
5848 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
|
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|
5849 } else { |
|
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|
5850 jlong secs = time / NANOSECS_PER_SEC; |
|
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|
5851 if (secs >= MAX_SECS) { |
|
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|
5852 absTime->tv_sec = max_secs; |
|
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|
5853 absTime->tv_nsec = 0; |
|
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|
5854 } else { |
|
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|
5855 absTime->tv_sec = now.tv_sec + secs; |
|
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|
5856 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
|
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|
5857 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
|
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changeset
|
5858 absTime->tv_nsec -= NANOSECS_PER_SEC; |
|
2e6938dd68f2
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changeset
|
5859 ++absTime->tv_sec; // note: this must be <= max_secs |
|
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changeset
|
5860 } |
|
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|
5861 } |
| 0 | 5862 } |
|
12211
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|
5863 } else { |
|
2e6938dd68f2
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changeset
|
5864 // must be relative using monotonic clock |
|
2e6938dd68f2
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changeset
|
5865 struct timespec now; |
|
2e6938dd68f2
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12182
diff
changeset
|
5866 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
|
2e6938dd68f2
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changeset
|
5867 assert_status(status == 0, status, "clock_gettime"); |
|
2e6938dd68f2
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changeset
|
5868 max_secs = now.tv_sec + MAX_SECS; |
| 0 | 5869 jlong secs = time / NANOSECS_PER_SEC; |
| 5870 if (secs >= MAX_SECS) { | |
| 5871 absTime->tv_sec = max_secs; | |
| 5872 absTime->tv_nsec = 0; | |
|
12211
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|
5873 } else { |
| 0 | 5874 absTime->tv_sec = now.tv_sec + secs; |
|
12211
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changeset
|
5875 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_nsec; |
| 0 | 5876 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
| 5877 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
| 5878 ++absTime->tv_sec; // note: this must be <= max_secs | |
| 5879 } | |
| 5880 } | |
| 5881 } | |
| 5882 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
| 5883 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
| 5884 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
| 5885 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
| 5886 } | |
| 5887 | |
| 5888 void Parker::park(bool isAbsolute, jlong time) { | |
|
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changeset
|
5889 // Ideally we'd do something useful while spinning, such |
|
22ba8c8ce6a6
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diff
changeset
|
5890 // as calling unpackTime(). |
|
22ba8c8ce6a6
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diff
changeset
|
5891 |
| 0 | 5892 // Optional fast-path check: |
| 5893 // Return immediately if a permit is available. | |
|
7629
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changeset
|
5894 // We depend on Atomic::xchg() having full barrier semantics |
|
22ba8c8ce6a6
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diff
changeset
|
5895 // since we are doing a lock-free update to _counter. |
|
22ba8c8ce6a6
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7456
diff
changeset
|
5896 if (Atomic::xchg(0, &_counter) > 0) return; |
| 0 | 5897 |
| 5898 Thread* thread = Thread::current(); | |
| 5899 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 5900 JavaThread *jt = (JavaThread *)thread; | |
| 5901 | |
| 5902 // Optional optimization -- avoid state transitions if there's an interrupt pending. | |
| 5903 // Check interrupt before trying to wait | |
| 5904 if (Thread::is_interrupted(thread, false)) { | |
| 5905 return; | |
| 5906 } | |
| 5907 | |
| 5908 // Next, demultiplex/decode time arguments | |
| 5909 timespec absTime; | |
|
1865
1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
acorn
parents:
1750
diff
changeset
|
5910 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
| 0 | 5911 return; |
| 5912 } | |
| 5913 if (time > 0) { | |
| 5914 unpackTime(&absTime, isAbsolute, time); | |
| 5915 } | |
| 5916 | |
| 5917 | |
| 5918 // Enter safepoint region | |
| 5919 // Beware of deadlocks such as 6317397. | |
| 5920 // The per-thread Parker:: mutex is a classic leaf-lock. | |
| 5921 // In particular a thread must never block on the Threads_lock while | |
| 5922 // holding the Parker:: mutex. If safepoints are pending both the | |
| 5923 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
| 5924 ThreadBlockInVM tbivm(jt); | |
| 5925 | |
| 5926 // Don't wait if cannot get lock since interference arises from | |
| 5927 // unblocking. Also. check interrupt before trying wait | |
| 5928 if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { | |
| 5929 return; | |
| 5930 } | |
| 5931 | |
| 5932 int status ; | |
| 5933 if (_counter > 0) { // no wait needed | |
| 5934 _counter = 0; | |
| 5935 status = pthread_mutex_unlock(_mutex); | |
| 5936 assert (status == 0, "invariant") ; | |
|
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|
5937 // Paranoia to ensure our locked and lock-free paths interact |
|
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changeset
|
5938 // correctly with each other and Java-level accesses. |
|
1117
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6822370: ReentrantReadWriteLock: threads hung when there are no threads holding onto the lock (Netra x4450)
dholmes
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1010
diff
changeset
|
5939 OrderAccess::fence(); |
| 0 | 5940 return; |
| 5941 } | |
| 5942 | |
| 5943 #ifdef ASSERT | |
| 5944 // Don't catch signals while blocked; let the running threads have the signals. | |
| 5945 // (This allows a debugger to break into the running thread.) | |
| 5946 sigset_t oldsigs; | |
| 5947 sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals(); | |
| 5948 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
| 5949 #endif | |
| 5950 | |
| 5951 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 5952 jt->set_suspend_equivalent(); | |
| 5953 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 5954 | |
|
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|
5955 assert(_cur_index == -1, "invariant"); |
| 0 | 5956 if (time == 0) { |
|
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|
5957 _cur_index = REL_INDEX; // arbitrary choice when not timed |
|
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|
5958 status = pthread_cond_wait (&_cond[_cur_index], _mutex) ; |
| 0 | 5959 } else { |
|
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changeset
|
5960 _cur_index = isAbsolute ? ABS_INDEX : REL_INDEX; |
|
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changeset
|
5961 status = os::Linux::safe_cond_timedwait (&_cond[_cur_index], _mutex, &absTime) ; |
| 0 | 5962 if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
|
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|
5963 pthread_cond_destroy (&_cond[_cur_index]) ; |
|
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changeset
|
5964 pthread_cond_init (&_cond[_cur_index], isAbsolute ? NULL : os::Linux::condAttr()); |
| 0 | 5965 } |
| 5966 } | |
|
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|
5967 _cur_index = -1; |
| 0 | 5968 assert_status(status == 0 || status == EINTR || |
| 5969 status == ETIME || status == ETIMEDOUT, | |
| 5970 status, "cond_timedwait"); | |
| 5971 | |
| 5972 #ifdef ASSERT | |
| 5973 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); | |
| 5974 #endif | |
| 5975 | |
| 5976 _counter = 0 ; | |
| 5977 status = pthread_mutex_unlock(_mutex) ; | |
| 5978 assert_status(status == 0, status, "invariant") ; | |
|
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|
5979 // Paranoia to ensure our locked and lock-free paths interact |
|
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changeset
|
5980 // correctly with each other and Java-level accesses. |
|
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changeset
|
5981 OrderAccess::fence(); |
|
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changeset
|
5982 |
| 0 | 5983 // If externally suspended while waiting, re-suspend |
| 5984 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 5985 jt->java_suspend_self(); | |
| 5986 } | |
| 5987 } | |
| 5988 | |
| 5989 void Parker::unpark() { | |
| 5990 int s, status ; | |
| 5991 status = pthread_mutex_lock(_mutex); | |
| 5992 assert (status == 0, "invariant") ; | |
| 5993 s = _counter; | |
| 5994 _counter = 1; | |
| 5995 if (s < 1) { | |
|
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|
5996 // thread might be parked |
|
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changeset
|
5997 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
|
5998 // 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
|
5999 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
|
6000 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
|
6001 assert (status == 0, "invariant"); |
| 0 | 6002 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
|
6003 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
|
6004 } else { |
| 0 | 6005 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
|
6006 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
|
6007 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
|
6008 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
|
6009 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
6010 } 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
|
6011 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
|
6012 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
|
6013 } |
| 0 | 6014 } else { |
| 6015 pthread_mutex_unlock(_mutex); | |
| 6016 assert (status == 0, "invariant") ; | |
| 6017 } | |
| 6018 } | |
| 6019 | |
| 6020 | |
| 6021 extern char** environ; | |
| 6022 | |
| 6023 #ifndef __NR_fork | |
| 6024 #define __NR_fork IA32_ONLY(2) IA64_ONLY(not defined) AMD64_ONLY(57) | |
| 6025 #endif | |
| 6026 | |
| 6027 #ifndef __NR_execve | |
| 6028 #define __NR_execve IA32_ONLY(11) IA64_ONLY(1033) AMD64_ONLY(59) | |
| 6029 #endif | |
| 6030 | |
| 6031 // Run the specified command in a separate process. Return its exit value, | |
| 6032 // or -1 on failure (e.g. can't fork a new process). | |
| 6033 // Unlike system(), this function can be called from signal handler. It | |
| 6034 // doesn't block SIGINT et al. | |
| 6035 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
|
6036 const char * argv[4] = {"sh", "-c", cmd, NULL}; |
| 0 | 6037 |
| 6038 // fork() in LinuxThreads/NPTL is not async-safe. It needs to run | |
| 6039 // pthread_atfork handlers and reset pthread library. All we need is a | |
| 6040 // separate process to execve. Make a direct syscall to fork process. | |
| 6041 // On IA64 there's no fork syscall, we have to use fork() and hope for | |
| 6042 // the best... | |
| 6043 pid_t pid = NOT_IA64(syscall(__NR_fork);) | |
| 6044 IA64_ONLY(fork();) | |
| 6045 | |
| 6046 if (pid < 0) { | |
| 6047 // fork failed | |
| 6048 return -1; | |
| 6049 | |
| 6050 } else if (pid == 0) { | |
| 6051 // child process | |
| 6052 | |
| 6053 // execve() in LinuxThreads will call pthread_kill_other_threads_np() | |
| 6054 // first to kill every thread on the thread list. Because this list is | |
| 6055 // not reset by fork() (see notes above), execve() will instead kill | |
| 6056 // every thread in the parent process. We know this is the only thread | |
| 6057 // in the new process, so make a system call directly. | |
| 6058 // IA64 should use normal execve() from glibc to match the glibc fork() | |
| 6059 // above. | |
| 6060 NOT_IA64(syscall(__NR_execve, "/bin/sh", argv, environ);) | |
|
199
f139919897d2
6681796: hotspot build failure on gcc 4.2.x (ubuntu 8.04) w/ openjdk 6
xlu
parents:
141
diff
changeset
|
6061 IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);) |
| 0 | 6062 |
| 6063 // execve failed | |
| 6064 _exit(-1); | |
| 6065 | |
| 6066 } else { | |
| 6067 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
| 6068 // care about the actual exit code, for now. | |
| 6069 | |
| 6070 int status; | |
| 6071 | |
| 6072 // Wait for the child process to exit. This returns immediately if | |
| 6073 // the child has already exited. */ | |
| 6074 while (waitpid(pid, &status, 0) < 0) { | |
| 6075 switch (errno) { | |
| 6076 case ECHILD: return 0; | |
| 6077 case EINTR: break; | |
| 6078 default: return -1; | |
| 6079 } | |
| 6080 } | |
| 6081 | |
| 6082 if (WIFEXITED(status)) { | |
| 6083 // The child exited normally; get its exit code. | |
| 6084 return WEXITSTATUS(status); | |
| 6085 } else if (WIFSIGNALED(status)) { | |
| 6086 // The child exited because of a signal | |
| 6087 // The best value to return is 0x80 + signal number, | |
| 6088 // because that is what all Unix shells do, and because | |
| 6089 // it allows callers to distinguish between process exit and | |
| 6090 // process death by signal. | |
| 6091 return 0x80 + WTERMSIG(status); | |
| 6092 } else { | |
| 6093 // Unknown exit code; pass it through | |
| 6094 return status; | |
| 6095 } | |
| 6096 } | |
| 6097 } | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6098 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6099 // is_headless_jre() |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6100 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6101 // 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
|
6102 // 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
|
6103 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6104 // 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
|
6105 // 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
|
6106 // |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6107 bool os::is_headless_jre() { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6108 struct stat statbuf; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6109 char buf[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6110 char libmawtpath[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6111 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
|
6112 const char *new_xawtstr = "/libawt_xawt.so"; |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6113 char *p; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6114 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6115 // Get path to libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6116 os::jvm_path(buf, sizeof(buf)); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6117 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6118 // Get rid of libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6119 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6120 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6121 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6122 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6123 // Get rid of client or server |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6124 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6125 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6126 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6127 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6128 // check xawt/libmawt.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6129 strcpy(libmawtpath, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6130 strcat(libmawtpath, xawtstr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6131 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6132 |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6133 // check libawt_xawt.so |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6134 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
|
6135 strcat(libmawtpath, new_xawtstr); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6136 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6137 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6138 return true; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6139 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6140 |
|
6200
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6141 // Get the default path to the core file |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6142 // Returns the length of the string |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6143 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
|
6144 const char* p = get_current_directory(buffer, bufferSize); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6145 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6146 if (p == NULL) { |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6147 assert(p != NULL, "failed to get current directory"); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6148 return 0; |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6149 } |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6150 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6151 return strlen(buffer); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6152 } |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6153 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6154 #ifdef JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6155 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6156 // A thread to watch the '/dev/mem_notify' device, which will tell us when the OS is running low on memory. |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6157 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6158 MemNotifyThread* MemNotifyThread::_memnotify_thread = NULL; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6159 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6160 // ctor |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6161 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6162 MemNotifyThread::MemNotifyThread(int fd): Thread() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6163 assert(memnotify_thread() == NULL, "we can only allocate one MemNotifyThread"); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6164 _fd = fd; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6165 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6166 if (os::create_thread(this, os::os_thread)) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6167 _memnotify_thread = this; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6168 os::set_priority(this, NearMaxPriority); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6169 os::start_thread(this); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6170 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6171 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6172 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6173 // Where all the work gets done |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6174 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6175 void MemNotifyThread::run() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6176 assert(this == memnotify_thread(), "expected the singleton MemNotifyThread"); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6177 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6178 // Set up the select arguments |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6179 fd_set rfds; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6180 if (_fd != -1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6181 FD_ZERO(&rfds); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6182 FD_SET(_fd, &rfds); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6183 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6184 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6185 // Now wait for the mem_notify device to wake up |
|
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7061212: use o/s low memory notification in embedded builds
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diff
changeset
|
6186 while (1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
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diff
changeset
|
6187 // Wait for the mem_notify device to signal us.. |
|
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7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6188 int rc = select(_fd+1, _fd != -1 ? &rfds : NULL, NULL, NULL, NULL); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6189 if (rc == -1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6190 perror("select!\n"); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6191 break; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6192 } else if (rc) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6193 //ssize_t free_before = os::available_memory(); |
|
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7061212: use o/s low memory notification in embedded builds
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diff
changeset
|
6194 //tty->print ("Notified: Free: %dK \n",os::available_memory()/1024); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
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diff
changeset
|
6195 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6196 // The kernel is telling us there is not much memory left... |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6197 // try to do something about that |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6198 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6199 // If we are not already in a GC, try one. |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6200 if (!Universe::heap()->is_gc_active()) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6201 Universe::heap()->collect(GCCause::_allocation_failure); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6202 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6203 //ssize_t free_after = os::available_memory(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
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diff
changeset
|
6204 //tty->print ("Post-Notify: Free: %dK\n",free_after/1024); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6205 //tty->print ("GC freed: %dK\n", (free_after - free_before)/1024); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
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changeset
|
6206 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
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parents:
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diff
changeset
|
6207 // We might want to do something like the following if we find the GC's are not helping... |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6208 // Universe::heap()->size_policy()->set_gc_time_limit_exceeded(true); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6209 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6210 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6211 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6212 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6213 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
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parents:
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diff
changeset
|
6214 // See if the /dev/mem_notify device exists, and if so, start a thread to monitor it. |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6215 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6216 void MemNotifyThread::start() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6217 int fd; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6218 fd = open ("/dev/mem_notify", O_RDONLY, 0); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6219 if (fd < 0) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6220 return; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6221 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6222 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6223 if (memnotify_thread() == NULL) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6224 new MemNotifyThread(fd); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6225 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6226 } |
| 10405 | 6227 |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
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diff
changeset
|
6228 #endif // JAVASE_EMBEDDED |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6229 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6230 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
6231 /////////////// Unit tests /////////////// |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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parents:
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diff
changeset
|
6232 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
6233 #ifndef PRODUCT |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6234 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6235 #define test_log(...) \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6236 do {\ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6237 if (VerboseInternalVMTests) { \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6238 tty->print_cr(__VA_ARGS__); \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6239 tty->flush(); \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6240 }\ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6241 } while (false) |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6242 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6243 class TestReserveMemorySpecial : AllStatic { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6244 public: |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6245 static void small_page_write(void* addr, size_t size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6246 size_t page_size = os::vm_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6247 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6248 char* end = (char*)addr + size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6249 for (char* p = (char*)addr; p < end; p += page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6250 *p = 1; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6251 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6252 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6253 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6254 static void test_reserve_memory_special_huge_tlbfs_only(size_t size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6255 if (!UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6256 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6257 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6258 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6259 test_log("test_reserve_memory_special_huge_tlbfs_only(" SIZE_FORMAT ")", size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6260 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6261 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_only(size, NULL, false); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6262 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6263 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6264 small_page_write(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6265 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6266 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6267 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6268 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6269 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6270 static void test_reserve_memory_special_huge_tlbfs_only() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6271 if (!UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6272 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6273 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6274 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6275 size_t lp = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6276 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6277 for (size_t size = lp; size <= lp * 10; size += lp) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6278 test_reserve_memory_special_huge_tlbfs_only(size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6279 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6280 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6281 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6282 static void test_reserve_memory_special_huge_tlbfs_mixed(size_t size, size_t alignment) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6283 if (!UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6284 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6285 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6286 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6287 test_log("test_reserve_memory_special_huge_tlbfs_mixed(" SIZE_FORMAT ", " SIZE_FORMAT ")", |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6288 size, alignment); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6289 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6290 assert(size >= os::large_page_size(), "Incorrect input to test"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6291 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6292 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, NULL, false); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6293 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6294 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6295 small_page_write(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6296 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6297 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6298 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6299 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6300 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6301 static void test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(size_t size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6302 size_t lp = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6303 size_t ag = os::vm_allocation_granularity(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6304 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6305 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6306 test_reserve_memory_special_huge_tlbfs_mixed(size, alignment); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6307 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6308 } |
|
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6309 |
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6310 static void test_reserve_memory_special_huge_tlbfs_mixed() { |
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6311 size_t lp = os::large_page_size(); |
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6312 size_t ag = os::vm_allocation_granularity(); |
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6313 |
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6314 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp); |
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6315 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp + ag); |
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6316 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp + lp / 2); |
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6317 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2); |
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6318 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 + ag); |
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6319 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 - ag); |
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6320 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 + lp / 2); |
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6321 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 10); |
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6322 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 10 + lp / 2); |
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6323 } |
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|
6324 |
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6325 static void test_reserve_memory_special_huge_tlbfs() { |
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6326 if (!UseHugeTLBFS) { |
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6327 return; |
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6328 } |
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|
6329 |
|
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|
6330 test_reserve_memory_special_huge_tlbfs_only(); |
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6331 test_reserve_memory_special_huge_tlbfs_mixed(); |
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6332 } |
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|
6333 |
|
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6334 static void test_reserve_memory_special_shm(size_t size, size_t alignment) { |
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6335 if (!UseSHM) { |
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|
6336 return; |
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|
6337 } |
|
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|
6338 |
|
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|
6339 test_log("test_reserve_memory_special_shm(" SIZE_FORMAT ", " SIZE_FORMAT ")", size, alignment); |
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|
6340 |
|
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|
6341 char* addr = os::Linux::reserve_memory_special_shm(size, alignment, NULL, false); |
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|
6342 |
|
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|
6343 if (addr != NULL) { |
|
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6344 assert(is_ptr_aligned(addr, alignment), "Check"); |
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6345 assert(is_ptr_aligned(addr, os::large_page_size()), "Check"); |
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|
6346 |
|
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|
6347 small_page_write(addr, size); |
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|
6348 |
|
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|
6349 os::Linux::release_memory_special_shm(addr, size); |
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6350 } |
|
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|
6351 } |
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|
6352 |
|
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|
6353 static void test_reserve_memory_special_shm() { |
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6354 size_t lp = os::large_page_size(); |
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6355 size_t ag = os::vm_allocation_granularity(); |
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6356 |
|
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6357 for (size_t size = ag; size < lp * 3; size += ag) { |
|
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6358 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
|
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|
6359 test_reserve_memory_special_shm(size, alignment); |
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|
6360 } |
|
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|
6361 } |
|
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|
6362 } |
|
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|
6363 |
|
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|
6364 static void test() { |
|
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|
6365 test_reserve_memory_special_huge_tlbfs(); |
|
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|
6366 test_reserve_memory_special_shm(); |
|
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|
6367 } |
|
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|
6368 }; |
|
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|
6369 |
|
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|
6370 void TestReserveMemorySpecial_test() { |
|
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|
6371 TestReserveMemorySpecial::test(); |
|
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|
6372 } |
|
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|
6373 |
|
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6374 #endif |