Mercurial > hg > truffle
annotate src/share/vm/runtime/vm_operations.cpp @ 4237:30b6720604d2
Undid expected failure for EscapeAnalysisTest.testMonitor2().
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 06 Jan 2012 15:35:52 +0100 |
parents | f08d439fab8c |
children | 0ebca2e35ca5 f34d701e952e |
rev | line source |
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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 } |