Thu, 24 May 2018 17:06:56 +0800
Merge
aoqi@0 | 1 | /* |
minqi@7824 | 2 | * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 4 | * |
aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 7 | * published by the Free Software Foundation. |
aoqi@0 | 8 | * |
aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 13 | * accompanied this code). |
aoqi@0 | 14 | * |
aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 18 | * |
aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 21 | * questions. |
aoqi@0 | 22 | * |
aoqi@0 | 23 | */ |
aoqi@0 | 24 | |
aoqi@0 | 25 | // no precompiled headers |
aoqi@0 | 26 | #include "classfile/classLoader.hpp" |
aoqi@0 | 27 | #include "classfile/systemDictionary.hpp" |
aoqi@0 | 28 | #include "classfile/vmSymbols.hpp" |
aoqi@0 | 29 | #include "code/icBuffer.hpp" |
aoqi@0 | 30 | #include "code/vtableStubs.hpp" |
aoqi@0 | 31 | #include "compiler/compileBroker.hpp" |
aoqi@0 | 32 | #include "compiler/disassembler.hpp" |
aoqi@0 | 33 | #include "interpreter/interpreter.hpp" |
aoqi@0 | 34 | #include "jvm_bsd.h" |
aoqi@0 | 35 | #include "memory/allocation.inline.hpp" |
aoqi@0 | 36 | #include "memory/filemap.hpp" |
aoqi@0 | 37 | #include "mutex_bsd.inline.hpp" |
aoqi@0 | 38 | #include "oops/oop.inline.hpp" |
aoqi@0 | 39 | #include "os_share_bsd.hpp" |
aoqi@0 | 40 | #include "prims/jniFastGetField.hpp" |
aoqi@0 | 41 | #include "prims/jvm.h" |
aoqi@0 | 42 | #include "prims/jvm_misc.hpp" |
aoqi@0 | 43 | #include "runtime/arguments.hpp" |
aoqi@0 | 44 | #include "runtime/extendedPC.hpp" |
aoqi@0 | 45 | #include "runtime/globals.hpp" |
aoqi@0 | 46 | #include "runtime/interfaceSupport.hpp" |
aoqi@0 | 47 | #include "runtime/java.hpp" |
aoqi@0 | 48 | #include "runtime/javaCalls.hpp" |
aoqi@0 | 49 | #include "runtime/mutexLocker.hpp" |
aoqi@0 | 50 | #include "runtime/objectMonitor.hpp" |
goetz@6911 | 51 | #include "runtime/orderAccess.inline.hpp" |
aoqi@0 | 52 | #include "runtime/osThread.hpp" |
aoqi@0 | 53 | #include "runtime/perfMemory.hpp" |
aoqi@0 | 54 | #include "runtime/sharedRuntime.hpp" |
aoqi@0 | 55 | #include "runtime/statSampler.hpp" |
aoqi@0 | 56 | #include "runtime/stubRoutines.hpp" |
aoqi@0 | 57 | #include "runtime/thread.inline.hpp" |
aoqi@0 | 58 | #include "runtime/threadCritical.hpp" |
aoqi@0 | 59 | #include "runtime/timer.hpp" |
aoqi@0 | 60 | #include "services/attachListener.hpp" |
aoqi@0 | 61 | #include "services/memTracker.hpp" |
aoqi@0 | 62 | #include "services/runtimeService.hpp" |
aoqi@0 | 63 | #include "utilities/decoder.hpp" |
aoqi@0 | 64 | #include "utilities/defaultStream.hpp" |
aoqi@0 | 65 | #include "utilities/events.hpp" |
aoqi@0 | 66 | #include "utilities/growableArray.hpp" |
aoqi@0 | 67 | #include "utilities/vmError.hpp" |
aoqi@0 | 68 | |
aoqi@0 | 69 | // put OS-includes here |
aoqi@0 | 70 | # include <sys/types.h> |
aoqi@0 | 71 | # include <sys/mman.h> |
aoqi@0 | 72 | # include <sys/stat.h> |
aoqi@0 | 73 | # include <sys/select.h> |
aoqi@0 | 74 | # include <pthread.h> |
aoqi@0 | 75 | # include <signal.h> |
aoqi@0 | 76 | # include <errno.h> |
aoqi@0 | 77 | # include <dlfcn.h> |
aoqi@0 | 78 | # include <stdio.h> |
aoqi@0 | 79 | # include <unistd.h> |
aoqi@0 | 80 | # include <sys/resource.h> |
aoqi@0 | 81 | # include <pthread.h> |
aoqi@0 | 82 | # include <sys/stat.h> |
aoqi@0 | 83 | # include <sys/time.h> |
aoqi@0 | 84 | # include <sys/times.h> |
aoqi@0 | 85 | # include <sys/utsname.h> |
aoqi@0 | 86 | # include <sys/socket.h> |
aoqi@0 | 87 | # include <sys/wait.h> |
aoqi@0 | 88 | # include <time.h> |
aoqi@0 | 89 | # include <pwd.h> |
aoqi@0 | 90 | # include <poll.h> |
aoqi@0 | 91 | # include <semaphore.h> |
aoqi@0 | 92 | # include <fcntl.h> |
aoqi@0 | 93 | # include <string.h> |
aoqi@0 | 94 | # include <sys/param.h> |
aoqi@0 | 95 | # include <sys/sysctl.h> |
aoqi@0 | 96 | # include <sys/ipc.h> |
aoqi@0 | 97 | # include <sys/shm.h> |
aoqi@0 | 98 | #ifndef __APPLE__ |
aoqi@0 | 99 | # include <link.h> |
aoqi@0 | 100 | #endif |
aoqi@0 | 101 | # include <stdint.h> |
aoqi@0 | 102 | # include <inttypes.h> |
aoqi@0 | 103 | # include <sys/ioctl.h> |
aoqi@0 | 104 | # include <sys/syscall.h> |
aoqi@0 | 105 | |
aoqi@0 | 106 | #if defined(__FreeBSD__) || defined(__NetBSD__) |
aoqi@0 | 107 | # include <elf.h> |
aoqi@0 | 108 | #endif |
aoqi@0 | 109 | |
aoqi@0 | 110 | #ifdef __APPLE__ |
aoqi@0 | 111 | # include <mach/mach.h> // semaphore_* API |
aoqi@0 | 112 | # include <mach-o/dyld.h> |
aoqi@0 | 113 | # include <sys/proc_info.h> |
aoqi@0 | 114 | # include <objc/objc-auto.h> |
aoqi@0 | 115 | #endif |
aoqi@0 | 116 | |
aoqi@0 | 117 | #ifndef MAP_ANONYMOUS |
aoqi@0 | 118 | #define MAP_ANONYMOUS MAP_ANON |
aoqi@0 | 119 | #endif |
aoqi@0 | 120 | |
aoqi@0 | 121 | #define MAX_PATH (2 * K) |
aoqi@0 | 122 | |
aoqi@0 | 123 | // for timer info max values which include all bits |
aoqi@0 | 124 | #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) |
aoqi@0 | 125 | |
aoqi@0 | 126 | #define LARGEPAGES_BIT (1 << 6) |
aoqi@0 | 127 | |
aoqi@0 | 128 | PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
aoqi@0 | 129 | |
aoqi@0 | 130 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 131 | // global variables |
aoqi@0 | 132 | julong os::Bsd::_physical_memory = 0; |
aoqi@0 | 133 | |
aoqi@0 | 134 | #ifdef __APPLE__ |
aoqi@0 | 135 | mach_timebase_info_data_t os::Bsd::_timebase_info = {0, 0}; |
aoqi@0 | 136 | volatile uint64_t os::Bsd::_max_abstime = 0; |
aoqi@0 | 137 | #else |
aoqi@0 | 138 | int (*os::Bsd::_clock_gettime)(clockid_t, struct timespec *) = NULL; |
aoqi@0 | 139 | #endif |
aoqi@0 | 140 | pthread_t os::Bsd::_main_thread; |
aoqi@0 | 141 | int os::Bsd::_page_size = -1; |
aoqi@0 | 142 | |
aoqi@0 | 143 | static jlong initial_time_count=0; |
aoqi@0 | 144 | |
aoqi@0 | 145 | static int clock_tics_per_sec = 100; |
aoqi@0 | 146 | |
aoqi@0 | 147 | // For diagnostics to print a message once. see run_periodic_checks |
aoqi@0 | 148 | static sigset_t check_signal_done; |
aoqi@0 | 149 | static bool check_signals = true; |
aoqi@0 | 150 | |
aoqi@0 | 151 | static pid_t _initial_pid = 0; |
aoqi@0 | 152 | |
aoqi@0 | 153 | /* Signal number used to suspend/resume a thread */ |
aoqi@0 | 154 | |
aoqi@0 | 155 | /* do not use any signal number less than SIGSEGV, see 4355769 */ |
aoqi@0 | 156 | static int SR_signum = SIGUSR2; |
aoqi@0 | 157 | sigset_t SR_sigset; |
aoqi@0 | 158 | |
aoqi@0 | 159 | |
aoqi@0 | 160 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 161 | // utility functions |
aoqi@0 | 162 | |
aoqi@0 | 163 | static int SR_initialize(); |
aoqi@0 | 164 | static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); |
aoqi@0 | 165 | |
aoqi@0 | 166 | julong os::available_memory() { |
aoqi@0 | 167 | return Bsd::available_memory(); |
aoqi@0 | 168 | } |
aoqi@0 | 169 | |
aoqi@0 | 170 | // available here means free |
aoqi@0 | 171 | julong os::Bsd::available_memory() { |
aoqi@0 | 172 | uint64_t available = physical_memory() >> 2; |
aoqi@0 | 173 | #ifdef __APPLE__ |
aoqi@0 | 174 | mach_msg_type_number_t count = HOST_VM_INFO64_COUNT; |
aoqi@0 | 175 | vm_statistics64_data_t vmstat; |
aoqi@0 | 176 | kern_return_t kerr = host_statistics64(mach_host_self(), HOST_VM_INFO64, |
aoqi@0 | 177 | (host_info64_t)&vmstat, &count); |
aoqi@0 | 178 | assert(kerr == KERN_SUCCESS, |
aoqi@0 | 179 | "host_statistics64 failed - check mach_host_self() and count"); |
aoqi@0 | 180 | if (kerr == KERN_SUCCESS) { |
aoqi@0 | 181 | available = vmstat.free_count * os::vm_page_size(); |
aoqi@0 | 182 | } |
aoqi@0 | 183 | #endif |
aoqi@0 | 184 | return available; |
aoqi@0 | 185 | } |
aoqi@0 | 186 | |
aoqi@0 | 187 | julong os::physical_memory() { |
aoqi@0 | 188 | return Bsd::physical_memory(); |
aoqi@0 | 189 | } |
aoqi@0 | 190 | |
aoqi@0 | 191 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 192 | // environment support |
aoqi@0 | 193 | |
aoqi@0 | 194 | bool os::getenv(const char* name, char* buf, int len) { |
aoqi@0 | 195 | const char* val = ::getenv(name); |
aoqi@0 | 196 | if (val != NULL && strlen(val) < (size_t)len) { |
aoqi@0 | 197 | strcpy(buf, val); |
aoqi@0 | 198 | return true; |
aoqi@0 | 199 | } |
aoqi@0 | 200 | if (len > 0) buf[0] = 0; // return a null string |
aoqi@0 | 201 | return false; |
aoqi@0 | 202 | } |
aoqi@0 | 203 | |
aoqi@0 | 204 | |
aoqi@0 | 205 | // Return true if user is running as root. |
aoqi@0 | 206 | |
aoqi@0 | 207 | bool os::have_special_privileges() { |
aoqi@0 | 208 | static bool init = false; |
aoqi@0 | 209 | static bool privileges = false; |
aoqi@0 | 210 | if (!init) { |
aoqi@0 | 211 | privileges = (getuid() != geteuid()) || (getgid() != getegid()); |
aoqi@0 | 212 | init = true; |
aoqi@0 | 213 | } |
aoqi@0 | 214 | return privileges; |
aoqi@0 | 215 | } |
aoqi@0 | 216 | |
aoqi@0 | 217 | |
aoqi@0 | 218 | |
aoqi@0 | 219 | // Cpu architecture string |
aoqi@0 | 220 | #if defined(ZERO) |
aoqi@0 | 221 | static char cpu_arch[] = ZERO_LIBARCH; |
aoqi@0 | 222 | #elif defined(IA64) |
aoqi@0 | 223 | static char cpu_arch[] = "ia64"; |
aoqi@0 | 224 | #elif defined(IA32) |
aoqi@0 | 225 | static char cpu_arch[] = "i386"; |
aoqi@0 | 226 | #elif defined(AMD64) |
aoqi@0 | 227 | static char cpu_arch[] = "amd64"; |
aoqi@0 | 228 | #elif defined(ARM) |
aoqi@0 | 229 | static char cpu_arch[] = "arm"; |
aoqi@0 | 230 | #elif defined(PPC32) |
aoqi@0 | 231 | static char cpu_arch[] = "ppc"; |
aoqi@0 | 232 | #elif defined(SPARC) |
aoqi@0 | 233 | # ifdef _LP64 |
aoqi@0 | 234 | static char cpu_arch[] = "sparcv9"; |
aoqi@0 | 235 | # else |
aoqi@0 | 236 | static char cpu_arch[] = "sparc"; |
aoqi@0 | 237 | # endif |
aoqi@0 | 238 | #else |
aoqi@0 | 239 | #error Add appropriate cpu_arch setting |
aoqi@0 | 240 | #endif |
aoqi@0 | 241 | |
aoqi@0 | 242 | // Compiler variant |
aoqi@0 | 243 | #ifdef COMPILER2 |
aoqi@0 | 244 | #define COMPILER_VARIANT "server" |
aoqi@0 | 245 | #else |
aoqi@0 | 246 | #define COMPILER_VARIANT "client" |
aoqi@0 | 247 | #endif |
aoqi@0 | 248 | |
aoqi@0 | 249 | |
aoqi@0 | 250 | void os::Bsd::initialize_system_info() { |
aoqi@0 | 251 | int mib[2]; |
aoqi@0 | 252 | size_t len; |
aoqi@0 | 253 | int cpu_val; |
aoqi@0 | 254 | julong mem_val; |
aoqi@0 | 255 | |
aoqi@0 | 256 | /* get processors count via hw.ncpus sysctl */ |
aoqi@0 | 257 | mib[0] = CTL_HW; |
aoqi@0 | 258 | mib[1] = HW_NCPU; |
aoqi@0 | 259 | len = sizeof(cpu_val); |
aoqi@0 | 260 | if (sysctl(mib, 2, &cpu_val, &len, NULL, 0) != -1 && cpu_val >= 1) { |
aoqi@0 | 261 | assert(len == sizeof(cpu_val), "unexpected data size"); |
aoqi@0 | 262 | set_processor_count(cpu_val); |
aoqi@0 | 263 | } |
aoqi@0 | 264 | else { |
aoqi@0 | 265 | set_processor_count(1); // fallback |
aoqi@0 | 266 | } |
aoqi@0 | 267 | |
aoqi@0 | 268 | /* get physical memory via hw.memsize sysctl (hw.memsize is used |
aoqi@0 | 269 | * since it returns a 64 bit value) |
aoqi@0 | 270 | */ |
aoqi@0 | 271 | mib[0] = CTL_HW; |
aoqi@0 | 272 | |
aoqi@0 | 273 | #if defined (HW_MEMSIZE) // Apple |
aoqi@0 | 274 | mib[1] = HW_MEMSIZE; |
aoqi@0 | 275 | #elif defined(HW_PHYSMEM) // Most of BSD |
aoqi@0 | 276 | mib[1] = HW_PHYSMEM; |
aoqi@0 | 277 | #elif defined(HW_REALMEM) // Old FreeBSD |
aoqi@0 | 278 | mib[1] = HW_REALMEM; |
aoqi@0 | 279 | #else |
aoqi@0 | 280 | #error No ways to get physmem |
aoqi@0 | 281 | #endif |
aoqi@0 | 282 | |
aoqi@0 | 283 | len = sizeof(mem_val); |
aoqi@0 | 284 | if (sysctl(mib, 2, &mem_val, &len, NULL, 0) != -1) { |
aoqi@0 | 285 | assert(len == sizeof(mem_val), "unexpected data size"); |
aoqi@0 | 286 | _physical_memory = mem_val; |
aoqi@0 | 287 | } else { |
aoqi@0 | 288 | _physical_memory = 256*1024*1024; // fallback (XXXBSD?) |
aoqi@0 | 289 | } |
aoqi@0 | 290 | |
aoqi@0 | 291 | #ifdef __OpenBSD__ |
aoqi@0 | 292 | { |
aoqi@0 | 293 | // limit _physical_memory memory view on OpenBSD since |
aoqi@0 | 294 | // datasize rlimit restricts us anyway. |
aoqi@0 | 295 | struct rlimit limits; |
aoqi@0 | 296 | getrlimit(RLIMIT_DATA, &limits); |
aoqi@0 | 297 | _physical_memory = MIN2(_physical_memory, (julong)limits.rlim_cur); |
aoqi@0 | 298 | } |
aoqi@0 | 299 | #endif |
aoqi@0 | 300 | } |
aoqi@0 | 301 | |
aoqi@0 | 302 | #ifdef __APPLE__ |
aoqi@0 | 303 | static const char *get_home() { |
aoqi@0 | 304 | const char *home_dir = ::getenv("HOME"); |
aoqi@0 | 305 | if ((home_dir == NULL) || (*home_dir == '\0')) { |
aoqi@0 | 306 | struct passwd *passwd_info = getpwuid(geteuid()); |
aoqi@0 | 307 | if (passwd_info != NULL) { |
aoqi@0 | 308 | home_dir = passwd_info->pw_dir; |
aoqi@0 | 309 | } |
aoqi@0 | 310 | } |
aoqi@0 | 311 | |
aoqi@0 | 312 | return home_dir; |
aoqi@0 | 313 | } |
aoqi@0 | 314 | #endif |
aoqi@0 | 315 | |
aoqi@0 | 316 | void os::init_system_properties_values() { |
aoqi@0 | 317 | // The next steps are taken in the product version: |
aoqi@0 | 318 | // |
aoqi@0 | 319 | // Obtain the JAVA_HOME value from the location of libjvm.so. |
aoqi@0 | 320 | // This library should be located at: |
aoqi@0 | 321 | // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. |
aoqi@0 | 322 | // |
aoqi@0 | 323 | // If "/jre/lib/" appears at the right place in the path, then we |
aoqi@0 | 324 | // assume libjvm.so is installed in a JDK and we use this path. |
aoqi@0 | 325 | // |
aoqi@0 | 326 | // Otherwise exit with message: "Could not create the Java virtual machine." |
aoqi@0 | 327 | // |
aoqi@0 | 328 | // The following extra steps are taken in the debugging version: |
aoqi@0 | 329 | // |
aoqi@0 | 330 | // If "/jre/lib/" does NOT appear at the right place in the path |
aoqi@0 | 331 | // instead of exit check for $JAVA_HOME environment variable. |
aoqi@0 | 332 | // |
aoqi@0 | 333 | // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, |
aoqi@0 | 334 | // then we append a fake suffix "hotspot/libjvm.so" to this path so |
aoqi@0 | 335 | // it looks like libjvm.so is installed there |
aoqi@0 | 336 | // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. |
aoqi@0 | 337 | // |
aoqi@0 | 338 | // Otherwise exit. |
aoqi@0 | 339 | // |
aoqi@0 | 340 | // Important note: if the location of libjvm.so changes this |
aoqi@0 | 341 | // code needs to be changed accordingly. |
aoqi@0 | 342 | |
aoqi@0 | 343 | // See ld(1): |
aoqi@0 | 344 | // The linker uses the following search paths to locate required |
aoqi@0 | 345 | // shared libraries: |
aoqi@0 | 346 | // 1: ... |
aoqi@0 | 347 | // ... |
aoqi@0 | 348 | // 7: The default directories, normally /lib and /usr/lib. |
aoqi@0 | 349 | #ifndef DEFAULT_LIBPATH |
aoqi@0 | 350 | #define DEFAULT_LIBPATH "/lib:/usr/lib" |
aoqi@0 | 351 | #endif |
aoqi@0 | 352 | |
aoqi@0 | 353 | // Base path of extensions installed on the system. |
aoqi@0 | 354 | #define SYS_EXT_DIR "/usr/java/packages" |
aoqi@0 | 355 | #define EXTENSIONS_DIR "/lib/ext" |
aoqi@0 | 356 | #define ENDORSED_DIR "/lib/endorsed" |
aoqi@0 | 357 | |
aoqi@0 | 358 | #ifndef __APPLE__ |
aoqi@0 | 359 | |
aoqi@0 | 360 | // Buffer that fits several sprintfs. |
aoqi@0 | 361 | // Note that the space for the colon and the trailing null are provided |
aoqi@0 | 362 | // by the nulls included by the sizeof operator. |
aoqi@0 | 363 | const size_t bufsize = |
aoqi@0 | 364 | MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. |
aoqi@0 | 365 | (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir |
aoqi@0 | 366 | (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir |
aoqi@0 | 367 | char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
aoqi@0 | 368 | |
aoqi@0 | 369 | // sysclasspath, java_home, dll_dir |
aoqi@0 | 370 | { |
aoqi@0 | 371 | char *pslash; |
aoqi@0 | 372 | os::jvm_path(buf, bufsize); |
aoqi@0 | 373 | |
aoqi@0 | 374 | // Found the full path to libjvm.so. |
aoqi@0 | 375 | // Now cut the path to <java_home>/jre if we can. |
aoqi@0 | 376 | *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
aoqi@0 | 377 | pslash = strrchr(buf, '/'); |
aoqi@0 | 378 | if (pslash != NULL) { |
aoqi@0 | 379 | *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
aoqi@0 | 380 | } |
aoqi@0 | 381 | Arguments::set_dll_dir(buf); |
aoqi@0 | 382 | |
aoqi@0 | 383 | if (pslash != NULL) { |
aoqi@0 | 384 | pslash = strrchr(buf, '/'); |
aoqi@0 | 385 | if (pslash != NULL) { |
aoqi@0 | 386 | *pslash = '\0'; // Get rid of /<arch>. |
aoqi@0 | 387 | pslash = strrchr(buf, '/'); |
aoqi@0 | 388 | if (pslash != NULL) { |
aoqi@0 | 389 | *pslash = '\0'; // Get rid of /lib. |
aoqi@0 | 390 | } |
aoqi@0 | 391 | } |
aoqi@0 | 392 | } |
aoqi@0 | 393 | Arguments::set_java_home(buf); |
aoqi@0 | 394 | set_boot_path('/', ':'); |
aoqi@0 | 395 | } |
aoqi@0 | 396 | |
aoqi@0 | 397 | // Where to look for native libraries. |
aoqi@0 | 398 | // |
aoqi@0 | 399 | // Note: Due to a legacy implementation, most of the library path |
aoqi@0 | 400 | // is set in the launcher. This was to accomodate linking restrictions |
aoqi@0 | 401 | // on legacy Bsd implementations (which are no longer supported). |
aoqi@0 | 402 | // Eventually, all the library path setting will be done here. |
aoqi@0 | 403 | // |
aoqi@0 | 404 | // However, to prevent the proliferation of improperly built native |
aoqi@0 | 405 | // libraries, the new path component /usr/java/packages is added here. |
aoqi@0 | 406 | // Eventually, all the library path setting will be done here. |
aoqi@0 | 407 | { |
aoqi@0 | 408 | // Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
aoqi@0 | 409 | // should always exist (until the legacy problem cited above is |
aoqi@0 | 410 | // addressed). |
aoqi@0 | 411 | const char *v = ::getenv("LD_LIBRARY_PATH"); |
aoqi@0 | 412 | const char *v_colon = ":"; |
aoqi@0 | 413 | if (v == NULL) { v = ""; v_colon = ""; } |
aoqi@0 | 414 | // That's +1 for the colon and +1 for the trailing '\0'. |
aoqi@0 | 415 | char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, |
aoqi@0 | 416 | strlen(v) + 1 + |
aoqi@0 | 417 | sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch) + sizeof(DEFAULT_LIBPATH) + 1, |
aoqi@0 | 418 | mtInternal); |
aoqi@0 | 419 | sprintf(ld_library_path, "%s%s" SYS_EXT_DIR "/lib/%s:" DEFAULT_LIBPATH, v, v_colon, cpu_arch); |
aoqi@0 | 420 | Arguments::set_library_path(ld_library_path); |
aoqi@0 | 421 | FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); |
aoqi@0 | 422 | } |
aoqi@0 | 423 | |
aoqi@0 | 424 | // Extensions directories. |
aoqi@0 | 425 | sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); |
aoqi@0 | 426 | Arguments::set_ext_dirs(buf); |
aoqi@0 | 427 | |
aoqi@0 | 428 | // Endorsed standards default directory. |
aoqi@0 | 429 | sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
aoqi@0 | 430 | Arguments::set_endorsed_dirs(buf); |
aoqi@0 | 431 | |
aoqi@0 | 432 | FREE_C_HEAP_ARRAY(char, buf, mtInternal); |
aoqi@0 | 433 | |
aoqi@0 | 434 | #else // __APPLE__ |
aoqi@0 | 435 | |
aoqi@0 | 436 | #define SYS_EXTENSIONS_DIR "/Library/Java/Extensions" |
aoqi@0 | 437 | #define SYS_EXTENSIONS_DIRS SYS_EXTENSIONS_DIR ":/Network" SYS_EXTENSIONS_DIR ":/System" SYS_EXTENSIONS_DIR ":/usr/lib/java" |
aoqi@0 | 438 | |
aoqi@0 | 439 | const char *user_home_dir = get_home(); |
aoqi@0 | 440 | // The null in SYS_EXTENSIONS_DIRS counts for the size of the colon after user_home_dir. |
aoqi@0 | 441 | size_t system_ext_size = strlen(user_home_dir) + sizeof(SYS_EXTENSIONS_DIR) + |
aoqi@0 | 442 | sizeof(SYS_EXTENSIONS_DIRS); |
aoqi@0 | 443 | |
aoqi@0 | 444 | // Buffer that fits several sprintfs. |
aoqi@0 | 445 | // Note that the space for the colon and the trailing null are provided |
aoqi@0 | 446 | // by the nulls included by the sizeof operator. |
aoqi@0 | 447 | const size_t bufsize = |
aoqi@0 | 448 | MAX3((size_t)MAXPATHLEN, // for dll_dir & friends. |
aoqi@0 | 449 | (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + system_ext_size, // extensions dir |
aoqi@0 | 450 | (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir |
aoqi@0 | 451 | char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); |
aoqi@0 | 452 | |
aoqi@0 | 453 | // sysclasspath, java_home, dll_dir |
aoqi@0 | 454 | { |
aoqi@0 | 455 | char *pslash; |
aoqi@0 | 456 | os::jvm_path(buf, bufsize); |
aoqi@0 | 457 | |
aoqi@0 | 458 | // Found the full path to libjvm.so. |
aoqi@0 | 459 | // Now cut the path to <java_home>/jre if we can. |
aoqi@0 | 460 | *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. |
aoqi@0 | 461 | pslash = strrchr(buf, '/'); |
aoqi@0 | 462 | if (pslash != NULL) { |
aoqi@0 | 463 | *pslash = '\0'; // Get rid of /{client|server|hotspot}. |
aoqi@0 | 464 | } |
aoqi@0 | 465 | Arguments::set_dll_dir(buf); |
aoqi@0 | 466 | |
aoqi@0 | 467 | if (pslash != NULL) { |
aoqi@0 | 468 | pslash = strrchr(buf, '/'); |
aoqi@0 | 469 | if (pslash != NULL) { |
aoqi@0 | 470 | *pslash = '\0'; // Get rid of /lib. |
aoqi@0 | 471 | } |
aoqi@0 | 472 | } |
aoqi@0 | 473 | Arguments::set_java_home(buf); |
aoqi@0 | 474 | set_boot_path('/', ':'); |
aoqi@0 | 475 | } |
aoqi@0 | 476 | |
aoqi@0 | 477 | // Where to look for native libraries. |
aoqi@0 | 478 | // |
aoqi@0 | 479 | // Note: Due to a legacy implementation, most of the library path |
aoqi@0 | 480 | // is set in the launcher. This was to accomodate linking restrictions |
aoqi@0 | 481 | // on legacy Bsd implementations (which are no longer supported). |
aoqi@0 | 482 | // Eventually, all the library path setting will be done here. |
aoqi@0 | 483 | // |
aoqi@0 | 484 | // However, to prevent the proliferation of improperly built native |
aoqi@0 | 485 | // libraries, the new path component /usr/java/packages is added here. |
aoqi@0 | 486 | // Eventually, all the library path setting will be done here. |
aoqi@0 | 487 | { |
aoqi@0 | 488 | // Get the user setting of LD_LIBRARY_PATH, and prepended it. It |
aoqi@0 | 489 | // should always exist (until the legacy problem cited above is |
aoqi@0 | 490 | // addressed). |
aoqi@0 | 491 | // Prepend the default path with the JAVA_LIBRARY_PATH so that the app launcher code |
aoqi@0 | 492 | // can specify a directory inside an app wrapper |
aoqi@0 | 493 | const char *l = ::getenv("JAVA_LIBRARY_PATH"); |
aoqi@0 | 494 | const char *l_colon = ":"; |
aoqi@0 | 495 | if (l == NULL) { l = ""; l_colon = ""; } |
aoqi@0 | 496 | |
aoqi@0 | 497 | const char *v = ::getenv("DYLD_LIBRARY_PATH"); |
aoqi@0 | 498 | const char *v_colon = ":"; |
aoqi@0 | 499 | if (v == NULL) { v = ""; v_colon = ""; } |
aoqi@0 | 500 | |
aoqi@0 | 501 | // Apple's Java6 has "." at the beginning of java.library.path. |
aoqi@0 | 502 | // OpenJDK on Windows has "." at the end of java.library.path. |
aoqi@0 | 503 | // OpenJDK on Linux and Solaris don't have "." in java.library.path |
aoqi@0 | 504 | // at all. To ease the transition from Apple's Java6 to OpenJDK7, |
aoqi@0 | 505 | // "." is appended to the end of java.library.path. Yes, this |
aoqi@0 | 506 | // could cause a change in behavior, but Apple's Java6 behavior |
aoqi@0 | 507 | // can be achieved by putting "." at the beginning of the |
aoqi@0 | 508 | // JAVA_LIBRARY_PATH environment variable. |
aoqi@0 | 509 | char *ld_library_path = (char *)NEW_C_HEAP_ARRAY(char, |
aoqi@0 | 510 | strlen(v) + 1 + strlen(l) + 1 + |
aoqi@0 | 511 | system_ext_size + 3, |
aoqi@0 | 512 | mtInternal); |
aoqi@0 | 513 | sprintf(ld_library_path, "%s%s%s%s%s" SYS_EXTENSIONS_DIR ":" SYS_EXTENSIONS_DIRS ":.", |
aoqi@0 | 514 | v, v_colon, l, l_colon, user_home_dir); |
aoqi@0 | 515 | Arguments::set_library_path(ld_library_path); |
aoqi@0 | 516 | FREE_C_HEAP_ARRAY(char, ld_library_path, mtInternal); |
aoqi@0 | 517 | } |
aoqi@0 | 518 | |
aoqi@0 | 519 | // Extensions directories. |
aoqi@0 | 520 | // |
aoqi@0 | 521 | // Note that the space for the colon and the trailing null are provided |
aoqi@0 | 522 | // by the nulls included by the sizeof operator (so actually one byte more |
aoqi@0 | 523 | // than necessary is allocated). |
aoqi@0 | 524 | sprintf(buf, "%s" SYS_EXTENSIONS_DIR ":%s" EXTENSIONS_DIR ":" SYS_EXTENSIONS_DIRS, |
aoqi@0 | 525 | user_home_dir, Arguments::get_java_home()); |
aoqi@0 | 526 | Arguments::set_ext_dirs(buf); |
aoqi@0 | 527 | |
aoqi@0 | 528 | // Endorsed standards default directory. |
aoqi@0 | 529 | sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); |
aoqi@0 | 530 | Arguments::set_endorsed_dirs(buf); |
aoqi@0 | 531 | |
aoqi@0 | 532 | FREE_C_HEAP_ARRAY(char, buf, mtInternal); |
aoqi@0 | 533 | |
aoqi@0 | 534 | #undef SYS_EXTENSIONS_DIR |
aoqi@0 | 535 | #undef SYS_EXTENSIONS_DIRS |
aoqi@0 | 536 | |
aoqi@0 | 537 | #endif // __APPLE__ |
aoqi@0 | 538 | |
aoqi@0 | 539 | #undef SYS_EXT_DIR |
aoqi@0 | 540 | #undef EXTENSIONS_DIR |
aoqi@0 | 541 | #undef ENDORSED_DIR |
aoqi@0 | 542 | } |
aoqi@0 | 543 | |
aoqi@0 | 544 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 545 | // breakpoint support |
aoqi@0 | 546 | |
aoqi@0 | 547 | void os::breakpoint() { |
aoqi@0 | 548 | BREAKPOINT; |
aoqi@0 | 549 | } |
aoqi@0 | 550 | |
aoqi@0 | 551 | extern "C" void breakpoint() { |
aoqi@0 | 552 | // use debugger to set breakpoint here |
aoqi@0 | 553 | } |
aoqi@0 | 554 | |
aoqi@0 | 555 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 556 | // signal support |
aoqi@0 | 557 | |
aoqi@0 | 558 | debug_only(static bool signal_sets_initialized = false); |
aoqi@0 | 559 | static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; |
aoqi@0 | 560 | |
aoqi@0 | 561 | bool os::Bsd::is_sig_ignored(int sig) { |
aoqi@0 | 562 | struct sigaction oact; |
aoqi@0 | 563 | sigaction(sig, (struct sigaction*)NULL, &oact); |
aoqi@0 | 564 | void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) |
aoqi@0 | 565 | : CAST_FROM_FN_PTR(void*, oact.sa_handler); |
aoqi@0 | 566 | if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) |
aoqi@0 | 567 | return true; |
aoqi@0 | 568 | else |
aoqi@0 | 569 | return false; |
aoqi@0 | 570 | } |
aoqi@0 | 571 | |
aoqi@0 | 572 | void os::Bsd::signal_sets_init() { |
aoqi@0 | 573 | // Should also have an assertion stating we are still single-threaded. |
aoqi@0 | 574 | assert(!signal_sets_initialized, "Already initialized"); |
aoqi@0 | 575 | // Fill in signals that are necessarily unblocked for all threads in |
aoqi@0 | 576 | // the VM. Currently, we unblock the following signals: |
aoqi@0 | 577 | // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden |
aoqi@0 | 578 | // by -Xrs (=ReduceSignalUsage)); |
aoqi@0 | 579 | // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all |
aoqi@0 | 580 | // other threads. The "ReduceSignalUsage" boolean tells us not to alter |
aoqi@0 | 581 | // the dispositions or masks wrt these signals. |
aoqi@0 | 582 | // Programs embedding the VM that want to use the above signals for their |
aoqi@0 | 583 | // own purposes must, at this time, use the "-Xrs" option to prevent |
aoqi@0 | 584 | // interference with shutdown hooks and BREAK_SIGNAL thread dumping. |
aoqi@0 | 585 | // (See bug 4345157, and other related bugs). |
aoqi@0 | 586 | // In reality, though, unblocking these signals is really a nop, since |
aoqi@0 | 587 | // these signals are not blocked by default. |
aoqi@0 | 588 | sigemptyset(&unblocked_sigs); |
aoqi@0 | 589 | sigemptyset(&allowdebug_blocked_sigs); |
aoqi@0 | 590 | sigaddset(&unblocked_sigs, SIGILL); |
aoqi@0 | 591 | sigaddset(&unblocked_sigs, SIGSEGV); |
aoqi@0 | 592 | sigaddset(&unblocked_sigs, SIGBUS); |
aoqi@0 | 593 | sigaddset(&unblocked_sigs, SIGFPE); |
aoqi@0 | 594 | sigaddset(&unblocked_sigs, SR_signum); |
aoqi@0 | 595 | |
aoqi@0 | 596 | if (!ReduceSignalUsage) { |
aoqi@0 | 597 | if (!os::Bsd::is_sig_ignored(SHUTDOWN1_SIGNAL)) { |
aoqi@0 | 598 | sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); |
aoqi@0 | 599 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); |
aoqi@0 | 600 | } |
aoqi@0 | 601 | if (!os::Bsd::is_sig_ignored(SHUTDOWN2_SIGNAL)) { |
aoqi@0 | 602 | sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); |
aoqi@0 | 603 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); |
aoqi@0 | 604 | } |
aoqi@0 | 605 | if (!os::Bsd::is_sig_ignored(SHUTDOWN3_SIGNAL)) { |
aoqi@0 | 606 | sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); |
aoqi@0 | 607 | sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); |
aoqi@0 | 608 | } |
aoqi@0 | 609 | } |
aoqi@0 | 610 | // Fill in signals that are blocked by all but the VM thread. |
aoqi@0 | 611 | sigemptyset(&vm_sigs); |
aoqi@0 | 612 | if (!ReduceSignalUsage) |
aoqi@0 | 613 | sigaddset(&vm_sigs, BREAK_SIGNAL); |
aoqi@0 | 614 | debug_only(signal_sets_initialized = true); |
aoqi@0 | 615 | |
aoqi@0 | 616 | } |
aoqi@0 | 617 | |
aoqi@0 | 618 | // These are signals that are unblocked while a thread is running Java. |
aoqi@0 | 619 | // (For some reason, they get blocked by default.) |
aoqi@0 | 620 | sigset_t* os::Bsd::unblocked_signals() { |
aoqi@0 | 621 | assert(signal_sets_initialized, "Not initialized"); |
aoqi@0 | 622 | return &unblocked_sigs; |
aoqi@0 | 623 | } |
aoqi@0 | 624 | |
aoqi@0 | 625 | // These are the signals that are blocked while a (non-VM) thread is |
aoqi@0 | 626 | // running Java. Only the VM thread handles these signals. |
aoqi@0 | 627 | sigset_t* os::Bsd::vm_signals() { |
aoqi@0 | 628 | assert(signal_sets_initialized, "Not initialized"); |
aoqi@0 | 629 | return &vm_sigs; |
aoqi@0 | 630 | } |
aoqi@0 | 631 | |
aoqi@0 | 632 | // These are signals that are blocked during cond_wait to allow debugger in |
aoqi@0 | 633 | sigset_t* os::Bsd::allowdebug_blocked_signals() { |
aoqi@0 | 634 | assert(signal_sets_initialized, "Not initialized"); |
aoqi@0 | 635 | return &allowdebug_blocked_sigs; |
aoqi@0 | 636 | } |
aoqi@0 | 637 | |
aoqi@0 | 638 | void os::Bsd::hotspot_sigmask(Thread* thread) { |
aoqi@0 | 639 | |
aoqi@0 | 640 | //Save caller's signal mask before setting VM signal mask |
aoqi@0 | 641 | sigset_t caller_sigmask; |
aoqi@0 | 642 | pthread_sigmask(SIG_BLOCK, NULL, &caller_sigmask); |
aoqi@0 | 643 | |
aoqi@0 | 644 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 645 | osthread->set_caller_sigmask(caller_sigmask); |
aoqi@0 | 646 | |
aoqi@0 | 647 | pthread_sigmask(SIG_UNBLOCK, os::Bsd::unblocked_signals(), NULL); |
aoqi@0 | 648 | |
aoqi@0 | 649 | if (!ReduceSignalUsage) { |
aoqi@0 | 650 | if (thread->is_VM_thread()) { |
aoqi@0 | 651 | // Only the VM thread handles BREAK_SIGNAL ... |
aoqi@0 | 652 | pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); |
aoqi@0 | 653 | } else { |
aoqi@0 | 654 | // ... all other threads block BREAK_SIGNAL |
aoqi@0 | 655 | pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); |
aoqi@0 | 656 | } |
aoqi@0 | 657 | } |
aoqi@0 | 658 | } |
aoqi@0 | 659 | |
aoqi@0 | 660 | |
aoqi@0 | 661 | ////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 662 | // create new thread |
aoqi@0 | 663 | |
aoqi@0 | 664 | // check if it's safe to start a new thread |
aoqi@0 | 665 | static bool _thread_safety_check(Thread* thread) { |
aoqi@0 | 666 | return true; |
aoqi@0 | 667 | } |
aoqi@0 | 668 | |
aoqi@0 | 669 | #ifdef __APPLE__ |
aoqi@0 | 670 | // library handle for calling objc_registerThreadWithCollector() |
aoqi@0 | 671 | // without static linking to the libobjc library |
aoqi@0 | 672 | #define OBJC_LIB "/usr/lib/libobjc.dylib" |
aoqi@0 | 673 | #define OBJC_GCREGISTER "objc_registerThreadWithCollector" |
aoqi@0 | 674 | typedef void (*objc_registerThreadWithCollector_t)(); |
aoqi@0 | 675 | extern "C" objc_registerThreadWithCollector_t objc_registerThreadWithCollectorFunction; |
aoqi@0 | 676 | objc_registerThreadWithCollector_t objc_registerThreadWithCollectorFunction = NULL; |
aoqi@0 | 677 | #endif |
aoqi@0 | 678 | |
aoqi@0 | 679 | #ifdef __APPLE__ |
aoqi@0 | 680 | static uint64_t locate_unique_thread_id(mach_port_t mach_thread_port) { |
aoqi@0 | 681 | // Additional thread_id used to correlate threads in SA |
aoqi@0 | 682 | thread_identifier_info_data_t m_ident_info; |
aoqi@0 | 683 | mach_msg_type_number_t count = THREAD_IDENTIFIER_INFO_COUNT; |
aoqi@0 | 684 | |
aoqi@0 | 685 | thread_info(mach_thread_port, THREAD_IDENTIFIER_INFO, |
aoqi@0 | 686 | (thread_info_t) &m_ident_info, &count); |
aoqi@0 | 687 | |
aoqi@0 | 688 | return m_ident_info.thread_id; |
aoqi@0 | 689 | } |
aoqi@0 | 690 | #endif |
aoqi@0 | 691 | |
aoqi@0 | 692 | // Thread start routine for all newly created threads |
aoqi@0 | 693 | static void *java_start(Thread *thread) { |
aoqi@0 | 694 | // Try to randomize the cache line index of hot stack frames. |
aoqi@0 | 695 | // This helps when threads of the same stack traces evict each other's |
aoqi@0 | 696 | // cache lines. The threads can be either from the same JVM instance, or |
aoqi@0 | 697 | // from different JVM instances. The benefit is especially true for |
aoqi@0 | 698 | // processors with hyperthreading technology. |
aoqi@0 | 699 | static int counter = 0; |
aoqi@0 | 700 | int pid = os::current_process_id(); |
aoqi@0 | 701 | alloca(((pid ^ counter++) & 7) * 128); |
aoqi@0 | 702 | |
aoqi@0 | 703 | ThreadLocalStorage::set_thread(thread); |
aoqi@0 | 704 | |
aoqi@0 | 705 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 706 | Monitor* sync = osthread->startThread_lock(); |
aoqi@0 | 707 | |
aoqi@0 | 708 | // non floating stack BsdThreads needs extra check, see above |
aoqi@0 | 709 | if (!_thread_safety_check(thread)) { |
aoqi@0 | 710 | // notify parent thread |
aoqi@0 | 711 | MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); |
aoqi@0 | 712 | osthread->set_state(ZOMBIE); |
aoqi@0 | 713 | sync->notify_all(); |
aoqi@0 | 714 | return NULL; |
aoqi@0 | 715 | } |
aoqi@0 | 716 | |
aoqi@0 | 717 | osthread->set_thread_id(os::Bsd::gettid()); |
aoqi@0 | 718 | |
aoqi@0 | 719 | #ifdef __APPLE__ |
aoqi@0 | 720 | uint64_t unique_thread_id = locate_unique_thread_id(osthread->thread_id()); |
aoqi@0 | 721 | guarantee(unique_thread_id != 0, "unique thread id was not found"); |
aoqi@0 | 722 | osthread->set_unique_thread_id(unique_thread_id); |
aoqi@0 | 723 | #endif |
aoqi@0 | 724 | // initialize signal mask for this thread |
aoqi@0 | 725 | os::Bsd::hotspot_sigmask(thread); |
aoqi@0 | 726 | |
aoqi@0 | 727 | // initialize floating point control register |
aoqi@0 | 728 | os::Bsd::init_thread_fpu_state(); |
aoqi@0 | 729 | |
aoqi@0 | 730 | #ifdef __APPLE__ |
aoqi@0 | 731 | // register thread with objc gc |
aoqi@0 | 732 | if (objc_registerThreadWithCollectorFunction != NULL) { |
aoqi@0 | 733 | objc_registerThreadWithCollectorFunction(); |
aoqi@0 | 734 | } |
aoqi@0 | 735 | #endif |
aoqi@0 | 736 | |
aoqi@0 | 737 | // handshaking with parent thread |
aoqi@0 | 738 | { |
aoqi@0 | 739 | MutexLockerEx ml(sync, Mutex::_no_safepoint_check_flag); |
aoqi@0 | 740 | |
aoqi@0 | 741 | // notify parent thread |
aoqi@0 | 742 | osthread->set_state(INITIALIZED); |
aoqi@0 | 743 | sync->notify_all(); |
aoqi@0 | 744 | |
aoqi@0 | 745 | // wait until os::start_thread() |
aoqi@0 | 746 | while (osthread->get_state() == INITIALIZED) { |
aoqi@0 | 747 | sync->wait(Mutex::_no_safepoint_check_flag); |
aoqi@0 | 748 | } |
aoqi@0 | 749 | } |
aoqi@0 | 750 | |
aoqi@0 | 751 | // call one more level start routine |
aoqi@0 | 752 | thread->run(); |
aoqi@0 | 753 | |
aoqi@0 | 754 | return 0; |
aoqi@0 | 755 | } |
aoqi@0 | 756 | |
aoqi@0 | 757 | bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { |
aoqi@0 | 758 | assert(thread->osthread() == NULL, "caller responsible"); |
aoqi@0 | 759 | |
aoqi@0 | 760 | // Allocate the OSThread object |
aoqi@0 | 761 | OSThread* osthread = new OSThread(NULL, NULL); |
aoqi@0 | 762 | if (osthread == NULL) { |
aoqi@0 | 763 | return false; |
aoqi@0 | 764 | } |
aoqi@0 | 765 | |
aoqi@0 | 766 | // set the correct thread state |
aoqi@0 | 767 | osthread->set_thread_type(thr_type); |
aoqi@0 | 768 | |
aoqi@0 | 769 | // Initial state is ALLOCATED but not INITIALIZED |
aoqi@0 | 770 | osthread->set_state(ALLOCATED); |
aoqi@0 | 771 | |
aoqi@0 | 772 | thread->set_osthread(osthread); |
aoqi@0 | 773 | |
aoqi@0 | 774 | // init thread attributes |
aoqi@0 | 775 | pthread_attr_t attr; |
aoqi@0 | 776 | pthread_attr_init(&attr); |
aoqi@0 | 777 | pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); |
aoqi@0 | 778 | |
aoqi@0 | 779 | // stack size |
aoqi@0 | 780 | if (os::Bsd::supports_variable_stack_size()) { |
aoqi@0 | 781 | // calculate stack size if it's not specified by caller |
aoqi@0 | 782 | if (stack_size == 0) { |
aoqi@0 | 783 | stack_size = os::Bsd::default_stack_size(thr_type); |
aoqi@0 | 784 | |
aoqi@0 | 785 | switch (thr_type) { |
aoqi@0 | 786 | case os::java_thread: |
aoqi@0 | 787 | // Java threads use ThreadStackSize which default value can be |
aoqi@0 | 788 | // changed with the flag -Xss |
aoqi@0 | 789 | assert (JavaThread::stack_size_at_create() > 0, "this should be set"); |
aoqi@0 | 790 | stack_size = JavaThread::stack_size_at_create(); |
aoqi@0 | 791 | break; |
aoqi@0 | 792 | case os::compiler_thread: |
aoqi@0 | 793 | if (CompilerThreadStackSize > 0) { |
aoqi@0 | 794 | stack_size = (size_t)(CompilerThreadStackSize * K); |
aoqi@0 | 795 | break; |
aoqi@0 | 796 | } // else fall through: |
aoqi@0 | 797 | // use VMThreadStackSize if CompilerThreadStackSize is not defined |
aoqi@0 | 798 | case os::vm_thread: |
aoqi@0 | 799 | case os::pgc_thread: |
aoqi@0 | 800 | case os::cgc_thread: |
aoqi@0 | 801 | case os::watcher_thread: |
aoqi@0 | 802 | if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); |
aoqi@0 | 803 | break; |
aoqi@0 | 804 | } |
aoqi@0 | 805 | } |
aoqi@0 | 806 | |
aoqi@0 | 807 | stack_size = MAX2(stack_size, os::Bsd::min_stack_allowed); |
aoqi@0 | 808 | pthread_attr_setstacksize(&attr, stack_size); |
aoqi@0 | 809 | } else { |
aoqi@0 | 810 | // let pthread_create() pick the default value. |
aoqi@0 | 811 | } |
aoqi@0 | 812 | |
aoqi@0 | 813 | ThreadState state; |
aoqi@0 | 814 | |
aoqi@0 | 815 | { |
aoqi@0 | 816 | pthread_t tid; |
aoqi@0 | 817 | int ret = pthread_create(&tid, &attr, (void* (*)(void*)) java_start, thread); |
aoqi@0 | 818 | |
aoqi@0 | 819 | pthread_attr_destroy(&attr); |
aoqi@0 | 820 | |
aoqi@0 | 821 | if (ret != 0) { |
aoqi@0 | 822 | if (PrintMiscellaneous && (Verbose || WizardMode)) { |
aoqi@0 | 823 | perror("pthread_create()"); |
aoqi@0 | 824 | } |
aoqi@0 | 825 | // Need to clean up stuff we've allocated so far |
aoqi@0 | 826 | thread->set_osthread(NULL); |
aoqi@0 | 827 | delete osthread; |
aoqi@0 | 828 | return false; |
aoqi@0 | 829 | } |
aoqi@0 | 830 | |
aoqi@0 | 831 | // Store pthread info into the OSThread |
aoqi@0 | 832 | osthread->set_pthread_id(tid); |
aoqi@0 | 833 | |
aoqi@0 | 834 | // Wait until child thread is either initialized or aborted |
aoqi@0 | 835 | { |
aoqi@0 | 836 | Monitor* sync_with_child = osthread->startThread_lock(); |
aoqi@0 | 837 | MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); |
aoqi@0 | 838 | while ((state = osthread->get_state()) == ALLOCATED) { |
aoqi@0 | 839 | sync_with_child->wait(Mutex::_no_safepoint_check_flag); |
aoqi@0 | 840 | } |
aoqi@0 | 841 | } |
aoqi@0 | 842 | |
aoqi@0 | 843 | } |
aoqi@0 | 844 | |
aoqi@0 | 845 | // Aborted due to thread limit being reached |
aoqi@0 | 846 | if (state == ZOMBIE) { |
aoqi@0 | 847 | thread->set_osthread(NULL); |
aoqi@0 | 848 | delete osthread; |
aoqi@0 | 849 | return false; |
aoqi@0 | 850 | } |
aoqi@0 | 851 | |
aoqi@0 | 852 | // The thread is returned suspended (in state INITIALIZED), |
aoqi@0 | 853 | // and is started higher up in the call chain |
aoqi@0 | 854 | assert(state == INITIALIZED, "race condition"); |
aoqi@0 | 855 | return true; |
aoqi@0 | 856 | } |
aoqi@0 | 857 | |
aoqi@0 | 858 | ///////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 859 | // attach existing thread |
aoqi@0 | 860 | |
aoqi@0 | 861 | // bootstrap the main thread |
aoqi@0 | 862 | bool os::create_main_thread(JavaThread* thread) { |
aoqi@0 | 863 | assert(os::Bsd::_main_thread == pthread_self(), "should be called inside main thread"); |
aoqi@0 | 864 | return create_attached_thread(thread); |
aoqi@0 | 865 | } |
aoqi@0 | 866 | |
aoqi@0 | 867 | bool os::create_attached_thread(JavaThread* thread) { |
aoqi@0 | 868 | #ifdef ASSERT |
aoqi@0 | 869 | thread->verify_not_published(); |
aoqi@0 | 870 | #endif |
aoqi@0 | 871 | |
aoqi@0 | 872 | // Allocate the OSThread object |
aoqi@0 | 873 | OSThread* osthread = new OSThread(NULL, NULL); |
aoqi@0 | 874 | |
aoqi@0 | 875 | if (osthread == NULL) { |
aoqi@0 | 876 | return false; |
aoqi@0 | 877 | } |
aoqi@0 | 878 | |
aoqi@0 | 879 | osthread->set_thread_id(os::Bsd::gettid()); |
aoqi@0 | 880 | |
aoqi@0 | 881 | // Store pthread info into the OSThread |
aoqi@0 | 882 | #ifdef __APPLE__ |
aoqi@0 | 883 | uint64_t unique_thread_id = locate_unique_thread_id(osthread->thread_id()); |
aoqi@0 | 884 | guarantee(unique_thread_id != 0, "just checking"); |
aoqi@0 | 885 | osthread->set_unique_thread_id(unique_thread_id); |
aoqi@0 | 886 | #endif |
aoqi@0 | 887 | osthread->set_pthread_id(::pthread_self()); |
aoqi@0 | 888 | |
aoqi@0 | 889 | // initialize floating point control register |
aoqi@0 | 890 | os::Bsd::init_thread_fpu_state(); |
aoqi@0 | 891 | |
aoqi@0 | 892 | // Initial thread state is RUNNABLE |
aoqi@0 | 893 | osthread->set_state(RUNNABLE); |
aoqi@0 | 894 | |
aoqi@0 | 895 | thread->set_osthread(osthread); |
aoqi@0 | 896 | |
aoqi@0 | 897 | // initialize signal mask for this thread |
aoqi@0 | 898 | // and save the caller's signal mask |
aoqi@0 | 899 | os::Bsd::hotspot_sigmask(thread); |
aoqi@0 | 900 | |
aoqi@0 | 901 | return true; |
aoqi@0 | 902 | } |
aoqi@0 | 903 | |
aoqi@0 | 904 | void os::pd_start_thread(Thread* thread) { |
aoqi@0 | 905 | OSThread * osthread = thread->osthread(); |
aoqi@0 | 906 | assert(osthread->get_state() != INITIALIZED, "just checking"); |
aoqi@0 | 907 | Monitor* sync_with_child = osthread->startThread_lock(); |
aoqi@0 | 908 | MutexLockerEx ml(sync_with_child, Mutex::_no_safepoint_check_flag); |
aoqi@0 | 909 | sync_with_child->notify(); |
aoqi@0 | 910 | } |
aoqi@0 | 911 | |
aoqi@0 | 912 | // Free Bsd resources related to the OSThread |
aoqi@0 | 913 | void os::free_thread(OSThread* osthread) { |
aoqi@0 | 914 | assert(osthread != NULL, "osthread not set"); |
aoqi@0 | 915 | |
aoqi@0 | 916 | if (Thread::current()->osthread() == osthread) { |
aoqi@0 | 917 | // Restore caller's signal mask |
aoqi@0 | 918 | sigset_t sigmask = osthread->caller_sigmask(); |
aoqi@0 | 919 | pthread_sigmask(SIG_SETMASK, &sigmask, NULL); |
aoqi@0 | 920 | } |
aoqi@0 | 921 | |
aoqi@0 | 922 | delete osthread; |
aoqi@0 | 923 | } |
aoqi@0 | 924 | |
aoqi@0 | 925 | ////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 926 | // thread local storage |
aoqi@0 | 927 | |
aoqi@0 | 928 | // Restore the thread pointer if the destructor is called. This is in case |
aoqi@0 | 929 | // someone from JNI code sets up a destructor with pthread_key_create to run |
aoqi@0 | 930 | // detachCurrentThread on thread death. Unless we restore the thread pointer we |
aoqi@0 | 931 | // will hang or crash. When detachCurrentThread is called the key will be set |
aoqi@0 | 932 | // to null and we will not be called again. If detachCurrentThread is never |
aoqi@0 | 933 | // called we could loop forever depending on the pthread implementation. |
aoqi@0 | 934 | static void restore_thread_pointer(void* p) { |
aoqi@0 | 935 | Thread* thread = (Thread*) p; |
aoqi@0 | 936 | os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); |
aoqi@0 | 937 | } |
aoqi@0 | 938 | |
aoqi@0 | 939 | int os::allocate_thread_local_storage() { |
aoqi@0 | 940 | pthread_key_t key; |
aoqi@0 | 941 | int rslt = pthread_key_create(&key, restore_thread_pointer); |
aoqi@0 | 942 | assert(rslt == 0, "cannot allocate thread local storage"); |
aoqi@0 | 943 | return (int)key; |
aoqi@0 | 944 | } |
aoqi@0 | 945 | |
aoqi@0 | 946 | // Note: This is currently not used by VM, as we don't destroy TLS key |
aoqi@0 | 947 | // on VM exit. |
aoqi@0 | 948 | void os::free_thread_local_storage(int index) { |
aoqi@0 | 949 | int rslt = pthread_key_delete((pthread_key_t)index); |
aoqi@0 | 950 | assert(rslt == 0, "invalid index"); |
aoqi@0 | 951 | } |
aoqi@0 | 952 | |
aoqi@0 | 953 | void os::thread_local_storage_at_put(int index, void* value) { |
aoqi@0 | 954 | int rslt = pthread_setspecific((pthread_key_t)index, value); |
aoqi@0 | 955 | assert(rslt == 0, "pthread_setspecific failed"); |
aoqi@0 | 956 | } |
aoqi@0 | 957 | |
aoqi@0 | 958 | extern "C" Thread* get_thread() { |
aoqi@0 | 959 | return ThreadLocalStorage::thread(); |
aoqi@0 | 960 | } |
aoqi@0 | 961 | |
aoqi@0 | 962 | |
aoqi@0 | 963 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 964 | // time support |
aoqi@0 | 965 | |
aoqi@0 | 966 | // Time since start-up in seconds to a fine granularity. |
aoqi@0 | 967 | // Used by VMSelfDestructTimer and the MemProfiler. |
aoqi@0 | 968 | double os::elapsedTime() { |
aoqi@0 | 969 | |
aoqi@0 | 970 | return ((double)os::elapsed_counter()) / os::elapsed_frequency(); |
aoqi@0 | 971 | } |
aoqi@0 | 972 | |
aoqi@0 | 973 | jlong os::elapsed_counter() { |
aoqi@0 | 974 | return javaTimeNanos() - initial_time_count; |
aoqi@0 | 975 | } |
aoqi@0 | 976 | |
aoqi@0 | 977 | jlong os::elapsed_frequency() { |
aoqi@0 | 978 | return NANOSECS_PER_SEC; // nanosecond resolution |
aoqi@0 | 979 | } |
aoqi@0 | 980 | |
aoqi@0 | 981 | bool os::supports_vtime() { return true; } |
aoqi@0 | 982 | bool os::enable_vtime() { return false; } |
aoqi@0 | 983 | bool os::vtime_enabled() { return false; } |
aoqi@0 | 984 | |
aoqi@0 | 985 | double os::elapsedVTime() { |
aoqi@0 | 986 | // better than nothing, but not much |
aoqi@0 | 987 | return elapsedTime(); |
aoqi@0 | 988 | } |
aoqi@0 | 989 | |
aoqi@0 | 990 | jlong os::javaTimeMillis() { |
aoqi@0 | 991 | timeval time; |
aoqi@0 | 992 | int status = gettimeofday(&time, NULL); |
aoqi@0 | 993 | assert(status != -1, "bsd error"); |
aoqi@0 | 994 | return jlong(time.tv_sec) * 1000 + jlong(time.tv_usec / 1000); |
aoqi@0 | 995 | } |
aoqi@0 | 996 | |
aoqi@0 | 997 | #ifndef __APPLE__ |
aoqi@0 | 998 | #ifndef CLOCK_MONOTONIC |
aoqi@0 | 999 | #define CLOCK_MONOTONIC (1) |
aoqi@0 | 1000 | #endif |
aoqi@0 | 1001 | #endif |
aoqi@0 | 1002 | |
aoqi@0 | 1003 | #ifdef __APPLE__ |
aoqi@0 | 1004 | void os::Bsd::clock_init() { |
aoqi@0 | 1005 | mach_timebase_info(&_timebase_info); |
aoqi@0 | 1006 | } |
aoqi@0 | 1007 | #else |
aoqi@0 | 1008 | void os::Bsd::clock_init() { |
aoqi@0 | 1009 | struct timespec res; |
aoqi@0 | 1010 | struct timespec tp; |
aoqi@0 | 1011 | if (::clock_getres(CLOCK_MONOTONIC, &res) == 0 && |
aoqi@0 | 1012 | ::clock_gettime(CLOCK_MONOTONIC, &tp) == 0) { |
aoqi@0 | 1013 | // yes, monotonic clock is supported |
aoqi@0 | 1014 | _clock_gettime = ::clock_gettime; |
aoqi@0 | 1015 | } |
aoqi@0 | 1016 | } |
aoqi@0 | 1017 | #endif |
aoqi@0 | 1018 | |
aoqi@0 | 1019 | |
aoqi@0 | 1020 | #ifdef __APPLE__ |
aoqi@0 | 1021 | |
aoqi@0 | 1022 | jlong os::javaTimeNanos() { |
aoqi@0 | 1023 | const uint64_t tm = mach_absolute_time(); |
aoqi@0 | 1024 | const uint64_t now = (tm * Bsd::_timebase_info.numer) / Bsd::_timebase_info.denom; |
aoqi@0 | 1025 | const uint64_t prev = Bsd::_max_abstime; |
aoqi@0 | 1026 | if (now <= prev) { |
aoqi@0 | 1027 | return prev; // same or retrograde time; |
aoqi@0 | 1028 | } |
aoqi@0 | 1029 | const uint64_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&Bsd::_max_abstime, prev); |
aoqi@0 | 1030 | assert(obsv >= prev, "invariant"); // Monotonicity |
aoqi@0 | 1031 | // If the CAS succeeded then we're done and return "now". |
aoqi@0 | 1032 | // If the CAS failed and the observed value "obsv" is >= now then |
aoqi@0 | 1033 | // we should return "obsv". If the CAS failed and now > obsv > prv then |
aoqi@0 | 1034 | // some other thread raced this thread and installed a new value, in which case |
aoqi@0 | 1035 | // we could either (a) retry the entire operation, (b) retry trying to install now |
aoqi@0 | 1036 | // or (c) just return obsv. We use (c). No loop is required although in some cases |
aoqi@0 | 1037 | // we might discard a higher "now" value in deference to a slightly lower but freshly |
aoqi@0 | 1038 | // installed obsv value. That's entirely benign -- it admits no new orderings compared |
aoqi@0 | 1039 | // to (a) or (b) -- and greatly reduces coherence traffic. |
aoqi@0 | 1040 | // We might also condition (c) on the magnitude of the delta between obsv and now. |
aoqi@0 | 1041 | // Avoiding excessive CAS operations to hot RW locations is critical. |
aoqi@0 | 1042 | // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate |
aoqi@0 | 1043 | return (prev == obsv) ? now : obsv; |
aoqi@0 | 1044 | } |
aoqi@0 | 1045 | |
aoqi@0 | 1046 | #else // __APPLE__ |
aoqi@0 | 1047 | |
aoqi@0 | 1048 | jlong os::javaTimeNanos() { |
aoqi@0 | 1049 | if (Bsd::supports_monotonic_clock()) { |
aoqi@0 | 1050 | struct timespec tp; |
aoqi@0 | 1051 | int status = Bsd::_clock_gettime(CLOCK_MONOTONIC, &tp); |
aoqi@0 | 1052 | assert(status == 0, "gettime error"); |
aoqi@0 | 1053 | jlong result = jlong(tp.tv_sec) * (1000 * 1000 * 1000) + jlong(tp.tv_nsec); |
aoqi@0 | 1054 | return result; |
aoqi@0 | 1055 | } else { |
aoqi@0 | 1056 | timeval time; |
aoqi@0 | 1057 | int status = gettimeofday(&time, NULL); |
aoqi@0 | 1058 | assert(status != -1, "bsd error"); |
aoqi@0 | 1059 | jlong usecs = jlong(time.tv_sec) * (1000 * 1000) + jlong(time.tv_usec); |
aoqi@0 | 1060 | return 1000 * usecs; |
aoqi@0 | 1061 | } |
aoqi@0 | 1062 | } |
aoqi@0 | 1063 | |
aoqi@0 | 1064 | #endif // __APPLE__ |
aoqi@0 | 1065 | |
aoqi@0 | 1066 | void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { |
aoqi@0 | 1067 | if (Bsd::supports_monotonic_clock()) { |
aoqi@0 | 1068 | info_ptr->max_value = ALL_64_BITS; |
aoqi@0 | 1069 | |
aoqi@0 | 1070 | // CLOCK_MONOTONIC - amount of time since some arbitrary point in the past |
aoqi@0 | 1071 | info_ptr->may_skip_backward = false; // not subject to resetting or drifting |
aoqi@0 | 1072 | info_ptr->may_skip_forward = false; // not subject to resetting or drifting |
aoqi@0 | 1073 | } else { |
aoqi@0 | 1074 | // gettimeofday - based on time in seconds since the Epoch thus does not wrap |
aoqi@0 | 1075 | info_ptr->max_value = ALL_64_BITS; |
aoqi@0 | 1076 | |
aoqi@0 | 1077 | // gettimeofday is a real time clock so it skips |
aoqi@0 | 1078 | info_ptr->may_skip_backward = true; |
aoqi@0 | 1079 | info_ptr->may_skip_forward = true; |
aoqi@0 | 1080 | } |
aoqi@0 | 1081 | |
aoqi@0 | 1082 | info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time |
aoqi@0 | 1083 | } |
aoqi@0 | 1084 | |
aoqi@0 | 1085 | // Return the real, user, and system times in seconds from an |
aoqi@0 | 1086 | // arbitrary fixed point in the past. |
aoqi@0 | 1087 | bool os::getTimesSecs(double* process_real_time, |
aoqi@0 | 1088 | double* process_user_time, |
aoqi@0 | 1089 | double* process_system_time) { |
aoqi@0 | 1090 | struct tms ticks; |
aoqi@0 | 1091 | clock_t real_ticks = times(&ticks); |
aoqi@0 | 1092 | |
aoqi@0 | 1093 | if (real_ticks == (clock_t) (-1)) { |
aoqi@0 | 1094 | return false; |
aoqi@0 | 1095 | } else { |
aoqi@0 | 1096 | double ticks_per_second = (double) clock_tics_per_sec; |
aoqi@0 | 1097 | *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; |
aoqi@0 | 1098 | *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; |
aoqi@0 | 1099 | *process_real_time = ((double) real_ticks) / ticks_per_second; |
aoqi@0 | 1100 | |
aoqi@0 | 1101 | return true; |
aoqi@0 | 1102 | } |
aoqi@0 | 1103 | } |
aoqi@0 | 1104 | |
aoqi@0 | 1105 | |
aoqi@0 | 1106 | char * os::local_time_string(char *buf, size_t buflen) { |
aoqi@0 | 1107 | struct tm t; |
aoqi@0 | 1108 | time_t long_time; |
aoqi@0 | 1109 | time(&long_time); |
aoqi@0 | 1110 | localtime_r(&long_time, &t); |
aoqi@0 | 1111 | jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", |
aoqi@0 | 1112 | t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, |
aoqi@0 | 1113 | t.tm_hour, t.tm_min, t.tm_sec); |
aoqi@0 | 1114 | return buf; |
aoqi@0 | 1115 | } |
aoqi@0 | 1116 | |
aoqi@0 | 1117 | struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { |
aoqi@0 | 1118 | return localtime_r(clock, res); |
aoqi@0 | 1119 | } |
aoqi@0 | 1120 | |
aoqi@0 | 1121 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1122 | // runtime exit support |
aoqi@0 | 1123 | |
aoqi@0 | 1124 | // Note: os::shutdown() might be called very early during initialization, or |
aoqi@0 | 1125 | // called from signal handler. Before adding something to os::shutdown(), make |
aoqi@0 | 1126 | // sure it is async-safe and can handle partially initialized VM. |
aoqi@0 | 1127 | void os::shutdown() { |
aoqi@0 | 1128 | |
aoqi@0 | 1129 | // allow PerfMemory to attempt cleanup of any persistent resources |
aoqi@0 | 1130 | perfMemory_exit(); |
aoqi@0 | 1131 | |
aoqi@0 | 1132 | // needs to remove object in file system |
aoqi@0 | 1133 | AttachListener::abort(); |
aoqi@0 | 1134 | |
aoqi@0 | 1135 | // flush buffered output, finish log files |
aoqi@0 | 1136 | ostream_abort(); |
aoqi@0 | 1137 | |
aoqi@0 | 1138 | // Check for abort hook |
aoqi@0 | 1139 | abort_hook_t abort_hook = Arguments::abort_hook(); |
aoqi@0 | 1140 | if (abort_hook != NULL) { |
aoqi@0 | 1141 | abort_hook(); |
aoqi@0 | 1142 | } |
aoqi@0 | 1143 | |
aoqi@0 | 1144 | } |
aoqi@0 | 1145 | |
aoqi@0 | 1146 | // Note: os::abort() might be called very early during initialization, or |
aoqi@0 | 1147 | // called from signal handler. Before adding something to os::abort(), make |
aoqi@0 | 1148 | // sure it is async-safe and can handle partially initialized VM. |
aoqi@0 | 1149 | void os::abort(bool dump_core) { |
aoqi@0 | 1150 | os::shutdown(); |
aoqi@0 | 1151 | if (dump_core) { |
aoqi@0 | 1152 | #ifndef PRODUCT |
aoqi@0 | 1153 | fdStream out(defaultStream::output_fd()); |
aoqi@0 | 1154 | out.print_raw("Current thread is "); |
aoqi@0 | 1155 | char buf[16]; |
aoqi@0 | 1156 | jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); |
aoqi@0 | 1157 | out.print_raw_cr(buf); |
aoqi@0 | 1158 | out.print_raw_cr("Dumping core ..."); |
aoqi@0 | 1159 | #endif |
aoqi@0 | 1160 | ::abort(); // dump core |
aoqi@0 | 1161 | } |
aoqi@0 | 1162 | |
aoqi@0 | 1163 | ::exit(1); |
aoqi@0 | 1164 | } |
aoqi@0 | 1165 | |
aoqi@0 | 1166 | // Die immediately, no exit hook, no abort hook, no cleanup. |
aoqi@0 | 1167 | void os::die() { |
aoqi@0 | 1168 | // _exit() on BsdThreads only kills current thread |
aoqi@0 | 1169 | ::abort(); |
aoqi@0 | 1170 | } |
aoqi@0 | 1171 | |
aoqi@0 | 1172 | // This method is a copy of JDK's sysGetLastErrorString |
aoqi@0 | 1173 | // from src/solaris/hpi/src/system_md.c |
aoqi@0 | 1174 | |
aoqi@0 | 1175 | size_t os::lasterror(char *buf, size_t len) { |
aoqi@0 | 1176 | |
aoqi@0 | 1177 | if (errno == 0) return 0; |
aoqi@0 | 1178 | |
aoqi@0 | 1179 | const char *s = ::strerror(errno); |
aoqi@0 | 1180 | size_t n = ::strlen(s); |
aoqi@0 | 1181 | if (n >= len) { |
aoqi@0 | 1182 | n = len - 1; |
aoqi@0 | 1183 | } |
aoqi@0 | 1184 | ::strncpy(buf, s, n); |
aoqi@0 | 1185 | buf[n] = '\0'; |
aoqi@0 | 1186 | return n; |
aoqi@0 | 1187 | } |
aoqi@0 | 1188 | |
aoqi@0 | 1189 | // Information of current thread in variety of formats |
aoqi@0 | 1190 | pid_t os::Bsd::gettid() { |
aoqi@0 | 1191 | int retval = -1; |
aoqi@0 | 1192 | |
aoqi@0 | 1193 | #ifdef __APPLE__ //XNU kernel |
aoqi@0 | 1194 | // despite the fact mach port is actually not a thread id use it |
aoqi@0 | 1195 | // instead of syscall(SYS_thread_selfid) as it certainly fits to u4 |
aoqi@0 | 1196 | retval = ::pthread_mach_thread_np(::pthread_self()); |
aoqi@0 | 1197 | guarantee(retval != 0, "just checking"); |
aoqi@0 | 1198 | return retval; |
aoqi@0 | 1199 | |
dholmes@7808 | 1200 | #else |
dholmes@7808 | 1201 | #ifdef __FreeBSD__ |
aoqi@0 | 1202 | retval = syscall(SYS_thr_self); |
dholmes@7808 | 1203 | #else |
dholmes@7808 | 1204 | #ifdef __OpenBSD__ |
aoqi@0 | 1205 | retval = syscall(SYS_getthrid); |
dholmes@7808 | 1206 | #else |
dholmes@7808 | 1207 | #ifdef __NetBSD__ |
aoqi@0 | 1208 | retval = (pid_t) syscall(SYS__lwp_self); |
dholmes@7808 | 1209 | #endif |
dholmes@7808 | 1210 | #endif |
dholmes@7808 | 1211 | #endif |
aoqi@0 | 1212 | #endif |
aoqi@0 | 1213 | |
aoqi@0 | 1214 | if (retval == -1) { |
aoqi@0 | 1215 | return getpid(); |
aoqi@0 | 1216 | } |
aoqi@0 | 1217 | } |
aoqi@0 | 1218 | |
aoqi@0 | 1219 | intx os::current_thread_id() { |
aoqi@0 | 1220 | #ifdef __APPLE__ |
aoqi@0 | 1221 | return (intx)::pthread_mach_thread_np(::pthread_self()); |
aoqi@0 | 1222 | #else |
aoqi@0 | 1223 | return (intx)::pthread_self(); |
aoqi@0 | 1224 | #endif |
aoqi@0 | 1225 | } |
aoqi@0 | 1226 | |
aoqi@0 | 1227 | int os::current_process_id() { |
aoqi@0 | 1228 | |
aoqi@0 | 1229 | // Under the old bsd thread library, bsd gives each thread |
aoqi@0 | 1230 | // its own process id. Because of this each thread will return |
aoqi@0 | 1231 | // a different pid if this method were to return the result |
aoqi@0 | 1232 | // of getpid(2). Bsd provides no api that returns the pid |
aoqi@0 | 1233 | // of the launcher thread for the vm. This implementation |
aoqi@0 | 1234 | // returns a unique pid, the pid of the launcher thread |
aoqi@0 | 1235 | // that starts the vm 'process'. |
aoqi@0 | 1236 | |
aoqi@0 | 1237 | // Under the NPTL, getpid() returns the same pid as the |
aoqi@0 | 1238 | // launcher thread rather than a unique pid per thread. |
aoqi@0 | 1239 | // Use gettid() if you want the old pre NPTL behaviour. |
aoqi@0 | 1240 | |
aoqi@0 | 1241 | // if you are looking for the result of a call to getpid() that |
aoqi@0 | 1242 | // returns a unique pid for the calling thread, then look at the |
aoqi@0 | 1243 | // OSThread::thread_id() method in osThread_bsd.hpp file |
aoqi@0 | 1244 | |
aoqi@0 | 1245 | return (int)(_initial_pid ? _initial_pid : getpid()); |
aoqi@0 | 1246 | } |
aoqi@0 | 1247 | |
aoqi@0 | 1248 | // DLL functions |
aoqi@0 | 1249 | |
aoqi@0 | 1250 | #define JNI_LIB_PREFIX "lib" |
aoqi@0 | 1251 | #ifdef __APPLE__ |
aoqi@0 | 1252 | #define JNI_LIB_SUFFIX ".dylib" |
aoqi@0 | 1253 | #else |
aoqi@0 | 1254 | #define JNI_LIB_SUFFIX ".so" |
aoqi@0 | 1255 | #endif |
aoqi@0 | 1256 | |
aoqi@0 | 1257 | const char* os::dll_file_extension() { return JNI_LIB_SUFFIX; } |
aoqi@0 | 1258 | |
aoqi@0 | 1259 | // This must be hard coded because it's the system's temporary |
aoqi@0 | 1260 | // directory not the java application's temp directory, ala java.io.tmpdir. |
aoqi@0 | 1261 | #ifdef __APPLE__ |
aoqi@0 | 1262 | // macosx has a secure per-user temporary directory |
aoqi@0 | 1263 | char temp_path_storage[PATH_MAX]; |
aoqi@0 | 1264 | const char* os::get_temp_directory() { |
aoqi@0 | 1265 | static char *temp_path = NULL; |
aoqi@0 | 1266 | if (temp_path == NULL) { |
aoqi@0 | 1267 | int pathSize = confstr(_CS_DARWIN_USER_TEMP_DIR, temp_path_storage, PATH_MAX); |
aoqi@0 | 1268 | if (pathSize == 0 || pathSize > PATH_MAX) { |
aoqi@0 | 1269 | strlcpy(temp_path_storage, "/tmp/", sizeof(temp_path_storage)); |
aoqi@0 | 1270 | } |
aoqi@0 | 1271 | temp_path = temp_path_storage; |
aoqi@0 | 1272 | } |
aoqi@0 | 1273 | return temp_path; |
aoqi@0 | 1274 | } |
aoqi@0 | 1275 | #else /* __APPLE__ */ |
aoqi@0 | 1276 | const char* os::get_temp_directory() { return "/tmp"; } |
aoqi@0 | 1277 | #endif /* __APPLE__ */ |
aoqi@0 | 1278 | |
aoqi@0 | 1279 | static bool file_exists(const char* filename) { |
aoqi@0 | 1280 | struct stat statbuf; |
aoqi@0 | 1281 | if (filename == NULL || strlen(filename) == 0) { |
aoqi@0 | 1282 | return false; |
aoqi@0 | 1283 | } |
aoqi@0 | 1284 | return os::stat(filename, &statbuf) == 0; |
aoqi@0 | 1285 | } |
aoqi@0 | 1286 | |
aoqi@0 | 1287 | bool os::dll_build_name(char* buffer, size_t buflen, |
aoqi@0 | 1288 | const char* pname, const char* fname) { |
aoqi@0 | 1289 | bool retval = false; |
aoqi@0 | 1290 | // Copied from libhpi |
aoqi@0 | 1291 | const size_t pnamelen = pname ? strlen(pname) : 0; |
aoqi@0 | 1292 | |
aoqi@0 | 1293 | // Return error on buffer overflow. |
aoqi@0 | 1294 | if (pnamelen + strlen(fname) + strlen(JNI_LIB_PREFIX) + strlen(JNI_LIB_SUFFIX) + 2 > buflen) { |
aoqi@0 | 1295 | return retval; |
aoqi@0 | 1296 | } |
aoqi@0 | 1297 | |
aoqi@0 | 1298 | if (pnamelen == 0) { |
aoqi@0 | 1299 | snprintf(buffer, buflen, JNI_LIB_PREFIX "%s" JNI_LIB_SUFFIX, fname); |
aoqi@0 | 1300 | retval = true; |
aoqi@0 | 1301 | } else if (strchr(pname, *os::path_separator()) != NULL) { |
aoqi@0 | 1302 | int n; |
aoqi@0 | 1303 | char** pelements = split_path(pname, &n); |
aoqi@0 | 1304 | if (pelements == NULL) { |
aoqi@0 | 1305 | return false; |
aoqi@0 | 1306 | } |
aoqi@0 | 1307 | for (int i = 0 ; i < n ; i++) { |
aoqi@0 | 1308 | // Really shouldn't be NULL, but check can't hurt |
aoqi@0 | 1309 | if (pelements[i] == NULL || strlen(pelements[i]) == 0) { |
aoqi@0 | 1310 | continue; // skip the empty path values |
aoqi@0 | 1311 | } |
aoqi@0 | 1312 | snprintf(buffer, buflen, "%s/" JNI_LIB_PREFIX "%s" JNI_LIB_SUFFIX, |
aoqi@0 | 1313 | pelements[i], fname); |
aoqi@0 | 1314 | if (file_exists(buffer)) { |
aoqi@0 | 1315 | retval = true; |
aoqi@0 | 1316 | break; |
aoqi@0 | 1317 | } |
aoqi@0 | 1318 | } |
aoqi@0 | 1319 | // release the storage |
aoqi@0 | 1320 | for (int i = 0 ; i < n ; i++) { |
aoqi@0 | 1321 | if (pelements[i] != NULL) { |
aoqi@0 | 1322 | FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); |
aoqi@0 | 1323 | } |
aoqi@0 | 1324 | } |
aoqi@0 | 1325 | if (pelements != NULL) { |
aoqi@0 | 1326 | FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); |
aoqi@0 | 1327 | } |
aoqi@0 | 1328 | } else { |
aoqi@0 | 1329 | snprintf(buffer, buflen, "%s/" JNI_LIB_PREFIX "%s" JNI_LIB_SUFFIX, pname, fname); |
aoqi@0 | 1330 | retval = true; |
aoqi@0 | 1331 | } |
aoqi@0 | 1332 | return retval; |
aoqi@0 | 1333 | } |
aoqi@0 | 1334 | |
aoqi@0 | 1335 | // check if addr is inside libjvm.so |
aoqi@0 | 1336 | bool os::address_is_in_vm(address addr) { |
aoqi@0 | 1337 | static address libjvm_base_addr; |
aoqi@0 | 1338 | Dl_info dlinfo; |
aoqi@0 | 1339 | |
aoqi@0 | 1340 | if (libjvm_base_addr == NULL) { |
aoqi@0 | 1341 | if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { |
aoqi@0 | 1342 | libjvm_base_addr = (address)dlinfo.dli_fbase; |
aoqi@0 | 1343 | } |
aoqi@0 | 1344 | assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); |
aoqi@0 | 1345 | } |
aoqi@0 | 1346 | |
aoqi@0 | 1347 | if (dladdr((void *)addr, &dlinfo) != 0) { |
aoqi@0 | 1348 | if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; |
aoqi@0 | 1349 | } |
aoqi@0 | 1350 | |
aoqi@0 | 1351 | return false; |
aoqi@0 | 1352 | } |
aoqi@0 | 1353 | |
aoqi@0 | 1354 | |
aoqi@0 | 1355 | #define MACH_MAXSYMLEN 256 |
aoqi@0 | 1356 | |
aoqi@0 | 1357 | bool os::dll_address_to_function_name(address addr, char *buf, |
aoqi@0 | 1358 | int buflen, int *offset) { |
aoqi@0 | 1359 | // buf is not optional, but offset is optional |
aoqi@0 | 1360 | assert(buf != NULL, "sanity check"); |
aoqi@0 | 1361 | |
aoqi@0 | 1362 | Dl_info dlinfo; |
aoqi@0 | 1363 | char localbuf[MACH_MAXSYMLEN]; |
aoqi@0 | 1364 | |
aoqi@0 | 1365 | if (dladdr((void*)addr, &dlinfo) != 0) { |
aoqi@0 | 1366 | // see if we have a matching symbol |
aoqi@0 | 1367 | if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { |
aoqi@0 | 1368 | if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { |
aoqi@0 | 1369 | jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); |
aoqi@0 | 1370 | } |
aoqi@0 | 1371 | if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; |
aoqi@0 | 1372 | return true; |
aoqi@0 | 1373 | } |
aoqi@0 | 1374 | // no matching symbol so try for just file info |
aoqi@0 | 1375 | if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { |
aoqi@0 | 1376 | if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), |
aoqi@0 | 1377 | buf, buflen, offset, dlinfo.dli_fname)) { |
aoqi@0 | 1378 | return true; |
aoqi@0 | 1379 | } |
aoqi@0 | 1380 | } |
aoqi@0 | 1381 | |
aoqi@0 | 1382 | // Handle non-dynamic manually: |
aoqi@0 | 1383 | if (dlinfo.dli_fbase != NULL && |
aoqi@0 | 1384 | Decoder::decode(addr, localbuf, MACH_MAXSYMLEN, offset, |
aoqi@0 | 1385 | dlinfo.dli_fbase)) { |
aoqi@0 | 1386 | if (!Decoder::demangle(localbuf, buf, buflen)) { |
aoqi@0 | 1387 | jio_snprintf(buf, buflen, "%s", localbuf); |
aoqi@0 | 1388 | } |
aoqi@0 | 1389 | return true; |
aoqi@0 | 1390 | } |
aoqi@0 | 1391 | } |
aoqi@0 | 1392 | buf[0] = '\0'; |
aoqi@0 | 1393 | if (offset != NULL) *offset = -1; |
aoqi@0 | 1394 | return false; |
aoqi@0 | 1395 | } |
aoqi@0 | 1396 | |
aoqi@0 | 1397 | // ported from solaris version |
aoqi@0 | 1398 | bool os::dll_address_to_library_name(address addr, char* buf, |
aoqi@0 | 1399 | int buflen, int* offset) { |
aoqi@0 | 1400 | // buf is not optional, but offset is optional |
aoqi@0 | 1401 | assert(buf != NULL, "sanity check"); |
aoqi@0 | 1402 | |
aoqi@0 | 1403 | Dl_info dlinfo; |
aoqi@0 | 1404 | |
aoqi@0 | 1405 | if (dladdr((void*)addr, &dlinfo) != 0) { |
aoqi@0 | 1406 | if (dlinfo.dli_fname != NULL) { |
aoqi@0 | 1407 | jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); |
aoqi@0 | 1408 | } |
aoqi@0 | 1409 | if (dlinfo.dli_fbase != NULL && offset != NULL) { |
aoqi@0 | 1410 | *offset = addr - (address)dlinfo.dli_fbase; |
aoqi@0 | 1411 | } |
aoqi@0 | 1412 | return true; |
aoqi@0 | 1413 | } |
aoqi@0 | 1414 | |
aoqi@0 | 1415 | buf[0] = '\0'; |
aoqi@0 | 1416 | if (offset) *offset = -1; |
aoqi@0 | 1417 | return false; |
aoqi@0 | 1418 | } |
aoqi@0 | 1419 | |
aoqi@0 | 1420 | // Loads .dll/.so and |
aoqi@0 | 1421 | // in case of error it checks if .dll/.so was built for the |
aoqi@0 | 1422 | // same architecture as Hotspot is running on |
aoqi@0 | 1423 | |
aoqi@0 | 1424 | #ifdef __APPLE__ |
aoqi@0 | 1425 | void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { |
aoqi@0 | 1426 | void * result= ::dlopen(filename, RTLD_LAZY); |
aoqi@0 | 1427 | if (result != NULL) { |
aoqi@0 | 1428 | // Successful loading |
aoqi@0 | 1429 | return result; |
aoqi@0 | 1430 | } |
aoqi@0 | 1431 | |
aoqi@0 | 1432 | // Read system error message into ebuf |
aoqi@0 | 1433 | ::strncpy(ebuf, ::dlerror(), ebuflen-1); |
aoqi@0 | 1434 | ebuf[ebuflen-1]='\0'; |
aoqi@0 | 1435 | |
aoqi@0 | 1436 | return NULL; |
aoqi@0 | 1437 | } |
aoqi@0 | 1438 | #else |
aoqi@0 | 1439 | void * os::dll_load(const char *filename, char *ebuf, int ebuflen) |
aoqi@0 | 1440 | { |
aoqi@0 | 1441 | void * result= ::dlopen(filename, RTLD_LAZY); |
aoqi@0 | 1442 | if (result != NULL) { |
aoqi@0 | 1443 | // Successful loading |
aoqi@0 | 1444 | return result; |
aoqi@0 | 1445 | } |
aoqi@0 | 1446 | |
aoqi@0 | 1447 | Elf32_Ehdr elf_head; |
aoqi@0 | 1448 | |
aoqi@0 | 1449 | // Read system error message into ebuf |
aoqi@0 | 1450 | // It may or may not be overwritten below |
aoqi@0 | 1451 | ::strncpy(ebuf, ::dlerror(), ebuflen-1); |
aoqi@0 | 1452 | ebuf[ebuflen-1]='\0'; |
aoqi@0 | 1453 | int diag_msg_max_length=ebuflen-strlen(ebuf); |
aoqi@0 | 1454 | char* diag_msg_buf=ebuf+strlen(ebuf); |
aoqi@0 | 1455 | |
aoqi@0 | 1456 | if (diag_msg_max_length==0) { |
aoqi@0 | 1457 | // No more space in ebuf for additional diagnostics message |
aoqi@0 | 1458 | return NULL; |
aoqi@0 | 1459 | } |
aoqi@0 | 1460 | |
aoqi@0 | 1461 | |
aoqi@0 | 1462 | int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); |
aoqi@0 | 1463 | |
aoqi@0 | 1464 | if (file_descriptor < 0) { |
aoqi@0 | 1465 | // Can't open library, report dlerror() message |
aoqi@0 | 1466 | return NULL; |
aoqi@0 | 1467 | } |
aoqi@0 | 1468 | |
aoqi@0 | 1469 | bool failed_to_read_elf_head= |
aoqi@0 | 1470 | (sizeof(elf_head)!= |
aoqi@0 | 1471 | (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; |
aoqi@0 | 1472 | |
aoqi@0 | 1473 | ::close(file_descriptor); |
aoqi@0 | 1474 | if (failed_to_read_elf_head) { |
aoqi@0 | 1475 | // file i/o error - report dlerror() msg |
aoqi@0 | 1476 | return NULL; |
aoqi@0 | 1477 | } |
aoqi@0 | 1478 | |
aoqi@0 | 1479 | typedef struct { |
aoqi@0 | 1480 | Elf32_Half code; // Actual value as defined in elf.h |
aoqi@0 | 1481 | Elf32_Half compat_class; // Compatibility of archs at VM's sense |
aoqi@0 | 1482 | char elf_class; // 32 or 64 bit |
aoqi@0 | 1483 | char endianess; // MSB or LSB |
aoqi@0 | 1484 | char* name; // String representation |
aoqi@0 | 1485 | } arch_t; |
aoqi@0 | 1486 | |
aoqi@0 | 1487 | #ifndef EM_486 |
aoqi@0 | 1488 | #define EM_486 6 /* Intel 80486 */ |
aoqi@0 | 1489 | #endif |
aoqi@0 | 1490 | |
aoqi@0 | 1491 | #ifndef EM_MIPS_RS3_LE |
aoqi@0 | 1492 | #define EM_MIPS_RS3_LE 10 /* MIPS */ |
aoqi@0 | 1493 | #endif |
aoqi@0 | 1494 | |
aoqi@0 | 1495 | #ifndef EM_PPC64 |
aoqi@0 | 1496 | #define EM_PPC64 21 /* PowerPC64 */ |
aoqi@0 | 1497 | #endif |
aoqi@0 | 1498 | |
aoqi@0 | 1499 | #ifndef EM_S390 |
aoqi@0 | 1500 | #define EM_S390 22 /* IBM System/390 */ |
aoqi@0 | 1501 | #endif |
aoqi@0 | 1502 | |
aoqi@0 | 1503 | #ifndef EM_IA_64 |
aoqi@0 | 1504 | #define EM_IA_64 50 /* HP/Intel IA-64 */ |
aoqi@0 | 1505 | #endif |
aoqi@0 | 1506 | |
aoqi@0 | 1507 | #ifndef EM_X86_64 |
aoqi@0 | 1508 | #define EM_X86_64 62 /* AMD x86-64 */ |
aoqi@0 | 1509 | #endif |
aoqi@0 | 1510 | |
aoqi@0 | 1511 | static const arch_t arch_array[]={ |
aoqi@0 | 1512 | {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, |
aoqi@0 | 1513 | {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, |
aoqi@0 | 1514 | {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, |
aoqi@0 | 1515 | {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, |
aoqi@0 | 1516 | {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, |
aoqi@0 | 1517 | {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, |
aoqi@0 | 1518 | {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, |
aoqi@0 | 1519 | {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, |
aoqi@0 | 1520 | {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, |
aoqi@0 | 1521 | {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM"}, |
aoqi@0 | 1522 | {EM_S390, EM_S390, ELFCLASSNONE, ELFDATA2MSB, (char*)"IBM System/390"}, |
aoqi@0 | 1523 | {EM_ALPHA, EM_ALPHA, ELFCLASS64, ELFDATA2LSB, (char*)"Alpha"}, |
aoqi@0 | 1524 | {EM_MIPS_RS3_LE, EM_MIPS_RS3_LE, ELFCLASS32, ELFDATA2LSB, (char*)"MIPSel"}, |
aoqi@0 | 1525 | {EM_MIPS, EM_MIPS, ELFCLASS32, ELFDATA2MSB, (char*)"MIPS"}, |
aoqi@0 | 1526 | {EM_PARISC, EM_PARISC, ELFCLASS32, ELFDATA2MSB, (char*)"PARISC"}, |
aoqi@0 | 1527 | {EM_68K, EM_68K, ELFCLASS32, ELFDATA2MSB, (char*)"M68k"} |
aoqi@0 | 1528 | }; |
aoqi@0 | 1529 | |
aoqi@0 | 1530 | #if (defined IA32) |
aoqi@0 | 1531 | static Elf32_Half running_arch_code=EM_386; |
aoqi@0 | 1532 | #elif (defined AMD64) |
aoqi@0 | 1533 | static Elf32_Half running_arch_code=EM_X86_64; |
aoqi@0 | 1534 | #elif (defined IA64) |
aoqi@0 | 1535 | static Elf32_Half running_arch_code=EM_IA_64; |
aoqi@0 | 1536 | #elif (defined __sparc) && (defined _LP64) |
aoqi@0 | 1537 | static Elf32_Half running_arch_code=EM_SPARCV9; |
aoqi@0 | 1538 | #elif (defined __sparc) && (!defined _LP64) |
aoqi@0 | 1539 | static Elf32_Half running_arch_code=EM_SPARC; |
aoqi@0 | 1540 | #elif (defined __powerpc64__) |
aoqi@0 | 1541 | static Elf32_Half running_arch_code=EM_PPC64; |
aoqi@0 | 1542 | #elif (defined __powerpc__) |
aoqi@0 | 1543 | static Elf32_Half running_arch_code=EM_PPC; |
aoqi@0 | 1544 | #elif (defined ARM) |
aoqi@0 | 1545 | static Elf32_Half running_arch_code=EM_ARM; |
aoqi@0 | 1546 | #elif (defined S390) |
aoqi@0 | 1547 | static Elf32_Half running_arch_code=EM_S390; |
aoqi@0 | 1548 | #elif (defined ALPHA) |
aoqi@0 | 1549 | static Elf32_Half running_arch_code=EM_ALPHA; |
aoqi@0 | 1550 | #elif (defined MIPSEL) |
aoqi@0 | 1551 | static Elf32_Half running_arch_code=EM_MIPS_RS3_LE; |
aoqi@0 | 1552 | #elif (defined PARISC) |
aoqi@0 | 1553 | static Elf32_Half running_arch_code=EM_PARISC; |
aoqi@0 | 1554 | #elif (defined MIPS) |
aoqi@0 | 1555 | static Elf32_Half running_arch_code=EM_MIPS; |
aoqi@0 | 1556 | #elif (defined M68K) |
aoqi@0 | 1557 | static Elf32_Half running_arch_code=EM_68K; |
aoqi@0 | 1558 | #else |
aoqi@0 | 1559 | #error Method os::dll_load requires that one of following is defined:\ |
aoqi@0 | 1560 | IA32, AMD64, IA64, __sparc, __powerpc__, ARM, S390, ALPHA, MIPS, MIPSEL, PARISC, M68K |
aoqi@0 | 1561 | #endif |
aoqi@0 | 1562 | |
aoqi@0 | 1563 | // Identify compatability class for VM's architecture and library's architecture |
aoqi@0 | 1564 | // Obtain string descriptions for architectures |
aoqi@0 | 1565 | |
aoqi@0 | 1566 | arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; |
aoqi@0 | 1567 | int running_arch_index=-1; |
aoqi@0 | 1568 | |
aoqi@0 | 1569 | for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { |
aoqi@0 | 1570 | if (running_arch_code == arch_array[i].code) { |
aoqi@0 | 1571 | running_arch_index = i; |
aoqi@0 | 1572 | } |
aoqi@0 | 1573 | if (lib_arch.code == arch_array[i].code) { |
aoqi@0 | 1574 | lib_arch.compat_class = arch_array[i].compat_class; |
aoqi@0 | 1575 | lib_arch.name = arch_array[i].name; |
aoqi@0 | 1576 | } |
aoqi@0 | 1577 | } |
aoqi@0 | 1578 | |
aoqi@0 | 1579 | assert(running_arch_index != -1, |
aoqi@0 | 1580 | "Didn't find running architecture code (running_arch_code) in arch_array"); |
aoqi@0 | 1581 | if (running_arch_index == -1) { |
aoqi@0 | 1582 | // Even though running architecture detection failed |
aoqi@0 | 1583 | // we may still continue with reporting dlerror() message |
aoqi@0 | 1584 | return NULL; |
aoqi@0 | 1585 | } |
aoqi@0 | 1586 | |
aoqi@0 | 1587 | if (lib_arch.endianess != arch_array[running_arch_index].endianess) { |
aoqi@0 | 1588 | ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); |
aoqi@0 | 1589 | return NULL; |
aoqi@0 | 1590 | } |
aoqi@0 | 1591 | |
aoqi@0 | 1592 | #ifndef S390 |
aoqi@0 | 1593 | if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { |
aoqi@0 | 1594 | ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); |
aoqi@0 | 1595 | return NULL; |
aoqi@0 | 1596 | } |
aoqi@0 | 1597 | #endif // !S390 |
aoqi@0 | 1598 | |
aoqi@0 | 1599 | if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { |
aoqi@0 | 1600 | if ( lib_arch.name!=NULL ) { |
aoqi@0 | 1601 | ::snprintf(diag_msg_buf, diag_msg_max_length-1, |
aoqi@0 | 1602 | " (Possible cause: can't load %s-bit .so on a %s-bit platform)", |
aoqi@0 | 1603 | lib_arch.name, arch_array[running_arch_index].name); |
aoqi@0 | 1604 | } else { |
aoqi@0 | 1605 | ::snprintf(diag_msg_buf, diag_msg_max_length-1, |
aoqi@0 | 1606 | " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", |
aoqi@0 | 1607 | lib_arch.code, |
aoqi@0 | 1608 | arch_array[running_arch_index].name); |
aoqi@0 | 1609 | } |
aoqi@0 | 1610 | } |
aoqi@0 | 1611 | |
aoqi@0 | 1612 | return NULL; |
aoqi@0 | 1613 | } |
aoqi@0 | 1614 | #endif /* !__APPLE__ */ |
aoqi@0 | 1615 | |
aoqi@0 | 1616 | void* os::get_default_process_handle() { |
aoqi@0 | 1617 | #ifdef __APPLE__ |
aoqi@0 | 1618 | // MacOS X needs to use RTLD_FIRST instead of RTLD_LAZY |
aoqi@0 | 1619 | // to avoid finding unexpected symbols on second (or later) |
aoqi@0 | 1620 | // loads of a library. |
aoqi@0 | 1621 | return (void*)::dlopen(NULL, RTLD_FIRST); |
aoqi@0 | 1622 | #else |
aoqi@0 | 1623 | return (void*)::dlopen(NULL, RTLD_LAZY); |
aoqi@0 | 1624 | #endif |
aoqi@0 | 1625 | } |
aoqi@0 | 1626 | |
aoqi@0 | 1627 | // XXX: Do we need a lock around this as per Linux? |
aoqi@0 | 1628 | void* os::dll_lookup(void* handle, const char* name) { |
aoqi@0 | 1629 | return dlsym(handle, name); |
aoqi@0 | 1630 | } |
aoqi@0 | 1631 | |
aoqi@0 | 1632 | |
aoqi@0 | 1633 | static bool _print_ascii_file(const char* filename, outputStream* st) { |
aoqi@0 | 1634 | int fd = ::open(filename, O_RDONLY); |
aoqi@0 | 1635 | if (fd == -1) { |
aoqi@0 | 1636 | return false; |
aoqi@0 | 1637 | } |
aoqi@0 | 1638 | |
aoqi@0 | 1639 | char buf[32]; |
aoqi@0 | 1640 | int bytes; |
aoqi@0 | 1641 | while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { |
aoqi@0 | 1642 | st->print_raw(buf, bytes); |
aoqi@0 | 1643 | } |
aoqi@0 | 1644 | |
aoqi@0 | 1645 | ::close(fd); |
aoqi@0 | 1646 | |
aoqi@0 | 1647 | return true; |
aoqi@0 | 1648 | } |
aoqi@0 | 1649 | |
aoqi@0 | 1650 | void os::print_dll_info(outputStream *st) { |
aoqi@0 | 1651 | st->print_cr("Dynamic libraries:"); |
aoqi@0 | 1652 | #ifdef RTLD_DI_LINKMAP |
aoqi@0 | 1653 | Dl_info dli; |
aoqi@0 | 1654 | void *handle; |
aoqi@0 | 1655 | Link_map *map; |
aoqi@0 | 1656 | Link_map *p; |
aoqi@0 | 1657 | |
aoqi@0 | 1658 | if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 || |
aoqi@0 | 1659 | dli.dli_fname == NULL) { |
aoqi@0 | 1660 | st->print_cr("Error: Cannot print dynamic libraries."); |
aoqi@0 | 1661 | return; |
aoqi@0 | 1662 | } |
aoqi@0 | 1663 | handle = dlopen(dli.dli_fname, RTLD_LAZY); |
aoqi@0 | 1664 | if (handle == NULL) { |
aoqi@0 | 1665 | st->print_cr("Error: Cannot print dynamic libraries."); |
aoqi@0 | 1666 | return; |
aoqi@0 | 1667 | } |
aoqi@0 | 1668 | dlinfo(handle, RTLD_DI_LINKMAP, &map); |
aoqi@0 | 1669 | if (map == NULL) { |
aoqi@0 | 1670 | st->print_cr("Error: Cannot print dynamic libraries."); |
aoqi@0 | 1671 | return; |
aoqi@0 | 1672 | } |
aoqi@0 | 1673 | |
aoqi@0 | 1674 | while (map->l_prev != NULL) |
aoqi@0 | 1675 | map = map->l_prev; |
aoqi@0 | 1676 | |
aoqi@0 | 1677 | while (map != NULL) { |
aoqi@0 | 1678 | st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); |
aoqi@0 | 1679 | map = map->l_next; |
aoqi@0 | 1680 | } |
aoqi@0 | 1681 | |
aoqi@0 | 1682 | dlclose(handle); |
aoqi@0 | 1683 | #elif defined(__APPLE__) |
aoqi@0 | 1684 | uint32_t count; |
aoqi@0 | 1685 | uint32_t i; |
aoqi@0 | 1686 | |
aoqi@0 | 1687 | count = _dyld_image_count(); |
aoqi@0 | 1688 | for (i = 1; i < count; i++) { |
aoqi@0 | 1689 | const char *name = _dyld_get_image_name(i); |
aoqi@0 | 1690 | intptr_t slide = _dyld_get_image_vmaddr_slide(i); |
aoqi@0 | 1691 | st->print_cr(PTR_FORMAT " \t%s", slide, name); |
aoqi@0 | 1692 | } |
aoqi@0 | 1693 | #else |
aoqi@0 | 1694 | st->print_cr("Error: Cannot print dynamic libraries."); |
aoqi@0 | 1695 | #endif |
aoqi@0 | 1696 | } |
aoqi@0 | 1697 | |
aoqi@0 | 1698 | void os::print_os_info_brief(outputStream* st) { |
aoqi@0 | 1699 | st->print("Bsd"); |
aoqi@0 | 1700 | |
aoqi@0 | 1701 | os::Posix::print_uname_info(st); |
aoqi@0 | 1702 | } |
aoqi@0 | 1703 | |
aoqi@0 | 1704 | void os::print_os_info(outputStream* st) { |
aoqi@0 | 1705 | st->print("OS:"); |
aoqi@0 | 1706 | st->print("Bsd"); |
aoqi@0 | 1707 | |
aoqi@0 | 1708 | os::Posix::print_uname_info(st); |
aoqi@0 | 1709 | |
aoqi@0 | 1710 | os::Posix::print_rlimit_info(st); |
aoqi@0 | 1711 | |
aoqi@0 | 1712 | os::Posix::print_load_average(st); |
aoqi@0 | 1713 | } |
aoqi@0 | 1714 | |
aoqi@0 | 1715 | void os::pd_print_cpu_info(outputStream* st) { |
aoqi@0 | 1716 | // Nothing to do for now. |
aoqi@0 | 1717 | } |
aoqi@0 | 1718 | |
aoqi@0 | 1719 | void os::print_memory_info(outputStream* st) { |
aoqi@0 | 1720 | |
aoqi@0 | 1721 | st->print("Memory:"); |
aoqi@0 | 1722 | st->print(" %dk page", os::vm_page_size()>>10); |
aoqi@0 | 1723 | |
aoqi@0 | 1724 | st->print(", physical " UINT64_FORMAT "k", |
aoqi@0 | 1725 | os::physical_memory() >> 10); |
aoqi@0 | 1726 | st->print("(" UINT64_FORMAT "k free)", |
aoqi@0 | 1727 | os::available_memory() >> 10); |
aoqi@0 | 1728 | st->cr(); |
aoqi@0 | 1729 | |
aoqi@0 | 1730 | // meminfo |
aoqi@0 | 1731 | st->print("\n/proc/meminfo:\n"); |
aoqi@0 | 1732 | _print_ascii_file("/proc/meminfo", st); |
aoqi@0 | 1733 | st->cr(); |
aoqi@0 | 1734 | } |
aoqi@0 | 1735 | |
aoqi@0 | 1736 | void os::print_siginfo(outputStream* st, void* siginfo) { |
aoqi@0 | 1737 | const siginfo_t* si = (const siginfo_t*)siginfo; |
aoqi@0 | 1738 | |
aoqi@0 | 1739 | os::Posix::print_siginfo_brief(st, si); |
aoqi@0 | 1740 | |
aoqi@0 | 1741 | if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && |
aoqi@0 | 1742 | UseSharedSpaces) { |
aoqi@0 | 1743 | FileMapInfo* mapinfo = FileMapInfo::current_info(); |
aoqi@0 | 1744 | if (mapinfo->is_in_shared_space(si->si_addr)) { |
aoqi@0 | 1745 | st->print("\n\nError accessing class data sharing archive." \ |
aoqi@0 | 1746 | " Mapped file inaccessible during execution, " \ |
aoqi@0 | 1747 | " possible disk/network problem."); |
aoqi@0 | 1748 | } |
aoqi@0 | 1749 | } |
aoqi@0 | 1750 | st->cr(); |
aoqi@0 | 1751 | } |
aoqi@0 | 1752 | |
aoqi@0 | 1753 | |
aoqi@0 | 1754 | static void print_signal_handler(outputStream* st, int sig, |
aoqi@0 | 1755 | char* buf, size_t buflen); |
aoqi@0 | 1756 | |
aoqi@0 | 1757 | void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { |
aoqi@0 | 1758 | st->print_cr("Signal Handlers:"); |
aoqi@0 | 1759 | print_signal_handler(st, SIGSEGV, buf, buflen); |
aoqi@0 | 1760 | print_signal_handler(st, SIGBUS , buf, buflen); |
aoqi@0 | 1761 | print_signal_handler(st, SIGFPE , buf, buflen); |
aoqi@0 | 1762 | print_signal_handler(st, SIGPIPE, buf, buflen); |
aoqi@0 | 1763 | print_signal_handler(st, SIGXFSZ, buf, buflen); |
aoqi@0 | 1764 | print_signal_handler(st, SIGILL , buf, buflen); |
aoqi@0 | 1765 | print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); |
aoqi@0 | 1766 | print_signal_handler(st, SR_signum, buf, buflen); |
aoqi@0 | 1767 | print_signal_handler(st, SHUTDOWN1_SIGNAL, buf, buflen); |
aoqi@0 | 1768 | print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); |
aoqi@0 | 1769 | print_signal_handler(st, SHUTDOWN3_SIGNAL , buf, buflen); |
aoqi@0 | 1770 | print_signal_handler(st, BREAK_SIGNAL, buf, buflen); |
aoqi@0 | 1771 | } |
aoqi@0 | 1772 | |
aoqi@0 | 1773 | static char saved_jvm_path[MAXPATHLEN] = {0}; |
aoqi@0 | 1774 | |
aoqi@0 | 1775 | // Find the full path to the current module, libjvm |
aoqi@0 | 1776 | void os::jvm_path(char *buf, jint buflen) { |
aoqi@0 | 1777 | // Error checking. |
aoqi@0 | 1778 | if (buflen < MAXPATHLEN) { |
aoqi@0 | 1779 | assert(false, "must use a large-enough buffer"); |
aoqi@0 | 1780 | buf[0] = '\0'; |
aoqi@0 | 1781 | return; |
aoqi@0 | 1782 | } |
aoqi@0 | 1783 | // Lazy resolve the path to current module. |
aoqi@0 | 1784 | if (saved_jvm_path[0] != 0) { |
aoqi@0 | 1785 | strcpy(buf, saved_jvm_path); |
aoqi@0 | 1786 | return; |
aoqi@0 | 1787 | } |
aoqi@0 | 1788 | |
aoqi@0 | 1789 | char dli_fname[MAXPATHLEN]; |
aoqi@0 | 1790 | bool ret = dll_address_to_library_name( |
aoqi@0 | 1791 | CAST_FROM_FN_PTR(address, os::jvm_path), |
aoqi@0 | 1792 | dli_fname, sizeof(dli_fname), NULL); |
aoqi@0 | 1793 | assert(ret, "cannot locate libjvm"); |
aoqi@0 | 1794 | char *rp = NULL; |
aoqi@0 | 1795 | if (ret && dli_fname[0] != '\0') { |
aoqi@0 | 1796 | rp = realpath(dli_fname, buf); |
aoqi@0 | 1797 | } |
aoqi@0 | 1798 | if (rp == NULL) |
aoqi@0 | 1799 | return; |
aoqi@0 | 1800 | |
aoqi@0 | 1801 | if (Arguments::created_by_gamma_launcher()) { |
aoqi@0 | 1802 | // Support for the gamma launcher. Typical value for buf is |
aoqi@0 | 1803 | // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm". If "/jre/lib/" appears at |
aoqi@0 | 1804 | // the right place in the string, then assume we are installed in a JDK and |
aoqi@0 | 1805 | // we're done. Otherwise, check for a JAVA_HOME environment variable and |
aoqi@0 | 1806 | // construct a path to the JVM being overridden. |
aoqi@0 | 1807 | |
aoqi@0 | 1808 | const char *p = buf + strlen(buf) - 1; |
aoqi@0 | 1809 | for (int count = 0; p > buf && count < 5; ++count) { |
aoqi@0 | 1810 | for (--p; p > buf && *p != '/'; --p) |
aoqi@0 | 1811 | /* empty */ ; |
aoqi@0 | 1812 | } |
aoqi@0 | 1813 | |
aoqi@0 | 1814 | if (strncmp(p, "/jre/lib/", 9) != 0) { |
aoqi@0 | 1815 | // Look for JAVA_HOME in the environment. |
aoqi@0 | 1816 | char* java_home_var = ::getenv("JAVA_HOME"); |
aoqi@0 | 1817 | if (java_home_var != NULL && java_home_var[0] != 0) { |
aoqi@0 | 1818 | char* jrelib_p; |
aoqi@0 | 1819 | int len; |
aoqi@0 | 1820 | |
aoqi@0 | 1821 | // Check the current module name "libjvm" |
aoqi@0 | 1822 | p = strrchr(buf, '/'); |
aoqi@0 | 1823 | assert(strstr(p, "/libjvm") == p, "invalid library name"); |
aoqi@0 | 1824 | |
aoqi@0 | 1825 | rp = realpath(java_home_var, buf); |
aoqi@0 | 1826 | if (rp == NULL) |
aoqi@0 | 1827 | return; |
aoqi@0 | 1828 | |
aoqi@0 | 1829 | // determine if this is a legacy image or modules image |
aoqi@0 | 1830 | // modules image doesn't have "jre" subdirectory |
aoqi@0 | 1831 | len = strlen(buf); |
aoqi@0 | 1832 | assert(len < buflen, "Ran out of buffer space"); |
aoqi@0 | 1833 | jrelib_p = buf + len; |
aoqi@0 | 1834 | |
aoqi@0 | 1835 | // Add the appropriate library subdir |
aoqi@0 | 1836 | snprintf(jrelib_p, buflen-len, "/jre/lib"); |
aoqi@0 | 1837 | if (0 != access(buf, F_OK)) { |
aoqi@0 | 1838 | snprintf(jrelib_p, buflen-len, "/lib"); |
aoqi@0 | 1839 | } |
aoqi@0 | 1840 | |
aoqi@0 | 1841 | // Add the appropriate client or server subdir |
aoqi@0 | 1842 | len = strlen(buf); |
aoqi@0 | 1843 | jrelib_p = buf + len; |
aoqi@0 | 1844 | snprintf(jrelib_p, buflen-len, "/%s", COMPILER_VARIANT); |
aoqi@0 | 1845 | if (0 != access(buf, F_OK)) { |
aoqi@0 | 1846 | snprintf(jrelib_p, buflen-len, ""); |
aoqi@0 | 1847 | } |
aoqi@0 | 1848 | |
aoqi@0 | 1849 | // If the path exists within JAVA_HOME, add the JVM library name |
aoqi@0 | 1850 | // to complete the path to JVM being overridden. Otherwise fallback |
aoqi@0 | 1851 | // to the path to the current library. |
aoqi@0 | 1852 | if (0 == access(buf, F_OK)) { |
aoqi@0 | 1853 | // Use current module name "libjvm" |
aoqi@0 | 1854 | len = strlen(buf); |
aoqi@0 | 1855 | snprintf(buf + len, buflen-len, "/libjvm%s", JNI_LIB_SUFFIX); |
aoqi@0 | 1856 | } else { |
aoqi@0 | 1857 | // Fall back to path of current library |
aoqi@0 | 1858 | rp = realpath(dli_fname, buf); |
aoqi@0 | 1859 | if (rp == NULL) |
aoqi@0 | 1860 | return; |
aoqi@0 | 1861 | } |
aoqi@0 | 1862 | } |
aoqi@0 | 1863 | } |
aoqi@0 | 1864 | } |
aoqi@0 | 1865 | |
aoqi@0 | 1866 | strncpy(saved_jvm_path, buf, MAXPATHLEN); |
aoqi@0 | 1867 | } |
aoqi@0 | 1868 | |
aoqi@0 | 1869 | void os::print_jni_name_prefix_on(outputStream* st, int args_size) { |
aoqi@0 | 1870 | // no prefix required, not even "_" |
aoqi@0 | 1871 | } |
aoqi@0 | 1872 | |
aoqi@0 | 1873 | void os::print_jni_name_suffix_on(outputStream* st, int args_size) { |
aoqi@0 | 1874 | // no suffix required |
aoqi@0 | 1875 | } |
aoqi@0 | 1876 | |
aoqi@0 | 1877 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 1878 | // sun.misc.Signal support |
aoqi@0 | 1879 | |
aoqi@0 | 1880 | static volatile jint sigint_count = 0; |
aoqi@0 | 1881 | |
aoqi@0 | 1882 | static void |
aoqi@0 | 1883 | UserHandler(int sig, void *siginfo, void *context) { |
aoqi@0 | 1884 | // 4511530 - sem_post is serialized and handled by the manager thread. When |
aoqi@0 | 1885 | // the program is interrupted by Ctrl-C, SIGINT is sent to every thread. We |
aoqi@0 | 1886 | // don't want to flood the manager thread with sem_post requests. |
aoqi@0 | 1887 | if (sig == SIGINT && Atomic::add(1, &sigint_count) > 1) |
aoqi@0 | 1888 | return; |
aoqi@0 | 1889 | |
aoqi@0 | 1890 | // Ctrl-C is pressed during error reporting, likely because the error |
aoqi@0 | 1891 | // handler fails to abort. Let VM die immediately. |
aoqi@0 | 1892 | if (sig == SIGINT && is_error_reported()) { |
aoqi@0 | 1893 | os::die(); |
aoqi@0 | 1894 | } |
aoqi@0 | 1895 | |
aoqi@0 | 1896 | os::signal_notify(sig); |
aoqi@0 | 1897 | } |
aoqi@0 | 1898 | |
aoqi@0 | 1899 | void* os::user_handler() { |
aoqi@0 | 1900 | return CAST_FROM_FN_PTR(void*, UserHandler); |
aoqi@0 | 1901 | } |
aoqi@0 | 1902 | |
aoqi@0 | 1903 | extern "C" { |
aoqi@0 | 1904 | typedef void (*sa_handler_t)(int); |
aoqi@0 | 1905 | typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); |
aoqi@0 | 1906 | } |
aoqi@0 | 1907 | |
aoqi@0 | 1908 | void* os::signal(int signal_number, void* handler) { |
aoqi@0 | 1909 | struct sigaction sigAct, oldSigAct; |
aoqi@0 | 1910 | |
aoqi@0 | 1911 | sigfillset(&(sigAct.sa_mask)); |
aoqi@0 | 1912 | sigAct.sa_flags = SA_RESTART|SA_SIGINFO; |
aoqi@0 | 1913 | sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); |
aoqi@0 | 1914 | |
aoqi@0 | 1915 | if (sigaction(signal_number, &sigAct, &oldSigAct)) { |
aoqi@0 | 1916 | // -1 means registration failed |
aoqi@0 | 1917 | return (void *)-1; |
aoqi@0 | 1918 | } |
aoqi@0 | 1919 | |
aoqi@0 | 1920 | return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); |
aoqi@0 | 1921 | } |
aoqi@0 | 1922 | |
aoqi@0 | 1923 | void os::signal_raise(int signal_number) { |
aoqi@0 | 1924 | ::raise(signal_number); |
aoqi@0 | 1925 | } |
aoqi@0 | 1926 | |
aoqi@0 | 1927 | /* |
aoqi@0 | 1928 | * The following code is moved from os.cpp for making this |
aoqi@0 | 1929 | * code platform specific, which it is by its very nature. |
aoqi@0 | 1930 | */ |
aoqi@0 | 1931 | |
aoqi@0 | 1932 | // Will be modified when max signal is changed to be dynamic |
aoqi@0 | 1933 | int os::sigexitnum_pd() { |
aoqi@0 | 1934 | return NSIG; |
aoqi@0 | 1935 | } |
aoqi@0 | 1936 | |
aoqi@0 | 1937 | // a counter for each possible signal value |
aoqi@0 | 1938 | static volatile jint pending_signals[NSIG+1] = { 0 }; |
aoqi@0 | 1939 | |
aoqi@0 | 1940 | // Bsd(POSIX) specific hand shaking semaphore. |
aoqi@0 | 1941 | #ifdef __APPLE__ |
aoqi@0 | 1942 | typedef semaphore_t os_semaphore_t; |
aoqi@0 | 1943 | #define SEM_INIT(sem, value) semaphore_create(mach_task_self(), &sem, SYNC_POLICY_FIFO, value) |
aoqi@0 | 1944 | #define SEM_WAIT(sem) semaphore_wait(sem) |
aoqi@0 | 1945 | #define SEM_POST(sem) semaphore_signal(sem) |
aoqi@0 | 1946 | #define SEM_DESTROY(sem) semaphore_destroy(mach_task_self(), sem) |
aoqi@0 | 1947 | #else |
aoqi@0 | 1948 | typedef sem_t os_semaphore_t; |
aoqi@0 | 1949 | #define SEM_INIT(sem, value) sem_init(&sem, 0, value) |
aoqi@0 | 1950 | #define SEM_WAIT(sem) sem_wait(&sem) |
aoqi@0 | 1951 | #define SEM_POST(sem) sem_post(&sem) |
aoqi@0 | 1952 | #define SEM_DESTROY(sem) sem_destroy(&sem) |
aoqi@0 | 1953 | #endif |
aoqi@0 | 1954 | |
aoqi@0 | 1955 | class Semaphore : public StackObj { |
aoqi@0 | 1956 | public: |
aoqi@0 | 1957 | Semaphore(); |
aoqi@0 | 1958 | ~Semaphore(); |
aoqi@0 | 1959 | void signal(); |
aoqi@0 | 1960 | void wait(); |
aoqi@0 | 1961 | bool trywait(); |
aoqi@0 | 1962 | bool timedwait(unsigned int sec, int nsec); |
aoqi@0 | 1963 | private: |
aoqi@0 | 1964 | jlong currenttime() const; |
aoqi@0 | 1965 | os_semaphore_t _semaphore; |
aoqi@0 | 1966 | }; |
aoqi@0 | 1967 | |
aoqi@0 | 1968 | Semaphore::Semaphore() : _semaphore(0) { |
aoqi@0 | 1969 | SEM_INIT(_semaphore, 0); |
aoqi@0 | 1970 | } |
aoqi@0 | 1971 | |
aoqi@0 | 1972 | Semaphore::~Semaphore() { |
aoqi@0 | 1973 | SEM_DESTROY(_semaphore); |
aoqi@0 | 1974 | } |
aoqi@0 | 1975 | |
aoqi@0 | 1976 | void Semaphore::signal() { |
aoqi@0 | 1977 | SEM_POST(_semaphore); |
aoqi@0 | 1978 | } |
aoqi@0 | 1979 | |
aoqi@0 | 1980 | void Semaphore::wait() { |
aoqi@0 | 1981 | SEM_WAIT(_semaphore); |
aoqi@0 | 1982 | } |
aoqi@0 | 1983 | |
aoqi@0 | 1984 | jlong Semaphore::currenttime() const { |
aoqi@0 | 1985 | struct timeval tv; |
aoqi@0 | 1986 | gettimeofday(&tv, NULL); |
aoqi@0 | 1987 | return (tv.tv_sec * NANOSECS_PER_SEC) + (tv.tv_usec * 1000); |
aoqi@0 | 1988 | } |
aoqi@0 | 1989 | |
aoqi@0 | 1990 | #ifdef __APPLE__ |
aoqi@0 | 1991 | bool Semaphore::trywait() { |
aoqi@0 | 1992 | return timedwait(0, 0); |
aoqi@0 | 1993 | } |
aoqi@0 | 1994 | |
aoqi@0 | 1995 | bool Semaphore::timedwait(unsigned int sec, int nsec) { |
aoqi@0 | 1996 | kern_return_t kr = KERN_ABORTED; |
aoqi@0 | 1997 | mach_timespec_t waitspec; |
aoqi@0 | 1998 | waitspec.tv_sec = sec; |
aoqi@0 | 1999 | waitspec.tv_nsec = nsec; |
aoqi@0 | 2000 | |
aoqi@0 | 2001 | jlong starttime = currenttime(); |
aoqi@0 | 2002 | |
aoqi@0 | 2003 | kr = semaphore_timedwait(_semaphore, waitspec); |
aoqi@0 | 2004 | while (kr == KERN_ABORTED) { |
aoqi@0 | 2005 | jlong totalwait = (sec * NANOSECS_PER_SEC) + nsec; |
aoqi@0 | 2006 | |
aoqi@0 | 2007 | jlong current = currenttime(); |
aoqi@0 | 2008 | jlong passedtime = current - starttime; |
aoqi@0 | 2009 | |
aoqi@0 | 2010 | if (passedtime >= totalwait) { |
aoqi@0 | 2011 | waitspec.tv_sec = 0; |
aoqi@0 | 2012 | waitspec.tv_nsec = 0; |
aoqi@0 | 2013 | } else { |
aoqi@0 | 2014 | jlong waittime = totalwait - (current - starttime); |
aoqi@0 | 2015 | waitspec.tv_sec = waittime / NANOSECS_PER_SEC; |
aoqi@0 | 2016 | waitspec.tv_nsec = waittime % NANOSECS_PER_SEC; |
aoqi@0 | 2017 | } |
aoqi@0 | 2018 | |
aoqi@0 | 2019 | kr = semaphore_timedwait(_semaphore, waitspec); |
aoqi@0 | 2020 | } |
aoqi@0 | 2021 | |
aoqi@0 | 2022 | return kr == KERN_SUCCESS; |
aoqi@0 | 2023 | } |
aoqi@0 | 2024 | |
aoqi@0 | 2025 | #else |
aoqi@0 | 2026 | |
aoqi@0 | 2027 | bool Semaphore::trywait() { |
aoqi@0 | 2028 | return sem_trywait(&_semaphore) == 0; |
aoqi@0 | 2029 | } |
aoqi@0 | 2030 | |
aoqi@0 | 2031 | bool Semaphore::timedwait(unsigned int sec, int nsec) { |
aoqi@0 | 2032 | struct timespec ts; |
aoqi@0 | 2033 | unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); |
aoqi@0 | 2034 | |
aoqi@0 | 2035 | while (1) { |
aoqi@0 | 2036 | int result = sem_timedwait(&_semaphore, &ts); |
aoqi@0 | 2037 | if (result == 0) { |
aoqi@0 | 2038 | return true; |
aoqi@0 | 2039 | } else if (errno == EINTR) { |
aoqi@0 | 2040 | continue; |
aoqi@0 | 2041 | } else if (errno == ETIMEDOUT) { |
aoqi@0 | 2042 | return false; |
aoqi@0 | 2043 | } else { |
aoqi@0 | 2044 | return false; |
aoqi@0 | 2045 | } |
aoqi@0 | 2046 | } |
aoqi@0 | 2047 | } |
aoqi@0 | 2048 | |
aoqi@0 | 2049 | #endif // __APPLE__ |
aoqi@0 | 2050 | |
aoqi@0 | 2051 | static os_semaphore_t sig_sem; |
aoqi@0 | 2052 | static Semaphore sr_semaphore; |
aoqi@0 | 2053 | |
aoqi@0 | 2054 | void os::signal_init_pd() { |
aoqi@0 | 2055 | // Initialize signal structures |
aoqi@0 | 2056 | ::memset((void*)pending_signals, 0, sizeof(pending_signals)); |
aoqi@0 | 2057 | |
aoqi@0 | 2058 | // Initialize signal semaphore |
aoqi@0 | 2059 | ::SEM_INIT(sig_sem, 0); |
aoqi@0 | 2060 | } |
aoqi@0 | 2061 | |
aoqi@0 | 2062 | void os::signal_notify(int sig) { |
aoqi@0 | 2063 | Atomic::inc(&pending_signals[sig]); |
aoqi@0 | 2064 | ::SEM_POST(sig_sem); |
aoqi@0 | 2065 | } |
aoqi@0 | 2066 | |
aoqi@0 | 2067 | static int check_pending_signals(bool wait) { |
aoqi@0 | 2068 | Atomic::store(0, &sigint_count); |
aoqi@0 | 2069 | for (;;) { |
aoqi@0 | 2070 | for (int i = 0; i < NSIG + 1; i++) { |
aoqi@0 | 2071 | jint n = pending_signals[i]; |
aoqi@0 | 2072 | if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { |
aoqi@0 | 2073 | return i; |
aoqi@0 | 2074 | } |
aoqi@0 | 2075 | } |
aoqi@0 | 2076 | if (!wait) { |
aoqi@0 | 2077 | return -1; |
aoqi@0 | 2078 | } |
aoqi@0 | 2079 | JavaThread *thread = JavaThread::current(); |
aoqi@0 | 2080 | ThreadBlockInVM tbivm(thread); |
aoqi@0 | 2081 | |
aoqi@0 | 2082 | bool threadIsSuspended; |
aoqi@0 | 2083 | do { |
aoqi@0 | 2084 | thread->set_suspend_equivalent(); |
aoqi@0 | 2085 | // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
aoqi@0 | 2086 | ::SEM_WAIT(sig_sem); |
aoqi@0 | 2087 | |
aoqi@0 | 2088 | // were we externally suspended while we were waiting? |
aoqi@0 | 2089 | threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); |
aoqi@0 | 2090 | if (threadIsSuspended) { |
aoqi@0 | 2091 | // |
aoqi@0 | 2092 | // The semaphore has been incremented, but while we were waiting |
aoqi@0 | 2093 | // another thread suspended us. We don't want to continue running |
aoqi@0 | 2094 | // while suspended because that would surprise the thread that |
aoqi@0 | 2095 | // suspended us. |
aoqi@0 | 2096 | // |
aoqi@0 | 2097 | ::SEM_POST(sig_sem); |
aoqi@0 | 2098 | |
aoqi@0 | 2099 | thread->java_suspend_self(); |
aoqi@0 | 2100 | } |
aoqi@0 | 2101 | } while (threadIsSuspended); |
aoqi@0 | 2102 | } |
aoqi@0 | 2103 | } |
aoqi@0 | 2104 | |
aoqi@0 | 2105 | int os::signal_lookup() { |
aoqi@0 | 2106 | return check_pending_signals(false); |
aoqi@0 | 2107 | } |
aoqi@0 | 2108 | |
aoqi@0 | 2109 | int os::signal_wait() { |
aoqi@0 | 2110 | return check_pending_signals(true); |
aoqi@0 | 2111 | } |
aoqi@0 | 2112 | |
aoqi@0 | 2113 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 2114 | // Virtual Memory |
aoqi@0 | 2115 | |
aoqi@0 | 2116 | int os::vm_page_size() { |
aoqi@0 | 2117 | // Seems redundant as all get out |
aoqi@0 | 2118 | assert(os::Bsd::page_size() != -1, "must call os::init"); |
aoqi@0 | 2119 | return os::Bsd::page_size(); |
aoqi@0 | 2120 | } |
aoqi@0 | 2121 | |
aoqi@0 | 2122 | // Solaris allocates memory by pages. |
aoqi@0 | 2123 | int os::vm_allocation_granularity() { |
aoqi@0 | 2124 | assert(os::Bsd::page_size() != -1, "must call os::init"); |
aoqi@0 | 2125 | return os::Bsd::page_size(); |
aoqi@0 | 2126 | } |
aoqi@0 | 2127 | |
aoqi@0 | 2128 | // Rationale behind this function: |
aoqi@0 | 2129 | // current (Mon Apr 25 20:12:18 MSD 2005) oprofile drops samples without executable |
aoqi@0 | 2130 | // mapping for address (see lookup_dcookie() in the kernel module), thus we cannot get |
aoqi@0 | 2131 | // samples for JITted code. Here we create private executable mapping over the code cache |
aoqi@0 | 2132 | // and then we can use standard (well, almost, as mapping can change) way to provide |
aoqi@0 | 2133 | // info for the reporting script by storing timestamp and location of symbol |
aoqi@0 | 2134 | void bsd_wrap_code(char* base, size_t size) { |
aoqi@0 | 2135 | static volatile jint cnt = 0; |
aoqi@0 | 2136 | |
aoqi@0 | 2137 | if (!UseOprofile) { |
aoqi@0 | 2138 | return; |
aoqi@0 | 2139 | } |
aoqi@0 | 2140 | |
aoqi@0 | 2141 | char buf[PATH_MAX + 1]; |
aoqi@0 | 2142 | int num = Atomic::add(1, &cnt); |
aoqi@0 | 2143 | |
aoqi@0 | 2144 | snprintf(buf, PATH_MAX + 1, "%s/hs-vm-%d-%d", |
aoqi@0 | 2145 | os::get_temp_directory(), os::current_process_id(), num); |
aoqi@0 | 2146 | unlink(buf); |
aoqi@0 | 2147 | |
aoqi@0 | 2148 | int fd = ::open(buf, O_CREAT | O_RDWR, S_IRWXU); |
aoqi@0 | 2149 | |
aoqi@0 | 2150 | if (fd != -1) { |
aoqi@0 | 2151 | off_t rv = ::lseek(fd, size-2, SEEK_SET); |
aoqi@0 | 2152 | if (rv != (off_t)-1) { |
aoqi@0 | 2153 | if (::write(fd, "", 1) == 1) { |
aoqi@0 | 2154 | mmap(base, size, |
aoqi@0 | 2155 | PROT_READ|PROT_WRITE|PROT_EXEC, |
aoqi@0 | 2156 | MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, fd, 0); |
aoqi@0 | 2157 | } |
aoqi@0 | 2158 | } |
aoqi@0 | 2159 | ::close(fd); |
aoqi@0 | 2160 | unlink(buf); |
aoqi@0 | 2161 | } |
aoqi@0 | 2162 | } |
aoqi@0 | 2163 | |
aoqi@0 | 2164 | static void warn_fail_commit_memory(char* addr, size_t size, bool exec, |
aoqi@0 | 2165 | int err) { |
aoqi@0 | 2166 | warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT |
aoqi@0 | 2167 | ", %d) failed; error='%s' (errno=%d)", addr, size, exec, |
aoqi@0 | 2168 | strerror(err), err); |
aoqi@0 | 2169 | } |
aoqi@0 | 2170 | |
aoqi@0 | 2171 | // NOTE: Bsd kernel does not really reserve the pages for us. |
aoqi@0 | 2172 | // All it does is to check if there are enough free pages |
aoqi@0 | 2173 | // left at the time of mmap(). This could be a potential |
aoqi@0 | 2174 | // problem. |
aoqi@0 | 2175 | bool os::pd_commit_memory(char* addr, size_t size, bool exec) { |
aoqi@0 | 2176 | int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; |
aoqi@0 | 2177 | #ifdef __OpenBSD__ |
aoqi@0 | 2178 | // XXX: Work-around mmap/MAP_FIXED bug temporarily on OpenBSD |
aoqi@0 | 2179 | if (::mprotect(addr, size, prot) == 0) { |
aoqi@0 | 2180 | return true; |
aoqi@0 | 2181 | } |
aoqi@0 | 2182 | #else |
aoqi@0 | 2183 | uintptr_t res = (uintptr_t) ::mmap(addr, size, prot, |
aoqi@0 | 2184 | MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0); |
aoqi@0 | 2185 | if (res != (uintptr_t) MAP_FAILED) { |
aoqi@0 | 2186 | return true; |
aoqi@0 | 2187 | } |
aoqi@0 | 2188 | #endif |
aoqi@0 | 2189 | |
aoqi@0 | 2190 | // Warn about any commit errors we see in non-product builds just |
aoqi@0 | 2191 | // in case mmap() doesn't work as described on the man page. |
aoqi@0 | 2192 | NOT_PRODUCT(warn_fail_commit_memory(addr, size, exec, errno);) |
aoqi@0 | 2193 | |
aoqi@0 | 2194 | return false; |
aoqi@0 | 2195 | } |
aoqi@0 | 2196 | |
aoqi@0 | 2197 | bool os::pd_commit_memory(char* addr, size_t size, size_t alignment_hint, |
aoqi@0 | 2198 | bool exec) { |
aoqi@0 | 2199 | // alignment_hint is ignored on this OS |
aoqi@0 | 2200 | return pd_commit_memory(addr, size, exec); |
aoqi@0 | 2201 | } |
aoqi@0 | 2202 | |
aoqi@0 | 2203 | void os::pd_commit_memory_or_exit(char* addr, size_t size, bool exec, |
aoqi@0 | 2204 | const char* mesg) { |
aoqi@0 | 2205 | assert(mesg != NULL, "mesg must be specified"); |
aoqi@0 | 2206 | if (!pd_commit_memory(addr, size, exec)) { |
aoqi@0 | 2207 | // add extra info in product mode for vm_exit_out_of_memory(): |
aoqi@0 | 2208 | PRODUCT_ONLY(warn_fail_commit_memory(addr, size, exec, errno);) |
aoqi@0 | 2209 | vm_exit_out_of_memory(size, OOM_MMAP_ERROR, mesg); |
aoqi@0 | 2210 | } |
aoqi@0 | 2211 | } |
aoqi@0 | 2212 | |
aoqi@0 | 2213 | void os::pd_commit_memory_or_exit(char* addr, size_t size, |
aoqi@0 | 2214 | size_t alignment_hint, bool exec, |
aoqi@0 | 2215 | const char* mesg) { |
aoqi@0 | 2216 | // alignment_hint is ignored on this OS |
aoqi@0 | 2217 | pd_commit_memory_or_exit(addr, size, exec, mesg); |
aoqi@0 | 2218 | } |
aoqi@0 | 2219 | |
aoqi@0 | 2220 | void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { |
aoqi@0 | 2221 | } |
aoqi@0 | 2222 | |
aoqi@0 | 2223 | void os::pd_free_memory(char *addr, size_t bytes, size_t alignment_hint) { |
aoqi@0 | 2224 | ::madvise(addr, bytes, MADV_DONTNEED); |
aoqi@0 | 2225 | } |
aoqi@0 | 2226 | |
aoqi@0 | 2227 | void os::numa_make_global(char *addr, size_t bytes) { |
aoqi@0 | 2228 | } |
aoqi@0 | 2229 | |
aoqi@0 | 2230 | void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { |
aoqi@0 | 2231 | } |
aoqi@0 | 2232 | |
aoqi@0 | 2233 | bool os::numa_topology_changed() { return false; } |
aoqi@0 | 2234 | |
aoqi@0 | 2235 | size_t os::numa_get_groups_num() { |
aoqi@0 | 2236 | return 1; |
aoqi@0 | 2237 | } |
aoqi@0 | 2238 | |
aoqi@0 | 2239 | int os::numa_get_group_id() { |
aoqi@0 | 2240 | return 0; |
aoqi@0 | 2241 | } |
aoqi@0 | 2242 | |
aoqi@0 | 2243 | size_t os::numa_get_leaf_groups(int *ids, size_t size) { |
aoqi@0 | 2244 | if (size > 0) { |
aoqi@0 | 2245 | ids[0] = 0; |
aoqi@0 | 2246 | return 1; |
aoqi@0 | 2247 | } |
aoqi@0 | 2248 | return 0; |
aoqi@0 | 2249 | } |
aoqi@0 | 2250 | |
aoqi@0 | 2251 | bool os::get_page_info(char *start, page_info* info) { |
aoqi@0 | 2252 | return false; |
aoqi@0 | 2253 | } |
aoqi@0 | 2254 | |
aoqi@0 | 2255 | char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { |
aoqi@0 | 2256 | return end; |
aoqi@0 | 2257 | } |
aoqi@0 | 2258 | |
aoqi@0 | 2259 | |
aoqi@0 | 2260 | bool os::pd_uncommit_memory(char* addr, size_t size) { |
aoqi@0 | 2261 | #ifdef __OpenBSD__ |
aoqi@0 | 2262 | // XXX: Work-around mmap/MAP_FIXED bug temporarily on OpenBSD |
aoqi@0 | 2263 | return ::mprotect(addr, size, PROT_NONE) == 0; |
aoqi@0 | 2264 | #else |
aoqi@0 | 2265 | uintptr_t res = (uintptr_t) ::mmap(addr, size, PROT_NONE, |
aoqi@0 | 2266 | MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0); |
aoqi@0 | 2267 | return res != (uintptr_t) MAP_FAILED; |
aoqi@0 | 2268 | #endif |
aoqi@0 | 2269 | } |
aoqi@0 | 2270 | |
aoqi@0 | 2271 | bool os::pd_create_stack_guard_pages(char* addr, size_t size) { |
aoqi@0 | 2272 | return os::commit_memory(addr, size, !ExecMem); |
aoqi@0 | 2273 | } |
aoqi@0 | 2274 | |
aoqi@0 | 2275 | // If this is a growable mapping, remove the guard pages entirely by |
aoqi@0 | 2276 | // munmap()ping them. If not, just call uncommit_memory(). |
aoqi@0 | 2277 | bool os::remove_stack_guard_pages(char* addr, size_t size) { |
aoqi@0 | 2278 | return os::uncommit_memory(addr, size); |
aoqi@0 | 2279 | } |
aoqi@0 | 2280 | |
aoqi@0 | 2281 | static address _highest_vm_reserved_address = NULL; |
aoqi@0 | 2282 | |
aoqi@0 | 2283 | // If 'fixed' is true, anon_mmap() will attempt to reserve anonymous memory |
aoqi@0 | 2284 | // at 'requested_addr'. If there are existing memory mappings at the same |
aoqi@0 | 2285 | // location, however, they will be overwritten. If 'fixed' is false, |
aoqi@0 | 2286 | // 'requested_addr' is only treated as a hint, the return value may or |
aoqi@0 | 2287 | // may not start from the requested address. Unlike Bsd mmap(), this |
aoqi@0 | 2288 | // function returns NULL to indicate failure. |
aoqi@0 | 2289 | static char* anon_mmap(char* requested_addr, size_t bytes, bool fixed) { |
aoqi@0 | 2290 | char * addr; |
aoqi@0 | 2291 | int flags; |
aoqi@0 | 2292 | |
aoqi@0 | 2293 | flags = MAP_PRIVATE | MAP_NORESERVE | MAP_ANONYMOUS; |
aoqi@0 | 2294 | if (fixed) { |
aoqi@0 | 2295 | assert((uintptr_t)requested_addr % os::Bsd::page_size() == 0, "unaligned address"); |
aoqi@0 | 2296 | flags |= MAP_FIXED; |
aoqi@0 | 2297 | } |
aoqi@0 | 2298 | |
aoqi@0 | 2299 | // Map reserved/uncommitted pages PROT_NONE so we fail early if we |
aoqi@0 | 2300 | // touch an uncommitted page. Otherwise, the read/write might |
aoqi@0 | 2301 | // succeed if we have enough swap space to back the physical page. |
aoqi@0 | 2302 | addr = (char*)::mmap(requested_addr, bytes, PROT_NONE, |
aoqi@0 | 2303 | flags, -1, 0); |
aoqi@0 | 2304 | |
aoqi@0 | 2305 | if (addr != MAP_FAILED) { |
aoqi@0 | 2306 | // anon_mmap() should only get called during VM initialization, |
aoqi@0 | 2307 | // don't need lock (actually we can skip locking even it can be called |
aoqi@0 | 2308 | // from multiple threads, because _highest_vm_reserved_address is just a |
aoqi@0 | 2309 | // hint about the upper limit of non-stack memory regions.) |
aoqi@0 | 2310 | if ((address)addr + bytes > _highest_vm_reserved_address) { |
aoqi@0 | 2311 | _highest_vm_reserved_address = (address)addr + bytes; |
aoqi@0 | 2312 | } |
aoqi@0 | 2313 | } |
aoqi@0 | 2314 | |
aoqi@0 | 2315 | return addr == MAP_FAILED ? NULL : addr; |
aoqi@0 | 2316 | } |
aoqi@0 | 2317 | |
aoqi@0 | 2318 | // Don't update _highest_vm_reserved_address, because there might be memory |
aoqi@0 | 2319 | // regions above addr + size. If so, releasing a memory region only creates |
aoqi@0 | 2320 | // a hole in the address space, it doesn't help prevent heap-stack collision. |
aoqi@0 | 2321 | // |
aoqi@0 | 2322 | static int anon_munmap(char * addr, size_t size) { |
aoqi@0 | 2323 | return ::munmap(addr, size) == 0; |
aoqi@0 | 2324 | } |
aoqi@0 | 2325 | |
aoqi@0 | 2326 | char* os::pd_reserve_memory(size_t bytes, char* requested_addr, |
aoqi@0 | 2327 | size_t alignment_hint) { |
aoqi@0 | 2328 | return anon_mmap(requested_addr, bytes, (requested_addr != NULL)); |
aoqi@0 | 2329 | } |
aoqi@0 | 2330 | |
aoqi@0 | 2331 | bool os::pd_release_memory(char* addr, size_t size) { |
aoqi@0 | 2332 | return anon_munmap(addr, size); |
aoqi@0 | 2333 | } |
aoqi@0 | 2334 | |
aoqi@0 | 2335 | static bool bsd_mprotect(char* addr, size_t size, int prot) { |
aoqi@0 | 2336 | // Bsd wants the mprotect address argument to be page aligned. |
aoqi@0 | 2337 | char* bottom = (char*)align_size_down((intptr_t)addr, os::Bsd::page_size()); |
aoqi@0 | 2338 | |
aoqi@0 | 2339 | // According to SUSv3, mprotect() should only be used with mappings |
aoqi@0 | 2340 | // established by mmap(), and mmap() always maps whole pages. Unaligned |
aoqi@0 | 2341 | // 'addr' likely indicates problem in the VM (e.g. trying to change |
aoqi@0 | 2342 | // protection of malloc'ed or statically allocated memory). Check the |
aoqi@0 | 2343 | // caller if you hit this assert. |
aoqi@0 | 2344 | assert(addr == bottom, "sanity check"); |
aoqi@0 | 2345 | |
aoqi@0 | 2346 | size = align_size_up(pointer_delta(addr, bottom, 1) + size, os::Bsd::page_size()); |
aoqi@0 | 2347 | return ::mprotect(bottom, size, prot) == 0; |
aoqi@0 | 2348 | } |
aoqi@0 | 2349 | |
aoqi@0 | 2350 | // Set protections specified |
aoqi@0 | 2351 | bool os::protect_memory(char* addr, size_t bytes, ProtType prot, |
aoqi@0 | 2352 | bool is_committed) { |
aoqi@0 | 2353 | unsigned int p = 0; |
aoqi@0 | 2354 | switch (prot) { |
aoqi@0 | 2355 | case MEM_PROT_NONE: p = PROT_NONE; break; |
aoqi@0 | 2356 | case MEM_PROT_READ: p = PROT_READ; break; |
aoqi@0 | 2357 | case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; |
aoqi@0 | 2358 | case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; |
aoqi@0 | 2359 | default: |
aoqi@0 | 2360 | ShouldNotReachHere(); |
aoqi@0 | 2361 | } |
aoqi@0 | 2362 | // is_committed is unused. |
aoqi@0 | 2363 | return bsd_mprotect(addr, bytes, p); |
aoqi@0 | 2364 | } |
aoqi@0 | 2365 | |
aoqi@0 | 2366 | bool os::guard_memory(char* addr, size_t size) { |
aoqi@0 | 2367 | return bsd_mprotect(addr, size, PROT_NONE); |
aoqi@0 | 2368 | } |
aoqi@0 | 2369 | |
aoqi@0 | 2370 | bool os::unguard_memory(char* addr, size_t size) { |
aoqi@0 | 2371 | return bsd_mprotect(addr, size, PROT_READ|PROT_WRITE); |
aoqi@0 | 2372 | } |
aoqi@0 | 2373 | |
aoqi@0 | 2374 | bool os::Bsd::hugetlbfs_sanity_check(bool warn, size_t page_size) { |
aoqi@0 | 2375 | return false; |
aoqi@0 | 2376 | } |
aoqi@0 | 2377 | |
aoqi@0 | 2378 | // Large page support |
aoqi@0 | 2379 | |
aoqi@0 | 2380 | static size_t _large_page_size = 0; |
aoqi@0 | 2381 | |
aoqi@0 | 2382 | void os::large_page_init() { |
aoqi@0 | 2383 | } |
aoqi@0 | 2384 | |
aoqi@0 | 2385 | |
aoqi@0 | 2386 | char* os::reserve_memory_special(size_t bytes, size_t alignment, char* req_addr, bool exec) { |
aoqi@0 | 2387 | fatal("This code is not used or maintained."); |
aoqi@0 | 2388 | |
aoqi@0 | 2389 | // "exec" is passed in but not used. Creating the shared image for |
aoqi@0 | 2390 | // the code cache doesn't have an SHM_X executable permission to check. |
aoqi@0 | 2391 | assert(UseLargePages && UseSHM, "only for SHM large pages"); |
aoqi@0 | 2392 | |
aoqi@0 | 2393 | key_t key = IPC_PRIVATE; |
aoqi@0 | 2394 | char *addr; |
aoqi@0 | 2395 | |
aoqi@0 | 2396 | bool warn_on_failure = UseLargePages && |
aoqi@0 | 2397 | (!FLAG_IS_DEFAULT(UseLargePages) || |
aoqi@0 | 2398 | !FLAG_IS_DEFAULT(LargePageSizeInBytes) |
aoqi@0 | 2399 | ); |
aoqi@0 | 2400 | |
aoqi@0 | 2401 | // Create a large shared memory region to attach to based on size. |
aoqi@0 | 2402 | // Currently, size is the total size of the heap |
aoqi@0 | 2403 | int shmid = shmget(key, bytes, IPC_CREAT|SHM_R|SHM_W); |
aoqi@0 | 2404 | if (shmid == -1) { |
aoqi@0 | 2405 | // Possible reasons for shmget failure: |
aoqi@0 | 2406 | // 1. shmmax is too small for Java heap. |
aoqi@0 | 2407 | // > check shmmax value: cat /proc/sys/kernel/shmmax |
aoqi@0 | 2408 | // > increase shmmax value: echo "0xffffffff" > /proc/sys/kernel/shmmax |
aoqi@0 | 2409 | // 2. not enough large page memory. |
aoqi@0 | 2410 | // > check available large pages: cat /proc/meminfo |
aoqi@0 | 2411 | // > increase amount of large pages: |
aoqi@0 | 2412 | // echo new_value > /proc/sys/vm/nr_hugepages |
aoqi@0 | 2413 | // Note 1: different Bsd may use different name for this property, |
aoqi@0 | 2414 | // e.g. on Redhat AS-3 it is "hugetlb_pool". |
aoqi@0 | 2415 | // Note 2: it's possible there's enough physical memory available but |
aoqi@0 | 2416 | // they are so fragmented after a long run that they can't |
aoqi@0 | 2417 | // coalesce into large pages. Try to reserve large pages when |
aoqi@0 | 2418 | // the system is still "fresh". |
aoqi@0 | 2419 | if (warn_on_failure) { |
aoqi@0 | 2420 | warning("Failed to reserve shared memory (errno = %d).", errno); |
aoqi@0 | 2421 | } |
aoqi@0 | 2422 | return NULL; |
aoqi@0 | 2423 | } |
aoqi@0 | 2424 | |
aoqi@0 | 2425 | // attach to the region |
aoqi@0 | 2426 | addr = (char*)shmat(shmid, req_addr, 0); |
aoqi@0 | 2427 | int err = errno; |
aoqi@0 | 2428 | |
aoqi@0 | 2429 | // Remove shmid. If shmat() is successful, the actual shared memory segment |
aoqi@0 | 2430 | // will be deleted when it's detached by shmdt() or when the process |
aoqi@0 | 2431 | // terminates. If shmat() is not successful this will remove the shared |
aoqi@0 | 2432 | // segment immediately. |
aoqi@0 | 2433 | shmctl(shmid, IPC_RMID, NULL); |
aoqi@0 | 2434 | |
aoqi@0 | 2435 | if ((intptr_t)addr == -1) { |
aoqi@0 | 2436 | if (warn_on_failure) { |
aoqi@0 | 2437 | warning("Failed to attach shared memory (errno = %d).", err); |
aoqi@0 | 2438 | } |
aoqi@0 | 2439 | return NULL; |
aoqi@0 | 2440 | } |
aoqi@0 | 2441 | |
aoqi@0 | 2442 | // The memory is committed |
zgu@7074 | 2443 | MemTracker::record_virtual_memory_reserve_and_commit((address)addr, bytes, CALLER_PC); |
aoqi@0 | 2444 | |
aoqi@0 | 2445 | return addr; |
aoqi@0 | 2446 | } |
aoqi@0 | 2447 | |
aoqi@0 | 2448 | bool os::release_memory_special(char* base, size_t bytes) { |
zgu@7074 | 2449 | if (MemTracker::tracking_level() > NMT_minimal) { |
zgu@7074 | 2450 | Tracker tkr = MemTracker::get_virtual_memory_release_tracker(); |
zgu@7074 | 2451 | // detaching the SHM segment will also delete it, see reserve_memory_special() |
zgu@7074 | 2452 | int rslt = shmdt(base); |
zgu@7074 | 2453 | if (rslt == 0) { |
zgu@7074 | 2454 | tkr.record((address)base, bytes); |
zgu@7074 | 2455 | return true; |
zgu@7074 | 2456 | } else { |
zgu@7074 | 2457 | return false; |
zgu@7074 | 2458 | } |
aoqi@0 | 2459 | } else { |
zgu@7074 | 2460 | return shmdt(base) == 0; |
aoqi@0 | 2461 | } |
aoqi@0 | 2462 | } |
aoqi@0 | 2463 | |
aoqi@0 | 2464 | size_t os::large_page_size() { |
aoqi@0 | 2465 | return _large_page_size; |
aoqi@0 | 2466 | } |
aoqi@0 | 2467 | |
aoqi@0 | 2468 | // HugeTLBFS allows application to commit large page memory on demand; |
aoqi@0 | 2469 | // with SysV SHM the entire memory region must be allocated as shared |
aoqi@0 | 2470 | // memory. |
aoqi@0 | 2471 | bool os::can_commit_large_page_memory() { |
aoqi@0 | 2472 | return UseHugeTLBFS; |
aoqi@0 | 2473 | } |
aoqi@0 | 2474 | |
aoqi@0 | 2475 | bool os::can_execute_large_page_memory() { |
aoqi@0 | 2476 | return UseHugeTLBFS; |
aoqi@0 | 2477 | } |
aoqi@0 | 2478 | |
aoqi@0 | 2479 | // Reserve memory at an arbitrary address, only if that area is |
aoqi@0 | 2480 | // available (and not reserved for something else). |
aoqi@0 | 2481 | |
aoqi@0 | 2482 | char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { |
aoqi@0 | 2483 | const int max_tries = 10; |
aoqi@0 | 2484 | char* base[max_tries]; |
aoqi@0 | 2485 | size_t size[max_tries]; |
aoqi@0 | 2486 | const size_t gap = 0x000000; |
aoqi@0 | 2487 | |
aoqi@0 | 2488 | // Assert only that the size is a multiple of the page size, since |
aoqi@0 | 2489 | // that's all that mmap requires, and since that's all we really know |
aoqi@0 | 2490 | // about at this low abstraction level. If we need higher alignment, |
aoqi@0 | 2491 | // we can either pass an alignment to this method or verify alignment |
aoqi@0 | 2492 | // in one of the methods further up the call chain. See bug 5044738. |
aoqi@0 | 2493 | assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); |
aoqi@0 | 2494 | |
aoqi@0 | 2495 | // Repeatedly allocate blocks until the block is allocated at the |
aoqi@0 | 2496 | // right spot. Give up after max_tries. Note that reserve_memory() will |
aoqi@0 | 2497 | // automatically update _highest_vm_reserved_address if the call is |
aoqi@0 | 2498 | // successful. The variable tracks the highest memory address every reserved |
aoqi@0 | 2499 | // by JVM. It is used to detect heap-stack collision if running with |
aoqi@0 | 2500 | // fixed-stack BsdThreads. Because here we may attempt to reserve more |
aoqi@0 | 2501 | // space than needed, it could confuse the collision detecting code. To |
aoqi@0 | 2502 | // solve the problem, save current _highest_vm_reserved_address and |
aoqi@0 | 2503 | // calculate the correct value before return. |
aoqi@0 | 2504 | address old_highest = _highest_vm_reserved_address; |
aoqi@0 | 2505 | |
aoqi@0 | 2506 | // Bsd mmap allows caller to pass an address as hint; give it a try first, |
aoqi@0 | 2507 | // if kernel honors the hint then we can return immediately. |
aoqi@0 | 2508 | char * addr = anon_mmap(requested_addr, bytes, false); |
aoqi@0 | 2509 | if (addr == requested_addr) { |
aoqi@0 | 2510 | return requested_addr; |
aoqi@0 | 2511 | } |
aoqi@0 | 2512 | |
aoqi@0 | 2513 | if (addr != NULL) { |
aoqi@0 | 2514 | // mmap() is successful but it fails to reserve at the requested address |
aoqi@0 | 2515 | anon_munmap(addr, bytes); |
aoqi@0 | 2516 | } |
aoqi@0 | 2517 | |
aoqi@0 | 2518 | int i; |
aoqi@0 | 2519 | for (i = 0; i < max_tries; ++i) { |
aoqi@0 | 2520 | base[i] = reserve_memory(bytes); |
aoqi@0 | 2521 | |
aoqi@0 | 2522 | if (base[i] != NULL) { |
aoqi@0 | 2523 | // Is this the block we wanted? |
aoqi@0 | 2524 | if (base[i] == requested_addr) { |
aoqi@0 | 2525 | size[i] = bytes; |
aoqi@0 | 2526 | break; |
aoqi@0 | 2527 | } |
aoqi@0 | 2528 | |
aoqi@0 | 2529 | // Does this overlap the block we wanted? Give back the overlapped |
aoqi@0 | 2530 | // parts and try again. |
aoqi@0 | 2531 | |
aoqi@0 | 2532 | size_t top_overlap = requested_addr + (bytes + gap) - base[i]; |
aoqi@0 | 2533 | if (top_overlap >= 0 && top_overlap < bytes) { |
aoqi@0 | 2534 | unmap_memory(base[i], top_overlap); |
aoqi@0 | 2535 | base[i] += top_overlap; |
aoqi@0 | 2536 | size[i] = bytes - top_overlap; |
aoqi@0 | 2537 | } else { |
aoqi@0 | 2538 | size_t bottom_overlap = base[i] + bytes - requested_addr; |
aoqi@0 | 2539 | if (bottom_overlap >= 0 && bottom_overlap < bytes) { |
aoqi@0 | 2540 | unmap_memory(requested_addr, bottom_overlap); |
aoqi@0 | 2541 | size[i] = bytes - bottom_overlap; |
aoqi@0 | 2542 | } else { |
aoqi@0 | 2543 | size[i] = bytes; |
aoqi@0 | 2544 | } |
aoqi@0 | 2545 | } |
aoqi@0 | 2546 | } |
aoqi@0 | 2547 | } |
aoqi@0 | 2548 | |
aoqi@0 | 2549 | // Give back the unused reserved pieces. |
aoqi@0 | 2550 | |
aoqi@0 | 2551 | for (int j = 0; j < i; ++j) { |
aoqi@0 | 2552 | if (base[j] != NULL) { |
aoqi@0 | 2553 | unmap_memory(base[j], size[j]); |
aoqi@0 | 2554 | } |
aoqi@0 | 2555 | } |
aoqi@0 | 2556 | |
aoqi@0 | 2557 | if (i < max_tries) { |
aoqi@0 | 2558 | _highest_vm_reserved_address = MAX2(old_highest, (address)requested_addr + bytes); |
aoqi@0 | 2559 | return requested_addr; |
aoqi@0 | 2560 | } else { |
aoqi@0 | 2561 | _highest_vm_reserved_address = old_highest; |
aoqi@0 | 2562 | return NULL; |
aoqi@0 | 2563 | } |
aoqi@0 | 2564 | } |
aoqi@0 | 2565 | |
aoqi@0 | 2566 | size_t os::read(int fd, void *buf, unsigned int nBytes) { |
aoqi@0 | 2567 | RESTARTABLE_RETURN_INT(::read(fd, buf, nBytes)); |
aoqi@0 | 2568 | } |
aoqi@0 | 2569 | |
aoqi@0 | 2570 | // TODO-FIXME: reconcile Solaris' os::sleep with the bsd variation. |
aoqi@0 | 2571 | // Solaris uses poll(), bsd uses park(). |
aoqi@0 | 2572 | // Poll() is likely a better choice, assuming that Thread.interrupt() |
aoqi@0 | 2573 | // generates a SIGUSRx signal. Note that SIGUSR1 can interfere with |
aoqi@0 | 2574 | // SIGSEGV, see 4355769. |
aoqi@0 | 2575 | |
aoqi@0 | 2576 | int os::sleep(Thread* thread, jlong millis, bool interruptible) { |
aoqi@0 | 2577 | assert(thread == Thread::current(), "thread consistency check"); |
aoqi@0 | 2578 | |
aoqi@0 | 2579 | ParkEvent * const slp = thread->_SleepEvent ; |
aoqi@0 | 2580 | slp->reset() ; |
aoqi@0 | 2581 | OrderAccess::fence() ; |
aoqi@0 | 2582 | |
aoqi@0 | 2583 | if (interruptible) { |
aoqi@0 | 2584 | jlong prevtime = javaTimeNanos(); |
aoqi@0 | 2585 | |
aoqi@0 | 2586 | for (;;) { |
aoqi@0 | 2587 | if (os::is_interrupted(thread, true)) { |
aoqi@0 | 2588 | return OS_INTRPT; |
aoqi@0 | 2589 | } |
aoqi@0 | 2590 | |
aoqi@0 | 2591 | jlong newtime = javaTimeNanos(); |
aoqi@0 | 2592 | |
aoqi@0 | 2593 | if (newtime - prevtime < 0) { |
aoqi@0 | 2594 | // time moving backwards, should only happen if no monotonic clock |
aoqi@0 | 2595 | // not a guarantee() because JVM should not abort on kernel/glibc bugs |
aoqi@0 | 2596 | assert(!Bsd::supports_monotonic_clock(), "time moving backwards"); |
aoqi@0 | 2597 | } else { |
aoqi@0 | 2598 | millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
aoqi@0 | 2599 | } |
aoqi@0 | 2600 | |
aoqi@0 | 2601 | if(millis <= 0) { |
aoqi@0 | 2602 | return OS_OK; |
aoqi@0 | 2603 | } |
aoqi@0 | 2604 | |
aoqi@0 | 2605 | prevtime = newtime; |
aoqi@0 | 2606 | |
aoqi@0 | 2607 | { |
aoqi@0 | 2608 | assert(thread->is_Java_thread(), "sanity check"); |
aoqi@0 | 2609 | JavaThread *jt = (JavaThread *) thread; |
aoqi@0 | 2610 | ThreadBlockInVM tbivm(jt); |
aoqi@0 | 2611 | OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); |
aoqi@0 | 2612 | |
aoqi@0 | 2613 | jt->set_suspend_equivalent(); |
aoqi@0 | 2614 | // cleared by handle_special_suspend_equivalent_condition() or |
aoqi@0 | 2615 | // java_suspend_self() via check_and_wait_while_suspended() |
aoqi@0 | 2616 | |
aoqi@0 | 2617 | slp->park(millis); |
aoqi@0 | 2618 | |
aoqi@0 | 2619 | // were we externally suspended while we were waiting? |
aoqi@0 | 2620 | jt->check_and_wait_while_suspended(); |
aoqi@0 | 2621 | } |
aoqi@0 | 2622 | } |
aoqi@0 | 2623 | } else { |
aoqi@0 | 2624 | OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
aoqi@0 | 2625 | jlong prevtime = javaTimeNanos(); |
aoqi@0 | 2626 | |
aoqi@0 | 2627 | for (;;) { |
aoqi@0 | 2628 | // It'd be nice to avoid the back-to-back javaTimeNanos() calls on |
aoqi@0 | 2629 | // the 1st iteration ... |
aoqi@0 | 2630 | jlong newtime = javaTimeNanos(); |
aoqi@0 | 2631 | |
aoqi@0 | 2632 | if (newtime - prevtime < 0) { |
aoqi@0 | 2633 | // time moving backwards, should only happen if no monotonic clock |
aoqi@0 | 2634 | // not a guarantee() because JVM should not abort on kernel/glibc bugs |
aoqi@0 | 2635 | assert(!Bsd::supports_monotonic_clock(), "time moving backwards"); |
aoqi@0 | 2636 | } else { |
aoqi@0 | 2637 | millis -= (newtime - prevtime) / NANOSECS_PER_MILLISEC; |
aoqi@0 | 2638 | } |
aoqi@0 | 2639 | |
aoqi@0 | 2640 | if(millis <= 0) break ; |
aoqi@0 | 2641 | |
aoqi@0 | 2642 | prevtime = newtime; |
aoqi@0 | 2643 | slp->park(millis); |
aoqi@0 | 2644 | } |
aoqi@0 | 2645 | return OS_OK ; |
aoqi@0 | 2646 | } |
aoqi@0 | 2647 | } |
aoqi@0 | 2648 | |
aoqi@0 | 2649 | void os::naked_short_sleep(jlong ms) { |
aoqi@0 | 2650 | struct timespec req; |
aoqi@0 | 2651 | |
aoqi@0 | 2652 | assert(ms < 1000, "Un-interruptable sleep, short time use only"); |
aoqi@0 | 2653 | req.tv_sec = 0; |
aoqi@0 | 2654 | if (ms > 0) { |
aoqi@0 | 2655 | req.tv_nsec = (ms % 1000) * 1000000; |
aoqi@0 | 2656 | } |
aoqi@0 | 2657 | else { |
aoqi@0 | 2658 | req.tv_nsec = 1; |
aoqi@0 | 2659 | } |
aoqi@0 | 2660 | |
aoqi@0 | 2661 | nanosleep(&req, NULL); |
aoqi@0 | 2662 | |
aoqi@0 | 2663 | return; |
aoqi@0 | 2664 | } |
aoqi@0 | 2665 | |
aoqi@0 | 2666 | // Sleep forever; naked call to OS-specific sleep; use with CAUTION |
aoqi@0 | 2667 | void os::infinite_sleep() { |
aoqi@0 | 2668 | while (true) { // sleep forever ... |
aoqi@0 | 2669 | ::sleep(100); // ... 100 seconds at a time |
aoqi@0 | 2670 | } |
aoqi@0 | 2671 | } |
aoqi@0 | 2672 | |
aoqi@0 | 2673 | // Used to convert frequent JVM_Yield() to nops |
aoqi@0 | 2674 | bool os::dont_yield() { |
aoqi@0 | 2675 | return DontYieldALot; |
aoqi@0 | 2676 | } |
aoqi@0 | 2677 | |
aoqi@0 | 2678 | void os::yield() { |
aoqi@0 | 2679 | sched_yield(); |
aoqi@0 | 2680 | } |
aoqi@0 | 2681 | |
aoqi@0 | 2682 | os::YieldResult os::NakedYield() { sched_yield(); return os::YIELD_UNKNOWN ;} |
aoqi@0 | 2683 | |
aoqi@0 | 2684 | void os::yield_all(int attempts) { |
aoqi@0 | 2685 | // Yields to all threads, including threads with lower priorities |
aoqi@0 | 2686 | // Threads on Bsd are all with same priority. The Solaris style |
aoqi@0 | 2687 | // os::yield_all() with nanosleep(1ms) is not necessary. |
aoqi@0 | 2688 | sched_yield(); |
aoqi@0 | 2689 | } |
aoqi@0 | 2690 | |
aoqi@0 | 2691 | // Called from the tight loops to possibly influence time-sharing heuristics |
aoqi@0 | 2692 | void os::loop_breaker(int attempts) { |
aoqi@0 | 2693 | os::yield_all(attempts); |
aoqi@0 | 2694 | } |
aoqi@0 | 2695 | |
aoqi@0 | 2696 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 2697 | // thread priority support |
aoqi@0 | 2698 | |
aoqi@0 | 2699 | // Note: Normal Bsd applications are run with SCHED_OTHER policy. SCHED_OTHER |
aoqi@0 | 2700 | // only supports dynamic priority, static priority must be zero. For real-time |
aoqi@0 | 2701 | // applications, Bsd supports SCHED_RR which allows static priority (1-99). |
aoqi@0 | 2702 | // However, for large multi-threaded applications, SCHED_RR is not only slower |
aoqi@0 | 2703 | // than SCHED_OTHER, but also very unstable (my volano tests hang hard 4 out |
aoqi@0 | 2704 | // of 5 runs - Sep 2005). |
aoqi@0 | 2705 | // |
aoqi@0 | 2706 | // The following code actually changes the niceness of kernel-thread/LWP. It |
aoqi@0 | 2707 | // has an assumption that setpriority() only modifies one kernel-thread/LWP, |
aoqi@0 | 2708 | // not the entire user process, and user level threads are 1:1 mapped to kernel |
aoqi@0 | 2709 | // threads. It has always been the case, but could change in the future. For |
aoqi@0 | 2710 | // this reason, the code should not be used as default (ThreadPriorityPolicy=0). |
aoqi@0 | 2711 | // It is only used when ThreadPriorityPolicy=1 and requires root privilege. |
aoqi@0 | 2712 | |
aoqi@0 | 2713 | #if !defined(__APPLE__) |
aoqi@0 | 2714 | int os::java_to_os_priority[CriticalPriority + 1] = { |
aoqi@0 | 2715 | 19, // 0 Entry should never be used |
aoqi@0 | 2716 | |
aoqi@0 | 2717 | 0, // 1 MinPriority |
aoqi@0 | 2718 | 3, // 2 |
aoqi@0 | 2719 | 6, // 3 |
aoqi@0 | 2720 | |
aoqi@0 | 2721 | 10, // 4 |
aoqi@0 | 2722 | 15, // 5 NormPriority |
aoqi@0 | 2723 | 18, // 6 |
aoqi@0 | 2724 | |
aoqi@0 | 2725 | 21, // 7 |
aoqi@0 | 2726 | 25, // 8 |
aoqi@0 | 2727 | 28, // 9 NearMaxPriority |
aoqi@0 | 2728 | |
aoqi@0 | 2729 | 31, // 10 MaxPriority |
aoqi@0 | 2730 | |
aoqi@0 | 2731 | 31 // 11 CriticalPriority |
aoqi@0 | 2732 | }; |
aoqi@0 | 2733 | #else |
aoqi@0 | 2734 | /* Using Mach high-level priority assignments */ |
aoqi@0 | 2735 | int os::java_to_os_priority[CriticalPriority + 1] = { |
aoqi@0 | 2736 | 0, // 0 Entry should never be used (MINPRI_USER) |
aoqi@0 | 2737 | |
aoqi@0 | 2738 | 27, // 1 MinPriority |
aoqi@0 | 2739 | 28, // 2 |
aoqi@0 | 2740 | 29, // 3 |
aoqi@0 | 2741 | |
aoqi@0 | 2742 | 30, // 4 |
aoqi@0 | 2743 | 31, // 5 NormPriority (BASEPRI_DEFAULT) |
aoqi@0 | 2744 | 32, // 6 |
aoqi@0 | 2745 | |
aoqi@0 | 2746 | 33, // 7 |
aoqi@0 | 2747 | 34, // 8 |
aoqi@0 | 2748 | 35, // 9 NearMaxPriority |
aoqi@0 | 2749 | |
aoqi@0 | 2750 | 36, // 10 MaxPriority |
aoqi@0 | 2751 | |
aoqi@0 | 2752 | 36 // 11 CriticalPriority |
aoqi@0 | 2753 | }; |
aoqi@0 | 2754 | #endif |
aoqi@0 | 2755 | |
aoqi@0 | 2756 | static int prio_init() { |
aoqi@0 | 2757 | if (ThreadPriorityPolicy == 1) { |
aoqi@0 | 2758 | // Only root can raise thread priority. Don't allow ThreadPriorityPolicy=1 |
aoqi@0 | 2759 | // if effective uid is not root. Perhaps, a more elegant way of doing |
aoqi@0 | 2760 | // this is to test CAP_SYS_NICE capability, but that will require libcap.so |
aoqi@0 | 2761 | if (geteuid() != 0) { |
aoqi@0 | 2762 | if (!FLAG_IS_DEFAULT(ThreadPriorityPolicy)) { |
aoqi@0 | 2763 | warning("-XX:ThreadPriorityPolicy requires root privilege on Bsd"); |
aoqi@0 | 2764 | } |
aoqi@0 | 2765 | ThreadPriorityPolicy = 0; |
aoqi@0 | 2766 | } |
aoqi@0 | 2767 | } |
aoqi@0 | 2768 | if (UseCriticalJavaThreadPriority) { |
aoqi@0 | 2769 | os::java_to_os_priority[MaxPriority] = os::java_to_os_priority[CriticalPriority]; |
aoqi@0 | 2770 | } |
aoqi@0 | 2771 | return 0; |
aoqi@0 | 2772 | } |
aoqi@0 | 2773 | |
aoqi@0 | 2774 | OSReturn os::set_native_priority(Thread* thread, int newpri) { |
aoqi@0 | 2775 | if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) return OS_OK; |
aoqi@0 | 2776 | |
aoqi@0 | 2777 | #ifdef __OpenBSD__ |
aoqi@0 | 2778 | // OpenBSD pthread_setprio starves low priority threads |
aoqi@0 | 2779 | return OS_OK; |
aoqi@0 | 2780 | #elif defined(__FreeBSD__) |
aoqi@0 | 2781 | int ret = pthread_setprio(thread->osthread()->pthread_id(), newpri); |
aoqi@0 | 2782 | #elif defined(__APPLE__) || defined(__NetBSD__) |
aoqi@0 | 2783 | struct sched_param sp; |
aoqi@0 | 2784 | int policy; |
aoqi@0 | 2785 | pthread_t self = pthread_self(); |
aoqi@0 | 2786 | |
aoqi@0 | 2787 | if (pthread_getschedparam(self, &policy, &sp) != 0) |
aoqi@0 | 2788 | return OS_ERR; |
aoqi@0 | 2789 | |
aoqi@0 | 2790 | sp.sched_priority = newpri; |
aoqi@0 | 2791 | if (pthread_setschedparam(self, policy, &sp) != 0) |
aoqi@0 | 2792 | return OS_ERR; |
aoqi@0 | 2793 | |
aoqi@0 | 2794 | return OS_OK; |
aoqi@0 | 2795 | #else |
aoqi@0 | 2796 | int ret = setpriority(PRIO_PROCESS, thread->osthread()->thread_id(), newpri); |
aoqi@0 | 2797 | return (ret == 0) ? OS_OK : OS_ERR; |
aoqi@0 | 2798 | #endif |
aoqi@0 | 2799 | } |
aoqi@0 | 2800 | |
aoqi@0 | 2801 | OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { |
aoqi@0 | 2802 | if ( !UseThreadPriorities || ThreadPriorityPolicy == 0 ) { |
aoqi@0 | 2803 | *priority_ptr = java_to_os_priority[NormPriority]; |
aoqi@0 | 2804 | return OS_OK; |
aoqi@0 | 2805 | } |
aoqi@0 | 2806 | |
aoqi@0 | 2807 | errno = 0; |
aoqi@0 | 2808 | #if defined(__OpenBSD__) || defined(__FreeBSD__) |
aoqi@0 | 2809 | *priority_ptr = pthread_getprio(thread->osthread()->pthread_id()); |
aoqi@0 | 2810 | #elif defined(__APPLE__) || defined(__NetBSD__) |
aoqi@0 | 2811 | int policy; |
aoqi@0 | 2812 | struct sched_param sp; |
aoqi@0 | 2813 | |
aoqi@0 | 2814 | pthread_getschedparam(pthread_self(), &policy, &sp); |
aoqi@0 | 2815 | *priority_ptr = sp.sched_priority; |
aoqi@0 | 2816 | #else |
aoqi@0 | 2817 | *priority_ptr = getpriority(PRIO_PROCESS, thread->osthread()->thread_id()); |
aoqi@0 | 2818 | #endif |
aoqi@0 | 2819 | return (*priority_ptr != -1 || errno == 0 ? OS_OK : OS_ERR); |
aoqi@0 | 2820 | } |
aoqi@0 | 2821 | |
aoqi@0 | 2822 | // Hint to the underlying OS that a task switch would not be good. |
aoqi@0 | 2823 | // Void return because it's a hint and can fail. |
aoqi@0 | 2824 | void os::hint_no_preempt() {} |
aoqi@0 | 2825 | |
aoqi@0 | 2826 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 2827 | // suspend/resume support |
aoqi@0 | 2828 | |
aoqi@0 | 2829 | // the low-level signal-based suspend/resume support is a remnant from the |
aoqi@0 | 2830 | // old VM-suspension that used to be for java-suspension, safepoints etc, |
aoqi@0 | 2831 | // within hotspot. Now there is a single use-case for this: |
aoqi@0 | 2832 | // - calling get_thread_pc() on the VMThread by the flat-profiler task |
aoqi@0 | 2833 | // that runs in the watcher thread. |
aoqi@0 | 2834 | // The remaining code is greatly simplified from the more general suspension |
aoqi@0 | 2835 | // code that used to be used. |
aoqi@0 | 2836 | // |
aoqi@0 | 2837 | // The protocol is quite simple: |
aoqi@0 | 2838 | // - suspend: |
aoqi@0 | 2839 | // - sends a signal to the target thread |
aoqi@0 | 2840 | // - polls the suspend state of the osthread using a yield loop |
aoqi@0 | 2841 | // - target thread signal handler (SR_handler) sets suspend state |
aoqi@0 | 2842 | // and blocks in sigsuspend until continued |
aoqi@0 | 2843 | // - resume: |
aoqi@0 | 2844 | // - sets target osthread state to continue |
aoqi@0 | 2845 | // - sends signal to end the sigsuspend loop in the SR_handler |
aoqi@0 | 2846 | // |
aoqi@0 | 2847 | // Note that the SR_lock plays no role in this suspend/resume protocol. |
aoqi@0 | 2848 | // |
aoqi@0 | 2849 | |
aoqi@0 | 2850 | static void resume_clear_context(OSThread *osthread) { |
aoqi@0 | 2851 | osthread->set_ucontext(NULL); |
aoqi@0 | 2852 | osthread->set_siginfo(NULL); |
aoqi@0 | 2853 | } |
aoqi@0 | 2854 | |
aoqi@0 | 2855 | static void suspend_save_context(OSThread *osthread, siginfo_t* siginfo, ucontext_t* context) { |
aoqi@0 | 2856 | osthread->set_ucontext(context); |
aoqi@0 | 2857 | osthread->set_siginfo(siginfo); |
aoqi@0 | 2858 | } |
aoqi@0 | 2859 | |
aoqi@0 | 2860 | // |
aoqi@0 | 2861 | // Handler function invoked when a thread's execution is suspended or |
aoqi@0 | 2862 | // resumed. We have to be careful that only async-safe functions are |
aoqi@0 | 2863 | // called here (Note: most pthread functions are not async safe and |
aoqi@0 | 2864 | // should be avoided.) |
aoqi@0 | 2865 | // |
aoqi@0 | 2866 | // Note: sigwait() is a more natural fit than sigsuspend() from an |
aoqi@0 | 2867 | // interface point of view, but sigwait() prevents the signal hander |
aoqi@0 | 2868 | // from being run. libpthread would get very confused by not having |
aoqi@0 | 2869 | // its signal handlers run and prevents sigwait()'s use with the |
aoqi@0 | 2870 | // mutex granting granting signal. |
aoqi@0 | 2871 | // |
aoqi@0 | 2872 | // Currently only ever called on the VMThread or JavaThread |
aoqi@0 | 2873 | // |
aoqi@0 | 2874 | static void SR_handler(int sig, siginfo_t* siginfo, ucontext_t* context) { |
aoqi@0 | 2875 | // Save and restore errno to avoid confusing native code with EINTR |
aoqi@0 | 2876 | // after sigsuspend. |
aoqi@0 | 2877 | int old_errno = errno; |
aoqi@0 | 2878 | |
aoqi@0 | 2879 | Thread* thread = Thread::current(); |
aoqi@0 | 2880 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 2881 | assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); |
aoqi@0 | 2882 | |
aoqi@0 | 2883 | os::SuspendResume::State current = osthread->sr.state(); |
aoqi@0 | 2884 | if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { |
aoqi@0 | 2885 | suspend_save_context(osthread, siginfo, context); |
aoqi@0 | 2886 | |
aoqi@0 | 2887 | // attempt to switch the state, we assume we had a SUSPEND_REQUEST |
aoqi@0 | 2888 | os::SuspendResume::State state = osthread->sr.suspended(); |
aoqi@0 | 2889 | if (state == os::SuspendResume::SR_SUSPENDED) { |
aoqi@0 | 2890 | sigset_t suspend_set; // signals for sigsuspend() |
aoqi@0 | 2891 | |
aoqi@0 | 2892 | // get current set of blocked signals and unblock resume signal |
aoqi@0 | 2893 | pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); |
aoqi@0 | 2894 | sigdelset(&suspend_set, SR_signum); |
aoqi@0 | 2895 | |
aoqi@0 | 2896 | sr_semaphore.signal(); |
aoqi@0 | 2897 | // wait here until we are resumed |
aoqi@0 | 2898 | while (1) { |
aoqi@0 | 2899 | sigsuspend(&suspend_set); |
aoqi@0 | 2900 | |
aoqi@0 | 2901 | os::SuspendResume::State result = osthread->sr.running(); |
aoqi@0 | 2902 | if (result == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 2903 | sr_semaphore.signal(); |
aoqi@0 | 2904 | break; |
aoqi@0 | 2905 | } else if (result != os::SuspendResume::SR_SUSPENDED) { |
aoqi@0 | 2906 | ShouldNotReachHere(); |
aoqi@0 | 2907 | } |
aoqi@0 | 2908 | } |
aoqi@0 | 2909 | |
aoqi@0 | 2910 | } else if (state == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 2911 | // request was cancelled, continue |
aoqi@0 | 2912 | } else { |
aoqi@0 | 2913 | ShouldNotReachHere(); |
aoqi@0 | 2914 | } |
aoqi@0 | 2915 | |
aoqi@0 | 2916 | resume_clear_context(osthread); |
aoqi@0 | 2917 | } else if (current == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 2918 | // request was cancelled, continue |
aoqi@0 | 2919 | } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { |
aoqi@0 | 2920 | // ignore |
aoqi@0 | 2921 | } else { |
aoqi@0 | 2922 | // ignore |
aoqi@0 | 2923 | } |
aoqi@0 | 2924 | |
aoqi@0 | 2925 | errno = old_errno; |
aoqi@0 | 2926 | } |
aoqi@0 | 2927 | |
aoqi@0 | 2928 | |
aoqi@0 | 2929 | static int SR_initialize() { |
aoqi@0 | 2930 | struct sigaction act; |
aoqi@0 | 2931 | char *s; |
aoqi@0 | 2932 | /* Get signal number to use for suspend/resume */ |
aoqi@0 | 2933 | if ((s = ::getenv("_JAVA_SR_SIGNUM")) != 0) { |
aoqi@0 | 2934 | int sig = ::strtol(s, 0, 10); |
aoqi@0 | 2935 | if (sig > 0 || sig < NSIG) { |
aoqi@0 | 2936 | SR_signum = sig; |
aoqi@0 | 2937 | } |
aoqi@0 | 2938 | } |
aoqi@0 | 2939 | |
aoqi@0 | 2940 | assert(SR_signum > SIGSEGV && SR_signum > SIGBUS, |
aoqi@0 | 2941 | "SR_signum must be greater than max(SIGSEGV, SIGBUS), see 4355769"); |
aoqi@0 | 2942 | |
aoqi@0 | 2943 | sigemptyset(&SR_sigset); |
aoqi@0 | 2944 | sigaddset(&SR_sigset, SR_signum); |
aoqi@0 | 2945 | |
aoqi@0 | 2946 | /* Set up signal handler for suspend/resume */ |
aoqi@0 | 2947 | act.sa_flags = SA_RESTART|SA_SIGINFO; |
aoqi@0 | 2948 | act.sa_handler = (void (*)(int)) SR_handler; |
aoqi@0 | 2949 | |
aoqi@0 | 2950 | // SR_signum is blocked by default. |
aoqi@0 | 2951 | // 4528190 - We also need to block pthread restart signal (32 on all |
aoqi@0 | 2952 | // supported Bsd platforms). Note that BsdThreads need to block |
aoqi@0 | 2953 | // this signal for all threads to work properly. So we don't have |
aoqi@0 | 2954 | // to use hard-coded signal number when setting up the mask. |
aoqi@0 | 2955 | pthread_sigmask(SIG_BLOCK, NULL, &act.sa_mask); |
aoqi@0 | 2956 | |
aoqi@0 | 2957 | if (sigaction(SR_signum, &act, 0) == -1) { |
aoqi@0 | 2958 | return -1; |
aoqi@0 | 2959 | } |
aoqi@0 | 2960 | |
aoqi@0 | 2961 | // Save signal flag |
aoqi@0 | 2962 | os::Bsd::set_our_sigflags(SR_signum, act.sa_flags); |
aoqi@0 | 2963 | return 0; |
aoqi@0 | 2964 | } |
aoqi@0 | 2965 | |
aoqi@0 | 2966 | static int sr_notify(OSThread* osthread) { |
aoqi@0 | 2967 | int status = pthread_kill(osthread->pthread_id(), SR_signum); |
aoqi@0 | 2968 | assert_status(status == 0, status, "pthread_kill"); |
aoqi@0 | 2969 | return status; |
aoqi@0 | 2970 | } |
aoqi@0 | 2971 | |
aoqi@0 | 2972 | // "Randomly" selected value for how long we want to spin |
aoqi@0 | 2973 | // before bailing out on suspending a thread, also how often |
aoqi@0 | 2974 | // we send a signal to a thread we want to resume |
aoqi@0 | 2975 | static const int RANDOMLY_LARGE_INTEGER = 1000000; |
aoqi@0 | 2976 | static const int RANDOMLY_LARGE_INTEGER2 = 100; |
aoqi@0 | 2977 | |
aoqi@0 | 2978 | // returns true on success and false on error - really an error is fatal |
aoqi@0 | 2979 | // but this seems the normal response to library errors |
aoqi@0 | 2980 | static bool do_suspend(OSThread* osthread) { |
aoqi@0 | 2981 | assert(osthread->sr.is_running(), "thread should be running"); |
aoqi@0 | 2982 | assert(!sr_semaphore.trywait(), "semaphore has invalid state"); |
aoqi@0 | 2983 | |
aoqi@0 | 2984 | // mark as suspended and send signal |
aoqi@0 | 2985 | if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { |
aoqi@0 | 2986 | // failed to switch, state wasn't running? |
aoqi@0 | 2987 | ShouldNotReachHere(); |
aoqi@0 | 2988 | return false; |
aoqi@0 | 2989 | } |
aoqi@0 | 2990 | |
aoqi@0 | 2991 | if (sr_notify(osthread) != 0) { |
aoqi@0 | 2992 | ShouldNotReachHere(); |
aoqi@0 | 2993 | } |
aoqi@0 | 2994 | |
aoqi@0 | 2995 | // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED |
aoqi@0 | 2996 | while (true) { |
aoqi@0 | 2997 | if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { |
aoqi@0 | 2998 | break; |
aoqi@0 | 2999 | } else { |
aoqi@0 | 3000 | // timeout |
aoqi@0 | 3001 | os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); |
aoqi@0 | 3002 | if (cancelled == os::SuspendResume::SR_RUNNING) { |
aoqi@0 | 3003 | return false; |
aoqi@0 | 3004 | } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { |
aoqi@0 | 3005 | // make sure that we consume the signal on the semaphore as well |
aoqi@0 | 3006 | sr_semaphore.wait(); |
aoqi@0 | 3007 | break; |
aoqi@0 | 3008 | } else { |
aoqi@0 | 3009 | ShouldNotReachHere(); |
aoqi@0 | 3010 | return false; |
aoqi@0 | 3011 | } |
aoqi@0 | 3012 | } |
aoqi@0 | 3013 | } |
aoqi@0 | 3014 | |
aoqi@0 | 3015 | guarantee(osthread->sr.is_suspended(), "Must be suspended"); |
aoqi@0 | 3016 | return true; |
aoqi@0 | 3017 | } |
aoqi@0 | 3018 | |
aoqi@0 | 3019 | static void do_resume(OSThread* osthread) { |
aoqi@0 | 3020 | assert(osthread->sr.is_suspended(), "thread should be suspended"); |
aoqi@0 | 3021 | assert(!sr_semaphore.trywait(), "invalid semaphore state"); |
aoqi@0 | 3022 | |
aoqi@0 | 3023 | if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { |
aoqi@0 | 3024 | // failed to switch to WAKEUP_REQUEST |
aoqi@0 | 3025 | ShouldNotReachHere(); |
aoqi@0 | 3026 | return; |
aoqi@0 | 3027 | } |
aoqi@0 | 3028 | |
aoqi@0 | 3029 | while (true) { |
aoqi@0 | 3030 | if (sr_notify(osthread) == 0) { |
aoqi@0 | 3031 | if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { |
aoqi@0 | 3032 | if (osthread->sr.is_running()) { |
aoqi@0 | 3033 | return; |
aoqi@0 | 3034 | } |
aoqi@0 | 3035 | } |
aoqi@0 | 3036 | } else { |
aoqi@0 | 3037 | ShouldNotReachHere(); |
aoqi@0 | 3038 | } |
aoqi@0 | 3039 | } |
aoqi@0 | 3040 | |
aoqi@0 | 3041 | guarantee(osthread->sr.is_running(), "Must be running!"); |
aoqi@0 | 3042 | } |
aoqi@0 | 3043 | |
aoqi@0 | 3044 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 3045 | // interrupt support |
aoqi@0 | 3046 | |
aoqi@0 | 3047 | void os::interrupt(Thread* thread) { |
aoqi@0 | 3048 | assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
aoqi@0 | 3049 | "possibility of dangling Thread pointer"); |
aoqi@0 | 3050 | |
aoqi@0 | 3051 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 3052 | |
aoqi@0 | 3053 | if (!osthread->interrupted()) { |
aoqi@0 | 3054 | osthread->set_interrupted(true); |
aoqi@0 | 3055 | // More than one thread can get here with the same value of osthread, |
aoqi@0 | 3056 | // resulting in multiple notifications. We do, however, want the store |
aoqi@0 | 3057 | // to interrupted() to be visible to other threads before we execute unpark(). |
aoqi@0 | 3058 | OrderAccess::fence(); |
aoqi@0 | 3059 | ParkEvent * const slp = thread->_SleepEvent ; |
aoqi@0 | 3060 | if (slp != NULL) slp->unpark() ; |
aoqi@0 | 3061 | } |
aoqi@0 | 3062 | |
aoqi@0 | 3063 | // For JSR166. Unpark even if interrupt status already was set |
aoqi@0 | 3064 | if (thread->is_Java_thread()) |
aoqi@0 | 3065 | ((JavaThread*)thread)->parker()->unpark(); |
aoqi@0 | 3066 | |
aoqi@0 | 3067 | ParkEvent * ev = thread->_ParkEvent ; |
aoqi@0 | 3068 | if (ev != NULL) ev->unpark() ; |
aoqi@0 | 3069 | |
aoqi@0 | 3070 | } |
aoqi@0 | 3071 | |
aoqi@0 | 3072 | bool os::is_interrupted(Thread* thread, bool clear_interrupted) { |
aoqi@0 | 3073 | assert(Thread::current() == thread || Threads_lock->owned_by_self(), |
aoqi@0 | 3074 | "possibility of dangling Thread pointer"); |
aoqi@0 | 3075 | |
aoqi@0 | 3076 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 3077 | |
aoqi@0 | 3078 | bool interrupted = osthread->interrupted(); |
aoqi@0 | 3079 | |
aoqi@0 | 3080 | if (interrupted && clear_interrupted) { |
aoqi@0 | 3081 | osthread->set_interrupted(false); |
aoqi@0 | 3082 | // consider thread->_SleepEvent->reset() ... optional optimization |
aoqi@0 | 3083 | } |
aoqi@0 | 3084 | |
aoqi@0 | 3085 | return interrupted; |
aoqi@0 | 3086 | } |
aoqi@0 | 3087 | |
aoqi@0 | 3088 | /////////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 3089 | // signal handling (except suspend/resume) |
aoqi@0 | 3090 | |
aoqi@0 | 3091 | // This routine may be used by user applications as a "hook" to catch signals. |
aoqi@0 | 3092 | // The user-defined signal handler must pass unrecognized signals to this |
aoqi@0 | 3093 | // routine, and if it returns true (non-zero), then the signal handler must |
aoqi@0 | 3094 | // return immediately. If the flag "abort_if_unrecognized" is true, then this |
aoqi@0 | 3095 | // routine will never retun false (zero), but instead will execute a VM panic |
aoqi@0 | 3096 | // routine kill the process. |
aoqi@0 | 3097 | // |
aoqi@0 | 3098 | // If this routine returns false, it is OK to call it again. This allows |
aoqi@0 | 3099 | // the user-defined signal handler to perform checks either before or after |
aoqi@0 | 3100 | // the VM performs its own checks. Naturally, the user code would be making |
aoqi@0 | 3101 | // a serious error if it tried to handle an exception (such as a null check |
aoqi@0 | 3102 | // or breakpoint) that the VM was generating for its own correct operation. |
aoqi@0 | 3103 | // |
aoqi@0 | 3104 | // This routine may recognize any of the following kinds of signals: |
aoqi@0 | 3105 | // SIGBUS, SIGSEGV, SIGILL, SIGFPE, SIGQUIT, SIGPIPE, SIGXFSZ, SIGUSR1. |
aoqi@0 | 3106 | // It should be consulted by handlers for any of those signals. |
aoqi@0 | 3107 | // |
aoqi@0 | 3108 | // The caller of this routine must pass in the three arguments supplied |
aoqi@0 | 3109 | // to the function referred to in the "sa_sigaction" (not the "sa_handler") |
aoqi@0 | 3110 | // field of the structure passed to sigaction(). This routine assumes that |
aoqi@0 | 3111 | // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. |
aoqi@0 | 3112 | // |
aoqi@0 | 3113 | // Note that the VM will print warnings if it detects conflicting signal |
aoqi@0 | 3114 | // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". |
aoqi@0 | 3115 | // |
aoqi@0 | 3116 | extern "C" JNIEXPORT int |
aoqi@0 | 3117 | JVM_handle_bsd_signal(int signo, siginfo_t* siginfo, |
aoqi@0 | 3118 | void* ucontext, int abort_if_unrecognized); |
aoqi@0 | 3119 | |
aoqi@0 | 3120 | void signalHandler(int sig, siginfo_t* info, void* uc) { |
aoqi@0 | 3121 | assert(info != NULL && uc != NULL, "it must be old kernel"); |
aoqi@0 | 3122 | int orig_errno = errno; // Preserve errno value over signal handler. |
aoqi@0 | 3123 | JVM_handle_bsd_signal(sig, info, uc, true); |
aoqi@0 | 3124 | errno = orig_errno; |
aoqi@0 | 3125 | } |
aoqi@0 | 3126 | |
aoqi@0 | 3127 | |
aoqi@0 | 3128 | // This boolean allows users to forward their own non-matching signals |
aoqi@0 | 3129 | // to JVM_handle_bsd_signal, harmlessly. |
aoqi@0 | 3130 | bool os::Bsd::signal_handlers_are_installed = false; |
aoqi@0 | 3131 | |
aoqi@0 | 3132 | // For signal-chaining |
aoqi@0 | 3133 | struct sigaction os::Bsd::sigact[MAXSIGNUM]; |
aoqi@0 | 3134 | unsigned int os::Bsd::sigs = 0; |
aoqi@0 | 3135 | bool os::Bsd::libjsig_is_loaded = false; |
aoqi@0 | 3136 | typedef struct sigaction *(*get_signal_t)(int); |
aoqi@0 | 3137 | get_signal_t os::Bsd::get_signal_action = NULL; |
aoqi@0 | 3138 | |
aoqi@0 | 3139 | struct sigaction* os::Bsd::get_chained_signal_action(int sig) { |
aoqi@0 | 3140 | struct sigaction *actp = NULL; |
aoqi@0 | 3141 | |
aoqi@0 | 3142 | if (libjsig_is_loaded) { |
aoqi@0 | 3143 | // Retrieve the old signal handler from libjsig |
aoqi@0 | 3144 | actp = (*get_signal_action)(sig); |
aoqi@0 | 3145 | } |
aoqi@0 | 3146 | if (actp == NULL) { |
aoqi@0 | 3147 | // Retrieve the preinstalled signal handler from jvm |
aoqi@0 | 3148 | actp = get_preinstalled_handler(sig); |
aoqi@0 | 3149 | } |
aoqi@0 | 3150 | |
aoqi@0 | 3151 | return actp; |
aoqi@0 | 3152 | } |
aoqi@0 | 3153 | |
aoqi@0 | 3154 | static bool call_chained_handler(struct sigaction *actp, int sig, |
aoqi@0 | 3155 | siginfo_t *siginfo, void *context) { |
aoqi@0 | 3156 | // Call the old signal handler |
aoqi@0 | 3157 | if (actp->sa_handler == SIG_DFL) { |
aoqi@0 | 3158 | // It's more reasonable to let jvm treat it as an unexpected exception |
aoqi@0 | 3159 | // instead of taking the default action. |
aoqi@0 | 3160 | return false; |
aoqi@0 | 3161 | } else if (actp->sa_handler != SIG_IGN) { |
aoqi@0 | 3162 | if ((actp->sa_flags & SA_NODEFER) == 0) { |
aoqi@0 | 3163 | // automaticlly block the signal |
aoqi@0 | 3164 | sigaddset(&(actp->sa_mask), sig); |
aoqi@0 | 3165 | } |
aoqi@0 | 3166 | |
aoqi@0 | 3167 | sa_handler_t hand; |
aoqi@0 | 3168 | sa_sigaction_t sa; |
aoqi@0 | 3169 | bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; |
aoqi@0 | 3170 | // retrieve the chained handler |
aoqi@0 | 3171 | if (siginfo_flag_set) { |
aoqi@0 | 3172 | sa = actp->sa_sigaction; |
aoqi@0 | 3173 | } else { |
aoqi@0 | 3174 | hand = actp->sa_handler; |
aoqi@0 | 3175 | } |
aoqi@0 | 3176 | |
aoqi@0 | 3177 | if ((actp->sa_flags & SA_RESETHAND) != 0) { |
aoqi@0 | 3178 | actp->sa_handler = SIG_DFL; |
aoqi@0 | 3179 | } |
aoqi@0 | 3180 | |
aoqi@0 | 3181 | // try to honor the signal mask |
aoqi@0 | 3182 | sigset_t oset; |
aoqi@0 | 3183 | pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); |
aoqi@0 | 3184 | |
aoqi@0 | 3185 | // call into the chained handler |
aoqi@0 | 3186 | if (siginfo_flag_set) { |
aoqi@0 | 3187 | (*sa)(sig, siginfo, context); |
aoqi@0 | 3188 | } else { |
aoqi@0 | 3189 | (*hand)(sig); |
aoqi@0 | 3190 | } |
aoqi@0 | 3191 | |
aoqi@0 | 3192 | // restore the signal mask |
aoqi@0 | 3193 | pthread_sigmask(SIG_SETMASK, &oset, 0); |
aoqi@0 | 3194 | } |
aoqi@0 | 3195 | // Tell jvm's signal handler the signal is taken care of. |
aoqi@0 | 3196 | return true; |
aoqi@0 | 3197 | } |
aoqi@0 | 3198 | |
aoqi@0 | 3199 | bool os::Bsd::chained_handler(int sig, siginfo_t* siginfo, void* context) { |
aoqi@0 | 3200 | bool chained = false; |
aoqi@0 | 3201 | // signal-chaining |
aoqi@0 | 3202 | if (UseSignalChaining) { |
aoqi@0 | 3203 | struct sigaction *actp = get_chained_signal_action(sig); |
aoqi@0 | 3204 | if (actp != NULL) { |
aoqi@0 | 3205 | chained = call_chained_handler(actp, sig, siginfo, context); |
aoqi@0 | 3206 | } |
aoqi@0 | 3207 | } |
aoqi@0 | 3208 | return chained; |
aoqi@0 | 3209 | } |
aoqi@0 | 3210 | |
aoqi@0 | 3211 | struct sigaction* os::Bsd::get_preinstalled_handler(int sig) { |
aoqi@0 | 3212 | if ((( (unsigned int)1 << sig ) & sigs) != 0) { |
aoqi@0 | 3213 | return &sigact[sig]; |
aoqi@0 | 3214 | } |
aoqi@0 | 3215 | return NULL; |
aoqi@0 | 3216 | } |
aoqi@0 | 3217 | |
aoqi@0 | 3218 | void os::Bsd::save_preinstalled_handler(int sig, struct sigaction& oldAct) { |
aoqi@0 | 3219 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3220 | sigact[sig] = oldAct; |
aoqi@0 | 3221 | sigs |= (unsigned int)1 << sig; |
aoqi@0 | 3222 | } |
aoqi@0 | 3223 | |
aoqi@0 | 3224 | // for diagnostic |
aoqi@0 | 3225 | int os::Bsd::sigflags[MAXSIGNUM]; |
aoqi@0 | 3226 | |
aoqi@0 | 3227 | int os::Bsd::get_our_sigflags(int sig) { |
aoqi@0 | 3228 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3229 | return sigflags[sig]; |
aoqi@0 | 3230 | } |
aoqi@0 | 3231 | |
aoqi@0 | 3232 | void os::Bsd::set_our_sigflags(int sig, int flags) { |
aoqi@0 | 3233 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3234 | sigflags[sig] = flags; |
aoqi@0 | 3235 | } |
aoqi@0 | 3236 | |
aoqi@0 | 3237 | void os::Bsd::set_signal_handler(int sig, bool set_installed) { |
aoqi@0 | 3238 | // Check for overwrite. |
aoqi@0 | 3239 | struct sigaction oldAct; |
aoqi@0 | 3240 | sigaction(sig, (struct sigaction*)NULL, &oldAct); |
aoqi@0 | 3241 | |
aoqi@0 | 3242 | void* oldhand = oldAct.sa_sigaction |
aoqi@0 | 3243 | ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
aoqi@0 | 3244 | : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
aoqi@0 | 3245 | if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && |
aoqi@0 | 3246 | oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && |
aoqi@0 | 3247 | oldhand != CAST_FROM_FN_PTR(void*, (sa_sigaction_t)signalHandler)) { |
aoqi@0 | 3248 | if (AllowUserSignalHandlers || !set_installed) { |
aoqi@0 | 3249 | // Do not overwrite; user takes responsibility to forward to us. |
aoqi@0 | 3250 | return; |
aoqi@0 | 3251 | } else if (UseSignalChaining) { |
aoqi@0 | 3252 | // save the old handler in jvm |
aoqi@0 | 3253 | save_preinstalled_handler(sig, oldAct); |
aoqi@0 | 3254 | // libjsig also interposes the sigaction() call below and saves the |
aoqi@0 | 3255 | // old sigaction on it own. |
aoqi@0 | 3256 | } else { |
aoqi@0 | 3257 | fatal(err_msg("Encountered unexpected pre-existing sigaction handler " |
aoqi@0 | 3258 | "%#lx for signal %d.", (long)oldhand, sig)); |
aoqi@0 | 3259 | } |
aoqi@0 | 3260 | } |
aoqi@0 | 3261 | |
aoqi@0 | 3262 | struct sigaction sigAct; |
aoqi@0 | 3263 | sigfillset(&(sigAct.sa_mask)); |
aoqi@0 | 3264 | sigAct.sa_handler = SIG_DFL; |
aoqi@0 | 3265 | if (!set_installed) { |
aoqi@0 | 3266 | sigAct.sa_flags = SA_SIGINFO|SA_RESTART; |
aoqi@0 | 3267 | } else { |
aoqi@0 | 3268 | sigAct.sa_sigaction = signalHandler; |
aoqi@0 | 3269 | sigAct.sa_flags = SA_SIGINFO|SA_RESTART; |
aoqi@0 | 3270 | } |
aoqi@0 | 3271 | #ifdef __APPLE__ |
aoqi@0 | 3272 | // Needed for main thread as XNU (Mac OS X kernel) will only deliver SIGSEGV |
aoqi@0 | 3273 | // (which starts as SIGBUS) on main thread with faulting address inside "stack+guard pages" |
aoqi@0 | 3274 | // if the signal handler declares it will handle it on alternate stack. |
aoqi@0 | 3275 | // Notice we only declare we will handle it on alt stack, but we are not |
aoqi@0 | 3276 | // actually going to use real alt stack - this is just a workaround. |
aoqi@0 | 3277 | // Please see ux_exception.c, method catch_mach_exception_raise for details |
aoqi@0 | 3278 | // link http://www.opensource.apple.com/source/xnu/xnu-2050.18.24/bsd/uxkern/ux_exception.c |
aoqi@0 | 3279 | if (sig == SIGSEGV) { |
aoqi@0 | 3280 | sigAct.sa_flags |= SA_ONSTACK; |
aoqi@0 | 3281 | } |
aoqi@0 | 3282 | #endif |
aoqi@0 | 3283 | |
aoqi@0 | 3284 | // Save flags, which are set by ours |
aoqi@0 | 3285 | assert(sig > 0 && sig < MAXSIGNUM, "vm signal out of expected range"); |
aoqi@0 | 3286 | sigflags[sig] = sigAct.sa_flags; |
aoqi@0 | 3287 | |
aoqi@0 | 3288 | int ret = sigaction(sig, &sigAct, &oldAct); |
aoqi@0 | 3289 | assert(ret == 0, "check"); |
aoqi@0 | 3290 | |
aoqi@0 | 3291 | void* oldhand2 = oldAct.sa_sigaction |
aoqi@0 | 3292 | ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) |
aoqi@0 | 3293 | : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); |
aoqi@0 | 3294 | assert(oldhand2 == oldhand, "no concurrent signal handler installation"); |
aoqi@0 | 3295 | } |
aoqi@0 | 3296 | |
aoqi@0 | 3297 | // install signal handlers for signals that HotSpot needs to |
aoqi@0 | 3298 | // handle in order to support Java-level exception handling. |
aoqi@0 | 3299 | |
aoqi@0 | 3300 | void os::Bsd::install_signal_handlers() { |
aoqi@0 | 3301 | if (!signal_handlers_are_installed) { |
aoqi@0 | 3302 | signal_handlers_are_installed = true; |
aoqi@0 | 3303 | |
aoqi@0 | 3304 | // signal-chaining |
aoqi@0 | 3305 | typedef void (*signal_setting_t)(); |
aoqi@0 | 3306 | signal_setting_t begin_signal_setting = NULL; |
aoqi@0 | 3307 | signal_setting_t end_signal_setting = NULL; |
aoqi@0 | 3308 | begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
aoqi@0 | 3309 | dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); |
aoqi@0 | 3310 | if (begin_signal_setting != NULL) { |
aoqi@0 | 3311 | end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, |
aoqi@0 | 3312 | dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); |
aoqi@0 | 3313 | get_signal_action = CAST_TO_FN_PTR(get_signal_t, |
aoqi@0 | 3314 | dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); |
aoqi@0 | 3315 | libjsig_is_loaded = true; |
aoqi@0 | 3316 | assert(UseSignalChaining, "should enable signal-chaining"); |
aoqi@0 | 3317 | } |
aoqi@0 | 3318 | if (libjsig_is_loaded) { |
aoqi@0 | 3319 | // Tell libjsig jvm is setting signal handlers |
aoqi@0 | 3320 | (*begin_signal_setting)(); |
aoqi@0 | 3321 | } |
aoqi@0 | 3322 | |
aoqi@0 | 3323 | set_signal_handler(SIGSEGV, true); |
aoqi@0 | 3324 | set_signal_handler(SIGPIPE, true); |
aoqi@0 | 3325 | set_signal_handler(SIGBUS, true); |
aoqi@0 | 3326 | set_signal_handler(SIGILL, true); |
aoqi@0 | 3327 | set_signal_handler(SIGFPE, true); |
aoqi@0 | 3328 | set_signal_handler(SIGXFSZ, true); |
aoqi@0 | 3329 | |
aoqi@0 | 3330 | #if defined(__APPLE__) |
aoqi@0 | 3331 | // In Mac OS X 10.4, CrashReporter will write a crash log for all 'fatal' signals, including |
aoqi@0 | 3332 | // signals caught and handled by the JVM. To work around this, we reset the mach task |
aoqi@0 | 3333 | // signal handler that's placed on our process by CrashReporter. This disables |
aoqi@0 | 3334 | // CrashReporter-based reporting. |
aoqi@0 | 3335 | // |
aoqi@0 | 3336 | // This work-around is not necessary for 10.5+, as CrashReporter no longer intercedes |
aoqi@0 | 3337 | // on caught fatal signals. |
aoqi@0 | 3338 | // |
aoqi@0 | 3339 | // Additionally, gdb installs both standard BSD signal handlers, and mach exception |
aoqi@0 | 3340 | // handlers. By replacing the existing task exception handler, we disable gdb's mach |
aoqi@0 | 3341 | // exception handling, while leaving the standard BSD signal handlers functional. |
aoqi@0 | 3342 | kern_return_t kr; |
aoqi@0 | 3343 | kr = task_set_exception_ports(mach_task_self(), |
aoqi@0 | 3344 | EXC_MASK_BAD_ACCESS | EXC_MASK_ARITHMETIC, |
aoqi@0 | 3345 | MACH_PORT_NULL, |
aoqi@0 | 3346 | EXCEPTION_STATE_IDENTITY, |
aoqi@0 | 3347 | MACHINE_THREAD_STATE); |
aoqi@0 | 3348 | |
aoqi@0 | 3349 | assert(kr == KERN_SUCCESS, "could not set mach task signal handler"); |
aoqi@0 | 3350 | #endif |
aoqi@0 | 3351 | |
aoqi@0 | 3352 | if (libjsig_is_loaded) { |
aoqi@0 | 3353 | // Tell libjsig jvm finishes setting signal handlers |
aoqi@0 | 3354 | (*end_signal_setting)(); |
aoqi@0 | 3355 | } |
aoqi@0 | 3356 | |
aoqi@0 | 3357 | // We don't activate signal checker if libjsig is in place, we trust ourselves |
aoqi@0 | 3358 | // and if UserSignalHandler is installed all bets are off |
aoqi@0 | 3359 | if (CheckJNICalls) { |
aoqi@0 | 3360 | if (libjsig_is_loaded) { |
aoqi@0 | 3361 | if (PrintJNIResolving) { |
aoqi@0 | 3362 | tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); |
aoqi@0 | 3363 | } |
aoqi@0 | 3364 | check_signals = false; |
aoqi@0 | 3365 | } |
aoqi@0 | 3366 | if (AllowUserSignalHandlers) { |
aoqi@0 | 3367 | if (PrintJNIResolving) { |
aoqi@0 | 3368 | tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); |
aoqi@0 | 3369 | } |
aoqi@0 | 3370 | check_signals = false; |
aoqi@0 | 3371 | } |
aoqi@0 | 3372 | } |
aoqi@0 | 3373 | } |
aoqi@0 | 3374 | } |
aoqi@0 | 3375 | |
aoqi@0 | 3376 | |
aoqi@0 | 3377 | ///// |
aoqi@0 | 3378 | // glibc on Bsd platform uses non-documented flag |
aoqi@0 | 3379 | // to indicate, that some special sort of signal |
aoqi@0 | 3380 | // trampoline is used. |
aoqi@0 | 3381 | // We will never set this flag, and we should |
aoqi@0 | 3382 | // ignore this flag in our diagnostic |
aoqi@0 | 3383 | #ifdef SIGNIFICANT_SIGNAL_MASK |
aoqi@0 | 3384 | #undef SIGNIFICANT_SIGNAL_MASK |
aoqi@0 | 3385 | #endif |
aoqi@0 | 3386 | #define SIGNIFICANT_SIGNAL_MASK (~0x04000000) |
aoqi@0 | 3387 | |
aoqi@0 | 3388 | static const char* get_signal_handler_name(address handler, |
aoqi@0 | 3389 | char* buf, int buflen) { |
aoqi@0 | 3390 | int offset; |
aoqi@0 | 3391 | bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); |
aoqi@0 | 3392 | if (found) { |
aoqi@0 | 3393 | // skip directory names |
aoqi@0 | 3394 | const char *p1, *p2; |
aoqi@0 | 3395 | p1 = buf; |
aoqi@0 | 3396 | size_t len = strlen(os::file_separator()); |
aoqi@0 | 3397 | while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; |
aoqi@0 | 3398 | jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); |
aoqi@0 | 3399 | } else { |
aoqi@0 | 3400 | jio_snprintf(buf, buflen, PTR_FORMAT, handler); |
aoqi@0 | 3401 | } |
aoqi@0 | 3402 | return buf; |
aoqi@0 | 3403 | } |
aoqi@0 | 3404 | |
aoqi@0 | 3405 | static void print_signal_handler(outputStream* st, int sig, |
aoqi@0 | 3406 | char* buf, size_t buflen) { |
aoqi@0 | 3407 | struct sigaction sa; |
aoqi@0 | 3408 | |
aoqi@0 | 3409 | sigaction(sig, NULL, &sa); |
aoqi@0 | 3410 | |
aoqi@0 | 3411 | // See comment for SIGNIFICANT_SIGNAL_MASK define |
aoqi@0 | 3412 | sa.sa_flags &= SIGNIFICANT_SIGNAL_MASK; |
aoqi@0 | 3413 | |
aoqi@0 | 3414 | st->print("%s: ", os::exception_name(sig, buf, buflen)); |
aoqi@0 | 3415 | |
aoqi@0 | 3416 | address handler = (sa.sa_flags & SA_SIGINFO) |
aoqi@0 | 3417 | ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) |
aoqi@0 | 3418 | : CAST_FROM_FN_PTR(address, sa.sa_handler); |
aoqi@0 | 3419 | |
aoqi@0 | 3420 | if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { |
aoqi@0 | 3421 | st->print("SIG_DFL"); |
aoqi@0 | 3422 | } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { |
aoqi@0 | 3423 | st->print("SIG_IGN"); |
aoqi@0 | 3424 | } else { |
aoqi@0 | 3425 | st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); |
aoqi@0 | 3426 | } |
aoqi@0 | 3427 | |
aoqi@0 | 3428 | st->print(", sa_mask[0]="); |
aoqi@0 | 3429 | os::Posix::print_signal_set_short(st, &sa.sa_mask); |
aoqi@0 | 3430 | |
aoqi@0 | 3431 | address rh = VMError::get_resetted_sighandler(sig); |
aoqi@0 | 3432 | // May be, handler was resetted by VMError? |
aoqi@0 | 3433 | if(rh != NULL) { |
aoqi@0 | 3434 | handler = rh; |
aoqi@0 | 3435 | sa.sa_flags = VMError::get_resetted_sigflags(sig) & SIGNIFICANT_SIGNAL_MASK; |
aoqi@0 | 3436 | } |
aoqi@0 | 3437 | |
aoqi@0 | 3438 | st->print(", sa_flags="); |
aoqi@0 | 3439 | os::Posix::print_sa_flags(st, sa.sa_flags); |
aoqi@0 | 3440 | |
aoqi@0 | 3441 | // Check: is it our handler? |
aoqi@0 | 3442 | if(handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler) || |
aoqi@0 | 3443 | handler == CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler)) { |
aoqi@0 | 3444 | // It is our signal handler |
aoqi@0 | 3445 | // check for flags, reset system-used one! |
aoqi@0 | 3446 | if((int)sa.sa_flags != os::Bsd::get_our_sigflags(sig)) { |
aoqi@0 | 3447 | st->print( |
aoqi@0 | 3448 | ", flags was changed from " PTR32_FORMAT ", consider using jsig library", |
aoqi@0 | 3449 | os::Bsd::get_our_sigflags(sig)); |
aoqi@0 | 3450 | } |
aoqi@0 | 3451 | } |
aoqi@0 | 3452 | st->cr(); |
aoqi@0 | 3453 | } |
aoqi@0 | 3454 | |
aoqi@0 | 3455 | |
aoqi@0 | 3456 | #define DO_SIGNAL_CHECK(sig) \ |
aoqi@0 | 3457 | if (!sigismember(&check_signal_done, sig)) \ |
aoqi@0 | 3458 | os::Bsd::check_signal_handler(sig) |
aoqi@0 | 3459 | |
aoqi@0 | 3460 | // This method is a periodic task to check for misbehaving JNI applications |
aoqi@0 | 3461 | // under CheckJNI, we can add any periodic checks here |
aoqi@0 | 3462 | |
aoqi@0 | 3463 | void os::run_periodic_checks() { |
aoqi@0 | 3464 | |
aoqi@0 | 3465 | if (check_signals == false) return; |
aoqi@0 | 3466 | |
aoqi@0 | 3467 | // SEGV and BUS if overridden could potentially prevent |
aoqi@0 | 3468 | // generation of hs*.log in the event of a crash, debugging |
aoqi@0 | 3469 | // such a case can be very challenging, so we absolutely |
aoqi@0 | 3470 | // check the following for a good measure: |
aoqi@0 | 3471 | DO_SIGNAL_CHECK(SIGSEGV); |
aoqi@0 | 3472 | DO_SIGNAL_CHECK(SIGILL); |
aoqi@0 | 3473 | DO_SIGNAL_CHECK(SIGFPE); |
aoqi@0 | 3474 | DO_SIGNAL_CHECK(SIGBUS); |
aoqi@0 | 3475 | DO_SIGNAL_CHECK(SIGPIPE); |
aoqi@0 | 3476 | DO_SIGNAL_CHECK(SIGXFSZ); |
aoqi@0 | 3477 | |
aoqi@0 | 3478 | |
aoqi@0 | 3479 | // ReduceSignalUsage allows the user to override these handlers |
aoqi@0 | 3480 | // see comments at the very top and jvm_solaris.h |
aoqi@0 | 3481 | if (!ReduceSignalUsage) { |
aoqi@0 | 3482 | DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); |
aoqi@0 | 3483 | DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); |
aoqi@0 | 3484 | DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); |
aoqi@0 | 3485 | DO_SIGNAL_CHECK(BREAK_SIGNAL); |
aoqi@0 | 3486 | } |
aoqi@0 | 3487 | |
aoqi@0 | 3488 | DO_SIGNAL_CHECK(SR_signum); |
aoqi@0 | 3489 | DO_SIGNAL_CHECK(INTERRUPT_SIGNAL); |
aoqi@0 | 3490 | } |
aoqi@0 | 3491 | |
aoqi@0 | 3492 | typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); |
aoqi@0 | 3493 | |
aoqi@0 | 3494 | static os_sigaction_t os_sigaction = NULL; |
aoqi@0 | 3495 | |
aoqi@0 | 3496 | void os::Bsd::check_signal_handler(int sig) { |
aoqi@0 | 3497 | char buf[O_BUFLEN]; |
aoqi@0 | 3498 | address jvmHandler = NULL; |
aoqi@0 | 3499 | |
aoqi@0 | 3500 | |
aoqi@0 | 3501 | struct sigaction act; |
aoqi@0 | 3502 | if (os_sigaction == NULL) { |
aoqi@0 | 3503 | // only trust the default sigaction, in case it has been interposed |
aoqi@0 | 3504 | os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); |
aoqi@0 | 3505 | if (os_sigaction == NULL) return; |
aoqi@0 | 3506 | } |
aoqi@0 | 3507 | |
aoqi@0 | 3508 | os_sigaction(sig, (struct sigaction*)NULL, &act); |
aoqi@0 | 3509 | |
aoqi@0 | 3510 | |
aoqi@0 | 3511 | act.sa_flags &= SIGNIFICANT_SIGNAL_MASK; |
aoqi@0 | 3512 | |
aoqi@0 | 3513 | address thisHandler = (act.sa_flags & SA_SIGINFO) |
aoqi@0 | 3514 | ? CAST_FROM_FN_PTR(address, act.sa_sigaction) |
aoqi@0 | 3515 | : CAST_FROM_FN_PTR(address, act.sa_handler) ; |
aoqi@0 | 3516 | |
aoqi@0 | 3517 | |
aoqi@0 | 3518 | switch(sig) { |
aoqi@0 | 3519 | case SIGSEGV: |
aoqi@0 | 3520 | case SIGBUS: |
aoqi@0 | 3521 | case SIGFPE: |
aoqi@0 | 3522 | case SIGPIPE: |
aoqi@0 | 3523 | case SIGILL: |
aoqi@0 | 3524 | case SIGXFSZ: |
aoqi@0 | 3525 | jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)signalHandler); |
aoqi@0 | 3526 | break; |
aoqi@0 | 3527 | |
aoqi@0 | 3528 | case SHUTDOWN1_SIGNAL: |
aoqi@0 | 3529 | case SHUTDOWN2_SIGNAL: |
aoqi@0 | 3530 | case SHUTDOWN3_SIGNAL: |
aoqi@0 | 3531 | case BREAK_SIGNAL: |
aoqi@0 | 3532 | jvmHandler = (address)user_handler(); |
aoqi@0 | 3533 | break; |
aoqi@0 | 3534 | |
aoqi@0 | 3535 | case INTERRUPT_SIGNAL: |
aoqi@0 | 3536 | jvmHandler = CAST_FROM_FN_PTR(address, SIG_DFL); |
aoqi@0 | 3537 | break; |
aoqi@0 | 3538 | |
aoqi@0 | 3539 | default: |
aoqi@0 | 3540 | if (sig == SR_signum) { |
aoqi@0 | 3541 | jvmHandler = CAST_FROM_FN_PTR(address, (sa_sigaction_t)SR_handler); |
aoqi@0 | 3542 | } else { |
aoqi@0 | 3543 | return; |
aoqi@0 | 3544 | } |
aoqi@0 | 3545 | break; |
aoqi@0 | 3546 | } |
aoqi@0 | 3547 | |
aoqi@0 | 3548 | if (thisHandler != jvmHandler) { |
aoqi@0 | 3549 | tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); |
aoqi@0 | 3550 | tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); |
aoqi@0 | 3551 | tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); |
aoqi@0 | 3552 | // No need to check this sig any longer |
aoqi@0 | 3553 | sigaddset(&check_signal_done, sig); |
minqi@7824 | 3554 | // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN |
minqi@7824 | 3555 | if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { |
minqi@7824 | 3556 | tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", |
minqi@7824 | 3557 | exception_name(sig, buf, O_BUFLEN)); |
minqi@7824 | 3558 | } |
aoqi@0 | 3559 | } else if(os::Bsd::get_our_sigflags(sig) != 0 && (int)act.sa_flags != os::Bsd::get_our_sigflags(sig)) { |
aoqi@0 | 3560 | tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); |
aoqi@0 | 3561 | tty->print("expected:" PTR32_FORMAT, os::Bsd::get_our_sigflags(sig)); |
aoqi@0 | 3562 | tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); |
aoqi@0 | 3563 | // No need to check this sig any longer |
aoqi@0 | 3564 | sigaddset(&check_signal_done, sig); |
aoqi@0 | 3565 | } |
aoqi@0 | 3566 | |
aoqi@0 | 3567 | // Dump all the signal |
aoqi@0 | 3568 | if (sigismember(&check_signal_done, sig)) { |
aoqi@0 | 3569 | print_signal_handlers(tty, buf, O_BUFLEN); |
aoqi@0 | 3570 | } |
aoqi@0 | 3571 | } |
aoqi@0 | 3572 | |
aoqi@0 | 3573 | extern void report_error(char* file_name, int line_no, char* title, char* format, ...); |
aoqi@0 | 3574 | |
aoqi@0 | 3575 | extern bool signal_name(int signo, char* buf, size_t len); |
aoqi@0 | 3576 | |
aoqi@0 | 3577 | const char* os::exception_name(int exception_code, char* buf, size_t size) { |
aoqi@0 | 3578 | if (0 < exception_code && exception_code <= SIGRTMAX) { |
aoqi@0 | 3579 | // signal |
aoqi@0 | 3580 | if (!signal_name(exception_code, buf, size)) { |
aoqi@0 | 3581 | jio_snprintf(buf, size, "SIG%d", exception_code); |
aoqi@0 | 3582 | } |
aoqi@0 | 3583 | return buf; |
aoqi@0 | 3584 | } else { |
aoqi@0 | 3585 | return NULL; |
aoqi@0 | 3586 | } |
aoqi@0 | 3587 | } |
aoqi@0 | 3588 | |
aoqi@0 | 3589 | // this is called _before_ the most of global arguments have been parsed |
aoqi@0 | 3590 | void os::init(void) { |
aoqi@0 | 3591 | char dummy; /* used to get a guess on initial stack address */ |
aoqi@0 | 3592 | // first_hrtime = gethrtime(); |
aoqi@0 | 3593 | |
aoqi@0 | 3594 | // With BsdThreads the JavaMain thread pid (primordial thread) |
aoqi@0 | 3595 | // is different than the pid of the java launcher thread. |
aoqi@0 | 3596 | // So, on Bsd, the launcher thread pid is passed to the VM |
aoqi@0 | 3597 | // via the sun.java.launcher.pid property. |
aoqi@0 | 3598 | // Use this property instead of getpid() if it was correctly passed. |
aoqi@0 | 3599 | // See bug 6351349. |
aoqi@0 | 3600 | pid_t java_launcher_pid = (pid_t) Arguments::sun_java_launcher_pid(); |
aoqi@0 | 3601 | |
aoqi@0 | 3602 | _initial_pid = (java_launcher_pid > 0) ? java_launcher_pid : getpid(); |
aoqi@0 | 3603 | |
aoqi@0 | 3604 | clock_tics_per_sec = CLK_TCK; |
aoqi@0 | 3605 | |
aoqi@0 | 3606 | init_random(1234567); |
aoqi@0 | 3607 | |
aoqi@0 | 3608 | ThreadCritical::initialize(); |
aoqi@0 | 3609 | |
aoqi@0 | 3610 | Bsd::set_page_size(getpagesize()); |
aoqi@0 | 3611 | if (Bsd::page_size() == -1) { |
aoqi@0 | 3612 | fatal(err_msg("os_bsd.cpp: os::init: sysconf failed (%s)", |
aoqi@0 | 3613 | strerror(errno))); |
aoqi@0 | 3614 | } |
aoqi@0 | 3615 | init_page_sizes((size_t) Bsd::page_size()); |
aoqi@0 | 3616 | |
aoqi@0 | 3617 | Bsd::initialize_system_info(); |
aoqi@0 | 3618 | |
aoqi@0 | 3619 | // main_thread points to the aboriginal thread |
aoqi@0 | 3620 | Bsd::_main_thread = pthread_self(); |
aoqi@0 | 3621 | |
aoqi@0 | 3622 | Bsd::clock_init(); |
aoqi@0 | 3623 | initial_time_count = javaTimeNanos(); |
aoqi@0 | 3624 | |
aoqi@0 | 3625 | #ifdef __APPLE__ |
aoqi@0 | 3626 | // XXXDARWIN |
aoqi@0 | 3627 | // Work around the unaligned VM callbacks in hotspot's |
aoqi@0 | 3628 | // sharedRuntime. The callbacks don't use SSE2 instructions, and work on |
aoqi@0 | 3629 | // Linux, Solaris, and FreeBSD. On Mac OS X, dyld (rightly so) enforces |
aoqi@0 | 3630 | // alignment when doing symbol lookup. To work around this, we force early |
aoqi@0 | 3631 | // binding of all symbols now, thus binding when alignment is known-good. |
aoqi@0 | 3632 | _dyld_bind_fully_image_containing_address((const void *) &os::init); |
aoqi@0 | 3633 | #endif |
aoqi@0 | 3634 | } |
aoqi@0 | 3635 | |
aoqi@0 | 3636 | // To install functions for atexit system call |
aoqi@0 | 3637 | extern "C" { |
aoqi@0 | 3638 | static void perfMemory_exit_helper() { |
aoqi@0 | 3639 | perfMemory_exit(); |
aoqi@0 | 3640 | } |
aoqi@0 | 3641 | } |
aoqi@0 | 3642 | |
aoqi@0 | 3643 | // this is called _after_ the global arguments have been parsed |
aoqi@0 | 3644 | jint os::init_2(void) |
aoqi@0 | 3645 | { |
aoqi@0 | 3646 | // Allocate a single page and mark it as readable for safepoint polling |
aoqi@0 | 3647 | address polling_page = (address) ::mmap(NULL, Bsd::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
aoqi@0 | 3648 | guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" ); |
aoqi@0 | 3649 | |
aoqi@0 | 3650 | os::set_polling_page( polling_page ); |
aoqi@0 | 3651 | |
aoqi@0 | 3652 | #ifndef PRODUCT |
aoqi@0 | 3653 | if(Verbose && PrintMiscellaneous) |
aoqi@0 | 3654 | tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); |
aoqi@0 | 3655 | #endif |
aoqi@0 | 3656 | |
aoqi@0 | 3657 | if (!UseMembar) { |
aoqi@0 | 3658 | address mem_serialize_page = (address) ::mmap(NULL, Bsd::page_size(), PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); |
aoqi@0 | 3659 | guarantee( mem_serialize_page != MAP_FAILED, "mmap Failed for memory serialize page"); |
aoqi@0 | 3660 | os::set_memory_serialize_page( mem_serialize_page ); |
aoqi@0 | 3661 | |
aoqi@0 | 3662 | #ifndef PRODUCT |
aoqi@0 | 3663 | if(Verbose && PrintMiscellaneous) |
aoqi@0 | 3664 | tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); |
aoqi@0 | 3665 | #endif |
aoqi@0 | 3666 | } |
aoqi@0 | 3667 | |
aoqi@0 | 3668 | // initialize suspend/resume support - must do this before signal_sets_init() |
aoqi@0 | 3669 | if (SR_initialize() != 0) { |
aoqi@0 | 3670 | perror("SR_initialize failed"); |
aoqi@0 | 3671 | return JNI_ERR; |
aoqi@0 | 3672 | } |
aoqi@0 | 3673 | |
aoqi@0 | 3674 | Bsd::signal_sets_init(); |
aoqi@0 | 3675 | Bsd::install_signal_handlers(); |
aoqi@0 | 3676 | |
aoqi@0 | 3677 | // Check minimum allowable stack size for thread creation and to initialize |
aoqi@0 | 3678 | // the java system classes, including StackOverflowError - depends on page |
aoqi@0 | 3679 | // size. Add a page for compiler2 recursion in main thread. |
aoqi@0 | 3680 | // Add in 2*BytesPerWord times page size to account for VM stack during |
aoqi@0 | 3681 | // class initialization depending on 32 or 64 bit VM. |
aoqi@0 | 3682 | os::Bsd::min_stack_allowed = MAX2(os::Bsd::min_stack_allowed, |
aoqi@0 | 3683 | (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ |
aoqi@0 | 3684 | 2*BytesPerWord COMPILER2_PRESENT(+1)) * Bsd::page_size()); |
aoqi@0 | 3685 | |
aoqi@0 | 3686 | size_t threadStackSizeInBytes = ThreadStackSize * K; |
aoqi@0 | 3687 | if (threadStackSizeInBytes != 0 && |
aoqi@0 | 3688 | threadStackSizeInBytes < os::Bsd::min_stack_allowed) { |
aoqi@0 | 3689 | tty->print_cr("\nThe stack size specified is too small, " |
aoqi@0 | 3690 | "Specify at least %dk", |
aoqi@0 | 3691 | os::Bsd::min_stack_allowed/ K); |
aoqi@0 | 3692 | return JNI_ERR; |
aoqi@0 | 3693 | } |
aoqi@0 | 3694 | |
aoqi@0 | 3695 | // Make the stack size a multiple of the page size so that |
aoqi@0 | 3696 | // the yellow/red zones can be guarded. |
aoqi@0 | 3697 | JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, |
aoqi@0 | 3698 | vm_page_size())); |
aoqi@0 | 3699 | |
aoqi@0 | 3700 | if (MaxFDLimit) { |
aoqi@0 | 3701 | // set the number of file descriptors to max. print out error |
aoqi@0 | 3702 | // if getrlimit/setrlimit fails but continue regardless. |
aoqi@0 | 3703 | struct rlimit nbr_files; |
aoqi@0 | 3704 | int status = getrlimit(RLIMIT_NOFILE, &nbr_files); |
aoqi@0 | 3705 | if (status != 0) { |
aoqi@0 | 3706 | if (PrintMiscellaneous && (Verbose || WizardMode)) |
aoqi@0 | 3707 | perror("os::init_2 getrlimit failed"); |
aoqi@0 | 3708 | } else { |
aoqi@0 | 3709 | nbr_files.rlim_cur = nbr_files.rlim_max; |
aoqi@0 | 3710 | |
aoqi@0 | 3711 | #ifdef __APPLE__ |
aoqi@0 | 3712 | // Darwin returns RLIM_INFINITY for rlim_max, but fails with EINVAL if |
aoqi@0 | 3713 | // you attempt to use RLIM_INFINITY. As per setrlimit(2), OPEN_MAX must |
aoqi@0 | 3714 | // be used instead |
aoqi@0 | 3715 | nbr_files.rlim_cur = MIN(OPEN_MAX, nbr_files.rlim_cur); |
aoqi@0 | 3716 | #endif |
aoqi@0 | 3717 | |
aoqi@0 | 3718 | status = setrlimit(RLIMIT_NOFILE, &nbr_files); |
aoqi@0 | 3719 | if (status != 0) { |
aoqi@0 | 3720 | if (PrintMiscellaneous && (Verbose || WizardMode)) |
aoqi@0 | 3721 | perror("os::init_2 setrlimit failed"); |
aoqi@0 | 3722 | } |
aoqi@0 | 3723 | } |
aoqi@0 | 3724 | } |
aoqi@0 | 3725 | |
aoqi@0 | 3726 | // at-exit methods are called in the reverse order of their registration. |
aoqi@0 | 3727 | // atexit functions are called on return from main or as a result of a |
aoqi@0 | 3728 | // call to exit(3C). There can be only 32 of these functions registered |
aoqi@0 | 3729 | // and atexit() does not set errno. |
aoqi@0 | 3730 | |
aoqi@0 | 3731 | if (PerfAllowAtExitRegistration) { |
aoqi@0 | 3732 | // only register atexit functions if PerfAllowAtExitRegistration is set. |
aoqi@0 | 3733 | // atexit functions can be delayed until process exit time, which |
aoqi@0 | 3734 | // can be problematic for embedded VM situations. Embedded VMs should |
aoqi@0 | 3735 | // call DestroyJavaVM() to assure that VM resources are released. |
aoqi@0 | 3736 | |
aoqi@0 | 3737 | // note: perfMemory_exit_helper atexit function may be removed in |
aoqi@0 | 3738 | // the future if the appropriate cleanup code can be added to the |
aoqi@0 | 3739 | // VM_Exit VMOperation's doit method. |
aoqi@0 | 3740 | if (atexit(perfMemory_exit_helper) != 0) { |
aoqi@0 | 3741 | warning("os::init2 atexit(perfMemory_exit_helper) failed"); |
aoqi@0 | 3742 | } |
aoqi@0 | 3743 | } |
aoqi@0 | 3744 | |
aoqi@0 | 3745 | // initialize thread priority policy |
aoqi@0 | 3746 | prio_init(); |
aoqi@0 | 3747 | |
aoqi@0 | 3748 | #ifdef __APPLE__ |
aoqi@0 | 3749 | // dynamically link to objective c gc registration |
aoqi@0 | 3750 | void *handleLibObjc = dlopen(OBJC_LIB, RTLD_LAZY); |
aoqi@0 | 3751 | if (handleLibObjc != NULL) { |
aoqi@0 | 3752 | objc_registerThreadWithCollectorFunction = (objc_registerThreadWithCollector_t) dlsym(handleLibObjc, OBJC_GCREGISTER); |
aoqi@0 | 3753 | } |
aoqi@0 | 3754 | #endif |
aoqi@0 | 3755 | |
aoqi@0 | 3756 | return JNI_OK; |
aoqi@0 | 3757 | } |
aoqi@0 | 3758 | |
aoqi@0 | 3759 | // Mark the polling page as unreadable |
aoqi@0 | 3760 | void os::make_polling_page_unreadable(void) { |
aoqi@0 | 3761 | if( !guard_memory((char*)_polling_page, Bsd::page_size()) ) |
aoqi@0 | 3762 | fatal("Could not disable polling page"); |
aoqi@0 | 3763 | }; |
aoqi@0 | 3764 | |
aoqi@0 | 3765 | // Mark the polling page as readable |
aoqi@0 | 3766 | void os::make_polling_page_readable(void) { |
aoqi@0 | 3767 | if( !bsd_mprotect((char *)_polling_page, Bsd::page_size(), PROT_READ)) { |
aoqi@0 | 3768 | fatal("Could not enable polling page"); |
aoqi@0 | 3769 | } |
aoqi@0 | 3770 | }; |
aoqi@0 | 3771 | |
aoqi@0 | 3772 | int os::active_processor_count() { |
aoqi@0 | 3773 | return _processor_count; |
aoqi@0 | 3774 | } |
aoqi@0 | 3775 | |
aoqi@0 | 3776 | void os::set_native_thread_name(const char *name) { |
aoqi@0 | 3777 | #if defined(__APPLE__) && MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_X_VERSION_10_5 |
aoqi@0 | 3778 | // This is only supported in Snow Leopard and beyond |
aoqi@0 | 3779 | if (name != NULL) { |
aoqi@0 | 3780 | // Add a "Java: " prefix to the name |
aoqi@0 | 3781 | char buf[MAXTHREADNAMESIZE]; |
aoqi@0 | 3782 | snprintf(buf, sizeof(buf), "Java: %s", name); |
aoqi@0 | 3783 | pthread_setname_np(buf); |
aoqi@0 | 3784 | } |
aoqi@0 | 3785 | #endif |
aoqi@0 | 3786 | } |
aoqi@0 | 3787 | |
aoqi@0 | 3788 | bool os::distribute_processes(uint length, uint* distribution) { |
aoqi@0 | 3789 | // Not yet implemented. |
aoqi@0 | 3790 | return false; |
aoqi@0 | 3791 | } |
aoqi@0 | 3792 | |
aoqi@0 | 3793 | bool os::bind_to_processor(uint processor_id) { |
aoqi@0 | 3794 | // Not yet implemented. |
aoqi@0 | 3795 | return false; |
aoqi@0 | 3796 | } |
aoqi@0 | 3797 | |
aoqi@0 | 3798 | void os::SuspendedThreadTask::internal_do_task() { |
aoqi@0 | 3799 | if (do_suspend(_thread->osthread())) { |
aoqi@0 | 3800 | SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); |
aoqi@0 | 3801 | do_task(context); |
aoqi@0 | 3802 | do_resume(_thread->osthread()); |
aoqi@0 | 3803 | } |
aoqi@0 | 3804 | } |
aoqi@0 | 3805 | |
aoqi@0 | 3806 | /// |
aoqi@0 | 3807 | class PcFetcher : public os::SuspendedThreadTask { |
aoqi@0 | 3808 | public: |
aoqi@0 | 3809 | PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} |
aoqi@0 | 3810 | ExtendedPC result(); |
aoqi@0 | 3811 | protected: |
aoqi@0 | 3812 | void do_task(const os::SuspendedThreadTaskContext& context); |
aoqi@0 | 3813 | private: |
aoqi@0 | 3814 | ExtendedPC _epc; |
aoqi@0 | 3815 | }; |
aoqi@0 | 3816 | |
aoqi@0 | 3817 | ExtendedPC PcFetcher::result() { |
aoqi@0 | 3818 | guarantee(is_done(), "task is not done yet."); |
aoqi@0 | 3819 | return _epc; |
aoqi@0 | 3820 | } |
aoqi@0 | 3821 | |
aoqi@0 | 3822 | void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { |
aoqi@0 | 3823 | Thread* thread = context.thread(); |
aoqi@0 | 3824 | OSThread* osthread = thread->osthread(); |
aoqi@0 | 3825 | if (osthread->ucontext() != NULL) { |
aoqi@0 | 3826 | _epc = os::Bsd::ucontext_get_pc((ucontext_t *) context.ucontext()); |
aoqi@0 | 3827 | } else { |
aoqi@0 | 3828 | // NULL context is unexpected, double-check this is the VMThread |
aoqi@0 | 3829 | guarantee(thread->is_VM_thread(), "can only be called for VMThread"); |
aoqi@0 | 3830 | } |
aoqi@0 | 3831 | } |
aoqi@0 | 3832 | |
aoqi@0 | 3833 | // Suspends the target using the signal mechanism and then grabs the PC before |
aoqi@0 | 3834 | // resuming the target. Used by the flat-profiler only |
aoqi@0 | 3835 | ExtendedPC os::get_thread_pc(Thread* thread) { |
aoqi@0 | 3836 | // Make sure that it is called by the watcher for the VMThread |
aoqi@0 | 3837 | assert(Thread::current()->is_Watcher_thread(), "Must be watcher"); |
aoqi@0 | 3838 | assert(thread->is_VM_thread(), "Can only be called for VMThread"); |
aoqi@0 | 3839 | |
aoqi@0 | 3840 | PcFetcher fetcher(thread); |
aoqi@0 | 3841 | fetcher.run(); |
aoqi@0 | 3842 | return fetcher.result(); |
aoqi@0 | 3843 | } |
aoqi@0 | 3844 | |
aoqi@0 | 3845 | int os::Bsd::safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime) |
aoqi@0 | 3846 | { |
aoqi@0 | 3847 | return pthread_cond_timedwait(_cond, _mutex, _abstime); |
aoqi@0 | 3848 | } |
aoqi@0 | 3849 | |
aoqi@0 | 3850 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 3851 | // debug support |
aoqi@0 | 3852 | |
aoqi@0 | 3853 | bool os::find(address addr, outputStream* st) { |
aoqi@0 | 3854 | Dl_info dlinfo; |
aoqi@0 | 3855 | memset(&dlinfo, 0, sizeof(dlinfo)); |
aoqi@0 | 3856 | if (dladdr(addr, &dlinfo) != 0) { |
aoqi@0 | 3857 | st->print(PTR_FORMAT ": ", addr); |
aoqi@0 | 3858 | if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { |
aoqi@0 | 3859 | st->print("%s+%#x", dlinfo.dli_sname, |
aoqi@0 | 3860 | addr - (intptr_t)dlinfo.dli_saddr); |
aoqi@0 | 3861 | } else if (dlinfo.dli_fbase != NULL) { |
aoqi@0 | 3862 | st->print("<offset %#x>", addr - (intptr_t)dlinfo.dli_fbase); |
aoqi@0 | 3863 | } else { |
aoqi@0 | 3864 | st->print("<absolute address>"); |
aoqi@0 | 3865 | } |
aoqi@0 | 3866 | if (dlinfo.dli_fname != NULL) { |
aoqi@0 | 3867 | st->print(" in %s", dlinfo.dli_fname); |
aoqi@0 | 3868 | } |
aoqi@0 | 3869 | if (dlinfo.dli_fbase != NULL) { |
aoqi@0 | 3870 | st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); |
aoqi@0 | 3871 | } |
aoqi@0 | 3872 | st->cr(); |
aoqi@0 | 3873 | |
aoqi@0 | 3874 | if (Verbose) { |
aoqi@0 | 3875 | // decode some bytes around the PC |
aoqi@0 | 3876 | address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); |
aoqi@0 | 3877 | address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); |
aoqi@0 | 3878 | address lowest = (address) dlinfo.dli_sname; |
aoqi@0 | 3879 | if (!lowest) lowest = (address) dlinfo.dli_fbase; |
aoqi@0 | 3880 | if (begin < lowest) begin = lowest; |
aoqi@0 | 3881 | Dl_info dlinfo2; |
aoqi@0 | 3882 | if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr |
aoqi@0 | 3883 | && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) |
aoqi@0 | 3884 | end = (address) dlinfo2.dli_saddr; |
aoqi@0 | 3885 | Disassembler::decode(begin, end, st); |
aoqi@0 | 3886 | } |
aoqi@0 | 3887 | return true; |
aoqi@0 | 3888 | } |
aoqi@0 | 3889 | return false; |
aoqi@0 | 3890 | } |
aoqi@0 | 3891 | |
aoqi@0 | 3892 | //////////////////////////////////////////////////////////////////////////////// |
aoqi@0 | 3893 | // misc |
aoqi@0 | 3894 | |
aoqi@0 | 3895 | // This does not do anything on Bsd. This is basically a hook for being |
aoqi@0 | 3896 | // able to use structured exception handling (thread-local exception filters) |
aoqi@0 | 3897 | // on, e.g., Win32. |
aoqi@0 | 3898 | void |
aoqi@0 | 3899 | os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, |
aoqi@0 | 3900 | JavaCallArguments* args, Thread* thread) { |
aoqi@0 | 3901 | f(value, method, args, thread); |
aoqi@0 | 3902 | } |
aoqi@0 | 3903 | |
aoqi@0 | 3904 | void os::print_statistics() { |
aoqi@0 | 3905 | } |
aoqi@0 | 3906 | |
aoqi@0 | 3907 | int os::message_box(const char* title, const char* message) { |
aoqi@0 | 3908 | int i; |
aoqi@0 | 3909 | fdStream err(defaultStream::error_fd()); |
aoqi@0 | 3910 | for (i = 0; i < 78; i++) err.print_raw("="); |
aoqi@0 | 3911 | err.cr(); |
aoqi@0 | 3912 | err.print_raw_cr(title); |
aoqi@0 | 3913 | for (i = 0; i < 78; i++) err.print_raw("-"); |
aoqi@0 | 3914 | err.cr(); |
aoqi@0 | 3915 | err.print_raw_cr(message); |
aoqi@0 | 3916 | for (i = 0; i < 78; i++) err.print_raw("="); |
aoqi@0 | 3917 | err.cr(); |
aoqi@0 | 3918 | |
aoqi@0 | 3919 | char buf[16]; |
aoqi@0 | 3920 | // Prevent process from exiting upon "read error" without consuming all CPU |
aoqi@0 | 3921 | while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } |
aoqi@0 | 3922 | |
aoqi@0 | 3923 | return buf[0] == 'y' || buf[0] == 'Y'; |
aoqi@0 | 3924 | } |
aoqi@0 | 3925 | |
aoqi@0 | 3926 | int os::stat(const char *path, struct stat *sbuf) { |
aoqi@0 | 3927 | char pathbuf[MAX_PATH]; |
aoqi@0 | 3928 | if (strlen(path) > MAX_PATH - 1) { |
aoqi@0 | 3929 | errno = ENAMETOOLONG; |
aoqi@0 | 3930 | return -1; |
aoqi@0 | 3931 | } |
aoqi@0 | 3932 | os::native_path(strcpy(pathbuf, path)); |
aoqi@0 | 3933 | return ::stat(pathbuf, sbuf); |
aoqi@0 | 3934 | } |
aoqi@0 | 3935 | |
aoqi@0 | 3936 | bool os::check_heap(bool force) { |
aoqi@0 | 3937 | return true; |
aoqi@0 | 3938 | } |
aoqi@0 | 3939 | |
aoqi@0 | 3940 | ATTRIBUTE_PRINTF(3, 0) |
aoqi@0 | 3941 | int local_vsnprintf(char* buf, size_t count, const char* format, va_list args) { |
aoqi@0 | 3942 | return ::vsnprintf(buf, count, format, args); |
aoqi@0 | 3943 | } |
aoqi@0 | 3944 | |
aoqi@0 | 3945 | // Is a (classpath) directory empty? |
aoqi@0 | 3946 | bool os::dir_is_empty(const char* path) { |
aoqi@0 | 3947 | DIR *dir = NULL; |
aoqi@0 | 3948 | struct dirent *ptr; |
aoqi@0 | 3949 | |
aoqi@0 | 3950 | dir = opendir(path); |
aoqi@0 | 3951 | if (dir == NULL) return true; |
aoqi@0 | 3952 | |
aoqi@0 | 3953 | /* Scan the directory */ |
aoqi@0 | 3954 | bool result = true; |
aoqi@0 | 3955 | char buf[sizeof(struct dirent) + MAX_PATH]; |
aoqi@0 | 3956 | while (result && (ptr = ::readdir(dir)) != NULL) { |
aoqi@0 | 3957 | if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { |
aoqi@0 | 3958 | result = false; |
aoqi@0 | 3959 | } |
aoqi@0 | 3960 | } |
aoqi@0 | 3961 | closedir(dir); |
aoqi@0 | 3962 | return result; |
aoqi@0 | 3963 | } |
aoqi@0 | 3964 | |
aoqi@0 | 3965 | // This code originates from JDK's sysOpen and open64_w |
aoqi@0 | 3966 | // from src/solaris/hpi/src/system_md.c |
aoqi@0 | 3967 | |
aoqi@0 | 3968 | #ifndef O_DELETE |
aoqi@0 | 3969 | #define O_DELETE 0x10000 |
aoqi@0 | 3970 | #endif |
aoqi@0 | 3971 | |
aoqi@0 | 3972 | // Open a file. Unlink the file immediately after open returns |
aoqi@0 | 3973 | // if the specified oflag has the O_DELETE flag set. |
aoqi@0 | 3974 | // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c |
aoqi@0 | 3975 | |
aoqi@0 | 3976 | int os::open(const char *path, int oflag, int mode) { |
aoqi@0 | 3977 | |
aoqi@0 | 3978 | if (strlen(path) > MAX_PATH - 1) { |
aoqi@0 | 3979 | errno = ENAMETOOLONG; |
aoqi@0 | 3980 | return -1; |
aoqi@0 | 3981 | } |
aoqi@0 | 3982 | int fd; |
aoqi@0 | 3983 | int o_delete = (oflag & O_DELETE); |
aoqi@0 | 3984 | oflag = oflag & ~O_DELETE; |
aoqi@0 | 3985 | |
aoqi@0 | 3986 | fd = ::open(path, oflag, mode); |
aoqi@0 | 3987 | if (fd == -1) return -1; |
aoqi@0 | 3988 | |
aoqi@0 | 3989 | //If the open succeeded, the file might still be a directory |
aoqi@0 | 3990 | { |
aoqi@0 | 3991 | struct stat buf; |
aoqi@0 | 3992 | int ret = ::fstat(fd, &buf); |
aoqi@0 | 3993 | int st_mode = buf.st_mode; |
aoqi@0 | 3994 | |
aoqi@0 | 3995 | if (ret != -1) { |
aoqi@0 | 3996 | if ((st_mode & S_IFMT) == S_IFDIR) { |
aoqi@0 | 3997 | errno = EISDIR; |
aoqi@0 | 3998 | ::close(fd); |
aoqi@0 | 3999 | return -1; |
aoqi@0 | 4000 | } |
aoqi@0 | 4001 | } else { |
aoqi@0 | 4002 | ::close(fd); |
aoqi@0 | 4003 | return -1; |
aoqi@0 | 4004 | } |
aoqi@0 | 4005 | } |
aoqi@0 | 4006 | |
aoqi@0 | 4007 | /* |
aoqi@0 | 4008 | * All file descriptors that are opened in the JVM and not |
aoqi@0 | 4009 | * specifically destined for a subprocess should have the |
aoqi@0 | 4010 | * close-on-exec flag set. If we don't set it, then careless 3rd |
aoqi@0 | 4011 | * party native code might fork and exec without closing all |
aoqi@0 | 4012 | * appropriate file descriptors (e.g. as we do in closeDescriptors in |
aoqi@0 | 4013 | * UNIXProcess.c), and this in turn might: |
aoqi@0 | 4014 | * |
aoqi@0 | 4015 | * - cause end-of-file to fail to be detected on some file |
aoqi@0 | 4016 | * descriptors, resulting in mysterious hangs, or |
aoqi@0 | 4017 | * |
aoqi@0 | 4018 | * - might cause an fopen in the subprocess to fail on a system |
aoqi@0 | 4019 | * suffering from bug 1085341. |
aoqi@0 | 4020 | * |
aoqi@0 | 4021 | * (Yes, the default setting of the close-on-exec flag is a Unix |
aoqi@0 | 4022 | * design flaw) |
aoqi@0 | 4023 | * |
aoqi@0 | 4024 | * See: |
aoqi@0 | 4025 | * 1085341: 32-bit stdio routines should support file descriptors >255 |
aoqi@0 | 4026 | * 4843136: (process) pipe file descriptor from Runtime.exec not being closed |
aoqi@0 | 4027 | * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 |
aoqi@0 | 4028 | */ |
aoqi@0 | 4029 | #ifdef FD_CLOEXEC |
aoqi@0 | 4030 | { |
aoqi@0 | 4031 | int flags = ::fcntl(fd, F_GETFD); |
aoqi@0 | 4032 | if (flags != -1) |
aoqi@0 | 4033 | ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); |
aoqi@0 | 4034 | } |
aoqi@0 | 4035 | #endif |
aoqi@0 | 4036 | |
aoqi@0 | 4037 | if (o_delete != 0) { |
aoqi@0 | 4038 | ::unlink(path); |
aoqi@0 | 4039 | } |
aoqi@0 | 4040 | return fd; |
aoqi@0 | 4041 | } |
aoqi@0 | 4042 | |
aoqi@0 | 4043 | |
aoqi@0 | 4044 | // create binary file, rewriting existing file if required |
aoqi@0 | 4045 | int os::create_binary_file(const char* path, bool rewrite_existing) { |
aoqi@0 | 4046 | int oflags = O_WRONLY | O_CREAT; |
aoqi@0 | 4047 | if (!rewrite_existing) { |
aoqi@0 | 4048 | oflags |= O_EXCL; |
aoqi@0 | 4049 | } |
aoqi@0 | 4050 | return ::open(path, oflags, S_IREAD | S_IWRITE); |
aoqi@0 | 4051 | } |
aoqi@0 | 4052 | |
aoqi@0 | 4053 | // return current position of file pointer |
aoqi@0 | 4054 | jlong os::current_file_offset(int fd) { |
aoqi@0 | 4055 | return (jlong)::lseek(fd, (off_t)0, SEEK_CUR); |
aoqi@0 | 4056 | } |
aoqi@0 | 4057 | |
aoqi@0 | 4058 | // move file pointer to the specified offset |
aoqi@0 | 4059 | jlong os::seek_to_file_offset(int fd, jlong offset) { |
aoqi@0 | 4060 | return (jlong)::lseek(fd, (off_t)offset, SEEK_SET); |
aoqi@0 | 4061 | } |
aoqi@0 | 4062 | |
aoqi@0 | 4063 | // This code originates from JDK's sysAvailable |
aoqi@0 | 4064 | // from src/solaris/hpi/src/native_threads/src/sys_api_td.c |
aoqi@0 | 4065 | |
aoqi@0 | 4066 | int os::available(int fd, jlong *bytes) { |
aoqi@0 | 4067 | jlong cur, end; |
aoqi@0 | 4068 | int mode; |
aoqi@0 | 4069 | struct stat buf; |
aoqi@0 | 4070 | |
aoqi@0 | 4071 | if (::fstat(fd, &buf) >= 0) { |
aoqi@0 | 4072 | mode = buf.st_mode; |
aoqi@0 | 4073 | if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
aoqi@0 | 4074 | /* |
aoqi@0 | 4075 | * XXX: is the following call interruptible? If so, this might |
aoqi@0 | 4076 | * need to go through the INTERRUPT_IO() wrapper as for other |
aoqi@0 | 4077 | * blocking, interruptible calls in this file. |
aoqi@0 | 4078 | */ |
aoqi@0 | 4079 | int n; |
aoqi@0 | 4080 | if (::ioctl(fd, FIONREAD, &n) >= 0) { |
aoqi@0 | 4081 | *bytes = n; |
aoqi@0 | 4082 | return 1; |
aoqi@0 | 4083 | } |
aoqi@0 | 4084 | } |
aoqi@0 | 4085 | } |
aoqi@0 | 4086 | if ((cur = ::lseek(fd, 0L, SEEK_CUR)) == -1) { |
aoqi@0 | 4087 | return 0; |
aoqi@0 | 4088 | } else if ((end = ::lseek(fd, 0L, SEEK_END)) == -1) { |
aoqi@0 | 4089 | return 0; |
aoqi@0 | 4090 | } else if (::lseek(fd, cur, SEEK_SET) == -1) { |
aoqi@0 | 4091 | return 0; |
aoqi@0 | 4092 | } |
aoqi@0 | 4093 | *bytes = end - cur; |
aoqi@0 | 4094 | return 1; |
aoqi@0 | 4095 | } |
aoqi@0 | 4096 | |
aoqi@0 | 4097 | int os::socket_available(int fd, jint *pbytes) { |
aoqi@0 | 4098 | if (fd < 0) |
aoqi@0 | 4099 | return OS_OK; |
aoqi@0 | 4100 | |
aoqi@0 | 4101 | int ret; |
aoqi@0 | 4102 | |
aoqi@0 | 4103 | RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); |
aoqi@0 | 4104 | |
aoqi@0 | 4105 | //%% note ioctl can return 0 when successful, JVM_SocketAvailable |
aoqi@0 | 4106 | // is expected to return 0 on failure and 1 on success to the jdk. |
aoqi@0 | 4107 | |
aoqi@0 | 4108 | return (ret == OS_ERR) ? 0 : 1; |
aoqi@0 | 4109 | } |
aoqi@0 | 4110 | |
aoqi@0 | 4111 | // Map a block of memory. |
aoqi@0 | 4112 | char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, |
aoqi@0 | 4113 | char *addr, size_t bytes, bool read_only, |
aoqi@0 | 4114 | bool allow_exec) { |
aoqi@0 | 4115 | int prot; |
aoqi@0 | 4116 | int flags; |
aoqi@0 | 4117 | |
aoqi@0 | 4118 | if (read_only) { |
aoqi@0 | 4119 | prot = PROT_READ; |
aoqi@0 | 4120 | flags = MAP_SHARED; |
aoqi@0 | 4121 | } else { |
aoqi@0 | 4122 | prot = PROT_READ | PROT_WRITE; |
aoqi@0 | 4123 | flags = MAP_PRIVATE; |
aoqi@0 | 4124 | } |
aoqi@0 | 4125 | |
aoqi@0 | 4126 | if (allow_exec) { |
aoqi@0 | 4127 | prot |= PROT_EXEC; |
aoqi@0 | 4128 | } |
aoqi@0 | 4129 | |
aoqi@0 | 4130 | if (addr != NULL) { |
aoqi@0 | 4131 | flags |= MAP_FIXED; |
aoqi@0 | 4132 | } |
aoqi@0 | 4133 | |
aoqi@0 | 4134 | char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, |
aoqi@0 | 4135 | fd, file_offset); |
aoqi@0 | 4136 | if (mapped_address == MAP_FAILED) { |
aoqi@0 | 4137 | return NULL; |
aoqi@0 | 4138 | } |
aoqi@0 | 4139 | return mapped_address; |
aoqi@0 | 4140 | } |
aoqi@0 | 4141 | |
aoqi@0 | 4142 | |
aoqi@0 | 4143 | // Remap a block of memory. |
aoqi@0 | 4144 | char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, |
aoqi@0 | 4145 | char *addr, size_t bytes, bool read_only, |
aoqi@0 | 4146 | bool allow_exec) { |
aoqi@0 | 4147 | // same as map_memory() on this OS |
aoqi@0 | 4148 | return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, |
aoqi@0 | 4149 | allow_exec); |
aoqi@0 | 4150 | } |
aoqi@0 | 4151 | |
aoqi@0 | 4152 | |
aoqi@0 | 4153 | // Unmap a block of memory. |
aoqi@0 | 4154 | bool os::pd_unmap_memory(char* addr, size_t bytes) { |
aoqi@0 | 4155 | return munmap(addr, bytes) == 0; |
aoqi@0 | 4156 | } |
aoqi@0 | 4157 | |
aoqi@0 | 4158 | // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) |
aoqi@0 | 4159 | // are used by JVM M&M and JVMTI to get user+sys or user CPU time |
aoqi@0 | 4160 | // of a thread. |
aoqi@0 | 4161 | // |
aoqi@0 | 4162 | // current_thread_cpu_time() and thread_cpu_time(Thread*) returns |
aoqi@0 | 4163 | // the fast estimate available on the platform. |
aoqi@0 | 4164 | |
aoqi@0 | 4165 | jlong os::current_thread_cpu_time() { |
aoqi@0 | 4166 | #ifdef __APPLE__ |
aoqi@0 | 4167 | return os::thread_cpu_time(Thread::current(), true /* user + sys */); |
aoqi@0 | 4168 | #else |
aoqi@0 | 4169 | Unimplemented(); |
aoqi@0 | 4170 | return 0; |
aoqi@0 | 4171 | #endif |
aoqi@0 | 4172 | } |
aoqi@0 | 4173 | |
aoqi@0 | 4174 | jlong os::thread_cpu_time(Thread* thread) { |
aoqi@0 | 4175 | #ifdef __APPLE__ |
aoqi@0 | 4176 | return os::thread_cpu_time(thread, true /* user + sys */); |
aoqi@0 | 4177 | #else |
aoqi@0 | 4178 | Unimplemented(); |
aoqi@0 | 4179 | return 0; |
aoqi@0 | 4180 | #endif |
aoqi@0 | 4181 | } |
aoqi@0 | 4182 | |
aoqi@0 | 4183 | jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { |
aoqi@0 | 4184 | #ifdef __APPLE__ |
aoqi@0 | 4185 | return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); |
aoqi@0 | 4186 | #else |
aoqi@0 | 4187 | Unimplemented(); |
aoqi@0 | 4188 | return 0; |
aoqi@0 | 4189 | #endif |
aoqi@0 | 4190 | } |
aoqi@0 | 4191 | |
aoqi@0 | 4192 | jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { |
aoqi@0 | 4193 | #ifdef __APPLE__ |
aoqi@0 | 4194 | struct thread_basic_info tinfo; |
aoqi@0 | 4195 | mach_msg_type_number_t tcount = THREAD_INFO_MAX; |
aoqi@0 | 4196 | kern_return_t kr; |
aoqi@0 | 4197 | thread_t mach_thread; |
aoqi@0 | 4198 | |
aoqi@0 | 4199 | mach_thread = thread->osthread()->thread_id(); |
aoqi@0 | 4200 | kr = thread_info(mach_thread, THREAD_BASIC_INFO, (thread_info_t)&tinfo, &tcount); |
aoqi@0 | 4201 | if (kr != KERN_SUCCESS) |
aoqi@0 | 4202 | return -1; |
aoqi@0 | 4203 | |
aoqi@0 | 4204 | if (user_sys_cpu_time) { |
aoqi@0 | 4205 | jlong nanos; |
aoqi@0 | 4206 | nanos = ((jlong) tinfo.system_time.seconds + tinfo.user_time.seconds) * (jlong)1000000000; |
aoqi@0 | 4207 | nanos += ((jlong) tinfo.system_time.microseconds + (jlong) tinfo.user_time.microseconds) * (jlong)1000; |
aoqi@0 | 4208 | return nanos; |
aoqi@0 | 4209 | } else { |
aoqi@0 | 4210 | return ((jlong)tinfo.user_time.seconds * 1000000000) + ((jlong)tinfo.user_time.microseconds * (jlong)1000); |
aoqi@0 | 4211 | } |
aoqi@0 | 4212 | #else |
aoqi@0 | 4213 | Unimplemented(); |
aoqi@0 | 4214 | return 0; |
aoqi@0 | 4215 | #endif |
aoqi@0 | 4216 | } |
aoqi@0 | 4217 | |
aoqi@0 | 4218 | |
aoqi@0 | 4219 | void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
aoqi@0 | 4220 | info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
aoqi@0 | 4221 | info_ptr->may_skip_backward = false; // elapsed time not wall time |
aoqi@0 | 4222 | info_ptr->may_skip_forward = false; // elapsed time not wall time |
aoqi@0 | 4223 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
aoqi@0 | 4224 | } |
aoqi@0 | 4225 | |
aoqi@0 | 4226 | void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { |
aoqi@0 | 4227 | info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits |
aoqi@0 | 4228 | info_ptr->may_skip_backward = false; // elapsed time not wall time |
aoqi@0 | 4229 | info_ptr->may_skip_forward = false; // elapsed time not wall time |
aoqi@0 | 4230 | info_ptr->kind = JVMTI_TIMER_TOTAL_CPU; // user+system time is returned |
aoqi@0 | 4231 | } |
aoqi@0 | 4232 | |
aoqi@0 | 4233 | bool os::is_thread_cpu_time_supported() { |
aoqi@0 | 4234 | #ifdef __APPLE__ |
aoqi@0 | 4235 | return true; |
aoqi@0 | 4236 | #else |
aoqi@0 | 4237 | return false; |
aoqi@0 | 4238 | #endif |
aoqi@0 | 4239 | } |
aoqi@0 | 4240 | |
aoqi@0 | 4241 | // System loadavg support. Returns -1 if load average cannot be obtained. |
aoqi@0 | 4242 | // Bsd doesn't yet have a (official) notion of processor sets, |
aoqi@0 | 4243 | // so just return the system wide load average. |
aoqi@0 | 4244 | int os::loadavg(double loadavg[], int nelem) { |
aoqi@0 | 4245 | return ::getloadavg(loadavg, nelem); |
aoqi@0 | 4246 | } |
aoqi@0 | 4247 | |
aoqi@0 | 4248 | void os::pause() { |
aoqi@0 | 4249 | char filename[MAX_PATH]; |
aoqi@0 | 4250 | if (PauseAtStartupFile && PauseAtStartupFile[0]) { |
aoqi@0 | 4251 | jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); |
aoqi@0 | 4252 | } else { |
aoqi@0 | 4253 | jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); |
aoqi@0 | 4254 | } |
aoqi@0 | 4255 | |
aoqi@0 | 4256 | int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); |
aoqi@0 | 4257 | if (fd != -1) { |
aoqi@0 | 4258 | struct stat buf; |
aoqi@0 | 4259 | ::close(fd); |
aoqi@0 | 4260 | while (::stat(filename, &buf) == 0) { |
aoqi@0 | 4261 | (void)::poll(NULL, 0, 100); |
aoqi@0 | 4262 | } |
aoqi@0 | 4263 | } else { |
aoqi@0 | 4264 | jio_fprintf(stderr, |
aoqi@0 | 4265 | "Could not open pause file '%s', continuing immediately.\n", filename); |
aoqi@0 | 4266 | } |
aoqi@0 | 4267 | } |
aoqi@0 | 4268 | |
aoqi@0 | 4269 | |
aoqi@0 | 4270 | // Refer to the comments in os_solaris.cpp park-unpark. |
aoqi@0 | 4271 | // |
aoqi@0 | 4272 | // Beware -- Some versions of NPTL embody a flaw where pthread_cond_timedwait() can |
aoqi@0 | 4273 | // hang indefinitely. For instance NPTL 0.60 on 2.4.21-4ELsmp is vulnerable. |
aoqi@0 | 4274 | // For specifics regarding the bug see GLIBC BUGID 261237 : |
aoqi@0 | 4275 | // http://www.mail-archive.com/debian-glibc@lists.debian.org/msg10837.html. |
aoqi@0 | 4276 | // Briefly, pthread_cond_timedwait() calls with an expiry time that's not in the future |
aoqi@0 | 4277 | // will either hang or corrupt the condvar, resulting in subsequent hangs if the condvar |
aoqi@0 | 4278 | // is used. (The simple C test-case provided in the GLIBC bug report manifests the |
aoqi@0 | 4279 | // hang). The JVM is vulernable via sleep(), Object.wait(timo), LockSupport.parkNanos() |
aoqi@0 | 4280 | // and monitorenter when we're using 1-0 locking. All those operations may result in |
aoqi@0 | 4281 | // calls to pthread_cond_timedwait(). Using LD_ASSUME_KERNEL to use an older version |
aoqi@0 | 4282 | // of libpthread avoids the problem, but isn't practical. |
aoqi@0 | 4283 | // |
aoqi@0 | 4284 | // Possible remedies: |
aoqi@0 | 4285 | // |
aoqi@0 | 4286 | // 1. Establish a minimum relative wait time. 50 to 100 msecs seems to work. |
aoqi@0 | 4287 | // This is palliative and probabilistic, however. If the thread is preempted |
aoqi@0 | 4288 | // between the call to compute_abstime() and pthread_cond_timedwait(), more |
aoqi@0 | 4289 | // than the minimum period may have passed, and the abstime may be stale (in the |
aoqi@0 | 4290 | // past) resultin in a hang. Using this technique reduces the odds of a hang |
aoqi@0 | 4291 | // but the JVM is still vulnerable, particularly on heavily loaded systems. |
aoqi@0 | 4292 | // |
aoqi@0 | 4293 | // 2. Modify park-unpark to use per-thread (per ParkEvent) pipe-pairs instead |
aoqi@0 | 4294 | // of the usual flag-condvar-mutex idiom. The write side of the pipe is set |
aoqi@0 | 4295 | // NDELAY. unpark() reduces to write(), park() reduces to read() and park(timo) |
aoqi@0 | 4296 | // reduces to poll()+read(). This works well, but consumes 2 FDs per extant |
aoqi@0 | 4297 | // thread. |
aoqi@0 | 4298 | // |
aoqi@0 | 4299 | // 3. Embargo pthread_cond_timedwait() and implement a native "chron" thread |
aoqi@0 | 4300 | // that manages timeouts. We'd emulate pthread_cond_timedwait() by enqueuing |
aoqi@0 | 4301 | // a timeout request to the chron thread and then blocking via pthread_cond_wait(). |
aoqi@0 | 4302 | // This also works well. In fact it avoids kernel-level scalability impediments |
aoqi@0 | 4303 | // on certain platforms that don't handle lots of active pthread_cond_timedwait() |
aoqi@0 | 4304 | // timers in a graceful fashion. |
aoqi@0 | 4305 | // |
aoqi@0 | 4306 | // 4. When the abstime value is in the past it appears that control returns |
aoqi@0 | 4307 | // correctly from pthread_cond_timedwait(), but the condvar is left corrupt. |
aoqi@0 | 4308 | // Subsequent timedwait/wait calls may hang indefinitely. Given that, we |
aoqi@0 | 4309 | // can avoid the problem by reinitializing the condvar -- by cond_destroy() |
aoqi@0 | 4310 | // followed by cond_init() -- after all calls to pthread_cond_timedwait(). |
aoqi@0 | 4311 | // It may be possible to avoid reinitialization by checking the return |
aoqi@0 | 4312 | // value from pthread_cond_timedwait(). In addition to reinitializing the |
aoqi@0 | 4313 | // condvar we must establish the invariant that cond_signal() is only called |
aoqi@0 | 4314 | // within critical sections protected by the adjunct mutex. This prevents |
aoqi@0 | 4315 | // cond_signal() from "seeing" a condvar that's in the midst of being |
aoqi@0 | 4316 | // reinitialized or that is corrupt. Sadly, this invariant obviates the |
aoqi@0 | 4317 | // desirable signal-after-unlock optimization that avoids futile context switching. |
aoqi@0 | 4318 | // |
aoqi@0 | 4319 | // I'm also concerned that some versions of NTPL might allocate an auxilliary |
aoqi@0 | 4320 | // structure when a condvar is used or initialized. cond_destroy() would |
aoqi@0 | 4321 | // release the helper structure. Our reinitialize-after-timedwait fix |
aoqi@0 | 4322 | // put excessive stress on malloc/free and locks protecting the c-heap. |
aoqi@0 | 4323 | // |
aoqi@0 | 4324 | // We currently use (4). See the WorkAroundNTPLTimedWaitHang flag. |
aoqi@0 | 4325 | // It may be possible to refine (4) by checking the kernel and NTPL verisons |
aoqi@0 | 4326 | // and only enabling the work-around for vulnerable environments. |
aoqi@0 | 4327 | |
aoqi@0 | 4328 | // utility to compute the abstime argument to timedwait: |
aoqi@0 | 4329 | // millis is the relative timeout time |
aoqi@0 | 4330 | // abstime will be the absolute timeout time |
aoqi@0 | 4331 | // TODO: replace compute_abstime() with unpackTime() |
aoqi@0 | 4332 | |
aoqi@0 | 4333 | static struct timespec* compute_abstime(struct timespec* abstime, jlong millis) { |
aoqi@0 | 4334 | if (millis < 0) millis = 0; |
aoqi@0 | 4335 | struct timeval now; |
aoqi@0 | 4336 | int status = gettimeofday(&now, NULL); |
aoqi@0 | 4337 | assert(status == 0, "gettimeofday"); |
aoqi@0 | 4338 | jlong seconds = millis / 1000; |
aoqi@0 | 4339 | millis %= 1000; |
aoqi@0 | 4340 | if (seconds > 50000000) { // see man cond_timedwait(3T) |
aoqi@0 | 4341 | seconds = 50000000; |
aoqi@0 | 4342 | } |
aoqi@0 | 4343 | abstime->tv_sec = now.tv_sec + seconds; |
aoqi@0 | 4344 | long usec = now.tv_usec + millis * 1000; |
aoqi@0 | 4345 | if (usec >= 1000000) { |
aoqi@0 | 4346 | abstime->tv_sec += 1; |
aoqi@0 | 4347 | usec -= 1000000; |
aoqi@0 | 4348 | } |
aoqi@0 | 4349 | abstime->tv_nsec = usec * 1000; |
aoqi@0 | 4350 | return abstime; |
aoqi@0 | 4351 | } |
aoqi@0 | 4352 | |
aoqi@0 | 4353 | |
aoqi@0 | 4354 | // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. |
aoqi@0 | 4355 | // Conceptually TryPark() should be equivalent to park(0). |
aoqi@0 | 4356 | |
aoqi@0 | 4357 | int os::PlatformEvent::TryPark() { |
aoqi@0 | 4358 | for (;;) { |
aoqi@0 | 4359 | const int v = _Event ; |
aoqi@0 | 4360 | guarantee ((v == 0) || (v == 1), "invariant") ; |
aoqi@0 | 4361 | if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; |
aoqi@0 | 4362 | } |
aoqi@0 | 4363 | } |
aoqi@0 | 4364 | |
aoqi@0 | 4365 | void os::PlatformEvent::park() { // AKA "down()" |
aoqi@0 | 4366 | // Invariant: Only the thread associated with the Event/PlatformEvent |
aoqi@0 | 4367 | // may call park(). |
aoqi@0 | 4368 | // TODO: assert that _Assoc != NULL or _Assoc == Self |
aoqi@0 | 4369 | int v ; |
aoqi@0 | 4370 | for (;;) { |
aoqi@0 | 4371 | v = _Event ; |
aoqi@0 | 4372 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; |
aoqi@0 | 4373 | } |
aoqi@0 | 4374 | guarantee (v >= 0, "invariant") ; |
aoqi@0 | 4375 | if (v == 0) { |
aoqi@0 | 4376 | // Do this the hard way by blocking ... |
aoqi@0 | 4377 | int status = pthread_mutex_lock(_mutex); |
aoqi@0 | 4378 | assert_status(status == 0, status, "mutex_lock"); |
aoqi@0 | 4379 | guarantee (_nParked == 0, "invariant") ; |
aoqi@0 | 4380 | ++ _nParked ; |
aoqi@0 | 4381 | while (_Event < 0) { |
aoqi@0 | 4382 | status = pthread_cond_wait(_cond, _mutex); |
aoqi@0 | 4383 | // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... |
aoqi@0 | 4384 | // Treat this the same as if the wait was interrupted |
aoqi@0 | 4385 | if (status == ETIMEDOUT) { status = EINTR; } |
aoqi@0 | 4386 | assert_status(status == 0 || status == EINTR, status, "cond_wait"); |
aoqi@0 | 4387 | } |
aoqi@0 | 4388 | -- _nParked ; |
aoqi@0 | 4389 | |
aoqi@0 | 4390 | _Event = 0 ; |
aoqi@0 | 4391 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4392 | assert_status(status == 0, status, "mutex_unlock"); |
aoqi@0 | 4393 | // Paranoia to ensure our locked and lock-free paths interact |
aoqi@0 | 4394 | // correctly with each other. |
aoqi@0 | 4395 | OrderAccess::fence(); |
aoqi@0 | 4396 | } |
aoqi@0 | 4397 | guarantee (_Event >= 0, "invariant") ; |
aoqi@0 | 4398 | } |
aoqi@0 | 4399 | |
aoqi@0 | 4400 | int os::PlatformEvent::park(jlong millis) { |
aoqi@0 | 4401 | guarantee (_nParked == 0, "invariant") ; |
aoqi@0 | 4402 | |
aoqi@0 | 4403 | int v ; |
aoqi@0 | 4404 | for (;;) { |
aoqi@0 | 4405 | v = _Event ; |
aoqi@0 | 4406 | if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; |
aoqi@0 | 4407 | } |
aoqi@0 | 4408 | guarantee (v >= 0, "invariant") ; |
aoqi@0 | 4409 | if (v != 0) return OS_OK ; |
aoqi@0 | 4410 | |
aoqi@0 | 4411 | // We do this the hard way, by blocking the thread. |
aoqi@0 | 4412 | // Consider enforcing a minimum timeout value. |
aoqi@0 | 4413 | struct timespec abst; |
aoqi@0 | 4414 | compute_abstime(&abst, millis); |
aoqi@0 | 4415 | |
aoqi@0 | 4416 | int ret = OS_TIMEOUT; |
aoqi@0 | 4417 | int status = pthread_mutex_lock(_mutex); |
aoqi@0 | 4418 | assert_status(status == 0, status, "mutex_lock"); |
aoqi@0 | 4419 | guarantee (_nParked == 0, "invariant") ; |
aoqi@0 | 4420 | ++_nParked ; |
aoqi@0 | 4421 | |
aoqi@0 | 4422 | // Object.wait(timo) will return because of |
aoqi@0 | 4423 | // (a) notification |
aoqi@0 | 4424 | // (b) timeout |
aoqi@0 | 4425 | // (c) thread.interrupt |
aoqi@0 | 4426 | // |
aoqi@0 | 4427 | // Thread.interrupt and object.notify{All} both call Event::set. |
aoqi@0 | 4428 | // That is, we treat thread.interrupt as a special case of notification. |
aoqi@0 | 4429 | // The underlying Solaris implementation, cond_timedwait, admits |
aoqi@0 | 4430 | // spurious/premature wakeups, but the JLS/JVM spec prevents the |
aoqi@0 | 4431 | // JVM from making those visible to Java code. As such, we must |
aoqi@0 | 4432 | // filter out spurious wakeups. We assume all ETIME returns are valid. |
aoqi@0 | 4433 | // |
aoqi@0 | 4434 | // TODO: properly differentiate simultaneous notify+interrupt. |
aoqi@0 | 4435 | // In that case, we should propagate the notify to another waiter. |
aoqi@0 | 4436 | |
aoqi@0 | 4437 | while (_Event < 0) { |
aoqi@0 | 4438 | status = os::Bsd::safe_cond_timedwait(_cond, _mutex, &abst); |
aoqi@0 | 4439 | if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
aoqi@0 | 4440 | pthread_cond_destroy (_cond); |
aoqi@0 | 4441 | pthread_cond_init (_cond, NULL) ; |
aoqi@0 | 4442 | } |
aoqi@0 | 4443 | assert_status(status == 0 || status == EINTR || |
aoqi@0 | 4444 | status == ETIMEDOUT, |
aoqi@0 | 4445 | status, "cond_timedwait"); |
aoqi@0 | 4446 | if (!FilterSpuriousWakeups) break ; // previous semantics |
aoqi@0 | 4447 | if (status == ETIMEDOUT) break ; |
aoqi@0 | 4448 | // We consume and ignore EINTR and spurious wakeups. |
aoqi@0 | 4449 | } |
aoqi@0 | 4450 | --_nParked ; |
aoqi@0 | 4451 | if (_Event >= 0) { |
aoqi@0 | 4452 | ret = OS_OK; |
aoqi@0 | 4453 | } |
aoqi@0 | 4454 | _Event = 0 ; |
aoqi@0 | 4455 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4456 | assert_status(status == 0, status, "mutex_unlock"); |
aoqi@0 | 4457 | assert (_nParked == 0, "invariant") ; |
aoqi@0 | 4458 | // Paranoia to ensure our locked and lock-free paths interact |
aoqi@0 | 4459 | // correctly with each other. |
aoqi@0 | 4460 | OrderAccess::fence(); |
aoqi@0 | 4461 | return ret; |
aoqi@0 | 4462 | } |
aoqi@0 | 4463 | |
aoqi@0 | 4464 | void os::PlatformEvent::unpark() { |
aoqi@0 | 4465 | // Transitions for _Event: |
aoqi@0 | 4466 | // 0 :=> 1 |
aoqi@0 | 4467 | // 1 :=> 1 |
aoqi@0 | 4468 | // -1 :=> either 0 or 1; must signal target thread |
aoqi@0 | 4469 | // That is, we can safely transition _Event from -1 to either |
aoqi@0 | 4470 | // 0 or 1. Forcing 1 is slightly more efficient for back-to-back |
aoqi@0 | 4471 | // unpark() calls. |
aoqi@0 | 4472 | // See also: "Semaphores in Plan 9" by Mullender & Cox |
aoqi@0 | 4473 | // |
aoqi@0 | 4474 | // Note: Forcing a transition from "-1" to "1" on an unpark() means |
aoqi@0 | 4475 | // that it will take two back-to-back park() calls for the owning |
aoqi@0 | 4476 | // thread to block. This has the benefit of forcing a spurious return |
aoqi@0 | 4477 | // from the first park() call after an unpark() call which will help |
aoqi@0 | 4478 | // shake out uses of park() and unpark() without condition variables. |
aoqi@0 | 4479 | |
aoqi@0 | 4480 | if (Atomic::xchg(1, &_Event) >= 0) return; |
aoqi@0 | 4481 | |
aoqi@0 | 4482 | // Wait for the thread associated with the event to vacate |
aoqi@0 | 4483 | int status = pthread_mutex_lock(_mutex); |
aoqi@0 | 4484 | assert_status(status == 0, status, "mutex_lock"); |
aoqi@0 | 4485 | int AnyWaiters = _nParked; |
aoqi@0 | 4486 | assert(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); |
aoqi@0 | 4487 | if (AnyWaiters != 0 && WorkAroundNPTLTimedWaitHang) { |
aoqi@0 | 4488 | AnyWaiters = 0; |
aoqi@0 | 4489 | pthread_cond_signal(_cond); |
aoqi@0 | 4490 | } |
aoqi@0 | 4491 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4492 | assert_status(status == 0, status, "mutex_unlock"); |
aoqi@0 | 4493 | if (AnyWaiters != 0) { |
aoqi@0 | 4494 | status = pthread_cond_signal(_cond); |
aoqi@0 | 4495 | assert_status(status == 0, status, "cond_signal"); |
aoqi@0 | 4496 | } |
aoqi@0 | 4497 | |
aoqi@0 | 4498 | // Note that we signal() _after dropping the lock for "immortal" Events. |
aoqi@0 | 4499 | // This is safe and avoids a common class of futile wakeups. In rare |
aoqi@0 | 4500 | // circumstances this can cause a thread to return prematurely from |
aoqi@0 | 4501 | // cond_{timed}wait() but the spurious wakeup is benign and the victim will |
aoqi@0 | 4502 | // simply re-test the condition and re-park itself. |
aoqi@0 | 4503 | } |
aoqi@0 | 4504 | |
aoqi@0 | 4505 | |
aoqi@0 | 4506 | // JSR166 |
aoqi@0 | 4507 | // ------------------------------------------------------- |
aoqi@0 | 4508 | |
aoqi@0 | 4509 | /* |
aoqi@0 | 4510 | * The solaris and bsd implementations of park/unpark are fairly |
aoqi@0 | 4511 | * conservative for now, but can be improved. They currently use a |
aoqi@0 | 4512 | * mutex/condvar pair, plus a a count. |
aoqi@0 | 4513 | * Park decrements count if > 0, else does a condvar wait. Unpark |
aoqi@0 | 4514 | * sets count to 1 and signals condvar. Only one thread ever waits |
aoqi@0 | 4515 | * on the condvar. Contention seen when trying to park implies that someone |
aoqi@0 | 4516 | * is unparking you, so don't wait. And spurious returns are fine, so there |
aoqi@0 | 4517 | * is no need to track notifications. |
aoqi@0 | 4518 | */ |
aoqi@0 | 4519 | |
aoqi@0 | 4520 | #define MAX_SECS 100000000 |
aoqi@0 | 4521 | /* |
aoqi@0 | 4522 | * This code is common to bsd and solaris and will be moved to a |
aoqi@0 | 4523 | * common place in dolphin. |
aoqi@0 | 4524 | * |
aoqi@0 | 4525 | * The passed in time value is either a relative time in nanoseconds |
aoqi@0 | 4526 | * or an absolute time in milliseconds. Either way it has to be unpacked |
aoqi@0 | 4527 | * into suitable seconds and nanoseconds components and stored in the |
aoqi@0 | 4528 | * given timespec structure. |
aoqi@0 | 4529 | * Given time is a 64-bit value and the time_t used in the timespec is only |
aoqi@0 | 4530 | * a signed-32-bit value (except on 64-bit Bsd) we have to watch for |
aoqi@0 | 4531 | * overflow if times way in the future are given. Further on Solaris versions |
aoqi@0 | 4532 | * prior to 10 there is a restriction (see cond_timedwait) that the specified |
aoqi@0 | 4533 | * number of seconds, in abstime, is less than current_time + 100,000,000. |
aoqi@0 | 4534 | * As it will be 28 years before "now + 100000000" will overflow we can |
aoqi@0 | 4535 | * ignore overflow and just impose a hard-limit on seconds using the value |
aoqi@0 | 4536 | * of "now + 100,000,000". This places a limit on the timeout of about 3.17 |
aoqi@0 | 4537 | * years from "now". |
aoqi@0 | 4538 | */ |
aoqi@0 | 4539 | |
aoqi@0 | 4540 | static void unpackTime(struct timespec* absTime, bool isAbsolute, jlong time) { |
aoqi@0 | 4541 | assert (time > 0, "convertTime"); |
aoqi@0 | 4542 | |
aoqi@0 | 4543 | struct timeval now; |
aoqi@0 | 4544 | int status = gettimeofday(&now, NULL); |
aoqi@0 | 4545 | assert(status == 0, "gettimeofday"); |
aoqi@0 | 4546 | |
aoqi@0 | 4547 | time_t max_secs = now.tv_sec + MAX_SECS; |
aoqi@0 | 4548 | |
aoqi@0 | 4549 | if (isAbsolute) { |
aoqi@0 | 4550 | jlong secs = time / 1000; |
aoqi@0 | 4551 | if (secs > max_secs) { |
aoqi@0 | 4552 | absTime->tv_sec = max_secs; |
aoqi@0 | 4553 | } |
aoqi@0 | 4554 | else { |
aoqi@0 | 4555 | absTime->tv_sec = secs; |
aoqi@0 | 4556 | } |
aoqi@0 | 4557 | absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; |
aoqi@0 | 4558 | } |
aoqi@0 | 4559 | else { |
aoqi@0 | 4560 | jlong secs = time / NANOSECS_PER_SEC; |
aoqi@0 | 4561 | if (secs >= MAX_SECS) { |
aoqi@0 | 4562 | absTime->tv_sec = max_secs; |
aoqi@0 | 4563 | absTime->tv_nsec = 0; |
aoqi@0 | 4564 | } |
aoqi@0 | 4565 | else { |
aoqi@0 | 4566 | absTime->tv_sec = now.tv_sec + secs; |
aoqi@0 | 4567 | absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; |
aoqi@0 | 4568 | if (absTime->tv_nsec >= NANOSECS_PER_SEC) { |
aoqi@0 | 4569 | absTime->tv_nsec -= NANOSECS_PER_SEC; |
aoqi@0 | 4570 | ++absTime->tv_sec; // note: this must be <= max_secs |
aoqi@0 | 4571 | } |
aoqi@0 | 4572 | } |
aoqi@0 | 4573 | } |
aoqi@0 | 4574 | assert(absTime->tv_sec >= 0, "tv_sec < 0"); |
aoqi@0 | 4575 | assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); |
aoqi@0 | 4576 | assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); |
aoqi@0 | 4577 | assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); |
aoqi@0 | 4578 | } |
aoqi@0 | 4579 | |
aoqi@0 | 4580 | void Parker::park(bool isAbsolute, jlong time) { |
aoqi@0 | 4581 | // Ideally we'd do something useful while spinning, such |
aoqi@0 | 4582 | // as calling unpackTime(). |
aoqi@0 | 4583 | |
aoqi@0 | 4584 | // Optional fast-path check: |
aoqi@0 | 4585 | // Return immediately if a permit is available. |
aoqi@0 | 4586 | // We depend on Atomic::xchg() having full barrier semantics |
aoqi@0 | 4587 | // since we are doing a lock-free update to _counter. |
aoqi@0 | 4588 | if (Atomic::xchg(0, &_counter) > 0) return; |
aoqi@0 | 4589 | |
aoqi@0 | 4590 | Thread* thread = Thread::current(); |
aoqi@0 | 4591 | assert(thread->is_Java_thread(), "Must be JavaThread"); |
aoqi@0 | 4592 | JavaThread *jt = (JavaThread *)thread; |
aoqi@0 | 4593 | |
aoqi@0 | 4594 | // Optional optimization -- avoid state transitions if there's an interrupt pending. |
aoqi@0 | 4595 | // Check interrupt before trying to wait |
aoqi@0 | 4596 | if (Thread::is_interrupted(thread, false)) { |
aoqi@0 | 4597 | return; |
aoqi@0 | 4598 | } |
aoqi@0 | 4599 | |
aoqi@0 | 4600 | // Next, demultiplex/decode time arguments |
aoqi@0 | 4601 | struct timespec absTime; |
aoqi@0 | 4602 | if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all |
aoqi@0 | 4603 | return; |
aoqi@0 | 4604 | } |
aoqi@0 | 4605 | if (time > 0) { |
aoqi@0 | 4606 | unpackTime(&absTime, isAbsolute, time); |
aoqi@0 | 4607 | } |
aoqi@0 | 4608 | |
aoqi@0 | 4609 | |
aoqi@0 | 4610 | // Enter safepoint region |
aoqi@0 | 4611 | // Beware of deadlocks such as 6317397. |
aoqi@0 | 4612 | // The per-thread Parker:: mutex is a classic leaf-lock. |
aoqi@0 | 4613 | // In particular a thread must never block on the Threads_lock while |
aoqi@0 | 4614 | // holding the Parker:: mutex. If safepoints are pending both the |
aoqi@0 | 4615 | // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. |
aoqi@0 | 4616 | ThreadBlockInVM tbivm(jt); |
aoqi@0 | 4617 | |
aoqi@0 | 4618 | // Don't wait if cannot get lock since interference arises from |
aoqi@0 | 4619 | // unblocking. Also. check interrupt before trying wait |
aoqi@0 | 4620 | if (Thread::is_interrupted(thread, false) || pthread_mutex_trylock(_mutex) != 0) { |
aoqi@0 | 4621 | return; |
aoqi@0 | 4622 | } |
aoqi@0 | 4623 | |
aoqi@0 | 4624 | int status ; |
aoqi@0 | 4625 | if (_counter > 0) { // no wait needed |
aoqi@0 | 4626 | _counter = 0; |
aoqi@0 | 4627 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4628 | assert (status == 0, "invariant") ; |
aoqi@0 | 4629 | // Paranoia to ensure our locked and lock-free paths interact |
aoqi@0 | 4630 | // correctly with each other and Java-level accesses. |
aoqi@0 | 4631 | OrderAccess::fence(); |
aoqi@0 | 4632 | return; |
aoqi@0 | 4633 | } |
aoqi@0 | 4634 | |
aoqi@0 | 4635 | #ifdef ASSERT |
aoqi@0 | 4636 | // Don't catch signals while blocked; let the running threads have the signals. |
aoqi@0 | 4637 | // (This allows a debugger to break into the running thread.) |
aoqi@0 | 4638 | sigset_t oldsigs; |
aoqi@0 | 4639 | sigset_t* allowdebug_blocked = os::Bsd::allowdebug_blocked_signals(); |
aoqi@0 | 4640 | pthread_sigmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); |
aoqi@0 | 4641 | #endif |
aoqi@0 | 4642 | |
aoqi@0 | 4643 | OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); |
aoqi@0 | 4644 | jt->set_suspend_equivalent(); |
aoqi@0 | 4645 | // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() |
aoqi@0 | 4646 | |
aoqi@0 | 4647 | if (time == 0) { |
aoqi@0 | 4648 | status = pthread_cond_wait (_cond, _mutex) ; |
aoqi@0 | 4649 | } else { |
aoqi@0 | 4650 | status = os::Bsd::safe_cond_timedwait (_cond, _mutex, &absTime) ; |
aoqi@0 | 4651 | if (status != 0 && WorkAroundNPTLTimedWaitHang) { |
aoqi@0 | 4652 | pthread_cond_destroy (_cond) ; |
aoqi@0 | 4653 | pthread_cond_init (_cond, NULL); |
aoqi@0 | 4654 | } |
aoqi@0 | 4655 | } |
aoqi@0 | 4656 | assert_status(status == 0 || status == EINTR || |
aoqi@0 | 4657 | status == ETIMEDOUT, |
aoqi@0 | 4658 | status, "cond_timedwait"); |
aoqi@0 | 4659 | |
aoqi@0 | 4660 | #ifdef ASSERT |
aoqi@0 | 4661 | pthread_sigmask(SIG_SETMASK, &oldsigs, NULL); |
aoqi@0 | 4662 | #endif |
aoqi@0 | 4663 | |
aoqi@0 | 4664 | _counter = 0 ; |
aoqi@0 | 4665 | status = pthread_mutex_unlock(_mutex) ; |
aoqi@0 | 4666 | assert_status(status == 0, status, "invariant") ; |
aoqi@0 | 4667 | // Paranoia to ensure our locked and lock-free paths interact |
aoqi@0 | 4668 | // correctly with each other and Java-level accesses. |
aoqi@0 | 4669 | OrderAccess::fence(); |
aoqi@0 | 4670 | |
aoqi@0 | 4671 | // If externally suspended while waiting, re-suspend |
aoqi@0 | 4672 | if (jt->handle_special_suspend_equivalent_condition()) { |
aoqi@0 | 4673 | jt->java_suspend_self(); |
aoqi@0 | 4674 | } |
aoqi@0 | 4675 | } |
aoqi@0 | 4676 | |
aoqi@0 | 4677 | void Parker::unpark() { |
aoqi@0 | 4678 | int s, status ; |
aoqi@0 | 4679 | status = pthread_mutex_lock(_mutex); |
aoqi@0 | 4680 | assert (status == 0, "invariant") ; |
aoqi@0 | 4681 | s = _counter; |
aoqi@0 | 4682 | _counter = 1; |
aoqi@0 | 4683 | if (s < 1) { |
aoqi@0 | 4684 | if (WorkAroundNPTLTimedWaitHang) { |
aoqi@0 | 4685 | status = pthread_cond_signal (_cond) ; |
aoqi@0 | 4686 | assert (status == 0, "invariant") ; |
aoqi@0 | 4687 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4688 | assert (status == 0, "invariant") ; |
aoqi@0 | 4689 | } else { |
aoqi@0 | 4690 | status = pthread_mutex_unlock(_mutex); |
aoqi@0 | 4691 | assert (status == 0, "invariant") ; |
aoqi@0 | 4692 | status = pthread_cond_signal (_cond) ; |
aoqi@0 | 4693 | assert (status == 0, "invariant") ; |
aoqi@0 | 4694 | } |
aoqi@0 | 4695 | } else { |
aoqi@0 | 4696 | pthread_mutex_unlock(_mutex); |
aoqi@0 | 4697 | assert (status == 0, "invariant") ; |
aoqi@0 | 4698 | } |
aoqi@0 | 4699 | } |
aoqi@0 | 4700 | |
aoqi@0 | 4701 | |
aoqi@0 | 4702 | /* Darwin has no "environ" in a dynamic library. */ |
aoqi@0 | 4703 | #ifdef __APPLE__ |
aoqi@0 | 4704 | #include <crt_externs.h> |
aoqi@0 | 4705 | #define environ (*_NSGetEnviron()) |
aoqi@0 | 4706 | #else |
aoqi@0 | 4707 | extern char** environ; |
aoqi@0 | 4708 | #endif |
aoqi@0 | 4709 | |
aoqi@0 | 4710 | // Run the specified command in a separate process. Return its exit value, |
aoqi@0 | 4711 | // or -1 on failure (e.g. can't fork a new process). |
aoqi@0 | 4712 | // Unlike system(), this function can be called from signal handler. It |
aoqi@0 | 4713 | // doesn't block SIGINT et al. |
aoqi@0 | 4714 | int os::fork_and_exec(char* cmd) { |
aoqi@0 | 4715 | const char * argv[4] = {"sh", "-c", cmd, NULL}; |
aoqi@0 | 4716 | |
aoqi@0 | 4717 | // fork() in BsdThreads/NPTL is not async-safe. It needs to run |
aoqi@0 | 4718 | // pthread_atfork handlers and reset pthread library. All we need is a |
aoqi@0 | 4719 | // separate process to execve. Make a direct syscall to fork process. |
aoqi@0 | 4720 | // On IA64 there's no fork syscall, we have to use fork() and hope for |
aoqi@0 | 4721 | // the best... |
aoqi@0 | 4722 | pid_t pid = fork(); |
aoqi@0 | 4723 | |
aoqi@0 | 4724 | if (pid < 0) { |
aoqi@0 | 4725 | // fork failed |
aoqi@0 | 4726 | return -1; |
aoqi@0 | 4727 | |
aoqi@0 | 4728 | } else if (pid == 0) { |
aoqi@0 | 4729 | // child process |
aoqi@0 | 4730 | |
aoqi@0 | 4731 | // execve() in BsdThreads will call pthread_kill_other_threads_np() |
aoqi@0 | 4732 | // first to kill every thread on the thread list. Because this list is |
aoqi@0 | 4733 | // not reset by fork() (see notes above), execve() will instead kill |
aoqi@0 | 4734 | // every thread in the parent process. We know this is the only thread |
aoqi@0 | 4735 | // in the new process, so make a system call directly. |
aoqi@0 | 4736 | // IA64 should use normal execve() from glibc to match the glibc fork() |
aoqi@0 | 4737 | // above. |
aoqi@0 | 4738 | execve("/bin/sh", (char* const*)argv, environ); |
aoqi@0 | 4739 | |
aoqi@0 | 4740 | // execve failed |
aoqi@0 | 4741 | _exit(-1); |
aoqi@0 | 4742 | |
aoqi@0 | 4743 | } else { |
aoqi@0 | 4744 | // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't |
aoqi@0 | 4745 | // care about the actual exit code, for now. |
aoqi@0 | 4746 | |
aoqi@0 | 4747 | int status; |
aoqi@0 | 4748 | |
aoqi@0 | 4749 | // Wait for the child process to exit. This returns immediately if |
aoqi@0 | 4750 | // the child has already exited. */ |
aoqi@0 | 4751 | while (waitpid(pid, &status, 0) < 0) { |
aoqi@0 | 4752 | switch (errno) { |
aoqi@0 | 4753 | case ECHILD: return 0; |
aoqi@0 | 4754 | case EINTR: break; |
aoqi@0 | 4755 | default: return -1; |
aoqi@0 | 4756 | } |
aoqi@0 | 4757 | } |
aoqi@0 | 4758 | |
aoqi@0 | 4759 | if (WIFEXITED(status)) { |
aoqi@0 | 4760 | // The child exited normally; get its exit code. |
aoqi@0 | 4761 | return WEXITSTATUS(status); |
aoqi@0 | 4762 | } else if (WIFSIGNALED(status)) { |
aoqi@0 | 4763 | // The child exited because of a signal |
aoqi@0 | 4764 | // The best value to return is 0x80 + signal number, |
aoqi@0 | 4765 | // because that is what all Unix shells do, and because |
aoqi@0 | 4766 | // it allows callers to distinguish between process exit and |
aoqi@0 | 4767 | // process death by signal. |
aoqi@0 | 4768 | return 0x80 + WTERMSIG(status); |
aoqi@0 | 4769 | } else { |
aoqi@0 | 4770 | // Unknown exit code; pass it through |
aoqi@0 | 4771 | return status; |
aoqi@0 | 4772 | } |
aoqi@0 | 4773 | } |
aoqi@0 | 4774 | } |
aoqi@0 | 4775 | |
aoqi@0 | 4776 | // is_headless_jre() |
aoqi@0 | 4777 | // |
aoqi@0 | 4778 | // Test for the existence of xawt/libmawt.so or libawt_xawt.so |
aoqi@0 | 4779 | // in order to report if we are running in a headless jre |
aoqi@0 | 4780 | // |
aoqi@0 | 4781 | // Since JDK8 xawt/libmawt.so was moved into the same directory |
aoqi@0 | 4782 | // as libawt.so, and renamed libawt_xawt.so |
aoqi@0 | 4783 | // |
aoqi@0 | 4784 | bool os::is_headless_jre() { |
aoqi@0 | 4785 | #ifdef __APPLE__ |
aoqi@0 | 4786 | // We no longer build headless-only on Mac OS X |
aoqi@0 | 4787 | return false; |
aoqi@0 | 4788 | #else |
aoqi@0 | 4789 | struct stat statbuf; |
aoqi@0 | 4790 | char buf[MAXPATHLEN]; |
aoqi@0 | 4791 | char libmawtpath[MAXPATHLEN]; |
aoqi@0 | 4792 | const char *xawtstr = "/xawt/libmawt" JNI_LIB_SUFFIX; |
aoqi@0 | 4793 | const char *new_xawtstr = "/libawt_xawt" JNI_LIB_SUFFIX; |
aoqi@0 | 4794 | char *p; |
aoqi@0 | 4795 | |
aoqi@0 | 4796 | // Get path to libjvm.so |
aoqi@0 | 4797 | os::jvm_path(buf, sizeof(buf)); |
aoqi@0 | 4798 | |
aoqi@0 | 4799 | // Get rid of libjvm.so |
aoqi@0 | 4800 | p = strrchr(buf, '/'); |
aoqi@0 | 4801 | if (p == NULL) return false; |
aoqi@0 | 4802 | else *p = '\0'; |
aoqi@0 | 4803 | |
aoqi@0 | 4804 | // Get rid of client or server |
aoqi@0 | 4805 | p = strrchr(buf, '/'); |
aoqi@0 | 4806 | if (p == NULL) return false; |
aoqi@0 | 4807 | else *p = '\0'; |
aoqi@0 | 4808 | |
aoqi@0 | 4809 | // check xawt/libmawt.so |
aoqi@0 | 4810 | strcpy(libmawtpath, buf); |
aoqi@0 | 4811 | strcat(libmawtpath, xawtstr); |
aoqi@0 | 4812 | if (::stat(libmawtpath, &statbuf) == 0) return false; |
aoqi@0 | 4813 | |
aoqi@0 | 4814 | // check libawt_xawt.so |
aoqi@0 | 4815 | strcpy(libmawtpath, buf); |
aoqi@0 | 4816 | strcat(libmawtpath, new_xawtstr); |
aoqi@0 | 4817 | if (::stat(libmawtpath, &statbuf) == 0) return false; |
aoqi@0 | 4818 | |
aoqi@0 | 4819 | return true; |
aoqi@0 | 4820 | #endif |
aoqi@0 | 4821 | } |
aoqi@0 | 4822 | |
aoqi@0 | 4823 | // Get the default path to the core file |
aoqi@0 | 4824 | // Returns the length of the string |
aoqi@0 | 4825 | int os::get_core_path(char* buffer, size_t bufferSize) { |
aoqi@0 | 4826 | int n = jio_snprintf(buffer, bufferSize, "/cores"); |
aoqi@0 | 4827 | |
aoqi@0 | 4828 | // Truncate if theoretical string was longer than bufferSize |
aoqi@0 | 4829 | n = MIN2(n, (int)bufferSize); |
aoqi@0 | 4830 | |
aoqi@0 | 4831 | return n; |
aoqi@0 | 4832 | } |
aoqi@0 | 4833 | |
aoqi@0 | 4834 | #ifndef PRODUCT |
aoqi@0 | 4835 | void TestReserveMemorySpecial_test() { |
aoqi@0 | 4836 | // No tests available for this platform |
aoqi@0 | 4837 | } |
aoqi@0 | 4838 | #endif |