Mercurial > hg > truffle
annotate src/share/vm/runtime/vm_operations.cpp @ 13212:eb03a7335eb0
Use fixed instead of virtual register for target in far foreign call, since the register allocator does not support virtual registers to be used at call sites.
| author | Christian Wimmer <christian.wimmer@oracle.com> |
|---|---|
| date | Mon, 02 Dec 2013 14:20:32 -0800 |
| parents | 6b2d8d20ecbd |
| children | 52b4284cb496 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 10405 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #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" | |
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37 #include "runtime/thread.inline.hpp" |
| 1972 | 38 #include "runtime/vm_operations.hpp" |
| 39 #include "services/threadService.hpp" | |
| 10405 | 40 #include "trace/tracing.hpp" |
| 0 | 41 |
| 42 #define VM_OP_NAME_INITIALIZE(name) #name, | |
| 43 | |
| 44 const char* VM_Operation::_names[VM_Operation::VMOp_Terminating] = \ | |
| 45 { VM_OPS_DO(VM_OP_NAME_INITIALIZE) }; | |
| 46 | |
| 47 void VM_Operation::set_calling_thread(Thread* thread, ThreadPriority priority) { | |
| 48 _calling_thread = thread; | |
| 49 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
| 50 _priority = priority; | |
| 51 } | |
| 52 | |
| 53 | |
| 54 void VM_Operation::evaluate() { | |
| 55 ResourceMark rm; | |
| 56 if (TraceVMOperation) { | |
| 57 tty->print("["); | |
| 58 NOT_PRODUCT(print();) | |
| 59 } | |
| 60 doit(); | |
| 61 if (TraceVMOperation) { | |
| 62 tty->print_cr("]"); | |
| 63 } | |
| 64 } | |
| 65 | |
| 10405 | 66 const char* VM_Operation::mode_to_string(Mode mode) { |
| 67 switch(mode) { | |
| 68 case _safepoint : return "safepoint"; | |
| 69 case _no_safepoint : return "no safepoint"; | |
| 70 case _concurrent : return "concurrent"; | |
| 71 case _async_safepoint: return "async safepoint"; | |
| 72 default : return "unknown"; | |
| 73 } | |
| 74 } | |
| 0 | 75 // Called by fatal error handler. |
| 76 void VM_Operation::print_on_error(outputStream* st) const { | |
| 77 st->print("VM_Operation (" PTR_FORMAT "): ", this); | |
| 78 st->print("%s", name()); | |
| 79 | |
| 10405 | 80 const char* mode = mode_to_string(evaluation_mode()); |
| 0 | 81 st->print(", mode: %s", mode); |
| 82 | |
| 83 if (calling_thread()) { | |
| 84 st->print(", requested by thread " PTR_FORMAT, calling_thread()); | |
| 85 } | |
| 86 } | |
| 87 | |
| 88 void VM_ThreadStop::doit() { | |
| 89 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
| 90 JavaThread* target = java_lang_Thread::thread(target_thread()); | |
| 91 // Note that this now allows multiple ThreadDeath exceptions to be | |
| 92 // thrown at a thread. | |
| 93 if (target != NULL) { | |
| 94 // the thread has run and is not already in the process of exiting | |
| 95 target->send_thread_stop(throwable()); | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 void VM_Deoptimize::doit() { | |
| 100 // We do not want any GCs to happen while we are in the middle of this VM operation | |
| 101 ResourceMark rm; | |
| 102 DeoptimizationMarker dm; | |
| 103 | |
| 104 // Deoptimize all activations depending on marked nmethods | |
| 105 Deoptimization::deoptimize_dependents(); | |
| 106 | |
| 107 // Make the dependent methods zombies | |
| 108 CodeCache::make_marked_nmethods_zombies(); | |
| 109 } | |
| 110 | |
| 111 | |
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112 VM_DeoptimizeFrame::VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id, int reason) { |
| 0 | 113 _thread = thread; |
| 114 _id = id; | |
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115 _reason = reason; |
| 0 | 116 } |
| 117 | |
| 118 | |
| 119 void VM_DeoptimizeFrame::doit() { | |
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120 assert(_reason > Deoptimization::Reason_none && _reason < Deoptimization::Reason_LIMIT, "invalid deopt reason"); |
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121 Deoptimization::deoptimize_frame_internal(_thread, _id, (Deoptimization::DeoptReason)_reason); |
| 0 | 122 } |
| 123 | |
| 124 | |
| 125 #ifndef PRODUCT | |
| 126 | |
| 127 void VM_DeoptimizeAll::doit() { | |
| 128 DeoptimizationMarker dm; | |
| 129 // deoptimize all java threads in the system | |
| 130 if (DeoptimizeALot) { | |
| 131 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 132 if (thread->has_last_Java_frame()) { | |
| 133 thread->deoptimize(); | |
| 134 } | |
| 135 } | |
| 136 } else if (DeoptimizeRandom) { | |
| 137 | |
| 138 // Deoptimize some selected threads and frames | |
| 139 int tnum = os::random() & 0x3; | |
| 140 int fnum = os::random() & 0x3; | |
| 141 int tcount = 0; | |
| 142 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 143 if (thread->has_last_Java_frame()) { | |
| 144 if (tcount++ == tnum) { | |
| 145 tcount = 0; | |
| 146 int fcount = 0; | |
| 147 // Deoptimize some selected frames. | |
| 148 // Biased llocking wants a updated register map | |
| 149 for(StackFrameStream fst(thread, UseBiasedLocking); !fst.is_done(); fst.next()) { | |
| 150 if (fst.current()->can_be_deoptimized()) { | |
| 151 if (fcount++ == fnum) { | |
| 152 fcount = 0; | |
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153 Deoptimization::deoptimize(thread, *fst.current(), fst.register_map()); |
| 0 | 154 } |
| 155 } | |
| 156 } | |
| 157 } | |
| 158 } | |
| 159 } | |
| 160 } | |
| 161 } | |
| 162 | |
| 163 | |
| 164 void VM_ZombieAll::doit() { | |
| 165 JavaThread *thread = (JavaThread *)calling_thread(); | |
| 166 assert(thread->is_Java_thread(), "must be a Java thread"); | |
| 167 thread->make_zombies(); | |
| 168 } | |
| 169 | |
| 170 #endif // !PRODUCT | |
| 171 | |
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172 void VM_UnlinkSymbols::doit() { |
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173 JavaThread *thread = (JavaThread *)calling_thread(); |
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174 assert(thread->is_Java_thread(), "must be a Java thread"); |
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175 SymbolTable::unlink(); |
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176 } |
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177 |
| 0 | 178 void VM_Verify::doit() { |
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179 Universe::heap()->prepare_for_verify(); |
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180 Universe::verify(_silent); |
| 0 | 181 } |
| 182 | |
| 183 bool VM_PrintThreads::doit_prologue() { | |
| 184 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 185 | |
| 186 // Make sure AbstractOwnableSynchronizer is loaded | |
| 187 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 188 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
| 189 } | |
| 190 | |
| 191 // Get Heap_lock if concurrent locks will be dumped | |
| 192 if (_print_concurrent_locks) { | |
| 193 Heap_lock->lock(); | |
| 194 } | |
| 195 return true; | |
| 196 } | |
| 197 | |
| 198 void VM_PrintThreads::doit() { | |
| 199 Threads::print_on(_out, true, false, _print_concurrent_locks); | |
| 200 } | |
| 201 | |
| 202 void VM_PrintThreads::doit_epilogue() { | |
| 203 if (_print_concurrent_locks) { | |
| 204 // Release Heap_lock | |
| 205 Heap_lock->unlock(); | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 void VM_PrintJNI::doit() { | |
| 210 JNIHandles::print_on(_out); | |
| 211 } | |
| 212 | |
| 213 VM_FindDeadlocks::~VM_FindDeadlocks() { | |
| 214 if (_deadlocks != NULL) { | |
| 215 DeadlockCycle* cycle = _deadlocks; | |
| 216 while (cycle != NULL) { | |
| 217 DeadlockCycle* d = cycle; | |
| 218 cycle = cycle->next(); | |
| 219 delete d; | |
| 220 } | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 bool VM_FindDeadlocks::doit_prologue() { | |
| 225 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 226 | |
| 227 // Load AbstractOwnableSynchronizer class | |
| 228 if (_concurrent_locks && JDK_Version::is_gte_jdk16x_version()) { | |
| 229 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
| 230 } | |
| 231 | |
| 232 return true; | |
| 233 } | |
| 234 | |
| 235 void VM_FindDeadlocks::doit() { | |
| 236 _deadlocks = ThreadService::find_deadlocks_at_safepoint(_concurrent_locks); | |
| 237 if (_out != NULL) { | |
| 238 int num_deadlocks = 0; | |
| 239 for (DeadlockCycle* cycle = _deadlocks; cycle != NULL; cycle = cycle->next()) { | |
| 240 num_deadlocks++; | |
| 241 cycle->print_on(_out); | |
| 242 } | |
| 243 | |
| 244 if (num_deadlocks == 1) { | |
| 245 _out->print_cr("\nFound 1 deadlock.\n"); | |
| 246 _out->flush(); | |
| 247 } else if (num_deadlocks > 1) { | |
| 248 _out->print_cr("\nFound %d deadlocks.\n", num_deadlocks); | |
| 249 _out->flush(); | |
| 250 } | |
| 251 } | |
| 252 } | |
| 253 | |
| 254 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
| 255 int max_depth, | |
| 256 bool with_locked_monitors, | |
| 257 bool with_locked_synchronizers) { | |
| 258 _result = result; | |
| 259 _num_threads = 0; // 0 indicates all threads | |
| 260 _threads = NULL; | |
| 261 _result = result; | |
| 262 _max_depth = max_depth; | |
| 263 _with_locked_monitors = with_locked_monitors; | |
| 264 _with_locked_synchronizers = with_locked_synchronizers; | |
| 265 } | |
| 266 | |
| 267 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
| 268 GrowableArray<instanceHandle>* threads, | |
| 269 int num_threads, | |
| 270 int max_depth, | |
| 271 bool with_locked_monitors, | |
| 272 bool with_locked_synchronizers) { | |
| 273 _result = result; | |
| 274 _num_threads = num_threads; | |
| 275 _threads = threads; | |
| 276 _result = result; | |
| 277 _max_depth = max_depth; | |
| 278 _with_locked_monitors = with_locked_monitors; | |
| 279 _with_locked_synchronizers = with_locked_synchronizers; | |
| 280 } | |
| 281 | |
| 282 bool VM_ThreadDump::doit_prologue() { | |
| 283 assert(Thread::current()->is_Java_thread(), "just checking"); | |
| 284 | |
| 285 // Load AbstractOwnableSynchronizer class before taking thread snapshots | |
| 286 if (JDK_Version::is_gte_jdk16x_version()) { | |
| 287 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
| 288 } | |
| 289 | |
| 290 if (_with_locked_synchronizers) { | |
| 291 // Acquire Heap_lock to dump concurrent locks | |
| 292 Heap_lock->lock(); | |
| 293 } | |
| 294 | |
| 295 return true; | |
| 296 } | |
| 297 | |
| 298 void VM_ThreadDump::doit_epilogue() { | |
| 299 if (_with_locked_synchronizers) { | |
| 300 // Release Heap_lock | |
| 301 Heap_lock->unlock(); | |
| 302 } | |
| 303 } | |
| 304 | |
| 305 void VM_ThreadDump::doit() { | |
| 306 ResourceMark rm; | |
| 307 | |
| 308 ConcurrentLocksDump concurrent_locks(true); | |
| 309 if (_with_locked_synchronizers) { | |
| 310 concurrent_locks.dump_at_safepoint(); | |
| 311 } | |
| 312 | |
| 313 if (_num_threads == 0) { | |
| 314 // Snapshot all live threads | |
| 315 for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) { | |
| 316 if (jt->is_exiting() || | |
| 317 jt->is_hidden_from_external_view()) { | |
| 318 // skip terminating threads and hidden threads | |
| 319 continue; | |
| 320 } | |
| 321 ThreadConcurrentLocks* tcl = NULL; | |
| 322 if (_with_locked_synchronizers) { | |
| 323 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
| 324 } | |
| 325 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
| 326 _result->add_thread_snapshot(ts); | |
| 327 } | |
| 328 } else { | |
| 329 // Snapshot threads in the given _threads array | |
| 330 // A dummy snapshot is created if a thread doesn't exist | |
| 331 for (int i = 0; i < _num_threads; i++) { | |
| 332 instanceHandle th = _threads->at(i); | |
| 333 if (th() == NULL) { | |
| 334 // skip if the thread doesn't exist | |
| 335 // Add a dummy snapshot | |
| 336 _result->add_thread_snapshot(new ThreadSnapshot()); | |
| 337 continue; | |
| 338 } | |
| 339 | |
| 340 // Dump thread stack only if the thread is alive and not exiting | |
| 341 // and not VM internal thread. | |
| 342 JavaThread* jt = java_lang_Thread::thread(th()); | |
| 343 if (jt == NULL || /* thread not alive */ | |
| 344 jt->is_exiting() || | |
| 345 jt->is_hidden_from_external_view()) { | |
| 346 // add a NULL snapshot if skipped | |
| 347 _result->add_thread_snapshot(new ThreadSnapshot()); | |
| 348 continue; | |
| 349 } | |
| 350 ThreadConcurrentLocks* tcl = NULL; | |
| 351 if (_with_locked_synchronizers) { | |
| 352 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
| 353 } | |
| 354 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
| 355 _result->add_thread_snapshot(ts); | |
| 356 } | |
| 357 } | |
| 358 } | |
| 359 | |
| 360 ThreadSnapshot* VM_ThreadDump::snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl) { | |
| 361 ThreadSnapshot* snapshot = new ThreadSnapshot(java_thread); | |
| 362 snapshot->dump_stack_at_safepoint(_max_depth, _with_locked_monitors); | |
| 363 snapshot->set_concurrent_locks(tcl); | |
| 364 return snapshot; | |
| 365 } | |
| 366 | |
| 367 volatile bool VM_Exit::_vm_exited = false; | |
| 368 Thread * VM_Exit::_shutdown_thread = NULL; | |
| 369 | |
| 370 int VM_Exit::set_vm_exited() { | |
| 371 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
| 372 | |
| 373 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
| 374 | |
| 375 int num_active = 0; | |
| 376 | |
| 377 _shutdown_thread = thr_cur; | |
| 378 _vm_exited = true; // global flag | |
| 379 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) | |
| 380 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
| 381 ++num_active; | |
| 382 thr->set_terminated(JavaThread::_vm_exited); // per-thread flag | |
| 383 } | |
| 384 | |
| 385 return num_active; | |
| 386 } | |
| 387 | |
| 388 int VM_Exit::wait_for_threads_in_native_to_block() { | |
| 389 // VM exits at safepoint. This function must be called at the final safepoint | |
| 390 // to wait for threads in _thread_in_native state to be quiescent. | |
| 391 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
| 392 | |
| 393 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
| 394 Monitor timer(Mutex::leaf, "VM_Exit timer", true); | |
| 395 | |
| 396 // Compiler threads need longer wait because they can access VM data directly | |
| 397 // while in native. If they are active and some structures being used are | |
| 398 // deleted by the shutdown sequence, they will crash. On the other hand, user | |
| 399 // threads must go through native=>Java/VM transitions first to access VM | |
| 400 // data, and they will be stopped during state transition. In theory, we | |
| 401 // don't have to wait for user threads to be quiescent, but it's always | |
| 402 // better to terminate VM when current thread is the only active thread, so | |
| 403 // wait for user threads too. Numbers are in 10 milliseconds. | |
| 404 int max_wait_user_thread = 30; // at least 300 milliseconds | |
| 405 int max_wait_compiler_thread = 1000; // at least 10 seconds | |
| 406 | |
| 407 int max_wait = max_wait_compiler_thread; | |
| 408 | |
| 409 int attempts = 0; | |
| 410 while (true) { | |
| 411 int num_active = 0; | |
| 412 int num_active_compiler_thread = 0; | |
| 413 | |
| 414 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) { | |
| 415 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
| 416 num_active++; | |
| 417 if (thr->is_Compiler_thread()) { | |
| 418 num_active_compiler_thread++; | |
| 419 } | |
| 420 } | |
| 421 } | |
| 422 | |
| 423 if (num_active == 0) { | |
| 424 return 0; | |
| 425 } else if (attempts > max_wait) { | |
| 426 return num_active; | |
| 427 } else if (num_active_compiler_thread == 0 && attempts > max_wait_user_thread) { | |
| 428 return num_active; | |
| 429 } | |
| 430 | |
| 431 attempts++; | |
| 432 | |
| 433 MutexLockerEx ml(&timer, Mutex::_no_safepoint_check_flag); | |
| 434 timer.wait(Mutex::_no_safepoint_check_flag, 10); | |
| 435 } | |
| 436 } | |
| 437 | |
| 438 void VM_Exit::doit() { | |
| 439 CompileBroker::set_should_block(); | |
| 440 | |
| 441 // Wait for a short period for threads in native to block. Any thread | |
| 442 // still executing native code after the wait will be stopped at | |
| 443 // native==>Java/VM barriers. | |
| 444 // Among 16276 JCK tests, 94% of them come here without any threads still | |
| 445 // running in native; the other 6% are quiescent within 250ms (Ultra 80). | |
| 446 wait_for_threads_in_native_to_block(); | |
| 447 | |
| 448 set_vm_exited(); | |
| 449 | |
| 450 // cleanup globals resources before exiting. exit_globals() currently | |
| 451 // cleans up outputStream resources and PerfMemory resources. | |
| 452 exit_globals(); | |
| 453 | |
| 454 // Check for exit hook | |
| 455 exit_hook_t exit_hook = Arguments::exit_hook(); | |
| 456 if (exit_hook != NULL) { | |
| 457 // exit hook should exit. | |
| 458 exit_hook(_exit_code); | |
| 459 // ... but if it didn't, we must do it here | |
| 460 vm_direct_exit(_exit_code); | |
| 461 } else { | |
| 462 vm_direct_exit(_exit_code); | |
| 463 } | |
| 464 } | |
| 465 | |
| 466 | |
| 467 void VM_Exit::wait_if_vm_exited() { | |
| 468 if (_vm_exited && | |
| 469 ThreadLocalStorage::get_thread_slow() != _shutdown_thread) { | |
| 470 // _vm_exited is set at safepoint, and the Threads_lock is never released | |
| 471 // we will block here until the process dies | |
| 472 Threads_lock->lock_without_safepoint_check(); | |
| 473 ShouldNotReachHere(); | |
| 474 } | |
| 475 } |