Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.cpp @ 5928:541c4a5e7b88
7150390: JFR test crashed on assert(_jni_lock_count == count) failed: must be equal
Reviewed-by: dholmes, minqi, kvn, coleenp
author | never |
---|---|
date | Tue, 06 Mar 2012 16:32:23 -0800 |
parents | f1cb6f9cfe21 |
children | df4cd4aac5c1 |
rev | line source |
---|---|
0 | 1 /* |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4800
diff
changeset
|
2 * Copyright (c) 1997, 2012, 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:
1320
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1320
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:
1320
diff
changeset
|
21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classLoader.hpp" | |
27 #include "classfile/javaClasses.hpp" | |
28 #include "classfile/systemDictionary.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/compileBroker.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/linkResolver.hpp" | |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
34 #include "interpreter/oopMapCache.hpp" |
2126
db2b0f8c1cef
6814943: getcpool001 catches more than one JvmtiThreadState problem
kamg
parents:
2100
diff
changeset
|
35 #include "jvmtifiles/jvmtiEnv.hpp" |
4873
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
36 #include "memory/gcLocker.inline.hpp" |
1972 | 37 #include "memory/oopFactory.hpp" |
38 #include "memory/universe.inline.hpp" | |
39 #include "oops/instanceKlass.hpp" | |
40 #include "oops/objArrayOop.hpp" | |
41 #include "oops/oop.inline.hpp" | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
42 #include "oops/symbol.hpp" |
1972 | 43 #include "prims/jvm_misc.hpp" |
44 #include "prims/jvmtiExport.hpp" | |
45 #include "prims/jvmtiThreadState.hpp" | |
46 #include "prims/privilegedStack.hpp" | |
47 #include "runtime/aprofiler.hpp" | |
48 #include "runtime/arguments.hpp" | |
49 #include "runtime/biasedLocking.hpp" | |
50 #include "runtime/deoptimization.hpp" | |
51 #include "runtime/fprofiler.hpp" | |
52 #include "runtime/frame.inline.hpp" | |
53 #include "runtime/init.hpp" | |
54 #include "runtime/interfaceSupport.hpp" | |
55 #include "runtime/java.hpp" | |
56 #include "runtime/javaCalls.hpp" | |
57 #include "runtime/jniPeriodicChecker.hpp" | |
58 #include "runtime/memprofiler.hpp" | |
59 #include "runtime/mutexLocker.hpp" | |
60 #include "runtime/objectMonitor.hpp" | |
61 #include "runtime/osThread.hpp" | |
62 #include "runtime/safepoint.hpp" | |
63 #include "runtime/sharedRuntime.hpp" | |
64 #include "runtime/statSampler.hpp" | |
65 #include "runtime/stubRoutines.hpp" | |
66 #include "runtime/task.hpp" | |
67 #include "runtime/threadCritical.hpp" | |
68 #include "runtime/threadLocalStorage.hpp" | |
69 #include "runtime/vframe.hpp" | |
70 #include "runtime/vframeArray.hpp" | |
71 #include "runtime/vframe_hp.hpp" | |
72 #include "runtime/vmThread.hpp" | |
73 #include "runtime/vm_operations.hpp" | |
74 #include "services/attachListener.hpp" | |
75 #include "services/management.hpp" | |
76 #include "services/threadService.hpp" | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
77 #include "trace/traceEventTypes.hpp" |
1972 | 78 #include "utilities/defaultStream.hpp" |
79 #include "utilities/dtrace.hpp" | |
80 #include "utilities/events.hpp" | |
81 #include "utilities/preserveException.hpp" | |
82 #ifdef TARGET_OS_FAMILY_linux | |
83 # include "os_linux.inline.hpp" | |
84 # include "thread_linux.inline.hpp" | |
85 #endif | |
86 #ifdef TARGET_OS_FAMILY_solaris | |
87 # include "os_solaris.inline.hpp" | |
88 # include "thread_solaris.inline.hpp" | |
89 #endif | |
90 #ifdef TARGET_OS_FAMILY_windows | |
91 # include "os_windows.inline.hpp" | |
92 # include "thread_windows.inline.hpp" | |
93 #endif | |
3960 | 94 #ifdef TARGET_OS_FAMILY_bsd |
95 # include "os_bsd.inline.hpp" | |
96 # include "thread_bsd.inline.hpp" | |
97 #endif | |
1972 | 98 #ifndef SERIALGC |
99 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" | |
100 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
101 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
102 #endif | |
103 #ifdef COMPILER1 | |
104 #include "c1/c1_Compiler.hpp" | |
105 #endif | |
106 #ifdef COMPILER2 | |
107 #include "opto/c2compiler.hpp" | |
108 #include "opto/idealGraphPrinter.hpp" | |
109 #endif | |
0 | 110 |
111 #ifdef DTRACE_ENABLED | |
112 | |
113 // Only bother with this argument setup if dtrace is available | |
114 | |
4006 | 115 #ifndef USDT2 |
0 | 116 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
117 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); | |
118 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, | |
119 intptr_t, intptr_t, bool); | |
120 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, | |
121 intptr_t, intptr_t, bool); | |
122 | |
123 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
124 { \ | |
125 ResourceMark rm(this); \ | |
126 int len = 0; \ | |
127 const char* name = (javathread)->get_thread_name(); \ | |
128 len = strlen(name); \ | |
129 HS_DTRACE_PROBE5(hotspot, thread__##probe, \ | |
130 name, len, \ | |
131 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
132 (javathread)->osthread()->thread_id(), \ | |
133 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
134 } | |
135 | |
4006 | 136 #else /* USDT2 */ |
137 | |
138 #define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START | |
139 #define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP | |
140 | |
141 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
142 { \ | |
143 ResourceMark rm(this); \ | |
144 int len = 0; \ | |
145 const char* name = (javathread)->get_thread_name(); \ | |
146 len = strlen(name); \ | |
147 HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ | |
148 (char *) name, len, \ | |
149 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
150 (uintptr_t) (javathread)->osthread()->thread_id(), \ | |
151 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
152 } | |
153 | |
154 #endif /* USDT2 */ | |
155 | |
0 | 156 #else // ndef DTRACE_ENABLED |
157 | |
158 #define DTRACE_THREAD_PROBE(probe, javathread) | |
159 | |
160 #endif // ndef DTRACE_ENABLED | |
161 | |
162 // Class hierarchy | |
163 // - Thread | |
164 // - VMThread | |
165 // - WatcherThread | |
166 // - ConcurrentMarkSweepThread | |
167 // - JavaThread | |
168 // - CompilerThread | |
169 | |
170 // ======= Thread ======== | |
171 | |
172 // Support for forcing alignment of thread objects for biased locking | |
173 void* Thread::operator new(size_t size) { | |
174 if (UseBiasedLocking) { | |
175 const int alignment = markOopDesc::biased_lock_alignment; | |
176 size_t aligned_size = size + (alignment - sizeof(intptr_t)); | |
177 void* real_malloc_addr = CHeapObj::operator new(aligned_size); | |
178 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); | |
179 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= | |
180 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), | |
181 "JavaThread alignment code overflowed allocated storage"); | |
182 if (TraceBiasedLocking) { | |
183 if (aligned_addr != real_malloc_addr) | |
184 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, | |
185 real_malloc_addr, aligned_addr); | |
186 } | |
187 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; | |
188 return aligned_addr; | |
189 } else { | |
190 return CHeapObj::operator new(size); | |
191 } | |
192 } | |
193 | |
194 void Thread::operator delete(void* p) { | |
195 if (UseBiasedLocking) { | |
196 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; | |
197 CHeapObj::operator delete(real_malloc_addr); | |
198 } else { | |
199 CHeapObj::operator delete(p); | |
200 } | |
201 } | |
202 | |
203 | |
204 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, | |
205 // JavaThread | |
206 | |
207 | |
208 Thread::Thread() { | |
2100
b1a2afa37ec4
7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents:
2014
diff
changeset
|
209 // stack and get_thread |
b1a2afa37ec4
7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents:
2014
diff
changeset
|
210 set_stack_base(NULL); |
b1a2afa37ec4
7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents:
2014
diff
changeset
|
211 set_stack_size(0); |
b1a2afa37ec4
7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents:
2014
diff
changeset
|
212 set_self_raw_id(0); |
b1a2afa37ec4
7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents:
2014
diff
changeset
|
213 set_lgrp_id(-1); |
0 | 214 |
215 // allocated data structures | |
2100
b1a2afa37ec4
7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents:
2014
diff
changeset
|
216 set_osthread(NULL); |
0 | 217 set_resource_area(new ResourceArea()); |
218 set_handle_area(new HandleArea(NULL)); | |
219 set_active_handles(NULL); | |
220 set_free_handle_block(NULL); | |
221 set_last_handle_mark(NULL); | |
222 | |
223 // This initial value ==> never claimed. | |
224 _oops_do_parity = 0; | |
225 | |
226 // the handle mark links itself to last_handle_mark | |
227 new HandleMark(this); | |
228 | |
229 // plain initialization | |
230 debug_only(_owned_locks = NULL;) | |
231 debug_only(_allow_allocation_count = 0;) | |
232 NOT_PRODUCT(_allow_safepoint_count = 0;) | |
806
821269eca479
6820167: GCALotAtAllSafepoints + FullGCALot(ScavengeALot) options crash JVM
ysr
parents:
702
diff
changeset
|
233 NOT_PRODUCT(_skip_gcalot = false;) |
0 | 234 CHECK_UNHANDLED_OOPS_ONLY(_gc_locked_out_count = 0;) |
235 _jvmti_env_iteration_count = 0; | |
2100
b1a2afa37ec4
7003271: Hotspot should track cumulative Java heap bytes allocated on a per-thread basis
phh
parents:
2014
diff
changeset
|
236 set_allocated_bytes(0); |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
237 set_trace_buffer(NULL); |
0 | 238 _vm_operation_started_count = 0; |
239 _vm_operation_completed_count = 0; | |
240 _current_pending_monitor = NULL; | |
241 _current_pending_monitor_is_from_java = true; | |
242 _current_waiting_monitor = NULL; | |
243 _num_nested_signal = 0; | |
244 omFreeList = NULL ; | |
245 omFreeCount = 0 ; | |
246 omFreeProvision = 32 ; | |
1587 | 247 omInUseList = NULL ; |
248 omInUseCount = 0 ; | |
0 | 249 |
5928
541c4a5e7b88
7150390: JFR test crashed on assert(_jni_lock_count == count) failed: must be equal
never
parents:
4932
diff
changeset
|
250 #ifdef ASSERT |
541c4a5e7b88
7150390: JFR test crashed on assert(_jni_lock_count == count) failed: must be equal
never
parents:
4932
diff
changeset
|
251 _visited_for_critical_count = false; |
541c4a5e7b88
7150390: JFR test crashed on assert(_jni_lock_count == count) failed: must be equal
never
parents:
4932
diff
changeset
|
252 #endif |
541c4a5e7b88
7150390: JFR test crashed on assert(_jni_lock_count == count) failed: must be equal
never
parents:
4932
diff
changeset
|
253 |
0 | 254 _SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true); |
255 _suspend_flags = 0; | |
256 | |
257 // thread-specific hashCode stream generator state - Marsaglia shift-xor form | |
258 _hashStateX = os::random() ; | |
259 _hashStateY = 842502087 ; | |
260 _hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ; | |
261 _hashStateW = 273326509 ; | |
262 | |
263 _OnTrap = 0 ; | |
264 _schedctl = NULL ; | |
265 _Stalled = 0 ; | |
266 _TypeTag = 0x2BAD ; | |
267 | |
268 // Many of the following fields are effectively final - immutable | |
269 // Note that nascent threads can't use the Native Monitor-Mutex | |
270 // construct until the _MutexEvent is initialized ... | |
271 // CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents | |
272 // we might instead use a stack of ParkEvents that we could provision on-demand. | |
273 // The stack would act as a cache to avoid calls to ParkEvent::Allocate() | |
274 // and ::Release() | |
275 _ParkEvent = ParkEvent::Allocate (this) ; | |
276 _SleepEvent = ParkEvent::Allocate (this) ; | |
277 _MutexEvent = ParkEvent::Allocate (this) ; | |
278 _MuxEvent = ParkEvent::Allocate (this) ; | |
279 | |
280 #ifdef CHECK_UNHANDLED_OOPS | |
281 if (CheckUnhandledOops) { | |
282 _unhandled_oops = new UnhandledOops(this); | |
283 } | |
284 #endif // CHECK_UNHANDLED_OOPS | |
285 #ifdef ASSERT | |
286 if (UseBiasedLocking) { | |
287 assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed"); | |
288 assert(this == _real_malloc_address || | |
289 this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment), | |
290 "bug in forced alignment of thread objects"); | |
291 } | |
292 #endif /* ASSERT */ | |
293 } | |
294 | |
295 void Thread::initialize_thread_local_storage() { | |
296 // Note: Make sure this method only calls | |
297 // non-blocking operations. Otherwise, it might not work | |
298 // with the thread-startup/safepoint interaction. | |
299 | |
300 // During Java thread startup, safepoint code should allow this | |
301 // method to complete because it may need to allocate memory to | |
302 // store information for the new thread. | |
303 | |
304 // initialize structure dependent on thread local storage | |
305 ThreadLocalStorage::set_thread(this); | |
306 | |
307 // set up any platform-specific state. | |
308 os::initialize_thread(); | |
309 | |
310 } | |
311 | |
312 void Thread::record_stack_base_and_size() { | |
313 set_stack_base(os::current_stack_base()); | |
314 set_stack_size(os::current_stack_size()); | |
315 } | |
316 | |
317 | |
318 Thread::~Thread() { | |
319 // Reclaim the objectmonitors from the omFreeList of the moribund thread. | |
320 ObjectSynchronizer::omFlush (this) ; | |
321 | |
322 // deallocate data structures | |
323 delete resource_area(); | |
324 // since the handle marks are using the handle area, we have to deallocated the root | |
325 // handle mark before deallocating the thread's handle area, | |
326 assert(last_handle_mark() != NULL, "check we have an element"); | |
327 delete last_handle_mark(); | |
328 assert(last_handle_mark() == NULL, "check we have reached the end"); | |
329 | |
330 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. | |
331 // We NULL out the fields for good hygiene. | |
332 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; | |
333 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; | |
334 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; | |
335 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; | |
336 | |
337 delete handle_area(); | |
338 | |
339 // osthread() can be NULL, if creation of thread failed. | |
340 if (osthread() != NULL) os::free_thread(osthread()); | |
341 | |
342 delete _SR_lock; | |
343 | |
344 // clear thread local storage if the Thread is deleting itself | |
345 if (this == Thread::current()) { | |
346 ThreadLocalStorage::set_thread(NULL); | |
347 } else { | |
348 // In the case where we're not the current thread, invalidate all the | |
349 // caches in case some code tries to get the current thread or the | |
350 // thread that was destroyed, and gets stale information. | |
351 ThreadLocalStorage::invalidate_all(); | |
352 } | |
353 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) | |
354 } | |
355 | |
356 // NOTE: dummy function for assertion purpose. | |
357 void Thread::run() { | |
358 ShouldNotReachHere(); | |
359 } | |
360 | |
361 #ifdef ASSERT | |
362 // Private method to check for dangling thread pointer | |
363 void check_for_dangling_thread_pointer(Thread *thread) { | |
364 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
365 "possibility of dangling Thread pointer"); | |
366 } | |
367 #endif | |
368 | |
369 | |
370 #ifndef PRODUCT | |
371 // Tracing method for basic thread operations | |
372 void Thread::trace(const char* msg, const Thread* const thread) { | |
373 if (!TraceThreadEvents) return; | |
374 ResourceMark rm; | |
375 ThreadCritical tc; | |
376 const char *name = "non-Java thread"; | |
377 int prio = -1; | |
378 if (thread->is_Java_thread() | |
379 && !thread->is_Compiler_thread()) { | |
380 // The Threads_lock must be held to get information about | |
381 // this thread but may not be in some situations when | |
382 // tracing thread events. | |
383 bool release_Threads_lock = false; | |
384 if (!Threads_lock->owned_by_self()) { | |
385 Threads_lock->lock(); | |
386 release_Threads_lock = true; | |
387 } | |
388 JavaThread* jt = (JavaThread *)thread; | |
389 name = (char *)jt->get_thread_name(); | |
390 oop thread_oop = jt->threadObj(); | |
391 if (thread_oop != NULL) { | |
392 prio = java_lang_Thread::priority(thread_oop); | |
393 } | |
394 if (release_Threads_lock) { | |
395 Threads_lock->unlock(); | |
396 } | |
397 } | |
398 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); | |
399 } | |
400 #endif | |
401 | |
402 | |
403 ThreadPriority Thread::get_priority(const Thread* const thread) { | |
404 trace("get priority", thread); | |
405 ThreadPriority priority; | |
406 // Can return an error! | |
407 (void)os::get_priority(thread, priority); | |
408 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); | |
409 return priority; | |
410 } | |
411 | |
412 void Thread::set_priority(Thread* thread, ThreadPriority priority) { | |
413 trace("set priority", thread); | |
414 debug_only(check_for_dangling_thread_pointer(thread);) | |
415 // Can return an error! | |
416 (void)os::set_priority(thread, priority); | |
417 } | |
418 | |
419 | |
420 void Thread::start(Thread* thread) { | |
421 trace("start", thread); | |
422 // Start is different from resume in that its safety is guaranteed by context or | |
423 // being called from a Java method synchronized on the Thread object. | |
424 if (!DisableStartThread) { | |
425 if (thread->is_Java_thread()) { | |
426 // Initialize the thread state to RUNNABLE before starting this thread. | |
427 // Can not set it after the thread started because we do not know the | |
428 // exact thread state at that time. It could be in MONITOR_WAIT or | |
429 // in SLEEPING or some other state. | |
430 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), | |
431 java_lang_Thread::RUNNABLE); | |
432 } | |
433 os::start_thread(thread); | |
434 } | |
435 } | |
436 | |
437 // Enqueue a VM_Operation to do the job for us - sometime later | |
438 void Thread::send_async_exception(oop java_thread, oop java_throwable) { | |
439 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); | |
440 VMThread::execute(vm_stop); | |
441 } | |
442 | |
443 | |
444 // | |
445 // Check if an external suspend request has completed (or has been | |
446 // cancelled). Returns true if the thread is externally suspended and | |
447 // false otherwise. | |
448 // | |
449 // The bits parameter returns information about the code path through | |
450 // the routine. Useful for debugging: | |
451 // | |
452 // set in is_ext_suspend_completed(): | |
453 // 0x00000001 - routine was entered | |
454 // 0x00000010 - routine return false at end | |
455 // 0x00000100 - thread exited (return false) | |
456 // 0x00000200 - suspend request cancelled (return false) | |
457 // 0x00000400 - thread suspended (return true) | |
458 // 0x00001000 - thread is in a suspend equivalent state (return true) | |
459 // 0x00002000 - thread is native and walkable (return true) | |
460 // 0x00004000 - thread is native_trans and walkable (needed retry) | |
461 // | |
462 // set in wait_for_ext_suspend_completion(): | |
463 // 0x00010000 - routine was entered | |
464 // 0x00020000 - suspend request cancelled before loop (return false) | |
465 // 0x00040000 - thread suspended before loop (return true) | |
466 // 0x00080000 - suspend request cancelled in loop (return false) | |
467 // 0x00100000 - thread suspended in loop (return true) | |
468 // 0x00200000 - suspend not completed during retry loop (return false) | |
469 // | |
470 | |
471 // Helper class for tracing suspend wait debug bits. | |
472 // | |
473 // 0x00000100 indicates that the target thread exited before it could | |
474 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and | |
475 // 0x00080000 each indicate a cancelled suspend request so they don't | |
476 // count as wait failures either. | |
477 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) | |
478 | |
479 class TraceSuspendDebugBits : public StackObj { | |
480 private: | |
481 JavaThread * jt; | |
482 bool is_wait; | |
483 bool called_by_wait; // meaningful when !is_wait | |
484 uint32_t * bits; | |
485 | |
486 public: | |
487 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, | |
488 uint32_t *_bits) { | |
489 jt = _jt; | |
490 is_wait = _is_wait; | |
491 called_by_wait = _called_by_wait; | |
492 bits = _bits; | |
493 } | |
494 | |
495 ~TraceSuspendDebugBits() { | |
496 if (!is_wait) { | |
497 #if 1 | |
498 // By default, don't trace bits for is_ext_suspend_completed() calls. | |
499 // That trace is very chatty. | |
500 return; | |
501 #else | |
502 if (!called_by_wait) { | |
503 // If tracing for is_ext_suspend_completed() is enabled, then only | |
504 // trace calls to it from wait_for_ext_suspend_completion() | |
505 return; | |
506 } | |
507 #endif | |
508 } | |
509 | |
510 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { | |
511 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { | |
512 MutexLocker ml(Threads_lock); // needed for get_thread_name() | |
513 ResourceMark rm; | |
514 | |
515 tty->print_cr( | |
516 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", | |
517 jt->get_thread_name(), *bits); | |
518 | |
519 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); | |
520 } | |
521 } | |
522 } | |
523 }; | |
524 #undef DEBUG_FALSE_BITS | |
525 | |
526 | |
527 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { | |
528 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); | |
529 | |
530 bool did_trans_retry = false; // only do thread_in_native_trans retry once | |
531 bool do_trans_retry; // flag to force the retry | |
532 | |
533 *bits |= 0x00000001; | |
534 | |
535 do { | |
536 do_trans_retry = false; | |
537 | |
538 if (is_exiting()) { | |
539 // Thread is in the process of exiting. This is always checked | |
540 // first to reduce the risk of dereferencing a freed JavaThread. | |
541 *bits |= 0x00000100; | |
542 return false; | |
543 } | |
544 | |
545 if (!is_external_suspend()) { | |
546 // Suspend request is cancelled. This is always checked before | |
547 // is_ext_suspended() to reduce the risk of a rogue resume | |
548 // confusing the thread that made the suspend request. | |
549 *bits |= 0x00000200; | |
550 return false; | |
551 } | |
552 | |
553 if (is_ext_suspended()) { | |
554 // thread is suspended | |
555 *bits |= 0x00000400; | |
556 return true; | |
557 } | |
558 | |
559 // Now that we no longer do hard suspends of threads running | |
560 // native code, the target thread can be changing thread state | |
561 // while we are in this routine: | |
562 // | |
563 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked | |
564 // | |
565 // We save a copy of the thread state as observed at this moment | |
566 // and make our decision about suspend completeness based on the | |
567 // copy. This closes the race where the thread state is seen as | |
568 // _thread_in_native_trans in the if-thread_blocked check, but is | |
569 // seen as _thread_blocked in if-thread_in_native_trans check. | |
570 JavaThreadState save_state = thread_state(); | |
571 | |
572 if (save_state == _thread_blocked && is_suspend_equivalent()) { | |
573 // If the thread's state is _thread_blocked and this blocking | |
574 // condition is known to be equivalent to a suspend, then we can | |
575 // consider the thread to be externally suspended. This means that | |
576 // the code that sets _thread_blocked has been modified to do | |
577 // self-suspension if the blocking condition releases. We also | |
578 // used to check for CONDVAR_WAIT here, but that is now covered by | |
579 // the _thread_blocked with self-suspension check. | |
580 // | |
581 // Return true since we wouldn't be here unless there was still an | |
582 // external suspend request. | |
583 *bits |= 0x00001000; | |
584 return true; | |
585 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) { | |
586 // Threads running native code will self-suspend on native==>VM/Java | |
587 // transitions. If its stack is walkable (should always be the case | |
588 // unless this function is called before the actual java_suspend() | |
589 // call), then the wait is done. | |
590 *bits |= 0x00002000; | |
591 return true; | |
592 } else if (!called_by_wait && !did_trans_retry && | |
593 save_state == _thread_in_native_trans && | |
594 frame_anchor()->walkable()) { | |
595 // The thread is transitioning from thread_in_native to another | |
596 // thread state. check_safepoint_and_suspend_for_native_trans() | |
597 // will force the thread to self-suspend. If it hasn't gotten | |
598 // there yet we may have caught the thread in-between the native | |
599 // code check above and the self-suspend. Lucky us. If we were | |
600 // called by wait_for_ext_suspend_completion(), then it | |
601 // will be doing the retries so we don't have to. | |
602 // | |
603 // Since we use the saved thread state in the if-statement above, | |
604 // there is a chance that the thread has already transitioned to | |
605 // _thread_blocked by the time we get here. In that case, we will | |
606 // make a single unnecessary pass through the logic below. This | |
607 // doesn't hurt anything since we still do the trans retry. | |
608 | |
609 *bits |= 0x00004000; | |
610 | |
611 // Once the thread leaves thread_in_native_trans for another | |
612 // thread state, we break out of this retry loop. We shouldn't | |
613 // need this flag to prevent us from getting back here, but | |
614 // sometimes paranoia is good. | |
615 did_trans_retry = true; | |
616 | |
617 // We wait for the thread to transition to a more usable state. | |
618 for (int i = 1; i <= SuspendRetryCount; i++) { | |
619 // We used to do an "os::yield_all(i)" call here with the intention | |
620 // that yielding would increase on each retry. However, the parameter | |
621 // is ignored on Linux which means the yield didn't scale up. Waiting | |
622 // on the SR_lock below provides a much more predictable scale up for | |
623 // the delay. It also provides a simple/direct point to check for any | |
624 // safepoint requests from the VMThread | |
625 | |
626 // temporarily drops SR_lock while doing wait with safepoint check | |
627 // (if we're a JavaThread - the WatcherThread can also call this) | |
628 // and increase delay with each retry | |
629 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
630 | |
631 // check the actual thread state instead of what we saved above | |
632 if (thread_state() != _thread_in_native_trans) { | |
633 // the thread has transitioned to another thread state so | |
634 // try all the checks (except this one) one more time. | |
635 do_trans_retry = true; | |
636 break; | |
637 } | |
638 } // end retry loop | |
639 | |
640 | |
641 } | |
642 } while (do_trans_retry); | |
643 | |
644 *bits |= 0x00000010; | |
645 return false; | |
646 } | |
647 | |
648 // | |
649 // Wait for an external suspend request to complete (or be cancelled). | |
650 // Returns true if the thread is externally suspended and false otherwise. | |
651 // | |
652 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, | |
653 uint32_t *bits) { | |
654 TraceSuspendDebugBits tsdb(this, true /* is_wait */, | |
655 false /* !called_by_wait */, bits); | |
656 | |
657 // local flag copies to minimize SR_lock hold time | |
658 bool is_suspended; | |
659 bool pending; | |
660 uint32_t reset_bits; | |
661 | |
662 // set a marker so is_ext_suspend_completed() knows we are the caller | |
663 *bits |= 0x00010000; | |
664 | |
665 // We use reset_bits to reinitialize the bits value at the top of | |
666 // each retry loop. This allows the caller to make use of any | |
667 // unused bits for their own marking purposes. | |
668 reset_bits = *bits; | |
669 | |
670 { | |
671 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
672 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
673 delay, bits); | |
674 pending = is_external_suspend(); | |
675 } | |
676 // must release SR_lock to allow suspension to complete | |
677 | |
678 if (!pending) { | |
679 // A cancelled suspend request is the only false return from | |
680 // is_ext_suspend_completed() that keeps us from entering the | |
681 // retry loop. | |
682 *bits |= 0x00020000; | |
683 return false; | |
684 } | |
685 | |
686 if (is_suspended) { | |
687 *bits |= 0x00040000; | |
688 return true; | |
689 } | |
690 | |
691 for (int i = 1; i <= retries; i++) { | |
692 *bits = reset_bits; // reinit to only track last retry | |
693 | |
694 // We used to do an "os::yield_all(i)" call here with the intention | |
695 // that yielding would increase on each retry. However, the parameter | |
696 // is ignored on Linux which means the yield didn't scale up. Waiting | |
697 // on the SR_lock below provides a much more predictable scale up for | |
698 // the delay. It also provides a simple/direct point to check for any | |
699 // safepoint requests from the VMThread | |
700 | |
701 { | |
702 MutexLocker ml(SR_lock()); | |
703 // wait with safepoint check (if we're a JavaThread - the WatcherThread | |
704 // can also call this) and increase delay with each retry | |
705 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
706 | |
707 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
708 delay, bits); | |
709 | |
710 // It is possible for the external suspend request to be cancelled | |
711 // (by a resume) before the actual suspend operation is completed. | |
712 // Refresh our local copy to see if we still need to wait. | |
713 pending = is_external_suspend(); | |
714 } | |
715 | |
716 if (!pending) { | |
717 // A cancelled suspend request is the only false return from | |
718 // is_ext_suspend_completed() that keeps us from staying in the | |
719 // retry loop. | |
720 *bits |= 0x00080000; | |
721 return false; | |
722 } | |
723 | |
724 if (is_suspended) { | |
725 *bits |= 0x00100000; | |
726 return true; | |
727 } | |
728 } // end retry loop | |
729 | |
730 // thread did not suspend after all our retries | |
731 *bits |= 0x00200000; | |
732 return false; | |
733 } | |
734 | |
735 #ifndef PRODUCT | |
736 void JavaThread::record_jump(address target, address instr, const char* file, int line) { | |
737 | |
738 // This should not need to be atomic as the only way for simultaneous | |
739 // updates is via interrupts. Even then this should be rare or non-existant | |
740 // and we don't care that much anyway. | |
741 | |
742 int index = _jmp_ring_index; | |
743 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); | |
744 _jmp_ring[index]._target = (intptr_t) target; | |
745 _jmp_ring[index]._instruction = (intptr_t) instr; | |
746 _jmp_ring[index]._file = file; | |
747 _jmp_ring[index]._line = line; | |
748 } | |
749 #endif /* PRODUCT */ | |
750 | |
751 // Called by flat profiler | |
752 // Callers have already called wait_for_ext_suspend_completion | |
753 // The assertion for that is currently too complex to put here: | |
754 bool JavaThread::profile_last_Java_frame(frame* _fr) { | |
755 bool gotframe = false; | |
756 // self suspension saves needed state. | |
757 if (has_last_Java_frame() && _anchor.walkable()) { | |
758 *_fr = pd_last_frame(); | |
759 gotframe = true; | |
760 } | |
761 return gotframe; | |
762 } | |
763 | |
764 void Thread::interrupt(Thread* thread) { | |
765 trace("interrupt", thread); | |
766 debug_only(check_for_dangling_thread_pointer(thread);) | |
767 os::interrupt(thread); | |
768 } | |
769 | |
770 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { | |
771 trace("is_interrupted", thread); | |
772 debug_only(check_for_dangling_thread_pointer(thread);) | |
773 // Note: If clear_interrupted==false, this simply fetches and | |
774 // returns the value of the field osthread()->interrupted(). | |
775 return os::is_interrupted(thread, clear_interrupted); | |
776 } | |
777 | |
778 | |
779 // GC Support | |
780 bool Thread::claim_oops_do_par_case(int strong_roots_parity) { | |
781 jint thread_parity = _oops_do_parity; | |
782 if (thread_parity != strong_roots_parity) { | |
783 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
784 if (res == thread_parity) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
785 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
786 } else { |
0 | 787 guarantee(res == strong_roots_parity, "Or else what?"); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
788 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
789 "Should only fail when parallel."); |
0 | 790 return false; |
791 } | |
792 } | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
793 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
0 | 794 "Should only fail when parallel."); |
795 return false; | |
796 } | |
797 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
798 void Thread::oops_do(OopClosure* f, CodeBlobClosure* cf) { |
0 | 799 active_handles()->oops_do(f); |
800 // Do oop for ThreadShadow | |
801 f->do_oop((oop*)&_pending_exception); | |
802 handle_area()->oops_do(f); | |
803 } | |
804 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
805 void Thread::nmethods_do(CodeBlobClosure* cf) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
806 // no nmethods in a generic thread... |
0 | 807 } |
808 | |
809 void Thread::print_on(outputStream* st) const { | |
810 // get_priority assumes osthread initialized | |
811 if (osthread() != NULL) { | |
812 st->print("prio=%d tid=" INTPTR_FORMAT " ", get_priority(this), this); | |
813 osthread()->print_on(st); | |
814 } | |
815 debug_only(if (WizardMode) print_owned_locks_on(st);) | |
816 } | |
817 | |
818 // Thread::print_on_error() is called by fatal error handler. Don't use | |
819 // any lock or allocate memory. | |
820 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { | |
821 if (is_VM_thread()) st->print("VMThread"); | |
822 else if (is_Compiler_thread()) st->print("CompilerThread"); | |
823 else if (is_Java_thread()) st->print("JavaThread"); | |
824 else if (is_GC_task_thread()) st->print("GCTaskThread"); | |
825 else if (is_Watcher_thread()) st->print("WatcherThread"); | |
826 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); | |
827 else st->print("Thread"); | |
828 | |
829 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", | |
830 _stack_base - _stack_size, _stack_base); | |
831 | |
832 if (osthread()) { | |
833 st->print(" [id=%d]", osthread()->thread_id()); | |
834 } | |
835 } | |
836 | |
837 #ifdef ASSERT | |
838 void Thread::print_owned_locks_on(outputStream* st) const { | |
839 Monitor *cur = _owned_locks; | |
840 if (cur == NULL) { | |
841 st->print(" (no locks) "); | |
842 } else { | |
843 st->print_cr(" Locks owned:"); | |
844 while(cur) { | |
845 cur->print_on(st); | |
846 cur = cur->next(); | |
847 } | |
848 } | |
849 } | |
850 | |
851 static int ref_use_count = 0; | |
852 | |
853 bool Thread::owns_locks_but_compiled_lock() const { | |
854 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
855 if (cur != Compile_lock) return true; | |
856 } | |
857 return false; | |
858 } | |
859 | |
860 | |
861 #endif | |
862 | |
863 #ifndef PRODUCT | |
864 | |
865 // The flag: potential_vm_operation notifies if this particular safepoint state could potential | |
866 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that | |
867 // no threads which allow_vm_block's are held | |
868 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { | |
869 // Check if current thread is allowed to block at a safepoint | |
870 if (!(_allow_safepoint_count == 0)) | |
871 fatal("Possible safepoint reached by thread that does not allow it"); | |
872 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { | |
873 fatal("LEAF method calling lock?"); | |
874 } | |
875 | |
876 #ifdef ASSERT | |
877 if (potential_vm_operation && is_Java_thread() | |
878 && !Universe::is_bootstrapping()) { | |
879 // Make sure we do not hold any locks that the VM thread also uses. | |
880 // This could potentially lead to deadlocks | |
881 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
882 // Threads_lock is special, since the safepoint synchronization will not start before this is | |
883 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, | |
884 // since it is used to transfer control between JavaThreads and the VMThread | |
885 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! | |
886 if ( (cur->allow_vm_block() && | |
887 cur != Threads_lock && | |
888 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation | |
889 cur != VMOperationRequest_lock && | |
890 cur != VMOperationQueue_lock) || | |
891 cur->rank() == Mutex::special) { | |
892 warning("Thread holding lock at safepoint that vm can block on: %s", cur->name()); | |
893 } | |
894 } | |
895 } | |
896 | |
897 if (GCALotAtAllSafepoints) { | |
898 // We could enter a safepoint here and thus have a gc | |
899 InterfaceSupport::check_gc_alot(); | |
900 } | |
901 #endif | |
902 } | |
903 #endif | |
904 | |
905 bool Thread::is_in_stack(address adr) const { | |
906 assert(Thread::current() == this, "is_in_stack can only be called from current thread"); | |
907 address end = os::current_stack_pointer(); | |
908 if (stack_base() >= adr && adr >= end) return true; | |
909 | |
910 return false; | |
911 } | |
912 | |
913 | |
914 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter | |
915 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being | |
916 // used for compilation in the future. If that change is made, the need for these methods | |
917 // should be revisited, and they should be removed if possible. | |
918 | |
919 bool Thread::is_lock_owned(address adr) const { | |
1688
2dfd013a7465
6975078: assert(allocated_on_res_area() || allocated_on_C_heap() || allocated_on_arena()
kvn
parents:
1608
diff
changeset
|
920 return on_local_stack(adr); |
0 | 921 } |
922 | |
923 bool Thread::set_as_starting_thread() { | |
924 // NOTE: this must be called inside the main thread. | |
925 return os::create_main_thread((JavaThread*)this); | |
926 } | |
927 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
928 static void initialize_class(Symbol* class_name, TRAPS) { |
0 | 929 klassOop klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
930 instanceKlass::cast(klass)->initialize(CHECK); | |
931 } | |
932 | |
933 | |
934 // Creates the initial ThreadGroup | |
935 static Handle create_initial_thread_group(TRAPS) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
936 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
0 | 937 instanceKlassHandle klass (THREAD, k); |
938 | |
939 Handle system_instance = klass->allocate_instance_handle(CHECK_NH); | |
940 { | |
941 JavaValue result(T_VOID); | |
942 JavaCalls::call_special(&result, | |
943 system_instance, | |
944 klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
945 vmSymbols::object_initializer_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
946 vmSymbols::void_method_signature(), |
0 | 947 CHECK_NH); |
948 } | |
949 Universe::set_system_thread_group(system_instance()); | |
950 | |
951 Handle main_instance = klass->allocate_instance_handle(CHECK_NH); | |
952 { | |
953 JavaValue result(T_VOID); | |
954 Handle string = java_lang_String::create_from_str("main", CHECK_NH); | |
955 JavaCalls::call_special(&result, | |
956 main_instance, | |
957 klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
958 vmSymbols::object_initializer_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
959 vmSymbols::threadgroup_string_void_signature(), |
0 | 960 system_instance, |
961 string, | |
962 CHECK_NH); | |
963 } | |
964 return main_instance; | |
965 } | |
966 | |
967 // Creates the initial Thread | |
968 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
969 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
0 | 970 instanceKlassHandle klass (THREAD, k); |
971 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); | |
972 | |
973 java_lang_Thread::set_thread(thread_oop(), thread); | |
974 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
975 thread->set_threadObj(thread_oop()); | |
976 | |
977 Handle string = java_lang_String::create_from_str("main", CHECK_NULL); | |
978 | |
979 JavaValue result(T_VOID); | |
980 JavaCalls::call_special(&result, thread_oop, | |
981 klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
982 vmSymbols::object_initializer_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
983 vmSymbols::threadgroup_string_void_signature(), |
0 | 984 thread_group, |
985 string, | |
986 CHECK_NULL); | |
987 return thread_oop(); | |
988 } | |
989 | |
990 static void call_initializeSystemClass(TRAPS) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
991 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 992 instanceKlassHandle klass (THREAD, k); |
993 | |
994 JavaValue result(T_VOID); | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
995 JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
996 vmSymbols::void_method_signature(), CHECK); |
0 | 997 } |
998 | |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
999 // General purpose hook into Java code, run once when the VM is initialized. |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1000 // The Java library method itself may be changed independently from the VM. |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1001 static void call_postVMInitHook(TRAPS) { |
3938 | 1002 klassOop k = SystemDictionary::PostVMInitHook_klass(); |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1003 instanceKlassHandle klass (THREAD, k); |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1004 if (klass.not_null()) { |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1005 JavaValue result(T_VOID); |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1006 JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1007 vmSymbols::void_method_signature(), |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1008 CHECK); |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1009 } |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1010 } |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
1011 |
0 | 1012 static void reset_vm_info_property(TRAPS) { |
1013 // the vm info string | |
1014 ResourceMark rm(THREAD); | |
1015 const char *vm_info = VM_Version::vm_info_string(); | |
1016 | |
1017 // java.lang.System class | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1018 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1019 instanceKlassHandle klass (THREAD, k); |
1020 | |
1021 // setProperty arguments | |
1022 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); | |
1023 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); | |
1024 | |
1025 // return value | |
1026 JavaValue r(T_OBJECT); | |
1027 | |
1028 // public static String setProperty(String key, String value); | |
1029 JavaCalls::call_static(&r, | |
1030 klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1031 vmSymbols::setProperty_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1032 vmSymbols::string_string_string_signature(), |
0 | 1033 key_str, |
1034 value_str, | |
1035 CHECK); | |
1036 } | |
1037 | |
1038 | |
1039 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { | |
1040 assert(thread_group.not_null(), "thread group should be specified"); | |
1041 assert(threadObj() == NULL, "should only create Java thread object once"); | |
1042 | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1043 klassOop k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 1044 instanceKlassHandle klass (THREAD, k); |
1045 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
1046 | |
1047 java_lang_Thread::set_thread(thread_oop(), this); | |
1048 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1049 set_threadObj(thread_oop()); | |
1050 | |
1051 JavaValue result(T_VOID); | |
1052 if (thread_name != NULL) { | |
1053 Handle name = java_lang_String::create_from_str(thread_name, CHECK); | |
1054 // Thread gets assigned specified name and null target | |
1055 JavaCalls::call_special(&result, | |
1056 thread_oop, | |
1057 klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1058 vmSymbols::object_initializer_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1059 vmSymbols::threadgroup_string_void_signature(), |
0 | 1060 thread_group, // Argument 1 |
1061 name, // Argument 2 | |
1062 THREAD); | |
1063 } else { | |
1064 // Thread gets assigned name "Thread-nnn" and null target | |
1065 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) | |
1066 JavaCalls::call_special(&result, | |
1067 thread_oop, | |
1068 klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1069 vmSymbols::object_initializer_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1070 vmSymbols::threadgroup_runnable_void_signature(), |
0 | 1071 thread_group, // Argument 1 |
1072 Handle(), // Argument 2 | |
1073 THREAD); | |
1074 } | |
1075 | |
1076 | |
1077 if (daemon) { | |
1078 java_lang_Thread::set_daemon(thread_oop()); | |
1079 } | |
1080 | |
1081 if (HAS_PENDING_EXCEPTION) { | |
1082 return; | |
1083 } | |
1084 | |
1142 | 1085 KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
0 | 1086 Handle threadObj(this, this->threadObj()); |
1087 | |
1088 JavaCalls::call_special(&result, | |
1089 thread_group, | |
1090 group, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1091 vmSymbols::add_method_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1092 vmSymbols::thread_void_signature(), |
0 | 1093 threadObj, // Arg 1 |
1094 THREAD); | |
1095 | |
1096 | |
1097 } | |
1098 | |
1099 // NamedThread -- non-JavaThread subclasses with multiple | |
1100 // uniquely named instances should derive from this. | |
1101 NamedThread::NamedThread() : Thread() { | |
1102 _name = NULL; | |
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
1103 _processed_thread = NULL; |
0 | 1104 } |
1105 | |
1106 NamedThread::~NamedThread() { | |
1107 if (_name != NULL) { | |
1108 FREE_C_HEAP_ARRAY(char, _name); | |
1109 _name = NULL; | |
1110 } | |
1111 } | |
1112 | |
1113 void NamedThread::set_name(const char* format, ...) { | |
1114 guarantee(_name == NULL, "Only get to set name once."); | |
1115 _name = NEW_C_HEAP_ARRAY(char, max_name_len); | |
1116 guarantee(_name != NULL, "alloc failure"); | |
1117 va_list ap; | |
1118 va_start(ap, format); | |
1119 jio_vsnprintf(_name, max_name_len, format, ap); | |
1120 va_end(ap); | |
1121 } | |
1122 | |
1123 // ======= WatcherThread ======== | |
1124 | |
1125 // The watcher thread exists to simulate timer interrupts. It should | |
1126 // be replaced by an abstraction over whatever native support for | |
1127 // timer interrupts exists on the platform. | |
1128 | |
1129 WatcherThread* WatcherThread::_watcher_thread = NULL; | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1130 volatile bool WatcherThread::_should_terminate = false; |
0 | 1131 |
1132 WatcherThread::WatcherThread() : Thread() { | |
1133 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); | |
1134 if (os::create_thread(this, os::watcher_thread)) { | |
1135 _watcher_thread = this; | |
1136 | |
1137 // Set the watcher thread to the highest OS priority which should not be | |
1138 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY | |
1139 // is created. The only normal thread using this priority is the reference | |
1140 // handler thread, which runs for very short intervals only. | |
1141 // If the VMThread's priority is not lower than the WatcherThread profiling | |
1142 // will be inaccurate. | |
1143 os::set_priority(this, MaxPriority); | |
1144 if (!DisableStartThread) { | |
1145 os::start_thread(this); | |
1146 } | |
1147 } | |
1148 } | |
1149 | |
1150 void WatcherThread::run() { | |
1151 assert(this == watcher_thread(), "just checking"); | |
1152 | |
1153 this->record_stack_base_and_size(); | |
1154 this->initialize_thread_local_storage(); | |
1155 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1156 while(!_should_terminate) { | |
1157 assert(watcher_thread() == Thread::current(), "thread consistency check"); | |
1158 assert(watcher_thread() == this, "thread consistency check"); | |
1159 | |
1160 // Calculate how long it'll be until the next PeriodicTask work | |
1161 // should be done, and sleep that amount of time. | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1162 size_t time_to_wait = PeriodicTask::time_to_wait(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1163 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1164 // we expect this to timeout - we only ever get unparked when |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1165 // we should terminate |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1166 { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1167 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1168 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1169 jlong prev_time = os::javaTimeNanos(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1170 for (;;) { |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1171 int res= _SleepEvent->park(time_to_wait); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1172 if (res == OS_TIMEOUT || _should_terminate) |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1173 break; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1174 // spurious wakeup of some kind |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1175 jlong now = os::javaTimeNanos(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1176 time_to_wait -= (now - prev_time) / 1000000; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1177 if (time_to_wait <= 0) |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1178 break; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1179 prev_time = now; |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1180 } |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1181 } |
0 | 1182 |
1183 if (is_error_reported()) { | |
1184 // A fatal error has happened, the error handler(VMError::report_and_die) | |
1185 // should abort JVM after creating an error log file. However in some | |
1186 // rare cases, the error handler itself might deadlock. Here we try to | |
1187 // kill JVM if the fatal error handler fails to abort in 2 minutes. | |
1188 // | |
1189 // This code is in WatcherThread because WatcherThread wakes up | |
1190 // periodically so the fatal error handler doesn't need to do anything; | |
1191 // also because the WatcherThread is less likely to crash than other | |
1192 // threads. | |
1193 | |
1194 for (;;) { | |
1195 if (!ShowMessageBoxOnError | |
1196 && (OnError == NULL || OnError[0] == '\0') | |
1197 && Arguments::abort_hook() == NULL) { | |
1198 os::sleep(this, 2 * 60 * 1000, false); | |
1199 fdStream err(defaultStream::output_fd()); | |
1200 err.print_raw_cr("# [ timer expired, abort... ]"); | |
1201 // skip atexit/vm_exit/vm_abort hooks | |
1202 os::die(); | |
1203 } | |
1204 | |
1205 // Wake up 5 seconds later, the fatal handler may reset OnError or | |
1206 // ShowMessageBoxOnError when it is ready to abort. | |
1207 os::sleep(this, 5 * 1000, false); | |
1208 } | |
1209 } | |
1210 | |
1211 PeriodicTask::real_time_tick(time_to_wait); | |
1212 | |
1213 // If we have no more tasks left due to dynamic disenrollment, | |
1214 // shut down the thread since we don't currently support dynamic enrollment | |
1215 if (PeriodicTask::num_tasks() == 0) { | |
1216 _should_terminate = true; | |
1217 } | |
1218 } | |
1219 | |
1220 // Signal that it is terminated | |
1221 { | |
1222 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); | |
1223 _watcher_thread = NULL; | |
1224 Terminator_lock->notify(); | |
1225 } | |
1226 | |
1227 // Thread destructor usually does this.. | |
1228 ThreadLocalStorage::set_thread(NULL); | |
1229 } | |
1230 | |
1231 void WatcherThread::start() { | |
1232 if (watcher_thread() == NULL) { | |
1233 _should_terminate = false; | |
1234 // Create the single instance of WatcherThread | |
1235 new WatcherThread(); | |
1236 } | |
1237 } | |
1238 | |
1239 void WatcherThread::stop() { | |
1240 // it is ok to take late safepoints here, if needed | |
1241 MutexLocker mu(Terminator_lock); | |
1242 _should_terminate = true; | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1243 OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1244 |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1245 Thread* watcher = watcher_thread(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1246 if (watcher != NULL) |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1247 watcher->_SleepEvent->unpark(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1248 |
0 | 1249 while(watcher_thread() != NULL) { |
1250 // This wait should make safepoint checks, wait without a timeout, | |
1251 // and wait as a suspend-equivalent condition. | |
1252 // | |
1253 // Note: If the FlatProfiler is running, then this thread is waiting | |
1254 // for the WatcherThread to terminate and the WatcherThread, via the | |
1255 // FlatProfiler task, is waiting for the external suspend request on | |
1256 // this thread to complete. wait_for_ext_suspend_completion() will | |
1257 // eventually timeout, but that takes time. Making this wait a | |
1258 // suspend-equivalent condition solves that timeout problem. | |
1259 // | |
1260 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
1261 Mutex::_as_suspend_equivalent_flag); | |
1262 } | |
1263 } | |
1264 | |
1265 void WatcherThread::print_on(outputStream* st) const { | |
1266 st->print("\"%s\" ", name()); | |
1267 Thread::print_on(st); | |
1268 st->cr(); | |
1269 } | |
1270 | |
1271 // ======= JavaThread ======== | |
1272 | |
1273 // A JavaThread is a normal Java thread | |
1274 | |
1275 void JavaThread::initialize() { | |
1276 // Initialize fields | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1277 |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1278 // Set the claimed par_id to -1 (ie not claiming any par_ids) |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1279 set_claimed_par_id(-1); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1280 |
0 | 1281 set_saved_exception_pc(NULL); |
1282 set_threadObj(NULL); | |
1283 _anchor.clear(); | |
1284 set_entry_point(NULL); | |
1285 set_jni_functions(jni_functions()); | |
1286 set_callee_target(NULL); | |
1287 set_vm_result(NULL); | |
1288 set_vm_result_2(NULL); | |
1289 set_vframe_array_head(NULL); | |
1290 set_vframe_array_last(NULL); | |
1291 set_deferred_locals(NULL); | |
1292 set_deopt_mark(NULL); | |
1814
fd5d4527cdf5
6986270: guarantee(*bcp != Bytecodes::_monitorenter || exec_mode != Deoptimization::Unpack_exception) fails
iveresov
parents:
1731
diff
changeset
|
1293 set_deopt_nmethod(NULL); |
0 | 1294 clear_must_deopt_id(); |
1295 set_monitor_chunks(NULL); | |
1296 set_next(NULL); | |
1297 set_thread_state(_thread_new); | |
1298 _terminated = _not_terminated; | |
1299 _privileged_stack_top = NULL; | |
1300 _array_for_gc = NULL; | |
1301 _suspend_equivalent = false; | |
1302 _in_deopt_handler = 0; | |
1303 _doing_unsafe_access = false; | |
1304 _stack_guard_state = stack_guard_unused; | |
1305 _exception_oop = NULL; | |
1306 _exception_pc = 0; | |
1307 _exception_handler_pc = 0; | |
1903 | 1308 _is_method_handle_return = 0; |
0 | 1309 _jvmti_thread_state= NULL; |
1213
6deeaebad47a
6902182: 4/4 Starting with jdwp agent should not incur performance penalty
dcubed
parents:
1166
diff
changeset
|
1310 _should_post_on_exceptions_flag = JNI_FALSE; |
0 | 1311 _jvmti_get_loaded_classes_closure = NULL; |
1312 _interp_only_mode = 0; | |
1313 _special_runtime_exit_condition = _no_async_condition; | |
1314 _pending_async_exception = NULL; | |
1315 _is_compiling = false; | |
1316 _thread_stat = NULL; | |
1317 _thread_stat = new ThreadStatistics(); | |
1318 _blocked_on_compilation = false; | |
1319 _jni_active_critical = 0; | |
1320 _do_not_unlock_if_synchronized = false; | |
1321 _cached_monitor_info = NULL; | |
1322 _parker = Parker::Allocate(this) ; | |
1323 | |
1324 #ifndef PRODUCT | |
1325 _jmp_ring_index = 0; | |
1326 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { | |
1327 record_jump(NULL, NULL, NULL, 0); | |
1328 } | |
1329 #endif /* PRODUCT */ | |
1330 | |
1331 set_thread_profiler(NULL); | |
1332 if (FlatProfiler::is_active()) { | |
1333 // This is where we would decide to either give each thread it's own profiler | |
1334 // or use one global one from FlatProfiler, | |
1335 // or up to some count of the number of profiled threads, etc. | |
1336 ThreadProfiler* pp = new ThreadProfiler(); | |
1337 pp->engage(); | |
1338 set_thread_profiler(pp); | |
1339 } | |
1340 | |
1341 // Setup safepoint state info for this thread | |
1342 ThreadSafepointState::create(this); | |
1343 | |
1344 debug_only(_java_call_counter = 0); | |
1345 | |
1346 // JVMTI PopFrame support | |
1347 _popframe_condition = popframe_inactive; | |
1348 _popframe_preserved_args = NULL; | |
1349 _popframe_preserved_args_size = 0; | |
1350 | |
1351 pd_initialize(); | |
1352 } | |
1353 | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1354 #ifndef SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1355 SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1356 DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1357 #endif // !SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1358 |
4006 | 1359 JavaThread::JavaThread(bool is_attaching_via_jni) : |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1360 Thread() |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1361 #ifndef SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1362 , _satb_mark_queue(&_satb_mark_queue_set), |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1363 _dirty_card_queue(&_dirty_card_queue_set) |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1364 #endif // !SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1365 { |
0 | 1366 initialize(); |
4006 | 1367 if (is_attaching_via_jni) { |
1368 _jni_attach_state = _attaching_via_jni; | |
1369 } else { | |
1370 _jni_attach_state = _not_attaching_via_jni; | |
1371 } | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
997
diff
changeset
|
1372 assert(_deferred_card_mark.is_empty(), "Default MemRegion ctor"); |
0 | 1373 } |
1374 | |
1375 bool JavaThread::reguard_stack(address cur_sp) { | |
1376 if (_stack_guard_state != stack_guard_yellow_disabled) { | |
1377 return true; // Stack already guarded or guard pages not needed. | |
1378 } | |
1379 | |
1380 if (register_stack_overflow()) { | |
1381 // For those architectures which have separate register and | |
1382 // memory stacks, we must check the register stack to see if | |
1383 // it has overflowed. | |
1384 return false; | |
1385 } | |
1386 | |
1387 // Java code never executes within the yellow zone: the latter is only | |
1388 // there to provoke an exception during stack banging. If java code | |
1389 // is executing there, either StackShadowPages should be larger, or | |
1390 // some exception code in c1, c2 or the interpreter isn't unwinding | |
1391 // when it should. | |
1392 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); | |
1393 | |
1394 enable_stack_yellow_zone(); | |
1395 return true; | |
1396 } | |
1397 | |
1398 bool JavaThread::reguard_stack(void) { | |
1399 return reguard_stack(os::current_stack_pointer()); | |
1400 } | |
1401 | |
1402 | |
1403 void JavaThread::block_if_vm_exited() { | |
1404 if (_terminated == _vm_exited) { | |
1405 // _vm_exited is set at safepoint, and Threads_lock is never released | |
1406 // we will block here forever | |
1407 Threads_lock->lock_without_safepoint_check(); | |
1408 ShouldNotReachHere(); | |
1409 } | |
1410 } | |
1411 | |
1412 | |
1413 // Remove this ifdef when C1 is ported to the compiler interface. | |
1414 static void compiler_thread_entry(JavaThread* thread, TRAPS); | |
1415 | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1416 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1417 Thread() |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1418 #ifndef SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1419 , _satb_mark_queue(&_satb_mark_queue_set), |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1420 _dirty_card_queue(&_dirty_card_queue_set) |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1421 #endif // !SERIALGC |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
1422 { |
0 | 1423 if (TraceThreadEvents) { |
1424 tty->print_cr("creating thread %p", this); | |
1425 } | |
1426 initialize(); | |
4006 | 1427 _jni_attach_state = _not_attaching_via_jni; |
0 | 1428 set_entry_point(entry_point); |
1429 // Create the native thread itself. | |
1430 // %note runtime_23 | |
1431 os::ThreadType thr_type = os::java_thread; | |
1432 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : | |
1433 os::java_thread; | |
1434 os::create_thread(this, thr_type, stack_sz); | |
1435 | |
1436 // The _osthread may be NULL here because we ran out of memory (too many threads active). | |
1437 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller | |
1438 // may hold a lock and all locks must be unlocked before throwing the exception (throwing | |
1439 // the exception consists of creating the exception object & initializing it, initialization | |
1440 // will leave the VM via a JavaCall and then all locks must be unlocked). | |
1441 // | |
1442 // The thread is still suspended when we reach here. Thread must be explicit started | |
1443 // by creator! Furthermore, the thread must also explicitly be added to the Threads list | |
1444 // by calling Threads:add. The reason why this is not done here, is because the thread | |
1445 // object must be fully initialized (take a look at JVM_Start) | |
1446 } | |
1447 | |
1448 JavaThread::~JavaThread() { | |
1449 if (TraceThreadEvents) { | |
1450 tty->print_cr("terminate thread %p", this); | |
1451 } | |
1452 | |
1453 // JSR166 -- return the parker to the free list | |
1454 Parker::Release(_parker); | |
1455 _parker = NULL ; | |
1456 | |
1457 // Free any remaining previous UnrollBlock | |
1458 vframeArray* old_array = vframe_array_last(); | |
1459 | |
1460 if (old_array != NULL) { | |
1461 Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); | |
1462 old_array->set_unroll_block(NULL); | |
1463 delete old_info; | |
1464 delete old_array; | |
1465 } | |
1466 | |
1467 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); | |
1468 if (deferred != NULL) { | |
1469 // This can only happen if thread is destroyed before deoptimization occurs. | |
1470 assert(deferred->length() != 0, "empty array!"); | |
1471 do { | |
1472 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); | |
1473 deferred->remove_at(0); | |
1474 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
1475 delete dlv; | |
1476 } while (deferred->length() != 0); | |
1477 delete deferred; | |
1478 } | |
1479 | |
1480 // All Java related clean up happens in exit | |
1481 ThreadSafepointState::destroy(this); | |
1482 if (_thread_profiler != NULL) delete _thread_profiler; | |
1483 if (_thread_stat != NULL) delete _thread_stat; | |
1484 } | |
1485 | |
1486 | |
1487 // The first routine called by a new Java thread | |
1488 void JavaThread::run() { | |
1489 // initialize thread-local alloc buffer related fields | |
1490 this->initialize_tlab(); | |
1491 | |
1492 // used to test validitity of stack trace backs | |
1493 this->record_base_of_stack_pointer(); | |
1494 | |
1495 // Record real stack base and size. | |
1496 this->record_stack_base_and_size(); | |
1497 | |
1498 // Initialize thread local storage; set before calling MutexLocker | |
1499 this->initialize_thread_local_storage(); | |
1500 | |
1501 this->create_stack_guard_pages(); | |
1502 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1503 this->cache_global_variables(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
1504 |
0 | 1505 // Thread is now sufficient initialized to be handled by the safepoint code as being |
1506 // in the VM. Change thread state from _thread_new to _thread_in_vm | |
1507 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); | |
1508 | |
1509 assert(JavaThread::current() == this, "sanity check"); | |
1510 assert(!Thread::current()->owns_locks(), "sanity check"); | |
1511 | |
1512 DTRACE_THREAD_PROBE(start, this); | |
1513 | |
1514 // This operation might block. We call that after all safepoint checks for a new thread has | |
1515 // been completed. | |
1516 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1517 | |
1518 if (JvmtiExport::should_post_thread_life()) { | |
1519 JvmtiExport::post_thread_start(this); | |
1520 } | |
1521 | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1522 EVENT_BEGIN(TraceEventThreadStart, event); |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1523 EVENT_COMMIT(event, |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1524 EVENT_SET(event, javalangthread, java_lang_Thread::thread_id(this->threadObj()))); |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1525 |
0 | 1526 // We call another function to do the rest so we are sure that the stack addresses used |
1527 // from there will be lower than the stack base just computed | |
1528 thread_main_inner(); | |
1529 | |
1530 // Note, thread is no longer valid at this point! | |
1531 } | |
1532 | |
1533 | |
1534 void JavaThread::thread_main_inner() { | |
1535 assert(JavaThread::current() == this, "sanity check"); | |
1536 assert(this->threadObj() != NULL, "just checking"); | |
1537 | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
2129
diff
changeset
|
1538 // Execute thread entry point unless this thread has a pending exception |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
2129
diff
changeset
|
1539 // or has been stopped before starting. |
0 | 1540 // Note: Due to JVM_StopThread we can have pending exceptions already! |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
2129
diff
changeset
|
1541 if (!this->has_pending_exception() && |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
2129
diff
changeset
|
1542 !java_lang_Thread::is_stillborn(this->threadObj())) { |
4006 | 1543 { |
1544 ResourceMark rm(this); | |
1545 this->set_native_thread_name(this->get_thread_name()); | |
1546 } | |
0 | 1547 HandleMark hm(this); |
1548 this->entry_point()(this, this); | |
1549 } | |
1550 | |
1551 DTRACE_THREAD_PROBE(stop, this); | |
1552 | |
1553 this->exit(false); | |
1554 delete this; | |
1555 } | |
1556 | |
1557 | |
1558 static void ensure_join(JavaThread* thread) { | |
1559 // We do not need to grap the Threads_lock, since we are operating on ourself. | |
1560 Handle threadObj(thread, thread->threadObj()); | |
1561 assert(threadObj.not_null(), "java thread object must exist"); | |
1562 ObjectLocker lock(threadObj, thread); | |
1563 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1564 thread->clear_pending_exception(); | |
1565 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. | |
1566 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
2129
diff
changeset
|
1567 // Clear the native thread instance - this makes isAlive return false and allows the join() |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
parents:
2129
diff
changeset
|
1568 // to complete once we've done the notify_all below |
0 | 1569 java_lang_Thread::set_thread(threadObj(), NULL); |
1570 lock.notify_all(thread); | |
1571 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1572 thread->clear_pending_exception(); | |
1573 } | |
1574 | |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1575 |
0 | 1576 // For any new cleanup additions, please check to see if they need to be applied to |
1577 // cleanup_failed_attach_current_thread as well. | |
1578 void JavaThread::exit(bool destroy_vm, ExitType exit_type) { | |
1579 assert(this == JavaThread::current(), "thread consistency check"); | |
1580 if (!InitializeJavaLangSystem) return; | |
1581 | |
1582 HandleMark hm(this); | |
1583 Handle uncaught_exception(this, this->pending_exception()); | |
1584 this->clear_pending_exception(); | |
1585 Handle threadObj(this, this->threadObj()); | |
1586 assert(threadObj.not_null(), "Java thread object should be created"); | |
1587 | |
1588 if (get_thread_profiler() != NULL) { | |
1589 get_thread_profiler()->disengage(); | |
1590 ResourceMark rm; | |
1591 get_thread_profiler()->print(get_thread_name()); | |
1592 } | |
1593 | |
1594 | |
1595 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place | |
1596 { | |
1597 EXCEPTION_MARK; | |
1598 | |
1599 CLEAR_PENDING_EXCEPTION; | |
1600 } | |
1601 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This | |
1602 // has to be fixed by a runtime query method | |
1603 if (!destroy_vm || JDK_Version::is_jdk12x_version()) { | |
1604 // JSR-166: change call from from ThreadGroup.uncaughtException to | |
1605 // java.lang.Thread.dispatchUncaughtException | |
1606 if (uncaught_exception.not_null()) { | |
1607 Handle group(this, java_lang_Thread::threadGroup(threadObj())); | |
1608 { | |
1609 EXCEPTION_MARK; | |
1610 // Check if the method Thread.dispatchUncaughtException() exists. If so | |
1611 // call it. Otherwise we have an older library without the JSR-166 changes, | |
1612 // so call ThreadGroup.uncaughtException() | |
1613 KlassHandle recvrKlass(THREAD, threadObj->klass()); | |
1614 CallInfo callinfo; | |
1142 | 1615 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1616 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1617 vmSymbols::dispatchUncaughtException_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1618 vmSymbols::throwable_void_signature(), |
0 | 1619 KlassHandle(), false, false, THREAD); |
1620 CLEAR_PENDING_EXCEPTION; | |
1621 methodHandle method = callinfo.selected_method(); | |
1622 if (method.not_null()) { | |
1623 JavaValue result(T_VOID); | |
1624 JavaCalls::call_virtual(&result, | |
1625 threadObj, thread_klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1626 vmSymbols::dispatchUncaughtException_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1627 vmSymbols::throwable_void_signature(), |
0 | 1628 uncaught_exception, |
1629 THREAD); | |
1630 } else { | |
1142 | 1631 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 1632 JavaValue result(T_VOID); |
1633 JavaCalls::call_virtual(&result, | |
1634 group, thread_group, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1635 vmSymbols::uncaughtException_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1636 vmSymbols::thread_throwable_void_signature(), |
0 | 1637 threadObj, // Arg 1 |
1638 uncaught_exception, // Arg 2 | |
1639 THREAD); | |
1640 } | |
2200
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1641 if (HAS_PENDING_EXCEPTION) { |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1642 ResourceMark rm(this); |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1643 jio_fprintf(defaultStream::error_stream(), |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1644 "\nException: %s thrown from the UncaughtExceptionHandler" |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1645 " in thread \"%s\"\n", |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1646 Klass::cast(pending_exception()->klass())->external_name(), |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1647 get_thread_name()); |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1648 CLEAR_PENDING_EXCEPTION; |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
parents:
2177
diff
changeset
|
1649 } |
0 | 1650 } |
1651 } | |
1652 | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1653 // Called before the java thread exit since we want to read info |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1654 // from java_lang_Thread object |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1655 EVENT_BEGIN(TraceEventThreadEnd, event); |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1656 EVENT_COMMIT(event, |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1657 EVENT_SET(event, javalangthread, java_lang_Thread::thread_id(this->threadObj()))); |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1658 |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1659 // Call after last event on thread |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1660 EVENT_THREAD_EXIT(this); |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
1661 |
0 | 1662 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
1663 // the execution of the method. If that is not enough, then we don't really care. Thread.stop | |
1664 // is deprecated anyhow. | |
1665 { int count = 3; | |
1666 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { | |
1667 EXCEPTION_MARK; | |
1668 JavaValue result(T_VOID); | |
1142 | 1669 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1670 JavaCalls::call_virtual(&result, |
1671 threadObj, thread_klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1672 vmSymbols::exit_method_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
1673 vmSymbols::void_method_signature(), |
0 | 1674 THREAD); |
1675 CLEAR_PENDING_EXCEPTION; | |
1676 } | |
1677 } | |
1678 | |
1679 // notify JVMTI | |
1680 if (JvmtiExport::should_post_thread_life()) { | |
1681 JvmtiExport::post_thread_end(this); | |
1682 } | |
1683 | |
1684 // We have notified the agents that we are exiting, before we go on, | |
1685 // we must check for a pending external suspend request and honor it | |
1686 // in order to not surprise the thread that made the suspend request. | |
1687 while (true) { | |
1688 { | |
1689 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1690 if (!is_external_suspend()) { | |
1691 set_terminated(_thread_exiting); | |
1692 ThreadService::current_thread_exiting(this); | |
1693 break; | |
1694 } | |
1695 // Implied else: | |
1696 // Things get a little tricky here. We have a pending external | |
1697 // suspend request, but we are holding the SR_lock so we | |
1698 // can't just self-suspend. So we temporarily drop the lock | |
1699 // and then self-suspend. | |
1700 } | |
1701 | |
1702 ThreadBlockInVM tbivm(this); | |
1703 java_suspend_self(); | |
1704 | |
1705 // We're done with this suspend request, but we have to loop around | |
1706 // and check again. Eventually we will get SR_lock without a pending | |
1707 // external suspend request and will be able to mark ourselves as | |
1708 // exiting. | |
1709 } | |
1710 // no more external suspends are allowed at this point | |
1711 } else { | |
1712 // before_exit() has already posted JVMTI THREAD_END events | |
1713 } | |
1714 | |
1715 // Notify waiters on thread object. This has to be done after exit() is called | |
1716 // on the thread (if the thread is the last thread in a daemon ThreadGroup the | |
1717 // group should have the destroyed bit set before waiters are notified). | |
1718 ensure_join(this); | |
1719 assert(!this->has_pending_exception(), "ensure_join should have cleared"); | |
1720 | |
1721 // 6282335 JNI DetachCurrentThread spec states that all Java monitors | |
1722 // held by this thread must be released. A detach operation must only | |
1723 // get here if there are no Java frames on the stack. Therefore, any | |
1724 // owned monitors at this point MUST be JNI-acquired monitors which are | |
1725 // pre-inflated and in the monitor cache. | |
1726 // | |
1727 // ensure_join() ignores IllegalThreadStateExceptions, and so does this. | |
1728 if (exit_type == jni_detach && JNIDetachReleasesMonitors) { | |
1729 assert(!this->has_last_Java_frame(), "detaching with Java frames?"); | |
1730 ObjectSynchronizer::release_monitors_owned_by_thread(this); | |
1731 assert(!this->has_pending_exception(), "release_monitors should have cleared"); | |
1732 } | |
1733 | |
1734 // These things needs to be done while we are still a Java Thread. Make sure that thread | |
1735 // is in a consistent state, in case GC happens | |
1736 assert(_privileged_stack_top == NULL, "must be NULL when we get here"); | |
1737 | |
1738 if (active_handles() != NULL) { | |
1739 JNIHandleBlock* block = active_handles(); | |
1740 set_active_handles(NULL); | |
1741 JNIHandleBlock::release_block(block); | |
1742 } | |
1743 | |
1744 if (free_handle_block() != NULL) { | |
1745 JNIHandleBlock* block = free_handle_block(); | |
1746 set_free_handle_block(NULL); | |
1747 JNIHandleBlock::release_block(block); | |
1748 } | |
1749 | |
1750 // These have to be removed while this is still a valid thread. | |
1751 remove_stack_guard_pages(); | |
1752 | |
1753 if (UseTLAB) { | |
1754 tlab().make_parsable(true); // retire TLAB | |
1755 } | |
1756 | |
2126
db2b0f8c1cef
6814943: getcpool001 catches more than one JvmtiThreadState problem
kamg
parents:
2100
diff
changeset
|
1757 if (JvmtiEnv::environments_might_exist()) { |
49
31000d79ec71
6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents:
0
diff
changeset
|
1758 JvmtiExport::cleanup_thread(this); |
31000d79ec71
6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents:
0
diff
changeset
|
1759 } |
31000d79ec71
6453355: 4/4 new No_Safepoint_Verifier uses fail during GC
dcubed
parents:
0
diff
changeset
|
1760 |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1761 #ifndef SERIALGC |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1762 // We must flush G1-related buffers before removing a thread from |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1763 // the list of active threads. |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1764 if (UseG1GC) { |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1765 flush_barrier_queues(); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1766 } |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1767 #endif |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1768 |
0 | 1769 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
1770 Threads::remove(this); | |
1771 } | |
1772 | |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1773 #ifndef SERIALGC |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1774 // Flush G1-related queues. |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1775 void JavaThread::flush_barrier_queues() { |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1776 satb_mark_queue().flush(); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1777 dirty_card_queue().flush(); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1778 } |
1842
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1779 |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1780 void JavaThread::initialize_queues() { |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1781 assert(!SafepointSynchronize::is_at_safepoint(), |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1782 "we should not be at a safepoint"); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1783 |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1784 ObjPtrQueue& satb_queue = satb_mark_queue(); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1785 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1786 // The SATB queue should have been constructed with its active |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1787 // field set to false. |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1788 assert(!satb_queue.is_active(), "SATB queue should not be active"); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1789 assert(satb_queue.is_empty(), "SATB queue should be empty"); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1790 // If we are creating the thread during a marking cycle, we should |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1791 // set the active field of the SATB queue to true. |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1792 if (satb_queue_set.is_active()) { |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1793 satb_queue.set_active(true); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1794 } |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1795 |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1796 DirtyCardQueue& dirty_queue = dirty_card_queue(); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1797 // The dirty card queue should have been constructed with its |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1798 // active field set to true. |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1799 assert(dirty_queue.is_active(), "dirty card queue should be active"); |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1800 } |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
1801 #endif // !SERIALGC |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1802 |
0 | 1803 void JavaThread::cleanup_failed_attach_current_thread() { |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1804 if (get_thread_profiler() != NULL) { |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1805 get_thread_profiler()->disengage(); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1806 ResourceMark rm; |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1807 get_thread_profiler()->print(get_thread_name()); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1808 } |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1809 |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1810 if (active_handles() != NULL) { |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1811 JNIHandleBlock* block = active_handles(); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1812 set_active_handles(NULL); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1813 JNIHandleBlock::release_block(block); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1814 } |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1815 |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1816 if (free_handle_block() != NULL) { |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1817 JNIHandleBlock* block = free_handle_block(); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1818 set_free_handle_block(NULL); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1819 JNIHandleBlock::release_block(block); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1820 } |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1821 |
1290
c8a467bf56ad
6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents:
1213
diff
changeset
|
1822 // These have to be removed while this is still a valid thread. |
c8a467bf56ad
6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents:
1213
diff
changeset
|
1823 remove_stack_guard_pages(); |
c8a467bf56ad
6914050: jvm assertion "guard pages must be in use" in -Xcomp mode
coleenp
parents:
1213
diff
changeset
|
1824 |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1825 if (UseTLAB) { |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1826 tlab().make_parsable(true); // retire TLAB, if any |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1827 } |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1828 |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1829 #ifndef SERIALGC |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1830 if (UseG1GC) { |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1831 flush_barrier_queues(); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1832 } |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1833 #endif |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1834 |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1835 Threads::remove(this); |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1836 delete this; |
0 | 1837 } |
1838 | |
1839 | |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1840 |
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
iveresov
parents:
383
diff
changeset
|
1841 |
0 | 1842 JavaThread* JavaThread::active() { |
1843 Thread* thread = ThreadLocalStorage::thread(); | |
1844 assert(thread != NULL, "just checking"); | |
1845 if (thread->is_Java_thread()) { | |
1846 return (JavaThread*) thread; | |
1847 } else { | |
1848 assert(thread->is_VM_thread(), "this must be a vm thread"); | |
1849 VM_Operation* op = ((VMThread*) thread)->vm_operation(); | |
1850 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); | |
1851 assert(ret->is_Java_thread(), "must be a Java thread"); | |
1852 return ret; | |
1853 } | |
1854 } | |
1855 | |
1856 bool JavaThread::is_lock_owned(address adr) const { | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
1857 if (Thread::is_lock_owned(adr)) return true; |
0 | 1858 |
1859 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
1860 if (chunk->contains(adr)) return true; | |
1861 } | |
1862 | |
1863 return false; | |
1864 } | |
1865 | |
1866 | |
1867 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { | |
1868 chunk->set_next(monitor_chunks()); | |
1869 set_monitor_chunks(chunk); | |
1870 } | |
1871 | |
1872 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { | |
1873 guarantee(monitor_chunks() != NULL, "must be non empty"); | |
1874 if (monitor_chunks() == chunk) { | |
1875 set_monitor_chunks(chunk->next()); | |
1876 } else { | |
1877 MonitorChunk* prev = monitor_chunks(); | |
1878 while (prev->next() != chunk) prev = prev->next(); | |
1879 prev->set_next(chunk->next()); | |
1880 } | |
1881 } | |
1882 | |
1883 // JVM support. | |
1884 | |
1885 // Note: this function shouldn't block if it's called in | |
1886 // _thread_in_native_trans state (such as from | |
1887 // check_special_condition_for_native_trans()). | |
1888 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { | |
1889 | |
1890 if (has_last_Java_frame() && has_async_condition()) { | |
1891 // If we are at a polling page safepoint (not a poll return) | |
1892 // then we must defer async exception because live registers | |
1893 // will be clobbered by the exception path. Poll return is | |
1894 // ok because the call we a returning from already collides | |
1895 // with exception handling registers and so there is no issue. | |
1896 // (The exception handling path kills call result registers but | |
1897 // this is ok since the exception kills the result anyway). | |
1898 | |
1899 if (is_at_poll_safepoint()) { | |
1900 // if the code we are returning to has deoptimized we must defer | |
1901 // the exception otherwise live registers get clobbered on the | |
1902 // exception path before deoptimization is able to retrieve them. | |
1903 // | |
1904 RegisterMap map(this, false); | |
1905 frame caller_fr = last_frame().sender(&map); | |
1906 assert(caller_fr.is_compiled_frame(), "what?"); | |
1907 if (caller_fr.is_deoptimized_frame()) { | |
1908 if (TraceExceptions) { | |
1909 ResourceMark rm; | |
1910 tty->print_cr("deferred async exception at compiled safepoint"); | |
1911 } | |
1912 return; | |
1913 } | |
1914 } | |
1915 } | |
1916 | |
1917 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); | |
1918 if (condition == _no_async_condition) { | |
1919 // Conditions have changed since has_special_runtime_exit_condition() | |
1920 // was called: | |
1921 // - if we were here only because of an external suspend request, | |
1922 // then that was taken care of above (or cancelled) so we are done | |
1923 // - if we were here because of another async request, then it has | |
1924 // been cleared between the has_special_runtime_exit_condition() | |
1925 // and now so again we are done | |
1926 return; | |
1927 } | |
1928 | |
1929 // Check for pending async. exception | |
1930 if (_pending_async_exception != NULL) { | |
1931 // Only overwrite an already pending exception, if it is not a threadDeath. | |
1142 | 1932 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 1933 |
1934 // We cannot call Exceptions::_throw(...) here because we cannot block | |
1935 set_pending_exception(_pending_async_exception, __FILE__, __LINE__); | |
1936 | |
1937 if (TraceExceptions) { | |
1938 ResourceMark rm; | |
1939 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); | |
1940 if (has_last_Java_frame() ) { | |
1941 frame f = last_frame(); | |
1942 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); | |
1943 } | |
1944 tty->print_cr(" of type: %s", instanceKlass::cast(_pending_async_exception->klass())->external_name()); | |
1945 } | |
1946 _pending_async_exception = NULL; | |
1947 clear_has_async_exception(); | |
1948 } | |
1949 } | |
1950 | |
1951 if (check_unsafe_error && | |
1952 condition == _async_unsafe_access_error && !has_pending_exception()) { | |
1953 condition = _no_async_condition; // done | |
1954 switch (thread_state()) { | |
1955 case _thread_in_vm: | |
1956 { | |
1957 JavaThread* THREAD = this; | |
1958 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
1959 } | |
1960 case _thread_in_native: | |
1961 { | |
1962 ThreadInVMfromNative tiv(this); | |
1963 JavaThread* THREAD = this; | |
1964 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
1965 } | |
1966 case _thread_in_Java: | |
1967 { | |
1968 ThreadInVMfromJava tiv(this); | |
1969 JavaThread* THREAD = this; | |
1970 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); | |
1971 } | |
1972 default: | |
1973 ShouldNotReachHere(); | |
1974 } | |
1975 } | |
1976 | |
1977 assert(condition == _no_async_condition || has_pending_exception() || | |
1978 (!check_unsafe_error && condition == _async_unsafe_access_error), | |
1979 "must have handled the async condition, if no exception"); | |
1980 } | |
1981 | |
1982 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { | |
1983 // | |
1984 // Check for pending external suspend. Internal suspend requests do | |
1985 // not use handle_special_runtime_exit_condition(). | |
1986 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
1987 // thread is not the current thread. In older versions of jdbx, jdbx | |
1988 // threads could call into the VM with another thread's JNIEnv so we | |
1989 // can be here operating on behalf of a suspended thread (4432884). | |
1990 bool do_self_suspend = is_external_suspend_with_lock(); | |
1991 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { | |
1992 // | |
1993 // Because thread is external suspended the safepoint code will count | |
1994 // thread as at a safepoint. This can be odd because we can be here | |
1995 // as _thread_in_Java which would normally transition to _thread_blocked | |
1996 // at a safepoint. We would like to mark the thread as _thread_blocked | |
1997 // before calling java_suspend_self like all other callers of it but | |
1998 // we must then observe proper safepoint protocol. (We can't leave | |
1999 // _thread_blocked with a safepoint in progress). However we can be | |
2000 // here as _thread_in_native_trans so we can't use a normal transition | |
2001 // constructor/destructor pair because they assert on that type of | |
2002 // transition. We could do something like: | |
2003 // | |
2004 // JavaThreadState state = thread_state(); | |
2005 // set_thread_state(_thread_in_vm); | |
2006 // { | |
2007 // ThreadBlockInVM tbivm(this); | |
2008 // java_suspend_self() | |
2009 // } | |
2010 // set_thread_state(_thread_in_vm_trans); | |
2011 // if (safepoint) block; | |
2012 // set_thread_state(state); | |
2013 // | |
2014 // but that is pretty messy. Instead we just go with the way the | |
2015 // code has worked before and note that this is the only path to | |
2016 // java_suspend_self that doesn't put the thread in _thread_blocked | |
2017 // mode. | |
2018 | |
2019 frame_anchor()->make_walkable(this); | |
2020 java_suspend_self(); | |
2021 | |
2022 // We might be here for reasons in addition to the self-suspend request | |
2023 // so check for other async requests. | |
2024 } | |
2025 | |
2026 if (check_asyncs) { | |
2027 check_and_handle_async_exceptions(); | |
2028 } | |
2029 } | |
2030 | |
2031 void JavaThread::send_thread_stop(oop java_throwable) { | |
2032 assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); | |
2033 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); | |
2034 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
2035 | |
2036 // Do not throw asynchronous exceptions against the compiler thread | |
2037 // (the compiler thread should not be a Java thread -- fix in 1.4.2) | |
2038 if (is_Compiler_thread()) return; | |
2039 | |
2040 { | |
2041 // Actually throw the Throwable against the target Thread - however | |
2042 // only if there is no thread death exception installed already. | |
1142 | 2043 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2044 // If the topmost frame is a runtime stub, then we are calling into |
2045 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) | |
2046 // must deoptimize the caller before continuing, as the compiled exception handler table | |
2047 // may not be valid | |
2048 if (has_last_Java_frame()) { | |
2049 frame f = last_frame(); | |
2050 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { | |
2051 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2052 RegisterMap reg_map(this, UseBiasedLocking); | |
2053 frame compiled_frame = f.sender(®_map); | |
2054 if (compiled_frame.can_be_deoptimized()) { | |
2055 Deoptimization::deoptimize(this, compiled_frame, ®_map); | |
2056 } | |
2057 } | |
2058 } | |
2059 | |
2060 // Set async. pending exception in thread. | |
2061 set_pending_async_exception(java_throwable); | |
2062 | |
2063 if (TraceExceptions) { | |
2064 ResourceMark rm; | |
2065 tty->print_cr("Pending Async. exception installed of type: %s", instanceKlass::cast(_pending_async_exception->klass())->external_name()); | |
2066 } | |
2067 // for AbortVMOnException flag | |
2068 NOT_PRODUCT(Exceptions::debug_check_abort(instanceKlass::cast(_pending_async_exception->klass())->external_name())); | |
2069 } | |
2070 } | |
2071 | |
2072 | |
2073 // Interrupt thread so it will wake up from a potential wait() | |
2074 Thread::interrupt(this); | |
2075 } | |
2076 | |
2077 // External suspension mechanism. | |
2078 // | |
2079 // Tell the VM to suspend a thread when ever it knows that it does not hold on | |
2080 // to any VM_locks and it is at a transition | |
2081 // Self-suspension will happen on the transition out of the vm. | |
2082 // Catch "this" coming in from JNIEnv pointers when the thread has been freed | |
2083 // | |
2084 // Guarantees on return: | |
2085 // + Target thread will not execute any new bytecode (that's why we need to | |
2086 // force a safepoint) | |
2087 // + Target thread will not enter any new monitors | |
2088 // | |
2089 void JavaThread::java_suspend() { | |
2090 { MutexLocker mu(Threads_lock); | |
2091 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { | |
2092 return; | |
2093 } | |
2094 } | |
2095 | |
2096 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2097 if (!is_external_suspend()) { | |
2098 // a racing resume has cancelled us; bail out now | |
2099 return; | |
2100 } | |
2101 | |
2102 // suspend is done | |
2103 uint32_t debug_bits = 0; | |
2104 // Warning: is_ext_suspend_completed() may temporarily drop the | |
2105 // SR_lock to allow the thread to reach a stable thread state if | |
2106 // it is currently in a transient thread state. | |
2107 if (is_ext_suspend_completed(false /* !called_by_wait */, | |
2108 SuspendRetryDelay, &debug_bits) ) { | |
2109 return; | |
2110 } | |
2111 } | |
2112 | |
2113 VM_ForceSafepoint vm_suspend; | |
2114 VMThread::execute(&vm_suspend); | |
2115 } | |
2116 | |
2117 // Part II of external suspension. | |
2118 // A JavaThread self suspends when it detects a pending external suspend | |
2119 // request. This is usually on transitions. It is also done in places | |
2120 // where continuing to the next transition would surprise the caller, | |
2121 // e.g., monitor entry. | |
2122 // | |
2123 // Returns the number of times that the thread self-suspended. | |
2124 // | |
2125 // Note: DO NOT call java_suspend_self() when you just want to block current | |
2126 // thread. java_suspend_self() is the second stage of cooperative | |
2127 // suspension for external suspend requests and should only be used | |
2128 // to complete an external suspend request. | |
2129 // | |
2130 int JavaThread::java_suspend_self() { | |
2131 int ret = 0; | |
2132 | |
2133 // we are in the process of exiting so don't suspend | |
2134 if (is_exiting()) { | |
2135 clear_external_suspend(); | |
2136 return ret; | |
2137 } | |
2138 | |
2139 assert(_anchor.walkable() || | |
2140 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), | |
2141 "must have walkable stack"); | |
2142 | |
2143 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2144 | |
979 | 2145 assert(!this->is_ext_suspended(), |
0 | 2146 "a thread trying to self-suspend should not already be suspended"); |
2147 | |
2148 if (this->is_suspend_equivalent()) { | |
2149 // If we are self-suspending as a result of the lifting of a | |
2150 // suspend equivalent condition, then the suspend_equivalent | |
2151 // flag is not cleared until we set the ext_suspended flag so | |
2152 // that wait_for_ext_suspend_completion() returns consistent | |
2153 // results. | |
2154 this->clear_suspend_equivalent(); | |
2155 } | |
2156 | |
2157 // A racing resume may have cancelled us before we grabbed SR_lock | |
2158 // above. Or another external suspend request could be waiting for us | |
2159 // by the time we return from SR_lock()->wait(). The thread | |
2160 // that requested the suspension may already be trying to walk our | |
2161 // stack and if we return now, we can change the stack out from under | |
2162 // it. This would be a "bad thing (TM)" and cause the stack walker | |
2163 // to crash. We stay self-suspended until there are no more pending | |
2164 // external suspend requests. | |
2165 while (is_external_suspend()) { | |
2166 ret++; | |
2167 this->set_ext_suspended(); | |
2168 | |
2169 // _ext_suspended flag is cleared by java_resume() | |
2170 while (is_ext_suspended()) { | |
2171 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); | |
2172 } | |
2173 } | |
2174 | |
2175 return ret; | |
2176 } | |
2177 | |
2178 #ifdef ASSERT | |
2179 // verify the JavaThread has not yet been published in the Threads::list, and | |
2180 // hence doesn't need protection from concurrent access at this stage | |
2181 void JavaThread::verify_not_published() { | |
2182 if (!Threads_lock->owned_by_self()) { | |
2183 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); | |
2184 assert( !Threads::includes(this), | |
2185 "java thread shouldn't have been published yet!"); | |
2186 } | |
2187 else { | |
2188 assert( !Threads::includes(this), | |
2189 "java thread shouldn't have been published yet!"); | |
2190 } | |
2191 } | |
2192 #endif | |
2193 | |
2194 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2195 // progress or when _suspend_flags is non-zero. | |
2196 // Current thread needs to self-suspend if there is a suspend request and/or | |
2197 // block if a safepoint is in progress. | |
2198 // Async exception ISN'T checked. | |
2199 // Note only the ThreadInVMfromNative transition can call this function | |
2200 // directly and when thread state is _thread_in_native_trans | |
2201 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { | |
2202 assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); | |
2203 | |
2204 JavaThread *curJT = JavaThread::current(); | |
2205 bool do_self_suspend = thread->is_external_suspend(); | |
2206 | |
2207 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); | |
2208 | |
2209 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2210 // thread is not the current thread. In older versions of jdbx, jdbx | |
2211 // threads could call into the VM with another thread's JNIEnv so we | |
2212 // can be here operating on behalf of a suspended thread (4432884). | |
2213 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { | |
2214 JavaThreadState state = thread->thread_state(); | |
2215 | |
2216 // We mark this thread_blocked state as a suspend-equivalent so | |
2217 // that a caller to is_ext_suspend_completed() won't be confused. | |
2218 // The suspend-equivalent state is cleared by java_suspend_self(). | |
2219 thread->set_suspend_equivalent(); | |
2220 | |
2221 // If the safepoint code sees the _thread_in_native_trans state, it will | |
2222 // wait until the thread changes to other thread state. There is no | |
2223 // guarantee on how soon we can obtain the SR_lock and complete the | |
2224 // self-suspend request. It would be a bad idea to let safepoint wait for | |
2225 // too long. Temporarily change the state to _thread_blocked to | |
2226 // let the VM thread know that this thread is ready for GC. The problem | |
2227 // of changing thread state is that safepoint could happen just after | |
2228 // java_suspend_self() returns after being resumed, and VM thread will | |
2229 // see the _thread_blocked state. We must check for safepoint | |
2230 // after restoring the state and make sure we won't leave while a safepoint | |
2231 // is in progress. | |
2232 thread->set_thread_state(_thread_blocked); | |
2233 thread->java_suspend_self(); | |
2234 thread->set_thread_state(state); | |
2235 // Make sure new state is seen by VM thread | |
2236 if (os::is_MP()) { | |
2237 if (UseMembar) { | |
2238 // Force a fence between the write above and read below | |
2239 OrderAccess::fence(); | |
2240 } else { | |
2241 // Must use this rather than serialization page in particular on Windows | |
2242 InterfaceSupport::serialize_memory(thread); | |
2243 } | |
2244 } | |
2245 } | |
2246 | |
2247 if (SafepointSynchronize::do_call_back()) { | |
2248 // If we are safepointing, then block the caller which may not be | |
2249 // the same as the target thread (see above). | |
2250 SafepointSynchronize::block(curJT); | |
2251 } | |
2252 | |
2253 if (thread->is_deopt_suspend()) { | |
2254 thread->clear_deopt_suspend(); | |
2255 RegisterMap map(thread, false); | |
2256 frame f = thread->last_frame(); | |
2257 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { | |
2258 f = f.sender(&map); | |
2259 } | |
2260 if (f.id() == thread->must_deopt_id()) { | |
2261 thread->clear_must_deopt_id(); | |
1727
da877bdc9000
6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents:
1689
diff
changeset
|
2262 f.deoptimize(thread); |
0 | 2263 } else { |
2264 fatal("missed deoptimization!"); | |
2265 } | |
2266 } | |
2267 } | |
2268 | |
2269 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2270 // progress or when _suspend_flags is non-zero. | |
2271 // Current thread needs to self-suspend if there is a suspend request and/or | |
2272 // block if a safepoint is in progress. | |
2273 // Also check for pending async exception (not including unsafe access error). | |
2274 // Note only the native==>VM/Java barriers can call this function and when | |
2275 // thread state is _thread_in_native_trans. | |
2276 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { | |
2277 check_safepoint_and_suspend_for_native_trans(thread); | |
2278 | |
2279 if (thread->has_async_exception()) { | |
2280 // We are in _thread_in_native_trans state, don't handle unsafe | |
2281 // access error since that may block. | |
2282 thread->check_and_handle_async_exceptions(false); | |
2283 } | |
2284 } | |
2285 | |
4873
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2286 // This is a variant of the normal |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2287 // check_special_condition_for_native_trans with slightly different |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2288 // semantics for use by critical native wrappers. It does all the |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2289 // normal checks but also performs the transition back into |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2290 // thread_in_Java state. This is required so that critical natives |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2291 // can potentially block and perform a GC if they are the last thread |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2292 // exiting the GC_locker. |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2293 void JavaThread::check_special_condition_for_native_trans_and_transition(JavaThread *thread) { |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2294 check_special_condition_for_native_trans(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2295 |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2296 // Finish the transition |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2297 thread->set_thread_state(_thread_in_Java); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2298 |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2299 if (thread->do_critical_native_unlock()) { |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2300 ThreadInVMfromJavaNoAsyncException tiv(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2301 GC_locker::unlock_critical(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2302 thread->clear_critical_native_unlock(); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2303 } |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2304 } |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2305 |
0 | 2306 // We need to guarantee the Threads_lock here, since resumes are not |
2307 // allowed during safepoint synchronization | |
2308 // Can only resume from an external suspension | |
2309 void JavaThread::java_resume() { | |
2310 assert_locked_or_safepoint(Threads_lock); | |
2311 | |
2312 // Sanity check: thread is gone, has started exiting or the thread | |
2313 // was not externally suspended. | |
2314 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { | |
2315 return; | |
2316 } | |
2317 | |
2318 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2319 | |
2320 clear_external_suspend(); | |
2321 | |
2322 if (is_ext_suspended()) { | |
2323 clear_ext_suspended(); | |
2324 SR_lock()->notify_all(); | |
2325 } | |
2326 } | |
2327 | |
2328 void JavaThread::create_stack_guard_pages() { | |
2329 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; | |
2330 address low_addr = stack_base() - stack_size(); | |
2331 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2332 | |
2333 int allocate = os::allocate_stack_guard_pages(); | |
2334 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); | |
2335 | |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2336 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
0 | 2337 warning("Attempt to allocate stack guard pages failed."); |
2338 return; | |
2339 } | |
2340 | |
2341 if (os::guard_memory((char *) low_addr, len)) { | |
2342 _stack_guard_state = stack_guard_enabled; | |
2343 } else { | |
2344 warning("Attempt to protect stack guard pages failed."); | |
2345 if (os::uncommit_memory((char *) low_addr, len)) { | |
2346 warning("Attempt to deallocate stack guard pages failed."); | |
2347 } | |
2348 } | |
2349 } | |
2350 | |
2351 void JavaThread::remove_stack_guard_pages() { | |
2352 if (_stack_guard_state == stack_guard_unused) return; | |
2353 address low_addr = stack_base() - stack_size(); | |
2354 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2355 | |
2356 if (os::allocate_stack_guard_pages()) { | |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2357 if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
0 | 2358 _stack_guard_state = stack_guard_unused; |
2359 } else { | |
2360 warning("Attempt to deallocate stack guard pages failed."); | |
2361 } | |
2362 } else { | |
2363 if (_stack_guard_state == stack_guard_unused) return; | |
2364 if (os::unguard_memory((char *) low_addr, len)) { | |
2365 _stack_guard_state = stack_guard_unused; | |
2366 } else { | |
2367 warning("Attempt to unprotect stack guard pages failed."); | |
2368 } | |
2369 } | |
2370 } | |
2371 | |
2372 void JavaThread::enable_stack_yellow_zone() { | |
2373 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2374 assert(_stack_guard_state != stack_guard_enabled, "already enabled"); | |
2375 | |
2376 // The base notation is from the stacks point of view, growing downward. | |
2377 // We need to adjust it to work correctly with guard_memory() | |
2378 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2379 | |
2380 guarantee(base < stack_base(),"Error calculating stack yellow zone"); | |
2381 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); | |
2382 | |
2383 if (os::guard_memory((char *) base, stack_yellow_zone_size())) { | |
2384 _stack_guard_state = stack_guard_enabled; | |
2385 } else { | |
2386 warning("Attempt to guard stack yellow zone failed."); | |
2387 } | |
2388 enable_register_stack_guard(); | |
2389 } | |
2390 | |
2391 void JavaThread::disable_stack_yellow_zone() { | |
2392 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2393 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); | |
2394 | |
2395 // Simply return if called for a thread that does not use guard pages. | |
2396 if (_stack_guard_state == stack_guard_unused) return; | |
2397 | |
2398 // The base notation is from the stacks point of view, growing downward. | |
2399 // We need to adjust it to work correctly with guard_memory() | |
2400 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2401 | |
2402 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { | |
2403 _stack_guard_state = stack_guard_yellow_disabled; | |
2404 } else { | |
2405 warning("Attempt to unguard stack yellow zone failed."); | |
2406 } | |
2407 disable_register_stack_guard(); | |
2408 } | |
2409 | |
2410 void JavaThread::enable_stack_red_zone() { | |
2411 // The base notation is from the stacks point of view, growing downward. | |
2412 // We need to adjust it to work correctly with guard_memory() | |
2413 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2414 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2415 | |
2416 guarantee(base < stack_base(),"Error calculating stack red zone"); | |
2417 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); | |
2418 | |
2419 if(!os::guard_memory((char *) base, stack_red_zone_size())) { | |
2420 warning("Attempt to guard stack red zone failed."); | |
2421 } | |
2422 } | |
2423 | |
2424 void JavaThread::disable_stack_red_zone() { | |
2425 // The base notation is from the stacks point of view, growing downward. | |
2426 // We need to adjust it to work correctly with guard_memory() | |
2427 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2428 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2429 if (!os::unguard_memory((char *)base, stack_red_zone_size())) { | |
2430 warning("Attempt to unguard stack red zone failed."); | |
2431 } | |
2432 } | |
2433 | |
2434 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { | |
2435 // ignore is there is no stack | |
2436 if (!has_last_Java_frame()) return; | |
2437 // traverse the stack frames. Starts from top frame. | |
2438 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2439 frame* fr = fst.current(); | |
2440 f(fr, fst.register_map()); | |
2441 } | |
2442 } | |
2443 | |
2444 | |
2445 #ifndef PRODUCT | |
2446 // Deoptimization | |
2447 // Function for testing deoptimization | |
2448 void JavaThread::deoptimize() { | |
2449 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2450 StackFrameStream fst(this, UseBiasedLocking); | |
2451 bool deopt = false; // Dump stack only if a deopt actually happens. | |
2452 bool only_at = strlen(DeoptimizeOnlyAt) > 0; | |
2453 // Iterate over all frames in the thread and deoptimize | |
2454 for(; !fst.is_done(); fst.next()) { | |
2455 if(fst.current()->can_be_deoptimized()) { | |
2456 | |
2457 if (only_at) { | |
2458 // Deoptimize only at particular bcis. DeoptimizeOnlyAt | |
2459 // consists of comma or carriage return separated numbers so | |
2460 // search for the current bci in that string. | |
2461 address pc = fst.current()->pc(); | |
2462 nmethod* nm = (nmethod*) fst.current()->cb(); | |
2463 ScopeDesc* sd = nm->scope_desc_at( pc); | |
2464 char buffer[8]; | |
2465 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); | |
2466 size_t len = strlen(buffer); | |
2467 const char * found = strstr(DeoptimizeOnlyAt, buffer); | |
2468 while (found != NULL) { | |
2469 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && | |
2470 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { | |
2471 // Check that the bci found is bracketed by terminators. | |
2472 break; | |
2473 } | |
2474 found = strstr(found + 1, buffer); | |
2475 } | |
2476 if (!found) { | |
2477 continue; | |
2478 } | |
2479 } | |
2480 | |
2481 if (DebugDeoptimization && !deopt) { | |
2482 deopt = true; // One-time only print before deopt | |
2483 tty->print_cr("[BEFORE Deoptimization]"); | |
2484 trace_frames(); | |
2485 trace_stack(); | |
2486 } | |
2487 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
2488 } | |
2489 } | |
2490 | |
2491 if (DebugDeoptimization && deopt) { | |
2492 tty->print_cr("[AFTER Deoptimization]"); | |
2493 trace_frames(); | |
2494 } | |
2495 } | |
2496 | |
2497 | |
2498 // Make zombies | |
2499 void JavaThread::make_zombies() { | |
2500 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2501 if (fst.current()->can_be_deoptimized()) { | |
2502 // it is a Java nmethod | |
2503 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); | |
2504 nm->make_not_entrant(); | |
2505 } | |
2506 } | |
2507 } | |
2508 #endif // PRODUCT | |
2509 | |
2510 | |
2511 void JavaThread::deoptimized_wrt_marked_nmethods() { | |
2512 if (!has_last_Java_frame()) return; | |
2513 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2514 StackFrameStream fst(this, UseBiasedLocking); | |
2515 for(; !fst.is_done(); fst.next()) { | |
2516 if (fst.current()->should_be_deoptimized()) { | |
2517 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
2518 } | |
2519 } | |
2520 } | |
2521 | |
2522 | |
2523 // GC support | |
2524 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } | |
2525 | |
2526 void JavaThread::gc_epilogue() { | |
2527 frames_do(frame_gc_epilogue); | |
2528 } | |
2529 | |
2530 | |
2531 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } | |
2532 | |
2533 void JavaThread::gc_prologue() { | |
2534 frames_do(frame_gc_prologue); | |
2535 } | |
2536 | |
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2537 // If the caller is a NamedThread, then remember, in the current scope, |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2538 // the given JavaThread in its _processed_thread field. |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2539 class RememberProcessedThread: public StackObj { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2540 NamedThread* _cur_thr; |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2541 public: |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2542 RememberProcessedThread(JavaThread* jthr) { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2543 Thread* thread = Thread::current(); |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2544 if (thread->is_Named_thread()) { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2545 _cur_thr = (NamedThread *)thread; |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2546 _cur_thr->set_processed_thread(jthr); |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2547 } else { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2548 _cur_thr = NULL; |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2549 } |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2550 } |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2551 |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2552 ~RememberProcessedThread() { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2553 if (_cur_thr) { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2554 _cur_thr->set_processed_thread(NULL); |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2555 } |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2556 } |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2557 }; |
0 | 2558 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2559 void JavaThread::oops_do(OopClosure* f, CodeBlobClosure* cf) { |
1166 | 2560 // Verify that the deferred card marks have been flushed. |
2561 assert(deferred_card_mark().is_empty(), "Should be empty during GC"); | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
997
diff
changeset
|
2562 |
0 | 2563 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
2564 // since there may be more than one thread using each ThreadProfiler. | |
2565 | |
2566 // Traverse the GCHandles | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2567 Thread::oops_do(f, cf); |
0 | 2568 |
2569 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2570 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2571 | |
2572 if (has_last_Java_frame()) { | |
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2573 // Record JavaThread to GC thread |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2574 RememberProcessedThread rpt(this); |
0 | 2575 |
2576 // Traverse the privileged stack | |
2577 if (_privileged_stack_top != NULL) { | |
2578 _privileged_stack_top->oops_do(f); | |
2579 } | |
2580 | |
2581 // traverse the registered growable array | |
2582 if (_array_for_gc != NULL) { | |
2583 for (int index = 0; index < _array_for_gc->length(); index++) { | |
2584 f->do_oop(_array_for_gc->adr_at(index)); | |
2585 } | |
2586 } | |
2587 | |
2588 // Traverse the monitor chunks | |
2589 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2590 chunk->oops_do(f); | |
2591 } | |
2592 | |
2593 // Traverse the execution stack | |
2594 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2595 fst.current()->oops_do(f, cf, fst.register_map()); |
0 | 2596 } |
2597 } | |
2598 | |
2599 // callee_target is never live across a gc point so NULL it here should | |
2600 // it still contain a methdOop. | |
2601 | |
2602 set_callee_target(NULL); | |
2603 | |
2604 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); | |
2605 // If we have deferred set_locals there might be oops waiting to be | |
2606 // written | |
2607 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); | |
2608 if (list != NULL) { | |
2609 for (int i = 0; i < list->length(); i++) { | |
2610 list->at(i)->oops_do(f); | |
2611 } | |
2612 } | |
2613 | |
2614 // Traverse instance variables at the end since the GC may be moving things | |
2615 // around using this function | |
2616 f->do_oop((oop*) &_threadObj); | |
2617 f->do_oop((oop*) &_vm_result); | |
2618 f->do_oop((oop*) &_vm_result_2); | |
2619 f->do_oop((oop*) &_exception_oop); | |
2620 f->do_oop((oop*) &_pending_async_exception); | |
2621 | |
2622 if (jvmti_thread_state() != NULL) { | |
2623 jvmti_thread_state()->oops_do(f); | |
2624 } | |
2625 } | |
2626 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2627 void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2628 Thread::nmethods_do(cf); // (super method is a no-op) |
0 | 2629 |
2630 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2631 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2632 | |
2633 if (has_last_Java_frame()) { | |
2634 // Traverse the execution stack | |
2635 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2636 fst.current()->nmethods_do(cf); |
0 | 2637 } |
2638 } | |
2639 } | |
2640 | |
2641 // Printing | |
2642 const char* _get_thread_state_name(JavaThreadState _thread_state) { | |
2643 switch (_thread_state) { | |
2644 case _thread_uninitialized: return "_thread_uninitialized"; | |
2645 case _thread_new: return "_thread_new"; | |
2646 case _thread_new_trans: return "_thread_new_trans"; | |
2647 case _thread_in_native: return "_thread_in_native"; | |
2648 case _thread_in_native_trans: return "_thread_in_native_trans"; | |
2649 case _thread_in_vm: return "_thread_in_vm"; | |
2650 case _thread_in_vm_trans: return "_thread_in_vm_trans"; | |
2651 case _thread_in_Java: return "_thread_in_Java"; | |
2652 case _thread_in_Java_trans: return "_thread_in_Java_trans"; | |
2653 case _thread_blocked: return "_thread_blocked"; | |
2654 case _thread_blocked_trans: return "_thread_blocked_trans"; | |
2655 default: return "unknown thread state"; | |
2656 } | |
2657 } | |
2658 | |
2659 #ifndef PRODUCT | |
2660 void JavaThread::print_thread_state_on(outputStream *st) const { | |
2661 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); | |
2662 }; | |
2663 void JavaThread::print_thread_state() const { | |
2664 print_thread_state_on(tty); | |
2665 }; | |
2666 #endif // PRODUCT | |
2667 | |
2668 // Called by Threads::print() for VM_PrintThreads operation | |
2669 void JavaThread::print_on(outputStream *st) const { | |
2670 st->print("\"%s\" ", get_thread_name()); | |
2671 oop thread_oop = threadObj(); | |
2672 if (thread_oop != NULL && java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); | |
2673 Thread::print_on(st); | |
2674 // print guess for valid stack memory region (assume 4K pages); helps lock debugging | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
2675 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
0 | 2676 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
2677 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); | |
2678 } | |
2679 #ifndef PRODUCT | |
2680 print_thread_state_on(st); | |
2681 _safepoint_state->print_on(st); | |
2682 #endif // PRODUCT | |
2683 } | |
2684 | |
2685 // Called by fatal error handler. The difference between this and | |
2686 // JavaThread::print() is that we can't grab lock or allocate memory. | |
2687 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { | |
2688 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); | |
2689 oop thread_obj = threadObj(); | |
2690 if (thread_obj != NULL) { | |
2691 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); | |
2692 } | |
2693 st->print(" ["); | |
2694 st->print("%s", _get_thread_state_name(_thread_state)); | |
2695 if (osthread()) { | |
2696 st->print(", id=%d", osthread()->thread_id()); | |
2697 } | |
2698 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", | |
2699 _stack_base - _stack_size, _stack_base); | |
2700 st->print("]"); | |
2701 return; | |
2702 } | |
2703 | |
2704 // Verification | |
2705 | |
2706 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } | |
2707 | |
2708 void JavaThread::verify() { | |
2709 // Verify oops in the thread. | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2710 oops_do(&VerifyOopClosure::verify_oop, NULL); |
0 | 2711 |
2712 // Verify the stack frames. | |
2713 frames_do(frame_verify); | |
2714 } | |
2715 | |
2716 // CR 6300358 (sub-CR 2137150) | |
2717 // Most callers of this method assume that it can't return NULL but a | |
2718 // thread may not have a name whilst it is in the process of attaching to | |
2719 // the VM - see CR 6412693, and there are places where a JavaThread can be | |
2720 // seen prior to having it's threadObj set (eg JNI attaching threads and | |
2721 // if vm exit occurs during initialization). These cases can all be accounted | |
2722 // for such that this method never returns NULL. | |
2723 const char* JavaThread::get_thread_name() const { | |
2724 #ifdef ASSERT | |
2725 // early safepoints can hit while current thread does not yet have TLS | |
2726 if (!SafepointSynchronize::is_at_safepoint()) { | |
2727 Thread *cur = Thread::current(); | |
2728 if (!(cur->is_Java_thread() && cur == this)) { | |
2729 // Current JavaThreads are allowed to get their own name without | |
2730 // the Threads_lock. | |
2731 assert_locked_or_safepoint(Threads_lock); | |
2732 } | |
2733 } | |
2734 #endif // ASSERT | |
2735 return get_thread_name_string(); | |
2736 } | |
2737 | |
2738 // Returns a non-NULL representation of this thread's name, or a suitable | |
2739 // descriptive string if there is no set name | |
2740 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { | |
2741 const char* name_str; | |
2742 oop thread_obj = threadObj(); | |
2743 if (thread_obj != NULL) { | |
2744 typeArrayOop name = java_lang_Thread::name(thread_obj); | |
2745 if (name != NULL) { | |
2746 if (buf == NULL) { | |
2747 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2748 } | |
2749 else { | |
2750 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); | |
2751 } | |
2752 } | |
4006 | 2753 else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
0 | 2754 name_str = "<no-name - thread is attaching>"; |
2755 } | |
2756 else { | |
2757 name_str = Thread::name(); | |
2758 } | |
2759 } | |
2760 else { | |
2761 name_str = Thread::name(); | |
2762 } | |
2763 assert(name_str != NULL, "unexpected NULL thread name"); | |
2764 return name_str; | |
2765 } | |
2766 | |
2767 | |
2768 const char* JavaThread::get_threadgroup_name() const { | |
2769 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
2770 oop thread_obj = threadObj(); | |
2771 if (thread_obj != NULL) { | |
2772 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
2773 if (thread_group != NULL) { | |
2774 typeArrayOop name = java_lang_ThreadGroup::name(thread_group); | |
2775 // ThreadGroup.name can be null | |
2776 if (name != NULL) { | |
2777 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2778 return str; | |
2779 } | |
2780 } | |
2781 } | |
2782 return NULL; | |
2783 } | |
2784 | |
2785 const char* JavaThread::get_parent_name() const { | |
2786 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
2787 oop thread_obj = threadObj(); | |
2788 if (thread_obj != NULL) { | |
2789 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
2790 if (thread_group != NULL) { | |
2791 oop parent = java_lang_ThreadGroup::parent(thread_group); | |
2792 if (parent != NULL) { | |
2793 typeArrayOop name = java_lang_ThreadGroup::name(parent); | |
2794 // ThreadGroup.name can be null | |
2795 if (name != NULL) { | |
2796 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2797 return str; | |
2798 } | |
2799 } | |
2800 } | |
2801 } | |
2802 return NULL; | |
2803 } | |
2804 | |
2805 ThreadPriority JavaThread::java_priority() const { | |
2806 oop thr_oop = threadObj(); | |
2807 if (thr_oop == NULL) return NormPriority; // Bootstrapping | |
2808 ThreadPriority priority = java_lang_Thread::priority(thr_oop); | |
2809 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
2810 return priority; | |
2811 } | |
2812 | |
2813 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { | |
2814 | |
2815 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
2816 // Link Java Thread object <-> C++ Thread | |
2817 | |
2818 // Get the C++ thread object (an oop) from the JNI handle (a jthread) | |
2819 // and put it into a new Handle. The Handle "thread_oop" can then | |
2820 // be used to pass the C++ thread object to other methods. | |
2821 | |
2822 // Set the Java level thread object (jthread) field of the | |
2823 // new thread (a JavaThread *) to C++ thread object using the | |
2824 // "thread_oop" handle. | |
2825 | |
2826 // Set the thread field (a JavaThread *) of the | |
2827 // oop representing the java_lang_Thread to the new thread (a JavaThread *). | |
2828 | |
2829 Handle thread_oop(Thread::current(), | |
2830 JNIHandles::resolve_non_null(jni_thread)); | |
2831 assert(instanceKlass::cast(thread_oop->klass())->is_linked(), | |
2832 "must be initialized"); | |
2833 set_threadObj(thread_oop()); | |
2834 java_lang_Thread::set_thread(thread_oop(), this); | |
2835 | |
2836 if (prio == NoPriority) { | |
2837 prio = java_lang_Thread::priority(thread_oop()); | |
2838 assert(prio != NoPriority, "A valid priority should be present"); | |
2839 } | |
2840 | |
2841 // Push the Java priority down to the native thread; needs Threads_lock | |
2842 Thread::set_priority(this, prio); | |
2843 | |
2844 // Add the new thread to the Threads list and set it in motion. | |
2845 // We must have threads lock in order to call Threads::add. | |
2846 // It is crucial that we do not block before the thread is | |
2847 // added to the Threads list for if a GC happens, then the java_thread oop | |
2848 // will not be visited by GC. | |
2849 Threads::add(this); | |
2850 } | |
2851 | |
2852 oop JavaThread::current_park_blocker() { | |
2853 // Support for JSR-166 locks | |
2854 oop thread_oop = threadObj(); | |
242 | 2855 if (thread_oop != NULL && |
2856 JDK_Version::current().supports_thread_park_blocker()) { | |
0 | 2857 return java_lang_Thread::park_blocker(thread_oop); |
2858 } | |
2859 return NULL; | |
2860 } | |
2861 | |
2862 | |
2863 void JavaThread::print_stack_on(outputStream* st) { | |
2864 if (!has_last_Java_frame()) return; | |
2865 ResourceMark rm; | |
2866 HandleMark hm; | |
2867 | |
2868 RegisterMap reg_map(this); | |
2869 vframe* start_vf = last_java_vframe(®_map); | |
2870 int count = 0; | |
2871 for (vframe* f = start_vf; f; f = f->sender() ) { | |
2872 if (f->is_java_frame()) { | |
2873 javaVFrame* jvf = javaVFrame::cast(f); | |
2874 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); | |
2875 | |
2876 // Print out lock information | |
2877 if (JavaMonitorsInStackTrace) { | |
2878 jvf->print_lock_info_on(st, count); | |
2879 } | |
2880 } else { | |
2881 // Ignore non-Java frames | |
2882 } | |
2883 | |
2884 // Bail-out case for too deep stacks | |
2885 count++; | |
2886 if (MaxJavaStackTraceDepth == count) return; | |
2887 } | |
2888 } | |
2889 | |
2890 | |
2891 // JVMTI PopFrame support | |
2892 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { | |
2893 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); | |
2894 if (in_bytes(size_in_bytes) != 0) { | |
2895 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes)); | |
2896 _popframe_preserved_args_size = in_bytes(size_in_bytes); | |
1603
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1584
diff
changeset
|
2897 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
0 | 2898 } |
2899 } | |
2900 | |
2901 void* JavaThread::popframe_preserved_args() { | |
2902 return _popframe_preserved_args; | |
2903 } | |
2904 | |
2905 ByteSize JavaThread::popframe_preserved_args_size() { | |
2906 return in_ByteSize(_popframe_preserved_args_size); | |
2907 } | |
2908 | |
2909 WordSize JavaThread::popframe_preserved_args_size_in_words() { | |
2910 int sz = in_bytes(popframe_preserved_args_size()); | |
2911 assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); | |
2912 return in_WordSize(sz / wordSize); | |
2913 } | |
2914 | |
2915 void JavaThread::popframe_free_preserved_args() { | |
2916 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); | |
2917 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args); | |
2918 _popframe_preserved_args = NULL; | |
2919 _popframe_preserved_args_size = 0; | |
2920 } | |
2921 | |
2922 #ifndef PRODUCT | |
2923 | |
2924 void JavaThread::trace_frames() { | |
2925 tty->print_cr("[Describe stack]"); | |
2926 int frame_no = 1; | |
2927 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2928 tty->print(" %d. ", frame_no++); | |
2929 fst.current()->print_value_on(tty,this); | |
2930 tty->cr(); | |
2931 } | |
2932 } | |
2933 | |
3908
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2934 class PrintAndVerifyOopClosure: public OopClosure { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2935 protected: |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2936 template <class T> inline void do_oop_work(T* p) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2937 oop obj = oopDesc::load_decode_heap_oop(p); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2938 if (obj == NULL) return; |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2939 tty->print(INTPTR_FORMAT ": ", p); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2940 if (obj->is_oop_or_null()) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2941 if (obj->is_objArray()) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2942 tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2943 } else { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2944 obj->print(); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2945 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2946 } else { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2947 tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2948 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2949 tty->cr(); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2950 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2951 public: |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2952 virtual void do_oop(oop* p) { do_oop_work(p); } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2953 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2954 }; |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2955 |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2956 |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2957 static void oops_print(frame* f, const RegisterMap *map) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2958 PrintAndVerifyOopClosure print; |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2959 f->print_value(); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2960 f->oops_do(&print, NULL, (RegisterMap*)map); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2961 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2962 |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2963 // Print our all the locations that contain oops and whether they are |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2964 // valid or not. This useful when trying to find the oldest frame |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2965 // where an oop has gone bad since the frame walk is from youngest to |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2966 // oldest. |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2967 void JavaThread::trace_oops() { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2968 tty->print_cr("[Trace oops]"); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2969 frames_do(oops_print); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2970 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
2971 |
0 | 2972 |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
2973 #ifdef ASSERT |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2974 // Print or validate the layout of stack frames |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2975 void JavaThread::print_frame_layout(int depth, bool validate_only) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2976 ResourceMark rm; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2977 PRESERVE_EXCEPTION_MARK; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2978 FrameValues values; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2979 int frame_no = 0; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2980 for(StackFrameStream fst(this, false); !fst.is_done(); fst.next()) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2981 fst.current()->describe(values, ++frame_no); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2982 if (depth == frame_no) break; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2983 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2984 if (validate_only) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2985 values.validate(); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2986 } else { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2987 tty->print_cr("[Describe stack layout]"); |
4042
b20d64f83668
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
4007
diff
changeset
|
2988 values.print(this); |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2989 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2990 } |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
2991 #endif |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
2992 |
0 | 2993 void JavaThread::trace_stack_from(vframe* start_vf) { |
2994 ResourceMark rm; | |
2995 int vframe_no = 1; | |
2996 for (vframe* f = start_vf; f; f = f->sender() ) { | |
2997 if (f->is_java_frame()) { | |
2998 javaVFrame::cast(f)->print_activation(vframe_no++); | |
2999 } else { | |
3000 f->print(); | |
3001 } | |
3002 if (vframe_no > StackPrintLimit) { | |
3003 tty->print_cr("...<more frames>..."); | |
3004 return; | |
3005 } | |
3006 } | |
3007 } | |
3008 | |
3009 | |
3010 void JavaThread::trace_stack() { | |
3011 if (!has_last_Java_frame()) return; | |
3012 ResourceMark rm; | |
3013 HandleMark hm; | |
3014 RegisterMap reg_map(this); | |
3015 trace_stack_from(last_java_vframe(®_map)); | |
3016 } | |
3017 | |
3018 | |
3019 #endif // PRODUCT | |
3020 | |
3021 | |
3022 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { | |
3023 assert(reg_map != NULL, "a map must be given"); | |
3024 frame f = last_frame(); | |
3025 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { | |
3026 if (vf->is_java_frame()) return javaVFrame::cast(vf); | |
3027 } | |
3028 return NULL; | |
3029 } | |
3030 | |
3031 | |
3032 klassOop JavaThread::security_get_caller_class(int depth) { | |
3033 vframeStream vfst(this); | |
3034 vfst.security_get_caller_frame(depth); | |
3035 if (!vfst.at_end()) { | |
3036 return vfst.method()->method_holder(); | |
3037 } | |
3038 return NULL; | |
3039 } | |
3040 | |
3041 static void compiler_thread_entry(JavaThread* thread, TRAPS) { | |
3042 assert(thread->is_Compiler_thread(), "must be compiler thread"); | |
3043 CompileBroker::compiler_thread_loop(); | |
3044 } | |
3045 | |
3046 // Create a CompilerThread | |
3047 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) | |
3048 : JavaThread(&compiler_thread_entry) { | |
3049 _env = NULL; | |
3050 _log = NULL; | |
3051 _task = NULL; | |
3052 _queue = queue; | |
3053 _counters = counters; | |
1584 | 3054 _buffer_blob = NULL; |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3055 _scanned_nmethod = NULL; |
0 | 3056 |
3057 #ifndef PRODUCT | |
3058 _ideal_graph_printer = NULL; | |
3059 #endif | |
3060 } | |
3061 | |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3062 void CompilerThread::oops_do(OopClosure* f, CodeBlobClosure* cf) { |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3063 JavaThread::oops_do(f, cf); |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3064 if (_scanned_nmethod != NULL && cf != NULL) { |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3065 // Safepoints can occur when the sweeper is scanning an nmethod so |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3066 // process it here to make sure it isn't unloaded in the middle of |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3067 // a scan. |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3068 cf->do_code_blob(_scanned_nmethod); |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3069 } |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3070 } |
0 | 3071 |
3072 // ======= Threads ======== | |
3073 | |
3074 // The Threads class links together all active threads, and provides | |
3075 // operations over all threads. It is protected by its own Mutex | |
3076 // lock, which is also used in other contexts to protect thread | |
3077 // operations from having the thread being operated on from exiting | |
3078 // and going away unexpectedly (e.g., safepoint synchronization) | |
3079 | |
3080 JavaThread* Threads::_thread_list = NULL; | |
3081 int Threads::_number_of_threads = 0; | |
3082 int Threads::_number_of_non_daemon_threads = 0; | |
3083 int Threads::_return_code = 0; | |
3084 size_t JavaThread::_stack_size_at_create = 0; | |
3085 | |
3086 // All JavaThreads | |
3087 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) | |
3088 | |
3089 void os_stream(); | |
3090 | |
3091 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system) | |
3092 void Threads::threads_do(ThreadClosure* tc) { | |
3093 assert_locked_or_safepoint(Threads_lock); | |
3094 // ALL_JAVA_THREADS iterates through all JavaThreads | |
3095 ALL_JAVA_THREADS(p) { | |
3096 tc->do_thread(p); | |
3097 } | |
3098 // Someday we could have a table or list of all non-JavaThreads. | |
3099 // For now, just manually iterate through them. | |
3100 tc->do_thread(VMThread::vm_thread()); | |
3101 Universe::heap()->gc_threads_do(tc); | |
323
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3102 WatcherThread *wt = WatcherThread::watcher_thread(); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3103 // Strictly speaking, the following NULL check isn't sufficient to make sure |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3104 // the data for WatcherThread is still valid upon being examined. However, |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3105 // considering that WatchThread terminates when the VM is on the way to |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3106 // exit at safepoint, the chance of the above is extremely small. The right |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3107 // way to prevent termination of WatcherThread would be to acquire |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3108 // Terminator_lock, but we can't do that without violating the lock rank |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3109 // checking in some cases. |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3110 if (wt != NULL) |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3111 tc->do_thread(wt); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3112 |
0 | 3113 // If CompilerThreads ever become non-JavaThreads, add them here |
3114 } | |
3115 | |
3116 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { | |
3117 | |
242 | 3118 extern void JDK_Version_init(); |
3119 | |
0 | 3120 // Check version |
3121 if (!is_supported_jni_version(args->version)) return JNI_EVERSION; | |
3122 | |
3123 // Initialize the output stream module | |
3124 ostream_init(); | |
3125 | |
3126 // Process java launcher properties. | |
3127 Arguments::process_sun_java_launcher_properties(args); | |
3128 | |
3129 // Initialize the os module before using TLS | |
3130 os::init(); | |
3131 | |
3132 // Initialize system properties. | |
3133 Arguments::init_system_properties(); | |
3134 | |
242 | 3135 // So that JDK version can be used as a discrimintor when parsing arguments |
3136 JDK_Version_init(); | |
3137 | |
1864
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3138 // Update/Initialize System properties after JDK version number is known |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3139 Arguments::init_version_specific_system_properties(); |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3140 |
0 | 3141 // Parse arguments |
3142 jint parse_result = Arguments::parse(args); | |
3143 if (parse_result != JNI_OK) return parse_result; | |
3144 | |
3145 if (PauseAtStartup) { | |
3146 os::pause(); | |
3147 } | |
3148 | |
4006 | 3149 #ifndef USDT2 |
0 | 3150 HS_DTRACE_PROBE(hotspot, vm__init__begin); |
4006 | 3151 #else /* USDT2 */ |
3152 HOTSPOT_VM_INIT_BEGIN(); | |
3153 #endif /* USDT2 */ | |
0 | 3154 |
3155 // Record VM creation timing statistics | |
3156 TraceVmCreationTime create_vm_timer; | |
3157 create_vm_timer.start(); | |
3158 | |
3159 // Timing (must come after argument parsing) | |
3160 TraceTime timer("Create VM", TraceStartupTime); | |
3161 | |
3162 // Initialize the os module after parsing the args | |
3163 jint os_init_2_result = os::init_2(); | |
3164 if (os_init_2_result != JNI_OK) return os_init_2_result; | |
3165 | |
3166 // Initialize output stream logging | |
3167 ostream_init_log(); | |
3168 | |
3169 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad | |
3170 // Must be before create_vm_init_agents() | |
3171 if (Arguments::init_libraries_at_startup()) { | |
3172 convert_vm_init_libraries_to_agents(); | |
3173 } | |
3174 | |
3175 // Launch -agentlib/-agentpath and converted -Xrun agents | |
3176 if (Arguments::init_agents_at_startup()) { | |
3177 create_vm_init_agents(); | |
3178 } | |
3179 | |
3180 // Initialize Threads state | |
3181 _thread_list = NULL; | |
3182 _number_of_threads = 0; | |
3183 _number_of_non_daemon_threads = 0; | |
3184 | |
3185 // Initialize TLS | |
3186 ThreadLocalStorage::init(); | |
3187 | |
3188 // Initialize global data structures and create system classes in heap | |
3189 vm_init_globals(); | |
3190 | |
3191 // Attach the main thread to this os thread | |
3192 JavaThread* main_thread = new JavaThread(); | |
3193 main_thread->set_thread_state(_thread_in_vm); | |
3194 // must do this before set_active_handles and initialize_thread_local_storage | |
3195 // Note: on solaris initialize_thread_local_storage() will (indirectly) | |
3196 // change the stack size recorded here to one based on the java thread | |
3197 // stacksize. This adjusted size is what is used to figure the placement | |
3198 // of the guard pages. | |
3199 main_thread->record_stack_base_and_size(); | |
3200 main_thread->initialize_thread_local_storage(); | |
3201 | |
3202 main_thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
3203 | |
3204 if (!main_thread->set_as_starting_thread()) { | |
3205 vm_shutdown_during_initialization( | |
3206 "Failed necessary internal allocation. Out of swap space"); | |
3207 delete main_thread; | |
3208 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3209 return JNI_ENOMEM; | |
3210 } | |
3211 | |
3212 // Enable guard page *after* os::create_main_thread(), otherwise it would | |
3213 // crash Linux VM, see notes in os_linux.cpp. | |
3214 main_thread->create_stack_guard_pages(); | |
3215 | |
1878 | 3216 // Initialize Java-Level synchronization subsystem |
3217 ObjectMonitor::Initialize() ; | |
0 | 3218 |
3219 // Initialize global modules | |
3220 jint status = init_globals(); | |
3221 if (status != JNI_OK) { | |
3222 delete main_thread; | |
3223 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3224 return status; | |
3225 } | |
3226 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3227 // Should be done after the heap is fully created |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3228 main_thread->cache_global_variables(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3229 |
0 | 3230 HandleMark hm; |
3231 | |
3232 { MutexLocker mu(Threads_lock); | |
3233 Threads::add(main_thread); | |
3234 } | |
3235 | |
3236 // Any JVMTI raw monitors entered in onload will transition into | |
3237 // real raw monitor. VM is setup enough here for raw monitor enter. | |
3238 JvmtiExport::transition_pending_onload_raw_monitors(); | |
3239 | |
3240 if (VerifyBeforeGC && | |
3241 Universe::heap()->total_collections() >= VerifyGCStartAt) { | |
3242 Universe::heap()->prepare_for_verify(); | |
3243 Universe::verify(); // make sure we're starting with a clean slate | |
3244 } | |
3245 | |
3246 // Create the VMThread | |
3247 { TraceTime timer("Start VMThread", TraceStartupTime); | |
3248 VMThread::create(); | |
3249 Thread* vmthread = VMThread::vm_thread(); | |
3250 | |
3251 if (!os::create_thread(vmthread, os::vm_thread)) | |
3252 vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); | |
3253 | |
3254 // Wait for the VM thread to become ready, and VMThread::run to initialize | |
3255 // Monitors can have spurious returns, must always check another state flag | |
3256 { | |
3257 MutexLocker ml(Notify_lock); | |
3258 os::start_thread(vmthread); | |
3259 while (vmthread->active_handles() == NULL) { | |
3260 Notify_lock->wait(); | |
3261 } | |
3262 } | |
3263 } | |
3264 | |
3265 assert (Universe::is_fully_initialized(), "not initialized"); | |
3266 EXCEPTION_MARK; | |
3267 | |
3268 // At this point, the Universe is initialized, but we have not executed | |
3269 // any byte code. Now is a good time (the only time) to dump out the | |
3270 // internal state of the JVM for sharing. | |
3271 | |
3272 if (DumpSharedSpaces) { | |
3273 Universe::heap()->preload_and_dump(CHECK_0); | |
3274 ShouldNotReachHere(); | |
3275 } | |
3276 | |
3277 // Always call even when there are not JVMTI environments yet, since environments | |
3278 // may be attached late and JVMTI must track phases of VM execution | |
3279 JvmtiExport::enter_start_phase(); | |
3280 | |
3281 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. | |
3282 JvmtiExport::post_vm_start(); | |
3283 | |
3284 { | |
3285 TraceTime timer("Initialize java.lang classes", TraceStartupTime); | |
3286 | |
3287 if (EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3288 create_vm_init_libraries(); | |
3289 } | |
3290 | |
3291 if (InitializeJavaLangString) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3292 initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
0 | 3293 } else { |
3294 warning("java.lang.String not initialized"); | |
3295 } | |
3296 | |
18
c7d713375c94
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
0
diff
changeset
|
3297 if (AggressiveOpts) { |
192
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3298 { |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3299 // Forcibly initialize java/util/HashMap and mutate the private |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3300 // static final "frontCacheEnabled" field before we start creating instances |
18
c7d713375c94
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
0
diff
changeset
|
3301 #ifdef ASSERT |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3302 klassOop tmp_k = SystemDictionary::find(vmSymbols::java_util_HashMap(), Handle(), Handle(), CHECK_0); |
192
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3303 assert(tmp_k == NULL, "java/util/HashMap should not be loaded yet"); |
18
c7d713375c94
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
0
diff
changeset
|
3304 #endif |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3305 klassOop k_o = SystemDictionary::resolve_or_null(vmSymbols::java_util_HashMap(), Handle(), Handle(), CHECK_0); |
192
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3306 KlassHandle k = KlassHandle(THREAD, k_o); |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3307 guarantee(k.not_null(), "Must find java/util/HashMap"); |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3308 instanceKlassHandle ik = instanceKlassHandle(THREAD, k()); |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3309 ik->initialize(CHECK_0); |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3310 fieldDescriptor fd; |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3311 // Possible we might not find this field; if so, don't break |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3312 if (ik->find_local_field(vmSymbols::frontCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) { |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2302
diff
changeset
|
3313 k()->java_mirror()->bool_field_put(fd.offset(), true); |
192
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3314 } |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3315 } |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3316 |
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3317 if (UseStringCache) { |
669
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3318 // Forcibly initialize java/lang/StringValue and mutate the private |
192
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3319 // static final "stringCacheEnabled" field before we start creating instances |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3320 klassOop k_o = SystemDictionary::resolve_or_null(vmSymbols::java_lang_StringValue(), Handle(), Handle(), CHECK_0); |
669
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3321 // Possible that StringValue isn't present: if so, silently don't break |
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3322 if (k_o != NULL) { |
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3323 KlassHandle k = KlassHandle(THREAD, k_o); |
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3324 instanceKlassHandle ik = instanceKlassHandle(THREAD, k()); |
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3325 ik->initialize(CHECK_0); |
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3326 fieldDescriptor fd; |
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3327 // Possible we might not find this field: if so, silently don't break |
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3328 if (ik->find_local_field(vmSymbols::stringCacheEnabled_name(), vmSymbols::bool_signature(), &fd)) { |
2376
c7f3d0b4570f
7017732: move static fields into Class to prepare for perm gen removal
never
parents:
2302
diff
changeset
|
3329 k()->java_mirror()->bool_field_put(fd.offset(), true); |
669
eca19a8425b5
6810653: Change String cache class used by Hotspot from String to StringValue
phh
parents:
441
diff
changeset
|
3330 } |
192
6d13fcb3663f
6714404: Add UseStringCache switch to enable String caching under AggressiveOpts
kvn
parents:
62
diff
changeset
|
3331 } |
18
c7d713375c94
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
0
diff
changeset
|
3332 } |
c7d713375c94
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
0
diff
changeset
|
3333 } |
c7d713375c94
6621621: HashMap front cache should be enabled only with AggressiveOpts
phh
parents:
0
diff
changeset
|
3334 |
0 | 3335 // Initialize java_lang.System (needed before creating the thread) |
3336 if (InitializeJavaLangSystem) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3337 initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3338 initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); |
0 | 3339 Handle thread_group = create_initial_thread_group(CHECK_0); |
3340 Universe::set_main_thread_group(thread_group()); | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3341 initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); |
0 | 3342 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); |
3343 main_thread->set_threadObj(thread_object); | |
3344 // Set thread status to running since main thread has | |
3345 // been started and running. | |
3346 java_lang_Thread::set_thread_status(thread_object, | |
3347 java_lang_Thread::RUNNABLE); | |
3348 | |
3349 // The VM preresolve methods to these classes. Make sure that get initialized | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3350 initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3351 initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); |
0 | 3352 // The VM creates & returns objects of this class. Make sure it's initialized. |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3353 initialize_class(vmSymbols::java_lang_Class(), CHECK_0); |
0 | 3354 call_initializeSystemClass(CHECK_0); |
3355 } else { | |
3356 warning("java.lang.System not initialized"); | |
3357 } | |
3358 | |
3359 // an instance of OutOfMemory exception has been allocated earlier | |
3360 if (InitializeJavaLangExceptionsErrors) { | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3361 initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3362 initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3363 initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3364 initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3365 initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3366 initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3367 initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); |
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3368 initialize_class(vmSymbols::java_lang_IllegalArgumentException(), CHECK_0); |
0 | 3369 } else { |
3370 warning("java.lang.OutOfMemoryError has not been initialized"); | |
3371 warning("java.lang.NullPointerException has not been initialized"); | |
3372 warning("java.lang.ClassCastException has not been initialized"); | |
3373 warning("java.lang.ArrayStoreException has not been initialized"); | |
3374 warning("java.lang.ArithmeticException has not been initialized"); | |
3375 warning("java.lang.StackOverflowError has not been initialized"); | |
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3376 warning("java.lang.IllegalArgumentException has not been initialized"); |
0 | 3377 } |
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2376
diff
changeset
|
3378 } |
0 | 3379 |
3380 // See : bugid 4211085. | |
3381 // Background : the static initializer of java.lang.Compiler tries to read | |
3382 // property"java.compiler" and read & write property "java.vm.info". | |
3383 // When a security manager is installed through the command line | |
3384 // option "-Djava.security.manager", the above properties are not | |
3385 // readable and the static initializer for java.lang.Compiler fails | |
3386 // resulting in a NoClassDefFoundError. This can happen in any | |
3387 // user code which calls methods in java.lang.Compiler. | |
3388 // Hack : the hack is to pre-load and initialize this class, so that only | |
3389 // system domains are on the stack when the properties are read. | |
3390 // Currently even the AWT code has calls to methods in java.lang.Compiler. | |
3391 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT. | |
3392 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and | |
3393 // read and write"java.vm.info" in the default policy file. See bugid 4211383 | |
3394 // Once that is done, we should remove this hack. | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3395 initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
0 | 3396 |
3397 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to | |
3398 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot | |
3399 // compiler does not get loaded through java.lang.Compiler). "java -version" with the | |
3400 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here. | |
3401 // This should also be taken out as soon as 4211383 gets fixed. | |
3402 reset_vm_info_property(CHECK_0); | |
3403 | |
3404 quicken_jni_functions(); | |
3405 | |
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3406 // Must be run after init_ft which initializes ft_enabled |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3407 if (TRACE_INITIALIZE() != JNI_OK) { |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3408 vm_exit_during_initialization("Failed to initialize tracing backend"); |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3409 } |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3410 |
0 | 3411 // Set flag that basic initialization has completed. Used by exceptions and various |
3412 // debug stuff, that does not work until all basic classes have been initialized. | |
3413 set_init_completed(); | |
3414 | |
4006 | 3415 #ifndef USDT2 |
0 | 3416 HS_DTRACE_PROBE(hotspot, vm__init__end); |
4006 | 3417 #else /* USDT2 */ |
3418 HOTSPOT_VM_INIT_END(); | |
3419 #endif /* USDT2 */ | |
0 | 3420 |
3421 // record VM initialization completion time | |
3422 Management::record_vm_init_completed(); | |
3423 | |
3424 // Compute system loader. Note that this has to occur after set_init_completed, since | |
3425 // valid exceptions may be thrown in the process. | |
3426 // Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and | |
3427 // set_init_completed has just been called, causing exceptions not to be shortcut | |
3428 // anymore. We call vm_exit_during_initialization directly instead. | |
3429 SystemDictionary::compute_java_system_loader(THREAD); | |
3430 if (HAS_PENDING_EXCEPTION) { | |
3431 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3432 } | |
3433 | |
3434 #ifndef SERIALGC | |
3435 // Support for ConcurrentMarkSweep. This should be cleaned up | |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3436 // and better encapsulated. The ugly nested if test would go away |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3437 // once things are properly refactored. XXX YSR |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3438 if (UseConcMarkSweepGC || UseG1GC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3439 if (UseConcMarkSweepGC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3440 ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3441 } else { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3442 ConcurrentMarkThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3443 } |
0 | 3444 if (HAS_PENDING_EXCEPTION) { |
3445 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3446 } | |
3447 } | |
3448 #endif // SERIALGC | |
3449 | |
3450 // Always call even when there are not JVMTI environments yet, since environments | |
3451 // may be attached late and JVMTI must track phases of VM execution | |
3452 JvmtiExport::enter_live_phase(); | |
3453 | |
3454 // Signal Dispatcher needs to be started before VMInit event is posted | |
3455 os::signal_init(); | |
3456 | |
3457 // Start Attach Listener if +StartAttachListener or it can't be started lazily | |
3458 if (!DisableAttachMechanism) { | |
3459 if (StartAttachListener || AttachListener::init_at_startup()) { | |
3460 AttachListener::init(); | |
3461 } | |
3462 } | |
3463 | |
3464 // Launch -Xrun agents | |
3465 // Must be done in the JVMTI live phase so that for backward compatibility the JDWP | |
3466 // back-end can launch with -Xdebug -Xrunjdwp. | |
3467 if (!EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3468 create_vm_init_libraries(); | |
3469 } | |
3470 | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3471 if (!TRACE_START()) { |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3472 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3473 } |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3474 |
0 | 3475 // Notify JVMTI agents that VM initialization is complete - nop if no agents. |
3476 JvmtiExport::post_vm_initialized(); | |
3477 | |
3799
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3478 if (CleanChunkPoolAsync) { |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3479 Chunk::start_chunk_pool_cleaner_task(); |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3480 } |
0 | 3481 |
3482 // initialize compiler(s) | |
3483 CompileBroker::compilation_init(); | |
3484 | |
3485 Management::initialize(THREAD); | |
3486 if (HAS_PENDING_EXCEPTION) { | |
3487 // management agent fails to start possibly due to | |
3488 // configuration problem and is responsible for printing | |
3489 // stack trace if appropriate. Simply exit VM. | |
3490 vm_exit(1); | |
3491 } | |
3492 | |
3493 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); | |
3494 if (Arguments::has_alloc_profile()) AllocationProfiler::engage(); | |
3495 if (MemProfiling) MemProfiler::engage(); | |
3496 StatSampler::engage(); | |
3497 if (CheckJNICalls) JniPeriodicChecker::engage(); | |
3498 | |
3499 BiasedLocking::init(); | |
3500 | |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3501 if (JDK_Version::current().post_vm_init_hook_enabled()) { |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3502 call_postVMInitHook(THREAD); |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3503 // The Java side of PostVMInitHook.run must deal with all |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3504 // exceptions and provide means of diagnosis. |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3505 if (HAS_PENDING_EXCEPTION) { |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3506 CLEAR_PENDING_EXCEPTION; |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3507 } |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3508 } |
0 | 3509 |
3510 // Start up the WatcherThread if there are any periodic tasks | |
3511 // NOTE: All PeriodicTasks should be registered by now. If they | |
3512 // aren't, late joiners might appear to start slowly (we might | |
3513 // take a while to process their first tick). | |
3514 if (PeriodicTask::num_tasks() > 0) { | |
3515 WatcherThread::start(); | |
3516 } | |
3517 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3518 // Give os specific code one last chance to start |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3519 os::init_3(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3520 |
0 | 3521 create_vm_timer.end(); |
3522 return JNI_OK; | |
3523 } | |
3524 | |
3525 // type for the Agent_OnLoad and JVM_OnLoad entry points | |
3526 extern "C" { | |
3527 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); | |
3528 } | |
3529 // Find a command line agent library and return its entry point for | |
3530 // -agentlib: -agentpath: -Xrun | |
3531 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. | |
3532 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { | |
3533 OnLoadEntry_t on_load_entry = NULL; | |
3534 void *library = agent->os_lib(); // check if we have looked it up before | |
3535 | |
3536 if (library == NULL) { | |
3537 char buffer[JVM_MAXPATHLEN]; | |
3538 char ebuf[1024]; | |
3539 const char *name = agent->name(); | |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3540 const char *msg = "Could not find agent library "; |
0 | 3541 |
3542 if (agent->is_absolute_path()) { | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3543 library = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3544 if (library == NULL) { |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3545 const char *sub_msg = " in absolute path, with error: "; |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3546 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3547 char *buf = NEW_C_HEAP_ARRAY(char, len); |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3548 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3549 // If we can't find the agent, exit. |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3550 vm_exit_during_initialization(buf, NULL); |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3551 FREE_C_HEAP_ARRAY(char, buf); |
0 | 3552 } |
3553 } else { | |
3554 // Try to load the agent from the standard dll directory | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3555 os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), name); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3556 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
0 | 3557 #ifdef KERNEL |
3558 // Download instrument dll | |
3559 if (library == NULL && strcmp(name, "instrument") == 0) { | |
3560 char *props = Arguments::get_kernel_properties(); | |
3561 char *home = Arguments::get_java_home(); | |
3562 const char *fmt = "%s/bin/java %s -Dkernel.background.download=false" | |
3563 " sun.jkernel.DownloadManager -download client_jvm"; | |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3564 size_t length = strlen(props) + strlen(home) + strlen(fmt) + 1; |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3565 char *cmd = NEW_C_HEAP_ARRAY(char, length); |
0 | 3566 jio_snprintf(cmd, length, fmt, home, props); |
3567 int status = os::fork_and_exec(cmd); | |
3568 FreeHeap(props); | |
3569 if (status == -1) { | |
3570 warning(cmd); | |
3571 vm_exit_during_initialization("fork_and_exec failed: %s", | |
3572 strerror(errno)); | |
3573 } | |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3574 FREE_C_HEAP_ARRAY(char, cmd); |
0 | 3575 // when this comes back the instrument.dll should be where it belongs. |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3576 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
0 | 3577 } |
3578 #endif // KERNEL | |
3579 if (library == NULL) { // Try the local directory | |
3580 char ns[1] = {0}; | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3581 os::dll_build_name(buffer, sizeof(buffer), ns, name); |
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3582 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
0 | 3583 if (library == NULL) { |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3584 const char *sub_msg = " on the library path, with error: "; |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3585 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3586 char *buf = NEW_C_HEAP_ARRAY(char, len); |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3587 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3588 // If we can't find the agent, exit. |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3589 vm_exit_during_initialization(buf, NULL); |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3590 FREE_C_HEAP_ARRAY(char, buf); |
0 | 3591 } |
3592 } | |
3593 } | |
3594 agent->set_os_lib(library); | |
3595 } | |
3596 | |
3597 // Find the OnLoad function. | |
3598 for (size_t symbol_index = 0; symbol_index < num_symbol_entries; symbol_index++) { | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3599 on_load_entry = CAST_TO_FN_PTR(OnLoadEntry_t, os::dll_lookup(library, on_load_symbols[symbol_index])); |
0 | 3600 if (on_load_entry != NULL) break; |
3601 } | |
3602 return on_load_entry; | |
3603 } | |
3604 | |
3605 // Find the JVM_OnLoad entry point | |
3606 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { | |
3607 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; | |
3608 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3609 } | |
3610 | |
3611 // Find the Agent_OnLoad entry point | |
3612 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { | |
3613 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; | |
3614 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3615 } | |
3616 | |
3617 // For backwards compatibility with -Xrun | |
3618 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be | |
3619 // treated like -agentpath: | |
3620 // Must be called before agent libraries are created | |
3621 void Threads::convert_vm_init_libraries_to_agents() { | |
3622 AgentLibrary* agent; | |
3623 AgentLibrary* next; | |
3624 | |
3625 for (agent = Arguments::libraries(); agent != NULL; agent = next) { | |
3626 next = agent->next(); // cache the next agent now as this agent may get moved off this list | |
3627 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3628 | |
3629 // If there is an JVM_OnLoad function it will get called later, | |
3630 // otherwise see if there is an Agent_OnLoad | |
3631 if (on_load_entry == NULL) { | |
3632 on_load_entry = lookup_agent_on_load(agent); | |
3633 if (on_load_entry != NULL) { | |
3634 // switch it to the agent list -- so that Agent_OnLoad will be called, | |
3635 // JVM_OnLoad won't be attempted and Agent_OnUnload will | |
3636 Arguments::convert_library_to_agent(agent); | |
3637 } else { | |
3638 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); | |
3639 } | |
3640 } | |
3641 } | |
3642 } | |
3643 | |
3644 // Create agents for -agentlib: -agentpath: and converted -Xrun | |
3645 // Invokes Agent_OnLoad | |
3646 // Called very early -- before JavaThreads exist | |
3647 void Threads::create_vm_init_agents() { | |
3648 extern struct JavaVM_ main_vm; | |
3649 AgentLibrary* agent; | |
3650 | |
3651 JvmtiExport::enter_onload_phase(); | |
3652 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
3653 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); | |
3654 | |
3655 if (on_load_entry != NULL) { | |
3656 // Invoke the Agent_OnLoad function | |
3657 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3658 if (err != JNI_OK) { | |
3659 vm_exit_during_initialization("agent library failed to init", agent->name()); | |
3660 } | |
3661 } else { | |
3662 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); | |
3663 } | |
3664 } | |
3665 JvmtiExport::enter_primordial_phase(); | |
3666 } | |
3667 | |
3668 extern "C" { | |
3669 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); | |
3670 } | |
3671 | |
3672 void Threads::shutdown_vm_agents() { | |
3673 // Send any Agent_OnUnload notifications | |
3674 const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS; | |
3675 extern struct JavaVM_ main_vm; | |
3676 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
3677 | |
3678 // Find the Agent_OnUnload function. | |
3679 for (uint symbol_index = 0; symbol_index < ARRAY_SIZE(on_unload_symbols); symbol_index++) { | |
3680 Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t, | |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3681 os::dll_lookup(agent->os_lib(), on_unload_symbols[symbol_index])); |
0 | 3682 |
3683 // Invoke the Agent_OnUnload function | |
3684 if (unload_entry != NULL) { | |
3685 JavaThread* thread = JavaThread::current(); | |
3686 ThreadToNativeFromVM ttn(thread); | |
3687 HandleMark hm(thread); | |
3688 (*unload_entry)(&main_vm); | |
3689 break; | |
3690 } | |
3691 } | |
3692 } | |
3693 } | |
3694 | |
3695 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries | |
3696 // Invokes JVM_OnLoad | |
3697 void Threads::create_vm_init_libraries() { | |
3698 extern struct JavaVM_ main_vm; | |
3699 AgentLibrary* agent; | |
3700 | |
3701 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { | |
3702 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3703 | |
3704 if (on_load_entry != NULL) { | |
3705 // Invoke the JVM_OnLoad function | |
3706 JavaThread* thread = JavaThread::current(); | |
3707 ThreadToNativeFromVM ttn(thread); | |
3708 HandleMark hm(thread); | |
3709 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3710 if (err != JNI_OK) { | |
3711 vm_exit_during_initialization("-Xrun library failed to init", agent->name()); | |
3712 } | |
3713 } else { | |
3714 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); | |
3715 } | |
3716 } | |
3717 } | |
3718 | |
3719 // Last thread running calls java.lang.Shutdown.shutdown() | |
3720 void JavaThread::invoke_shutdown_hooks() { | |
3721 HandleMark hm(this); | |
3722 | |
3723 // We could get here with a pending exception, if so clear it now. | |
3724 if (this->has_pending_exception()) { | |
3725 this->clear_pending_exception(); | |
3726 } | |
3727 | |
3728 EXCEPTION_MARK; | |
3729 klassOop k = | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3730 SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
0 | 3731 THREAD); |
3732 if (k != NULL) { | |
3733 // SystemDictionary::resolve_or_null will return null if there was | |
3734 // an exception. If we cannot load the Shutdown class, just don't | |
3735 // call Shutdown.shutdown() at all. This will mean the shutdown hooks | |
3736 // and finalizers (if runFinalizersOnExit is set) won't be run. | |
3737 // Note that if a shutdown hook was registered or runFinalizersOnExit | |
3738 // was called, the Shutdown class would have already been loaded | |
3739 // (Runtime.addShutdownHook and runFinalizersOnExit will load it). | |
3740 instanceKlassHandle shutdown_klass (THREAD, k); | |
3741 JavaValue result(T_VOID); | |
3742 JavaCalls::call_static(&result, | |
3743 shutdown_klass, | |
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3744 vmSymbols::shutdown_method_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3745 vmSymbols::void_method_signature(), |
0 | 3746 THREAD); |
3747 } | |
3748 CLEAR_PENDING_EXCEPTION; | |
3749 } | |
3750 | |
3751 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when | |
3752 // the program falls off the end of main(). Another VM exit path is through | |
3753 // vm_exit() when the program calls System.exit() to return a value or when | |
3754 // there is a serious error in VM. The two shutdown paths are not exactly | |
3755 // the same, but they share Shutdown.shutdown() at Java level and before_exit() | |
3756 // and VM_Exit op at VM level. | |
3757 // | |
3758 // Shutdown sequence: | |
3759 // + Wait until we are the last non-daemon thread to execute | |
3760 // <-- every thing is still working at this moment --> | |
3761 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level | |
3762 // shutdown hooks, run finalizers if finalization-on-exit | |
3763 // + Call before_exit(), prepare for VM exit | |
3764 // > run VM level shutdown hooks (they are registered through JVM_OnExit(), | |
3765 // currently the only user of this mechanism is File.deleteOnExit()) | |
3766 // > stop flat profiler, StatSampler, watcher thread, CMS threads, | |
3767 // post thread end and vm death events to JVMTI, | |
3768 // stop signal thread | |
3769 // + Call JavaThread::exit(), it will: | |
3770 // > release JNI handle blocks, remove stack guard pages | |
3771 // > remove this thread from Threads list | |
3772 // <-- no more Java code from this thread after this point --> | |
3773 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop | |
3774 // the compiler threads at safepoint | |
3775 // <-- do not use anything that could get blocked by Safepoint --> | |
3776 // + Disable tracing at JNI/JVM barriers | |
3777 // + Set _vm_exited flag for threads that are still running native code | |
3778 // + Delete this thread | |
3779 // + Call exit_globals() | |
3780 // > deletes tty | |
3781 // > deletes PerfMemory resources | |
3782 // + Return to caller | |
3783 | |
3784 bool Threads::destroy_vm() { | |
3785 JavaThread* thread = JavaThread::current(); | |
3786 | |
3787 // Wait until we are the last non-daemon thread to execute | |
3788 { MutexLocker nu(Threads_lock); | |
3789 while (Threads::number_of_non_daemon_threads() > 1 ) | |
3790 // This wait should make safepoint checks, wait without a timeout, | |
3791 // and wait as a suspend-equivalent condition. | |
3792 // | |
3793 // Note: If the FlatProfiler is running and this thread is waiting | |
3794 // for another non-daemon thread to finish, then the FlatProfiler | |
3795 // is waiting for the external suspend request on this thread to | |
3796 // complete. wait_for_ext_suspend_completion() will eventually | |
3797 // timeout, but that takes time. Making this wait a suspend- | |
3798 // equivalent condition solves that timeout problem. | |
3799 // | |
3800 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
3801 Mutex::_as_suspend_equivalent_flag); | |
3802 } | |
3803 | |
3804 // Hang forever on exit if we are reporting an error. | |
3805 if (ShowMessageBoxOnError && is_error_reported()) { | |
3806 os::infinite_sleep(); | |
3807 } | |
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
2203
diff
changeset
|
3808 os::wait_for_keypress_at_exit(); |
0 | 3809 |
3810 if (JDK_Version::is_jdk12x_version()) { | |
3811 // We are the last thread running, so check if finalizers should be run. | |
3812 // For 1.3 or later this is done in thread->invoke_shutdown_hooks() | |
3813 HandleMark rm(thread); | |
3814 Universe::run_finalizers_on_exit(); | |
3815 } else { | |
3816 // run Java level shutdown hooks | |
3817 thread->invoke_shutdown_hooks(); | |
3818 } | |
3819 | |
3820 before_exit(thread); | |
3821 | |
3822 thread->exit(true); | |
3823 | |
3824 // Stop VM thread. | |
3825 { | |
3826 // 4945125 The vm thread comes to a safepoint during exit. | |
3827 // GC vm_operations can get caught at the safepoint, and the | |
3828 // heap is unparseable if they are caught. Grab the Heap_lock | |
3829 // to prevent this. The GC vm_operations will not be able to | |
3830 // queue until after the vm thread is dead. | |
3769
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3831 // After this point, we'll never emerge out of the safepoint before |
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3832 // the VM exits, so concurrent GC threads do not need to be explicitly |
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3833 // stopped; they remain inactive until the process exits. |
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3834 // Note: some concurrent G1 threads may be running during a safepoint, |
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3835 // but these will not be accessing the heap, just some G1-specific side |
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3836 // data structures that are not accessed by any other threads but them |
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3837 // after this point in a terminal safepoint. |
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
3838 |
0 | 3839 MutexLocker ml(Heap_lock); |
3840 | |
3841 VMThread::wait_for_vm_thread_exit(); | |
3842 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); | |
3843 VMThread::destroy(); | |
3844 } | |
3845 | |
3846 // clean up ideal graph printers | |
3847 #if defined(COMPILER2) && !defined(PRODUCT) | |
3848 IdealGraphPrinter::clean_up(); | |
3849 #endif | |
3850 | |
3851 // Now, all Java threads are gone except daemon threads. Daemon threads | |
3852 // running Java code or in VM are stopped by the Safepoint. However, | |
3853 // daemon threads executing native code are still running. But they | |
3854 // will be stopped at native=>Java/VM barriers. Note that we can't | |
3855 // simply kill or suspend them, as it is inherently deadlock-prone. | |
3856 | |
3857 #ifndef PRODUCT | |
3858 // disable function tracing at JNI/JVM barriers | |
3859 TraceJNICalls = false; | |
3860 TraceJVMCalls = false; | |
3861 TraceRuntimeCalls = false; | |
3862 #endif | |
3863 | |
3864 VM_Exit::set_vm_exited(); | |
3865 | |
3866 notify_vm_shutdown(); | |
3867 | |
3868 delete thread; | |
3869 | |
3870 // exit_globals() will delete tty | |
3871 exit_globals(); | |
3872 | |
3873 return true; | |
3874 } | |
3875 | |
3876 | |
3877 jboolean Threads::is_supported_jni_version_including_1_1(jint version) { | |
3878 if (version == JNI_VERSION_1_1) return JNI_TRUE; | |
3879 return is_supported_jni_version(version); | |
3880 } | |
3881 | |
3882 | |
3883 jboolean Threads::is_supported_jni_version(jint version) { | |
3884 if (version == JNI_VERSION_1_2) return JNI_TRUE; | |
3885 if (version == JNI_VERSION_1_4) return JNI_TRUE; | |
3886 if (version == JNI_VERSION_1_6) return JNI_TRUE; | |
3887 return JNI_FALSE; | |
3888 } | |
3889 | |
3890 | |
3891 void Threads::add(JavaThread* p, bool force_daemon) { | |
3892 // The threads lock must be owned at this point | |
3893 assert_locked_or_safepoint(Threads_lock); | |
1842
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
3894 |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
3895 // See the comment for this method in thread.hpp for its purpose and |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
3896 // why it is called here. |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
3897 p->initialize_queues(); |
0 | 3898 p->set_next(_thread_list); |
3899 _thread_list = p; | |
3900 _number_of_threads++; | |
3901 oop threadObj = p->threadObj(); | |
3902 bool daemon = true; | |
3903 // Bootstrapping problem: threadObj can be null for initial | |
3904 // JavaThread (or for threads attached via JNI) | |
3905 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { | |
3906 _number_of_non_daemon_threads++; | |
3907 daemon = false; | |
3908 } | |
3909 | |
3910 ThreadService::add_thread(p, daemon); | |
3911 | |
3912 // Possible GC point. | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4800
diff
changeset
|
3913 Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
0 | 3914 } |
3915 | |
3916 void Threads::remove(JavaThread* p) { | |
3917 // Extra scope needed for Thread_lock, so we can check | |
3918 // that we do not remove thread without safepoint code notice | |
3919 { MutexLocker ml(Threads_lock); | |
3920 | |
3921 assert(includes(p), "p must be present"); | |
3922 | |
3923 JavaThread* current = _thread_list; | |
3924 JavaThread* prev = NULL; | |
3925 | |
3926 while (current != p) { | |
3927 prev = current; | |
3928 current = current->next(); | |
3929 } | |
3930 | |
3931 if (prev) { | |
3932 prev->set_next(current->next()); | |
3933 } else { | |
3934 _thread_list = p->next(); | |
3935 } | |
3936 _number_of_threads--; | |
3937 oop threadObj = p->threadObj(); | |
3938 bool daemon = true; | |
3939 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { | |
3940 _number_of_non_daemon_threads--; | |
3941 daemon = false; | |
3942 | |
3943 // Only one thread left, do a notify on the Threads_lock so a thread waiting | |
3944 // on destroy_vm will wake up. | |
3945 if (number_of_non_daemon_threads() == 1) | |
3946 Threads_lock->notify_all(); | |
3947 } | |
3948 ThreadService::remove_thread(p, daemon); | |
3949 | |
3950 // Make sure that safepoint code disregard this thread. This is needed since | |
3951 // the thread might mess around with locks after this point. This can cause it | |
3952 // to do callbacks into the safepoint code. However, the safepoint code is not aware | |
3953 // of this thread since it is removed from the queue. | |
3954 p->set_terminated_value(); | |
3955 } // unlock Threads_lock | |
3956 | |
3957 // Since Events::log uses a lock, we grab it outside the Threads_lock | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4800
diff
changeset
|
3958 Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
0 | 3959 } |
3960 | |
3961 // Threads_lock must be held when this is called (or must be called during a safepoint) | |
3962 bool Threads::includes(JavaThread* p) { | |
3963 assert(Threads_lock->is_locked(), "sanity check"); | |
3964 ALL_JAVA_THREADS(q) { | |
3965 if (q == p ) { | |
3966 return true; | |
3967 } | |
3968 } | |
3969 return false; | |
3970 } | |
3971 | |
3972 // Operations on the Threads list for GC. These are not explicitly locked, | |
3973 // but the garbage collector must provide a safe context for them to run. | |
3974 // In particular, these things should never be called when the Threads_lock | |
3975 // is held by some other thread. (Note: the Safepoint abstraction also | |
3976 // uses the Threads_lock to gurantee this property. It also makes sure that | |
3977 // all threads gets blocked when exiting or starting). | |
3978 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
3979 void Threads::oops_do(OopClosure* f, CodeBlobClosure* cf) { |
0 | 3980 ALL_JAVA_THREADS(p) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
3981 p->oops_do(f, cf); |
0 | 3982 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
3983 VMThread::vm_thread()->oops_do(f, cf); |
0 | 3984 } |
3985 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
3986 void Threads::possibly_parallel_oops_do(OopClosure* f, CodeBlobClosure* cf) { |
0 | 3987 // Introduce a mechanism allowing parallel threads to claim threads as |
3988 // root groups. Overhead should be small enough to use all the time, | |
3989 // even in sequential code. | |
3990 SharedHeap* sh = SharedHeap::heap(); | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3991 // Cannot yet substitute active_workers for n_par_threads |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3992 // because of G1CollectedHeap::verify() use of |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3993 // SharedHeap::process_strong_roots(). n_par_threads == 0 will |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3994 // turn off parallelism in process_strong_roots while active_workers |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3995 // is being used for parallelism elsewhere. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3996 bool is_par = sh->n_par_threads() > 0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3997 assert(!is_par || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3998 (SharedHeap::heap()->n_par_threads() == |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
3999 SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
0 | 4000 int cp = SharedHeap::heap()->strong_roots_parity(); |
4001 ALL_JAVA_THREADS(p) { | |
4002 if (p->claim_oops_do(is_par, cp)) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4003 p->oops_do(f, cf); |
0 | 4004 } |
4005 } | |
4006 VMThread* vmt = VMThread::vm_thread(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4007 if (vmt->claim_oops_do(is_par, cp)) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4008 vmt->oops_do(f, cf); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4009 } |
0 | 4010 } |
4011 | |
4012 #ifndef SERIALGC | |
4013 // Used by ParallelScavenge | |
4014 void Threads::create_thread_roots_tasks(GCTaskQueue* q) { | |
4015 ALL_JAVA_THREADS(p) { | |
4016 q->enqueue(new ThreadRootsTask(p)); | |
4017 } | |
4018 q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); | |
4019 } | |
4020 | |
4021 // Used by Parallel Old | |
4022 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { | |
4023 ALL_JAVA_THREADS(p) { | |
4024 q->enqueue(new ThreadRootsMarkingTask(p)); | |
4025 } | |
4026 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); | |
4027 } | |
4028 #endif // SERIALGC | |
4029 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4030 void Threads::nmethods_do(CodeBlobClosure* cf) { |
0 | 4031 ALL_JAVA_THREADS(p) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4032 p->nmethods_do(cf); |
0 | 4033 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4034 VMThread::vm_thread()->nmethods_do(cf); |
0 | 4035 } |
4036 | |
4037 void Threads::gc_epilogue() { | |
4038 ALL_JAVA_THREADS(p) { | |
4039 p->gc_epilogue(); | |
4040 } | |
4041 } | |
4042 | |
4043 void Threads::gc_prologue() { | |
4044 ALL_JAVA_THREADS(p) { | |
4045 p->gc_prologue(); | |
4046 } | |
4047 } | |
4048 | |
4049 void Threads::deoptimized_wrt_marked_nmethods() { | |
4050 ALL_JAVA_THREADS(p) { | |
4051 p->deoptimized_wrt_marked_nmethods(); | |
4052 } | |
4053 } | |
4054 | |
4055 | |
4056 // Get count Java threads that are waiting to enter the specified monitor. | |
4057 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, | |
4058 address monitor, bool doLock) { | |
4059 assert(doLock || SafepointSynchronize::is_at_safepoint(), | |
4060 "must grab Threads_lock or be at safepoint"); | |
4061 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); | |
4062 | |
4063 int i = 0; | |
4064 { | |
4065 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4066 ALL_JAVA_THREADS(p) { | |
4067 if (p->is_Compiler_thread()) continue; | |
4068 | |
4069 address pending = (address)p->current_pending_monitor(); | |
4070 if (pending == monitor) { // found a match | |
4071 if (i < count) result->append(p); // save the first count matches | |
4072 i++; | |
4073 } | |
4074 } | |
4075 } | |
4076 return result; | |
4077 } | |
4078 | |
4079 | |
4080 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { | |
4081 assert(doLock || | |
4082 Threads_lock->owned_by_self() || | |
4083 SafepointSynchronize::is_at_safepoint(), | |
4084 "must grab Threads_lock or be at safepoint"); | |
4085 | |
4086 // NULL owner means not locked so we can skip the search | |
4087 if (owner == NULL) return NULL; | |
4088 | |
4089 { | |
4090 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4091 ALL_JAVA_THREADS(p) { | |
4092 // first, see if owner is the address of a Java thread | |
4093 if (owner == (address)p) return p; | |
4094 } | |
4095 } | |
4096 assert(UseHeavyMonitors == false, "Did not find owning Java thread with UseHeavyMonitors enabled"); | |
4097 if (UseHeavyMonitors) return NULL; | |
4098 | |
4099 // | |
4100 // If we didn't find a matching Java thread and we didn't force use of | |
4101 // heavyweight monitors, then the owner is the stack address of the | |
4102 // Lock Word in the owning Java thread's stack. | |
4103 // | |
4104 JavaThread* the_owner = NULL; | |
4105 { | |
4106 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4107 ALL_JAVA_THREADS(q) { | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4108 if (q->is_lock_owned(owner)) { |
0 | 4109 the_owner = q; |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4110 break; |
0 | 4111 } |
4112 } | |
4113 } | |
4114 assert(the_owner != NULL, "Did not find owning Java thread for lock word address"); | |
4115 return the_owner; | |
4116 } | |
4117 | |
4118 // Threads::print_on() is called at safepoint by VM_PrintThreads operation. | |
4119 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { | |
4120 char buf[32]; | |
4121 st->print_cr(os::local_time_string(buf, sizeof(buf))); | |
4122 | |
4123 st->print_cr("Full thread dump %s (%s %s):", | |
4124 Abstract_VM_Version::vm_name(), | |
4125 Abstract_VM_Version::vm_release(), | |
4126 Abstract_VM_Version::vm_info_string() | |
4127 ); | |
4128 st->cr(); | |
4129 | |
4130 #ifndef SERIALGC | |
4131 // Dump concurrent locks | |
4132 ConcurrentLocksDump concurrent_locks; | |
4133 if (print_concurrent_locks) { | |
4134 concurrent_locks.dump_at_safepoint(); | |
4135 } | |
4136 #endif // SERIALGC | |
4137 | |
4138 ALL_JAVA_THREADS(p) { | |
4139 ResourceMark rm; | |
4140 p->print_on(st); | |
4141 if (print_stacks) { | |
4142 if (internal_format) { | |
4143 p->trace_stack(); | |
4144 } else { | |
4145 p->print_stack_on(st); | |
4146 } | |
4147 } | |
4148 st->cr(); | |
4149 #ifndef SERIALGC | |
4150 if (print_concurrent_locks) { | |
4151 concurrent_locks.print_locks_on(p, st); | |
4152 } | |
4153 #endif // SERIALGC | |
4154 } | |
4155 | |
4156 VMThread::vm_thread()->print_on(st); | |
4157 st->cr(); | |
4158 Universe::heap()->print_gc_threads_on(st); | |
4159 WatcherThread* wt = WatcherThread::watcher_thread(); | |
4160 if (wt != NULL) wt->print_on(st); | |
4161 st->cr(); | |
4162 CompileBroker::print_compiler_threads_on(st); | |
4163 st->flush(); | |
4164 } | |
4165 | |
4166 // Threads::print_on_error() is called by fatal error handler. It's possible | |
4167 // that VM is not at safepoint and/or current thread is inside signal handler. | |
4168 // Don't print stack trace, as the stack may not be walkable. Don't allocate | |
4169 // memory (even in resource area), it might deadlock the error handler. | |
4170 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { | |
4171 bool found_current = false; | |
4172 st->print_cr("Java Threads: ( => current thread )"); | |
4173 ALL_JAVA_THREADS(thread) { | |
4174 bool is_current = (current == thread); | |
4175 found_current = found_current || is_current; | |
4176 | |
4177 st->print("%s", is_current ? "=>" : " "); | |
4178 | |
4179 st->print(PTR_FORMAT, thread); | |
4180 st->print(" "); | |
4181 thread->print_on_error(st, buf, buflen); | |
4182 st->cr(); | |
4183 } | |
4184 st->cr(); | |
4185 | |
4186 st->print_cr("Other Threads:"); | |
4187 if (VMThread::vm_thread()) { | |
4188 bool is_current = (current == VMThread::vm_thread()); | |
4189 found_current = found_current || is_current; | |
4190 st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); | |
4191 | |
4192 st->print(PTR_FORMAT, VMThread::vm_thread()); | |
4193 st->print(" "); | |
4194 VMThread::vm_thread()->print_on_error(st, buf, buflen); | |
4195 st->cr(); | |
4196 } | |
4197 WatcherThread* wt = WatcherThread::watcher_thread(); | |
4198 if (wt != NULL) { | |
4199 bool is_current = (current == wt); | |
4200 found_current = found_current || is_current; | |
4201 st->print("%s", is_current ? "=>" : " "); | |
4202 | |
4203 st->print(PTR_FORMAT, wt); | |
4204 st->print(" "); | |
4205 wt->print_on_error(st, buf, buflen); | |
4206 st->cr(); | |
4207 } | |
4208 if (!found_current) { | |
4209 st->cr(); | |
4210 st->print("=>" PTR_FORMAT " (exited) ", current); | |
4211 current->print_on_error(st, buf, buflen); | |
4212 st->cr(); | |
4213 } | |
4214 } | |
4215 | |
1878 | 4216 // Internal SpinLock and Mutex |
4217 // Based on ParkEvent | |
4218 | |
4219 // Ad-hoc mutual exclusion primitives: SpinLock and Mux | |
0 | 4220 // |
1878 | 4221 // We employ SpinLocks _only for low-contention, fixed-length |
4222 // short-duration critical sections where we're concerned | |
4223 // about native mutex_t or HotSpot Mutex:: latency. | |
4224 // The mux construct provides a spin-then-block mutual exclusion | |
4225 // mechanism. | |
4226 // | |
4227 // Testing has shown that contention on the ListLock guarding gFreeList | |
4228 // is common. If we implement ListLock as a simple SpinLock it's common | |
4229 // for the JVM to devolve to yielding with little progress. This is true | |
4230 // despite the fact that the critical sections protected by ListLock are | |
4231 // extremely short. | |
0 | 4232 // |
1878 | 4233 // TODO-FIXME: ListLock should be of type SpinLock. |
4234 // We should make this a 1st-class type, integrated into the lock | |
4235 // hierarchy as leaf-locks. Critically, the SpinLock structure | |
4236 // should have sufficient padding to avoid false-sharing and excessive | |
4237 // cache-coherency traffic. | |
4238 | |
4239 | |
4240 typedef volatile int SpinLockT ; | |
4241 | |
4242 void Thread::SpinAcquire (volatile int * adr, const char * LockName) { | |
4243 if (Atomic::cmpxchg (1, adr, 0) == 0) { | |
4244 return ; // normal fast-path return | |
4245 } | |
4246 | |
4247 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy. | |
4248 TEVENT (SpinAcquire - ctx) ; | |
4249 int ctr = 0 ; | |
4250 int Yields = 0 ; | |
0 | 4251 for (;;) { |
1878 | 4252 while (*adr != 0) { |
4253 ++ctr ; | |
4254 if ((ctr & 0xFFF) == 0 || !os::is_MP()) { | |
4255 if (Yields > 5) { | |
4256 // Consider using a simple NakedSleep() instead. | |
4257 // Then SpinAcquire could be called by non-JVM threads | |
4258 Thread::current()->_ParkEvent->park(1) ; | |
4259 } else { | |
4260 os::NakedYield() ; | |
4261 ++Yields ; | |
4262 } | |
4263 } else { | |
4264 SpinPause() ; | |
0 | 4265 } |
1878 | 4266 } |
4267 if (Atomic::cmpxchg (1, adr, 0) == 0) return ; | |
0 | 4268 } |
4269 } | |
4270 | |
1878 | 4271 void Thread::SpinRelease (volatile int * adr) { |
4272 assert (*adr != 0, "invariant") ; | |
4273 OrderAccess::fence() ; // guarantee at least release consistency. | |
4274 // Roach-motel semantics. | |
4275 // It's safe if subsequent LDs and STs float "up" into the critical section, | |
4276 // but prior LDs and STs within the critical section can't be allowed | |
4277 // to reorder or float past the ST that releases the lock. | |
4278 *adr = 0 ; | |
0 | 4279 } |
4280 | |
1878 | 4281 // muxAcquire and muxRelease: |
4282 // | |
4283 // * muxAcquire and muxRelease support a single-word lock-word construct. | |
4284 // The LSB of the word is set IFF the lock is held. | |
4285 // The remainder of the word points to the head of a singly-linked list | |
4286 // of threads blocked on the lock. | |
4287 // | |
4288 // * The current implementation of muxAcquire-muxRelease uses its own | |
4289 // dedicated Thread._MuxEvent instance. If we're interested in | |
4290 // minimizing the peak number of extant ParkEvent instances then | |
4291 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long | |
4292 // as certain invariants were satisfied. Specifically, care would need | |
4293 // to be taken with regards to consuming unpark() "permits". | |
4294 // A safe rule of thumb is that a thread would never call muxAcquire() | |
4295 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently | |
4296 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could | |
4297 // consume an unpark() permit intended for monitorenter, for instance. | |
4298 // One way around this would be to widen the restricted-range semaphore | |
4299 // implemented in park(). Another alternative would be to provide | |
4300 // multiple instances of the PlatformEvent() for each thread. One | |
4301 // instance would be dedicated to muxAcquire-muxRelease, for instance. | |
4302 // | |
4303 // * Usage: | |
4304 // -- Only as leaf locks | |
4305 // -- for short-term locking only as muxAcquire does not perform | |
4306 // thread state transitions. | |
4307 // | |
4308 // Alternatives: | |
4309 // * We could implement muxAcquire and muxRelease with MCS or CLH locks | |
4310 // but with parking or spin-then-park instead of pure spinning. | |
4311 // * Use Taura-Oyama-Yonenzawa locks. | |
4312 // * It's possible to construct a 1-0 lock if we encode the lockword as | |
4313 // (List,LockByte). Acquire will CAS the full lockword while Release | |
4314 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so | |
4315 // acquiring threads use timers (ParkTimed) to detect and recover from | |
4316 // the stranding window. Thread/Node structures must be aligned on 256-byte | |
4317 // boundaries by using placement-new. | |
4318 // * Augment MCS with advisory back-link fields maintained with CAS(). | |
4319 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. | |
4320 // The validity of the backlinks must be ratified before we trust the value. | |
4321 // If the backlinks are invalid the exiting thread must back-track through the | |
4322 // the forward links, which are always trustworthy. | |
4323 // * Add a successor indication. The LockWord is currently encoded as | |
4324 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable | |
4325 // to provide the usual futile-wakeup optimization. | |
4326 // See RTStt for details. | |
4327 // * Consider schedctl.sc_nopreempt to cover the critical section. | |
4328 // | |
4329 | |
4330 | |
4331 typedef volatile intptr_t MutexT ; // Mux Lock-word | |
4332 enum MuxBits { LOCKBIT = 1 } ; | |
4333 | |
4334 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { | |
4335 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4336 if (w == 0) return ; | |
4337 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4338 return ; | |
4339 } | |
4340 | |
4341 TEVENT (muxAcquire - Contention) ; | |
4342 ParkEvent * const Self = Thread::current()->_MuxEvent ; | |
4343 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; | |
0 | 4344 for (;;) { |
1878 | 4345 int its = (os::is_MP() ? 100 : 0) + 1 ; |
4346 | |
4347 // Optional spin phase: spin-then-park strategy | |
4348 while (--its >= 0) { | |
4349 w = *Lock ; | |
4350 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4351 return ; | |
4352 } | |
4353 } | |
4354 | |
4355 Self->reset() ; | |
4356 Self->OnList = intptr_t(Lock) ; | |
4357 // The following fence() isn't _strictly necessary as the subsequent | |
4358 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4359 OrderAccess::fence(); | |
4360 for (;;) { | |
4361 w = *Lock ; | |
4362 if ((w & LOCKBIT) == 0) { | |
4363 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4364 Self->OnList = 0 ; // hygiene - allows stronger asserts | |
4365 return ; | |
4366 } | |
4367 continue ; // Interference -- *Lock changed -- Just retry | |
0 | 4368 } |
1878 | 4369 assert (w & LOCKBIT, "invariant") ; |
4370 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4371 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; | |
4372 } | |
4373 | |
4374 while (Self->OnList != 0) { | |
4375 Self->park() ; | |
4376 } | |
0 | 4377 } |
4378 } | |
4379 | |
1878 | 4380 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
4381 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4382 if (w == 0) return ; | |
4383 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4384 return ; | |
4385 } | |
4386 | |
4387 TEVENT (muxAcquire - Contention) ; | |
4388 ParkEvent * ReleaseAfter = NULL ; | |
4389 if (ev == NULL) { | |
4390 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; | |
4391 } | |
4392 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; | |
4393 for (;;) { | |
4394 guarantee (ev->OnList == 0, "invariant") ; | |
4395 int its = (os::is_MP() ? 100 : 0) + 1 ; | |
4396 | |
4397 // Optional spin phase: spin-then-park strategy | |
4398 while (--its >= 0) { | |
4399 w = *Lock ; | |
4400 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4401 if (ReleaseAfter != NULL) { | |
4402 ParkEvent::Release (ReleaseAfter) ; | |
4403 } | |
4404 return ; | |
4405 } | |
4406 } | |
4407 | |
4408 ev->reset() ; | |
4409 ev->OnList = intptr_t(Lock) ; | |
4410 // The following fence() isn't _strictly necessary as the subsequent | |
4411 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4412 OrderAccess::fence(); | |
4413 for (;;) { | |
4414 w = *Lock ; | |
4415 if ((w & LOCKBIT) == 0) { | |
4416 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4417 ev->OnList = 0 ; | |
4418 // We call ::Release while holding the outer lock, thus | |
4419 // artificially lengthening the critical section. | |
4420 // Consider deferring the ::Release() until the subsequent unlock(), | |
4421 // after we've dropped the outer lock. | |
4422 if (ReleaseAfter != NULL) { | |
4423 ParkEvent::Release (ReleaseAfter) ; | |
4424 } | |
4425 return ; | |
4426 } | |
4427 continue ; // Interference -- *Lock changed -- Just retry | |
4428 } | |
4429 assert (w & LOCKBIT, "invariant") ; | |
4430 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4431 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; | |
4432 } | |
4433 | |
4434 while (ev->OnList != 0) { | |
4435 ev->park() ; | |
4436 } | |
4437 } | |
4438 } | |
4439 | |
4440 // Release() must extract a successor from the list and then wake that thread. | |
4441 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme | |
4442 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based | |
4443 // Release() would : | |
4444 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. | |
4445 // (B) Extract a successor from the private list "in-hand" | |
4446 // (C) attempt to CAS() the residual back into *Lock over null. | |
4447 // If there were any newly arrived threads and the CAS() would fail. | |
4448 // In that case Release() would detach the RATs, re-merge the list in-hand | |
4449 // with the RATs and repeat as needed. Alternately, Release() might | |
4450 // detach and extract a successor, but then pass the residual list to the wakee. | |
4451 // The wakee would be responsible for reattaching and remerging before it | |
4452 // competed for the lock. | |
4453 // | |
4454 // Both "pop" and DMR are immune from ABA corruption -- there can be | |
4455 // multiple concurrent pushers, but only one popper or detacher. | |
4456 // This implementation pops from the head of the list. This is unfair, | |
4457 // but tends to provide excellent throughput as hot threads remain hot. | |
4458 // (We wake recently run threads first). | |
4459 | |
4460 void Thread::muxRelease (volatile intptr_t * Lock) { | |
4461 for (;;) { | |
4462 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; | |
4463 assert (w & LOCKBIT, "invariant") ; | |
4464 if (w == LOCKBIT) return ; | |
4465 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; | |
4466 assert (List != NULL, "invariant") ; | |
4467 assert (List->OnList == intptr_t(Lock), "invariant") ; | |
4468 ParkEvent * nxt = List->ListNext ; | |
4469 | |
4470 // The following CAS() releases the lock and pops the head element. | |
4471 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { | |
4472 continue ; | |
4473 } | |
4474 List->OnList = 0 ; | |
4475 OrderAccess::fence() ; | |
4476 List->unpark () ; | |
4477 return ; | |
4478 } | |
4479 } | |
4480 | |
4481 | |
0 | 4482 void Threads::verify() { |
4483 ALL_JAVA_THREADS(p) { | |
4484 p->verify(); | |
4485 } | |
4486 VMThread* thread = VMThread::vm_thread(); | |
4487 if (thread != NULL) thread->verify(); | |
4488 } |