Mercurial > hg > truffle
annotate src/share/vm/runtime/vm_operations.cpp @ 3763:e66f38dd58a9
Merge
author | ysr |
---|---|
date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | 1d1603768966 |
children | f08d439fab8c |
rev | line source |
---|---|
0 | 1 /* |
2426
1d1603768966
7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
trims
parents:
2177
diff
changeset
|
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 * | |
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1202
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1202
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1202
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
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" | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
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 | |
0 | 48 |
49 #define VM_OP_NAME_INITIALIZE(name) #name, | |
50 | |
51 const char* VM_Operation::_names[VM_Operation::VMOp_Terminating] = \ | |
52 { VM_OPS_DO(VM_OP_NAME_INITIALIZE) }; | |
53 | |
54 void VM_Operation::set_calling_thread(Thread* thread, ThreadPriority priority) { | |
55 _calling_thread = thread; | |
56 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
57 _priority = priority; | |
58 } | |
59 | |
60 | |
61 void VM_Operation::evaluate() { | |
62 ResourceMark rm; | |
63 if (TraceVMOperation) { | |
64 tty->print("["); | |
65 NOT_PRODUCT(print();) | |
66 } | |
67 doit(); | |
68 if (TraceVMOperation) { | |
69 tty->print_cr("]"); | |
70 } | |
71 } | |
72 | |
73 // Called by fatal error handler. | |
74 void VM_Operation::print_on_error(outputStream* st) const { | |
75 st->print("VM_Operation (" PTR_FORMAT "): ", this); | |
76 st->print("%s", name()); | |
77 | |
78 const char* mode; | |
79 switch(evaluation_mode()) { | |
80 case _safepoint : mode = "safepoint"; break; | |
81 case _no_safepoint : mode = "no safepoint"; break; | |
82 case _concurrent : mode = "concurrent"; break; | |
83 case _async_safepoint: mode = "async safepoint"; break; | |
84 default : mode = "unknown"; break; | |
85 } | |
86 st->print(", mode: %s", mode); | |
87 | |
88 if (calling_thread()) { | |
89 st->print(", requested by thread " PTR_FORMAT, calling_thread()); | |
90 } | |
91 } | |
92 | |
93 void VM_ThreadStop::doit() { | |
94 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint"); | |
95 JavaThread* target = java_lang_Thread::thread(target_thread()); | |
96 // Note that this now allows multiple ThreadDeath exceptions to be | |
97 // thrown at a thread. | |
98 if (target != NULL) { | |
99 // the thread has run and is not already in the process of exiting | |
100 target->send_thread_stop(throwable()); | |
101 } | |
102 } | |
103 | |
104 void VM_Deoptimize::doit() { | |
105 // We do not want any GCs to happen while we are in the middle of this VM operation | |
106 ResourceMark rm; | |
107 DeoptimizationMarker dm; | |
108 | |
109 // Deoptimize all activations depending on marked nmethods | |
110 Deoptimization::deoptimize_dependents(); | |
111 | |
112 // Make the dependent methods zombies | |
113 CodeCache::make_marked_nmethods_zombies(); | |
114 } | |
115 | |
116 | |
117 VM_DeoptimizeFrame::VM_DeoptimizeFrame(JavaThread* thread, intptr_t* id) { | |
118 _thread = thread; | |
119 _id = id; | |
120 } | |
121 | |
122 | |
123 void VM_DeoptimizeFrame::doit() { | |
1905
ce6848d0666d
6968367: can_post_on_exceptions is still using VM_DeoptimizeFrame in some places
never
parents:
1552
diff
changeset
|
124 Deoptimization::deoptimize_frame_internal(_thread, _id); |
0 | 125 } |
126 | |
127 | |
128 #ifndef PRODUCT | |
129 | |
130 void VM_DeoptimizeAll::doit() { | |
131 DeoptimizationMarker dm; | |
132 // deoptimize all java threads in the system | |
133 if (DeoptimizeALot) { | |
134 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
135 if (thread->has_last_Java_frame()) { | |
136 thread->deoptimize(); | |
137 } | |
138 } | |
139 } else if (DeoptimizeRandom) { | |
140 | |
141 // Deoptimize some selected threads and frames | |
142 int tnum = os::random() & 0x3; | |
143 int fnum = os::random() & 0x3; | |
144 int tcount = 0; | |
145 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
146 if (thread->has_last_Java_frame()) { | |
147 if (tcount++ == tnum) { | |
148 tcount = 0; | |
149 int fcount = 0; | |
150 // Deoptimize some selected frames. | |
151 // Biased llocking wants a updated register map | |
152 for(StackFrameStream fst(thread, UseBiasedLocking); !fst.is_done(); fst.next()) { | |
153 if (fst.current()->can_be_deoptimized()) { | |
154 if (fcount++ == fnum) { | |
155 fcount = 0; | |
156 Deoptimization::deoptimize(thread, *fst.current(), fst.register_map()); | |
157 } | |
158 } | |
159 } | |
160 } | |
161 } | |
162 } | |
163 } | |
164 } | |
165 | |
166 | |
167 void VM_ZombieAll::doit() { | |
168 JavaThread *thread = (JavaThread *)calling_thread(); | |
169 assert(thread->is_Java_thread(), "must be a Java thread"); | |
170 thread->make_zombies(); | |
171 } | |
172 | |
173 #endif // !PRODUCT | |
174 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
175 void VM_UnlinkSymbols::doit() { |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
176 JavaThread *thread = (JavaThread *)calling_thread(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
177 assert(thread->is_Java_thread(), "must be a Java thread"); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
178 SymbolTable::unlink(); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
179 } |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
1972
diff
changeset
|
180 |
1202 | 181 void VM_HandleFullCodeCache::doit() { |
182 NMethodSweeper::speculative_disconnect_nmethods(_is_full); | |
183 } | |
184 | |
0 | 185 void VM_Verify::doit() { |
186 Universe::verify(); | |
187 } | |
188 | |
189 bool VM_PrintThreads::doit_prologue() { | |
190 assert(Thread::current()->is_Java_thread(), "just checking"); | |
191 | |
192 // Make sure AbstractOwnableSynchronizer is loaded | |
193 if (JDK_Version::is_gte_jdk16x_version()) { | |
194 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
195 } | |
196 | |
197 // Get Heap_lock if concurrent locks will be dumped | |
198 if (_print_concurrent_locks) { | |
199 Heap_lock->lock(); | |
200 } | |
201 return true; | |
202 } | |
203 | |
204 void VM_PrintThreads::doit() { | |
205 Threads::print_on(_out, true, false, _print_concurrent_locks); | |
206 } | |
207 | |
208 void VM_PrintThreads::doit_epilogue() { | |
209 if (_print_concurrent_locks) { | |
210 // Release Heap_lock | |
211 Heap_lock->unlock(); | |
212 } | |
213 } | |
214 | |
215 void VM_PrintJNI::doit() { | |
216 JNIHandles::print_on(_out); | |
217 } | |
218 | |
219 VM_FindDeadlocks::~VM_FindDeadlocks() { | |
220 if (_deadlocks != NULL) { | |
221 DeadlockCycle* cycle = _deadlocks; | |
222 while (cycle != NULL) { | |
223 DeadlockCycle* d = cycle; | |
224 cycle = cycle->next(); | |
225 delete d; | |
226 } | |
227 } | |
228 } | |
229 | |
230 bool VM_FindDeadlocks::doit_prologue() { | |
231 assert(Thread::current()->is_Java_thread(), "just checking"); | |
232 | |
233 // Load AbstractOwnableSynchronizer class | |
234 if (_concurrent_locks && JDK_Version::is_gte_jdk16x_version()) { | |
235 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
236 } | |
237 | |
238 return true; | |
239 } | |
240 | |
241 void VM_FindDeadlocks::doit() { | |
242 _deadlocks = ThreadService::find_deadlocks_at_safepoint(_concurrent_locks); | |
243 if (_out != NULL) { | |
244 int num_deadlocks = 0; | |
245 for (DeadlockCycle* cycle = _deadlocks; cycle != NULL; cycle = cycle->next()) { | |
246 num_deadlocks++; | |
247 cycle->print_on(_out); | |
248 } | |
249 | |
250 if (num_deadlocks == 1) { | |
251 _out->print_cr("\nFound 1 deadlock.\n"); | |
252 _out->flush(); | |
253 } else if (num_deadlocks > 1) { | |
254 _out->print_cr("\nFound %d deadlocks.\n", num_deadlocks); | |
255 _out->flush(); | |
256 } | |
257 } | |
258 } | |
259 | |
260 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
261 int max_depth, | |
262 bool with_locked_monitors, | |
263 bool with_locked_synchronizers) { | |
264 _result = result; | |
265 _num_threads = 0; // 0 indicates all threads | |
266 _threads = NULL; | |
267 _result = result; | |
268 _max_depth = max_depth; | |
269 _with_locked_monitors = with_locked_monitors; | |
270 _with_locked_synchronizers = with_locked_synchronizers; | |
271 } | |
272 | |
273 VM_ThreadDump::VM_ThreadDump(ThreadDumpResult* result, | |
274 GrowableArray<instanceHandle>* threads, | |
275 int num_threads, | |
276 int max_depth, | |
277 bool with_locked_monitors, | |
278 bool with_locked_synchronizers) { | |
279 _result = result; | |
280 _num_threads = num_threads; | |
281 _threads = threads; | |
282 _result = result; | |
283 _max_depth = max_depth; | |
284 _with_locked_monitors = with_locked_monitors; | |
285 _with_locked_synchronizers = with_locked_synchronizers; | |
286 } | |
287 | |
288 bool VM_ThreadDump::doit_prologue() { | |
289 assert(Thread::current()->is_Java_thread(), "just checking"); | |
290 | |
291 // Load AbstractOwnableSynchronizer class before taking thread snapshots | |
292 if (JDK_Version::is_gte_jdk16x_version()) { | |
293 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(JavaThread::current()); | |
294 } | |
295 | |
296 if (_with_locked_synchronizers) { | |
297 // Acquire Heap_lock to dump concurrent locks | |
298 Heap_lock->lock(); | |
299 } | |
300 | |
301 return true; | |
302 } | |
303 | |
304 void VM_ThreadDump::doit_epilogue() { | |
305 if (_with_locked_synchronizers) { | |
306 // Release Heap_lock | |
307 Heap_lock->unlock(); | |
308 } | |
309 } | |
310 | |
311 void VM_ThreadDump::doit() { | |
312 ResourceMark rm; | |
313 | |
314 ConcurrentLocksDump concurrent_locks(true); | |
315 if (_with_locked_synchronizers) { | |
316 concurrent_locks.dump_at_safepoint(); | |
317 } | |
318 | |
319 if (_num_threads == 0) { | |
320 // Snapshot all live threads | |
321 for (JavaThread* jt = Threads::first(); jt != NULL; jt = jt->next()) { | |
322 if (jt->is_exiting() || | |
323 jt->is_hidden_from_external_view()) { | |
324 // skip terminating threads and hidden threads | |
325 continue; | |
326 } | |
327 ThreadConcurrentLocks* tcl = NULL; | |
328 if (_with_locked_synchronizers) { | |
329 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
330 } | |
331 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
332 _result->add_thread_snapshot(ts); | |
333 } | |
334 } else { | |
335 // Snapshot threads in the given _threads array | |
336 // A dummy snapshot is created if a thread doesn't exist | |
337 for (int i = 0; i < _num_threads; i++) { | |
338 instanceHandle th = _threads->at(i); | |
339 if (th() == NULL) { | |
340 // skip if the thread doesn't exist | |
341 // Add a dummy snapshot | |
342 _result->add_thread_snapshot(new ThreadSnapshot()); | |
343 continue; | |
344 } | |
345 | |
346 // Dump thread stack only if the thread is alive and not exiting | |
347 // and not VM internal thread. | |
348 JavaThread* jt = java_lang_Thread::thread(th()); | |
349 if (jt == NULL || /* thread not alive */ | |
350 jt->is_exiting() || | |
351 jt->is_hidden_from_external_view()) { | |
352 // add a NULL snapshot if skipped | |
353 _result->add_thread_snapshot(new ThreadSnapshot()); | |
354 continue; | |
355 } | |
356 ThreadConcurrentLocks* tcl = NULL; | |
357 if (_with_locked_synchronizers) { | |
358 tcl = concurrent_locks.thread_concurrent_locks(jt); | |
359 } | |
360 ThreadSnapshot* ts = snapshot_thread(jt, tcl); | |
361 _result->add_thread_snapshot(ts); | |
362 } | |
363 } | |
364 } | |
365 | |
366 ThreadSnapshot* VM_ThreadDump::snapshot_thread(JavaThread* java_thread, ThreadConcurrentLocks* tcl) { | |
367 ThreadSnapshot* snapshot = new ThreadSnapshot(java_thread); | |
368 snapshot->dump_stack_at_safepoint(_max_depth, _with_locked_monitors); | |
369 snapshot->set_concurrent_locks(tcl); | |
370 return snapshot; | |
371 } | |
372 | |
373 volatile bool VM_Exit::_vm_exited = false; | |
374 Thread * VM_Exit::_shutdown_thread = NULL; | |
375 | |
376 int VM_Exit::set_vm_exited() { | |
377 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
378 | |
379 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
380 | |
381 int num_active = 0; | |
382 | |
383 _shutdown_thread = thr_cur; | |
384 _vm_exited = true; // global flag | |
385 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) | |
386 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
387 ++num_active; | |
388 thr->set_terminated(JavaThread::_vm_exited); // per-thread flag | |
389 } | |
390 | |
391 return num_active; | |
392 } | |
393 | |
394 int VM_Exit::wait_for_threads_in_native_to_block() { | |
395 // VM exits at safepoint. This function must be called at the final safepoint | |
396 // to wait for threads in _thread_in_native state to be quiescent. | |
397 assert(SafepointSynchronize::is_at_safepoint(), "must be at safepoint already"); | |
398 | |
399 Thread * thr_cur = ThreadLocalStorage::get_thread_slow(); | |
400 Monitor timer(Mutex::leaf, "VM_Exit timer", true); | |
401 | |
402 // Compiler threads need longer wait because they can access VM data directly | |
403 // while in native. If they are active and some structures being used are | |
404 // deleted by the shutdown sequence, they will crash. On the other hand, user | |
405 // threads must go through native=>Java/VM transitions first to access VM | |
406 // data, and they will be stopped during state transition. In theory, we | |
407 // don't have to wait for user threads to be quiescent, but it's always | |
408 // better to terminate VM when current thread is the only active thread, so | |
409 // wait for user threads too. Numbers are in 10 milliseconds. | |
410 int max_wait_user_thread = 30; // at least 300 milliseconds | |
411 int max_wait_compiler_thread = 1000; // at least 10 seconds | |
412 | |
413 int max_wait = max_wait_compiler_thread; | |
414 | |
415 int attempts = 0; | |
416 while (true) { | |
417 int num_active = 0; | |
418 int num_active_compiler_thread = 0; | |
419 | |
420 for(JavaThread *thr = Threads::first(); thr != NULL; thr = thr->next()) { | |
421 if (thr!=thr_cur && thr->thread_state() == _thread_in_native) { | |
422 num_active++; | |
423 if (thr->is_Compiler_thread()) { | |
424 num_active_compiler_thread++; | |
425 } | |
426 } | |
427 } | |
428 | |
429 if (num_active == 0) { | |
430 return 0; | |
431 } else if (attempts > max_wait) { | |
432 return num_active; | |
433 } else if (num_active_compiler_thread == 0 && attempts > max_wait_user_thread) { | |
434 return num_active; | |
435 } | |
436 | |
437 attempts++; | |
438 | |
439 MutexLockerEx ml(&timer, Mutex::_no_safepoint_check_flag); | |
440 timer.wait(Mutex::_no_safepoint_check_flag, 10); | |
441 } | |
442 } | |
443 | |
444 void VM_Exit::doit() { | |
445 CompileBroker::set_should_block(); | |
446 | |
447 // Wait for a short period for threads in native to block. Any thread | |
448 // still executing native code after the wait will be stopped at | |
449 // native==>Java/VM barriers. | |
450 // Among 16276 JCK tests, 94% of them come here without any threads still | |
451 // running in native; the other 6% are quiescent within 250ms (Ultra 80). | |
452 wait_for_threads_in_native_to_block(); | |
453 | |
454 set_vm_exited(); | |
455 | |
456 // cleanup globals resources before exiting. exit_globals() currently | |
457 // cleans up outputStream resources and PerfMemory resources. | |
458 exit_globals(); | |
459 | |
460 // Check for exit hook | |
461 exit_hook_t exit_hook = Arguments::exit_hook(); | |
462 if (exit_hook != NULL) { | |
463 // exit hook should exit. | |
464 exit_hook(_exit_code); | |
465 // ... but if it didn't, we must do it here | |
466 vm_direct_exit(_exit_code); | |
467 } else { | |
468 vm_direct_exit(_exit_code); | |
469 } | |
470 } | |
471 | |
472 | |
473 void VM_Exit::wait_if_vm_exited() { | |
474 if (_vm_exited && | |
475 ThreadLocalStorage::get_thread_slow() != _shutdown_thread) { | |
476 // _vm_exited is set at safepoint, and the Threads_lock is never released | |
477 // we will block here until the process dies | |
478 Threads_lock->lock_without_safepoint_check(); | |
479 ShouldNotReachHere(); | |
480 } | |
481 } |