Mercurial > hg > truffle
annotate src/share/vm/runtime/vm_operations.cpp @ 9099:ed81c74f92ff
Cache boolean flags instead of full Annotation objects
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 12 Apr 2013 16:05:56 -0700 |
parents | 89e4d67fdd2a |
children | 836a62f43af9 |
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" | |
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37 #include "runtime/thread.inline.hpp" |
1972 | 38 #include "runtime/vm_operations.hpp" |
39 #include "services/threadService.hpp" | |
0 | 40 |
41 #define VM_OP_NAME_INITIALIZE(name) #name, | |
42 | |
43 const char* VM_Operation::_names[VM_Operation::VMOp_Terminating] = \ | |
44 { VM_OPS_DO(VM_OP_NAME_INITIALIZE) }; | |
45 | |
46 void VM_Operation::set_calling_thread(Thread* thread, ThreadPriority priority) { | |
47 _calling_thread = thread; | |
48 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
49 _priority = priority; | |
50 } | |
51 | |
52 | |
53 void VM_Operation::evaluate() { | |
54 ResourceMark rm; | |
55 if (TraceVMOperation) { | |
56 tty->print("["); | |
57 NOT_PRODUCT(print();) | |
58 } | |
59 doit(); | |
60 if (TraceVMOperation) { | |
61 tty->print_cr("]"); | |
62 } | |
63 } | |
64 | |
65 // Called by fatal error handler. | |
66 void VM_Operation::print_on_error(outputStream* st) const { | |
67 st->print("VM_Operation (" PTR_FORMAT "): ", this); | |
68 st->print("%s", name()); | |
69 | |
70 const char* mode; | |
71 switch(evaluation_mode()) { | |
72 case _safepoint : mode = "safepoint"; break; | |
73 case _no_safepoint : mode = "no safepoint"; break; | |
74 case _concurrent : mode = "concurrent"; break; | |
75 case _async_safepoint: mode = "async safepoint"; break; | |
76 default : mode = "unknown"; break; | |
77 } | |
78 st->print(", mode: %s", mode); | |
79 | |
80 if (calling_thread()) { | |
81 st->print(", requested by thread " PTR_FORMAT, calling_thread()); | |
82 } | |
83 } | |
84 | |
85 void VM_ThreadStop::doit() { | |
86 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
87 JavaThread* target = java_lang_Thread::thread(target_thread()); | |
88 // Note that this now allows multiple ThreadDeath exceptions to be | |
89 // thrown at a thread. | |
90 if (target != NULL) { | |
91 // the thread has run and is not already in the process of exiting | |
92 target->send_thread_stop(throwable()); | |
93 } | |
94 } | |
95 | |
96 void VM_Deoptimize::doit() { | |
97 // We do not want any GCs to happen while we are in the middle of this VM operation | |
98 ResourceMark rm; | |
99 DeoptimizationMarker dm; | |
100 | |
101 // Deoptimize all activations depending on marked nmethods | |
102 Deoptimization::deoptimize_dependents(); | |
103 | |
104 // Make the dependent methods zombies | |
105 CodeCache::make_marked_nmethods_zombies(); | |
106 } | |
107 | |
108 | |
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109 VM_DeoptimizeFrame::VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id, int reason) { |
0 | 110 _thread = thread; |
111 _id = id; | |
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112 _reason = reason; |
0 | 113 } |
114 | |
115 | |
116 void VM_DeoptimizeFrame::doit() { | |
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117 assert(_reason > Deoptimization::Reason_none && _reason < Deoptimization::Reason_LIMIT, "invalid deopt reason"); |
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118 Deoptimization::deoptimize_frame_internal(_thread, _id, (Deoptimization::DeoptReason)_reason); |
0 | 119 } |
120 | |
121 | |
122 #ifndef PRODUCT | |
123 | |
124 void VM_DeoptimizeAll::doit() { | |
125 DeoptimizationMarker dm; | |
126 // deoptimize all java threads in the system | |
127 if (DeoptimizeALot) { | |
128 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
129 if (thread->has_last_Java_frame()) { | |
130 thread->deoptimize(); | |
131 } | |
132 } | |
133 } else if (DeoptimizeRandom) { | |
134 | |
135 // Deoptimize some selected threads and frames | |
136 int tnum = os::random() & 0x3; | |
137 int fnum = os::random() & 0x3; | |
138 int tcount = 0; | |
139 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
140 if (thread->has_last_Java_frame()) { | |
141 if (tcount++ == tnum) { | |
142 tcount = 0; | |
143 int fcount = 0; | |
144 // Deoptimize some selected frames. | |
145 // Biased llocking wants a updated register map | |
146 for(StackFrameStream fst(thread, UseBiasedLocking); !fst.is_done(); fst.next()) { | |
147 if (fst.current()->can_be_deoptimized()) { | |
148 if (fcount++ == fnum) { | |
149 fcount = 0; | |
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150 Deoptimization::deoptimize(thread, *fst.current(), fst.register_map(), Deoptimization::Reason_constraint); |
0 | 151 } |
152 } | |
153 } | |
154 } | |
155 } | |
156 } | |
157 } | |
158 } | |
159 | |
160 | |
161 void VM_ZombieAll::doit() { | |
162 JavaThread *thread = (JavaThread *)calling_thread(); | |
163 assert(thread->is_Java_thread(), "must be a Java thread"); | |
164 thread->make_zombies(); | |
165 } | |
166 | |
167 #endif // !PRODUCT | |
168 | |
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169 void VM_UnlinkSymbols::doit() { |
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170 JavaThread *thread = (JavaThread *)calling_thread(); |
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171 assert(thread->is_Java_thread(), "must be a Java thread"); |
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172 SymbolTable::unlink(); |
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173 } |
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174 |
1202 | 175 void VM_HandleFullCodeCache::doit() { |
176 NMethodSweeper::speculative_disconnect_nmethods(_is_full); | |
177 } | |
178 | |
0 | 179 void VM_Verify::doit() { |
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180 Universe::heap()->prepare_for_verify(); |
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181 Universe::verify(_silent); |
0 | 182 } |
183 | |
184 bool VM_PrintThreads::doit_prologue() { | |
185 assert(Thread::current()->is_Java_thread(), "just checking"); | |
186 | |
187 // Make sure AbstractOwnableSynchronizer is loaded | |
188 if (JDK_Version::is_gte_jdk16x_version()) { | |
189 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
190 } | |
191 | |
192 // Get Heap_lock if concurrent locks will be dumped | |
193 if (_print_concurrent_locks) { | |
194 Heap_lock->lock(); | |
195 } | |
196 return true; | |
197 } | |
198 | |
199 void VM_PrintThreads::doit() { | |
200 Threads::print_on(_out, true, false, _print_concurrent_locks); | |
201 } | |
202 | |
203 void VM_PrintThreads::doit_epilogue() { | |
204 if (_print_concurrent_locks) { | |
205 // Release Heap_lock | |
206 Heap_lock->unlock(); | |
207 } | |
208 } | |
209 | |
210 void VM_PrintJNI::doit() { | |
211 JNIHandles::print_on(_out); | |
212 } | |
213 | |
214 VM_FindDeadlocks::~VM_FindDeadlocks() { | |
215 if (_deadlocks != NULL) { | |
216 DeadlockCycle* cycle = _deadlocks; | |
217 while (cycle != NULL) { | |
218 DeadlockCycle* d = cycle; | |
219 cycle = cycle->next(); | |
220 delete d; | |
221 } | |
222 } | |
223 } | |
224 | |
225 bool VM_FindDeadlocks::doit_prologue() { | |
226 assert(Thread::current()->is_Java_thread(), "just checking"); | |
227 | |
228 // Load AbstractOwnableSynchronizer class | |
229 if (_concurrent_locks && JDK_Version::is_gte_jdk16x_version()) { | |
230 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
231 } | |
232 | |
233 return true; | |
234 } | |
235 | |
236 void VM_FindDeadlocks::doit() { | |
237 _deadlocks = ThreadService::find_deadlocks_at_safepoint(_concurrent_locks); | |
238 if (_out != NULL) { | |
239 int num_deadlocks = 0; | |
240 for (DeadlockCycle* cycle = _deadlocks; cycle != NULL; cycle = cycle->next()) { | |
241 num_deadlocks++; | |
242 cycle->print_on(_out); | |
243 } | |
244 | |
245 if (num_deadlocks == 1) { | |
246 _out->print_cr("\nFound 1 deadlock.\n"); | |
247 _out->flush(); | |
248 } else if (num_deadlocks > 1) { | |
249 _out->print_cr("\nFound %d deadlocks.\n", num_deadlocks); | |
250 _out->flush(); | |
251 } | |
252 } | |
253 } | |
254 | |
255 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
256 int max_depth, | |
257 bool with_locked_monitors, | |
258 bool with_locked_synchronizers) { | |
259 _result = result; | |
260 _num_threads = 0; // 0 indicates all threads | |
261 _threads = NULL; | |
262 _result = result; | |
263 _max_depth = max_depth; | |
264 _with_locked_monitors = with_locked_monitors; | |
265 _with_locked_synchronizers = with_locked_synchronizers; | |
266 } | |
267 | |
268 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
269 GrowableArray<instanceHandle>* threads, | |
270 int num_threads, | |
271 int max_depth, | |
272 bool with_locked_monitors, | |
273 bool with_locked_synchronizers) { | |
274 _result = result; | |
275 _num_threads = num_threads; | |
276 _threads = threads; | |
277 _result = result; | |
278 _max_depth = max_depth; | |
279 _with_locked_monitors = with_locked_monitors; | |
280 _with_locked_synchronizers = with_locked_synchronizers; | |
281 } | |
282 | |
283 bool VM_ThreadDump::doit_prologue() { | |
284 assert(Thread::current()->is_Java_thread(), "just checking"); | |
285 | |
286 // Load AbstractOwnableSynchronizer class before taking thread snapshots | |
287 if (JDK_Version::is_gte_jdk16x_version()) { | |
288 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
289 } | |
290 | |
291 if (_with_locked_synchronizers) { | |
292 // Acquire Heap_lock to dump concurrent locks | |
293 Heap_lock->lock(); | |
294 } | |
295 | |
296 return true; | |
297 } | |
298 | |
299 void VM_ThreadDump::doit_epilogue() { | |
300 if (_with_locked_synchronizers) { | |
301 // Release Heap_lock | |
302 Heap_lock->unlock(); | |
303 } | |
304 } | |
305 | |
306 void VM_ThreadDump::doit() { | |
307 ResourceMark rm; | |
308 | |
309 ConcurrentLocksDump concurrent_locks(true); | |
310 if (_with_locked_synchronizers) { | |
311 concurrent_locks.dump_at_safepoint(); | |
312 } | |
313 | |
314 if (_num_threads == 0) { | |
315 // Snapshot all live threads | |
316 for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) { | |
317 if (jt->is_exiting() || | |
318 jt->is_hidden_from_external_view()) { | |
319 // skip terminating threads and hidden threads | |
320 continue; | |
321 } | |
322 ThreadConcurrentLocks* tcl = NULL; | |
323 if (_with_locked_synchronizers) { | |
324 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
325 } | |
326 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
327 _result->add_thread_snapshot(ts); | |
328 } | |
329 } else { | |
330 // Snapshot threads in the given _threads array | |
331 // A dummy snapshot is created if a thread doesn't exist | |
332 for (int i = 0; i < _num_threads; i++) { | |
333 instanceHandle th = _threads->at(i); | |
334 if (th() == NULL) { | |
335 // skip if the thread doesn't exist | |
336 // Add a dummy snapshot | |
337 _result->add_thread_snapshot(new ThreadSnapshot()); | |
338 continue; | |
339 } | |
340 | |
341 // Dump thread stack only if the thread is alive and not exiting | |
342 // and not VM internal thread. | |
343 JavaThread* jt = java_lang_Thread::thread(th()); | |
344 if (jt == NULL || /* thread not alive */ | |
345 jt->is_exiting() || | |
346 jt->is_hidden_from_external_view()) { | |
347 // add a NULL snapshot if skipped | |
348 _result->add_thread_snapshot(new ThreadSnapshot()); | |
349 continue; | |
350 } | |
351 ThreadConcurrentLocks* tcl = NULL; | |
352 if (_with_locked_synchronizers) { | |
353 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
354 } | |
355 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
356 _result->add_thread_snapshot(ts); | |
357 } | |
358 } | |
359 } | |
360 | |
361 ThreadSnapshot* VM_ThreadDump::snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl) { | |
362 ThreadSnapshot* snapshot = new ThreadSnapshot(java_thread); | |
363 snapshot->dump_stack_at_safepoint(_max_depth, _with_locked_monitors); | |
364 snapshot->set_concurrent_locks(tcl); | |
365 return snapshot; | |
366 } | |
367 | |
368 volatile bool VM_Exit::_vm_exited = false; | |
369 Thread * VM_Exit::_shutdown_thread = NULL; | |
370 | |
371 int VM_Exit::set_vm_exited() { | |
372 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
373 | |
374 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
375 | |
376 int num_active = 0; | |
377 | |
378 _shutdown_thread = thr_cur; | |
379 _vm_exited = true; // global flag | |
380 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) | |
381 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
382 ++num_active; | |
383 thr->set_terminated(JavaThread::_vm_exited); // per-thread flag | |
384 } | |
385 | |
386 return num_active; | |
387 } | |
388 | |
389 int VM_Exit::wait_for_threads_in_native_to_block() { | |
390 // VM exits at safepoint. This function must be called at the final safepoint | |
391 // to wait for threads in _thread_in_native state to be quiescent. | |
392 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
393 | |
394 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
395 Monitor timer(Mutex::leaf, "VM_Exit timer", true); | |
396 | |
397 // Compiler threads need longer wait because they can access VM data directly | |
398 // while in native. If they are active and some structures being used are | |
399 // deleted by the shutdown sequence, they will crash. On the other hand, user | |
400 // threads must go through native=>Java/VM transitions first to access VM | |
401 // data, and they will be stopped during state transition. In theory, we | |
402 // don't have to wait for user threads to be quiescent, but it's always | |
403 // better to terminate VM when current thread is the only active thread, so | |
404 // wait for user threads too. Numbers are in 10 milliseconds. | |
405 int max_wait_user_thread = 30; // at least 300 milliseconds | |
406 int max_wait_compiler_thread = 1000; // at least 10 seconds | |
407 | |
408 int max_wait = max_wait_compiler_thread; | |
409 | |
410 int attempts = 0; | |
411 while (true) { | |
412 int num_active = 0; | |
413 int num_active_compiler_thread = 0; | |
414 | |
415 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) { | |
416 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
417 num_active++; | |
418 if (thr->is_Compiler_thread()) { | |
419 num_active_compiler_thread++; | |
420 } | |
421 } | |
422 } | |
423 | |
424 if (num_active == 0) { | |
425 return 0; | |
426 } else if (attempts > max_wait) { | |
427 return num_active; | |
428 } else if (num_active_compiler_thread == 0 && attempts > max_wait_user_thread) { | |
429 return num_active; | |
430 } | |
431 | |
432 attempts++; | |
433 | |
434 MutexLockerEx ml(&timer, Mutex::_no_safepoint_check_flag); | |
435 timer.wait(Mutex::_no_safepoint_check_flag, 10); | |
436 } | |
437 } | |
438 | |
439 void VM_Exit::doit() { | |
440 CompileBroker::set_should_block(); | |
441 | |
442 // Wait for a short period for threads in native to block. Any thread | |
443 // still executing native code after the wait will be stopped at | |
444 // native==>Java/VM barriers. | |
445 // Among 16276 JCK tests, 94% of them come here without any threads still | |
446 // running in native; the other 6% are quiescent within 250ms (Ultra 80). | |
447 wait_for_threads_in_native_to_block(); | |
448 | |
449 set_vm_exited(); | |
450 | |
451 // cleanup globals resources before exiting. exit_globals() currently | |
452 // cleans up outputStream resources and PerfMemory resources. | |
453 exit_globals(); | |
454 | |
455 // Check for exit hook | |
456 exit_hook_t exit_hook = Arguments::exit_hook(); | |
457 if (exit_hook != NULL) { | |
458 // exit hook should exit. | |
459 exit_hook(_exit_code); | |
460 // ... but if it didn't, we must do it here | |
461 vm_direct_exit(_exit_code); | |
462 } else { | |
463 vm_direct_exit(_exit_code); | |
464 } | |
465 } | |
466 | |
467 | |
468 void VM_Exit::wait_if_vm_exited() { | |
469 if (_vm_exited && | |
470 ThreadLocalStorage::get_thread_slow() != _shutdown_thread) { | |
471 // _vm_exited is set at safepoint, and the Threads_lock is never released | |
472 // we will block here until the process dies | |
473 Threads_lock->lock_without_safepoint_check(); | |
474 ShouldNotReachHere(); | |
475 } | |
476 } |