Mercurial > hg > truffle
annotate src/share/vm/runtime/vm_operations.cpp @ 4155:394404b2d9bd
Removed strict requirement for GRAAL environment variable. It only needs to be set now if the graal directory is not in the directory hierarchy of GraalVM JDK.
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Wed, 21 Dec 2011 11:25:27 +0100 |
| parents | f08d439fab8c |
| children | 0ebca2e35ca5 f34d701e952e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
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26 #include "classfile/symbolTable.hpp" |
| 1972 | 27 #include "classfile/vmSymbols.hpp" |
| 28 #include "compiler/compileBroker.hpp" | |
| 29 #include "compiler/compilerOracle.hpp" | |
| 30 #include "gc_implementation/shared/isGCActiveMark.hpp" | |
| 31 #include "memory/resourceArea.hpp" | |
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32 #include "oops/symbol.hpp" |
| 1972 | 33 #include "runtime/arguments.hpp" |
| 34 #include "runtime/deoptimization.hpp" | |
| 35 #include "runtime/interfaceSupport.hpp" | |
| 36 #include "runtime/sweeper.hpp" | |
| 37 #include "runtime/vm_operations.hpp" | |
| 38 #include "services/threadService.hpp" | |
| 39 #ifdef TARGET_OS_FAMILY_linux | |
| 40 # include "thread_linux.inline.hpp" | |
| 41 #endif | |
| 42 #ifdef TARGET_OS_FAMILY_solaris | |
| 43 # include "thread_solaris.inline.hpp" | |
| 44 #endif | |
| 45 #ifdef TARGET_OS_FAMILY_windows | |
| 46 # include "thread_windows.inline.hpp" | |
| 47 #endif | |
| 3960 | 48 #ifdef TARGET_OS_FAMILY_bsd |
| 49 # include "thread_bsd.inline.hpp" | |
| 50 #endif | |
| 0 | 51 |
| 52 #define VM_OP_NAME_INITIALIZE(name) #name, | |
| 53 | |
| 54 const char* VM_Operation::_names[VM_Operation::VMOp_Terminating] = \ | |
| 55 { VM_OPS_DO(VM_OP_NAME_INITIALIZE) }; | |
| 56 | |
| 57 void VM_Operation::set_calling_thread(Thread* thread, ThreadPriority priority) { | |
| 58 _calling_thread = thread; | |
| 59 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
| 60 _priority = priority; | |
| 61 } | |
| 62 | |
| 63 | |
| 64 void VM_Operation::evaluate() { | |
| 65 ResourceMark rm; | |
| 66 if (TraceVMOperation) { | |
| 67 tty->print("["); | |
| 68 NOT_PRODUCT(print();) | |
| 69 } | |
| 70 doit(); | |
| 71 if (TraceVMOperation) { | |
| 72 tty->print_cr("]"); | |
| 73 } | |
| 74 } | |
| 75 | |
| 76 // Called by fatal error handler. | |
| 77 void VM_Operation::print_on_error(outputStream* st) const { | |
| 78 st->print("VM_Operation (" PTR_FORMAT "): ", this); | |
| 79 st->print("%s", name()); | |
| 80 | |
| 81 const char* mode; | |
| 82 switch(evaluation_mode()) { | |
| 83 case _safepoint : mode = "safepoint"; break; | |
| 84 case _no_safepoint : mode = "no safepoint"; break; | |
| 85 case _concurrent : mode = "concurrent"; break; | |
| 86 case _async_safepoint: mode = "async safepoint"; break; | |
| 87 default : mode = "unknown"; break; | |
| 88 } | |
| 89 st->print(", mode: %s", mode); | |
| 90 | |
| 91 if (calling_thread()) { | |
| 92 st->print(", requested by thread " PTR_FORMAT, calling_thread()); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 void VM_ThreadStop::doit() { | |
| 97 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
| 98 JavaThread* target = java_lang_Thread::thread(target_thread()); | |
| 99 // Note that this now allows multiple ThreadDeath exceptions to be | |
| 100 // thrown at a thread. | |
| 101 if (target != NULL) { | |
| 102 // the thread has run and is not already in the process of exiting | |
| 103 target->send_thread_stop(throwable()); | |
| 104 } | |
| 105 } | |
| 106 | |
| 107 void VM_Deoptimize::doit() { | |
| 108 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 109 ResourceMark rm; | |
| 110 DeoptimizationMarker dm; | |
| 111 | |
| 112 // Deoptimize all activations depending on marked nmethods | |
| 113 Deoptimization::deoptimize_dependents(); | |
| 114 | |
| 115 // Make the dependent methods zombies | |
| 116 CodeCache::make_marked_nmethods_zombies(); | |
| 117 } | |
| 118 | |
| 119 | |
| 120 VM_DeoptimizeFrame::VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id) { | |
| 121 _thread = thread; | |
| 122 _id = id; | |
| 123 } | |
| 124 | |
| 125 | |
| 126 void VM_DeoptimizeFrame::doit() { | |
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127 Deoptimization::deoptimize_frame_internal(_thread, _id); |
| 0 | 128 } |
| 129 | |
| 130 | |
| 131 #ifndef PRODUCT | |
| 132 | |
| 133 void VM_DeoptimizeAll::doit() { | |
| 134 DeoptimizationMarker dm; | |
| 135 // deoptimize all java threads in the system | |
| 136 if (DeoptimizeALot) { | |
| 137 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 138 if (thread->has_last_Java_frame()) { | |
| 139 thread->deoptimize(); | |
| 140 } | |
| 141 } | |
| 142 } else if (DeoptimizeRandom) { | |
| 143 | |
| 144 // Deoptimize some selected threads and frames | |
| 145 int tnum = os::random() & 0x3; | |
| 146 int fnum = os::random() & 0x3; | |
| 147 int tcount = 0; | |
| 148 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 149 if (thread->has_last_Java_frame()) { | |
| 150 if (tcount++ == tnum) { | |
| 151 tcount = 0; | |
| 152 int fcount = 0; | |
| 153 // Deoptimize some selected frames. | |
| 154 // Biased llocking wants a updated register map | |
| 155 for(StackFrameStream fst(thread, UseBiasedLocking); !fst.is_done(); fst.next()) { | |
| 156 if (fst.current()->can_be_deoptimized()) { | |
| 157 if (fcount++ == fnum) { | |
| 158 fcount = 0; | |
| 159 Deoptimization::deoptimize(thread, *fst.current(), fst.register_map()); | |
| 160 } | |
| 161 } | |
| 162 } | |
| 163 } | |
| 164 } | |
| 165 } | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 | |
| 170 void VM_ZombieAll::doit() { | |
| 171 JavaThread *thread = (JavaThread *)calling_thread(); | |
| 172 assert(thread->is_Java_thread(), "must be a Java thread"); | |
| 173 thread->make_zombies(); | |
| 174 } | |
| 175 | |
| 176 #endif // !PRODUCT | |
| 177 | |
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178 void VM_UnlinkSymbols::doit() { |
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179 JavaThread *thread = (JavaThread *)calling_thread(); |
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180 assert(thread->is_Java_thread(), "must be a Java thread"); |
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181 SymbolTable::unlink(); |
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182 } |
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183 |
| 1202 | 184 void VM_HandleFullCodeCache::doit() { |
| 185 NMethodSweeper::speculative_disconnect_nmethods(_is_full); | |
| 186 } | |
| 187 | |
| 0 | 188 void VM_Verify::doit() { |
| 189 Universe::verify(); | |
| 190 } | |
| 191 | |
| 192 bool VM_PrintThreads::doit_prologue() { | |
| 193 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 194 | |
| 195 // Make sure AbstractOwnableSynchronizer is loaded | |
| 196 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 197 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
| 198 } | |
| 199 | |
| 200 // Get Heap_lock if concurrent locks will be dumped | |
| 201 if (_print_concurrent_locks) { | |
| 202 Heap_lock->lock(); | |
| 203 } | |
| 204 return true; | |
| 205 } | |
| 206 | |
| 207 void VM_PrintThreads::doit() { | |
| 208 Threads::print_on(_out, true, false, _print_concurrent_locks); | |
| 209 } | |
| 210 | |
| 211 void VM_PrintThreads::doit_epilogue() { | |
| 212 if (_print_concurrent_locks) { | |
| 213 // Release Heap_lock | |
| 214 Heap_lock->unlock(); | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 void VM_PrintJNI::doit() { | |
| 219 JNIHandles::print_on(_out); | |
| 220 } | |
| 221 | |
| 222 VM_FindDeadlocks::~VM_FindDeadlocks() { | |
| 223 if (_deadlocks != NULL) { | |
| 224 DeadlockCycle* cycle = _deadlocks; | |
| 225 while (cycle != NULL) { | |
| 226 DeadlockCycle* d = cycle; | |
| 227 cycle = cycle->next(); | |
| 228 delete d; | |
| 229 } | |
| 230 } | |
| 231 } | |
| 232 | |
| 233 bool VM_FindDeadlocks::doit_prologue() { | |
| 234 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 235 | |
| 236 // Load AbstractOwnableSynchronizer class | |
| 237 if (_concurrent_locks && JDK_Version::is_gte_jdk16x_version()) { | |
| 238 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
| 239 } | |
| 240 | |
| 241 return true; | |
| 242 } | |
| 243 | |
| 244 void VM_FindDeadlocks::doit() { | |
| 245 _deadlocks = ThreadService::find_deadlocks_at_safepoint(_concurrent_locks); | |
| 246 if (_out != NULL) { | |
| 247 int num_deadlocks = 0; | |
| 248 for (DeadlockCycle* cycle = _deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 249 num_deadlocks++; | |
| 250 cycle->print_on(_out); | |
| 251 } | |
| 252 | |
| 253 if (num_deadlocks == 1) { | |
| 254 _out->print_cr("\nFound 1 deadlock.\n"); | |
| 255 _out->flush(); | |
| 256 } else if (num_deadlocks > 1) { | |
| 257 _out->print_cr("\nFound %d deadlocks.\n", num_deadlocks); | |
| 258 _out->flush(); | |
| 259 } | |
| 260 } | |
| 261 } | |
| 262 | |
| 263 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
| 264 int max_depth, | |
| 265 bool with_locked_monitors, | |
| 266 bool with_locked_synchronizers) { | |
| 267 _result = result; | |
| 268 _num_threads = 0; // 0 indicates all threads | |
| 269 _threads = NULL; | |
| 270 _result = result; | |
| 271 _max_depth = max_depth; | |
| 272 _with_locked_monitors = with_locked_monitors; | |
| 273 _with_locked_synchronizers = with_locked_synchronizers; | |
| 274 } | |
| 275 | |
| 276 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
| 277 GrowableArray<instanceHandle>* threads, | |
| 278 int num_threads, | |
| 279 int max_depth, | |
| 280 bool with_locked_monitors, | |
| 281 bool with_locked_synchronizers) { | |
| 282 _result = result; | |
| 283 _num_threads = num_threads; | |
| 284 _threads = threads; | |
| 285 _result = result; | |
| 286 _max_depth = max_depth; | |
| 287 _with_locked_monitors = with_locked_monitors; | |
| 288 _with_locked_synchronizers = with_locked_synchronizers; | |
| 289 } | |
| 290 | |
| 291 bool VM_ThreadDump::doit_prologue() { | |
| 292 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 293 | |
| 294 // Load AbstractOwnableSynchronizer class before taking thread snapshots | |
| 295 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 296 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
| 297 } | |
| 298 | |
| 299 if (_with_locked_synchronizers) { | |
| 300 // Acquire Heap_lock to dump concurrent locks | |
| 301 Heap_lock->lock(); | |
| 302 } | |
| 303 | |
| 304 return true; | |
| 305 } | |
| 306 | |
| 307 void VM_ThreadDump::doit_epilogue() { | |
| 308 if (_with_locked_synchronizers) { | |
| 309 // Release Heap_lock | |
| 310 Heap_lock->unlock(); | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 void VM_ThreadDump::doit() { | |
| 315 ResourceMark rm; | |
| 316 | |
| 317 ConcurrentLocksDump concurrent_locks(true); | |
| 318 if (_with_locked_synchronizers) { | |
| 319 concurrent_locks.dump_at_safepoint(); | |
| 320 } | |
| 321 | |
| 322 if (_num_threads == 0) { | |
| 323 // Snapshot all live threads | |
| 324 for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) { | |
| 325 if (jt->is_exiting() || | |
| 326 jt->is_hidden_from_external_view()) { | |
| 327 // skip terminating threads and hidden threads | |
| 328 continue; | |
| 329 } | |
| 330 ThreadConcurrentLocks* tcl = NULL; | |
| 331 if (_with_locked_synchronizers) { | |
| 332 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
| 333 } | |
| 334 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
| 335 _result->add_thread_snapshot(ts); | |
| 336 } | |
| 337 } else { | |
| 338 // Snapshot threads in the given _threads array | |
| 339 // A dummy snapshot is created if a thread doesn't exist | |
| 340 for (int i = 0; i < _num_threads; i++) { | |
| 341 instanceHandle th = _threads->at(i); | |
| 342 if (th() == NULL) { | |
| 343 // skip if the thread doesn't exist | |
| 344 // Add a dummy snapshot | |
| 345 _result->add_thread_snapshot(new ThreadSnapshot()); | |
| 346 continue; | |
| 347 } | |
| 348 | |
| 349 // Dump thread stack only if the thread is alive and not exiting | |
| 350 // and not VM internal thread. | |
| 351 JavaThread* jt = java_lang_Thread::thread(th()); | |
| 352 if (jt == NULL || /* thread not alive */ | |
| 353 jt->is_exiting() || | |
| 354 jt->is_hidden_from_external_view()) { | |
| 355 // add a NULL snapshot if skipped | |
| 356 _result->add_thread_snapshot(new ThreadSnapshot()); | |
| 357 continue; | |
| 358 } | |
| 359 ThreadConcurrentLocks* tcl = NULL; | |
| 360 if (_with_locked_synchronizers) { | |
| 361 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
| 362 } | |
| 363 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
| 364 _result->add_thread_snapshot(ts); | |
| 365 } | |
| 366 } | |
| 367 } | |
| 368 | |
| 369 ThreadSnapshot* VM_ThreadDump::snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl) { | |
| 370 ThreadSnapshot* snapshot = new ThreadSnapshot(java_thread); | |
| 371 snapshot->dump_stack_at_safepoint(_max_depth, _with_locked_monitors); | |
| 372 snapshot->set_concurrent_locks(tcl); | |
| 373 return snapshot; | |
| 374 } | |
| 375 | |
| 376 volatile bool VM_Exit::_vm_exited = false; | |
| 377 Thread * VM_Exit::_shutdown_thread = NULL; | |
| 378 | |
| 379 int VM_Exit::set_vm_exited() { | |
| 380 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
| 381 | |
| 382 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
| 383 | |
| 384 int num_active = 0; | |
| 385 | |
| 386 _shutdown_thread = thr_cur; | |
| 387 _vm_exited = true; // global flag | |
| 388 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) | |
| 389 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
| 390 ++num_active; | |
| 391 thr->set_terminated(JavaThread::_vm_exited); // per-thread flag | |
| 392 } | |
| 393 | |
| 394 return num_active; | |
| 395 } | |
| 396 | |
| 397 int VM_Exit::wait_for_threads_in_native_to_block() { | |
| 398 // VM exits at safepoint. This function must be called at the final safepoint | |
| 399 // to wait for threads in _thread_in_native state to be quiescent. | |
| 400 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
| 401 | |
| 402 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
| 403 Monitor timer(Mutex::leaf, "VM_Exit timer", true); | |
| 404 | |
| 405 // Compiler threads need longer wait because they can access VM data directly | |
| 406 // while in native. If they are active and some structures being used are | |
| 407 // deleted by the shutdown sequence, they will crash. On the other hand, user | |
| 408 // threads must go through native=>Java/VM transitions first to access VM | |
| 409 // data, and they will be stopped during state transition. In theory, we | |
| 410 // don't have to wait for user threads to be quiescent, but it's always | |
| 411 // better to terminate VM when current thread is the only active thread, so | |
| 412 // wait for user threads too. Numbers are in 10 milliseconds. | |
| 413 int max_wait_user_thread = 30; // at least 300 milliseconds | |
| 414 int max_wait_compiler_thread = 1000; // at least 10 seconds | |
| 415 | |
| 416 int max_wait = max_wait_compiler_thread; | |
| 417 | |
| 418 int attempts = 0; | |
| 419 while (true) { | |
| 420 int num_active = 0; | |
| 421 int num_active_compiler_thread = 0; | |
| 422 | |
| 423 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) { | |
| 424 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
| 425 num_active++; | |
| 426 if (thr->is_Compiler_thread()) { | |
| 427 num_active_compiler_thread++; | |
| 428 } | |
| 429 } | |
| 430 } | |
| 431 | |
| 432 if (num_active == 0) { | |
| 433 return 0; | |
| 434 } else if (attempts > max_wait) { | |
| 435 return num_active; | |
| 436 } else if (num_active_compiler_thread == 0 && attempts > max_wait_user_thread) { | |
| 437 return num_active; | |
| 438 } | |
| 439 | |
| 440 attempts++; | |
| 441 | |
| 442 MutexLockerEx ml(&timer, Mutex::_no_safepoint_check_flag); | |
| 443 timer.wait(Mutex::_no_safepoint_check_flag, 10); | |
| 444 } | |
| 445 } | |
| 446 | |
| 447 void VM_Exit::doit() { | |
| 448 CompileBroker::set_should_block(); | |
| 449 | |
| 450 // Wait for a short period for threads in native to block. Any thread | |
| 451 // still executing native code after the wait will be stopped at | |
| 452 // native==>Java/VM barriers. | |
| 453 // Among 16276 JCK tests, 94% of them come here without any threads still | |
| 454 // running in native; the other 6% are quiescent within 250ms (Ultra 80). | |
| 455 wait_for_threads_in_native_to_block(); | |
| 456 | |
| 457 set_vm_exited(); | |
| 458 | |
| 459 // cleanup globals resources before exiting. exit_globals() currently | |
| 460 // cleans up outputStream resources and PerfMemory resources. | |
| 461 exit_globals(); | |
| 462 | |
| 463 // Check for exit hook | |
| 464 exit_hook_t exit_hook = Arguments::exit_hook(); | |
| 465 if (exit_hook != NULL) { | |
| 466 // exit hook should exit. | |
| 467 exit_hook(_exit_code); | |
| 468 // ... but if it didn't, we must do it here | |
| 469 vm_direct_exit(_exit_code); | |
| 470 } else { | |
| 471 vm_direct_exit(_exit_code); | |
| 472 } | |
| 473 } | |
| 474 | |
| 475 | |
| 476 void VM_Exit::wait_if_vm_exited() { | |
| 477 if (_vm_exited && | |
| 478 ThreadLocalStorage::get_thread_slow() != _shutdown_thread) { | |
| 479 // _vm_exited is set at safepoint, and the Threads_lock is never released | |
| 480 // we will block here until the process dies | |
| 481 Threads_lock->lock_without_safepoint_check(); | |
| 482 ShouldNotReachHere(); | |
| 483 } | |
| 484 } |