Mercurial > hg > graal-jvmci-8
annotate src/os/linux/vm/os_linux.cpp @ 12997:e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
Summary: Use HR timer when available for os::elapsed_counter() on linux/bsd. Add a new counter for the JVM uptime.
Reviewed-by: dholmes, sla
| author | jbachorik |
|---|---|
| date | Fri, 25 Oct 2013 09:07:58 +0200 |
| parents | aa6f2ea19d8f |
| children | 096c224171c4 c250880a6673 2b8e28fdf503 5656140324ed |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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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 | |
| 112 // for timer info max values which include all bits | |
| 113 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) | |
| 114 | |
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115 #define LARGEPAGES_BIT (1 << 6) |
| 0 | 116 //////////////////////////////////////////////////////////////////////////////// |
| 117 // global variables | |
| 118 julong os::Linux::_physical_memory = 0; | |
| 119 | |
| 120 address os::Linux::_initial_thread_stack_bottom = NULL; | |
| 121 uintptr_t os::Linux::_initial_thread_stack_size = 0; | |
| 122 | |
| 123 int (*os::Linux::_clock_gettime)(clockid_t, struct timespec *) = NULL; | |
| 124 int (*os::Linux::_pthread_getcpuclockid)(pthread_t, clockid_t *) = NULL; | |
| 125 Mutex* os::Linux::_createThread_lock = NULL; | |
| 126 pthread_t os::Linux::_main_thread; | |
| 127 int os::Linux::_page_size = -1; | |
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128 const int os::Linux::_vm_default_page_size = (8 * K); |
| 0 | 129 bool os::Linux::_is_floating_stack = false; |
| 130 bool os::Linux::_is_NPTL = false; | |
| 131 bool os::Linux::_supports_fast_thread_cpu_time = false; | |
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132 const char * os::Linux::_glibc_version = NULL; |
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133 const char * os::Linux::_libpthread_version = NULL; |
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134 pthread_condattr_t os::Linux::_condattr[1]; |
| 0 | 135 |
| 136 static jlong initial_time_count=0; | |
| 137 | |
| 138 static int clock_tics_per_sec = 100; | |
| 139 | |
| 140 // For diagnostics to print a message once. see run_periodic_checks | |
| 141 static sigset_t check_signal_done; | |
| 142 static bool check_signals = true;; | |
| 143 | |
| 144 static pid_t _initial_pid = 0; | |
| 145 | |
| 146 /* Signal number used to suspend/resume a thread */ | |
| 147 | |
| 148 /* do not use any signal number less than SIGSEGV, see 4355769 */ | |
| 149 static int SR_signum = SIGUSR2; | |
| 150 sigset_t SR_sigset; | |
| 151 | |
| 242 | 152 /* Used to protect dlsym() calls */ |
| 153 static pthread_mutex_t dl_mutex; | |
| 154 | |
| 10405 | 155 // Declarations |
| 156 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); | |
| 157 | |
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158 #ifdef JAVASE_EMBEDDED |
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159 class MemNotifyThread: public Thread { |
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160 friend class VMStructs; |
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161 public: |
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162 virtual void run(); |
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163 |
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164 private: |
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165 static MemNotifyThread* _memnotify_thread; |
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166 int _fd; |
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167 |
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168 public: |
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169 |
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170 // Constructor |
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171 MemNotifyThread(int fd); |
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172 |
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173 // Tester |
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174 bool is_memnotify_thread() const { return true; } |
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175 |
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176 // Printing |
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177 char* name() const { return (char*)"Linux MemNotify Thread"; } |
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178 |
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179 // Returns the single instance of the MemNotifyThread |
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180 static MemNotifyThread* memnotify_thread() { return _memnotify_thread; } |
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181 |
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182 // Create and start the single instance of MemNotifyThread |
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183 static void start(); |
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184 }; |
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185 #endif // JAVASE_EMBEDDED |
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186 |
| 0 | 187 // utility functions |
| 188 | |
| 189 static int SR_initialize(); | |
| 190 | |
| 191 julong os::available_memory() { | |
| 192 return Linux::available_memory(); | |
| 193 } | |
| 194 | |
| 195 julong os::Linux::available_memory() { | |
| 196 // values in struct sysinfo are "unsigned long" | |
| 197 struct sysinfo si; | |
| 198 sysinfo(&si); | |
| 199 | |
| 200 return (julong)si.freeram * si.mem_unit; | |
| 201 } | |
| 202 | |
| 203 julong os::physical_memory() { | |
| 204 return Linux::physical_memory(); | |
| 205 } | |
| 206 | |
| 207 //////////////////////////////////////////////////////////////////////////////// | |
| 208 // environment support | |
| 209 | |
| 210 bool os::getenv(const char* name, char* buf, int len) { | |
| 211 const char* val = ::getenv(name); | |
| 212 if (val != NULL && strlen(val) < (size_t)len) { | |
| 213 strcpy(buf, val); | |
| 214 return true; | |
| 215 } | |
| 216 if (len > 0) buf[0] = 0; // return a null string | |
| 217 return false; | |
| 218 } | |
| 219 | |
| 220 | |
| 221 // Return true if user is running as root. | |
| 222 | |
| 223 bool os::have_special_privileges() { | |
| 224 static bool init = false; | |
| 225 static bool privileges = false; | |
| 226 if (!init) { | |
| 227 privileges = (getuid() != geteuid()) || (getgid() != getegid()); | |
| 228 init = true; | |
| 229 } | |
| 230 return privileges; | |
| 231 } | |
| 232 | |
| 233 | |
| 234 #ifndef SYS_gettid | |
| 235 // i386: 224, ia64: 1105, amd64: 186, sparc 143 | |
| 236 #ifdef __ia64__ | |
| 237 #define SYS_gettid 1105 | |
| 238 #elif __i386__ | |
| 239 #define SYS_gettid 224 | |
| 240 #elif __amd64__ | |
| 241 #define SYS_gettid 186 | |
| 242 #elif __sparc__ | |
| 243 #define SYS_gettid 143 | |
| 244 #else | |
| 245 #error define gettid for the arch | |
| 246 #endif | |
| 247 #endif | |
| 248 | |
| 249 // Cpu architecture string | |
| 1010 | 250 #if defined(ZERO) |
| 251 static char cpu_arch[] = ZERO_LIBARCH; | |
| 252 #elif defined(IA64) | |
| 0 | 253 static char cpu_arch[] = "ia64"; |
| 254 #elif defined(IA32) | |
| 255 static char cpu_arch[] = "i386"; | |
| 256 #elif defined(AMD64) | |
| 257 static char cpu_arch[] = "amd64"; | |
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258 #elif defined(ARM) |
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259 static char cpu_arch[] = "arm"; |
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260 #elif defined(PPC) |
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261 static char cpu_arch[] = "ppc"; |
| 0 | 262 #elif defined(SPARC) |
| 263 # ifdef _LP64 | |
| 264 static char cpu_arch[] = "sparcv9"; | |
| 265 # else | |
| 266 static char cpu_arch[] = "sparc"; | |
| 267 # endif | |
| 268 #else | |
| 269 #error Add appropriate cpu_arch setting | |
| 270 #endif | |
| 271 | |
| 272 | |
| 273 // pid_t gettid() | |
| 274 // | |
| 275 // Returns the kernel thread id of the currently running thread. Kernel | |
| 276 // thread id is used to access /proc. | |
| 277 // | |
| 278 // (Note that getpid() on LinuxThreads returns kernel thread id too; but | |
| 279 // on NPTL, it returns the same pid for all threads, as required by POSIX.) | |
| 280 // | |
| 281 pid_t os::Linux::gettid() { | |
| 282 int rslt = syscall(SYS_gettid); | |
| 283 if (rslt == -1) { | |
| 284 // old kernel, no NPTL support | |
| 285 return getpid(); | |
| 286 } else { | |
| 287 return (pid_t)rslt; | |
| 288 } | |
| 289 } | |
| 290 | |
| 291 // Most versions of linux have a bug where the number of processors are | |
| 292 // determined by looking at the /proc file system. In a chroot environment, | |
| 293 // the system call returns 1. This causes the VM to act as if it is | |
| 294 // a single processor and elide locking (see is_MP() call). | |
| 295 static bool unsafe_chroot_detected = false; | |
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296 static const char *unstable_chroot_error = "/proc file system not found.\n" |
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297 "Java may be unstable running multithreaded in a chroot " |
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298 "environment on Linux when /proc filesystem is not mounted."; |
| 0 | 299 |
| 300 void os::Linux::initialize_system_info() { | |
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301 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); |
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302 if (processor_count() == 1) { |
| 0 | 303 pid_t pid = os::Linux::gettid(); |
| 304 char fname[32]; | |
| 305 jio_snprintf(fname, sizeof(fname), "/proc/%d", pid); | |
| 306 FILE *fp = fopen(fname, "r"); | |
| 307 if (fp == NULL) { | |
| 308 unsafe_chroot_detected = true; | |
| 309 } else { | |
| 310 fclose(fp); | |
| 311 } | |
| 312 } | |
| 313 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); | |
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314 assert(processor_count() > 0, "linux error"); |
| 0 | 315 } |
| 316 | |
| 317 void os::init_system_properties_values() { | |
| 318 // char arch[12]; | |
| 319 // sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); | |
| 320 | |
| 321 // The next steps are taken in the product version: | |
| 322 // | |
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323 // Obtain the JAVA_HOME value from the location of libjvm.so. |
| 0 | 324 // This library should be located at: |
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325 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
| 0 | 326 // |
| 327 // If "/jre/lib/" appears at the right place in the path, then we | |
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328 // assume libjvm.so is installed in a JDK and we use this path. |
| 0 | 329 // |
| 330 // Otherwise exit with message: "Could not create the Java virtual machine." | |
| 331 // | |
| 332 // The following extra steps are taken in the debugging version: | |
| 333 // | |
| 334 // If "/jre/lib/" does NOT appear at the right place in the path | |
| 335 // instead of exit check for $JAVA_HOME environment variable. | |
| 336 // | |
| 337 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, | |
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338 // then we append a fake suffix "hotspot/libjvm.so" to this path so |
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339 // it looks like libjvm.so is installed there |
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340 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
| 0 | 341 // |
| 342 // Otherwise exit. | |
| 343 // | |
| 344 // Important note: if the location of libjvm.so changes this | |
| 345 // code needs to be changed accordingly. | |
| 346 | |
| 347 // The next few definitions allow the code to be verbatim: | |
| 6197 | 348 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) |
| 0 | 349 #define getenv(n) ::getenv(n) |
| 350 | |
| 351 /* | |
| 352 * See ld(1): | |
| 353 * The linker uses the following search paths to locate required | |
| 354 * shared libraries: | |
| 355 * 1: ... | |
| 356 * ... | |
| 357 * 7: The default directories, normally /lib and /usr/lib. | |
| 358 */ | |
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359 #if defined(AMD64) || defined(_LP64) && (defined(SPARC) || defined(PPC) || defined(S390)) |
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360 #define DEFAULT_LIBPATH "/usr/lib64:/lib64:/lib:/usr/lib" |
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361 #else |
| 0 | 362 #define DEFAULT_LIBPATH "/lib:/usr/lib" |
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363 #endif |
| 0 | 364 |
| 365 #define EXTENSIONS_DIR "/lib/ext" | |
| 366 #define ENDORSED_DIR "/lib/endorsed" | |
| 367 #define REG_DIR "/usr/java/packages" | |
| 368 | |
| 369 { | |
| 370 /* sysclasspath, java_home, dll_dir */ | |
| 371 { | |
| 372 char *home_path; | |
| 373 char *dll_path; | |
| 374 char *pslash; | |
| 375 char buf[MAXPATHLEN]; | |
| 376 os::jvm_path(buf, sizeof(buf)); | |
| 377 | |
| 378 // Found the full path to libjvm.so. | |
| 379 // Now cut the path to <java_home>/jre if we can. | |
| 380 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ | |
| 381 pslash = strrchr(buf, '/'); | |
| 382 if (pslash != NULL) | |
| 383 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ | |
| 384 dll_path = malloc(strlen(buf) + 1); | |
| 385 if (dll_path == NULL) | |
| 386 return; | |
| 387 strcpy(dll_path, buf); | |
| 388 Arguments::set_dll_dir(dll_path); | |
| 389 | |
| 390 if (pslash != NULL) { | |
| 391 pslash = strrchr(buf, '/'); | |
| 392 if (pslash != NULL) { | |
| 393 *pslash = '\0'; /* get rid of /<arch> */ | |
| 394 pslash = strrchr(buf, '/'); | |
| 395 if (pslash != NULL) | |
| 396 *pslash = '\0'; /* get rid of /lib */ | |
| 397 } | |
| 398 } | |
| 399 | |
| 400 home_path = malloc(strlen(buf) + 1); | |
| 401 if (home_path == NULL) | |
| 402 return; | |
| 403 strcpy(home_path, buf); | |
| 404 Arguments::set_java_home(home_path); | |
| 405 | |
| 406 if (!set_boot_path('/', ':')) | |
| 407 return; | |
| 408 } | |
| 409 | |
| 410 /* | |
| 411 * Where to look for native libraries | |
| 412 * | |
| 413 * Note: Due to a legacy implementation, most of the library path | |
| 414 * is set in the launcher. This was to accomodate linking restrictions | |
| 415 * on legacy Linux implementations (which are no longer supported). | |
| 416 * Eventually, all the library path setting will be done here. | |
| 417 * | |
| 418 * However, to prevent the proliferation of improperly built native | |
| 419 * libraries, the new path component /usr/java/packages is added here. | |
| 420 * Eventually, all the library path setting will be done here. | |
| 421 */ | |
| 422 { | |
| 423 char *ld_library_path; | |
| 424 | |
| 425 /* | |
| 426 * Construct the invariant part of ld_library_path. Note that the | |
| 427 * space for the colon and the trailing null are provided by the | |
| 428 * nulls included by the sizeof operator (so actually we allocate | |
| 429 * a byte more than necessary). | |
| 430 */ | |
| 431 ld_library_path = (char *) malloc(sizeof(REG_DIR) + sizeof("/lib/") + | |
| 432 strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH)); | |
| 433 sprintf(ld_library_path, REG_DIR "/lib/%s:" DEFAULT_LIBPATH, cpu_arch); | |
| 434 | |
| 435 /* | |
| 436 * Get the user setting of LD_LIBRARY_PATH, and prepended it. It | |
| 437 * should always exist (until the legacy problem cited above is | |
| 438 * addressed). | |
| 439 */ | |
| 440 char *v = getenv("LD_LIBRARY_PATH"); | |
| 441 if (v != NULL) { | |
| 442 char *t = ld_library_path; | |
| 443 /* That's +1 for the colon and +1 for the trailing '\0' */ | |
| 444 ld_library_path = (char *) malloc(strlen(v) + 1 + strlen(t) + 1); | |
| 445 sprintf(ld_library_path, "%s:%s", v, t); | |
| 446 } | |
| 447 Arguments::set_library_path(ld_library_path); | |
| 448 } | |
| 449 | |
| 450 /* | |
| 451 * Extensions directories. | |
| 452 * | |
| 453 * Note that the space for the colon and the trailing null are provided | |
| 454 * by the nulls included by the sizeof operator (so actually one byte more | |
| 455 * than necessary is allocated). | |
| 456 */ | |
| 457 { | |
| 458 char *buf = malloc(strlen(Arguments::get_java_home()) + | |
| 459 sizeof(EXTENSIONS_DIR) + sizeof(REG_DIR) + sizeof(EXTENSIONS_DIR)); | |
| 460 sprintf(buf, "%s" EXTENSIONS_DIR ":" REG_DIR EXTENSIONS_DIR, | |
| 461 Arguments::get_java_home()); | |
| 462 Arguments::set_ext_dirs(buf); | |
| 463 } | |
| 464 | |
| 465 /* Endorsed standards default directory. */ | |
| 466 { | |
| 467 char * buf; | |
| 468 buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); | |
| 469 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); | |
| 470 Arguments::set_endorsed_dirs(buf); | |
| 471 } | |
| 472 } | |
| 473 | |
| 474 #undef malloc | |
| 475 #undef getenv | |
| 476 #undef EXTENSIONS_DIR | |
| 477 #undef ENDORSED_DIR | |
| 478 | |
| 479 // Done | |
| 480 return; | |
| 481 } | |
| 482 | |
| 483 //////////////////////////////////////////////////////////////////////////////// | |
| 484 // breakpoint support | |
| 485 | |
| 486 void os::breakpoint() { | |
| 487 BREAKPOINT; | |
| 488 } | |
| 489 | |
| 490 extern "C" void breakpoint() { | |
| 491 // use debugger to set breakpoint here | |
| 492 } | |
| 493 | |
| 494 //////////////////////////////////////////////////////////////////////////////// | |
| 495 // signal support | |
| 496 | |
| 497 debug_only(static bool signal_sets_initialized = false); | |
| 498 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; | |
| 499 | |
| 500 bool os::Linux::is_sig_ignored(int sig) { | |
| 501 struct sigaction oact; | |
| 502 sigaction(sig, (struct sigaction*)NULL, &oact); | |
| 503 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) | |
| 504 : CAST_FROM_FN_PTR(void*, oact.sa_handler); | |
| 505 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) | |
| 506 return true; | |
| 507 else | |
| 508 return false; | |
| 509 } | |
| 510 | |
| 511 void os::Linux::signal_sets_init() { | |
| 512 // Should also have an assertion stating we are still single-threaded. | |
| 513 assert(!signal_sets_initialized, "Already initialized"); | |
| 514 // Fill in signals that are necessarily unblocked for all threads in | |
| 515 // the VM. Currently, we unblock the following signals: | |
| 516 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden | |
| 517 // by -Xrs (=ReduceSignalUsage)); | |
| 518 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all | |
| 519 // other threads. The "ReduceSignalUsage" boolean tells us not to alter | |
| 520 // the dispositions or masks wrt these signals. | |
| 521 // Programs embedding the VM that want to use the above signals for their | |
| 522 // own purposes must, at this time, use the "-Xrs" option to prevent | |
| 523 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. | |
| 524 // (See bug 4345157, and other related bugs). | |
| 525 // In reality, though, unblocking these signals is really a nop, since | |
| 526 // these signals are not blocked by default. | |
| 527 sigemptyset(&unblocked_sigs); | |
| 528 sigemptyset(&allowdebug_blocked_sigs); | |
| 529 sigaddset(&unblocked_sigs, SIGILL); | |
| 530 sigaddset(&unblocked_sigs, SIGSEGV); | |
| 531 sigaddset(&unblocked_sigs, SIGBUS); | |
| 532 sigaddset(&unblocked_sigs, SIGFPE); | |
| 533 sigaddset(&unblocked_sigs, SR_signum); | |
| 534 | |
| 535 if (!ReduceSignalUsage) { | |
| 536 if (!os::Linux::is_sig_ignored(SHUTDOWN1_SIGNAL)) { | |
| 537 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); | |
| 538 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); | |
| 539 } | |
| 540 if (!os::Linux::is_sig_ignored(SHUTDOWN2_SIGNAL)) { | |
| 541 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); | |
| 542 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); | |
| 543 } | |
| 544 if (!os::Linux::is_sig_ignored(SHUTDOWN3_SIGNAL)) { | |
| 545 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); | |
| 546 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); | |
| 547 } | |
| 548 } | |
| 549 // Fill in signals that are blocked by all but the VM thread. | |
| 550 sigemptyset(&vm_sigs); | |
| 551 if (!ReduceSignalUsage) | |
| 552 sigaddset(&vm_sigs, BREAK_SIGNAL); | |
| 553 debug_only(signal_sets_initialized = true); | |
| 554 | |
| 555 } | |
| 556 | |
| 557 // These are signals that are unblocked while a thread is running Java. | |
| 558 // (For some reason, they get blocked by default.) | |
| 559 sigset_t* os::Linux::unblocked_signals() { | |
| 560 assert(signal_sets_initialized, "Not initialized"); | |
| 561 return &unblocked_sigs; | |
| 562 } | |
| 563 | |
| 564 // These are the signals that are blocked while a (non-VM) thread is | |
| 565 // running Java. Only the VM thread handles these signals. | |
| 566 sigset_t* os::Linux::vm_signals() { | |
| 567 assert(signal_sets_initialized, "Not initialized"); | |
| 568 return &vm_sigs; | |
| 569 } | |
| 570 | |
| 571 // These are signals that are blocked during cond_wait to allow debugger in | |
| 572 sigset_t* os::Linux::allowdebug_blocked_signals() { | |
| 573 assert(signal_sets_initialized, "Not initialized"); | |
| 574 return &allowdebug_blocked_sigs; | |
| 575 } | |
| 576 | |
| 577 void os::Linux::hotspot_sigmask(Thread* thread) { | |
| 578 | |
| 579 //Save caller's signal mask before setting VM signal mask | |
| 580 sigset_t caller_sigmask; | |
| 581 pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); | |
| 582 | |
| 583 OSThread* osthread = thread->osthread(); | |
| 584 osthread->set_caller_sigmask(caller_sigmask); | |
| 585 | |
| 586 pthread_sigmask(SIG_UNBLOCK, os::Linux::unblocked_signals(), NULL); | |
| 587 | |
| 588 if (!ReduceSignalUsage) { | |
| 589 if (thread->is_VM_thread()) { | |
| 590 // Only the VM thread handles BREAK_SIGNAL ... | |
| 591 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); | |
| 592 } else { | |
| 593 // ... all other threads block BREAK_SIGNAL | |
| 594 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); | |
| 595 } | |
| 596 } | |
| 597 } | |
| 598 | |
| 599 ////////////////////////////////////////////////////////////////////////////// | |
| 600 // detecting pthread library | |
| 601 | |
| 602 void os::Linux::libpthread_init() { | |
| 603 // Save glibc and pthread version strings. Note that _CS_GNU_LIBC_VERSION | |
| 604 // and _CS_GNU_LIBPTHREAD_VERSION are supported in glibc >= 2.3.2. Use a | |
| 605 // generic name for earlier versions. | |
| 606 // Define macros here so we can build HotSpot on old systems. | |
| 607 # ifndef _CS_GNU_LIBC_VERSION | |
| 608 # define _CS_GNU_LIBC_VERSION 2 | |
| 609 # endif | |
| 610 # ifndef _CS_GNU_LIBPTHREAD_VERSION | |
| 611 # define _CS_GNU_LIBPTHREAD_VERSION 3 | |
| 612 # endif | |
| 613 | |
| 614 size_t n = confstr(_CS_GNU_LIBC_VERSION, NULL, 0); | |
| 615 if (n > 0) { | |
| 6197 | 616 char *str = (char *)malloc(n, mtInternal); |
| 0 | 617 confstr(_CS_GNU_LIBC_VERSION, str, n); |
| 618 os::Linux::set_glibc_version(str); | |
| 619 } else { | |
| 620 // _CS_GNU_LIBC_VERSION is not supported, try gnu_get_libc_version() | |
| 621 static char _gnu_libc_version[32]; | |
| 622 jio_snprintf(_gnu_libc_version, sizeof(_gnu_libc_version), | |
| 623 "glibc %s %s", gnu_get_libc_version(), gnu_get_libc_release()); | |
| 624 os::Linux::set_glibc_version(_gnu_libc_version); | |
| 625 } | |
| 626 | |
| 627 n = confstr(_CS_GNU_LIBPTHREAD_VERSION, NULL, 0); | |
| 628 if (n > 0) { | |
| 6197 | 629 char *str = (char *)malloc(n, mtInternal); |
| 0 | 630 confstr(_CS_GNU_LIBPTHREAD_VERSION, str, n); |
| 631 // Vanilla RH-9 (glibc 2.3.2) has a bug that confstr() always tells | |
| 632 // us "NPTL-0.29" even we are running with LinuxThreads. Check if this | |
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633 // is the case. LinuxThreads has a hard limit on max number of threads. |
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634 // So sysconf(_SC_THREAD_THREADS_MAX) will return a positive value. |
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635 // On the other hand, NPTL does not have such a limit, sysconf() |
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636 // will return -1 and errno is not changed. Check if it is really NPTL. |
| 0 | 637 if (strcmp(os::Linux::glibc_version(), "glibc 2.3.2") == 0 && |
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638 strstr(str, "NPTL") && |
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639 sysconf(_SC_THREAD_THREADS_MAX) > 0) { |
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640 free(str); |
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641 os::Linux::set_libpthread_version("linuxthreads"); |
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642 } else { |
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643 os::Linux::set_libpthread_version(str); |
| 0 | 644 } |
| 645 } else { | |
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646 // glibc before 2.3.2 only has LinuxThreads. |
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647 os::Linux::set_libpthread_version("linuxthreads"); |
| 0 | 648 } |
| 649 | |
| 650 if (strstr(libpthread_version(), "NPTL")) { | |
| 651 os::Linux::set_is_NPTL(); | |
| 652 } else { | |
| 653 os::Linux::set_is_LinuxThreads(); | |
| 654 } | |
| 655 | |
| 656 // LinuxThreads have two flavors: floating-stack mode, which allows variable | |
| 657 // stack size; and fixed-stack mode. NPTL is always floating-stack. | |
| 658 if (os::Linux::is_NPTL() || os::Linux::supports_variable_stack_size()) { | |
| 659 os::Linux::set_is_floating_stack(); | |
| 660 } | |
| 661 } | |
| 662 | |
| 663 ///////////////////////////////////////////////////////////////////////////// | |
| 664 // thread stack | |
| 665 | |
| 666 // Force Linux kernel to expand current thread stack. If "bottom" is close | |
| 667 // to the stack guard, caller should block all signals. | |
| 668 // | |
| 669 // MAP_GROWSDOWN: | |
| 670 // A special mmap() flag that is used to implement thread stacks. It tells | |
| 671 // kernel that the memory region should extend downwards when needed. This | |
| 672 // allows early versions of LinuxThreads to only mmap the first few pages | |
| 673 // when creating a new thread. Linux kernel will automatically expand thread | |
| 674 // stack as needed (on page faults). | |
| 675 // | |
| 676 // However, because the memory region of a MAP_GROWSDOWN stack can grow on | |
| 677 // demand, if a page fault happens outside an already mapped MAP_GROWSDOWN | |
| 678 // region, it's hard to tell if the fault is due to a legitimate stack | |
| 679 // access or because of reading/writing non-exist memory (e.g. buffer | |
| 680 // overrun). As a rule, if the fault happens below current stack pointer, | |
| 681 // Linux kernel does not expand stack, instead a SIGSEGV is sent to the | |
| 682 // application (see Linux kernel fault.c). | |
| 683 // | |
| 684 // This Linux feature can cause SIGSEGV when VM bangs thread stack for | |
| 685 // stack overflow detection. | |
| 686 // | |
| 687 // Newer version of LinuxThreads (since glibc-2.2, or, RH-7.x) and NPTL do | |
| 688 // not use this flag. However, the stack of initial thread is not created | |
| 689 // by pthread, it is still MAP_GROWSDOWN. Also it's possible (though | |
| 690 // unlikely) that user code can create a thread with MAP_GROWSDOWN stack | |
| 691 // and then attach the thread to JVM. | |
| 692 // | |
| 693 // To get around the problem and allow stack banging on Linux, we need to | |
| 694 // manually expand thread stack after receiving the SIGSEGV. | |
| 695 // | |
| 696 // There are two ways to expand thread stack to address "bottom", we used | |
| 697 // both of them in JVM before 1.5: | |
| 698 // 1. adjust stack pointer first so that it is below "bottom", and then | |
| 699 // touch "bottom" | |
| 700 // 2. mmap() the page in question | |
| 701 // | |
| 702 // Now alternate signal stack is gone, it's harder to use 2. For instance, | |
| 703 // if current sp is already near the lower end of page 101, and we need to | |
| 704 // call mmap() to map page 100, it is possible that part of the mmap() frame | |
| 705 // will be placed in page 100. When page 100 is mapped, it is zero-filled. | |
| 706 // That will destroy the mmap() frame and cause VM to crash. | |
| 707 // | |
| 708 // The following code works by adjusting sp first, then accessing the "bottom" | |
| 709 // page to force a page fault. Linux kernel will then automatically expand the | |
| 710 // stack mapping. | |
| 711 // | |
| 712 // _expand_stack_to() assumes its frame size is less than page size, which | |
| 713 // should always be true if the function is not inlined. | |
| 714 | |
| 715 #if __GNUC__ < 3 // gcc 2.x does not support noinline attribute | |
| 716 #define NOINLINE | |
| 717 #else | |
| 718 #define NOINLINE __attribute__ ((noinline)) | |
| 719 #endif | |
| 720 | |
| 721 static void _expand_stack_to(address bottom) NOINLINE; | |
| 722 | |
| 723 static void _expand_stack_to(address bottom) { | |
| 724 address sp; | |
| 725 size_t size; | |
| 726 volatile char *p; | |
| 727 | |
| 728 // Adjust bottom to point to the largest address within the same page, it | |
| 729 // gives us a one-page buffer if alloca() allocates slightly more memory. | |
| 730 bottom = (address)align_size_down((uintptr_t)bottom, os::Linux::page_size()); | |
| 731 bottom += os::Linux::page_size() - 1; | |
| 732 | |
| 733 // sp might be slightly above current stack pointer; if that's the case, we | |
| 734 // will alloca() a little more space than necessary, which is OK. Don't use | |
| 735 // os::current_stack_pointer(), as its result can be slightly below current | |
| 736 // stack pointer, causing us to not alloca enough to reach "bottom". | |
| 737 sp = (address)&sp; | |
| 738 | |
| 739 if (sp > bottom) { | |
| 740 size = sp - bottom; | |
| 741 p = (volatile char *)alloca(size); | |
| 742 assert(p != NULL && p <= (volatile char *)bottom, "alloca problem?"); | |
| 743 p[0] = '\0'; | |
| 744 } | |
| 745 } | |
| 746 | |
| 747 bool os::Linux::manually_expand_stack(JavaThread * t, address addr) { | |
| 748 assert(t!=NULL, "just checking"); | |
| 749 assert(t->osthread()->expanding_stack(), "expand should be set"); | |
| 750 assert(t->stack_base() != NULL, "stack_base was not initialized"); | |
| 751 | |
| 752 if (addr < t->stack_base() && addr >= t->stack_yellow_zone_base()) { | |
| 753 sigset_t mask_all, old_sigset; | |
| 754 sigfillset(&mask_all); | |
| 755 pthread_sigmask(SIG_SETMASK, &mask_all, &old_sigset); | |
| 756 _expand_stack_to(addr); | |
| 757 pthread_sigmask(SIG_SETMASK, &old_sigset, NULL); | |
| 758 return true; | |
| 759 } | |
| 760 return false; | |
| 761 } | |
| 762 | |
| 763 ////////////////////////////////////////////////////////////////////////////// | |
| 764 // create new thread | |
| 765 | |
| 766 static address highest_vm_reserved_address(); | |
| 767 | |
| 768 // check if it's safe to start a new thread | |
| 769 static bool _thread_safety_check(Thread* thread) { | |
| 770 if (os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack()) { | |
| 771 // Fixed stack LinuxThreads (SuSE Linux/x86, and some versions of Redhat) | |
| 772 // Heap is mmap'ed at lower end of memory space. Thread stacks are | |
| 773 // allocated (MAP_FIXED) from high address space. Every thread stack | |
| 774 // occupies a fixed size slot (usually 2Mbytes, but user can change | |
| 775 // it to other values if they rebuild LinuxThreads). | |
| 776 // | |
| 777 // Problem with MAP_FIXED is that mmap() can still succeed even part of | |
| 778 // the memory region has already been mmap'ed. That means if we have too | |
| 779 // many threads and/or very large heap, eventually thread stack will | |
| 780 // collide with heap. | |
| 781 // | |
| 782 // Here we try to prevent heap/stack collision by comparing current | |
| 783 // stack bottom with the highest address that has been mmap'ed by JVM | |
| 784 // plus a safety margin for memory maps created by native code. | |
| 785 // | |
| 786 // This feature can be disabled by setting ThreadSafetyMargin to 0 | |
| 787 // | |
| 788 if (ThreadSafetyMargin > 0) { | |
| 789 address stack_bottom = os::current_stack_base() - os::current_stack_size(); | |
| 790 | |
| 791 // not safe if our stack extends below the safety margin | |
| 792 return stack_bottom - ThreadSafetyMargin >= highest_vm_reserved_address(); | |
| 793 } else { | |
| 794 return true; | |
| 795 } | |
| 796 } else { | |
| 797 // Floating stack LinuxThreads or NPTL: | |
| 798 // Unlike fixed stack LinuxThreads, thread stacks are not MAP_FIXED. When | |
| 799 // there's not enough space left, pthread_create() will fail. If we come | |
| 800 // here, that means enough space has been reserved for stack. | |
| 801 return true; | |
| 802 } | |
| 803 } | |
| 804 | |
| 805 // Thread start routine for all newly created threads | |
| 806 static void *java_start(Thread *thread) { | |
| 807 // Try to randomize the cache line index of hot stack frames. | |
| 808 // This helps when threads of the same stack traces evict each other's | |
| 809 // cache lines. The threads can be either from the same JVM instance, or | |
| 810 // from different JVM instances. The benefit is especially true for | |
| 811 // processors with hyperthreading technology. | |
| 812 static int counter = 0; | |
| 813 int pid = os::current_process_id(); | |
| 814 alloca(((pid ^ counter++) & 7) * 128); | |
| 815 | |
| 816 ThreadLocalStorage::set_thread(thread); | |
| 817 | |
| 818 OSThread* osthread = thread->osthread(); | |
| 819 Monitor* sync = osthread->startThread_lock(); | |
| 820 | |
| 821 // non floating stack LinuxThreads needs extra check, see above | |
| 822 if (!_thread_safety_check(thread)) { | |
| 823 // notify parent thread | |
| 824 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 825 osthread->set_state(ZOMBIE); | |
| 826 sync->notify_all(); | |
| 827 return NULL; | |
| 828 } | |
| 829 | |
| 830 // thread_id is kernel thread id (similar to Solaris LWP id) | |
| 831 osthread->set_thread_id(os::Linux::gettid()); | |
| 832 | |
| 833 if (UseNUMA) { | |
| 834 int lgrp_id = os::numa_get_group_id(); | |
| 835 if (lgrp_id != -1) { | |
| 836 thread->set_lgrp_id(lgrp_id); | |
| 837 } | |
| 838 } | |
| 839 // initialize signal mask for this thread | |
| 840 os::Linux::hotspot_sigmask(thread); | |
| 841 | |
| 842 // initialize floating point control register | |
| 843 os::Linux::init_thread_fpu_state(); | |
| 844 | |
| 845 // handshaking with parent thread | |
| 846 { | |
| 847 MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); | |
| 848 | |
| 849 // notify parent thread | |
| 850 osthread->set_state(INITIALIZED); | |
| 851 sync->notify_all(); | |
| 852 | |
| 853 // wait until os::start_thread() | |
| 854 while (osthread->get_state() == INITIALIZED) { | |
| 855 sync->wait(Mutex::_no_safepoint_check_flag); | |
| 856 } | |
| 857 } | |
| 858 | |
| 859 // call one more level start routine | |
| 860 thread->run(); | |
| 861 | |
| 862 return 0; | |
| 863 } | |
| 864 | |
| 865 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { | |
| 866 assert(thread->osthread() == NULL, "caller responsible"); | |
| 867 | |
| 868 // Allocate the OSThread object | |
| 869 OSThread* osthread = new OSThread(NULL, NULL); | |
| 870 if (osthread == NULL) { | |
| 871 return false; | |
| 872 } | |
| 873 | |
| 874 // set the correct thread state | |
| 875 osthread->set_thread_type(thr_type); | |
| 876 | |
| 877 // Initial state is ALLOCATED but not INITIALIZED | |
| 878 osthread->set_state(ALLOCATED); | |
| 879 | |
| 880 thread->set_osthread(osthread); | |
| 881 | |
| 882 // init thread attributes | |
| 883 pthread_attr_t attr; | |
| 884 pthread_attr_init(&attr); | |
| 885 pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); | |
| 886 | |
| 887 // stack size | |
| 888 if (os::Linux::supports_variable_stack_size()) { | |
| 889 // calculate stack size if it's not specified by caller | |
| 890 if (stack_size == 0) { | |
| 891 stack_size = os::Linux::default_stack_size(thr_type); | |
| 892 | |
| 893 switch (thr_type) { | |
| 894 case os::java_thread: | |
|
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896 // changed with the flag -Xss |
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897 assert (JavaThread::stack_size_at_create() > 0, "this should be set"); |
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898 stack_size = JavaThread::stack_size_at_create(); |
| 0 | 899 break; |
| 900 case os::compiler_thread: | |
| 901 if (CompilerThreadStackSize > 0) { | |
| 902 stack_size = (size_t)(CompilerThreadStackSize * K); | |
| 903 break; | |
| 904 } // else fall through: | |
| 905 // use VMThreadStackSize if CompilerThreadStackSize is not defined | |
| 906 case os::vm_thread: | |
| 907 case os::pgc_thread: | |
| 908 case os::cgc_thread: | |
| 909 case os::watcher_thread: | |
| 910 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); | |
| 911 break; | |
| 912 } | |
| 913 } | |
| 914 | |
| 915 stack_size = MAX2(stack_size, os::Linux::min_stack_allowed); | |
| 916 pthread_attr_setstacksize(&attr, stack_size); | |
| 917 } else { | |
| 918 // let pthread_create() pick the default value. | |
| 919 } | |
| 920 | |
| 921 // glibc guard page | |
| 922 pthread_attr_setguardsize(&attr, os::Linux::default_guard_size(thr_type)); | |
| 923 | |
| 924 ThreadState state; | |
| 925 | |
| 926 { | |
| 927 // Serialize thread creation if we are running with fixed stack LinuxThreads | |
| 928 bool lock = os::Linux::is_LinuxThreads() && !os::Linux::is_floating_stack(); | |
| 929 if (lock) { | |
| 930 os::Linux::createThread_lock()->lock_without_safepoint_check(); | |
| 931 } | |
| 932 | |
| 933 pthread_t tid; | |
| 934 int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); | |
| 935 | |
| 936 pthread_attr_destroy(&attr); | |
| 937 | |
| 938 if (ret != 0) { | |
| 939 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 940 perror("pthread_create()"); | |
| 941 } | |
| 942 // Need to clean up stuff we've allocated so far | |
| 943 thread->set_osthread(NULL); | |
| 944 delete osthread; | |
| 945 if (lock) os::Linux::createThread_lock()->unlock(); | |
| 946 return false; | |
| 947 } | |
| 948 | |
| 949 // Store pthread info into the OSThread | |
| 950 osthread->set_pthread_id(tid); | |
| 951 | |
| 952 // Wait until child thread is either initialized or aborted | |
| 953 { | |
| 954 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 955 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 956 while ((state = osthread->get_state()) == ALLOCATED) { | |
| 957 sync_with_child->wait(Mutex::_no_safepoint_check_flag); | |
| 958 } | |
| 959 } | |
| 960 | |
| 961 if (lock) { | |
| 962 os::Linux::createThread_lock()->unlock(); | |
| 963 } | |
| 964 } | |
| 965 | |
| 966 // Aborted due to thread limit being reached | |
| 967 if (state == ZOMBIE) { | |
| 968 thread->set_osthread(NULL); | |
| 969 delete osthread; | |
| 970 return false; | |
| 971 } | |
| 972 | |
| 973 // The thread is returned suspended (in state INITIALIZED), | |
| 974 // and is started higher up in the call chain | |
| 975 assert(state == INITIALIZED, "race condition"); | |
| 976 return true; | |
| 977 } | |
| 978 | |
| 979 ///////////////////////////////////////////////////////////////////////////// | |
| 980 // attach existing thread | |
| 981 | |
| 982 // bootstrap the main thread | |
| 983 bool os::create_main_thread(JavaThread* thread) { | |
| 984 assert(os::Linux::_main_thread == pthread_self(), "should be called inside main thread"); | |
| 985 return create_attached_thread(thread); | |
| 986 } | |
| 987 | |
| 988 bool os::create_attached_thread(JavaThread* thread) { | |
| 989 #ifdef ASSERT | |
| 990 thread->verify_not_published(); | |
| 991 #endif | |
| 992 | |
| 993 // Allocate the OSThread object | |
| 994 OSThread* osthread = new OSThread(NULL, NULL); | |
| 995 | |
| 996 if (osthread == NULL) { | |
| 997 return false; | |
| 998 } | |
| 999 | |
| 1000 // Store pthread info into the OSThread | |
| 1001 osthread->set_thread_id(os::Linux::gettid()); | |
| 1002 osthread->set_pthread_id(::pthread_self()); | |
| 1003 | |
| 1004 // initialize floating point control register | |
| 1005 os::Linux::init_thread_fpu_state(); | |
| 1006 | |
| 1007 // Initial thread state is RUNNABLE | |
| 1008 osthread->set_state(RUNNABLE); | |
| 1009 | |
| 1010 thread->set_osthread(osthread); | |
| 1011 | |
| 1012 if (UseNUMA) { | |
| 1013 int lgrp_id = os::numa_get_group_id(); | |
| 1014 if (lgrp_id != -1) { | |
| 1015 thread->set_lgrp_id(lgrp_id); | |
| 1016 } | |
| 1017 } | |
| 1018 | |
| 1019 if (os::Linux::is_initial_thread()) { | |
| 1020 // If current thread is initial thread, its stack is mapped on demand, | |
| 1021 // see notes about MAP_GROWSDOWN. Here we try to force kernel to map | |
| 1022 // the entire stack region to avoid SEGV in stack banging. | |
| 1023 // It is also useful to get around the heap-stack-gap problem on SuSE | |
| 1024 // kernel (see 4821821 for details). We first expand stack to the top | |
| 1025 // of yellow zone, then enable stack yellow zone (order is significant, | |
| 1026 // enabling yellow zone first will crash JVM on SuSE Linux), so there | |
| 1027 // is no gap between the last two virtual memory regions. | |
| 1028 | |
| 1029 JavaThread *jt = (JavaThread *)thread; | |
| 1030 address addr = jt->stack_yellow_zone_base(); | |
| 1031 assert(addr != NULL, "initialization problem?"); | |
| 1032 assert(jt->stack_available(addr) > 0, "stack guard should not be enabled"); | |
| 1033 | |
| 1034 osthread->set_expanding_stack(); | |
| 1035 os::Linux::manually_expand_stack(jt, addr); | |
| 1036 osthread->clear_expanding_stack(); | |
| 1037 } | |
| 1038 | |
| 1039 // initialize signal mask for this thread | |
| 1040 // and save the caller's signal mask | |
| 1041 os::Linux::hotspot_sigmask(thread); | |
| 1042 | |
| 1043 return true; | |
| 1044 } | |
| 1045 | |
| 1046 void os::pd_start_thread(Thread* thread) { | |
| 1047 OSThread * osthread = thread->osthread(); | |
| 1048 assert(osthread->get_state() != INITIALIZED, "just checking"); | |
| 1049 Monitor* sync_with_child = osthread->startThread_lock(); | |
| 1050 MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); | |
| 1051 sync_with_child->notify(); | |
| 1052 } | |
| 1053 | |
| 1054 // Free Linux resources related to the OSThread | |
| 1055 void os::free_thread(OSThread* osthread) { | |
| 1056 assert(osthread != NULL, "osthread not set"); | |
| 1057 | |
| 1058 if (Thread::current()->osthread() == osthread) { | |
| 1059 // Restore caller's signal mask | |
| 1060 sigset_t sigmask = osthread->caller_sigmask(); | |
| 1061 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); | |
| 1062 } | |
| 1063 | |
| 1064 delete osthread; | |
| 1065 } | |
| 1066 | |
| 1067 ////////////////////////////////////////////////////////////////////////////// | |
| 1068 // thread local storage | |
| 1069 | |
| 1070 int os::allocate_thread_local_storage() { | |
| 1071 pthread_key_t key; | |
| 1072 int rslt = pthread_key_create(&key, NULL); | |
| 1073 assert(rslt == 0, "cannot allocate thread local storage"); | |
| 1074 return (int)key; | |
| 1075 } | |
| 1076 | |
| 1077 // Note: This is currently not used by VM, as we don't destroy TLS key | |
| 1078 // on VM exit. | |
| 1079 void os::free_thread_local_storage(int index) { | |
| 1080 int rslt = pthread_key_delete((pthread_key_t)index); | |
| 1081 assert(rslt == 0, "invalid index"); | |
| 1082 } | |
| 1083 | |
| 1084 void os::thread_local_storage_at_put(int index, void* value) { | |
| 1085 int rslt = pthread_setspecific((pthread_key_t)index, value); | |
| 1086 assert(rslt == 0, "pthread_setspecific failed"); | |
| 1087 } | |
| 1088 | |
| 1089 extern "C" Thread* get_thread() { | |
| 1090 return ThreadLocalStorage::thread(); | |
| 1091 } | |
| 1092 | |
| 1093 ////////////////////////////////////////////////////////////////////////////// | |
| 1094 // initial thread | |
| 1095 | |
| 1096 // Check if current thread is the initial thread, similar to Solaris thr_main. | |
| 1097 bool os::Linux::is_initial_thread(void) { | |
| 1098 char dummy; | |
| 1099 // If called before init complete, thread stack bottom will be null. | |
| 1100 // Can be called if fatal error occurs before initialization. | |
| 1101 if (initial_thread_stack_bottom() == NULL) return false; | |
| 1102 assert(initial_thread_stack_bottom() != NULL && | |
| 1103 initial_thread_stack_size() != 0, | |
| 1104 "os::init did not locate initial thread's stack region"); | |
| 1105 if ((address)&dummy >= initial_thread_stack_bottom() && | |
| 1106 (address)&dummy < initial_thread_stack_bottom() + initial_thread_stack_size()) | |
| 1107 return true; | |
| 1108 else return false; | |
| 1109 } | |
| 1110 | |
| 1111 // Find the virtual memory area that contains addr | |
| 1112 static bool find_vma(address addr, address* vma_low, address* vma_high) { | |
| 1113 FILE *fp = fopen("/proc/self/maps", "r"); | |
| 1114 if (fp) { | |
| 1115 address low, high; | |
| 1116 while (!feof(fp)) { | |
| 1117 if (fscanf(fp, "%p-%p", &low, &high) == 2) { | |
| 1118 if (low <= addr && addr < high) { | |
| 1119 if (vma_low) *vma_low = low; | |
| 1120 if (vma_high) *vma_high = high; | |
| 1121 fclose (fp); | |
| 1122 return true; | |
| 1123 } | |
| 1124 } | |
| 1125 for (;;) { | |
| 1126 int ch = fgetc(fp); | |
| 1127 if (ch == EOF || ch == (int)'\n') break; | |
| 1128 } | |
| 1129 } | |
| 1130 fclose(fp); | |
| 1131 } | |
| 1132 return false; | |
| 1133 } | |
| 1134 | |
| 1135 // Locate initial thread stack. This special handling of initial thread stack | |
| 1136 // is needed because pthread_getattr_np() on most (all?) Linux distros returns | |
| 1137 // bogus value for initial thread. | |
| 1138 void os::Linux::capture_initial_stack(size_t max_size) { | |
| 1139 // stack size is the easy part, get it from RLIMIT_STACK | |
| 1140 size_t stack_size; | |
| 1141 struct rlimit rlim; | |
| 1142 getrlimit(RLIMIT_STACK, &rlim); | |
| 1143 stack_size = rlim.rlim_cur; | |
| 1144 | |
| 1145 // 6308388: a bug in ld.so will relocate its own .data section to the | |
| 1146 // lower end of primordial stack; reduce ulimit -s value a little bit | |
| 1147 // so we won't install guard page on ld.so's data section. | |
| 1148 stack_size -= 2 * page_size(); | |
| 1149 | |
| 1150 // 4441425: avoid crash with "unlimited" stack size on SuSE 7.1 or Redhat | |
| 1151 // 7.1, in both cases we will get 2G in return value. | |
| 1152 // 4466587: glibc 2.2.x compiled w/o "--enable-kernel=2.4.0" (RH 7.0, | |
| 1153 // SuSE 7.2, Debian) can not handle alternate signal stack correctly | |
| 1154 // for initial thread if its stack size exceeds 6M. Cap it at 2M, | |
| 1155 // in case other parts in glibc still assumes 2M max stack size. | |
| 1156 // FIXME: alt signal stack is gone, maybe we can relax this constraint? | |
| 1157 // Problem still exists RH7.2 (IA64 anyway) but 2MB is a little small | |
| 7994 | 1158 if (stack_size > 2 * K * K IA64_ONLY(*2)) |
| 1159 stack_size = 2 * K * K IA64_ONLY(*2); | |
| 0 | 1160 // Try to figure out where the stack base (top) is. This is harder. |
| 1161 // | |
| 1162 // When an application is started, glibc saves the initial stack pointer in | |
| 1163 // a global variable "__libc_stack_end", which is then used by system | |
| 1164 // libraries. __libc_stack_end should be pretty close to stack top. The | |
| 1165 // variable is available since the very early days. However, because it is | |
| 1166 // a private interface, it could disappear in the future. | |
| 1167 // | |
| 1168 // Linux kernel saves start_stack information in /proc/<pid>/stat. Similar | |
| 1169 // to __libc_stack_end, it is very close to stack top, but isn't the real | |
| 1170 // stack top. Note that /proc may not exist if VM is running as a chroot | |
| 1171 // program, so reading /proc/<pid>/stat could fail. Also the contents of | |
| 1172 // /proc/<pid>/stat could change in the future (though unlikely). | |
| 1173 // | |
| 1174 // We try __libc_stack_end first. If that doesn't work, look for | |
| 1175 // /proc/<pid>/stat. If neither of them works, we use current stack pointer | |
| 1176 // as a hint, which should work well in most cases. | |
| 1177 | |
| 1178 uintptr_t stack_start; | |
| 1179 | |
| 1180 // try __libc_stack_end first | |
| 1181 uintptr_t *p = (uintptr_t *)dlsym(RTLD_DEFAULT, "__libc_stack_end"); | |
| 1182 if (p && *p) { | |
| 1183 stack_start = *p; | |
| 1184 } else { | |
| 1185 // see if we can get the start_stack field from /proc/self/stat | |
| 1186 FILE *fp; | |
| 1187 int pid; | |
| 1188 char state; | |
| 1189 int ppid; | |
| 1190 int pgrp; | |
| 1191 int session; | |
| 1192 int nr; | |
| 1193 int tpgrp; | |
| 1194 unsigned long flags; | |
| 1195 unsigned long minflt; | |
| 1196 unsigned long cminflt; | |
| 1197 unsigned long majflt; | |
| 1198 unsigned long cmajflt; | |
| 1199 unsigned long utime; | |
| 1200 unsigned long stime; | |
| 1201 long cutime; | |
| 1202 long cstime; | |
| 1203 long prio; | |
| 1204 long nice; | |
| 1205 long junk; | |
| 1206 long it_real; | |
| 1207 uintptr_t start; | |
| 1208 uintptr_t vsize; | |
|
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1210 uintptr_t rsslim; |
| 0 | 1211 uintptr_t scodes; |
| 1212 uintptr_t ecode; | |
| 1213 int i; | |
| 1214 | |
| 1215 // Figure what the primordial thread stack base is. Code is inspired | |
| 1216 // by email from Hans Boehm. /proc/self/stat begins with current pid, | |
| 1217 // followed by command name surrounded by parentheses, state, etc. | |
| 1218 char stat[2048]; | |
| 1219 int statlen; | |
| 1220 | |
| 1221 fp = fopen("/proc/self/stat", "r"); | |
| 1222 if (fp) { | |
| 1223 statlen = fread(stat, 1, 2047, fp); | |
| 1224 stat[statlen] = '\0'; | |
| 1225 fclose(fp); | |
| 1226 | |
| 1227 // Skip pid and the command string. Note that we could be dealing with | |
| 1228 // weird command names, e.g. user could decide to rename java launcher | |
| 1229 // to "java 1.4.2 :)", then the stat file would look like | |
| 1230 // 1234 (java 1.4.2 :)) R ... ... | |
| 1231 // We don't really need to know the command string, just find the last | |
| 1232 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 1233 char * s = strrchr(stat, ')'); | |
| 1234 | |
| 1235 i = 0; | |
| 1236 if (s) { | |
| 1237 // Skip blank chars | |
| 1238 do s++; while (isspace(*s)); | |
| 1239 | |
|
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1240 #define _UFM UINTX_FORMAT |
|
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1241 #define _DFM INTX_FORMAT |
|
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1242 |
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1243 /* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 */ |
|
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1244 /* 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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1245 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 | 1246 &state, /* 3 %c */ |
| 1247 &ppid, /* 4 %d */ | |
| 1248 &pgrp, /* 5 %d */ | |
| 1249 &session, /* 6 %d */ | |
| 1250 &nr, /* 7 %d */ | |
| 1251 &tpgrp, /* 8 %d */ | |
| 1252 &flags, /* 9 %lu */ | |
| 1253 &minflt, /* 10 %lu */ | |
| 1254 &cminflt, /* 11 %lu */ | |
| 1255 &majflt, /* 12 %lu */ | |
| 1256 &cmajflt, /* 13 %lu */ | |
| 1257 &utime, /* 14 %lu */ | |
| 1258 &stime, /* 15 %lu */ | |
| 1259 &cutime, /* 16 %ld */ | |
| 1260 &cstime, /* 17 %ld */ | |
| 1261 &prio, /* 18 %ld */ | |
| 1262 &nice, /* 19 %ld */ | |
| 1263 &junk, /* 20 %ld */ | |
| 1264 &it_real, /* 21 %ld */ | |
|
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1265 &start, /* 22 UINTX_FORMAT */ |
|
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1266 &vsize, /* 23 UINTX_FORMAT */ |
|
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1267 &rss, /* 24 INTX_FORMAT */ |
|
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1268 &rsslim, /* 25 UINTX_FORMAT */ |
|
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1269 &scodes, /* 26 UINTX_FORMAT */ |
|
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1270 &ecode, /* 27 UINTX_FORMAT */ |
|
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1271 &stack_start); /* 28 UINTX_FORMAT */ |
| 0 | 1272 } |
| 1273 | |
|
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1274 #undef _UFM |
|
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1275 #undef _DFM |
|
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|
1276 |
| 0 | 1277 if (i != 28 - 2) { |
| 1278 assert(false, "Bad conversion from /proc/self/stat"); | |
| 1279 // product mode - assume we are the initial thread, good luck in the | |
| 1280 // embedded case. | |
| 1281 warning("Can't detect initial thread stack location - bad conversion"); | |
| 1282 stack_start = (uintptr_t) &rlim; | |
| 1283 } | |
| 1284 } else { | |
| 1285 // For some reason we can't open /proc/self/stat (for example, running on | |
| 1286 // FreeBSD with a Linux emulator, or inside chroot), this should work for | |
| 1287 // most cases, so don't abort: | |
| 1288 warning("Can't detect initial thread stack location - no /proc/self/stat"); | |
| 1289 stack_start = (uintptr_t) &rlim; | |
| 1290 } | |
| 1291 } | |
| 1292 | |
| 1293 // Now we have a pointer (stack_start) very close to the stack top, the | |
| 1294 // next thing to do is to figure out the exact location of stack top. We | |
| 1295 // can find out the virtual memory area that contains stack_start by | |
| 1296 // reading /proc/self/maps, it should be the last vma in /proc/self/maps, | |
| 1297 // and its upper limit is the real stack top. (again, this would fail if | |
| 1298 // running inside chroot, because /proc may not exist.) | |
| 1299 | |
| 1300 uintptr_t stack_top; | |
| 1301 address low, high; | |
| 1302 if (find_vma((address)stack_start, &low, &high)) { | |
| 1303 // success, "high" is the true stack top. (ignore "low", because initial | |
| 1304 // thread stack grows on demand, its real bottom is high - RLIMIT_STACK.) | |
| 1305 stack_top = (uintptr_t)high; | |
| 1306 } else { | |
| 1307 // failed, likely because /proc/self/maps does not exist | |
| 1308 warning("Can't detect initial thread stack location - find_vma failed"); | |
| 1309 // best effort: stack_start is normally within a few pages below the real | |
| 1310 // stack top, use it as stack top, and reduce stack size so we won't put | |
| 1311 // guard page outside stack. | |
| 1312 stack_top = stack_start; | |
| 1313 stack_size -= 16 * page_size(); | |
| 1314 } | |
| 1315 | |
| 1316 // stack_top could be partially down the page so align it | |
| 1317 stack_top = align_size_up(stack_top, page_size()); | |
| 1318 | |
| 1319 if (max_size && stack_size > max_size) { | |
| 1320 _initial_thread_stack_size = max_size; | |
| 1321 } else { | |
| 1322 _initial_thread_stack_size = stack_size; | |
| 1323 } | |
| 1324 | |
| 1325 _initial_thread_stack_size = align_size_down(_initial_thread_stack_size, page_size()); | |
| 1326 _initial_thread_stack_bottom = (address)stack_top - _initial_thread_stack_size; | |
| 1327 } | |
| 1328 | |
| 1329 //////////////////////////////////////////////////////////////////////////////// | |
| 1330 // time support | |
| 1331 | |
| 1332 // Time since start-up in seconds to a fine granularity. | |
| 1333 // Used by VMSelfDestructTimer and the MemProfiler. | |
| 1334 double os::elapsedTime() { | |
| 1335 | |
|
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1336 return ((double)os::elapsed_counter()) / os::elapsed_frequency(); // nanosecond resolution |
| 0 | 1337 } |
| 1338 | |
| 1339 jlong os::elapsed_counter() { | |
|
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1340 return javaTimeNanos() - initial_time_count; |
| 0 | 1341 } |
| 1342 | |
| 1343 jlong os::elapsed_frequency() { | |
|
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1344 return NANOSECS_PER_SEC; // nanosecond resolution |
| 0 | 1345 } |
| 1346 | |
|
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1347 bool os::supports_vtime() { return true; } |
|
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1348 bool os::enable_vtime() { return false; } |
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1349 bool os::vtime_enabled() { return false; } |
|
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1350 |
|
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1351 double os::elapsedVTime() { |
|
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1352 struct rusage usage; |
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1353 int retval = getrusage(RUSAGE_THREAD, &usage); |
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1354 if (retval == 0) { |
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1355 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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1356 } else { |
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1357 // better than nothing, but not much |
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1358 return elapsedTime(); |
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1359 } |
|
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1360 } |
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|
1361 |
| 61 | 1362 jlong os::javaTimeMillis() { |
| 0 | 1363 timeval time; |
| 1364 int status = gettimeofday(&time, NULL); | |
| 1365 assert(status != -1, "linux error"); | |
| 1366 return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); | |
| 1367 } | |
| 1368 | |
| 1369 #ifndef CLOCK_MONOTONIC | |
| 1370 #define CLOCK_MONOTONIC (1) | |
| 1371 #endif | |
| 1372 | |
| 1373 void os::Linux::clock_init() { | |
| 1374 // we do dlopen's in this particular order due to bug in linux | |
| 1375 // dynamical loader (see 6348968) leading to crash on exit | |
| 1376 void* handle = dlopen("librt.so.1", RTLD_LAZY); | |
| 1377 if (handle == NULL) { | |
| 1378 handle = dlopen("librt.so", RTLD_LAZY); | |
| 1379 } | |
| 1380 | |
| 1381 if (handle) { | |
| 1382 int (*clock_getres_func)(clockid_t, struct timespec*) = | |
| 1383 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_getres"); | |
| 1384 int (*clock_gettime_func)(clockid_t, struct timespec*) = | |
| 1385 (int(*)(clockid_t, struct timespec*))dlsym(handle, "clock_gettime"); | |
| 1386 if (clock_getres_func && clock_gettime_func) { | |
| 1387 // See if monotonic clock is supported by the kernel. Note that some | |
| 1388 // early implementations simply return kernel jiffies (updated every | |
| 1389 // 1/100 or 1/1000 second). It would be bad to use such a low res clock | |
| 1390 // for nano time (though the monotonic property is still nice to have). | |
| 1391 // It's fixed in newer kernels, however clock_getres() still returns | |
| 1392 // 1/HZ. We check if clock_getres() works, but will ignore its reported | |
| 1393 // resolution for now. Hopefully as people move to new kernels, this | |
| 1394 // won't be a problem. | |
| 1395 struct timespec res; | |
| 1396 struct timespec tp; | |
| 1397 if (clock_getres_func (CLOCK_MONOTONIC, &res) == 0 && | |
| 1398 clock_gettime_func(CLOCK_MONOTONIC, &tp) == 0) { | |
| 1399 // yes, monotonic clock is supported | |
| 1400 _clock_gettime = clock_gettime_func; | |
|
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1401 return; |
| 0 | 1402 } else { |
| 1403 // close librt if there is no monotonic clock | |
| 1404 dlclose(handle); | |
| 1405 } | |
| 1406 } | |
| 1407 } | |
|
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1408 warning("No monotonic clock was available - timed services may " \ |
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1409 "be adversely affected if the time-of-day clock changes"); |
| 0 | 1410 } |
| 1411 | |
| 1412 #ifndef SYS_clock_getres | |
| 1413 | |
| 1414 #if defined(IA32) || defined(AMD64) | |
| 1415 #define SYS_clock_getres IA32_ONLY(266) AMD64_ONLY(229) | |
|
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1416 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1417 #else |
|
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1418 #warning "SYS_clock_getres not defined for this platform, disabling fast_thread_cpu_time" |
|
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1419 #define sys_clock_getres(x,y) -1 |
| 0 | 1420 #endif |
| 1421 | |
|
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1422 #else |
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1423 #define sys_clock_getres(x,y) ::syscall(SYS_clock_getres, x, y) |
| 0 | 1424 #endif |
| 1425 | |
| 1426 void os::Linux::fast_thread_clock_init() { | |
| 1427 if (!UseLinuxPosixThreadCPUClocks) { | |
| 1428 return; | |
| 1429 } | |
| 1430 clockid_t clockid; | |
| 1431 struct timespec tp; | |
| 1432 int (*pthread_getcpuclockid_func)(pthread_t, clockid_t *) = | |
| 1433 (int(*)(pthread_t, clockid_t *)) dlsym(RTLD_DEFAULT, "pthread_getcpuclockid"); | |
| 1434 | |
| 1435 // Switch to using fast clocks for thread cpu time if | |
| 1436 // the sys_clock_getres() returns 0 error code. | |
| 1437 // Note, that some kernels may support the current thread | |
| 1438 // clock (CLOCK_THREAD_CPUTIME_ID) but not the clocks | |
| 1439 // returned by the pthread_getcpuclockid(). | |
| 1440 // If the fast Posix clocks are supported then the sys_clock_getres() | |
| 1441 // must return at least tp.tv_sec == 0 which means a resolution | |
| 1442 // better than 1 sec. This is extra check for reliability. | |
| 1443 | |
| 1444 if(pthread_getcpuclockid_func && | |
| 1445 pthread_getcpuclockid_func(_main_thread, &clockid) == 0 && | |
| 1446 sys_clock_getres(clockid, &tp) == 0 && tp.tv_sec == 0) { | |
| 1447 | |
| 1448 _supports_fast_thread_cpu_time = true; | |
| 1449 _pthread_getcpuclockid = pthread_getcpuclockid_func; | |
| 1450 } | |
| 1451 } | |
| 1452 | |
| 1453 jlong os::javaTimeNanos() { | |
| 1454 if (Linux::supports_monotonic_clock()) { | |
| 1455 struct timespec tp; | |
| 1456 int status = Linux::clock_gettime(CLOCK_MONOTONIC, &tp); | |
| 1457 assert(status == 0, "gettime error"); | |
| 1458 jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); | |
| 1459 return result; | |
| 1460 } else { | |
| 1461 timeval time; | |
| 1462 int status = gettimeofday(&time, NULL); | |
| 1463 assert(status != -1, "linux error"); | |
| 1464 jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); | |
| 1465 return 1000 * usecs; | |
| 1466 } | |
| 1467 } | |
| 1468 | |
| 1469 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { | |
| 1470 if (Linux::supports_monotonic_clock()) { | |
| 1471 info_ptr->max_value = ALL_64_BITS; | |
| 1472 | |
| 1473 // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past | |
| 1474 info_ptr->may_skip_backward = false; // not subject to resetting or drifting | |
| 1475 info_ptr->may_skip_forward = false; // not subject to resetting or drifting | |
| 1476 } else { | |
| 1477 // gettimeofday - based on time in seconds since the Epoch thus does not wrap | |
| 1478 info_ptr->max_value = ALL_64_BITS; | |
| 1479 | |
| 1480 // gettimeofday is a real time clock so it skips | |
| 1481 info_ptr->may_skip_backward = true; | |
| 1482 info_ptr->may_skip_forward = true; | |
| 1483 } | |
| 1484 | |
| 1485 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time | |
| 1486 } | |
| 1487 | |
| 1488 // Return the real, user, and system times in seconds from an | |
| 1489 // arbitrary fixed point in the past. | |
| 1490 bool os::getTimesSecs(double* process_real_time, | |
| 1491 double* process_user_time, | |
| 1492 double* process_system_time) { | |
| 1493 struct tms ticks; | |
| 1494 clock_t real_ticks = times(&ticks); | |
| 1495 | |
| 1496 if (real_ticks == (clock_t) (-1)) { | |
| 1497 return false; | |
| 1498 } else { | |
| 1499 double ticks_per_second = (double) clock_tics_per_sec; | |
| 1500 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; | |
| 1501 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; | |
| 1502 *process_real_time = ((double) real_ticks) / ticks_per_second; | |
| 1503 | |
| 1504 return true; | |
| 1505 } | |
| 1506 } | |
| 1507 | |
| 1508 | |
| 1509 char * os::local_time_string(char *buf, size_t buflen) { | |
| 1510 struct tm t; | |
| 1511 time_t long_time; | |
| 1512 time(&long_time); | |
| 1513 localtime_r(&long_time, &t); | |
| 1514 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", | |
| 1515 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, | |
| 1516 t.tm_hour, t.tm_min, t.tm_sec); | |
| 1517 return buf; | |
| 1518 } | |
| 1519 | |
|
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1520 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
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1521 return localtime_r(clock, res); |
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1522 } |
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1523 |
| 0 | 1524 //////////////////////////////////////////////////////////////////////////////// |
| 1525 // runtime exit support | |
| 1526 | |
| 1527 // Note: os::shutdown() might be called very early during initialization, or | |
| 1528 // called from signal handler. Before adding something to os::shutdown(), make | |
| 1529 // sure it is async-safe and can handle partially initialized VM. | |
| 1530 void os::shutdown() { | |
| 1531 | |
| 1532 // allow PerfMemory to attempt cleanup of any persistent resources | |
| 1533 perfMemory_exit(); | |
| 1534 | |
| 1535 // needs to remove object in file system | |
| 1536 AttachListener::abort(); | |
| 1537 | |
| 1538 // flush buffered output, finish log files | |
| 1539 ostream_abort(); | |
| 1540 | |
| 1541 // Check for abort hook | |
| 1542 abort_hook_t abort_hook = Arguments::abort_hook(); | |
| 1543 if (abort_hook != NULL) { | |
| 1544 abort_hook(); | |
| 1545 } | |
| 1546 | |
| 1547 } | |
| 1548 | |
| 1549 // Note: os::abort() might be called very early during initialization, or | |
| 1550 // called from signal handler. Before adding something to os::abort(), make | |
| 1551 // sure it is async-safe and can handle partially initialized VM. | |
| 1552 void os::abort(bool dump_core) { | |
| 1553 os::shutdown(); | |
| 1554 if (dump_core) { | |
| 1555 #ifndef PRODUCT | |
| 1556 fdStream out(defaultStream::output_fd()); | |
| 1557 out.print_raw("Current thread is "); | |
| 1558 char buf[16]; | |
| 1559 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); | |
| 1560 out.print_raw_cr(buf); | |
| 1561 out.print_raw_cr("Dumping core ..."); | |
| 1562 #endif | |
| 1563 ::abort(); // dump core | |
| 1564 } | |
| 1565 | |
| 1566 ::exit(1); | |
| 1567 } | |
| 1568 | |
| 1569 // Die immediately, no exit hook, no abort hook, no cleanup. | |
| 1570 void os::die() { | |
| 1571 // _exit() on LinuxThreads only kills current thread | |
| 1572 ::abort(); | |
| 1573 } | |
| 1574 | |
| 1575 // unused on linux for now. | |
| 1576 void os::set_error_file(const char *logfile) {} | |
| 1577 | |
|
1980
828eafbd85cc
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ikrylov
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1972
diff
changeset
|
1578 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
1579 // This method is a copy of JDK's sysGetLastErrorString |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
1580 // from src/solaris/hpi/src/system_md.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
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|
1581 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
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|
1582 size_t os::lasterror(char *buf, size_t len) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
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|
1583 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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diff
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|
1584 if (errno == 0) return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
1585 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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parents:
1972
diff
changeset
|
1586 const char *s = ::strerror(errno); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
1587 size_t n = ::strlen(s); |
|
828eafbd85cc
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diff
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|
1588 if (n >= len) { |
|
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6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
1589 n = len - 1; |
|
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6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
1590 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
1591 ::strncpy(buf, s, n); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
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|
1592 buf[n] = '\0'; |
|
828eafbd85cc
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diff
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|
1593 return n; |
|
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6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
1594 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
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1972
diff
changeset
|
1595 |
| 0 | 1596 intx os::current_thread_id() { return (intx)pthread_self(); } |
| 1597 int os::current_process_id() { | |
| 1598 | |
| 1599 // Under the old linux thread library, linux gives each thread | |
| 1600 // its own process id. Because of this each thread will return | |
| 1601 // a different pid if this method were to return the result | |
| 1602 // of getpid(2). Linux provides no api that returns the pid | |
| 1603 // of the launcher thread for the vm. This implementation | |
| 1604 // returns a unique pid, the pid of the launcher thread | |
| 1605 // that starts the vm 'process'. | |
| 1606 | |
| 1607 // Under the NPTL, getpid() returns the same pid as the | |
| 1608 // launcher thread rather than a unique pid per thread. | |
| 1609 // Use gettid() if you want the old pre NPTL behaviour. | |
| 1610 | |
| 1611 // if you are looking for the result of a call to getpid() that | |
| 1612 // returns a unique pid for the calling thread, then look at the | |
| 1613 // OSThread::thread_id() method in osThread_linux.hpp file | |
| 1614 | |
| 1615 return (int)(_initial_pid ? _initial_pid : getpid()); | |
| 1616 } | |
| 1617 | |
| 1618 // DLL functions | |
| 1619 | |
| 1620 const char* os::dll_file_extension() { return ".so"; } | |
| 1621 | |
|
2130
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
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2033
diff
changeset
|
1622 // This must be hard coded because it's the system's temporary |
|
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
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2033
diff
changeset
|
1623 // directory not the java application's temp directory, ala java.io.tmpdir. |
|
34d64ad817f4
7009828: Fix for 6938627 breaks visualvm monitoring when -Djava.io.tmpdir is defined
coleenp
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2033
diff
changeset
|
1624 const char* os::get_temp_directory() { return "/tmp"; } |
| 0 | 1625 |
| 691 | 1626 static bool file_exists(const char* filename) { |
| 1627 struct stat statbuf; | |
| 1628 if (filename == NULL || strlen(filename) == 0) { | |
| 1629 return false; | |
| 1630 } | |
| 1631 return os::stat(filename, &statbuf) == 0; | |
| 1632 } | |
| 1633 | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
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diff
changeset
|
1634 bool os::dll_build_name(char* buffer, size_t buflen, |
| 691 | 1635 const char* pname, const char* fname) { |
|
6966
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8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
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diff
changeset
|
1636 bool retval = false; |
| 691 | 1637 // Copied from libhpi |
| 242 | 1638 const size_t pnamelen = pname ? strlen(pname) : 0; |
| 1639 | |
|
6966
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8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
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diff
changeset
|
1640 // Return error on buffer overflow. |
| 242 | 1641 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { |
|
6966
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8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
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diff
changeset
|
1642 return retval; |
| 242 | 1643 } |
| 1644 | |
| 1645 if (pnamelen == 0) { | |
| 691 | 1646 snprintf(buffer, buflen, "lib%s.so", fname); |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
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6825
diff
changeset
|
1647 retval = true; |
| 691 | 1648 } else if (strchr(pname, *os::path_separator()) != NULL) { |
| 1649 int n; | |
| 1650 char** pelements = split_path(pname, &n); | |
|
9059
17bf4d428955
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
8812
diff
changeset
|
1651 if (pelements == NULL) { |
| 9062 | 1652 return false; |
|
9059
17bf4d428955
8006103: [parfait] Possible null pointer dereference at hotspot/src/os/linux/vm/os_linux.cpp; os_windows.cpp; os_solaris.cpp; os_bsd.cpp
ccheung
parents:
8812
diff
changeset
|
1653 } |
| 691 | 1654 for (int i = 0 ; i < n ; i++) { |
| 1655 // Really shouldn't be NULL, but check can't hurt | |
| 1656 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { | |
| 1657 continue; // skip the empty path values | |
| 1658 } | |
| 1659 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); | |
| 1660 if (file_exists(buffer)) { | |
|
6966
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diff
changeset
|
1661 retval = true; |
| 691 | 1662 break; |
| 1663 } | |
| 1664 } | |
| 1665 // release the storage | |
| 1666 for (int i = 0 ; i < n ; i++) { | |
| 1667 if (pelements[i] != NULL) { | |
| 6197 | 1668 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
| 691 | 1669 } |
| 1670 } | |
| 1671 if (pelements != NULL) { | |
| 6197 | 1672 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
| 691 | 1673 } |
| 242 | 1674 } else { |
| 691 | 1675 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); |
|
6966
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diff
changeset
|
1676 retval = true; |
|
6cb0d32b828b
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diff
changeset
|
1677 } |
|
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changeset
|
1678 return retval; |
| 242 | 1679 } |
| 1680 | |
|
7456
7d42f3b08300
8005044: remove crufty '_g' support from HS runtime code
dcubed
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changeset
|
1681 // check if addr is inside libjvm.so |
| 0 | 1682 bool os::address_is_in_vm(address addr) { |
| 1683 static address libjvm_base_addr; | |
| 1684 Dl_info dlinfo; | |
| 1685 | |
| 1686 if (libjvm_base_addr == NULL) { | |
|
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|
1687 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
|
59b052799158
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|
1688 libjvm_base_addr = (address)dlinfo.dli_fbase; |
|
59b052799158
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|
1689 } |
| 0 | 1690 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
| 1691 } | |
| 1692 | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
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changeset
|
1693 if (dladdr((void *)addr, &dlinfo) != 0) { |
| 0 | 1694 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
| 1695 } | |
| 1696 | |
| 1697 return false; | |
| 1698 } | |
| 1699 | |
| 1700 bool os::dll_address_to_function_name(address addr, char *buf, | |
| 1701 int buflen, int *offset) { | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
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diff
changeset
|
1702 // 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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parents:
10986
diff
changeset
|
1703 assert(buf != NULL, "sanity check"); |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
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diff
changeset
|
1704 |
| 0 | 1705 Dl_info dlinfo; |
| 1706 | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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changeset
|
1707 if (dladdr((void*)addr, &dlinfo) != 0) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1708 // 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
|
1709 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
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diff
changeset
|
1710 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
|
1711 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1712 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1713 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1714 return true; |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1715 } |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
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diff
changeset
|
1716 // no matching symbol so try for just file info |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1717 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1718 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1719 buf, buflen, offset, dlinfo.dli_fname)) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1720 return true; |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1721 } |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1722 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
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diff
changeset
|
1723 } |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1724 |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
1725 buf[0] = '\0'; |
|
2022
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
zgu
parents:
1972
diff
changeset
|
1726 if (offset != NULL) *offset = -1; |
|
2d4762ec74af
7003748: Decode C stack frames when symbols are presented (PhoneHome project)
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parents:
1972
diff
changeset
|
1727 return false; |
| 0 | 1728 } |
| 1729 | |
| 1730 struct _address_to_library_name { | |
| 1731 address addr; // input : memory address | |
| 1732 size_t buflen; // size of fname | |
| 1733 char* fname; // output: library name | |
| 1734 address base; // library base addr | |
| 1735 }; | |
| 1736 | |
| 1737 static int address_to_library_name_callback(struct dl_phdr_info *info, | |
| 1738 size_t size, void *data) { | |
| 1739 int i; | |
| 1740 bool found = false; | |
| 1741 address libbase = NULL; | |
| 1742 struct _address_to_library_name * d = (struct _address_to_library_name *)data; | |
| 1743 | |
| 1744 // iterate through all loadable segments | |
| 1745 for (i = 0; i < info->dlpi_phnum; i++) { | |
| 1746 address segbase = (address)(info->dlpi_addr + info->dlpi_phdr[i].p_vaddr); | |
| 1747 if (info->dlpi_phdr[i].p_type == PT_LOAD) { | |
| 1748 // base address of a library is the lowest address of its loaded | |
| 1749 // segments. | |
| 1750 if (libbase == NULL || libbase > segbase) { | |
| 1751 libbase = segbase; | |
| 1752 } | |
| 1753 // see if 'addr' is within current segment | |
| 1754 if (segbase <= d->addr && | |
| 1755 d->addr < segbase + info->dlpi_phdr[i].p_memsz) { | |
| 1756 found = true; | |
| 1757 } | |
| 1758 } | |
| 1759 } | |
| 1760 | |
| 1761 // dlpi_name is NULL or empty if the ELF file is executable, return 0 | |
| 1762 // so dll_address_to_library_name() can fall through to use dladdr() which | |
| 1763 // can figure out executable name from argv[0]. | |
| 1764 if (found && info->dlpi_name && info->dlpi_name[0]) { | |
| 1765 d->base = libbase; | |
| 1766 if (d->fname) { | |
| 1767 jio_snprintf(d->fname, d->buflen, "%s", info->dlpi_name); | |
| 1768 } | |
| 1769 return 1; | |
| 1770 } | |
| 1771 return 0; | |
| 1772 } | |
| 1773 | |
| 1774 bool os::dll_address_to_library_name(address addr, char* buf, | |
| 1775 int buflen, int* offset) { | |
|
11092
59b052799158
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diff
changeset
|
1776 // buf is not optional, but offset is optional |
|
59b052799158
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parents:
10986
diff
changeset
|
1777 assert(buf != NULL, "sanity check"); |
|
59b052799158
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diff
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|
1778 |
| 0 | 1779 Dl_info dlinfo; |
| 1780 struct _address_to_library_name data; | |
| 1781 | |
| 1782 // There is a bug in old glibc dladdr() implementation that it could resolve | |
| 1783 // to wrong library name if the .so file has a base address != NULL. Here | |
| 1784 // we iterate through the program headers of all loaded libraries to find | |
| 1785 // out which library 'addr' really belongs to. This workaround can be | |
| 1786 // removed once the minimum requirement for glibc is moved to 2.3.x. | |
| 1787 data.addr = addr; | |
| 1788 data.fname = buf; | |
| 1789 data.buflen = buflen; | |
| 1790 data.base = NULL; | |
| 1791 int rslt = dl_iterate_phdr(address_to_library_name_callback, (void *)&data); | |
| 1792 | |
| 1793 if (rslt) { | |
| 1794 // buf already contains library name | |
| 1795 if (offset) *offset = addr - data.base; | |
| 1796 return true; | |
|
11092
59b052799158
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diff
changeset
|
1797 } |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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diff
changeset
|
1798 if (dladdr((void*)addr, &dlinfo) != 0) { |
|
59b052799158
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dcubed
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diff
changeset
|
1799 if (dlinfo.dli_fname != NULL) { |
|
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
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changeset
|
1800 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
|
59b052799158
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diff
changeset
|
1801 } |
|
59b052799158
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diff
changeset
|
1802 if (dlinfo.dli_fbase != NULL && offset != NULL) { |
|
59b052799158
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|
1803 *offset = addr - (address)dlinfo.dli_fbase; |
|
59b052799158
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diff
changeset
|
1804 } |
|
59b052799158
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changeset
|
1805 return true; |
|
59b052799158
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dcubed
parents:
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diff
changeset
|
1806 } |
|
59b052799158
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diff
changeset
|
1807 |
|
59b052799158
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diff
changeset
|
1808 buf[0] = '\0'; |
|
59b052799158
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dcubed
parents:
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diff
changeset
|
1809 if (offset) *offset = -1; |
|
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1810 return false; |
| 0 | 1811 } |
| 1812 | |
| 1813 // Loads .dll/.so and | |
| 1814 // in case of error it checks if .dll/.so was built for the | |
| 1815 // same architecture as Hotspot is running on | |
| 1816 | |
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1817 |
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1818 // Remember the stack's state. The Linux dynamic linker will change |
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1819 // the stack to 'executable' at most once, so we must safepoint only once. |
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1820 bool os::Linux::_stack_is_executable = false; |
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1821 |
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1822 // VM operation that loads a library. This is necessary if stack protection |
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1823 // of the Java stacks can be lost during loading the library. If we |
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1824 // do not stop the Java threads, they can stack overflow before the stacks |
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1825 // are protected again. |
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1826 class VM_LinuxDllLoad: public VM_Operation { |
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1827 private: |
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1828 const char *_filename; |
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1829 char *_ebuf; |
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1830 int _ebuflen; |
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1831 void *_lib; |
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1832 public: |
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1833 VM_LinuxDllLoad(const char *fn, char *ebuf, int ebuflen) : |
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1834 _filename(fn), _ebuf(ebuf), _ebuflen(ebuflen), _lib(NULL) {} |
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1835 VMOp_Type type() const { return VMOp_LinuxDllLoad; } |
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1836 void doit() { |
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1837 _lib = os::Linux::dll_load_in_vmthread(_filename, _ebuf, _ebuflen); |
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1838 os::Linux::_stack_is_executable = true; |
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1839 } |
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1840 void* loaded_library() { return _lib; } |
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1841 }; |
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1842 |
| 0 | 1843 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
| 1844 { | |
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1845 void * result = NULL; |
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1846 bool load_attempted = false; |
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1847 |
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1848 // Check whether the library to load might change execution rights |
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1849 // of the stack. If they are changed, the protection of the stack |
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1850 // guard pages will be lost. We need a safepoint to fix this. |
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1851 // |
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1852 // See Linux man page execstack(8) for more info. |
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1853 if (os::uses_stack_guard_pages() && !os::Linux::_stack_is_executable) { |
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1854 ElfFile ef(filename); |
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1855 if (!ef.specifies_noexecstack()) { |
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1856 if (!is_init_completed()) { |
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1857 os::Linux::_stack_is_executable = true; |
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1858 // This is OK - No Java threads have been created yet, and hence no |
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1859 // stack guard pages to fix. |
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1860 // |
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1861 // This should happen only when you are building JDK7 using a very |
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1862 // old version of JDK6 (e.g., with JPRT) and running test_gamma. |
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1863 // |
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1864 // Dynamic loader will make all stacks executable after |
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1865 // this function returns, and will not do that again. |
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1866 assert(Threads::first() == NULL, "no Java threads should exist yet."); |
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1867 } else { |
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1868 warning("You have loaded library %s which might have disabled stack guard. " |
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1869 "The VM will try to fix the stack guard now.\n" |
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1870 "It's highly recommended that you fix the library with " |
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1871 "'execstack -c <libfile>', or link it with '-z noexecstack'.", |
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1872 filename); |
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1873 |
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1874 assert(Thread::current()->is_Java_thread(), "must be Java thread"); |
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1875 JavaThread *jt = JavaThread::current(); |
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1876 if (jt->thread_state() != _thread_in_native) { |
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1877 // This happens when a compiler thread tries to load a hsdis-<arch>.so file |
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1878 // that requires ExecStack. Cannot enter safe point. Let's give up. |
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1879 warning("Unable to fix stack guard. Giving up."); |
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1880 } else { |
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1881 if (!LoadExecStackDllInVMThread) { |
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1882 // This is for the case where the DLL has an static |
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1883 // constructor function that executes JNI code. We cannot |
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1884 // load such DLLs in the VMThread. |
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1885 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1886 } |
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1887 |
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1888 ThreadInVMfromNative tiv(jt); |
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1889 debug_only(VMNativeEntryWrapper vew;) |
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1890 |
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1891 VM_LinuxDllLoad op(filename, ebuf, ebuflen); |
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1892 VMThread::execute(&op); |
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1893 if (LoadExecStackDllInVMThread) { |
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1894 result = op.loaded_library(); |
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1895 } |
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1896 load_attempted = true; |
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1897 } |
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1898 } |
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1899 } |
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1900 } |
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1901 |
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1902 if (!load_attempted) { |
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1903 result = os::Linux::dlopen_helper(filename, ebuf, ebuflen); |
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1904 } |
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1905 |
| 0 | 1906 if (result != NULL) { |
| 1907 // Successful loading | |
| 1908 return result; | |
| 1909 } | |
| 1910 | |
| 1911 Elf32_Ehdr elf_head; | |
| 1912 int diag_msg_max_length=ebuflen-strlen(ebuf); | |
| 1913 char* diag_msg_buf=ebuf+strlen(ebuf); | |
| 1914 | |
| 1915 if (diag_msg_max_length==0) { | |
| 1916 // No more space in ebuf for additional diagnostics message | |
| 1917 return NULL; | |
| 1918 } | |
| 1919 | |
| 1920 | |
| 1921 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); | |
| 1922 | |
| 1923 if (file_descriptor < 0) { | |
| 1924 // Can't open library, report dlerror() message | |
| 1925 return NULL; | |
| 1926 } | |
| 1927 | |
| 1928 bool failed_to_read_elf_head= | |
| 1929 (sizeof(elf_head)!= | |
| 1930 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; | |
| 1931 | |
| 1932 ::close(file_descriptor); | |
| 1933 if (failed_to_read_elf_head) { | |
| 1934 // file i/o error - report dlerror() msg | |
| 1935 return NULL; | |
| 1936 } | |
| 1937 | |
| 1938 typedef struct { | |
| 1939 Elf32_Half code; // Actual value as defined in elf.h | |
| 1940 Elf32_Half compat_class; // Compatibility of archs at VM's sense | |
| 1941 char elf_class; // 32 or 64 bit | |
| 1942 char endianess; // MSB or LSB | |
| 1943 char* name; // String representation | |
| 1944 } arch_t; | |
| 1945 | |
| 1946 #ifndef EM_486 | |
| 1947 #define EM_486 6 /* Intel 80486 */ | |
| 1948 #endif | |
| 1949 | |
| 1950 static const arch_t arch_array[]={ | |
| 1951 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1952 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, | |
| 1953 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, | |
| 1954 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, | |
| 1955 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1956 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, | |
| 1957 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, | |
| 1958 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, | |
| 1010 | 1959 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
| 1960 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, | |
| 1961 {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, | |
| 1962 {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, | |
| 1963 {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, | |
| 1964 {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, | |
| 1965 {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, | |
| 1966 {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} | |
| 0 | 1967 }; |
| 1968 | |
| 1969 #if (defined IA32) | |
| 1970 static Elf32_Half running_arch_code=EM_386; | |
| 1971 #elif (defined AMD64) | |
| 1972 static Elf32_Half running_arch_code=EM_X86_64; | |
| 1973 #elif (defined IA64) | |
| 1974 static Elf32_Half running_arch_code=EM_IA_64; | |
| 1975 #elif (defined __sparc) && (defined _LP64) | |
| 1976 static Elf32_Half running_arch_code=EM_SPARCV9; | |
| 1977 #elif (defined __sparc) && (!defined _LP64) | |
| 1978 static Elf32_Half running_arch_code=EM_SPARC; | |
| 1979 #elif (defined __powerpc64__) | |
| 1980 static Elf32_Half running_arch_code=EM_PPC64; | |
| 1981 #elif (defined __powerpc__) | |
| 1982 static Elf32_Half running_arch_code=EM_PPC; | |
| 1010 | 1983 #elif (defined ARM) |
| 1984 static Elf32_Half running_arch_code=EM_ARM; | |
| 1985 #elif (defined S390) | |
| 1986 static Elf32_Half running_arch_code=EM_S390; | |
| 1987 #elif (defined ALPHA) | |
| 1988 static Elf32_Half running_arch_code=EM_ALPHA; | |
| 1989 #elif (defined MIPSEL) | |
| 1990 static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; | |
| 1991 #elif (defined PARISC) | |
| 1992 static Elf32_Half running_arch_code=EM_PARISC; | |
| 1993 #elif (defined MIPS) | |
| 1994 static Elf32_Half running_arch_code=EM_MIPS; | |
| 1995 #elif (defined M68K) | |
| 1996 static Elf32_Half running_arch_code=EM_68K; | |
| 0 | 1997 #else |
| 1998 #error Method os::dll_load requires that one of following is defined:\ | |
| 1010 | 1999 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
| 0 | 2000 #endif |
| 2001 | |
| 2002 // Identify compatability class for VM's architecture and library's architecture | |
| 2003 // Obtain string descriptions for architectures | |
| 2004 | |
| 2005 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; | |
| 2006 int running_arch_index=-1; | |
| 2007 | |
| 2008 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { | |
| 2009 if (running_arch_code == arch_array[i].code) { | |
| 2010 running_arch_index = i; | |
| 2011 } | |
| 2012 if (lib_arch.code == arch_array[i].code) { | |
| 2013 lib_arch.compat_class = arch_array[i].compat_class; | |
| 2014 lib_arch.name = arch_array[i].name; | |
| 2015 } | |
| 2016 } | |
| 2017 | |
| 2018 assert(running_arch_index != -1, | |
| 2019 "Didn't find running architecture code (running_arch_code) in arch_array"); | |
| 2020 if (running_arch_index == -1) { | |
| 2021 // Even though running architecture detection failed | |
| 2022 // we may still continue with reporting dlerror() message | |
| 2023 return NULL; | |
| 2024 } | |
| 2025 | |
| 2026 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { | |
| 2027 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); | |
| 2028 return NULL; | |
| 2029 } | |
| 2030 | |
| 1010 | 2031 #ifndef S390 |
| 0 | 2032 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
| 2033 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); | |
| 2034 return NULL; | |
| 2035 } | |
| 1010 | 2036 #endif // !S390 |
| 0 | 2037 |
| 2038 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { | |
| 2039 if ( lib_arch.name!=NULL ) { | |
| 2040 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2041 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", | |
| 2042 lib_arch.name, arch_array[running_arch_index].name); | |
| 2043 } else { | |
| 2044 ::snprintf(diag_msg_buf, diag_msg_max_length-1, | |
| 2045 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", | |
| 2046 lib_arch.code, | |
| 2047 arch_array[running_arch_index].name); | |
| 2048 } | |
| 2049 } | |
| 2050 | |
| 2051 return NULL; | |
| 2052 } | |
| 2053 | |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
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|
2054 void * os::Linux::dlopen_helper(const char *filename, char *ebuf, int ebuflen) { |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
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8711
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|
2055 void * result = ::dlopen(filename, RTLD_LAZY); |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
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8711
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|
2056 if (result == NULL) { |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
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8711
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|
2057 ::strncpy(ebuf, ::dlerror(), ebuflen - 1); |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
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8711
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|
2058 ebuf[ebuflen-1] = '\0'; |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
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8711
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|
2059 } |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2060 return result; |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2061 } |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2062 |
|
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
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8711
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changeset
|
2063 void * os::Linux::dll_load_in_vmthread(const char *filename, char *ebuf, int ebuflen) { |
|
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
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|
2064 void * result = NULL; |
|
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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|
2065 if (LoadExecStackDllInVMThread) { |
|
8812
14509df4cd63
8010389: After fix for 7107135 a failed dlopen() call results in a VM crash
iklam
parents:
8711
diff
changeset
|
2066 result = dlopen_helper(filename, ebuf, ebuflen); |
|
8710
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
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|
2067 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2068 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2069 // Since 7019808, libjvm.so is linked with -noexecstack. If the VM loads a |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2070 // library that requires an executable stack, or which does not have this |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2071 // stack attribute set, dlopen changes the stack attribute to executable. The |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2072 // read protection of the guard pages gets lost. |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
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|
2073 // |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2074 // Need to check _stack_is_executable again as multiple VM_LinuxDllLoad |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2075 // may have been queued at the same time. |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2076 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2077 if (!_stack_is_executable) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2078 JavaThread *jt = Threads::first(); |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2079 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2080 while (jt) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2081 if (!jt->stack_guard_zone_unused() && // Stack not yet fully initialized |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2082 jt->stack_yellow_zone_enabled()) { // No pending stack overflow exceptions |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2083 if (!os::guard_memory((char *) jt->stack_red_zone_base() - jt->stack_red_zone_size(), |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2084 jt->stack_yellow_zone_size() + jt->stack_red_zone_size())) { |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2085 warning("Attempt to reguard stack yellow zone failed."); |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2086 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2087 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2088 jt = jt->next(); |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2089 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2090 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2091 |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2092 return result; |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2093 } |
|
9058789475af
7107135: Stack guard pages are no more protected after loading a shared library with executable stack
iklam
parents:
8675
diff
changeset
|
2094 |
| 242 | 2095 /* |
| 2096 * glibc-2.0 libdl is not MT safe. If you are building with any glibc, | |
| 2097 * chances are you might want to run the generated bits against glibc-2.0 | |
| 2098 * libdl.so, so always use locking for any version of glibc. | |
| 2099 */ | |
| 2100 void* os::dll_lookup(void* handle, const char* name) { | |
| 2101 pthread_mutex_lock(&dl_mutex); | |
| 2102 void* res = dlsym(handle, name); | |
| 2103 pthread_mutex_unlock(&dl_mutex); | |
| 2104 return res; | |
| 2105 } | |
| 0 | 2106 |
| 2107 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2108 static bool _print_ascii_file(const char* filename, outputStream* st) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2109 int fd = ::open(filename, O_RDONLY); |
| 0 | 2110 if (fd == -1) { |
| 2111 return false; | |
| 2112 } | |
| 2113 | |
| 2114 char buf[32]; | |
| 2115 int bytes; | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2116 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
| 0 | 2117 st->print_raw(buf, bytes); |
| 2118 } | |
| 2119 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2120 ::close(fd); |
| 0 | 2121 |
| 2122 return true; | |
| 2123 } | |
| 2124 | |
| 2125 void os::print_dll_info(outputStream *st) { | |
| 2126 st->print_cr("Dynamic libraries:"); | |
| 2127 | |
| 2128 char fname[32]; | |
| 2129 pid_t pid = os::Linux::gettid(); | |
| 2130 | |
| 2131 jio_snprintf(fname, sizeof(fname), "/proc/%d/maps", pid); | |
| 2132 | |
| 2133 if (!_print_ascii_file(fname, st)) { | |
| 2134 st->print("Can not get library information for pid = %d\n", pid); | |
| 2135 } | |
| 2136 } | |
| 2137 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2138 void os::print_os_info_brief(outputStream* st) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2139 os::Linux::print_distro_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2140 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2141 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2142 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2143 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2144 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2145 } |
| 0 | 2146 |
| 2147 void os::print_os_info(outputStream* st) { | |
| 2148 st->print("OS:"); | |
| 2149 | |
|
6080
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2150 os::Linux::print_distro_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2151 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2152 os::Posix::print_uname_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2153 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2154 // Print warning if unsafe chroot environment detected |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2155 if (unsafe_chroot_detected) { |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2156 st->print("WARNING!! "); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2157 st->print_cr(unstable_chroot_error); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2158 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2159 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2160 os::Linux::print_libversion_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2161 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2162 os::Posix::print_rlimit_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2163 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2164 os::Posix::print_load_average(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2165 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2166 os::Linux::print_full_memory_info(st); |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2167 } |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2168 |
|
7432b9db36ff
7165755: OS Information much longer on linux than other platforms
nloodin
parents:
5937
diff
changeset
|
2169 // 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
|
2170 // 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
|
2171 // 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
|
2172 // 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
|
2173 // /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
|
2174 // /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
|
2175 // 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
|
2176 // 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
|
2177 // 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
|
2178 // redhat-release file. |
|
4472884d8b37
6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
dcubed
parents:
12211
diff
changeset
|
2179 // 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
|
2180 // 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
|
2181 // 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
|
2182 // 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
|
2183 // 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
|
2184 // 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
|
2185 // 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
|
2186 // 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
|
2187 // 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
|
2188 // 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
|
2189 // "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
|
2190 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
|
2191 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
|
2192 !_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
|
2193 !_print_ascii_file("/etc/mandrake-release", st) && |
|
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|
2194 !_print_ascii_file("/etc/sun-release", st) && |
|
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|
2195 !_print_ascii_file("/etc/redhat-release", st) && |
|
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2196 !_print_ascii_file("/etc/lsb-release", st) && |
|
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|
2197 !_print_ascii_file("/etc/SuSE-release", st) && |
|
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|
2198 !_print_ascii_file("/etc/turbolinux-release", st) && |
|
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|
2199 !_print_ascii_file("/etc/gentoo-release", st) && |
|
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|
2200 !_print_ascii_file("/etc/ltib-release", st) && |
|
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|
2201 !_print_ascii_file("/etc/angstrom-version", st) && |
|
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|
2202 !_print_ascii_file("/etc/system-release", st) && |
|
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2203 !_print_ascii_file("/etc/os-release", st)) { |
|
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6986195: correctly identify Ubuntu as the operating system in crash report instead of "Debian"
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|
2204 |
|
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|
2205 if (file_exists("/etc/debian_version")) { |
|
4472884d8b37
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|
2206 st->print("Debian "); |
|
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|
2207 _print_ascii_file("/etc/debian_version", st); |
|
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|
2208 } else { |
|
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|
2209 st->print("Linux"); |
|
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|
2210 } |
|
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|
2211 } |
|
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|
2212 st->cr(); |
|
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|
2213 } |
|
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|
2214 |
|
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|
2215 void os::Linux::print_libversion_info(outputStream* st) { |
| 0 | 2216 // libc, pthread |
| 2217 st->print("libc:"); | |
| 2218 st->print(os::Linux::glibc_version()); st->print(" "); | |
| 2219 st->print(os::Linux::libpthread_version()); st->print(" "); | |
| 2220 if (os::Linux::is_LinuxThreads()) { | |
| 2221 st->print("(%s stack)", os::Linux::is_floating_stack() ? "floating" : "fixed"); | |
| 2222 } | |
| 2223 st->cr(); | |
|
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|
2224 } |
|
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|
2225 |
|
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|
2226 void os::Linux::print_full_memory_info(outputStream* st) { |
|
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|
2227 st->print("\n/proc/meminfo:\n"); |
|
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|
2228 _print_ascii_file("/proc/meminfo", st); |
|
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|
2229 st->cr(); |
|
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|
2230 } |
|
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|
2231 |
| 0 | 2232 void os::print_memory_info(outputStream* st) { |
| 2233 | |
| 2234 st->print("Memory:"); | |
| 2235 st->print(" %dk page", os::vm_page_size()>>10); | |
| 2236 | |
| 2237 // values in struct sysinfo are "unsigned long" | |
| 2238 struct sysinfo si; | |
| 2239 sysinfo(&si); | |
| 2240 | |
| 2241 st->print(", physical " UINT64_FORMAT "k", | |
| 2242 os::physical_memory() >> 10); | |
| 2243 st->print("(" UINT64_FORMAT "k free)", | |
| 2244 os::available_memory() >> 10); | |
| 2245 st->print(", swap " UINT64_FORMAT "k", | |
| 2246 ((jlong)si.totalswap * si.mem_unit) >> 10); | |
| 2247 st->print("(" UINT64_FORMAT "k free)", | |
| 2248 ((jlong)si.freeswap * si.mem_unit) >> 10); | |
| 2249 st->cr(); | |
| 2250 } | |
| 2251 | |
|
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|
2252 void os::pd_print_cpu_info(outputStream* st) { |
|
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|
2253 st->print("\n/proc/cpuinfo:\n"); |
|
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|
2254 if (!_print_ascii_file("/proc/cpuinfo", st)) { |
|
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|
2255 st->print(" <Not Available>"); |
|
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|
2256 } |
|
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|
2257 st->cr(); |
|
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|
2258 } |
|
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|
2259 |
| 0 | 2260 // Taken from /usr/include/bits/siginfo.h Supposed to be architecture specific |
| 2261 // but they're the same for all the linux arch that we support | |
| 2262 // and they're the same for solaris but there's no common place to put this. | |
| 2263 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", | |
| 2264 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", | |
| 2265 "ILL_COPROC", "ILL_BADSTK" }; | |
| 2266 | |
| 2267 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", | |
| 2268 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", | |
| 2269 "FPE_FLTINV", "FPE_FLTSUB", "FPE_FLTDEN" }; | |
| 2270 | |
| 2271 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; | |
| 2272 | |
| 2273 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; | |
| 2274 | |
| 2275 void os::print_siginfo(outputStream* st, void* siginfo) { | |
| 2276 st->print("siginfo:"); | |
| 2277 | |
| 2278 const int buflen = 100; | |
| 2279 char buf[buflen]; | |
| 2280 siginfo_t *si = (siginfo_t*)siginfo; | |
| 2281 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); | |
| 2282 if (si->si_errno != 0 && strerror_r(si->si_errno, buf, buflen) == 0) { | |
| 2283 st->print("si_errno=%s", buf); | |
| 2284 } else { | |
| 2285 st->print("si_errno=%d", si->si_errno); | |
| 2286 } | |
| 2287 const int c = si->si_code; | |
| 2288 assert(c > 0, "unexpected si_code"); | |
| 2289 switch (si->si_signo) { | |
| 2290 case SIGILL: | |
| 2291 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); | |
| 2292 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2293 break; | |
| 2294 case SIGFPE: | |
| 2295 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); | |
| 2296 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2297 break; | |
| 2298 case SIGSEGV: | |
| 2299 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); | |
| 2300 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2301 break; | |
| 2302 case SIGBUS: | |
| 2303 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); | |
| 2304 st->print(", si_addr=" PTR_FORMAT, si->si_addr); | |
| 2305 break; | |
| 2306 default: | |
| 2307 st->print(", si_code=%d", si->si_code); | |
| 2308 // no si_addr | |
| 2309 } | |
| 2310 | |
| 2311 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && | |
| 2312 UseSharedSpaces) { | |
| 2313 FileMapInfo* mapinfo = FileMapInfo::current_info(); | |
| 2314 if (mapinfo->is_in_shared_space(si->si_addr)) { | |
| 2315 st->print("\n\nError accessing class data sharing archive." \ | |
| 2316 " Mapped file inaccessible during execution, " \ | |
| 2317 " possible disk/network problem."); | |
| 2318 } | |
| 2319 } | |
| 2320 st->cr(); | |
| 2321 } | |
| 2322 | |
| 2323 | |
| 2324 static void print_signal_handler(outputStream* st, int sig, | |
| 2325 char* buf, size_t buflen); | |
| 2326 | |
| 2327 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { | |
| 2328 st->print_cr("Signal Handlers:"); | |
| 2329 print_signal_handler(st, SIGSEGV, buf, buflen); | |
| 2330 print_signal_handler(st, SIGBUS , buf, buflen); | |
| 2331 print_signal_handler(st, SIGFPE , buf, buflen); | |
| 2332 print_signal_handler(st, SIGPIPE, buf, buflen); | |
| 2333 print_signal_handler(st, SIGXFSZ, buf, buflen); | |
| 2334 print_signal_handler(st, SIGILL , buf, buflen); | |
| 2335 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); | |
| 2336 print_signal_handler(st, SR_signum, buf, buflen); | |
| 2337 print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); | |
| 2338 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); | |
| 2339 print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); | |
| 2340 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); | |
| 2341 } | |
| 2342 | |
| 2343 static char saved_jvm_path[MAXPATHLEN] = {0}; | |
| 2344 | |
|
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|
2345 // Find the full path to the current module, libjvm.so |
| 1642 | 2346 void os::jvm_path(char *buf, jint buflen) { |
| 0 | 2347 // Error checking. |
| 1642 | 2348 if (buflen < MAXPATHLEN) { |
| 0 | 2349 assert(false, "must use a large-enough buffer"); |
| 2350 buf[0] = '\0'; | |
| 2351 return; | |
| 2352 } | |
| 2353 // Lazy resolve the path to current module. | |
| 2354 if (saved_jvm_path[0] != 0) { | |
| 2355 strcpy(buf, saved_jvm_path); | |
| 2356 return; | |
| 2357 } | |
| 2358 | |
| 2359 char dli_fname[MAXPATHLEN]; | |
| 2360 bool ret = dll_address_to_library_name( | |
| 2361 CAST_FROM_FN_PTR(address, os::jvm_path), | |
| 2362 dli_fname, sizeof(dli_fname), NULL); | |
|
11092
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|
2363 assert(ret, "cannot locate libjvm"); |
|
59b052799158
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|
2364 char *rp = NULL; |
|
59b052799158
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|
2365 if (ret && dli_fname[0] != '\0') { |
|
59b052799158
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|
2366 rp = realpath(dli_fname, buf); |
|
59b052799158
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|
2367 } |
|
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|
2368 if (rp == NULL) |
|
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|
2369 return; |
| 0 | 2370 |
|
2302
da091bb67459
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2204
diff
changeset
|
2371 if (Arguments::created_by_gamma_launcher()) { |
| 0 | 2372 // Support for the gamma launcher. Typical value for buf is |
| 2373 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at | |
| 2374 // the right place in the string, then assume we are installed in a JDK and | |
| 2375 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix | |
| 2376 // up the path so it looks like libjvm.so is installed there (append a | |
| 2377 // fake suffix hotspot/libjvm.so). | |
| 2378 const char *p = buf + strlen(buf) - 1; | |
| 2379 for (int count = 0; p > buf && count < 5; ++count) { | |
| 2380 for (--p; p > buf && *p != '/'; --p) | |
| 2381 /* empty */ ; | |
| 2382 } | |
| 2383 | |
| 2384 if (strncmp(p, "/jre/lib/", 9) != 0) { | |
| 2385 // Look for JAVA_HOME in the environment. | |
| 2386 char* java_home_var = ::getenv("JAVA_HOME"); | |
| 2387 if (java_home_var != NULL && java_home_var[0] != 0) { | |
| 1642 | 2388 char* jrelib_p; |
| 2389 int len; | |
| 2390 | |
|
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|
2391 // Check the current module name "libjvm.so". |
| 0 | 2392 p = strrchr(buf, '/'); |
| 2393 assert(strstr(p, "/libjvm") == p, "invalid library name"); | |
| 2394 | |
|
1681
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|
2395 rp = realpath(java_home_var, buf); |
|
126ea7725993
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|
2396 if (rp == NULL) |
|
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|
2397 return; |
| 1642 | 2398 |
| 2399 // determine if this is a legacy image or modules image | |
| 2400 // modules image doesn't have "jre" subdirectory | |
| 2401 len = strlen(buf); | |
| 2402 jrelib_p = buf + len; | |
| 2403 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); | |
| 2404 if (0 != access(buf, F_OK)) { | |
| 2405 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); | |
| 2406 } | |
| 2407 | |
| 0 | 2408 if (0 == access(buf, F_OK)) { |
|
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|
2409 // Use current module name "libjvm.so" |
| 1642 | 2410 len = strlen(buf); |
|
7456
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|
2411 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); |
| 0 | 2412 } else { |
| 2413 // Go back to path of .so | |
|
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|
2414 rp = realpath(dli_fname, buf); |
|
126ea7725993
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bobv
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|
2415 if (rp == NULL) |
|
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|
2416 return; |
| 0 | 2417 } |
| 2418 } | |
| 2419 } | |
| 2420 } | |
| 2421 | |
| 2422 strcpy(saved_jvm_path, buf); | |
| 2423 } | |
| 2424 | |
| 2425 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { | |
| 2426 // no prefix required, not even "_" | |
| 2427 } | |
| 2428 | |
| 2429 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { | |
| 2430 // no suffix required | |
| 2431 } | |
| 2432 | |
| 2433 //////////////////////////////////////////////////////////////////////////////// | |
| 2434 // sun.misc.Signal support | |
| 2435 | |
| 2436 static volatile jint sigint_count = 0; | |
| 2437 | |
| 2438 static void | |
| 2439 UserHandler(int sig, void *siginfo, void *context) { | |
| 2440 // 4511530 - sem_post is serialized and handled by the manager thread. When | |
| 2441 // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We | |
| 2442 // don't want to flood the manager thread with sem_post requests. | |
| 2443 if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) | |
| 2444 return; | |
| 2445 | |
| 2446 // Ctrl-C is pressed during error reporting, likely because the error | |
| 2447 // handler fails to abort. Let VM die immediately. | |
| 2448 if (sig == SIGINT && is_error_reported()) { | |
| 2449 os::die(); | |
| 2450 } | |
| 2451 | |
| 2452 os::signal_notify(sig); | |
| 2453 } | |
| 2454 | |
| 2455 void* os::user_handler() { | |
| 2456 return CAST_FROM_FN_PTR(void*, UserHandler); | |
| 2457 } | |
| 2458 | |
| 10405 | 2459 class Semaphore : public StackObj { |
| 2460 public: | |
| 2461 Semaphore(); | |
| 2462 ~Semaphore(); | |
| 2463 void signal(); | |
| 2464 void wait(); | |
| 2465 bool trywait(); | |
| 2466 bool timedwait(unsigned int sec, int nsec); | |
| 2467 private: | |
| 2468 sem_t _semaphore; | |
| 2469 }; | |
| 2470 | |
| 2471 | |
| 2472 Semaphore::Semaphore() { | |
| 2473 sem_init(&_semaphore, 0, 0); | |
| 2474 } | |
| 2475 | |
| 2476 Semaphore::~Semaphore() { | |
| 2477 sem_destroy(&_semaphore); | |
| 2478 } | |
| 2479 | |
| 2480 void Semaphore::signal() { | |
| 2481 sem_post(&_semaphore); | |
| 2482 } | |
| 2483 | |
| 2484 void Semaphore::wait() { | |
| 2485 sem_wait(&_semaphore); | |
| 2486 } | |
| 2487 | |
| 2488 bool Semaphore::trywait() { | |
| 2489 return sem_trywait(&_semaphore) == 0; | |
| 2490 } | |
| 2491 | |
| 2492 bool Semaphore::timedwait(unsigned int sec, int nsec) { | |
| 2493 struct timespec ts; | |
| 2494 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); | |
| 2495 | |
| 2496 while (1) { | |
| 2497 int result = sem_timedwait(&_semaphore, &ts); | |
| 2498 if (result == 0) { | |
| 2499 return true; | |
| 2500 } else if (errno == EINTR) { | |
| 2501 continue; | |
| 2502 } else if (errno == ETIMEDOUT) { | |
| 2503 return false; | |
| 2504 } else { | |
| 2505 return false; | |
| 2506 } | |
| 2507 } | |
| 2508 } | |
| 2509 | |
| 0 | 2510 extern "C" { |
| 2511 typedef void (*sa_handler_t)(int); | |
| 2512 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); | |
| 2513 } | |
| 2514 | |
| 2515 void* os::signal(int signal_number, void* handler) { | |
| 2516 struct sigaction sigAct, oldSigAct; | |
| 2517 | |
| 2518 sigfillset(&(sigAct.sa_mask)); | |
| 2519 sigAct.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 2520 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); | |
| 2521 | |
| 2522 if (sigaction(signal_number, &sigAct, &oldSigAct)) { | |
| 2523 // -1 means registration failed | |
| 2524 return (void *)-1; | |
| 2525 } | |
| 2526 | |
| 2527 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); | |
| 2528 } | |
| 2529 | |
| 2530 void os::signal_raise(int signal_number) { | |
| 2531 ::raise(signal_number); | |
| 2532 } | |
| 2533 | |
| 2534 /* | |
| 2535 * The following code is moved from os.cpp for making this | |
| 2536 * code platform specific, which it is by its very nature. | |
| 2537 */ | |
| 2538 | |
| 2539 // Will be modified when max signal is changed to be dynamic | |
| 2540 int os::sigexitnum_pd() { | |
| 2541 return NSIG; | |
| 2542 } | |
| 2543 | |
| 2544 // a counter for each possible signal value | |
| 2545 static volatile jint pending_signals[NSIG+1] = { 0 }; | |
| 2546 | |
| 2547 // Linux(POSIX) specific hand shaking semaphore. | |
| 2548 static sem_t sig_sem; | |
| 10405 | 2549 static Semaphore sr_semaphore; |
| 0 | 2550 |
| 2551 void os::signal_init_pd() { | |
| 2552 // Initialize signal structures | |
| 2553 ::memset((void*)pending_signals, 0, sizeof(pending_signals)); | |
| 2554 | |
| 2555 // Initialize signal semaphore | |
| 2556 ::sem_init(&sig_sem, 0, 0); | |
| 2557 } | |
| 2558 | |
| 2559 void os::signal_notify(int sig) { | |
| 2560 Atomic::inc(&pending_signals[sig]); | |
| 2561 ::sem_post(&sig_sem); | |
| 2562 } | |
| 2563 | |
| 2564 static int check_pending_signals(bool wait) { | |
| 2565 Atomic::store(0, &sigint_count); | |
| 2566 for (;;) { | |
| 2567 for (int i = 0; i < NSIG + 1; i++) { | |
| 2568 jint n = pending_signals[i]; | |
| 2569 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { | |
| 2570 return i; | |
| 2571 } | |
| 2572 } | |
| 2573 if (!wait) { | |
| 2574 return -1; | |
| 2575 } | |
| 2576 JavaThread *thread = JavaThread::current(); | |
| 2577 ThreadBlockInVM tbivm(thread); | |
| 2578 | |
| 2579 bool threadIsSuspended; | |
| 2580 do { | |
| 2581 thread->set_suspend_equivalent(); | |
| 2582 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 2583 ::sem_wait(&sig_sem); | |
| 2584 | |
| 2585 // were we externally suspended while we were waiting? | |
| 2586 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); | |
| 2587 if (threadIsSuspended) { | |
| 2588 // | |
| 2589 // The semaphore has been incremented, but while we were waiting | |
| 2590 // another thread suspended us. We don't want to continue running | |
| 2591 // while suspended because that would surprise the thread that | |
| 2592 // suspended us. | |
| 2593 // | |
| 2594 ::sem_post(&sig_sem); | |
| 2595 | |
| 2596 thread->java_suspend_self(); | |
| 2597 } | |
| 2598 } while (threadIsSuspended); | |
| 2599 } | |
| 2600 } | |
| 2601 | |
| 2602 int os::signal_lookup() { | |
| 2603 return check_pending_signals(false); | |
| 2604 } | |
| 2605 | |
| 2606 int os::signal_wait() { | |
| 2607 return check_pending_signals(true); | |
| 2608 } | |
| 2609 | |
| 2610 //////////////////////////////////////////////////////////////////////////////// | |
| 2611 // Virtual Memory | |
| 2612 | |
| 2613 int os::vm_page_size() { | |
| 2614 // Seems redundant as all get out | |
| 2615 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2616 return os::Linux::page_size(); | |
| 2617 } | |
| 2618 | |
| 2619 // Solaris allocates memory by pages. | |
| 2620 int os::vm_allocation_granularity() { | |
| 2621 assert(os::Linux::page_size() != -1, "must call os::init"); | |
| 2622 return os::Linux::page_size(); | |
| 2623 } | |
| 2624 | |
| 2625 // Rationale behind this function: | |
| 2626 // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable | |
| 2627 // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get | |
| 2628 // samples for JITted code. Here we create private executable mapping over the code cache | |
| 2629 // and then we can use standard (well, almost, as mapping can change) way to provide | |
| 2630 // info for the reporting script by storing timestamp and location of symbol | |
| 2631 void linux_wrap_code(char* base, size_t size) { | |
| 2632 static volatile jint cnt = 0; | |
| 2633 | |
| 2634 if (!UseOprofile) { | |
| 2635 return; | |
| 2636 } | |
| 2637 | |
|
1497
96d554193f72
6944822: Fix for 6938627 exposes problem with hard-coded buffer sizes
coleenp
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1353
diff
changeset
|
2638 char buf[PATH_MAX+1]; |
| 0 | 2639 int num = Atomic::add(1, &cnt); |
| 2640 | |
|
1353
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
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1325
diff
changeset
|
2641 snprintf(buf, sizeof(buf), "%s/hs-vm-%d-%d", |
|
a2ea687fdc7c
6938627: Make temporary directory use property java.io.tmpdir when specified
coleenp
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1325
diff
changeset
|
2642 os::get_temp_directory(), os::current_process_id(), num); |
| 0 | 2643 unlink(buf); |
| 2644 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2645 int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
| 0 | 2646 |
| 2647 if (fd != -1) { | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
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1972
diff
changeset
|
2648 off_t rv = ::lseek(fd, size-2, SEEK_SET); |
| 0 | 2649 if (rv != (off_t)-1) { |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2650 if (::write(fd, "", 1) == 1) { |
| 0 | 2651 mmap(base, size, |
| 2652 PROT_READ|PROT_WRITE|PROT_EXEC, | |
| 2653 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); | |
| 2654 } | |
| 2655 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
2656 ::close(fd); |
| 0 | 2657 unlink(buf); |
| 2658 } | |
| 2659 } | |
| 2660 | |
|
10969
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|
2661 static bool recoverable_mmap_error(int err) { |
|
a837fa3d3f86
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diff
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|
2662 // See if the error is one we can let the caller handle. This |
|
a837fa3d3f86
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|
2663 // list of errno values comes from JBS-6843484. I can't find a |
|
a837fa3d3f86
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|
2664 // Linux man page that documents this specific set of errno |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2665 // values so while this list currently matches Solaris, it may |
|
a837fa3d3f86
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diff
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|
2666 // change as we gain experience with this failure mode. |
|
a837fa3d3f86
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|
2667 switch (err) { |
|
a837fa3d3f86
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|
2668 case EBADF: |
|
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|
2669 case EINVAL: |
|
a837fa3d3f86
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|
2670 case ENOTSUP: |
|
a837fa3d3f86
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|
2671 // let the caller deal with these errors |
|
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|
2672 return true; |
|
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|
2673 |
|
a837fa3d3f86
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|
2674 default: |
|
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|
2675 // Any remaining errors on this OS can cause our reserved mapping |
|
a837fa3d3f86
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|
2676 // to be lost. That can cause confusion where different data |
|
a837fa3d3f86
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|
2677 // structures think they have the same memory mapped. The worst |
|
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|
2678 // scenario is if both the VM and a library think they have the |
|
a837fa3d3f86
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|
2679 // same memory mapped. |
|
a837fa3d3f86
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|
2680 return false; |
|
a837fa3d3f86
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|
2681 } |
|
a837fa3d3f86
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|
2682 } |
|
a837fa3d3f86
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|
2683 |
|
a837fa3d3f86
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|
2684 static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
|
a837fa3d3f86
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|
2685 int err) { |
|
a837fa3d3f86
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|
2686 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
|
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diff
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|
2687 ", %d) failed; error='%s' (errno=%d)", addr, size, exec, |
|
a837fa3d3f86
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|
2688 strerror(err), err); |
|
a837fa3d3f86
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|
2689 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2690 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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changeset
|
2691 static void warn_fail_commit_memory(char* addr, size_t size, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2692 size_t alignment_hint, bool exec, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2693 int err) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
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|
2694 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2695 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, size, |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2696 alignment_hint, exec, strerror(err), err); |
|
a837fa3d3f86
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|
2697 } |
|
a837fa3d3f86
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diff
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|
2698 |
| 0 | 2699 // NOTE: Linux kernel does not really reserve the pages for us. |
| 2700 // All it does is to check if there are enough free pages | |
| 2701 // left at the time of mmap(). This could be a potential | |
| 2702 // problem. | |
|
10969
a837fa3d3f86
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changeset
|
2703 int os::Linux::commit_memory_impl(char* addr, size_t size, bool exec) { |
| 656 | 2704 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
| 2705 uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, | |
| 0 | 2706 MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
| 3885 | 2707 if (res != (uintptr_t) MAP_FAILED) { |
| 2708 if (UseNUMAInterleaving) { | |
| 2709 numa_make_global(addr, size); | |
| 2710 } | |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2711 return 0; |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
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|
2712 } |
|
a837fa3d3f86
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10405
diff
changeset
|
2713 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2714 int err = errno; // save errno from mmap() call above |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2715 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2716 if (!recoverable_mmap_error(err)) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2717 warn_fail_commit_memory(addr, size, exec, err); |
|
a837fa3d3f86
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10405
diff
changeset
|
2718 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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10405
diff
changeset
|
2719 } |
|
a837fa3d3f86
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10405
diff
changeset
|
2720 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2721 return err; |
|
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 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2724 bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2725 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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diff
changeset
|
2726 } |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2727 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2728 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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diff
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|
2729 const char* mesg) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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10405
diff
changeset
|
2730 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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diff
changeset
|
2731 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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diff
changeset
|
2732 if (err != 0) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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diff
changeset
|
2733 // 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
|
2734 warn_fail_commit_memory(addr, size, exec, err); |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2735 vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2736 } |
| 0 | 2737 } |
| 2738 | |
|
3286
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|
2739 // Define MAP_HUGETLB here so we can build HotSpot on old systems. |
|
139667d9836a
7034464: Support transparent large pages on Linux
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|
2740 #ifndef MAP_HUGETLB |
|
139667d9836a
7034464: Support transparent large pages on Linux
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diff
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|
2741 #define MAP_HUGETLB 0x40000 |
|
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7034464: Support transparent large pages on Linux
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diff
changeset
|
2742 #endif |
|
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changeset
|
2743 |
|
139667d9836a
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changeset
|
2744 // Define MADV_HUGEPAGE here so we can build HotSpot on old systems. |
|
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|
2745 #ifndef MADV_HUGEPAGE |
|
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|
2746 #define MADV_HUGEPAGE 14 |
|
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|
2747 #endif |
|
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|
2748 |
|
10969
a837fa3d3f86
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|
2749 int os::Linux::commit_memory_impl(char* addr, size_t size, |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2750 size_t alignment_hint, bool exec) { |
|
12110
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|
2751 int err = os::Linux::commit_memory_impl(addr, size, exec); |
|
10969
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|
2752 if (err == 0) { |
|
3913
27702f012017
7087583: Hotspot fails to allocate heap with mmap(MAP_HUGETLB)
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|
2753 realign_memory(addr, size, alignment_hint); |
|
10969
a837fa3d3f86
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|
2754 } |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2755 return err; |
|
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 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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|
2759 bool exec) { |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2760 return os::Linux::commit_memory_impl(addr, size, alignment_hint, exec) == 0; |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2761 } |
|
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|
2762 |
|
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2763 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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|
2764 size_t alignment_hint, bool exec, |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2765 const char* mesg) { |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2766 assert(mesg != NULL, "mesg must be specified"); |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2767 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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|
2768 if (err != 0) { |
|
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|
2769 // 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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|
2770 warn_fail_commit_memory(addr, size, alignment_hint, exec, err); |
|
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8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
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|
2771 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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|
2772 } |
| 0 | 2773 } |
| 2774 | |
| 6197 | 2775 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
|
12110
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|
2776 if (UseTransparentHugePages && alignment_hint > (size_t)vm_page_size()) { |
|
3286
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|
2777 // We don't check the return value: madvise(MADV_HUGEPAGE) may not |
|
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|
2778 // be supported or the memory may already be backed by huge pages. |
|
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|
2779 ::madvise(addr, bytes, MADV_HUGEPAGE); |
|
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|
2780 } |
|
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|
2781 } |
| 141 | 2782 |
| 6197 | 2783 void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
|
5937
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7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
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diff
changeset
|
2784 // This method works by doing an mmap over an existing mmaping and effectively discarding |
|
cf956638b844
7151089: PS NUMA: NUMA allocator should not attempt to free pages when using SHM large pages
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5909
diff
changeset
|
2785 // the existing pages. However it won't work for SHM-based large pages that cannot be |
|
cf956638b844
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5909
diff
changeset
|
2786 // 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
|
2787 // 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
|
2788 // allow that in any case. |
|
12110
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|
2789 if (alignment_hint <= (size_t)os::vm_page_size() || can_commit_large_page_memory()) { |
|
10969
a837fa3d3f86
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changeset
|
2790 commit_memory(addr, bytes, alignment_hint, !ExecMem); |
|
5937
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|
2791 } |
| 141 | 2792 } |
| 2793 | |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
changeset
|
2794 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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changeset
|
2795 Linux::numa_interleave_memory(addr, bytes); |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2796 } |
| 141 | 2797 |
|
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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diff
changeset
|
2798 // 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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11092
diff
changeset
|
2799 // bind policy to MPOL_PREFERRED for the current thread. |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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diff
changeset
|
2800 #define USE_MPOL_PREFERRED 0 |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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diff
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|
2801 |
| 141 | 2802 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
|
12176
88c255656030
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11092
diff
changeset
|
2803 // 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
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11092
diff
changeset
|
2804 // 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
|
2805 // 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
|
2806 // 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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11092
diff
changeset
|
2807 // 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
|
2808 // 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
|
2809 // free large pages. |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
mgerdin
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11092
diff
changeset
|
2810 Linux::numa_set_bind_policy(USE_MPOL_PREFERRED); |
| 141 | 2811 Linux::numa_tonode_memory(addr, bytes, lgrp_hint); |
| 2812 } | |
| 2813 | |
| 2814 bool os::numa_topology_changed() { return false; } | |
| 2815 | |
| 2816 size_t os::numa_get_groups_num() { | |
| 2817 int max_node = Linux::numa_max_node(); | |
| 2818 return max_node > 0 ? max_node + 1 : 1; | |
| 2819 } | |
| 2820 | |
| 2821 int os::numa_get_group_id() { | |
| 2822 int cpu_id = Linux::sched_getcpu(); | |
| 2823 if (cpu_id != -1) { | |
| 2824 int lgrp_id = Linux::get_node_by_cpu(cpu_id); | |
| 2825 if (lgrp_id != -1) { | |
| 2826 return lgrp_id; | |
| 2827 } | |
| 0 | 2828 } |
| 2829 return 0; | |
| 2830 } | |
| 2831 | |
| 141 | 2832 size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
| 2833 for (size_t i = 0; i < size; i++) { | |
| 2834 ids[i] = i; | |
| 2835 } | |
| 2836 return size; | |
| 2837 } | |
| 2838 | |
| 0 | 2839 bool os::get_page_info(char *start, page_info* info) { |
| 2840 return false; | |
| 2841 } | |
| 2842 | |
| 2843 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { | |
| 2844 return end; | |
| 2845 } | |
| 2846 | |
| 3826 | 2847 |
| 2848 int os::Linux::sched_getcpu_syscall(void) { | |
| 2849 unsigned int cpu; | |
| 2850 int retval = -1; | |
| 2851 | |
| 2852 #if defined(IA32) | |
|
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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3885
diff
changeset
|
2853 # ifndef SYS_getcpu |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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diff
changeset
|
2854 # define SYS_getcpu 318 |
|
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7082645: Hotspot doesn't compile on old linuxes after 7060836
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diff
changeset
|
2855 # endif |
| 3826 | 2856 retval = syscall(SYS_getcpu, &cpu, NULL, NULL); |
| 2857 #elif defined(AMD64) | |
|
3887
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
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3885
diff
changeset
|
2858 // 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
|
2859 // 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
|
2860 # define __NR_vgetcpu 2 |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
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3885
diff
changeset
|
2861 # define VSYSCALL_START (-10UL << 20) |
|
9447b2fb6fcf
7082645: Hotspot doesn't compile on old linuxes after 7060836
iveresov
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3885
diff
changeset
|
2862 # define VSYSCALL_SIZE 1024 |
|
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7082645: Hotspot doesn't compile on old linuxes after 7060836
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3885
diff
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|
2863 # define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr)) |
| 3826 | 2864 typedef long (*vgetcpu_t)(unsigned int *cpu, unsigned int *node, unsigned long *tcache); |
| 2865 vgetcpu_t vgetcpu = (vgetcpu_t)VSYSCALL_ADDR(__NR_vgetcpu); | |
| 2866 retval = vgetcpu(&cpu, NULL, NULL); | |
| 2867 #endif | |
| 2868 | |
| 2869 return (retval == -1) ? retval : cpu; | |
| 2870 } | |
| 2871 | |
| 2191 | 2872 // Something to do with the numa-aware allocator needs these symbols |
| 2873 extern "C" JNIEXPORT void numa_warn(int number, char *where, ...) { } | |
| 2874 extern "C" JNIEXPORT void numa_error(char *where) { } | |
| 2875 extern "C" JNIEXPORT int fork1() { return fork(); } | |
| 141 | 2876 |
|
763
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|
2877 |
|
cf71f149d7ae
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761
diff
changeset
|
2878 // If we are running with libnuma version > 2, then we should |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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761
diff
changeset
|
2879 // be trying to use symbols with versions 1.1 |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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761
diff
changeset
|
2880 // If we are running with earlier version, which did not have symbol versions, |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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761
diff
changeset
|
2881 // we should use the base version. |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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761
diff
changeset
|
2882 void* os::Linux::libnuma_dlsym(void* handle, const char *name) { |
|
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
changeset
|
2883 void *f = dlvsym(handle, name, "libnuma_1.1"); |
|
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
changeset
|
2884 if (f == NULL) { |
|
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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diff
changeset
|
2885 f = dlsym(handle, name); |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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761
diff
changeset
|
2886 } |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
iveresov
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761
diff
changeset
|
2887 return f; |
|
cf71f149d7ae
6840196: NUMA allocator: crash in fastdebug during startup on Linux
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761
diff
changeset
|
2888 } |
|
cf71f149d7ae
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761
diff
changeset
|
2889 |
|
462
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changeset
|
2890 bool os::Linux::libnuma_init() { |
| 141 | 2891 // sched_getcpu() should be in libc. |
| 2892 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, | |
| 2893 dlsym(RTLD_DEFAULT, "sched_getcpu"))); | |
| 2894 | |
| 3826 | 2895 // If it's not, try a direct syscall. |
| 2896 if (sched_getcpu() == -1) | |
| 2897 set_sched_getcpu(CAST_TO_FN_PTR(sched_getcpu_func_t, (void*)&sched_getcpu_syscall)); | |
| 2898 | |
| 141 | 2899 if (sched_getcpu() != -1) { // Does it work? |
|
267
9d6a3a6891f8
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diff
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|
2900 void *handle = dlopen("libnuma.so.1", RTLD_LAZY); |
| 141 | 2901 if (handle != NULL) { |
| 2902 set_numa_node_to_cpus(CAST_TO_FN_PTR(numa_node_to_cpus_func_t, | |
|
763
cf71f149d7ae
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761
diff
changeset
|
2903 libnuma_dlsym(handle, "numa_node_to_cpus"))); |
| 141 | 2904 set_numa_max_node(CAST_TO_FN_PTR(numa_max_node_func_t, |
|
763
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diff
changeset
|
2905 libnuma_dlsym(handle, "numa_max_node"))); |
| 141 | 2906 set_numa_available(CAST_TO_FN_PTR(numa_available_func_t, |
|
763
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diff
changeset
|
2907 libnuma_dlsym(handle, "numa_available"))); |
| 141 | 2908 set_numa_tonode_memory(CAST_TO_FN_PTR(numa_tonode_memory_func_t, |
|
763
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diff
changeset
|
2909 libnuma_dlsym(handle, "numa_tonode_memory"))); |
|
462
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|
2910 set_numa_interleave_memory(CAST_TO_FN_PTR(numa_interleave_memory_func_t, |
|
763
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6840196: NUMA allocator: crash in fastdebug during startup on Linux
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changeset
|
2911 libnuma_dlsym(handle, "numa_interleave_memory"))); |
|
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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|
2912 set_numa_set_bind_policy(CAST_TO_FN_PTR(numa_set_bind_policy_func_t, |
|
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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changeset
|
2913 libnuma_dlsym(handle, "numa_set_bind_policy"))); |
|
462
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|
2914 |
|
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|
2915 |
| 141 | 2916 if (numa_available() != -1) { |
|
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|
2917 set_numa_all_nodes((unsigned long*)libnuma_dlsym(handle, "numa_all_nodes")); |
| 141 | 2918 // Create a cpu -> node mapping |
| 6197 | 2919 _cpu_to_node = new (ResourceObj::C_HEAP, mtInternal) GrowableArray<int>(0, true); |
| 141 | 2920 rebuild_cpu_to_node_map(); |
|
462
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|
2921 return true; |
| 141 | 2922 } |
| 2923 } | |
| 2924 } | |
|
462
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changeset
|
2925 return false; |
| 141 | 2926 } |
| 2927 | |
| 2928 // rebuild_cpu_to_node_map() constructs a table mapping cpud id to node id. | |
| 2929 // The table is later used in get_node_by_cpu(). | |
| 2930 void os::Linux::rebuild_cpu_to_node_map() { | |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2931 const size_t NCPUS = 32768; // Since the buffer size computation is very obscure |
|
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|
2932 // in libnuma (possible values are starting from 16, |
|
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|
2933 // and continuing up with every other power of 2, but less |
|
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2934 // than the maximum number of CPUs supported by kernel), and |
|
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|
2935 // is a subject to change (in libnuma version 2 the requirements |
|
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|
2936 // are more reasonable) we'll just hardcode the number they use |
|
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2937 // in the library. |
|
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2938 const size_t BitsPerCLong = sizeof(long) * CHAR_BIT; |
|
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|
2939 |
|
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|
2940 size_t cpu_num = os::active_processor_count(); |
|
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|
2941 size_t cpu_map_size = NCPUS / BitsPerCLong; |
|
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|
2942 size_t cpu_map_valid_size = |
|
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2943 MIN2((cpu_num + BitsPerCLong - 1) / BitsPerCLong, cpu_map_size); |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2944 |
| 141 | 2945 cpu_to_node()->clear(); |
| 2946 cpu_to_node()->at_grow(cpu_num - 1); | |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2947 size_t node_num = numa_get_groups_num(); |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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|
2948 |
| 6197 | 2949 unsigned long *cpu_map = NEW_C_HEAP_ARRAY(unsigned long, cpu_map_size, mtInternal); |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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changeset
|
2950 for (size_t i = 0; i < node_num; i++) { |
| 141 | 2951 if (numa_node_to_cpus(i, cpu_map, cpu_map_size * sizeof(unsigned long)) != -1) { |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
changeset
|
2952 for (size_t j = 0; j < cpu_map_valid_size; j++) { |
| 141 | 2953 if (cpu_map[j] != 0) { |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
changeset
|
2954 for (size_t k = 0; k < BitsPerCLong; k++) { |
| 141 | 2955 if (cpu_map[j] & (1UL << k)) { |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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changeset
|
2956 cpu_to_node()->at_put(j * BitsPerCLong + k, i); |
| 141 | 2957 } |
| 2958 } | |
| 2959 } | |
| 2960 } | |
| 2961 } | |
| 2962 } | |
| 6197 | 2963 FREE_C_HEAP_ARRAY(unsigned long, cpu_map, mtInternal); |
| 141 | 2964 } |
| 2965 | |
| 2966 int os::Linux::get_node_by_cpu(int cpu_id) { | |
| 2967 if (cpu_to_node() != NULL && cpu_id >= 0 && cpu_id < cpu_to_node()->length()) { | |
| 2968 return cpu_to_node()->at(cpu_id); | |
| 2969 } | |
| 2970 return -1; | |
| 2971 } | |
| 2972 | |
| 2973 GrowableArray<int>* os::Linux::_cpu_to_node; | |
| 2974 os::Linux::sched_getcpu_func_t os::Linux::_sched_getcpu; | |
| 2975 os::Linux::numa_node_to_cpus_func_t os::Linux::_numa_node_to_cpus; | |
| 2976 os::Linux::numa_max_node_func_t os::Linux::_numa_max_node; | |
| 2977 os::Linux::numa_available_func_t os::Linux::_numa_available; | |
| 2978 os::Linux::numa_tonode_memory_func_t os::Linux::_numa_tonode_memory; | |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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changeset
|
2979 os::Linux::numa_interleave_memory_func_t os::Linux::_numa_interleave_memory; |
|
12176
88c255656030
8016155: SIGBUS when running Kitchensink with ParallelScavenge and ParallelOld
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11092
diff
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|
2980 os::Linux::numa_set_bind_policy_func_t os::Linux::_numa_set_bind_policy; |
|
462
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6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
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diff
changeset
|
2981 unsigned long* os::Linux::_numa_all_nodes; |
| 141 | 2982 |
| 6197 | 2983 bool os::pd_uncommit_memory(char* addr, size_t size) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2984 uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2985 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
2986 return res != (uintptr_t) MAP_FAILED; |
| 0 | 2987 } |
| 2988 | |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
2989 static |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
2990 address get_stack_commited_bottom(address bottom, size_t size) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
changeset
|
2991 address nbot = bottom; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
changeset
|
2992 address ntop = bottom + size; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
2993 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
2994 size_t page_sz = os::vm_page_size(); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
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|
2995 unsigned pages = size / page_sz; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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12110
diff
changeset
|
2996 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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12110
diff
changeset
|
2997 unsigned char vec[1]; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
2998 unsigned imin = 1, imax = pages + 1, imid; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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12110
diff
changeset
|
2999 int mincore_return_value; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3000 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3001 while (imin < imax) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3002 imid = (imax + imin) / 2; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3003 nbot = ntop - (imid * page_sz); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
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|
3004 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3005 // Use a trick with mincore to check whether the page is mapped or not. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
changeset
|
3006 // mincore sets vec to 1 if page resides in memory and to 0 if page |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3007 // is swapped output but if page we are asking for is unmapped |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3008 // it returns -1,ENOMEM |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
changeset
|
3009 mincore_return_value = mincore(nbot, page_sz, vec); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
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diff
changeset
|
3010 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3011 if (mincore_return_value == -1) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3012 // Page is not mapped go up |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3013 // to find first mapped page |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
3014 if (errno != EAGAIN) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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12110
diff
changeset
|
3015 assert(errno == ENOMEM, "Unexpected mincore errno"); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
3016 imax = imid; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
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|
3017 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3018 } else { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3019 // Page is mapped go down |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
3020 // to find first not mapped page |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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changeset
|
3021 imin = imid + 1; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
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|
3022 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
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diff
changeset
|
3023 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
3024 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
3025 nbot = nbot + page_sz; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
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|
3026 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
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diff
changeset
|
3027 // Adjust stack bottom one page up if last checked page is not mapped |
|
d8e99408faad
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changeset
|
3028 if (mincore_return_value == -1) { |
|
d8e99408faad
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diff
changeset
|
3029 nbot = nbot + page_sz; |
|
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|
3030 } |
|
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|
3031 |
|
d8e99408faad
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changeset
|
3032 return nbot; |
|
d8e99408faad
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changeset
|
3033 } |
|
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|
3034 |
|
d8e99408faad
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changeset
|
3035 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
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1123
diff
changeset
|
3036 // 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
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1123
diff
changeset
|
3037 // 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
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1123
diff
changeset
|
3038 // stack cannot grow beyond the pages where the stack guard was |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
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1123
diff
changeset
|
3039 // 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
|
3040 // 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
|
3041 // 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
|
3042 // |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
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1123
diff
changeset
|
3043 // 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
|
3044 // 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
|
3045 // 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
|
3046 // 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
|
3047 // 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
|
3048 // create_stack_guard_pages() is called. |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3049 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3050 // 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
|
3051 // 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
|
3052 // 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
|
3053 // 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
|
3054 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3055 // 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
|
3056 // 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
|
3057 // 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
|
3058 // 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
|
3059 // mapping. This only affects the main/initial thread |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3060 |
| 6197 | 3061 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
|
3062 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3063 if (os::Linux::is_initial_thread()) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3064 // 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
|
3065 // 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
|
3066 // we don't need to do anything special. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3067 // Check it first, before calling heavy function. |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3068 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
|
3069 unsigned char vec[1]; |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3070 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3071 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
|
3072 // 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
|
3073 stack_extent = (uintptr_t) get_stack_commited_bottom( |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3074 os::Linux::initial_thread_stack_bottom(), |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3075 (size_t)addr - stack_extent); |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3076 } |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3077 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3078 if (stack_extent < (uintptr_t)addr) { |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3079 ::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
|
3080 } |
|
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 |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3083 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
|
3084 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3085 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3086 // 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
|
3087 // 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
|
3088 // 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
|
3089 // 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
|
3090 // 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
|
3091 |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3092 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
|
3093 uintptr_t stack_extent, stack_base; |
|
12144
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3094 |
|
d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
dsamersoff
parents:
12110
diff
changeset
|
3095 if (os::Linux::is_initial_thread()) { |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3096 return ::munmap(addr, size) == 0; |
|
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 |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3099 return os::uncommit_memory(addr, size); |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3100 } |
|
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1123
diff
changeset
|
3101 |
| 0 | 3102 static address _highest_vm_reserved_address = NULL; |
| 3103 | |
| 3104 // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory | |
| 3105 // at 'requested_addr'. If there are existing memory mappings at the same | |
| 3106 // location, however, they will be overwritten. If 'fixed' is false, | |
| 3107 // 'requested_addr' is only treated as a hint, the return value may or | |
| 3108 // may not start from the requested address. Unlike Linux mmap(), this | |
| 3109 // function returns NULL to indicate failure. | |
| 3110 static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { | |
| 3111 char * addr; | |
| 3112 int flags; | |
| 3113 | |
| 3114 flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; | |
| 3115 if (fixed) { | |
| 3116 assert((uintptr_t)requested_addr % os::Linux::page_size() == 0, "unaligned address"); | |
| 3117 flags |= MAP_FIXED; | |
| 3118 } | |
| 3119 | |
| 10157 | 3120 // Map reserved/uncommitted pages PROT_NONE so we fail early if we |
| 3121 // touch an uncommitted page. Otherwise, the read/write might | |
| 3122 // succeed if we have enough swap space to back the physical page. | |
| 3123 addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, | |
| 0 | 3124 flags, -1, 0); |
| 3125 | |
| 3126 if (addr != MAP_FAILED) { | |
| 3127 // anon_mmap() should only get called during VM initialization, | |
| 3128 // don't need lock (actually we can skip locking even it can be called | |
| 3129 // from multiple threads, because _highest_vm_reserved_address is just a | |
| 3130 // hint about the upper limit of non-stack memory regions.) | |
| 3131 if ((address)addr + bytes > _highest_vm_reserved_address) { | |
| 3132 _highest_vm_reserved_address = (address)addr + bytes; | |
| 3133 } | |
| 3134 } | |
| 3135 | |
| 3136 return addr == MAP_FAILED ? NULL : addr; | |
| 3137 } | |
| 3138 | |
| 3139 // Don't update _highest_vm_reserved_address, because there might be memory | |
| 3140 // regions above addr + size. If so, releasing a memory region only creates | |
| 3141 // a hole in the address space, it doesn't help prevent heap-stack collision. | |
| 3142 // | |
| 3143 static int anon_munmap(char * addr, size_t size) { | |
| 3144 return ::munmap(addr, size) == 0; | |
| 3145 } | |
| 3146 | |
| 6197 | 3147 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
| 0 | 3148 size_t alignment_hint) { |
| 3149 return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); | |
| 3150 } | |
| 3151 | |
| 6197 | 3152 bool os::pd_release_memory(char* addr, size_t size) { |
| 0 | 3153 return anon_munmap(addr, size); |
| 3154 } | |
| 3155 | |
| 3156 static address highest_vm_reserved_address() { | |
| 3157 return _highest_vm_reserved_address; | |
| 3158 } | |
| 3159 | |
| 3160 static bool linux_mprotect(char* addr, size_t size, int prot) { | |
| 3161 // Linux wants the mprotect address argument to be page aligned. | |
| 3162 char* bottom = (char*)align_size_down((intptr_t)addr, os::Linux::page_size()); | |
| 3163 | |
| 3164 // According to SUSv3, mprotect() should only be used with mappings | |
| 3165 // established by mmap(), and mmap() always maps whole pages. Unaligned | |
| 3166 // 'addr' likely indicates problem in the VM (e.g. trying to change | |
| 3167 // protection of malloc'ed or statically allocated memory). Check the | |
| 3168 // caller if you hit this assert. | |
| 3169 assert(addr == bottom, "sanity check"); | |
| 3170 | |
| 3171 size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Linux::page_size()); | |
| 3172 return ::mprotect(bottom, size, prot) == 0; | |
| 3173 } | |
| 3174 | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3175 // Set protections specified |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3176 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
|
3177 bool is_committed) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3178 unsigned int p = 0; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3179 switch (prot) { |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3180 case MEM_PROT_NONE: p = PROT_NONE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3181 case MEM_PROT_READ: p = PROT_READ; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3182 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3183 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
|
3184 default: |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3185 ShouldNotReachHere(); |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3186 } |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3187 // is_committed is unused. |
|
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
3188 return linux_mprotect(addr, bytes, p); |
| 0 | 3189 } |
| 3190 | |
| 3191 bool os::guard_memory(char* addr, size_t size) { | |
| 3192 return linux_mprotect(addr, size, PROT_NONE); | |
| 3193 } | |
| 3194 | |
| 3195 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
|
3196 return linux_mprotect(addr, size, PROT_READ|PROT_WRITE); |
| 0 | 3197 } |
| 3198 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3199 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
|
3200 bool result = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3201 void *p = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3202 MAP_ANONYMOUS|MAP_PRIVATE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3203 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3204 if (p != MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3205 void *aligned_p = align_ptr_up(p, page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3206 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3207 result = madvise(aligned_p, page_size, MADV_HUGEPAGE) == 0; |
|
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 munmap(p, page_size * 2); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3210 } |
|
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 if (warn && !result) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3213 warning("TransparentHugePages is not supported by the operating system."); |
|
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 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3216 return result; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3217 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3218 |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3219 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
|
3220 bool result = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3221 void *p = mmap(NULL, page_size, PROT_READ|PROT_WRITE, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3222 MAP_ANONYMOUS|MAP_PRIVATE|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3223 -1, 0); |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3224 |
|
10969
a837fa3d3f86
8013057: assert(_needs_gc || SafepointSynchronize::is_at_safepoint()) failed: only read at safepoint
dcubed
parents:
10405
diff
changeset
|
3225 if (p != MAP_FAILED) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3226 // 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
|
3227 FILE *fp = fopen("/proc/self/maps", "r"); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3228 if (fp) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3229 while (!feof(fp)) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3230 char chars[257]; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3231 long x = 0; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3232 if (fgets(chars, sizeof(chars), fp)) { |
| 3358 | 3233 if (sscanf(chars, "%lx-%*x", &x) == 1 |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3234 && x == (long)p) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3235 if (strstr (chars, "hugepage")) { |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3236 result = true; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3237 break; |
|
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 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3240 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3241 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3242 fclose(fp); |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3243 } |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3244 munmap(p, page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3245 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3246 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3247 if (warn && !result) { |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3248 warning("HugeTLBFS is not supported by the operating system."); |
|
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 |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3251 return result; |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3252 } |
|
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3253 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3254 /* |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3255 * 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
|
3256 * |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3257 * From the coredump_filter documentation: |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3258 * |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3259 * - (bit 0) anonymous private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3260 * - (bit 1) anonymous shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3261 * - (bit 2) file-backed private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3262 * - (bit 3) file-backed shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3263 * - (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
|
3264 * effective only if the bit 2 is cleared) |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3265 * - (bit 5) hugetlb private memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3266 * - (bit 6) hugetlb shared memory |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3267 */ |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3268 static void set_coredump_filter(void) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3269 FILE *f; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3270 long cdm; |
|
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 if ((f = fopen("/proc/self/coredump_filter", "r+")) == NULL) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3273 return; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3274 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3275 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3276 if (fscanf(f, "%lx", &cdm) != 1) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3277 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3278 return; |
|
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 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3281 rewind(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3282 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3283 if ((cdm & LARGEPAGES_BIT) == 0) { |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3284 cdm |= LARGEPAGES_BIT; |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3285 fprintf(f, "%#lx", cdm); |
|
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 |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3288 fclose(f); |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3289 } |
|
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3290 |
| 0 | 3291 // Large page support |
| 3292 | |
| 3293 static size_t _large_page_size = 0; | |
| 3294 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3295 size_t os::Linux::find_large_page_size() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3296 size_t large_page_size = 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3297 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3298 // 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
|
3299 // 2M or 4M page, depending on whether PAE (Physical Address Extensions) |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3300 // 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
|
3301 // page as large as 256M. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3302 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3303 // 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
|
3304 // for a line with the following format: |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3305 // Hugepagesize: 2048 kB |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3306 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3307 // If 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
|
3308 // 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
|
3309 // the processor. |
| 0 | 3310 |
| 1010 | 3311 #ifndef ZERO |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3312 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
|
3313 ARM_ONLY(2 * M) PPC_ONLY(4 * M); |
| 1010 | 3314 #endif // ZERO |
| 0 | 3315 |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3316 FILE *fp = fopen("/proc/meminfo", "r"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3317 if (fp) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3318 while (!feof(fp)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3319 int x = 0; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3320 char buf[16]; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3321 if (fscanf(fp, "Hugepagesize: %d", &x) == 1) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3322 if (x && fgets(buf, sizeof(buf), fp) && strcmp(buf, " kB\n") == 0) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3323 large_page_size = x * K; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3324 break; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3325 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3326 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3327 // skip to next line |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3328 for (;;) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3329 int ch = fgetc(fp); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3330 if (ch == EOF || ch == (int)'\n') break; |
| 0 | 3331 } |
| 3332 } | |
| 3333 } | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3334 fclose(fp); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3335 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3336 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3337 if (!FLAG_IS_DEFAULT(LargePageSizeInBytes) && LargePageSizeInBytes != large_page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3338 warning("Setting LargePageSizeInBytes has no effect on this OS. Large page size is " |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3339 SIZE_FORMAT "%s.", byte_size_in_proper_unit(large_page_size), |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3340 proper_unit_for_byte_size(large_page_size)); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3341 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3342 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3343 return large_page_size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3344 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3345 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3346 size_t os::Linux::setup_large_page_size() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3347 _large_page_size = Linux::find_large_page_size(); |
| 0 | 3348 const size_t default_page_size = (size_t)Linux::page_size(); |
| 3349 if (_large_page_size > default_page_size) { | |
| 3350 _page_sizes[0] = _large_page_size; | |
| 3351 _page_sizes[1] = default_page_size; | |
| 3352 _page_sizes[2] = 0; | |
| 3353 } | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3354 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3355 return _large_page_size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3356 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3357 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3358 bool os::Linux::setup_large_page_type(size_t page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3359 if (FLAG_IS_DEFAULT(UseHugeTLBFS) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3360 FLAG_IS_DEFAULT(UseSHM) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3361 FLAG_IS_DEFAULT(UseTransparentHugePages)) { |
|
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3362 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3363 // 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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changeset
|
3364 |
|
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8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3365 // Try UseHugeTLBFS and then UseSHM. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3366 UseHugeTLBFS = UseSHM = true; |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3367 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3368 // Don't try UseTransparentHugePages since there are known |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
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diff
changeset
|
3369 // 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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changeset
|
3370 UseTransparentHugePages = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3371 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3372 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3373 if (UseTransparentHugePages) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3374 bool warn_on_failure = !FLAG_IS_DEFAULT(UseTransparentHugePages); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3375 if (transparent_huge_pages_sanity_check(warn_on_failure, page_size)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3376 UseHugeTLBFS = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3377 UseSHM = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3378 return true; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3379 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3380 UseTransparentHugePages = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3381 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3382 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3383 if (UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3384 bool warn_on_failure = !FLAG_IS_DEFAULT(UseHugeTLBFS); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3385 if (hugetlbfs_sanity_check(warn_on_failure, page_size)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3386 UseSHM = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3387 return true; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3388 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3389 UseHugeTLBFS = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3390 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3391 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3392 return UseSHM; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3393 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3394 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3395 void os::large_page_init() { |
|
12832
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3396 if (!UseLargePages && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3397 !UseTransparentHugePages && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3398 !UseHugeTLBFS && |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3399 !UseSHM) { |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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12252
diff
changeset
|
3400 // Not using large pages. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3401 return; |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3402 } |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3403 |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
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diff
changeset
|
3404 if (!FLAG_IS_DEFAULT(UseLargePages) && !UseLargePages) { |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3405 // The user explicitly turned off large pages. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
parents:
12252
diff
changeset
|
3406 // Ignore the rest of the large pages flags. |
|
263f2c796d6c
8024838: Significant slowdown due to transparent huge pages
stefank
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diff
changeset
|
3407 UseTransparentHugePages = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3408 UseHugeTLBFS = false; |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3409 UseSHM = false; |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3410 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3411 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3412 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3413 size_t large_page_size = Linux::setup_large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3414 UseLargePages = Linux::setup_large_page_type(large_page_size); |
|
3286
139667d9836a
7034464: Support transparent large pages on Linux
iveresov
parents:
2302
diff
changeset
|
3415 |
|
2204
63d374c54045
7014918: Improve core/minidump handling in Hotspot
ctornqvi
parents:
2193
diff
changeset
|
3416 set_coredump_filter(); |
| 0 | 3417 } |
| 3418 | |
| 3419 #ifndef SHM_HUGETLB | |
| 3420 #define SHM_HUGETLB 04000 | |
| 3421 #endif | |
| 3422 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3423 char* os::Linux::reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
| 656 | 3424 // "exec" is passed in but not used. Creating the shared image for |
| 3425 // 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
|
3426 assert(UseLargePages && UseSHM, "only for SHM large pages"); |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3427 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
|
3428 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3429 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
|
3430 return NULL; // Fallback to small pages. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3431 } |
| 0 | 3432 |
| 3433 key_t key = IPC_PRIVATE; | |
| 3434 char *addr; | |
| 3435 | |
| 3436 bool warn_on_failure = UseLargePages && | |
| 3437 (!FLAG_IS_DEFAULT(UseLargePages) || | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3438 !FLAG_IS_DEFAULT(UseSHM) || |
| 0 | 3439 !FLAG_IS_DEFAULT(LargePageSizeInBytes) |
| 3440 ); | |
| 3441 char msg[128]; | |
| 3442 | |
| 3443 // Create a large shared memory region to attach to based on size. | |
| 3444 // Currently, size is the total size of the heap | |
| 3445 int shmid = shmget(key, bytes, SHM_HUGETLB|IPC_CREAT|SHM_R|SHM_W); | |
| 3446 if (shmid == -1) { | |
| 3447 // Possible reasons for shmget failure: | |
| 3448 // 1. shmmax is too small for Java heap. | |
| 3449 // > check shmmax value: cat /proc/sys/kernel/shmmax | |
| 3450 // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax | |
| 3451 // 2. not enough large page memory. | |
| 3452 // > check available large pages: cat /proc/meminfo | |
| 3453 // > increase amount of large pages: | |
| 3454 // echo new_value > /proc/sys/vm/nr_hugepages | |
| 3455 // Note 1: different Linux may use different name for this property, | |
| 3456 // e.g. on Redhat AS-3 it is "hugetlb_pool". | |
| 3457 // Note 2: it's possible there's enough physical memory available but | |
| 3458 // they are so fragmented after a long run that they can't | |
| 3459 // coalesce into large pages. Try to reserve large pages when | |
| 3460 // the system is still "fresh". | |
| 3461 if (warn_on_failure) { | |
| 3462 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); | |
| 3463 warning(msg); | |
| 3464 } | |
| 3465 return NULL; | |
| 3466 } | |
| 3467 | |
| 3468 // attach to the region | |
|
1537
79bf863697eb
6951686: Using large pages on Linux prevents zero based compressed oops
kvn
parents:
1500
diff
changeset
|
3469 addr = (char*)shmat(shmid, req_addr, 0); |
| 0 | 3470 int err = errno; |
| 3471 | |
| 3472 // Remove shmid. If shmat() is successful, the actual shared memory segment | |
| 3473 // will be deleted when it's detached by shmdt() or when the process | |
| 3474 // terminates. If shmat() is not successful this will remove the shared | |
| 3475 // segment immediately. | |
| 3476 shmctl(shmid, IPC_RMID, NULL); | |
| 3477 | |
| 3478 if ((intptr_t)addr == -1) { | |
| 3479 if (warn_on_failure) { | |
| 3480 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); | |
| 3481 warning(msg); | |
| 3482 } | |
| 3483 return NULL; | |
| 3484 } | |
| 3485 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3486 return addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3487 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3488 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3489 static void warn_on_large_pages_failure(char* req_addr, size_t bytes, int error) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3490 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
|
3491 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3492 bool warn_on_failure = UseLargePages && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3493 (!FLAG_IS_DEFAULT(UseLargePages) || |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3494 !FLAG_IS_DEFAULT(UseHugeTLBFS) || |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3495 !FLAG_IS_DEFAULT(LargePageSizeInBytes)); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3496 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3497 if (warn_on_failure) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3498 char msg[128]; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3499 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
|
3500 PTR_FORMAT " bytes: " SIZE_FORMAT " (errno = %d).", req_addr, bytes, error); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3501 warning(msg); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3502 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3503 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3504 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3505 char* os::Linux::reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3506 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3507 assert(is_size_aligned(bytes, os::large_page_size()), "Unaligned size"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3508 assert(is_ptr_aligned(req_addr, os::large_page_size()), "Unaligned address"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3509 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3510 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3511 char* addr = (char*)::mmap(req_addr, bytes, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3512 MAP_PRIVATE|MAP_ANONYMOUS|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3513 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3514 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3515 if (addr == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3516 warn_on_large_pages_failure(req_addr, bytes, errno); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3517 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3518 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3519 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3520 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
|
3521 |
| 0 | 3522 return addr; |
| 3523 } | |
| 3524 | |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3525 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
|
3526 size_t large_page_size = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
3527 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3528 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
|
3529 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3530 // Allocate small pages. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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diff
changeset
|
3531 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3532 char* start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3533 if (req_addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3534 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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parents:
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diff
changeset
|
3535 assert(is_size_aligned(bytes, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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11092
diff
changeset
|
3536 start = os::reserve_memory(bytes, req_addr); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3537 assert(start == NULL || start == req_addr, "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3538 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3539 start = os::reserve_memory_aligned(bytes, alignment); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3540 } |
|
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 if (start == NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3543 return NULL; |
|
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 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3546 assert(is_ptr_aligned(start, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3547 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3548 // os::reserve_memory_special will record this memory area. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3549 // Need to release it here to prevent overlapping reservations. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3550 MemTracker::record_virtual_memory_release((address)start, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3551 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3552 char* end = start + bytes; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3553 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3554 // 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
|
3555 char* lp_start = (char*)align_ptr_up(start, large_page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3556 char* lp_end = (char*)align_ptr_down(end, large_page_size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3557 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3558 size_t lp_bytes = lp_end - lp_start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
3559 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3560 assert(is_size_aligned(lp_bytes, large_page_size), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3561 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3562 if (lp_bytes == 0) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3563 // 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
|
3564 // Fall back to allocate a non-special area. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3565 ::munmap(start, end - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3566 return NULL; |
|
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 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
|
3570 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3571 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3572 void* result; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3573 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3574 if (start != lp_start) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3575 result = ::mmap(start, lp_start - start, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3576 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3577 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3578 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3579 ::munmap(lp_start, end - lp_start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3580 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3581 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3582 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3583 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3584 result = ::mmap(lp_start, lp_bytes, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3585 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_HUGETLB, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3586 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3587 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3588 warn_on_large_pages_failure(req_addr, bytes, errno); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3589 // 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
|
3590 // have regions before and after with small pages. Release these regions. |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3591 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3592 // | mapped | unmapped | mapped | |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3593 // ^ ^ ^ ^ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3594 // start lp_start lp_end end |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3595 // |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3596 ::munmap(start, lp_start - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3597 ::munmap(lp_end, end - lp_end); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3598 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3599 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3600 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3601 if (lp_end != end) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3602 result = ::mmap(lp_end, end - lp_end, prot, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3603 MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED, |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3604 -1, 0); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3605 if (result == MAP_FAILED) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3606 ::munmap(start, lp_end - start); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3607 return NULL; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3608 } |
|
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 return start; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3612 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3613 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3614 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
|
3615 assert(UseLargePages && UseHugeTLBFS, "only for Huge TLBFS large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3616 assert(is_ptr_aligned(req_addr, alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3617 assert(is_power_of_2(alignment), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3618 assert(is_power_of_2(os::large_page_size()), "Must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3619 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
|
3620 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3621 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
|
3622 return reserve_memory_special_huge_tlbfs_only(bytes, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3623 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3624 return reserve_memory_special_huge_tlbfs_mixed(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3625 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3626 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3627 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3628 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
|
3629 assert(UseLargePages, "only for large pages"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3630 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3631 char* addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3632 if (UseSHM) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3633 addr = os::Linux::reserve_memory_special_shm(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3634 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3635 assert(UseHugeTLBFS, "must be"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3636 addr = os::Linux::reserve_memory_special_huge_tlbfs(bytes, alignment, req_addr, exec); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3637 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3638 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3639 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3640 if (UseNUMAInterleaving) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3641 numa_make_global(addr, bytes); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3642 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3643 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3644 // The memory is committed |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3645 MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, mtNone, CALLER_PC); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3646 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3647 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3648 return addr; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3649 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
3650 |
|
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|
3651 bool os::Linux::release_memory_special_shm(char* base, size_t bytes) { |
|
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3652 // detaching the SHM segment will also delete it, see reserve_memory_special_shm() |
|
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|
3653 return shmdt(base) == 0; |
|
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|
3654 } |
|
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|
3655 |
|
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|
3656 bool os::Linux::release_memory_special_huge_tlbfs(char* base, size_t bytes) { |
|
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|
3657 return pd_release_memory(base, bytes); |
|
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|
3658 } |
|
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|
3659 |
| 0 | 3660 bool os::release_memory_special(char* base, size_t bytes) { |
|
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|
3661 assert(UseLargePages, "only for large pages"); |
|
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|
3662 |
|
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|
3663 MemTracker::Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); |
|
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|
3664 |
|
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|
3665 bool res; |
|
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|
3666 if (UseSHM) { |
|
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|
3667 res = os::Linux::release_memory_special_shm(base, bytes); |
|
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|
3668 } else { |
|
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|
3669 assert(UseHugeTLBFS, "must be"); |
|
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|
3670 res = os::Linux::release_memory_special_huge_tlbfs(base, bytes); |
|
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|
3671 } |
|
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|
3672 |
|
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|
3673 if (res) { |
|
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|
3674 tkr.record((address)base, bytes); |
|
8711
6b803ba47588
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|
3675 } else { |
|
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|
3676 tkr.discard(); |
|
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|
3677 } |
|
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|
3678 |
|
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|
3679 return res; |
| 0 | 3680 } |
| 3681 | |
| 3682 size_t os::large_page_size() { | |
| 3683 return _large_page_size; | |
| 3684 } | |
| 3685 | |
|
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|
3686 // With SysV SHM the entire memory region must be allocated as shared |
|
3286
139667d9836a
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|
3687 // memory. |
|
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|
3688 // HugeTLBFS allows application to commit large page memory on demand. |
|
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|
3689 // However, when committing memory with HugeTLBFS fails, the region |
|
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|
3690 // that was supposed to be committed will lose the old reservation |
|
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|
3691 // and allow other threads to steal that memory region. Because of this |
|
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|
3692 // behavior we can't commit HugeTLBFS memory. |
| 0 | 3693 bool os::can_commit_large_page_memory() { |
|
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|
3694 return UseTransparentHugePages; |
| 0 | 3695 } |
| 3696 | |
|
79
82db0859acbe
6642862: Code cache allocation fails with large pages after 6588638
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diff
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|
3697 bool os::can_execute_large_page_memory() { |
|
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|
3698 return UseTransparentHugePages || UseHugeTLBFS; |
|
79
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|
3699 } |
|
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|
3700 |
| 0 | 3701 // Reserve memory at an arbitrary address, only if that area is |
| 3702 // available (and not reserved for something else). | |
| 3703 | |
| 6197 | 3704 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
| 0 | 3705 const int max_tries = 10; |
| 3706 char* base[max_tries]; | |
| 3707 size_t size[max_tries]; | |
| 3708 const size_t gap = 0x000000; | |
| 3709 | |
| 3710 // Assert only that the size is a multiple of the page size, since | |
| 3711 // that's all that mmap requires, and since that's all we really know | |
| 3712 // about at this low abstraction level. If we need higher alignment, | |
| 3713 // we can either pass an alignment to this method or verify alignment | |
| 3714 // in one of the methods further up the call chain. See bug 5044738. | |
| 3715 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); | |
| 3716 | |
| 3717 // Repeatedly allocate blocks until the block is allocated at the | |
| 3718 // right spot. Give up after max_tries. Note that reserve_memory() will | |
| 3719 // automatically update _highest_vm_reserved_address if the call is | |
| 3720 // successful. The variable tracks the highest memory address every reserved | |
| 3721 // by JVM. It is used to detect heap-stack collision if running with | |
| 3722 // fixed-stack LinuxThreads. Because here we may attempt to reserve more | |
| 3723 // space than needed, it could confuse the collision detecting code. To | |
| 3724 // solve the problem, save current _highest_vm_reserved_address and | |
| 3725 // calculate the correct value before return. | |
| 3726 address old_highest = _highest_vm_reserved_address; | |
| 3727 | |
| 3728 // Linux mmap allows caller to pass an address as hint; give it a try first, | |
| 3729 // if kernel honors the hint then we can return immediately. | |
| 3730 char * addr = anon_mmap(requested_addr, bytes, false); | |
| 3731 if (addr == requested_addr) { | |
| 3732 return requested_addr; | |
| 3733 } | |
| 3734 | |
| 3735 if (addr != NULL) { | |
| 3736 // mmap() is successful but it fails to reserve at the requested address | |
| 3737 anon_munmap(addr, bytes); | |
| 3738 } | |
| 3739 | |
| 3740 int i; | |
| 3741 for (i = 0; i < max_tries; ++i) { | |
| 3742 base[i] = reserve_memory(bytes); | |
| 3743 | |
| 3744 if (base[i] != NULL) { | |
| 3745 // Is this the block we wanted? | |
| 3746 if (base[i] == requested_addr) { | |
| 3747 size[i] = bytes; | |
| 3748 break; | |
| 3749 } | |
| 3750 | |
| 3751 // Does this overlap the block we wanted? Give back the overlapped | |
| 3752 // parts and try again. | |
| 3753 | |
| 3754 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; | |
| 3755 if (top_overlap >= 0 && top_overlap < bytes) { | |
| 3756 unmap_memory(base[i], top_overlap); | |
| 3757 base[i] += top_overlap; | |
| 3758 size[i] = bytes - top_overlap; | |
| 3759 } else { | |
| 3760 size_t bottom_overlap = base[i] + bytes - requested_addr; | |
| 3761 if (bottom_overlap >= 0 && bottom_overlap < bytes) { | |
| 3762 unmap_memory(requested_addr, bottom_overlap); | |
| 3763 size[i] = bytes - bottom_overlap; | |
| 3764 } else { | |
| 3765 size[i] = bytes; | |
| 3766 } | |
| 3767 } | |
| 3768 } | |
| 3769 } | |
| 3770 | |
| 3771 // Give back the unused reserved pieces. | |
| 3772 | |
| 3773 for (int j = 0; j < i; ++j) { | |
| 3774 if (base[j] != NULL) { | |
| 3775 unmap_memory(base[j], size[j]); | |
| 3776 } | |
| 3777 } | |
| 3778 | |
| 3779 if (i < max_tries) { | |
| 3780 _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); | |
| 3781 return requested_addr; | |
| 3782 } else { | |
| 3783 _highest_vm_reserved_address = old_highest; | |
| 3784 return NULL; | |
| 3785 } | |
| 3786 } | |
| 3787 | |
| 3788 size_t os::read(int fd, void *buf, unsigned int nBytes) { | |
| 3789 return ::read(fd, buf, nBytes); | |
| 3790 } | |
| 3791 | |
| 3792 // TODO-FIXME: reconcile Solaris' os::sleep with the linux variation. | |
| 3793 // Solaris uses poll(), linux uses park(). | |
| 3794 // Poll() is likely a better choice, assuming that Thread.interrupt() | |
| 3795 // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with | |
| 3796 // SIGSEGV, see 4355769. | |
| 3797 | |
| 3798 int os::sleep(Thread* thread, jlong millis, bool interruptible) { | |
| 3799 assert(thread == Thread::current(), "thread consistency check"); | |
| 3800 | |
| 3801 ParkEvent * const slp = thread->_SleepEvent ; | |
| 3802 slp->reset() ; | |
| 3803 OrderAccess::fence() ; | |
| 3804 | |
| 3805 if (interruptible) { | |
| 3806 jlong prevtime = javaTimeNanos(); | |
| 3807 | |
| 3808 for (;;) { | |
| 3809 if (os::is_interrupted(thread, true)) { | |
| 3810 return OS_INTRPT; | |
| 3811 } | |
| 3812 | |
| 3813 jlong newtime = javaTimeNanos(); | |
| 3814 | |
| 3815 if (newtime - prevtime < 0) { | |
| 3816 // time moving backwards, should only happen if no monotonic clock | |
| 3817 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3818 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3819 } else { | |
|
4712
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7117303: VM uses non-monotonic time source and complains that it is non-monotonic
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4082
diff
changeset
|
3820 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3821 } |
| 3822 | |
| 3823 if(millis <= 0) { | |
| 3824 return OS_OK; | |
| 3825 } | |
| 3826 | |
| 3827 prevtime = newtime; | |
| 3828 | |
| 3829 { | |
| 3830 assert(thread->is_Java_thread(), "sanity check"); | |
| 3831 JavaThread *jt = (JavaThread *) thread; | |
| 3832 ThreadBlockInVM tbivm(jt); | |
| 3833 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); | |
| 3834 | |
| 3835 jt->set_suspend_equivalent(); | |
| 3836 // cleared by handle_special_suspend_equivalent_condition() or | |
| 3837 // java_suspend_self() via check_and_wait_while_suspended() | |
| 3838 | |
| 3839 slp->park(millis); | |
| 3840 | |
| 3841 // were we externally suspended while we were waiting? | |
| 3842 jt->check_and_wait_while_suspended(); | |
| 3843 } | |
| 3844 } | |
| 3845 } else { | |
| 3846 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 3847 jlong prevtime = javaTimeNanos(); | |
| 3848 | |
| 3849 for (;;) { | |
| 3850 // It'd be nice to avoid the back-to-back javaTimeNanos() calls on | |
| 3851 // the 1st iteration ... | |
| 3852 jlong newtime = javaTimeNanos(); | |
| 3853 | |
| 3854 if (newtime - prevtime < 0) { | |
| 3855 // time moving backwards, should only happen if no monotonic clock | |
| 3856 // not a guarantee() because JVM should not abort on kernel/glibc bugs | |
| 3857 assert(!Linux::supports_monotonic_clock(), "time moving backwards"); | |
| 3858 } else { | |
|
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4082
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|
3859 millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
| 0 | 3860 } |
| 3861 | |
| 3862 if(millis <= 0) break ; | |
| 3863 | |
| 3864 prevtime = newtime; | |
| 3865 slp->park(millis); | |
| 3866 } | |
| 3867 return OS_OK ; | |
| 3868 } | |
| 3869 } | |
| 3870 | |
| 3871 int os::naked_sleep() { | |
| 3872 // %% make the sleep time an integer flag. for now use 1 millisec. | |
| 3873 return os::sleep(Thread::current(), 1, false); | |
| 3874 } | |
| 3875 | |
| 3876 // Sleep forever; naked call to OS-specific sleep; use with CAUTION | |
| 3877 void os::infinite_sleep() { | |
| 3878 while (true) { // sleep forever ... | |
| 3879 ::sleep(100); // ... 100 seconds at a time | |
| 3880 } | |
| 3881 } | |
| 3882 | |
| 3883 // Used to convert frequent JVM_Yield() to nops | |
| 3884 bool os::dont_yield() { | |
| 3885 return DontYieldALot; | |
| 3886 } | |
| 3887 | |
| 3888 void os::yield() { | |
| 3889 sched_yield(); | |
| 3890 } | |
| 3891 | |
| 3892 os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} | |
| 3893 | |
| 3894 void os::yield_all(int attempts) { | |
| 3895 // Yields to all threads, including threads with lower priorities | |
| 3896 // Threads on Linux are all with same priority. The Solaris style | |
| 3897 // os::yield_all() with nanosleep(1ms) is not necessary. | |
| 3898 sched_yield(); | |
| 3899 } | |
| 3900 | |
| 3901 // Called from the tight loops to possibly influence time-sharing heuristics | |
| 3902 void os::loop_breaker(int attempts) { | |
| 3903 os::yield_all(attempts); | |
| 3904 } | |
| 3905 | |
| 3906 //////////////////////////////////////////////////////////////////////////////// | |
| 3907 // thread priority support | |
| 3908 | |
| 3909 // Note: Normal Linux applications are run with SCHED_OTHER policy. SCHED_OTHER | |
| 3910 // only supports dynamic priority, static priority must be zero. For real-time | |
| 3911 // applications, Linux supports SCHED_RR which allows static priority (1-99). | |
| 3912 // However, for large multi-threaded applications, SCHED_RR is not only slower | |
| 3913 // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out | |
| 3914 // of 5 runs - Sep 2005). | |
| 3915 // | |
| 3916 // The following code actually changes the niceness of kernel-thread/LWP. It | |
| 3917 // has an assumption that setpriority() only modifies one kernel-thread/LWP, | |
| 3918 // not the entire user process, and user level threads are 1:1 mapped to kernel | |
| 3919 // threads. It has always been the case, but could change in the future. For | |
| 3920 // this reason, the code should not be used as default (ThreadPriorityPolicy=0). | |
| 3921 // It is only used when ThreadPriorityPolicy=1 and requires root privilege. | |
| 3922 | |
|
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4803
diff
changeset
|
3923 int os::java_to_os_priority[CriticalPriority + 1] = { |
| 0 | 3924 19, // 0 Entry should never be used |
| 3925 | |
| 3926 4, // 1 MinPriority | |
| 3927 3, // 2 | |
| 3928 2, // 3 | |
| 3929 | |
| 3930 1, // 4 | |
| 3931 0, // 5 NormPriority | |
| 3932 -1, // 6 | |
| 3933 | |
| 3934 -2, // 7 | |
| 3935 -3, // 8 | |
| 3936 -4, // 9 NearMaxPriority | |
| 3937 | |
|
4854
de268c8a8075
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4803
diff
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|
3938 -5, // 10 MaxPriority |
|
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
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|
3939 |
|
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4803
diff
changeset
|
3940 -5 // 11 CriticalPriority |
| 0 | 3941 }; |
| 3942 | |
| 3943 static int prio_init() { | |
| 3944 if (ThreadPriorityPolicy == 1) { | |
| 3945 // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 | |
| 3946 // if effective uid is not root. Perhaps, a more elegant way of doing | |
| 3947 // this is to test CAP_SYS_NICE capability, but that will require libcap.so | |
| 3948 if (geteuid() != 0) { | |
| 3949 if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { | |
| 3950 warning("-XX:ThreadPriorityPolicy requires root privilege on Linux"); | |
| 3951 } | |
| 3952 ThreadPriorityPolicy = 0; | |
| 3953 } | |
| 3954 } | |
|
4854
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4803
diff
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|
3955 if (UseCriticalJavaThreadPriority) { |
|
de268c8a8075
7082553: Interpret Thread.setPriority(Thread.MAX_PRIORITY) to mean FX60 on Solaris 10 and 11
phh
parents:
4803
diff
changeset
|
3956 os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
|
de268c8a8075
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4803
diff
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|
3957 } |
| 0 | 3958 return 0; |
| 3959 } | |
| 3960 | |
| 3961 OSReturn os::set_native_priority(Thread* thread, int newpri) { | |
| 3962 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; | |
| 3963 | |
| 3964 int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); | |
| 3965 return (ret == 0) ? OS_OK : OS_ERR; | |
| 3966 } | |
| 3967 | |
| 3968 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { | |
| 3969 if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { | |
| 3970 *priority_ptr = java_to_os_priority[NormPriority]; | |
| 3971 return OS_OK; | |
| 3972 } | |
| 3973 | |
| 3974 errno = 0; | |
| 3975 *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); | |
| 3976 return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); | |
| 3977 } | |
| 3978 | |
| 3979 // Hint to the underlying OS that a task switch would not be good. | |
| 3980 // Void return because it's a hint and can fail. | |
| 3981 void os::hint_no_preempt() {} | |
| 3982 | |
| 3983 //////////////////////////////////////////////////////////////////////////////// | |
| 3984 // suspend/resume support | |
| 3985 | |
| 3986 // the low-level signal-based suspend/resume support is a remnant from the | |
| 3987 // old VM-suspension that used to be for java-suspension, safepoints etc, | |
| 3988 // within hotspot. Now there is a single use-case for this: | |
| 3989 // - calling get_thread_pc() on the VMThread by the flat-profiler task | |
| 3990 // that runs in the watcher thread. | |
| 3991 // The remaining code is greatly simplified from the more general suspension | |
| 3992 // code that used to be used. | |
| 3993 // | |
| 3994 // The protocol is quite simple: | |
| 3995 // - suspend: | |
| 3996 // - sends a signal to the target thread | |
| 3997 // - polls the suspend state of the osthread using a yield loop | |
| 3998 // - target thread signal handler (SR_handler) sets suspend state | |
| 3999 // and blocks in sigsuspend until continued | |
| 4000 // - resume: | |
| 4001 // - sets target osthread state to continue | |
| 4002 // - sends signal to end the sigsuspend loop in the SR_handler | |
| 4003 // | |
| 4004 // Note that the SR_lock plays no role in this suspend/resume protocol. | |
| 4005 // | |
| 4006 | |
| 4007 static void resume_clear_context(OSThread *osthread) { | |
| 4008 osthread->set_ucontext(NULL); | |
| 4009 osthread->set_siginfo(NULL); | |
| 4010 } | |
| 4011 | |
| 4012 static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { | |
| 4013 osthread->set_ucontext(context); | |
| 4014 osthread->set_siginfo(siginfo); | |
| 4015 } | |
| 4016 | |
| 4017 // | |
| 4018 // Handler function invoked when a thread's execution is suspended or | |
| 4019 // resumed. We have to be careful that only async-safe functions are | |
| 4020 // called here (Note: most pthread functions are not async safe and | |
| 4021 // should be avoided.) | |
| 4022 // | |
| 4023 // Note: sigwait() is a more natural fit than sigsuspend() from an | |
| 4024 // interface point of view, but sigwait() prevents the signal hander | |
| 4025 // from being run. libpthread would get very confused by not having | |
| 4026 // its signal handlers run and prevents sigwait()'s use with the | |
| 4027 // mutex granting granting signal. | |
| 4028 // | |
| 10405 | 4029 // Currently only ever called on the VMThread and JavaThreads (PC sampling) |
| 0 | 4030 // |
| 4031 static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { | |
| 4032 // Save and restore errno to avoid confusing native code with EINTR | |
| 4033 // after sigsuspend. | |
| 4034 int old_errno = errno; | |
| 4035 | |
| 4036 Thread* thread = Thread::current(); | |
| 4037 OSThread* osthread = thread->osthread(); | |
| 10405 | 4038 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
| 4039 | |
| 4040 os::SuspendResume::State current = osthread->sr.state(); | |
| 4041 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { | |
| 0 | 4042 suspend_save_context(osthread, siginfo, context); |
| 4043 | |
| 10405 | 4044 // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
| 4045 os::SuspendResume::State state = osthread->sr.suspended(); | |
| 4046 if (state == os::SuspendResume::SR_SUSPENDED) { | |
| 4047 sigset_t suspend_set; // signals for sigsuspend() | |
| 4048 | |
| 4049 // get current set of blocked signals and unblock resume signal | |
| 4050 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); | |
| 4051 sigdelset(&suspend_set, SR_signum); | |
| 4052 | |
| 4053 sr_semaphore.signal(); | |
| 4054 // wait here until we are resumed | |
| 4055 while (1) { | |
| 4056 sigsuspend(&suspend_set); | |
| 4057 | |
| 4058 os::SuspendResume::State result = osthread->sr.running(); | |
| 4059 if (result == os::SuspendResume::SR_RUNNING) { | |
| 4060 sr_semaphore.signal(); | |
| 4061 break; | |
| 4062 } | |
| 4063 } | |
| 4064 | |
| 4065 } else if (state == os::SuspendResume::SR_RUNNING) { | |
| 4066 // request was cancelled, continue | |
| 4067 } else { | |
| 4068 ShouldNotReachHere(); | |
| 4069 } | |
| 0 | 4070 |
| 4071 resume_clear_context(osthread); | |
| 10405 | 4072 } else if (current == os::SuspendResume::SR_RUNNING) { |
| 4073 // request was cancelled, continue | |
| 4074 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { | |
| 4075 // ignore | |
| 0 | 4076 } else { |
| 10405 | 4077 // ignore |
| 0 | 4078 } |
| 4079 | |
| 4080 errno = old_errno; | |
| 4081 } | |
| 4082 | |
| 4083 | |
| 4084 static int SR_initialize() { | |
| 4085 struct sigaction act; | |
| 4086 char *s; | |
| 4087 /* Get signal number to use for suspend/resume */ | |
| 4088 if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { | |
| 4089 int sig = ::strtol(s, 0, 10); | |
| 4090 if (sig > 0 || sig < _NSIG) { | |
| 4091 SR_signum = sig; | |
| 4092 } | |
| 4093 } | |
| 4094 | |
| 4095 assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, | |
| 4096 "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); | |
| 4097 | |
| 4098 sigemptyset(&SR_sigset); | |
| 4099 sigaddset(&SR_sigset, SR_signum); | |
| 4100 | |
| 4101 /* Set up signal handler for suspend/resume */ | |
| 4102 act.sa_flags = SA_RESTART|SA_SIGINFO; | |
| 4103 act.sa_handler = (void (*)(int)) SR_handler; | |
| 4104 | |
| 4105 // SR_signum is blocked by default. | |
| 4106 // 4528190 - We also need to block pthread restart signal (32 on all | |
| 4107 // supported Linux platforms). Note that LinuxThreads need to block | |
| 4108 // this signal for all threads to work properly. So we don't have | |
| 4109 // to use hard-coded signal number when setting up the mask. | |
| 4110 pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); | |
| 4111 | |
| 4112 if (sigaction(SR_signum, &act, 0) == -1) { | |
| 4113 return -1; | |
| 4114 } | |
| 4115 | |
| 4116 // Save signal flag | |
| 4117 os::Linux::set_our_sigflags(SR_signum, act.sa_flags); | |
| 4118 return 0; | |
| 4119 } | |
| 4120 | |
| 10405 | 4121 static int sr_notify(OSThread* osthread) { |
| 4122 int status = pthread_kill(osthread->pthread_id(), SR_signum); | |
| 4123 assert_status(status == 0, status, "pthread_kill"); | |
| 4124 return status; | |
| 4125 } | |
| 4126 | |
| 4127 // "Randomly" selected value for how long we want to spin | |
| 4128 // before bailing out on suspending a thread, also how often | |
| 4129 // we send a signal to a thread we want to resume | |
| 4130 static const int RANDOMLY_LARGE_INTEGER = 1000000; | |
| 4131 static const int RANDOMLY_LARGE_INTEGER2 = 100; | |
| 0 | 4132 |
| 4133 // returns true on success and false on error - really an error is fatal | |
| 4134 // but this seems the normal response to library errors | |
| 4135 static bool do_suspend(OSThread* osthread) { | |
| 10405 | 4136 assert(osthread->sr.is_running(), "thread should be running"); |
| 4137 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); | |
| 4138 | |
| 0 | 4139 // mark as suspended and send signal |
| 10405 | 4140 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
| 4141 // failed to switch, state wasn't running? | |
| 4142 ShouldNotReachHere(); | |
| 4143 return false; | |
| 4144 } | |
| 4145 | |
| 4146 if (sr_notify(osthread) != 0) { | |
| 4147 ShouldNotReachHere(); | |
| 4148 } | |
| 4149 | |
| 4150 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED | |
| 4151 while (true) { | |
| 4152 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
| 4153 break; | |
| 4154 } else { | |
| 4155 // timeout | |
| 4156 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); | |
| 4157 if (cancelled == os::SuspendResume::SR_RUNNING) { | |
| 4158 return false; | |
| 4159 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { | |
| 4160 // make sure that we consume the signal on the semaphore as well | |
| 4161 sr_semaphore.wait(); | |
| 4162 break; | |
| 4163 } else { | |
| 4164 ShouldNotReachHere(); | |
| 4165 return false; | |
| 4166 } | |
| 0 | 4167 } |
| 10405 | 4168 } |
| 4169 | |
| 4170 guarantee(osthread->sr.is_suspended(), "Must be suspended"); | |
| 4171 return true; | |
| 0 | 4172 } |
| 4173 | |
| 4174 static void do_resume(OSThread* osthread) { | |
| 4175 assert(osthread->sr.is_suspended(), "thread should be suspended"); | |
| 10405 | 4176 assert(!sr_semaphore.trywait(), "invalid semaphore state"); |
| 4177 | |
| 4178 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { | |
| 4179 // failed to switch to WAKEUP_REQUEST | |
| 4180 ShouldNotReachHere(); | |
| 4181 return; | |
| 4182 } | |
| 4183 | |
| 4184 while (true) { | |
| 4185 if (sr_notify(osthread) == 0) { | |
| 4186 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { | |
| 4187 if (osthread->sr.is_running()) { | |
| 4188 return; | |
| 4189 } | |
| 4190 } | |
| 4191 } else { | |
| 4192 ShouldNotReachHere(); | |
| 0 | 4193 } |
| 4194 } | |
| 10405 | 4195 |
| 4196 guarantee(osthread->sr.is_running(), "Must be running!"); | |
| 0 | 4197 } |
| 4198 | |
| 4199 //////////////////////////////////////////////////////////////////////////////// | |
| 4200 // interrupt support | |
| 4201 | |
| 4202 void os::interrupt(Thread* thread) { | |
| 4203 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 4204 "possibility of dangling Thread pointer"); | |
| 4205 | |
| 4206 OSThread* osthread = thread->osthread(); | |
| 4207 | |
| 4208 if (!osthread->interrupted()) { | |
| 4209 osthread->set_interrupted(true); | |
| 4210 // More than one thread can get here with the same value of osthread, | |
| 4211 // resulting in multiple notifications. We do, however, want the store | |
| 4212 // to interrupted() to be visible to other threads before we execute unpark(). | |
| 4213 OrderAccess::fence(); | |
| 4214 ParkEvent * const slp = thread->_SleepEvent ; | |
| 4215 if (slp != NULL) slp->unpark() ; | |
| 4216 } | |
| 4217 | |
| 4218 // For JSR166. Unpark even if interrupt status already was set | |
| 4219 if (thread->is_Java_thread()) | |
| 4220 ((JavaThread*)thread)->parker()->unpark(); | |
| 4221 | |
| 4222 ParkEvent * ev = thread->_ParkEvent ; | |
| 4223 if (ev != NULL) ev->unpark() ; | |
| 4224 | |
| 4225 } | |
| 4226 | |
| 4227 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 4228 assert(Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 4229 "possibility of dangling Thread pointer"); | |
| 4230 | |
| 4231 OSThread* osthread = thread->osthread(); | |
| 4232 | |
| 4233 bool interrupted = osthread->interrupted(); | |
| 4234 | |
| 4235 if (interrupted && clear_interrupted) { | |
| 4236 osthread->set_interrupted(false); | |
| 4237 // consider thread->_SleepEvent->reset() ... optional optimization | |
| 4238 } | |
| 4239 | |
| 4240 return interrupted; | |
| 4241 } | |
| 4242 | |
| 4243 /////////////////////////////////////////////////////////////////////////////////// | |
| 4244 // signal handling (except suspend/resume) | |
| 4245 | |
| 4246 // This routine may be used by user applications as a "hook" to catch signals. | |
| 4247 // The user-defined signal handler must pass unrecognized signals to this | |
| 4248 // routine, and if it returns true (non-zero), then the signal handler must | |
| 4249 // return immediately. If the flag "abort_if_unrecognized" is true, then this | |
| 4250 // routine will never retun false (zero), but instead will execute a VM panic | |
| 4251 // routine kill the process. | |
| 4252 // | |
| 4253 // If this routine returns false, it is OK to call it again. This allows | |
| 4254 // the user-defined signal handler to perform checks either before or after | |
| 4255 // the VM performs its own checks. Naturally, the user code would be making | |
| 4256 // a serious error if it tried to handle an exception (such as a null check | |
| 4257 // or breakpoint) that the VM was generating for its own correct operation. | |
| 4258 // | |
| 4259 // This routine may recognize any of the following kinds of signals: | |
| 4260 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. | |
| 4261 // It should be consulted by handlers for any of those signals. | |
| 4262 // | |
| 4263 // The caller of this routine must pass in the three arguments supplied | |
| 4264 // to the function referred to in the "sa_sigaction" (not the "sa_handler") | |
| 4265 // field of the structure passed to sigaction(). This routine assumes that | |
| 4266 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. | |
| 4267 // | |
| 4268 // Note that the VM will print warnings if it detects conflicting signal | |
| 4269 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". | |
| 4270 // | |
| 2191 | 4271 extern "C" JNIEXPORT int |
| 0 | 4272 JVM_handle_linux_signal(int signo, siginfo_t* siginfo, |
| 4273 void* ucontext, int abort_if_unrecognized); | |
| 4274 | |
| 4275 void signalHandler(int sig, siginfo_t* info, void* uc) { | |
| 4276 assert(info != NULL && uc != NULL, "it must be old kernel"); | |
| 8067 | 4277 int orig_errno = errno; // Preserve errno value over signal handler. |
| 0 | 4278 JVM_handle_linux_signal(sig, info, uc, true); |
| 8067 | 4279 errno = orig_errno; |
| 0 | 4280 } |
| 4281 | |
| 4282 | |
| 4283 // This boolean allows users to forward their own non-matching signals | |
| 4284 // to JVM_handle_linux_signal, harmlessly. | |
| 4285 bool os::Linux::signal_handlers_are_installed = false; | |
| 4286 | |
| 4287 // For signal-chaining | |
| 4288 struct sigaction os::Linux::sigact[MAXSIGNUM]; | |
| 4289 unsigned int os::Linux::sigs = 0; | |
| 4290 bool os::Linux::libjsig_is_loaded = false; | |
| 4291 typedef struct sigaction *(*get_signal_t)(int); | |
| 4292 get_signal_t os::Linux::get_signal_action = NULL; | |
| 4293 | |
| 4294 struct sigaction* os::Linux::get_chained_signal_action(int sig) { | |
| 4295 struct sigaction *actp = NULL; | |
| 4296 | |
| 4297 if (libjsig_is_loaded) { | |
| 4298 // Retrieve the old signal handler from libjsig | |
| 4299 actp = (*get_signal_action)(sig); | |
| 4300 } | |
| 4301 if (actp == NULL) { | |
| 4302 // Retrieve the preinstalled signal handler from jvm | |
| 4303 actp = get_preinstalled_handler(sig); | |
| 4304 } | |
| 4305 | |
| 4306 return actp; | |
| 4307 } | |
| 4308 | |
| 4309 static bool call_chained_handler(struct sigaction *actp, int sig, | |
| 4310 siginfo_t *siginfo, void *context) { | |
| 4311 // Call the old signal handler | |
| 4312 if (actp->sa_handler == SIG_DFL) { | |
| 4313 // It's more reasonable to let jvm treat it as an unexpected exception | |
| 4314 // instead of taking the default action. | |
| 4315 return false; | |
| 4316 } else if (actp->sa_handler != SIG_IGN) { | |
| 4317 if ((actp->sa_flags & SA_NODEFER) == 0) { | |
| 4318 // automaticlly block the signal | |
| 4319 sigaddset(&(actp->sa_mask), sig); | |
| 4320 } | |
| 4321 | |
| 4322 sa_handler_t hand; | |
| 4323 sa_sigaction_t sa; | |
| 4324 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; | |
| 4325 // retrieve the chained handler | |
| 4326 if (siginfo_flag_set) { | |
| 4327 sa = actp->sa_sigaction; | |
| 4328 } else { | |
| 4329 hand = actp->sa_handler; | |
| 4330 } | |
| 4331 | |
| 4332 if ((actp->sa_flags & SA_RESETHAND) != 0) { | |
| 4333 actp->sa_handler = SIG_DFL; | |
| 4334 } | |
| 4335 | |
| 4336 // try to honor the signal mask | |
| 4337 sigset_t oset; | |
| 4338 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); | |
| 4339 | |
| 4340 // call into the chained handler | |
| 4341 if (siginfo_flag_set) { | |
| 4342 (*sa)(sig, siginfo, context); | |
| 4343 } else { | |
| 4344 (*hand)(sig); | |
| 4345 } | |
| 4346 | |
| 4347 // restore the signal mask | |
| 4348 pthread_sigmask(SIG_SETMASK, &oset, 0); | |
| 4349 } | |
| 4350 // Tell jvm's signal handler the signal is taken care of. | |
| 4351 return true; | |
| 4352 } | |
| 4353 | |
| 4354 bool os::Linux::chained_handler(int sig, siginfo_t* siginfo, void* context) { | |
| 4355 bool chained = false; | |
| 4356 // signal-chaining | |
| 4357 if (UseSignalChaining) { | |
| 4358 struct sigaction *actp = get_chained_signal_action(sig); | |
| 4359 if (actp != NULL) { | |
| 4360 chained = call_chained_handler(actp, sig, siginfo, context); | |
| 4361 } | |
| 4362 } | |
| 4363 return chained; | |
| 4364 } | |
| 4365 | |
| 4366 struct sigaction* os::Linux::get_preinstalled_handler(int sig) { | |
| 4367 if ((( (unsigned int)1 << sig ) & sigs) != 0) { | |
| 4368 return &sigact[sig]; | |
| 4369 } | |
| 4370 return NULL; | |
| 4371 } | |
| 4372 | |
| 4373 void os::Linux::save_preinstalled_handler(int sig, struct sigaction& oldAct) { | |
| 4374 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4375 sigact[sig] = oldAct; | |
| 4376 sigs |= (unsigned int)1 << sig; | |
| 4377 } | |
| 4378 | |
| 4379 // for diagnostic | |
| 4380 int os::Linux::sigflags[MAXSIGNUM]; | |
| 4381 | |
| 4382 int os::Linux::get_our_sigflags(int sig) { | |
| 4383 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4384 return sigflags[sig]; | |
| 4385 } | |
| 4386 | |
| 4387 void os::Linux::set_our_sigflags(int sig, int flags) { | |
| 4388 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4389 sigflags[sig] = flags; | |
| 4390 } | |
| 4391 | |
| 4392 void os::Linux::set_signal_handler(int sig, bool set_installed) { | |
| 4393 // Check for overwrite. | |
| 4394 struct sigaction oldAct; | |
| 4395 sigaction(sig, (struct sigaction*)NULL, &oldAct); | |
| 4396 | |
| 4397 void* oldhand = oldAct.sa_sigaction | |
| 4398 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4399 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4400 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && | |
| 4401 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && | |
| 4402 oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { | |
| 4403 if (AllowUserSignalHandlers || !set_installed) { | |
| 4404 // Do not overwrite; user takes responsibility to forward to us. | |
| 4405 return; | |
| 4406 } else if (UseSignalChaining) { | |
| 4407 // save the old handler in jvm | |
| 4408 save_preinstalled_handler(sig, oldAct); | |
| 4409 // libjsig also interposes the sigaction() call below and saves the | |
| 4410 // old sigaction on it own. | |
| 4411 } else { | |
|
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diff
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|
4412 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
|
f03d0a26bf83
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1353
diff
changeset
|
4413 "%#lx for signal %d.", (long)oldhand, sig)); |
| 0 | 4414 } |
| 4415 } | |
| 4416 | |
| 4417 struct sigaction sigAct; | |
| 4418 sigfillset(&(sigAct.sa_mask)); | |
| 4419 sigAct.sa_handler = SIG_DFL; | |
| 4420 if (!set_installed) { | |
| 4421 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 4422 } else { | |
| 4423 sigAct.sa_sigaction = signalHandler; | |
| 4424 sigAct.sa_flags = SA_SIGINFO|SA_RESTART; | |
| 4425 } | |
| 4426 // Save flags, which are set by ours | |
| 4427 assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); | |
| 4428 sigflags[sig] = sigAct.sa_flags; | |
| 4429 | |
| 4430 int ret = sigaction(sig, &sigAct, &oldAct); | |
| 4431 assert(ret == 0, "check"); | |
| 4432 | |
| 4433 void* oldhand2 = oldAct.sa_sigaction | |
| 4434 ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) | |
| 4435 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); | |
| 4436 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); | |
| 4437 } | |
| 4438 | |
| 4439 // install signal handlers for signals that HotSpot needs to | |
| 4440 // handle in order to support Java-level exception handling. | |
| 4441 | |
| 4442 void os::Linux::install_signal_handlers() { | |
| 4443 if (!signal_handlers_are_installed) { | |
| 4444 signal_handlers_are_installed = true; | |
| 4445 | |
| 4446 // signal-chaining | |
| 4447 typedef void (*signal_setting_t)(); | |
| 4448 signal_setting_t begin_signal_setting = NULL; | |
| 4449 signal_setting_t end_signal_setting = NULL; | |
| 4450 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4451 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); | |
| 4452 if (begin_signal_setting != NULL) { | |
| 4453 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, | |
| 4454 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); | |
| 4455 get_signal_action = CAST_TO_FN_PTR(get_signal_t, | |
| 4456 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); | |
| 4457 libjsig_is_loaded = true; | |
| 4458 assert(UseSignalChaining, "should enable signal-chaining"); | |
| 4459 } | |
| 4460 if (libjsig_is_loaded) { | |
| 4461 // Tell libjsig jvm is setting signal handlers | |
| 4462 (*begin_signal_setting)(); | |
| 4463 } | |
| 4464 | |
| 4465 set_signal_handler(SIGSEGV, true); | |
| 4466 set_signal_handler(SIGPIPE, true); | |
| 4467 set_signal_handler(SIGBUS, true); | |
| 4468 set_signal_handler(SIGILL, true); | |
| 4469 set_signal_handler(SIGFPE, true); | |
| 4470 set_signal_handler(SIGXFSZ, true); | |
| 4471 | |
| 4472 if (libjsig_is_loaded) { | |
| 4473 // Tell libjsig jvm finishes setting signal handlers | |
| 4474 (*end_signal_setting)(); | |
| 4475 } | |
| 4476 | |
| 4477 // We don't activate signal checker if libjsig is in place, we trust ourselves | |
|
3956
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diff
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|
4478 // and if UserSignalHandler is installed all bets are off. |
|
3607aac85aa9
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3913
diff
changeset
|
4479 // Log that signal checking is off only if -verbose:jni is specified. |
| 0 | 4480 if (CheckJNICalls) { |
| 4481 if (libjsig_is_loaded) { | |
|
3956
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diff
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|
4482 if (PrintJNIResolving) { |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4483 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4484 } |
| 0 | 4485 check_signals = false; |
| 4486 } | |
| 4487 if (AllowUserSignalHandlers) { | |
|
3956
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4488 if (PrintJNIResolving) { |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4489 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
|
3607aac85aa9
7051189: Need to suppress info message if -xcheck:jni used with libjsig.so
kevinw
parents:
3913
diff
changeset
|
4490 } |
| 0 | 4491 check_signals = false; |
| 4492 } | |
| 4493 } | |
| 4494 } | |
| 4495 } | |
| 4496 | |
| 4497 // This is the fastest way to get thread cpu time on Linux. | |
| 4498 // Returns cpu time (user+sys) for any thread, not only for current. | |
| 4499 // POSIX compliant clocks are implemented in the kernels 2.6.16+. | |
| 4500 // It might work on 2.6.10+ with a special kernel/glibc patch. | |
| 4501 // For reference, please, see IEEE Std 1003.1-2004: | |
| 4502 // http://www.unix.org/single_unix_specification | |
| 4503 | |
| 4504 jlong os::Linux::fast_thread_cpu_time(clockid_t clockid) { | |
| 4505 struct timespec tp; | |
| 4506 int rc = os::Linux::clock_gettime(clockid, &tp); | |
| 4507 assert(rc == 0, "clock_gettime is expected to return 0 code"); | |
| 4508 | |
|
4712
e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
johnc
parents:
4082
diff
changeset
|
4509 return (tp.tv_sec * NANOSECS_PER_SEC) + tp.tv_nsec; |
| 0 | 4510 } |
| 4511 | |
| 4512 ///// | |
| 4513 // glibc on Linux platform uses non-documented flag | |
| 4514 // to indicate, that some special sort of signal | |
| 4515 // trampoline is used. | |
| 4516 // We will never set this flag, and we should | |
| 4517 // ignore this flag in our diagnostic | |
| 4518 #ifdef SIGNIFICANT_SIGNAL_MASK | |
| 4519 #undef SIGNIFICANT_SIGNAL_MASK | |
| 4520 #endif | |
| 4521 #define SIGNIFICANT_SIGNAL_MASK (~0x04000000) | |
| 4522 | |
| 4523 static const char* get_signal_handler_name(address handler, | |
| 4524 char* buf, int buflen) { | |
| 4525 int offset; | |
| 4526 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); | |
| 4527 if (found) { | |
| 4528 // skip directory names | |
| 4529 const char *p1, *p2; | |
| 4530 p1 = buf; | |
| 4531 size_t len = strlen(os::file_separator()); | |
| 4532 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; | |
| 4533 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); | |
| 4534 } else { | |
| 4535 jio_snprintf(buf, buflen, PTR_FORMAT, handler); | |
| 4536 } | |
| 4537 return buf; | |
| 4538 } | |
| 4539 | |
| 4540 static void print_signal_handler(outputStream* st, int sig, | |
| 4541 char* buf, size_t buflen) { | |
| 4542 struct sigaction sa; | |
| 4543 | |
| 4544 sigaction(sig, NULL, &sa); | |
| 4545 | |
| 4546 // See comment for SIGNIFICANT_SIGNAL_MASK define | |
| 4547 sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4548 | |
| 4549 st->print("%s: ", os::exception_name(sig, buf, buflen)); | |
| 4550 | |
| 4551 address handler = (sa.sa_flags & SA_SIGINFO) | |
| 4552 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) | |
| 4553 : CAST_FROM_FN_PTR(address, sa.sa_handler); | |
| 4554 | |
| 4555 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { | |
| 4556 st->print("SIG_DFL"); | |
| 4557 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { | |
| 4558 st->print("SIG_IGN"); | |
| 4559 } else { | |
| 4560 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); | |
| 4561 } | |
| 4562 | |
| 4563 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); | |
| 4564 | |
| 4565 address rh = VMError::get_resetted_sighandler(sig); | |
| 4566 // May be, handler was resetted by VMError? | |
| 4567 if(rh != NULL) { | |
| 4568 handler = rh; | |
| 4569 sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; | |
| 4570 } | |
| 4571 | |
| 4572 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); | |
| 4573 | |
| 4574 // Check: is it our handler? | |
| 4575 if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || | |
| 4576 handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { | |
| 4577 // It is our signal handler | |
| 4578 // check for flags, reset system-used one! | |
| 4579 if((int)sa.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
| 4580 st->print( | |
| 4581 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", | |
| 4582 os::Linux::get_our_sigflags(sig)); | |
| 4583 } | |
| 4584 } | |
| 4585 st->cr(); | |
| 4586 } | |
| 4587 | |
| 4588 | |
| 4589 #define DO_SIGNAL_CHECK(sig) \ | |
| 4590 if (!sigismember(&check_signal_done, sig)) \ | |
| 4591 os::Linux::check_signal_handler(sig) | |
| 4592 | |
| 4593 // This method is a periodic task to check for misbehaving JNI applications | |
| 4594 // under CheckJNI, we can add any periodic checks here | |
| 4595 | |
| 4596 void os::run_periodic_checks() { | |
| 4597 | |
| 4598 if (check_signals == false) return; | |
| 4599 | |
| 4600 // SEGV and BUS if overridden could potentially prevent | |
| 4601 // generation of hs*.log in the event of a crash, debugging | |
| 4602 // such a case can be very challenging, so we absolutely | |
| 4603 // check the following for a good measure: | |
| 4604 DO_SIGNAL_CHECK(SIGSEGV); | |
| 4605 DO_SIGNAL_CHECK(SIGILL); | |
| 4606 DO_SIGNAL_CHECK(SIGFPE); | |
| 4607 DO_SIGNAL_CHECK(SIGBUS); | |
| 4608 DO_SIGNAL_CHECK(SIGPIPE); | |
| 4609 DO_SIGNAL_CHECK(SIGXFSZ); | |
| 4610 | |
| 4611 | |
| 4612 // ReduceSignalUsage allows the user to override these handlers | |
| 4613 // see comments at the very top and jvm_solaris.h | |
| 4614 if (!ReduceSignalUsage) { | |
| 4615 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); | |
| 4616 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); | |
| 4617 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); | |
| 4618 DO_SIGNAL_CHECK(BREAK_SIGNAL); | |
| 4619 } | |
| 4620 | |
| 4621 DO_SIGNAL_CHECK(SR_signum); | |
| 4622 DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); | |
| 4623 } | |
| 4624 | |
| 4625 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); | |
| 4626 | |
| 4627 static os_sigaction_t os_sigaction = NULL; | |
| 4628 | |
| 4629 void os::Linux::check_signal_handler(int sig) { | |
| 4630 char buf[O_BUFLEN]; | |
| 4631 address jvmHandler = NULL; | |
| 4632 | |
| 4633 | |
| 4634 struct sigaction act; | |
| 4635 if (os_sigaction == NULL) { | |
| 4636 // only trust the default sigaction, in case it has been interposed | |
| 4637 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); | |
| 4638 if (os_sigaction == NULL) return; | |
| 4639 } | |
| 4640 | |
| 4641 os_sigaction(sig, (struct sigaction*)NULL, &act); | |
| 4642 | |
| 4643 | |
| 4644 act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; | |
| 4645 | |
| 4646 address thisHandler = (act.sa_flags & SA_SIGINFO) | |
| 4647 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) | |
| 4648 : CAST_FROM_FN_PTR(address, act.sa_handler) ; | |
| 4649 | |
| 4650 | |
| 4651 switch(sig) { | |
| 4652 case SIGSEGV: | |
| 4653 case SIGBUS: | |
| 4654 case SIGFPE: | |
| 4655 case SIGPIPE: | |
| 4656 case SIGILL: | |
| 4657 case SIGXFSZ: | |
| 4658 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); | |
| 4659 break; | |
| 4660 | |
| 4661 case SHUTDOWN1_SIGNAL: | |
| 4662 case SHUTDOWN2_SIGNAL: | |
| 4663 case SHUTDOWN3_SIGNAL: | |
| 4664 case BREAK_SIGNAL: | |
| 4665 jvmHandler = (address)user_handler(); | |
| 4666 break; | |
| 4667 | |
| 4668 case INTERRUPT_SIGNAL: | |
| 4669 jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); | |
| 4670 break; | |
| 4671 | |
| 4672 default: | |
| 4673 if (sig == SR_signum) { | |
| 4674 jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); | |
| 4675 } else { | |
| 4676 return; | |
| 4677 } | |
| 4678 break; | |
| 4679 } | |
| 4680 | |
| 4681 if (thisHandler != jvmHandler) { | |
| 4682 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); | |
| 4683 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); | |
| 4684 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); | |
| 4685 // No need to check this sig any longer | |
| 4686 sigaddset(&check_signal_done, sig); | |
| 4687 } else if(os::Linux::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Linux::get_our_sigflags(sig)) { | |
| 4688 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); | |
| 4689 tty->print("expected:" PTR32_FORMAT, os::Linux::get_our_sigflags(sig)); | |
| 4690 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); | |
| 4691 // No need to check this sig any longer | |
| 4692 sigaddset(&check_signal_done, sig); | |
| 4693 } | |
| 4694 | |
| 4695 // Dump all the signal | |
| 4696 if (sigismember(&check_signal_done, sig)) { | |
| 4697 print_signal_handlers(tty, buf, O_BUFLEN); | |
| 4698 } | |
| 4699 } | |
| 4700 | |
| 4701 extern void report_error(char* file_name, int line_no, char* title, char* format, ...); | |
| 4702 | |
| 4703 extern bool signal_name(int signo, char* buf, size_t len); | |
| 4704 | |
| 4705 const char* os::exception_name(int exception_code, char* buf, size_t size) { | |
| 4706 if (0 < exception_code && exception_code <= SIGRTMAX) { | |
| 4707 // signal | |
| 4708 if (!signal_name(exception_code, buf, size)) { | |
| 4709 jio_snprintf(buf, size, "SIG%d", exception_code); | |
| 4710 } | |
| 4711 return buf; | |
| 4712 } else { | |
| 4713 return NULL; | |
| 4714 } | |
| 4715 } | |
| 4716 | |
| 4717 // this is called _before_ the most of global arguments have been parsed | |
| 4718 void os::init(void) { | |
| 4719 char dummy; /* used to get a guess on initial stack address */ | |
| 4720 // first_hrtime = gethrtime(); | |
| 4721 | |
| 4722 // With LinuxThreads the JavaMain thread pid (primordial thread) | |
| 4723 // is different than the pid of the java launcher thread. | |
| 4724 // So, on Linux, the launcher thread pid is passed to the VM | |
| 4725 // via the sun.java.launcher.pid property. | |
| 4726 // Use this property instead of getpid() if it was correctly passed. | |
| 4727 // See bug 6351349. | |
| 4728 pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); | |
| 4729 | |
| 4730 _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); | |
| 4731 | |
| 4732 clock_tics_per_sec = sysconf(_SC_CLK_TCK); | |
| 4733 | |
| 4734 init_random(1234567); | |
| 4735 | |
| 4736 ThreadCritical::initialize(); | |
| 4737 | |
| 4738 Linux::set_page_size(sysconf(_SC_PAGESIZE)); | |
| 4739 if (Linux::page_size() == -1) { | |
|
1490
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4740 fatal(err_msg("os_linux.cpp: os::init: sysconf failed (%s)", |
|
f03d0a26bf83
6888954: argument formatting for assert() and friends
jcoomes
parents:
1353
diff
changeset
|
4741 strerror(errno))); |
| 0 | 4742 } |
| 4743 init_page_sizes((size_t) Linux::page_size()); | |
| 4744 | |
| 4745 Linux::initialize_system_info(); | |
| 4746 | |
| 4747 // main_thread points to the aboriginal thread | |
| 4748 Linux::_main_thread = pthread_self(); | |
| 4749 | |
| 4750 Linux::clock_init(); | |
|
12997
e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
jbachorik
parents:
12840
diff
changeset
|
4751 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
|
4752 |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4753 // 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
|
4754 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
|
4755 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
|
4756 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
|
4757 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
|
4758 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4759 // 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
|
4760 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
|
4761 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
|
4762 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
|
4763 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
|
4764 " - 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
|
4765 } 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
|
4766 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
|
4767 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4768 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4769 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
4770 // 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
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12182
diff
changeset
|
4771 |
| 242 | 4772 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
|
4773 |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4774 // 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
|
4775 // 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
|
4776 // 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
|
4777 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
|
4778 StackYellowPages = 1; |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4779 StackRedPages = 1; |
|
b4081e9714ec
8013398: Adjust number of stack guard pages on systems with large memory page size
vladidan
parents:
10157
diff
changeset
|
4780 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
|
4781 } |
| 0 | 4782 } |
| 4783 | |
| 4784 // To install functions for atexit system call | |
| 4785 extern "C" { | |
| 4786 static void perfMemory_exit_helper() { | |
| 4787 perfMemory_exit(); | |
| 4788 } | |
| 4789 } | |
| 4790 | |
| 4791 // this is called _after_ the global arguments have been parsed | |
| 4792 jint os::init_2(void) | |
| 4793 { | |
| 4794 Linux::fast_thread_clock_init(); | |
| 4795 | |
| 4796 // Allocate a single page and mark it as readable for safepoint polling | |
| 4797 address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); | |
| 4798 guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); | |
| 4799 | |
| 4800 os::set_polling_page( polling_page ); | |
| 4801 | |
| 4802 #ifndef PRODUCT | |
| 4803 if(Verbose && PrintMiscellaneous) | |
| 4804 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); | |
| 4805 #endif | |
| 4806 | |
| 4807 if (!UseMembar) { | |
| 4808 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
|
4809 guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); |
| 0 | 4810 os::set_memory_serialize_page( mem_serialize_page ); |
| 4811 | |
| 4812 #ifndef PRODUCT | |
| 4813 if(Verbose && PrintMiscellaneous) | |
| 4814 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); | |
| 4815 #endif | |
| 4816 } | |
| 4817 | |
| 4818 // initialize suspend/resume support - must do this before signal_sets_init() | |
| 4819 if (SR_initialize() != 0) { | |
| 4820 perror("SR_initialize failed"); | |
| 4821 return JNI_ERR; | |
| 4822 } | |
| 4823 | |
| 4824 Linux::signal_sets_init(); | |
| 4825 Linux::install_signal_handlers(); | |
| 4826 | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4827 // 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
|
4828 // the java system classes, including StackOverflowError - depends on page |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4829 // 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
|
4830 // 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
|
4831 // class initialization depending on 32 or 64 bit VM. |
|
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4832 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
|
4833 (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
|
4834 (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
|
4835 |
| 0 | 4836 size_t threadStackSizeInBytes = ThreadStackSize * K; |
| 4837 if (threadStackSizeInBytes != 0 && | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4838 threadStackSizeInBytes < os::Linux::min_stack_allowed) { |
| 0 | 4839 tty->print_cr("\nThe stack size specified is too small, " |
| 4840 "Specify at least %dk", | |
|
1867
b6aedd1acdc0
6983240: guarantee((Solaris::min_stack_allowed >= (StackYellowPages+StackRedPages...) wrong
coleenp
parents:
1865
diff
changeset
|
4841 os::Linux::min_stack_allowed/ K); |
| 0 | 4842 return JNI_ERR; |
| 4843 } | |
| 4844 | |
| 4845 // Make the stack size a multiple of the page size so that | |
| 4846 // the yellow/red zones can be guarded. | |
| 4847 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, | |
| 4848 vm_page_size())); | |
| 4849 | |
| 4850 Linux::capture_initial_stack(JavaThread::stack_size_at_create()); | |
| 4851 | |
|
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
|
4852 #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
|
4853 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
|
4854 #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
|
4855 |
| 0 | 4856 Linux::libpthread_init(); |
| 4857 if (PrintMiscellaneous && (Verbose || WizardMode)) { | |
| 4858 tty->print_cr("[HotSpot is running with %s, %s(%s)]\n", | |
| 4859 Linux::glibc_version(), Linux::libpthread_version(), | |
| 4860 Linux::is_floating_stack() ? "floating stack" : "fixed stack"); | |
| 4861 } | |
| 4862 | |
| 141 | 4863 if (UseNUMA) { |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4864 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
|
4865 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4866 } else { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4867 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
|
4868 // 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
|
4869 UseNUMA = false; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4870 } |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4871 } |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4872 // 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
|
4873 // 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
|
4874 // 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
|
4875 // disable adaptive resizing. |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4876 if (UseNUMA && UseLargePages && !can_commit_large_page_memory()) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4877 if (FLAG_IS_DEFAULT(UseNUMA)) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4878 UseNUMA = false; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4879 } else { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4880 if (FLAG_IS_DEFAULT(UseLargePages) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4881 FLAG_IS_DEFAULT(UseSHM) && |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4882 FLAG_IS_DEFAULT(UseHugeTLBFS)) { |
|
3292
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4883 UseLargePages = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4884 } else { |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
4885 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
|
4886 UseAdaptiveSizePolicy = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4887 UseAdaptiveNUMAChunkSizing = false; |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4888 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4889 } |
|
c303b3532d4a
7037939: NUMA: Disable adaptive resizing if SHM large pages are used
iveresov
parents:
3290
diff
changeset
|
4890 } |
|
462
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4891 if (!UseNUMA && ForceNUMA) { |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4892 UseNUMA = true; |
|
85f1b9537f70
6779436: NUMA allocator: libnuma expects certain size of the buffer in numa_node_to_cpus()
iveresov
parents:
356
diff
changeset
|
4893 } |
| 141 | 4894 } |
| 4895 | |
| 0 | 4896 if (MaxFDLimit) { |
| 4897 // set the number of file descriptors to max. print out error | |
| 4898 // if getrlimit/setrlimit fails but continue regardless. | |
| 4899 struct rlimit nbr_files; | |
| 4900 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4901 if (status != 0) { | |
| 4902 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4903 perror("os::init_2 getrlimit failed"); | |
| 4904 } else { | |
| 4905 nbr_files.rlim_cur = nbr_files.rlim_max; | |
| 4906 status = setrlimit(RLIMIT_NOFILE, &nbr_files); | |
| 4907 if (status != 0) { | |
| 4908 if (PrintMiscellaneous && (Verbose || WizardMode)) | |
| 4909 perror("os::init_2 setrlimit failed"); | |
| 4910 } | |
| 4911 } | |
| 4912 } | |
| 4913 | |
| 4914 // Initialize lock used to serialize thread creation (see os::create_thread) | |
| 4915 Linux::set_createThread_lock(new Mutex(Mutex::leaf, "createThread_lock", false)); | |
| 4916 | |
| 4917 // at-exit methods are called in the reverse order of their registration. | |
| 4918 // atexit functions are called on return from main or as a result of a | |
| 4919 // call to exit(3C). There can be only 32 of these functions registered | |
| 4920 // and atexit() does not set errno. | |
| 4921 | |
| 4922 if (PerfAllowAtExitRegistration) { | |
| 4923 // only register atexit functions if PerfAllowAtExitRegistration is set. | |
| 4924 // atexit functions can be delayed until process exit time, which | |
| 4925 // can be problematic for embedded VM situations. Embedded VMs should | |
| 4926 // call DestroyJavaVM() to assure that VM resources are released. | |
| 4927 | |
| 4928 // note: perfMemory_exit_helper atexit function may be removed in | |
| 4929 // the future if the appropriate cleanup code can be added to the | |
| 4930 // VM_Exit VMOperation's doit method. | |
| 4931 if (atexit(perfMemory_exit_helper) != 0) { | |
| 4932 warning("os::init2 atexit(perfMemory_exit_helper) failed"); | |
| 4933 } | |
| 4934 } | |
| 4935 | |
| 4936 // initialize thread priority policy | |
| 4937 prio_init(); | |
| 4938 | |
| 4939 return JNI_OK; | |
| 4940 } | |
| 4941 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4942 // this is called at the end of vm_initialization |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4943 void os::init_3(void) |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4944 { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4945 #ifdef JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4946 // Start the MemNotifyThread |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4947 if (LowMemoryProtection) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4948 MemNotifyThread::start(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4949 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4950 return; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4951 #endif |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
4952 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
4953 |
| 0 | 4954 // Mark the polling page as unreadable |
| 4955 void os::make_polling_page_unreadable(void) { | |
| 4956 if( !guard_memory((char*)_polling_page, Linux::page_size()) ) | |
| 4957 fatal("Could not disable polling page"); | |
| 4958 }; | |
| 4959 | |
| 4960 // Mark the polling page as readable | |
| 4961 void os::make_polling_page_readable(void) { | |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
4962 if( !linux_mprotect((char *)_polling_page, Linux::page_size(), PROT_READ)) { |
| 0 | 4963 fatal("Could not enable polling page"); |
|
237
1fdb98a17101
6716785: implicit null checks not triggering with CompressedOops
coleenp
parents:
235
diff
changeset
|
4964 } |
| 0 | 4965 }; |
| 4966 | |
| 4967 int os::active_processor_count() { | |
| 4968 // Linux doesn't yet have a (official) notion of processor sets, | |
| 4969 // so just return the number of online processors. | |
| 4970 int online_cpus = ::sysconf(_SC_NPROCESSORS_ONLN); | |
| 4971 assert(online_cpus > 0 && online_cpus <= processor_count(), "sanity check"); | |
| 4972 return online_cpus; | |
| 4973 } | |
| 4974 | |
| 4006 | 4975 void os::set_native_thread_name(const char *name) { |
| 4976 // Not yet implemented. | |
| 4977 return; | |
| 4978 } | |
| 4979 | |
| 0 | 4980 bool os::distribute_processes(uint length, uint* distribution) { |
| 4981 // Not yet implemented. | |
| 4982 return false; | |
| 4983 } | |
| 4984 | |
| 4985 bool os::bind_to_processor(uint processor_id) { | |
| 4986 // Not yet implemented. | |
| 4987 return false; | |
| 4988 } | |
| 4989 | |
| 4990 /// | |
| 4991 | |
| 10405 | 4992 void os::SuspendedThreadTask::internal_do_task() { |
| 4993 if (do_suspend(_thread->osthread())) { | |
| 4994 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); | |
| 4995 do_task(context); | |
| 4996 do_resume(_thread->osthread()); | |
| 4997 } | |
| 4998 } | |
| 4999 | |
| 5000 class PcFetcher : public os::SuspendedThreadTask { | |
| 5001 public: | |
| 5002 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} | |
| 5003 ExtendedPC result(); | |
| 5004 protected: | |
| 5005 void do_task(const os::SuspendedThreadTaskContext& context); | |
| 5006 private: | |
| 5007 ExtendedPC _epc; | |
| 5008 }; | |
| 5009 | |
| 5010 ExtendedPC PcFetcher::result() { | |
| 5011 guarantee(is_done(), "task is not done yet."); | |
| 5012 return _epc; | |
| 5013 } | |
| 5014 | |
| 5015 void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { | |
| 5016 Thread* thread = context.thread(); | |
| 5017 OSThread* osthread = thread->osthread(); | |
| 5018 if (osthread->ucontext() != NULL) { | |
| 5019 _epc = os::Linux::ucontext_get_pc((ucontext_t *) context.ucontext()); | |
| 5020 } else { | |
| 5021 // NULL context is unexpected, double-check this is the VMThread | |
| 5022 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); | |
| 5023 } | |
| 5024 } | |
| 5025 | |
| 0 | 5026 // Suspends the target using the signal mechanism and then grabs the PC before |
| 5027 // resuming the target. Used by the flat-profiler only | |
| 5028 ExtendedPC os::get_thread_pc(Thread* thread) { | |
| 5029 // Make sure that it is called by the watcher for the VMThread | |
| 5030 assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); | |
| 5031 assert(thread->is_VM_thread(), "Can only be called for VMThread"); | |
| 5032 | |
| 10405 | 5033 PcFetcher fetcher(thread); |
| 5034 fetcher.run(); | |
| 5035 return fetcher.result(); | |
| 0 | 5036 } |
| 5037 | |
| 5038 int os::Linux::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) | |
| 5039 { | |
| 5040 if (is_NPTL()) { | |
| 5041 return pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 5042 } else { | |
| 5043 // 6292965: LinuxThreads pthread_cond_timedwait() resets FPU control | |
| 5044 // word back to default 64bit precision if condvar is signaled. Java | |
| 5045 // wants 53bit precision. Save and restore current value. | |
| 5046 int fpu = get_fpu_control_word(); | |
| 5047 int status = pthread_cond_timedwait(_cond, _mutex, _abstime); | |
| 5048 set_fpu_control_word(fpu); | |
| 5049 return status; | |
| 5050 } | |
| 5051 } | |
| 5052 | |
| 5053 //////////////////////////////////////////////////////////////////////////////// | |
| 5054 // debug support | |
| 5055 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5056 bool os::find(address addr, outputStream* st) { |
| 0 | 5057 Dl_info dlinfo; |
| 5058 memset(&dlinfo, 0, sizeof(dlinfo)); | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5059 if (dladdr(addr, &dlinfo) != 0) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5060 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
|
5061 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5062 st->print("%s+%#x", dlinfo.dli_sname, |
| 0 | 5063 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
|
5064 } else if (dlinfo.dli_fbase != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5065 st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
| 0 | 5066 } else { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5067 st->print("<absolute address>"); |
| 0 | 5068 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5069 if (dlinfo.dli_fname != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5070 st->print(" in %s", dlinfo.dli_fname); |
| 0 | 5071 } |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5072 if (dlinfo.dli_fbase != NULL) { |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5073 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
| 0 | 5074 } |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5075 st->cr(); |
| 0 | 5076 |
| 5077 if (Verbose) { | |
| 5078 // decode some bytes around the PC | |
|
9060
cc32ccaaf47f
8003310: Enable -Wunused-function when compiling with gcc
mikael
parents:
9059
diff
changeset
|
5079 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
|
5080 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
| 0 | 5081 address lowest = (address) dlinfo.dli_sname; |
| 5082 if (!lowest) lowest = (address) dlinfo.dli_fbase; | |
| 5083 if (begin < lowest) begin = lowest; | |
| 5084 Dl_info dlinfo2; | |
|
11092
59b052799158
8015884: runThese crashed with SIGSEGV, hs_err has an error instead of stacktrace
dcubed
parents:
10986
diff
changeset
|
5085 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
| 0 | 5086 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) |
| 5087 end = (address) dlinfo2.dli_saddr; | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5088 Disassembler::decode(begin, end, st); |
| 0 | 5089 } |
| 5090 return true; | |
| 5091 } | |
| 5092 return false; | |
| 5093 } | |
| 5094 | |
| 5095 //////////////////////////////////////////////////////////////////////////////// | |
| 5096 // misc | |
| 5097 | |
| 5098 // This does not do anything on Linux. This is basically a hook for being | |
| 5099 // able to use structured exception handling (thread-local exception filters) | |
| 5100 // on, e.g., Win32. | |
| 5101 void | |
| 5102 os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, | |
| 5103 JavaCallArguments* args, Thread* thread) { | |
| 5104 f(value, method, args, thread); | |
| 5105 } | |
| 5106 | |
| 5107 void os::print_statistics() { | |
| 5108 } | |
| 5109 | |
| 5110 int os::message_box(const char* title, const char* message) { | |
| 5111 int i; | |
| 5112 fdStream err(defaultStream::error_fd()); | |
| 5113 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 5114 err.cr(); | |
| 5115 err.print_raw_cr(title); | |
| 5116 for (i = 0; i < 78; i++) err.print_raw("-"); | |
| 5117 err.cr(); | |
| 5118 err.print_raw_cr(message); | |
| 5119 for (i = 0; i < 78; i++) err.print_raw("="); | |
| 5120 err.cr(); | |
| 5121 | |
| 5122 char buf[16]; | |
| 5123 // Prevent process from exiting upon "read error" without consuming all CPU | |
| 5124 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } | |
| 5125 | |
| 5126 return buf[0] == 'y' || buf[0] == 'Y'; | |
| 5127 } | |
| 5128 | |
| 5129 int os::stat(const char *path, struct stat *sbuf) { | |
| 5130 char pathbuf[MAX_PATH]; | |
| 5131 if (strlen(path) > MAX_PATH - 1) { | |
| 5132 errno = ENAMETOOLONG; | |
| 5133 return -1; | |
| 5134 } | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5135 os::native_path(strcpy(pathbuf, path)); |
| 0 | 5136 return ::stat(pathbuf, sbuf); |
| 5137 } | |
| 5138 | |
| 5139 bool os::check_heap(bool force) { | |
| 5140 return true; | |
| 5141 } | |
| 5142 | |
| 5143 int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { | |
| 5144 return ::vsnprintf(buf, count, format, args); | |
| 5145 } | |
| 5146 | |
| 5147 // Is a (classpath) directory empty? | |
| 5148 bool os::dir_is_empty(const char* path) { | |
| 5149 DIR *dir = NULL; | |
| 5150 struct dirent *ptr; | |
| 5151 | |
| 5152 dir = opendir(path); | |
| 5153 if (dir == NULL) return true; | |
| 5154 | |
| 5155 /* Scan the directory */ | |
| 5156 bool result = true; | |
| 5157 char buf[sizeof(struct dirent) + MAX_PATH]; | |
| 5158 while (result && (ptr = ::readdir(dir)) != NULL) { | |
| 5159 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { | |
| 5160 result = false; | |
| 5161 } | |
| 5162 } | |
| 5163 closedir(dir); | |
| 5164 return result; | |
| 5165 } | |
| 5166 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5167 // 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
|
5168 // from src/solaris/hpi/src/system_md.c |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5169 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5170 #ifndef O_DELETE |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5171 #define O_DELETE 0x10000 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5172 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5173 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5174 // 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
|
5175 // 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
|
5176 // 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
|
5177 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5178 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
|
5179 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5180 if (strlen(path) > MAX_PATH - 1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5181 errno = ENAMETOOLONG; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5182 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5183 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5184 int fd; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5185 int o_delete = (oflag & O_DELETE); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5186 oflag = oflag & ~O_DELETE; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5187 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5188 fd = ::open64(path, oflag, mode); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5189 if (fd == -1) return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5190 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5191 //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
|
5192 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5193 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5194 int ret = ::fstat64(fd, &buf64); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5195 int st_mode = buf64.st_mode; |
|
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 if (ret != -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5198 if ((st_mode & S_IFMT) == S_IFDIR) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5199 errno = EISDIR; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5200 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5201 return -1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5202 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5203 } else { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5204 ::close(fd); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5205 return -1; |
|
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 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5208 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5209 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5210 * 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
|
5211 * specifically destined for a subprocess should have the |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5212 * 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
|
5213 * 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
|
5214 * 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
|
5215 * UNIXProcess.c), and this in turn might: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5216 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5217 * - 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
|
5218 * descriptors, resulting in mysterious hangs, or |
|
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 * - 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
|
5221 * suffering from bug 1085341. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5222 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5223 * (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
|
5224 * design flaw) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5225 * |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5226 * See: |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5227 * 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
|
5228 * 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
|
5229 * 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
|
5230 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5231 #ifdef FD_CLOEXEC |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5232 { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5233 int flags = ::fcntl(fd, F_GETFD); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5234 if (flags != -1) |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5235 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
|
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 #endif |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5238 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5239 if (o_delete != 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5240 ::unlink(path); |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5241 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5242 return fd; |
|
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 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5245 |
| 0 | 5246 // create binary file, rewriting existing file if required |
| 5247 int os::create_binary_file(const char* path, bool rewrite_existing) { | |
| 5248 int oflags = O_WRONLY | O_CREAT; | |
| 5249 if (!rewrite_existing) { | |
| 5250 oflags |= O_EXCL; | |
| 5251 } | |
| 5252 return ::open64(path, oflags, S_IREAD | S_IWRITE); | |
| 5253 } | |
| 5254 | |
| 5255 // return current position of file pointer | |
| 5256 jlong os::current_file_offset(int fd) { | |
| 5257 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); | |
| 5258 } | |
| 5259 | |
| 5260 // move file pointer to the specified offset | |
| 5261 jlong os::seek_to_file_offset(int fd, jlong offset) { | |
| 5262 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); | |
| 5263 } | |
| 5264 | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5265 // This code originates from JDK's sysAvailable |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5266 // 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
|
5267 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5268 int os::available(int fd, jlong *bytes) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5269 jlong cur, end; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5270 int mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5271 struct stat64 buf64; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5272 |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5273 if (::fstat64(fd, &buf64) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5274 mode = buf64.st_mode; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5275 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
|
5276 /* |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5277 * 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
|
5278 * 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
|
5279 * blocking, interruptible calls in this file. |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5280 */ |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5281 int n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5282 if (::ioctl(fd, FIONREAD, &n) >= 0) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5283 *bytes = n; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5284 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5285 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5286 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5287 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5288 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5289 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5290 } 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
|
5291 return 0; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5292 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5293 return 0; |
|
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 *bytes = end - cur; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5296 return 1; |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5297 } |
|
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5298 |
|
2033
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5299 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
|
5300 // 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
|
5301 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
|
5302 |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5303 //%% 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
|
5304 // 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
|
5305 return (ret < 0) ? 0 : 1; |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5306 } |
|
03e1b9fce89d
7003707: need to remove (some) system include files from the HotSpot header files
dholmes
parents:
2023
diff
changeset
|
5307 |
| 0 | 5308 // Map a block of memory. |
| 6197 | 5309 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 5310 char *addr, size_t bytes, bool read_only, |
| 5311 bool allow_exec) { | |
| 5312 int prot; | |
| 5909 | 5313 int flags = MAP_PRIVATE; |
| 0 | 5314 |
| 5315 if (read_only) { | |
| 5316 prot = PROT_READ; | |
| 5317 } else { | |
| 5318 prot = PROT_READ | PROT_WRITE; | |
| 5319 } | |
| 5320 | |
| 5321 if (allow_exec) { | |
| 5322 prot |= PROT_EXEC; | |
| 5323 } | |
| 5324 | |
| 5325 if (addr != NULL) { | |
| 5326 flags |= MAP_FIXED; | |
| 5327 } | |
| 5328 | |
| 5329 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, | |
| 5330 fd, file_offset); | |
| 5331 if (mapped_address == MAP_FAILED) { | |
| 5332 return NULL; | |
| 5333 } | |
| 5334 return mapped_address; | |
| 5335 } | |
| 5336 | |
| 5337 | |
| 5338 // Remap a block of memory. | |
| 6197 | 5339 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
| 0 | 5340 char *addr, size_t bytes, bool read_only, |
| 5341 bool allow_exec) { | |
| 5342 // same as map_memory() on this OS | |
| 5343 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, | |
| 5344 allow_exec); | |
| 5345 } | |
| 5346 | |
| 5347 | |
| 5348 // Unmap a block of memory. | |
| 6197 | 5349 bool os::pd_unmap_memory(char* addr, size_t bytes) { |
| 0 | 5350 return munmap(addr, bytes) == 0; |
| 5351 } | |
| 5352 | |
| 5353 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time); | |
| 5354 | |
| 5355 static clockid_t thread_cpu_clockid(Thread* thread) { | |
| 5356 pthread_t tid = thread->osthread()->pthread_id(); | |
| 5357 clockid_t clockid; | |
| 5358 | |
| 5359 // Get thread clockid | |
| 5360 int rc = os::Linux::pthread_getcpuclockid(tid, &clockid); | |
| 5361 assert(rc == 0, "pthread_getcpuclockid is expected to return 0 code"); | |
| 5362 return clockid; | |
| 5363 } | |
| 5364 | |
| 5365 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) | |
| 5366 // are used by JVM M&M and JVMTI to get user+sys or user CPU time | |
| 5367 // of a thread. | |
| 5368 // | |
| 5369 // current_thread_cpu_time() and thread_cpu_time(Thread*) returns | |
| 5370 // the fast estimate available on the platform. | |
| 5371 | |
| 5372 jlong os::current_thread_cpu_time() { | |
| 5373 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 5374 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 5375 } else { | |
| 5376 // return user + sys since the cost is the same | |
| 5377 return slow_thread_cpu_time(Thread::current(), true /* user + sys */); | |
| 5378 } | |
| 5379 } | |
| 5380 | |
| 5381 jlong os::thread_cpu_time(Thread* thread) { | |
| 5382 // consistent with what current_thread_cpu_time() returns | |
| 5383 if (os::Linux::supports_fast_thread_cpu_time()) { | |
| 5384 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 5385 } else { | |
| 5386 return slow_thread_cpu_time(thread, true /* user + sys */); | |
| 5387 } | |
| 5388 } | |
| 5389 | |
| 5390 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { | |
| 5391 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 5392 return os::Linux::fast_thread_cpu_time(CLOCK_THREAD_CPUTIME_ID); | |
| 5393 } else { | |
| 5394 return slow_thread_cpu_time(Thread::current(), user_sys_cpu_time); | |
| 5395 } | |
| 5396 } | |
| 5397 | |
| 5398 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5399 if (user_sys_cpu_time && os::Linux::supports_fast_thread_cpu_time()) { | |
| 5400 return os::Linux::fast_thread_cpu_time(thread_cpu_clockid(thread)); | |
| 5401 } else { | |
| 5402 return slow_thread_cpu_time(thread, user_sys_cpu_time); | |
| 5403 } | |
| 5404 } | |
| 5405 | |
| 5406 // | |
| 5407 // -1 on error. | |
| 5408 // | |
| 5409 | |
| 5410 static jlong slow_thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { | |
| 5411 static bool proc_task_unchecked = true; | |
| 5412 static const char *proc_stat_path = "/proc/%d/stat"; | |
| 5413 pid_t tid = thread->osthread()->thread_id(); | |
| 5414 char *s; | |
| 5415 char stat[2048]; | |
| 5416 int statlen; | |
| 5417 char proc_name[64]; | |
| 5418 int count; | |
| 5419 long sys_time, user_time; | |
|
1681
126ea7725993
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bobv
parents:
1642
diff
changeset
|
5420 char cdummy; |
| 0 | 5421 int idummy; |
| 5422 long ldummy; | |
| 5423 FILE *fp; | |
| 5424 | |
| 5425 // The /proc/<tid>/stat aggregates per-process usage on | |
| 5426 // new Linux kernels 2.6+ where NPTL is supported. | |
| 5427 // The /proc/self/task/<tid>/stat still has the per-thread usage. | |
| 5428 // 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
|
5429 // 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
|
5430 // /proc/self/task, so we check its availability. |
| 0 | 5431 if (proc_task_unchecked && os::Linux::is_NPTL()) { |
| 5432 // This is executed only once | |
| 5433 proc_task_unchecked = false; | |
| 5434 fp = fopen("/proc/self/task", "r"); | |
| 5435 if (fp != NULL) { | |
| 5436 proc_stat_path = "/proc/self/task/%d/stat"; | |
| 5437 fclose(fp); | |
| 5438 } | |
| 5439 } | |
| 5440 | |
| 5441 sprintf(proc_name, proc_stat_path, tid); | |
| 5442 fp = fopen(proc_name, "r"); | |
| 5443 if ( fp == NULL ) return -1; | |
| 5444 statlen = fread(stat, 1, 2047, fp); | |
| 5445 stat[statlen] = '\0'; | |
| 5446 fclose(fp); | |
| 5447 | |
| 5448 // Skip pid and the command string. Note that we could be dealing with | |
| 5449 // weird command names, e.g. user could decide to rename java launcher | |
| 5450 // to "java 1.4.2 :)", then the stat file would look like | |
| 5451 // 1234 (java 1.4.2 :)) R ... ... | |
| 5452 // We don't really need to know the command string, just find the last | |
| 5453 // occurrence of ")" and then start parsing from there. See bug 4726580. | |
| 5454 s = strrchr(stat, ')'); | |
| 5455 if (s == NULL ) return -1; | |
| 5456 | |
| 5457 // Skip blank chars | |
| 5458 do s++; while (isspace(*s)); | |
| 5459 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
5460 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
|
5461 &cdummy, &idummy, &idummy, &idummy, &idummy, &idummy, |
| 0 | 5462 &ldummy, &ldummy, &ldummy, &ldummy, &ldummy, |
| 5463 &user_time, &sys_time); | |
|
1681
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bobv
parents:
1642
diff
changeset
|
5464 if ( count != 13 ) return -1; |
| 0 | 5465 if (user_sys_cpu_time) { |
| 5466 return ((jlong)sys_time + (jlong)user_time) * (1000000000 / clock_tics_per_sec); | |
| 5467 } else { | |
| 5468 return (jlong)user_time * (1000000000 / clock_tics_per_sec); | |
| 5469 } | |
| 5470 } | |
| 5471 | |
| 5472 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5473 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5474 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5475 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5476 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 5477 } | |
| 5478 | |
| 5479 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { | |
| 5480 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits | |
| 5481 info_ptr->may_skip_backward = false; // elapsed time not wall time | |
| 5482 info_ptr->may_skip_forward = false; // elapsed time not wall time | |
| 5483 info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned | |
| 5484 } | |
| 5485 | |
| 5486 bool os::is_thread_cpu_time_supported() { | |
| 5487 return true; | |
| 5488 } | |
| 5489 | |
| 5490 // System loadavg support. Returns -1 if load average cannot be obtained. | |
| 5491 // Linux doesn't yet have a (official) notion of processor sets, | |
| 5492 // so just return the system wide load average. | |
| 5493 int os::loadavg(double loadavg[], int nelem) { | |
| 5494 return ::getloadavg(loadavg, nelem); | |
| 5495 } | |
| 5496 | |
| 5497 void os::pause() { | |
| 5498 char filename[MAX_PATH]; | |
| 5499 if (PauseAtStartupFile && PauseAtStartupFile[0]) { | |
| 5500 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); | |
| 5501 } else { | |
| 5502 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); | |
| 5503 } | |
| 5504 | |
| 5505 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
| 5506 if (fd != -1) { | |
| 5507 struct stat buf; | |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
5508 ::close(fd); |
| 0 | 5509 while (::stat(filename, &buf) == 0) { |
| 5510 (void)::poll(NULL, 0, 100); | |
| 5511 } | |
| 5512 } else { | |
| 5513 jio_fprintf(stderr, | |
| 5514 "Could not open pause file '%s', continuing immediately.\n", filename); | |
| 5515 } | |
| 5516 } | |
| 5517 | |
| 5518 | |
| 5519 // Refer to the comments in os_solaris.cpp park-unpark. | |
| 5520 // | |
| 5521 // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can | |
| 5522 // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. | |
| 5523 // For specifics regarding the bug see GLIBC BUGID 261237 : | |
| 5524 // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. | |
| 5525 // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future | |
| 5526 // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar | |
| 5527 // is used. (The simple C test-case provided in the GLIBC bug report manifests the | |
| 5528 // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() | |
| 5529 // and monitorenter when we're using 1-0 locking. All those operations may result in | |
| 5530 // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version | |
| 5531 // of libpthread avoids the problem, but isn't practical. | |
| 5532 // | |
| 5533 // Possible remedies: | |
| 5534 // | |
| 5535 // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. | |
| 5536 // This is palliative and probabilistic, however. If the thread is preempted | |
| 5537 // between the call to compute_abstime() and pthread_cond_timedwait(), more | |
| 5538 // than the minimum period may have passed, and the abstime may be stale (in the | |
| 5539 // past) resultin in a hang. Using this technique reduces the odds of a hang | |
| 5540 // but the JVM is still vulnerable, particularly on heavily loaded systems. | |
| 5541 // | |
| 5542 // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead | |
| 5543 // of the usual flag-condvar-mutex idiom. The write side of the pipe is set | |
| 5544 // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) | |
| 5545 // reduces to poll()+read(). This works well, but consumes 2 FDs per extant | |
| 5546 // thread. | |
| 5547 // | |
| 5548 // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread | |
| 5549 // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing | |
| 5550 // a timeout request to the chron thread and then blocking via pthread_cond_wait(). | |
| 5551 // This also works well. In fact it avoids kernel-level scalability impediments | |
| 5552 // on certain platforms that don't handle lots of active pthread_cond_timedwait() | |
| 5553 // timers in a graceful fashion. | |
| 5554 // | |
| 5555 // 4. When the abstime value is in the past it appears that control returns | |
| 5556 // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. | |
| 5557 // Subsequent timedwait/wait calls may hang indefinitely. Given that, we | |
| 5558 // can avoid the problem by reinitializing the condvar -- by cond_destroy() | |
| 5559 // followed by cond_init() -- after all calls to pthread_cond_timedwait(). | |
| 5560 // It may be possible to avoid reinitialization by checking the return | |
| 5561 // value from pthread_cond_timedwait(). In addition to reinitializing the | |
| 5562 // condvar we must establish the invariant that cond_signal() is only called | |
| 5563 // within critical sections protected by the adjunct mutex. This prevents | |
| 5564 // cond_signal() from "seeing" a condvar that's in the midst of being | |
| 5565 // reinitialized or that is corrupt. Sadly, this invariant obviates the | |
| 5566 // desirable signal-after-unlock optimization that avoids futile context switching. | |
| 5567 // | |
| 5568 // I'm also concerned that some versions of NTPL might allocate an auxilliary | |
| 5569 // structure when a condvar is used or initialized. cond_destroy() would | |
| 5570 // release the helper structure. Our reinitialize-after-timedwait fix | |
| 5571 // put excessive stress on malloc/free and locks protecting the c-heap. | |
| 5572 // | |
| 5573 // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. | |
| 5574 // It may be possible to refine (4) by checking the kernel and NTPL verisons | |
| 5575 // and only enabling the work-around for vulnerable environments. | |
| 5576 | |
| 5577 // utility to compute the abstime argument to timedwait: | |
| 5578 // millis is the relative timeout time | |
| 5579 // abstime will be the absolute timeout time | |
| 5580 // TODO: replace compute_abstime() with unpackTime() | |
| 5581 | |
| 5582 static struct timespec* compute_abstime(timespec* abstime, jlong millis) { | |
| 5583 if (millis < 0) millis = 0; | |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5584 |
| 0 | 5585 jlong seconds = millis / 1000; |
| 5586 millis %= 1000; | |
| 5587 if (seconds > 50000000) { // see man cond_timedwait(3T) | |
| 5588 seconds = 50000000; | |
| 5589 } | |
|
12211
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12182
diff
changeset
|
5590 |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5591 if (os::Linux::supports_monotonic_clock()) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5592 struct timespec now; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5593 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5594 assert_status(status == 0, status, "clock_gettime"); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5595 abstime->tv_sec = now.tv_sec + seconds; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5596 long nanos = now.tv_nsec + millis * NANOSECS_PER_MILLISEC; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5597 if (nanos >= NANOSECS_PER_SEC) { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5598 abstime->tv_sec += 1; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5599 nanos -= NANOSECS_PER_SEC; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5600 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5601 abstime->tv_nsec = nanos; |
|
2e6938dd68f2
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|
5602 } else { |
|
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|
5603 struct timeval now; |
|
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|
5604 int status = gettimeofday(&now, NULL); |
|
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|
5605 assert(status == 0, "gettimeofday"); |
|
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|
5606 abstime->tv_sec = now.tv_sec + seconds; |
|
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|
5607 long usec = now.tv_usec + millis * 1000; |
|
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|
5608 if (usec >= 1000000) { |
|
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|
5609 abstime->tv_sec += 1; |
|
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|
5610 usec -= 1000000; |
|
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|
5611 } |
|
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|
5612 abstime->tv_nsec = usec * 1000; |
|
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|
5613 } |
| 0 | 5614 return abstime; |
| 5615 } | |
| 5616 | |
| 5617 | |
| 5618 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. | |
| 5619 // Conceptually TryPark() should be equivalent to park(0). | |
| 5620 | |
| 5621 int os::PlatformEvent::TryPark() { | |
| 5622 for (;;) { | |
| 5623 const int v = _Event ; | |
| 5624 guarantee ((v == 0) || (v == 1), "invariant") ; | |
| 5625 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; | |
| 5626 } | |
| 5627 } | |
| 5628 | |
| 5629 void os::PlatformEvent::park() { // AKA "down()" | |
| 5630 // Invariant: Only the thread associated with the Event/PlatformEvent | |
| 5631 // may call park(). | |
| 5632 // TODO: assert that _Assoc != NULL or _Assoc == Self | |
| 5633 int v ; | |
| 5634 for (;;) { | |
| 5635 v = _Event ; | |
| 5636 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5637 } | |
| 5638 guarantee (v >= 0, "invariant") ; | |
| 5639 if (v == 0) { | |
| 5640 // Do this the hard way by blocking ... | |
| 5641 int status = pthread_mutex_lock(_mutex); | |
| 5642 assert_status(status == 0, status, "mutex_lock"); | |
| 5643 guarantee (_nParked == 0, "invariant") ; | |
| 5644 ++ _nParked ; | |
| 5645 while (_Event < 0) { | |
| 5646 status = pthread_cond_wait(_cond, _mutex); | |
| 5647 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... | |
| 5648 // Treat this the same as if the wait was interrupted | |
| 5649 if (status == ETIME) { status = EINTR; } | |
| 5650 assert_status(status == 0 || status == EINTR, status, "cond_wait"); | |
| 5651 } | |
| 5652 -- _nParked ; | |
| 5653 | |
| 5654 _Event = 0 ; | |
| 5655 status = pthread_mutex_unlock(_mutex); | |
| 5656 assert_status(status == 0, status, "mutex_unlock"); | |
|
7629
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|
5657 // Paranoia to ensure our locked and lock-free paths interact |
|
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|
5658 // correctly with each other. |
|
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|
5659 OrderAccess::fence(); |
| 0 | 5660 } |
| 5661 guarantee (_Event >= 0, "invariant") ; | |
| 5662 } | |
| 5663 | |
| 5664 int os::PlatformEvent::park(jlong millis) { | |
| 5665 guarantee (_nParked == 0, "invariant") ; | |
| 5666 | |
| 5667 int v ; | |
| 5668 for (;;) { | |
| 5669 v = _Event ; | |
| 5670 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; | |
| 5671 } | |
| 5672 guarantee (v >= 0, "invariant") ; | |
| 5673 if (v != 0) return OS_OK ; | |
| 5674 | |
| 5675 // We do this the hard way, by blocking the thread. | |
| 5676 // Consider enforcing a minimum timeout value. | |
| 5677 struct timespec abst; | |
| 5678 compute_abstime(&abst, millis); | |
| 5679 | |
| 5680 int ret = OS_TIMEOUT; | |
| 5681 int status = pthread_mutex_lock(_mutex); | |
| 5682 assert_status(status == 0, status, "mutex_lock"); | |
| 5683 guarantee (_nParked == 0, "invariant") ; | |
| 5684 ++_nParked ; | |
| 5685 | |
| 5686 // Object.wait(timo) will return because of | |
| 5687 // (a) notification | |
| 5688 // (b) timeout | |
| 5689 // (c) thread.interrupt | |
| 5690 // | |
| 5691 // Thread.interrupt and object.notify{All} both call Event::set. | |
| 5692 // That is, we treat thread.interrupt as a special case of notification. | |
| 5693 // The underlying Solaris implementation, cond_timedwait, admits | |
| 5694 // spurious/premature wakeups, but the JLS/JVM spec prevents the | |
| 5695 // JVM from making those visible to Java code. As such, we must | |
| 5696 // filter out spurious wakeups. We assume all ETIME returns are valid. | |
| 5697 // | |
| 5698 // TODO: properly differentiate simultaneous notify+interrupt. | |
| 5699 // In that case, we should propagate the notify to another waiter. | |
| 5700 | |
| 5701 while (_Event < 0) { | |
| 5702 status = os::Linux::safe_cond_timedwait(_cond, _mutex, &abst); | |
| 5703 if (status != 0 && WorkAroundNPTLTimedWaitHang) { | |
| 5704 pthread_cond_destroy (_cond); | |
|
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|
5705 pthread_cond_init (_cond, os::Linux::condAttr()) ; |
| 0 | 5706 } |
| 5707 assert_status(status == 0 || status == EINTR || | |
| 5708 status == ETIME || status == ETIMEDOUT, | |
| 5709 status, "cond_timedwait"); | |
| 5710 if (!FilterSpuriousWakeups) break ; // previous semantics | |
| 5711 if (status == ETIME || status == ETIMEDOUT) break ; | |
| 5712 // We consume and ignore EINTR and spurious wakeups. | |
| 5713 } | |
| 5714 --_nParked ; | |
| 5715 if (_Event >= 0) { | |
| 5716 ret = OS_OK; | |
| 5717 } | |
| 5718 _Event = 0 ; | |
| 5719 status = pthread_mutex_unlock(_mutex); | |
| 5720 assert_status(status == 0, status, "mutex_unlock"); | |
| 5721 assert (_nParked == 0, "invariant") ; | |
|
7629
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|
5722 // Paranoia to ensure our locked and lock-free paths interact |
|
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|
5723 // correctly with each other. |
|
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|
5724 OrderAccess::fence(); |
| 0 | 5725 return ret; |
| 5726 } | |
| 5727 | |
| 5728 void os::PlatformEvent::unpark() { | |
|
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|
5729 // Transitions for _Event: |
|
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|
5730 // 0 :=> 1 |
|
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|
5731 // 1 :=> 1 |
|
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|
5732 // -1 :=> either 0 or 1; must signal target thread |
|
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|
5733 // That is, we can safely transition _Event from -1 to either |
|
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|
5734 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back |
|
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|
5735 // unpark() calls. |
|
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|
5736 // See also: "Semaphores in Plan 9" by Mullender & Cox |
|
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|
5737 // |
|
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|
5738 // Note: Forcing a transition from "-1" to "1" on an unpark() means |
|
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|
5739 // that it will take two back-to-back park() calls for the owning |
|
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|
5740 // thread to block. This has the benefit of forcing a spurious return |
|
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|
5741 // from the first park() call after an unpark() call which will help |
|
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|
5742 // shake out uses of park() and unpark() without condition variables. |
|
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|
5743 |
|
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|
5744 if (Atomic::xchg(1, &_Event) >= 0) return; |
|
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|
5745 |
|
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|
5746 // Wait for the thread associated with the event to vacate |
|
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|
5747 int status = pthread_mutex_lock(_mutex); |
|
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|
5748 assert_status(status == 0, status, "mutex_lock"); |
|
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|
5749 int AnyWaiters = _nParked; |
|
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|
5750 assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
|
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|
5751 if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
|
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|
5752 AnyWaiters = 0; |
|
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|
5753 pthread_cond_signal(_cond); |
|
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|
5754 } |
|
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|
5755 status = pthread_mutex_unlock(_mutex); |
|
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|
5756 assert_status(status == 0, status, "mutex_unlock"); |
|
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|
5757 if (AnyWaiters != 0) { |
|
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|
5758 status = pthread_cond_signal(_cond); |
|
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|
5759 assert_status(status == 0, status, "cond_signal"); |
| 0 | 5760 } |
| 5761 | |
| 5762 // Note that we signal() _after dropping the lock for "immortal" Events. | |
| 5763 // This is safe and avoids a common class of futile wakeups. In rare | |
| 5764 // circumstances this can cause a thread to return prematurely from | |
| 5765 // cond_{timed}wait() but the spurious wakeup is benign and the victim will | |
| 5766 // simply re-test the condition and re-park itself. | |
| 5767 } | |
| 5768 | |
| 5769 | |
| 5770 // JSR166 | |
| 5771 // ------------------------------------------------------- | |
| 5772 | |
| 5773 /* | |
| 5774 * The solaris and linux implementations of park/unpark are fairly | |
| 5775 * conservative for now, but can be improved. They currently use a | |
| 5776 * mutex/condvar pair, plus a a count. | |
| 5777 * Park decrements count if > 0, else does a condvar wait. Unpark | |
| 5778 * sets count to 1 and signals condvar. Only one thread ever waits | |
| 5779 * on the condvar. Contention seen when trying to park implies that someone | |
| 5780 * is unparking you, so don't wait. And spurious returns are fine, so there | |
| 5781 * is no need to track notifications. | |
| 5782 */ | |
| 5783 | |
| 5784 #define MAX_SECS 100000000 | |
| 5785 /* | |
| 5786 * This code is common to linux and solaris and will be moved to a | |
| 5787 * common place in dolphin. | |
| 5788 * | |
| 5789 * The passed in time value is either a relative time in nanoseconds | |
| 5790 * or an absolute time in milliseconds. Either way it has to be unpacked | |
| 5791 * into suitable seconds and nanoseconds components and stored in the | |
| 5792 * given timespec structure. | |
| 5793 * Given time is a 64-bit value and the time_t used in the timespec is only | |
| 5794 * a signed-32-bit value (except on 64-bit Linux) we have to watch for | |
| 5795 * overflow if times way in the future are given. Further on Solaris versions | |
| 5796 * prior to 10 there is a restriction (see cond_timedwait) that the specified | |
| 5797 * number of seconds, in abstime, is less than current_time + 100,000,000. | |
| 5798 * As it will be 28 years before "now + 100000000" will overflow we can | |
| 5799 * ignore overflow and just impose a hard-limit on seconds using the value | |
| 5800 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 | |
| 5801 * years from "now". | |
| 5802 */ | |
| 5803 | |
| 5804 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { | |
| 5805 assert (time > 0, "convertTime"); | |
|
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|
5806 time_t max_secs = 0; |
|
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|
5807 |
|
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|
5808 if (!os::Linux::supports_monotonic_clock() || isAbsolute) { |
|
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|
5809 struct timeval now; |
|
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|
5810 int status = gettimeofday(&now, NULL); |
|
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|
5811 assert(status == 0, "gettimeofday"); |
|
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|
5812 |
|
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|
5813 max_secs = now.tv_sec + MAX_SECS; |
|
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|
5814 |
|
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|
5815 if (isAbsolute) { |
|
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|
5816 jlong secs = time / 1000; |
|
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|
5817 if (secs > max_secs) { |
|
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|
5818 absTime->tv_sec = max_secs; |
|
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|
5819 } else { |
|
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|
5820 absTime->tv_sec = secs; |
|
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|
5821 } |
|
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|
5822 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
|
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|
5823 } else { |
|
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|
5824 jlong secs = time / NANOSECS_PER_SEC; |
|
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|
5825 if (secs >= MAX_SECS) { |
|
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|
5826 absTime->tv_sec = max_secs; |
|
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|
5827 absTime->tv_nsec = 0; |
|
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|
5828 } else { |
|
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|
5829 absTime->tv_sec = now.tv_sec + secs; |
|
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|
5830 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
|
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12182
diff
changeset
|
5831 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
|
2e6938dd68f2
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12182
diff
changeset
|
5832 absTime->tv_nsec -= NANOSECS_PER_SEC; |
|
2e6938dd68f2
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12182
diff
changeset
|
5833 ++absTime->tv_sec; // note: this must be <= max_secs |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5834 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5835 } |
| 0 | 5836 } |
|
12211
2e6938dd68f2
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12182
diff
changeset
|
5837 } else { |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5838 // must be relative using monotonic clock |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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parents:
12182
diff
changeset
|
5839 struct timespec now; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5840 int status = os::Linux::clock_gettime(CLOCK_MONOTONIC, &now); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5841 assert_status(status == 0, status, "clock_gettime"); |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5842 max_secs = now.tv_sec + MAX_SECS; |
| 0 | 5843 jlong secs = time / NANOSECS_PER_SEC; |
| 5844 if (secs >= MAX_SECS) { | |
| 5845 absTime->tv_sec = max_secs; | |
| 5846 absTime->tv_nsec = 0; | |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5847 } else { |
| 0 | 5848 absTime->tv_sec = now.tv_sec + secs; |
|
12211
2e6938dd68f2
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12182
diff
changeset
|
5849 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_nsec; |
| 0 | 5850 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
| 5851 absTime->tv_nsec -= NANOSECS_PER_SEC; | |
| 5852 ++absTime->tv_sec; // note: this must be <= max_secs | |
| 5853 } | |
| 5854 } | |
| 5855 } | |
| 5856 assert(absTime->tv_sec >= 0, "tv_sec < 0"); | |
| 5857 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); | |
| 5858 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); | |
| 5859 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); | |
| 5860 } | |
| 5861 | |
| 5862 void Parker::park(bool isAbsolute, jlong time) { | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5863 // Ideally we'd do something useful while spinning, such |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5864 // as calling unpackTime(). |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5865 |
| 0 | 5866 // Optional fast-path check: |
| 5867 // Return immediately if a permit is available. | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5868 // We depend on Atomic::xchg() having full barrier semantics |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5869 // since we are doing a lock-free update to _counter. |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5870 if (Atomic::xchg(0, &_counter) > 0) return; |
| 0 | 5871 |
| 5872 Thread* thread = Thread::current(); | |
| 5873 assert(thread->is_Java_thread(), "Must be JavaThread"); | |
| 5874 JavaThread *jt = (JavaThread *)thread; | |
| 5875 | |
| 5876 // Optional optimization -- avoid state transitions if there's an interrupt pending. | |
| 5877 // Check interrupt before trying to wait | |
| 5878 if (Thread::is_interrupted(thread, false)) { | |
| 5879 return; | |
| 5880 } | |
| 5881 | |
| 5882 // Next, demultiplex/decode time arguments | |
| 5883 timespec absTime; | |
|
1865
1c352af0135d
6763959: java.util.concurrent.locks.LockSupport.parkUntil(0) blocks forever
acorn
parents:
1750
diff
changeset
|
5884 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
| 0 | 5885 return; |
| 5886 } | |
| 5887 if (time > 0) { | |
| 5888 unpackTime(&absTime, isAbsolute, time); | |
| 5889 } | |
| 5890 | |
| 5891 | |
| 5892 // Enter safepoint region | |
| 5893 // Beware of deadlocks such as 6317397. | |
| 5894 // The per-thread Parker:: mutex is a classic leaf-lock. | |
| 5895 // In particular a thread must never block on the Threads_lock while | |
| 5896 // holding the Parker:: mutex. If safepoints are pending both the | |
| 5897 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. | |
| 5898 ThreadBlockInVM tbivm(jt); | |
| 5899 | |
| 5900 // Don't wait if cannot get lock since interference arises from | |
| 5901 // unblocking. Also. check interrupt before trying wait | |
| 5902 if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { | |
| 5903 return; | |
| 5904 } | |
| 5905 | |
| 5906 int status ; | |
| 5907 if (_counter > 0) { // no wait needed | |
| 5908 _counter = 0; | |
| 5909 status = pthread_mutex_unlock(_mutex); | |
| 5910 assert (status == 0, "invariant") ; | |
|
7629
22ba8c8ce6a6
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parents:
7456
diff
changeset
|
5911 // Paranoia to ensure our locked and lock-free paths interact |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5912 // correctly with each other and Java-level accesses. |
|
1117
95e9083cf4a7
6822370: ReentrantReadWriteLock: threads hung when there are no threads holding onto the lock (Netra x4450)
dholmes
parents:
1010
diff
changeset
|
5913 OrderAccess::fence(); |
| 0 | 5914 return; |
| 5915 } | |
| 5916 | |
| 5917 #ifdef ASSERT | |
| 5918 // Don't catch signals while blocked; let the running threads have the signals. | |
| 5919 // (This allows a debugger to break into the running thread.) | |
| 5920 sigset_t oldsigs; | |
| 5921 sigset_t* allowdebug_blocked = os::Linux::allowdebug_blocked_signals(); | |
| 5922 pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); | |
| 5923 #endif | |
| 5924 | |
| 5925 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); | |
| 5926 jt->set_suspend_equivalent(); | |
| 5927 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() | |
| 5928 | |
|
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
|
5929 assert(_cur_index == -1, "invariant"); |
| 0 | 5930 if (time == 0) { |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5931 _cur_index = REL_INDEX; // arbitrary choice when not timed |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
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12182
diff
changeset
|
5932 status = pthread_cond_wait (&_cond[_cur_index], _mutex) ; |
| 0 | 5933 } else { |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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12182
diff
changeset
|
5934 _cur_index = isAbsolute ? ABS_INDEX : REL_INDEX; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5935 status = os::Linux::safe_cond_timedwait (&_cond[_cur_index], _mutex, &absTime) ; |
| 0 | 5936 if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5937 pthread_cond_destroy (&_cond[_cur_index]) ; |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5938 pthread_cond_init (&_cond[_cur_index], isAbsolute ? NULL : os::Linux::condAttr()); |
| 0 | 5939 } |
| 5940 } | |
|
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
|
5941 _cur_index = -1; |
| 0 | 5942 assert_status(status == 0 || status == EINTR || |
| 5943 status == ETIME || status == ETIMEDOUT, | |
| 5944 status, "cond_timedwait"); | |
| 5945 | |
| 5946 #ifdef ASSERT | |
| 5947 pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); | |
| 5948 #endif | |
| 5949 | |
| 5950 _counter = 0 ; | |
| 5951 status = pthread_mutex_unlock(_mutex) ; | |
| 5952 assert_status(status == 0, status, "invariant") ; | |
|
7629
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5953 // Paranoia to ensure our locked and lock-free paths interact |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5954 // correctly with each other and Java-level accesses. |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5955 OrderAccess::fence(); |
|
22ba8c8ce6a6
8004902: correctness fixes motivated by contended locking work (6607129)
dcubed
parents:
7456
diff
changeset
|
5956 |
| 0 | 5957 // If externally suspended while waiting, re-suspend |
| 5958 if (jt->handle_special_suspend_equivalent_condition()) { | |
| 5959 jt->java_suspend_self(); | |
| 5960 } | |
| 5961 } | |
| 5962 | |
| 5963 void Parker::unpark() { | |
| 5964 int s, status ; | |
| 5965 status = pthread_mutex_lock(_mutex); | |
| 5966 assert (status == 0, "invariant") ; | |
| 5967 s = _counter; | |
| 5968 _counter = 1; | |
| 5969 if (s < 1) { | |
|
12211
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5970 // thread might be parked |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
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parents:
12182
diff
changeset
|
5971 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
|
5972 // 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
|
5973 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
|
5974 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
|
5975 assert (status == 0, "invariant"); |
| 0 | 5976 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
|
5977 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
|
5978 } else { |
| 0 | 5979 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
|
5980 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
|
5981 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
|
5982 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
|
5983 } |
|
2e6938dd68f2
6900441: PlatformEvent.park(millis) on Linux could still be affected by changes to the time-of-day clock
dholmes
parents:
12182
diff
changeset
|
5984 } 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
|
5985 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
|
5986 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
|
5987 } |
| 0 | 5988 } else { |
| 5989 pthread_mutex_unlock(_mutex); | |
| 5990 assert (status == 0, "invariant") ; | |
| 5991 } | |
| 5992 } | |
| 5993 | |
| 5994 | |
| 5995 extern char** environ; | |
| 5996 | |
| 5997 #ifndef __NR_fork | |
| 5998 #define __NR_fork IA32_ONLY(2) IA64_ONLY(not defined) AMD64_ONLY(57) | |
| 5999 #endif | |
| 6000 | |
| 6001 #ifndef __NR_execve | |
| 6002 #define __NR_execve IA32_ONLY(11) IA64_ONLY(1033) AMD64_ONLY(59) | |
| 6003 #endif | |
| 6004 | |
| 6005 // Run the specified command in a separate process. Return its exit value, | |
| 6006 // or -1 on failure (e.g. can't fork a new process). | |
| 6007 // Unlike system(), this function can be called from signal handler. It | |
| 6008 // doesn't block SIGINT et al. | |
| 6009 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
|
6010 const char * argv[4] = {"sh", "-c", cmd, NULL}; |
| 0 | 6011 |
| 6012 // fork() in LinuxThreads/NPTL is not async-safe. It needs to run | |
| 6013 // pthread_atfork handlers and reset pthread library. All we need is a | |
| 6014 // separate process to execve. Make a direct syscall to fork process. | |
| 6015 // On IA64 there's no fork syscall, we have to use fork() and hope for | |
| 6016 // the best... | |
| 6017 pid_t pid = NOT_IA64(syscall(__NR_fork);) | |
| 6018 IA64_ONLY(fork();) | |
| 6019 | |
| 6020 if (pid < 0) { | |
| 6021 // fork failed | |
| 6022 return -1; | |
| 6023 | |
| 6024 } else if (pid == 0) { | |
| 6025 // child process | |
| 6026 | |
| 6027 // execve() in LinuxThreads will call pthread_kill_other_threads_np() | |
| 6028 // first to kill every thread on the thread list. Because this list is | |
| 6029 // not reset by fork() (see notes above), execve() will instead kill | |
| 6030 // every thread in the parent process. We know this is the only thread | |
| 6031 // in the new process, so make a system call directly. | |
| 6032 // IA64 should use normal execve() from glibc to match the glibc fork() | |
| 6033 // above. | |
| 6034 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
|
6035 IA64_ONLY(execve("/bin/sh", (char* const*)argv, environ);) |
| 0 | 6036 |
| 6037 // execve failed | |
| 6038 _exit(-1); | |
| 6039 | |
| 6040 } else { | |
| 6041 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't | |
| 6042 // care about the actual exit code, for now. | |
| 6043 | |
| 6044 int status; | |
| 6045 | |
| 6046 // Wait for the child process to exit. This returns immediately if | |
| 6047 // the child has already exited. */ | |
| 6048 while (waitpid(pid, &status, 0) < 0) { | |
| 6049 switch (errno) { | |
| 6050 case ECHILD: return 0; | |
| 6051 case EINTR: break; | |
| 6052 default: return -1; | |
| 6053 } | |
| 6054 } | |
| 6055 | |
| 6056 if (WIFEXITED(status)) { | |
| 6057 // The child exited normally; get its exit code. | |
| 6058 return WEXITSTATUS(status); | |
| 6059 } else if (WIFSIGNALED(status)) { | |
| 6060 // The child exited because of a signal | |
| 6061 // The best value to return is 0x80 + signal number, | |
| 6062 // because that is what all Unix shells do, and because | |
| 6063 // it allows callers to distinguish between process exit and | |
| 6064 // process death by signal. | |
| 6065 return 0x80 + WTERMSIG(status); | |
| 6066 } else { | |
| 6067 // Unknown exit code; pass it through | |
| 6068 return status; | |
| 6069 } | |
| 6070 } | |
| 6071 } | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6072 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6073 // is_headless_jre() |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6074 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6075 // 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
|
6076 // 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
|
6077 // |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6078 // 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
|
6079 // 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
|
6080 // |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6081 bool os::is_headless_jre() { |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6082 struct stat statbuf; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6083 char buf[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6084 char libmawtpath[MAXPATHLEN]; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6085 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
|
6086 const char *new_xawtstr = "/libawt_xawt.so"; |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6087 char *p; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6088 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6089 // Get path to libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6090 os::jvm_path(buf, sizeof(buf)); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6091 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6092 // Get rid of libjvm.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6093 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6094 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6095 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6096 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6097 // Get rid of client or server |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6098 p = strrchr(buf, '/'); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6099 if (p == NULL) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6100 else *p = '\0'; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6101 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6102 // check xawt/libmawt.so |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6103 strcpy(libmawtpath, buf); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6104 strcat(libmawtpath, xawtstr); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6105 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6106 |
|
4082
36b057451829
7110017: is_headless_jre should be updated to reflect the new location of awt toolkit libraries
dholmes
parents:
4006
diff
changeset
|
6107 // check libawt_xawt.so |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6108 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
|
6109 strcat(libmawtpath, new_xawtstr); |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6110 if (::stat(libmawtpath, &statbuf) == 0) return false; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6111 |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6112 return true; |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6113 } |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1642
diff
changeset
|
6114 |
|
6200
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6115 // Get the default path to the core file |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6116 // Returns the length of the string |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6117 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
|
6118 const char* p = get_current_directory(buffer, bufferSize); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6119 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6120 if (p == NULL) { |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6121 assert(p != NULL, "failed to get current directory"); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6122 return 0; |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6123 } |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6124 |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6125 return strlen(buffer); |
|
65906dc96aa1
7129724: MAC: Core file location is wrong in crash report
mikael
parents:
6197
diff
changeset
|
6126 } |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6127 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6128 #ifdef JAVASE_EMBEDDED |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6129 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6130 // 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
|
6131 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6132 MemNotifyThread* MemNotifyThread::_memnotify_thread = NULL; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6133 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6134 // ctor |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6135 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6136 MemNotifyThread::MemNotifyThread(int fd): Thread() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6137 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
|
6138 _fd = fd; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6139 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6140 if (os::create_thread(this, os::os_thread)) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6141 _memnotify_thread = this; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6142 os::set_priority(this, NearMaxPriority); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6143 os::start_thread(this); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6144 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6145 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6146 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6147 // Where all the work gets done |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6148 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6149 void MemNotifyThread::run() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6150 assert(this == memnotify_thread(), "expected the singleton MemNotifyThread"); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6151 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6152 // Set up the select arguments |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6153 fd_set rfds; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6154 if (_fd != -1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6155 FD_ZERO(&rfds); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6156 FD_SET(_fd, &rfds); |
|
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 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6159 // Now wait for the mem_notify device to wake up |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6160 while (1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6161 // Wait for the mem_notify device to signal us.. |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6162 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
|
6163 if (rc == -1) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6164 perror("select!\n"); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6165 break; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6166 } else if (rc) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6167 //ssize_t free_before = os::available_memory(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6168 //tty->print ("Notified: Free: %dK \n",os::available_memory()/1024); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6169 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6170 // 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
|
6171 // try to do something about that |
|
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 // 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
|
6174 if (!Universe::heap()->is_gc_active()) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6175 Universe::heap()->collect(GCCause::_allocation_failure); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6176 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6177 //ssize_t free_after = os::available_memory(); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6178 //tty->print ("Post-Notify: Free: %dK\n",free_after/1024); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6179 //tty->print ("GC freed: %dK\n", (free_after - free_before)/1024); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6180 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6181 // We might want to do something like the following if we find the GC's are not helping... |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6182 // 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
|
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 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6186 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6187 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6188 // See if the /dev/mem_notify device exists, and if so, start a thread to monitor it. |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6189 // |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6190 void MemNotifyThread::start() { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6191 int fd; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6192 fd = open ("/dev/mem_notify", O_RDONLY, 0); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6193 if (fd < 0) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6194 return; |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6195 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6196 |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6197 if (memnotify_thread() == NULL) { |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6198 new MemNotifyThread(fd); |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6199 } |
|
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6200 } |
| 10405 | 6201 |
|
3802
b0b8491925fe
7061212: use o/s low memory notification in embedded builds
jcoomes
parents:
3800
diff
changeset
|
6202 #endif // JAVASE_EMBEDDED |
|
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6203 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6204 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6205 /////////////// Unit tests /////////////// |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6206 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6207 #ifndef PRODUCT |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6208 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6209 #define test_log(...) \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6210 do {\ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6211 if (VerboseInternalVMTests) { \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6212 tty->print_cr(__VA_ARGS__); \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6213 tty->flush(); \ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6214 }\ |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
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diff
changeset
|
6215 } while (false) |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6216 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6217 class TestReserveMemorySpecial : AllStatic { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6218 public: |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6219 static void small_page_write(void* addr, size_t size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6220 size_t page_size = os::vm_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6221 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6222 char* end = (char*)addr + size; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6223 for (char* p = (char*)addr; p < end; p += page_size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6224 *p = 1; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6225 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6226 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6227 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6228 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
|
6229 if (!UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6230 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6231 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6232 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6233 test_log("test_reserve_memory_special_huge_tlbfs_only(" SIZE_FORMAT ")", size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6234 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6235 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_only(size, NULL, false); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6236 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6237 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6238 small_page_write(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6239 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6240 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
changeset
|
6241 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6242 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6243 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6244 static void test_reserve_memory_special_huge_tlbfs_only() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6245 if (!UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6246 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6247 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6248 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6249 size_t lp = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6250 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6251 for (size_t size = lp; size <= lp * 10; size += lp) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6252 test_reserve_memory_special_huge_tlbfs_only(size); |
|
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 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6255 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6256 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
|
6257 if (!UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6258 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6259 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6260 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6261 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
|
6262 size, alignment); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6263 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6264 assert(size >= os::large_page_size(), "Incorrect input to test"); |
|
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 char* addr = os::Linux::reserve_memory_special_huge_tlbfs_mixed(size, alignment, NULL, false); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6267 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6268 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6269 small_page_write(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6270 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6271 os::Linux::release_memory_special_huge_tlbfs(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6272 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6273 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6274 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6275 static void test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(size_t size) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6276 size_t lp = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6277 size_t ag = os::vm_allocation_granularity(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6278 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6279 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6280 test_reserve_memory_special_huge_tlbfs_mixed(size, alignment); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6281 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6282 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6283 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6284 static void test_reserve_memory_special_huge_tlbfs_mixed() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6285 size_t lp = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6286 size_t ag = os::vm_allocation_granularity(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6287 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6288 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6289 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp + ag); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6290 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp + lp / 2); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6291 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6292 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 + ag); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6293 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 - ag); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6294 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 2 + lp / 2); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6295 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 10); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6296 test_reserve_memory_special_huge_tlbfs_mixed_all_alignments(lp * 10 + lp / 2); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6297 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6298 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6299 static void test_reserve_memory_special_huge_tlbfs() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6300 if (!UseHugeTLBFS) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6301 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6302 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6303 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6304 test_reserve_memory_special_huge_tlbfs_only(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6305 test_reserve_memory_special_huge_tlbfs_mixed(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6306 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6307 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6308 static void test_reserve_memory_special_shm(size_t size, size_t alignment) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6309 if (!UseSHM) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6310 return; |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6311 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6312 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6313 test_log("test_reserve_memory_special_shm(" SIZE_FORMAT ", " SIZE_FORMAT ")", size, alignment); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6314 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6315 char* addr = os::Linux::reserve_memory_special_shm(size, alignment, NULL, false); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6316 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6317 if (addr != NULL) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6318 assert(is_ptr_aligned(addr, alignment), "Check"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6319 assert(is_ptr_aligned(addr, os::large_page_size()), "Check"); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6320 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6321 small_page_write(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6322 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6323 os::Linux::release_memory_special_shm(addr, size); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6324 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6325 } |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6326 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6327 static void test_reserve_memory_special_shm() { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6328 size_t lp = os::large_page_size(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6329 size_t ag = os::vm_allocation_granularity(); |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6330 |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
11092
diff
changeset
|
6331 for (size_t size = ag; size < lp * 3; size += ag) { |
|
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
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diff
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6332 for (size_t alignment = ag; is_size_aligned(size, alignment); alignment *= 2) { |
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6333 test_reserve_memory_special_shm(size, alignment); |
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6334 } |
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6335 } |
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6336 } |
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6337 |
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6338 static void test() { |
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6339 test_reserve_memory_special_huge_tlbfs(); |
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6340 test_reserve_memory_special_shm(); |
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6341 } |
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6342 }; |
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6343 |
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6344 void TestReserveMemorySpecial_test() { |
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6345 TestReserveMemorySpecial::test(); |
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6346 } |
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6347 |
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6348 #endif |