Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.cpp @ 17977:0b9500028980
8029381: assert(is_method_type()) failed: bad cast
Summary: Access to method_type and appendix from constant pool (cpcache) needs to be guarded by is_f1_null() because of racy update/initialization.
Reviewed-by: kvn, coleenp, jrose
author | drchase |
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date | Mon, 02 Jun 2014 14:32:29 -0400 |
parents | 78bbf4d43a14 |
children | e204777ac770 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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" | |
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34 #include "interpreter/oopMapCache.hpp" |
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35 #include "jvmtifiles/jvmtiEnv.hpp" |
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36 #include "memory/gcLocker.inline.hpp" |
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37 #include "memory/metaspaceShared.hpp" |
1972 | 38 #include "memory/oopFactory.hpp" |
39 #include "memory/universe.inline.hpp" | |
40 #include "oops/instanceKlass.hpp" | |
41 #include "oops/objArrayOop.hpp" | |
42 #include "oops/oop.inline.hpp" | |
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43 #include "oops/symbol.hpp" |
1972 | 44 #include "prims/jvm_misc.hpp" |
45 #include "prims/jvmtiExport.hpp" | |
46 #include "prims/jvmtiThreadState.hpp" | |
47 #include "prims/privilegedStack.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" | |
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67 #include "runtime/thread.inline.hpp" |
1972 | 68 #include "runtime/threadCritical.hpp" |
69 #include "runtime/threadLocalStorage.hpp" | |
70 #include "runtime/vframe.hpp" | |
71 #include "runtime/vframeArray.hpp" | |
72 #include "runtime/vframe_hp.hpp" | |
73 #include "runtime/vmThread.hpp" | |
74 #include "runtime/vm_operations.hpp" | |
75 #include "services/attachListener.hpp" | |
76 #include "services/management.hpp" | |
6197 | 77 #include "services/memTracker.hpp" |
1972 | 78 #include "services/threadService.hpp" |
10405 | 79 #include "trace/tracing.hpp" |
80 #include "trace/traceMacros.hpp" | |
1972 | 81 #include "utilities/defaultStream.hpp" |
82 #include "utilities/dtrace.hpp" | |
83 #include "utilities/events.hpp" | |
84 #include "utilities/preserveException.hpp" | |
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85 #include "utilities/macros.hpp" |
1972 | 86 #ifdef TARGET_OS_FAMILY_linux |
87 # include "os_linux.inline.hpp" | |
88 #endif | |
89 #ifdef TARGET_OS_FAMILY_solaris | |
90 # include "os_solaris.inline.hpp" | |
91 #endif | |
92 #ifdef TARGET_OS_FAMILY_windows | |
93 # include "os_windows.inline.hpp" | |
94 #endif | |
3960 | 95 #ifdef TARGET_OS_FAMILY_bsd |
96 # include "os_bsd.inline.hpp" | |
97 #endif | |
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98 #if INCLUDE_ALL_GCS |
1972 | 99 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" |
100 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
101 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
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102 #endif // INCLUDE_ALL_GCS |
1972 | 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 | |
17780 | 110 #if INCLUDE_RTM_OPT |
111 #include "runtime/rtmLocking.hpp" | |
112 #endif | |
0 | 113 |
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114 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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115 |
0 | 116 #ifdef DTRACE_ENABLED |
117 | |
118 // Only bother with this argument setup if dtrace is available | |
119 | |
4006 | 120 #ifndef USDT2 |
0 | 121 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
122 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); | |
123 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, | |
124 intptr_t, intptr_t, bool); | |
125 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, | |
126 intptr_t, intptr_t, bool); | |
127 | |
128 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
129 { \ | |
130 ResourceMark rm(this); \ | |
131 int len = 0; \ | |
132 const char* name = (javathread)->get_thread_name(); \ | |
133 len = strlen(name); \ | |
134 HS_DTRACE_PROBE5(hotspot, thread__##probe, \ | |
135 name, len, \ | |
136 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
137 (javathread)->osthread()->thread_id(), \ | |
138 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
139 } | |
140 | |
4006 | 141 #else /* USDT2 */ |
142 | |
143 #define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START | |
144 #define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP | |
145 | |
146 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
147 { \ | |
148 ResourceMark rm(this); \ | |
149 int len = 0; \ | |
150 const char* name = (javathread)->get_thread_name(); \ | |
151 len = strlen(name); \ | |
152 HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ | |
153 (char *) name, len, \ | |
154 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
155 (uintptr_t) (javathread)->osthread()->thread_id(), \ | |
156 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
157 } | |
158 | |
159 #endif /* USDT2 */ | |
160 | |
0 | 161 #else // ndef DTRACE_ENABLED |
162 | |
163 #define DTRACE_THREAD_PROBE(probe, javathread) | |
164 | |
165 #endif // ndef DTRACE_ENABLED | |
166 | |
6197 | 167 |
0 | 168 // Class hierarchy |
169 // - Thread | |
170 // - VMThread | |
171 // - WatcherThread | |
172 // - ConcurrentMarkSweepThread | |
173 // - JavaThread | |
174 // - CompilerThread | |
175 | |
176 // ======= Thread ======== | |
177 // Support for forcing alignment of thread objects for biased locking | |
6197 | 178 void* Thread::allocate(size_t size, bool throw_excpt, MEMFLAGS flags) { |
0 | 179 if (UseBiasedLocking) { |
180 const int alignment = markOopDesc::biased_lock_alignment; | |
181 size_t aligned_size = size + (alignment - sizeof(intptr_t)); | |
6197 | 182 void* real_malloc_addr = throw_excpt? AllocateHeap(aligned_size, flags, CURRENT_PC) |
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183 : AllocateHeap(aligned_size, flags, CURRENT_PC, |
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184 AllocFailStrategy::RETURN_NULL); |
0 | 185 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); |
186 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= | |
187 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), | |
188 "JavaThread alignment code overflowed allocated storage"); | |
189 if (TraceBiasedLocking) { | |
190 if (aligned_addr != real_malloc_addr) | |
191 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, | |
192 real_malloc_addr, aligned_addr); | |
193 } | |
194 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; | |
195 return aligned_addr; | |
196 } else { | |
6197 | 197 return throw_excpt? AllocateHeap(size, flags, CURRENT_PC) |
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198 : AllocateHeap(size, flags, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
0 | 199 } |
200 } | |
201 | |
202 void Thread::operator delete(void* p) { | |
203 if (UseBiasedLocking) { | |
204 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; | |
6197 | 205 FreeHeap(real_malloc_addr, mtThread); |
0 | 206 } else { |
6197 | 207 FreeHeap(p, mtThread); |
0 | 208 } |
209 } | |
210 | |
211 | |
212 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, | |
213 // JavaThread | |
214 | |
215 | |
216 Thread::Thread() { | |
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217 // stack and get_thread |
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218 set_stack_base(NULL); |
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219 set_stack_size(0); |
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220 set_self_raw_id(0); |
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221 set_lgrp_id(-1); |
0 | 222 |
223 // allocated data structures | |
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224 set_osthread(NULL); |
6197 | 225 set_resource_area(new (mtThread)ResourceArea()); |
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226 DEBUG_ONLY(_current_resource_mark = NULL;) |
6197 | 227 set_handle_area(new (mtThread) HandleArea(NULL)); |
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228 set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(30, true)); |
0 | 229 set_active_handles(NULL); |
230 set_free_handle_block(NULL); | |
231 set_last_handle_mark(NULL); | |
232 | |
233 // This initial value ==> never claimed. | |
234 _oops_do_parity = 0; | |
235 | |
236 // the handle mark links itself to last_handle_mark | |
10135 | 237 new HandleMark(this); |
238 | |
0 | 239 // plain initialization |
240 debug_only(_owned_locks = NULL;) | |
241 debug_only(_allow_allocation_count = 0;) | |
242 NOT_PRODUCT(_allow_safepoint_count = 0;) | |
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243 NOT_PRODUCT(_skip_gcalot = false;) |
0 | 244 _jvmti_env_iteration_count = 0; |
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245 set_allocated_bytes(0); |
0 | 246 _vm_operation_started_count = 0; |
247 _vm_operation_completed_count = 0; | |
248 _current_pending_monitor = NULL; | |
249 _current_pending_monitor_is_from_java = true; | |
250 _current_waiting_monitor = NULL; | |
251 _num_nested_signal = 0; | |
252 omFreeList = NULL ; | |
253 omFreeCount = 0 ; | |
254 omFreeProvision = 32 ; | |
1587 | 255 omInUseList = NULL ; |
256 omInUseCount = 0 ; | |
0 | 257 |
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258 #ifdef ASSERT |
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259 _visited_for_critical_count = false; |
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260 #endif |
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261 |
0 | 262 _SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true); |
263 _suspend_flags = 0; | |
264 | |
265 // thread-specific hashCode stream generator state - Marsaglia shift-xor form | |
266 _hashStateX = os::random() ; | |
267 _hashStateY = 842502087 ; | |
268 _hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ; | |
269 _hashStateW = 273326509 ; | |
270 | |
271 _OnTrap = 0 ; | |
272 _schedctl = NULL ; | |
273 _Stalled = 0 ; | |
274 _TypeTag = 0x2BAD ; | |
275 | |
276 // Many of the following fields are effectively final - immutable | |
277 // Note that nascent threads can't use the Native Monitor-Mutex | |
278 // construct until the _MutexEvent is initialized ... | |
279 // CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents | |
280 // we might instead use a stack of ParkEvents that we could provision on-demand. | |
281 // The stack would act as a cache to avoid calls to ParkEvent::Allocate() | |
282 // and ::Release() | |
283 _ParkEvent = ParkEvent::Allocate (this) ; | |
284 _SleepEvent = ParkEvent::Allocate (this) ; | |
285 _MutexEvent = ParkEvent::Allocate (this) ; | |
286 _MuxEvent = ParkEvent::Allocate (this) ; | |
287 | |
288 #ifdef CHECK_UNHANDLED_OOPS | |
289 if (CheckUnhandledOops) { | |
290 _unhandled_oops = new UnhandledOops(this); | |
291 } | |
292 #endif // CHECK_UNHANDLED_OOPS | |
293 #ifdef ASSERT | |
294 if (UseBiasedLocking) { | |
295 assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed"); | |
296 assert(this == _real_malloc_address || | |
297 this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment), | |
298 "bug in forced alignment of thread objects"); | |
299 } | |
300 #endif /* ASSERT */ | |
301 } | |
302 | |
303 void Thread::initialize_thread_local_storage() { | |
304 // Note: Make sure this method only calls | |
305 // non-blocking operations. Otherwise, it might not work | |
306 // with the thread-startup/safepoint interaction. | |
307 | |
308 // During Java thread startup, safepoint code should allow this | |
309 // method to complete because it may need to allocate memory to | |
310 // store information for the new thread. | |
311 | |
312 // initialize structure dependent on thread local storage | |
313 ThreadLocalStorage::set_thread(this); | |
314 } | |
315 | |
316 void Thread::record_stack_base_and_size() { | |
317 set_stack_base(os::current_stack_base()); | |
318 set_stack_size(os::current_stack_size()); | |
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319 if (is_Java_thread()) { |
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320 ((JavaThread*) this)->set_stack_overflow_limit(); |
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321 } |
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322 // CR 7190089: on Solaris, primordial thread's stack is adjusted |
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323 // in initialize_thread(). Without the adjustment, stack size is |
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324 // incorrect if stack is set to unlimited (ulimit -s unlimited). |
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325 // So far, only Solaris has real implementation of initialize_thread(). |
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326 // |
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327 // set up any platform-specific state. |
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328 os::initialize_thread(this); |
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329 |
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330 #if INCLUDE_NMT |
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331 // record thread's native stack, stack grows downward |
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332 address stack_low_addr = stack_base() - stack_size(); |
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333 MemTracker::record_thread_stack(stack_low_addr, stack_size(), this, |
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334 CURRENT_PC); |
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335 #endif // INCLUDE_NMT |
0 | 336 } |
337 | |
338 | |
339 Thread::~Thread() { | |
340 // Reclaim the objectmonitors from the omFreeList of the moribund thread. | |
341 ObjectSynchronizer::omFlush (this) ; | |
342 | |
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343 EVENT_THREAD_DESTRUCT(this); |
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344 |
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345 // stack_base can be NULL if the thread is never started or exited before |
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346 // record_stack_base_and_size called. Although, we would like to ensure |
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347 // that all started threads do call record_stack_base_and_size(), there is |
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348 // not proper way to enforce that. |
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349 #if INCLUDE_NMT |
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350 if (_stack_base != NULL) { |
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351 address low_stack_addr = stack_base() - stack_size(); |
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352 MemTracker::release_thread_stack(low_stack_addr, stack_size(), this); |
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353 #ifdef ASSERT |
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354 set_stack_base(NULL); |
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355 #endif |
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356 } |
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357 #endif // INCLUDE_NMT |
6197 | 358 |
0 | 359 // deallocate data structures |
360 delete resource_area(); | |
361 // since the handle marks are using the handle area, we have to deallocated the root | |
362 // handle mark before deallocating the thread's handle area, | |
363 assert(last_handle_mark() != NULL, "check we have an element"); | |
10135 | 364 delete last_handle_mark(); |
365 assert(last_handle_mark() == NULL, "check we have reached the end"); | |
0 | 366 |
367 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. | |
368 // We NULL out the fields for good hygiene. | |
369 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; | |
370 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; | |
371 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; | |
372 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; | |
373 | |
374 delete handle_area(); | |
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375 delete metadata_handles(); |
0 | 376 |
377 // osthread() can be NULL, if creation of thread failed. | |
378 if (osthread() != NULL) os::free_thread(osthread()); | |
379 | |
380 delete _SR_lock; | |
381 | |
382 // clear thread local storage if the Thread is deleting itself | |
383 if (this == Thread::current()) { | |
384 ThreadLocalStorage::set_thread(NULL); | |
385 } else { | |
386 // In the case where we're not the current thread, invalidate all the | |
387 // caches in case some code tries to get the current thread or the | |
388 // thread that was destroyed, and gets stale information. | |
389 ThreadLocalStorage::invalidate_all(); | |
390 } | |
391 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) | |
392 } | |
393 | |
394 // NOTE: dummy function for assertion purpose. | |
395 void Thread::run() { | |
396 ShouldNotReachHere(); | |
397 } | |
398 | |
399 #ifdef ASSERT | |
400 // Private method to check for dangling thread pointer | |
401 void check_for_dangling_thread_pointer(Thread *thread) { | |
402 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
403 "possibility of dangling Thread pointer"); | |
404 } | |
405 #endif | |
406 | |
407 | |
408 #ifndef PRODUCT | |
409 // Tracing method for basic thread operations | |
410 void Thread::trace(const char* msg, const Thread* const thread) { | |
411 if (!TraceThreadEvents) return; | |
412 ResourceMark rm; | |
413 ThreadCritical tc; | |
414 const char *name = "non-Java thread"; | |
415 int prio = -1; | |
416 if (thread->is_Java_thread() | |
417 && !thread->is_Compiler_thread()) { | |
418 // The Threads_lock must be held to get information about | |
419 // this thread but may not be in some situations when | |
420 // tracing thread events. | |
421 bool release_Threads_lock = false; | |
422 if (!Threads_lock->owned_by_self()) { | |
423 Threads_lock->lock(); | |
424 release_Threads_lock = true; | |
425 } | |
426 JavaThread* jt = (JavaThread *)thread; | |
427 name = (char *)jt->get_thread_name(); | |
428 oop thread_oop = jt->threadObj(); | |
429 if (thread_oop != NULL) { | |
430 prio = java_lang_Thread::priority(thread_oop); | |
431 } | |
432 if (release_Threads_lock) { | |
433 Threads_lock->unlock(); | |
434 } | |
435 } | |
436 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); | |
437 } | |
438 #endif | |
439 | |
440 | |
441 ThreadPriority Thread::get_priority(const Thread* const thread) { | |
442 trace("get priority", thread); | |
443 ThreadPriority priority; | |
444 // Can return an error! | |
445 (void)os::get_priority(thread, priority); | |
446 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); | |
447 return priority; | |
448 } | |
449 | |
450 void Thread::set_priority(Thread* thread, ThreadPriority priority) { | |
451 trace("set priority", thread); | |
452 debug_only(check_for_dangling_thread_pointer(thread);) | |
453 // Can return an error! | |
454 (void)os::set_priority(thread, priority); | |
455 } | |
456 | |
457 | |
458 void Thread::start(Thread* thread) { | |
459 trace("start", thread); | |
460 // Start is different from resume in that its safety is guaranteed by context or | |
461 // being called from a Java method synchronized on the Thread object. | |
462 if (!DisableStartThread) { | |
463 if (thread->is_Java_thread()) { | |
464 // Initialize the thread state to RUNNABLE before starting this thread. | |
465 // Can not set it after the thread started because we do not know the | |
466 // exact thread state at that time. It could be in MONITOR_WAIT or | |
467 // in SLEEPING or some other state. | |
468 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), | |
469 java_lang_Thread::RUNNABLE); | |
470 } | |
471 os::start_thread(thread); | |
472 } | |
473 } | |
474 | |
475 // Enqueue a VM_Operation to do the job for us - sometime later | |
476 void Thread::send_async_exception(oop java_thread, oop java_throwable) { | |
477 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); | |
478 VMThread::execute(vm_stop); | |
479 } | |
480 | |
481 | |
482 // | |
483 // Check if an external suspend request has completed (or has been | |
484 // cancelled). Returns true if the thread is externally suspended and | |
485 // false otherwise. | |
486 // | |
487 // The bits parameter returns information about the code path through | |
488 // the routine. Useful for debugging: | |
489 // | |
490 // set in is_ext_suspend_completed(): | |
491 // 0x00000001 - routine was entered | |
492 // 0x00000010 - routine return false at end | |
493 // 0x00000100 - thread exited (return false) | |
494 // 0x00000200 - suspend request cancelled (return false) | |
495 // 0x00000400 - thread suspended (return true) | |
496 // 0x00001000 - thread is in a suspend equivalent state (return true) | |
497 // 0x00002000 - thread is native and walkable (return true) | |
498 // 0x00004000 - thread is native_trans and walkable (needed retry) | |
499 // | |
500 // set in wait_for_ext_suspend_completion(): | |
501 // 0x00010000 - routine was entered | |
502 // 0x00020000 - suspend request cancelled before loop (return false) | |
503 // 0x00040000 - thread suspended before loop (return true) | |
504 // 0x00080000 - suspend request cancelled in loop (return false) | |
505 // 0x00100000 - thread suspended in loop (return true) | |
506 // 0x00200000 - suspend not completed during retry loop (return false) | |
507 // | |
508 | |
509 // Helper class for tracing suspend wait debug bits. | |
510 // | |
511 // 0x00000100 indicates that the target thread exited before it could | |
512 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and | |
513 // 0x00080000 each indicate a cancelled suspend request so they don't | |
514 // count as wait failures either. | |
515 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) | |
516 | |
517 class TraceSuspendDebugBits : public StackObj { | |
518 private: | |
519 JavaThread * jt; | |
520 bool is_wait; | |
521 bool called_by_wait; // meaningful when !is_wait | |
522 uint32_t * bits; | |
523 | |
524 public: | |
525 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, | |
526 uint32_t *_bits) { | |
527 jt = _jt; | |
528 is_wait = _is_wait; | |
529 called_by_wait = _called_by_wait; | |
530 bits = _bits; | |
531 } | |
532 | |
533 ~TraceSuspendDebugBits() { | |
534 if (!is_wait) { | |
535 #if 1 | |
536 // By default, don't trace bits for is_ext_suspend_completed() calls. | |
537 // That trace is very chatty. | |
538 return; | |
539 #else | |
540 if (!called_by_wait) { | |
541 // If tracing for is_ext_suspend_completed() is enabled, then only | |
542 // trace calls to it from wait_for_ext_suspend_completion() | |
543 return; | |
544 } | |
545 #endif | |
546 } | |
547 | |
548 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { | |
549 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { | |
550 MutexLocker ml(Threads_lock); // needed for get_thread_name() | |
551 ResourceMark rm; | |
552 | |
553 tty->print_cr( | |
554 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", | |
555 jt->get_thread_name(), *bits); | |
556 | |
557 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); | |
558 } | |
559 } | |
560 } | |
561 }; | |
562 #undef DEBUG_FALSE_BITS | |
563 | |
564 | |
565 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { | |
566 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); | |
567 | |
568 bool did_trans_retry = false; // only do thread_in_native_trans retry once | |
569 bool do_trans_retry; // flag to force the retry | |
570 | |
571 *bits |= 0x00000001; | |
572 | |
573 do { | |
574 do_trans_retry = false; | |
575 | |
576 if (is_exiting()) { | |
577 // Thread is in the process of exiting. This is always checked | |
578 // first to reduce the risk of dereferencing a freed JavaThread. | |
579 *bits |= 0x00000100; | |
580 return false; | |
581 } | |
582 | |
583 if (!is_external_suspend()) { | |
584 // Suspend request is cancelled. This is always checked before | |
585 // is_ext_suspended() to reduce the risk of a rogue resume | |
586 // confusing the thread that made the suspend request. | |
587 *bits |= 0x00000200; | |
588 return false; | |
589 } | |
590 | |
591 if (is_ext_suspended()) { | |
592 // thread is suspended | |
593 *bits |= 0x00000400; | |
594 return true; | |
595 } | |
596 | |
597 // Now that we no longer do hard suspends of threads running | |
598 // native code, the target thread can be changing thread state | |
599 // while we are in this routine: | |
600 // | |
601 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked | |
602 // | |
603 // We save a copy of the thread state as observed at this moment | |
604 // and make our decision about suspend completeness based on the | |
605 // copy. This closes the race where the thread state is seen as | |
606 // _thread_in_native_trans in the if-thread_blocked check, but is | |
607 // seen as _thread_blocked in if-thread_in_native_trans check. | |
608 JavaThreadState save_state = thread_state(); | |
609 | |
610 if (save_state == _thread_blocked && is_suspend_equivalent()) { | |
611 // If the thread's state is _thread_blocked and this blocking | |
612 // condition is known to be equivalent to a suspend, then we can | |
613 // consider the thread to be externally suspended. This means that | |
614 // the code that sets _thread_blocked has been modified to do | |
615 // self-suspension if the blocking condition releases. We also | |
616 // used to check for CONDVAR_WAIT here, but that is now covered by | |
617 // the _thread_blocked with self-suspension check. | |
618 // | |
619 // Return true since we wouldn't be here unless there was still an | |
620 // external suspend request. | |
621 *bits |= 0x00001000; | |
622 return true; | |
623 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) { | |
624 // Threads running native code will self-suspend on native==>VM/Java | |
625 // transitions. If its stack is walkable (should always be the case | |
626 // unless this function is called before the actual java_suspend() | |
627 // call), then the wait is done. | |
628 *bits |= 0x00002000; | |
629 return true; | |
630 } else if (!called_by_wait && !did_trans_retry && | |
631 save_state == _thread_in_native_trans && | |
632 frame_anchor()->walkable()) { | |
633 // The thread is transitioning from thread_in_native to another | |
634 // thread state. check_safepoint_and_suspend_for_native_trans() | |
635 // will force the thread to self-suspend. If it hasn't gotten | |
636 // there yet we may have caught the thread in-between the native | |
637 // code check above and the self-suspend. Lucky us. If we were | |
638 // called by wait_for_ext_suspend_completion(), then it | |
639 // will be doing the retries so we don't have to. | |
640 // | |
641 // Since we use the saved thread state in the if-statement above, | |
642 // there is a chance that the thread has already transitioned to | |
643 // _thread_blocked by the time we get here. In that case, we will | |
644 // make a single unnecessary pass through the logic below. This | |
645 // doesn't hurt anything since we still do the trans retry. | |
646 | |
647 *bits |= 0x00004000; | |
648 | |
649 // Once the thread leaves thread_in_native_trans for another | |
650 // thread state, we break out of this retry loop. We shouldn't | |
651 // need this flag to prevent us from getting back here, but | |
652 // sometimes paranoia is good. | |
653 did_trans_retry = true; | |
654 | |
655 // We wait for the thread to transition to a more usable state. | |
656 for (int i = 1; i <= SuspendRetryCount; i++) { | |
657 // We used to do an "os::yield_all(i)" call here with the intention | |
658 // that yielding would increase on each retry. However, the parameter | |
659 // is ignored on Linux which means the yield didn't scale up. Waiting | |
660 // on the SR_lock below provides a much more predictable scale up for | |
661 // the delay. It also provides a simple/direct point to check for any | |
662 // safepoint requests from the VMThread | |
663 | |
664 // temporarily drops SR_lock while doing wait with safepoint check | |
665 // (if we're a JavaThread - the WatcherThread can also call this) | |
666 // and increase delay with each retry | |
667 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
668 | |
669 // check the actual thread state instead of what we saved above | |
670 if (thread_state() != _thread_in_native_trans) { | |
671 // the thread has transitioned to another thread state so | |
672 // try all the checks (except this one) one more time. | |
673 do_trans_retry = true; | |
674 break; | |
675 } | |
676 } // end retry loop | |
677 | |
678 | |
679 } | |
680 } while (do_trans_retry); | |
681 | |
682 *bits |= 0x00000010; | |
683 return false; | |
684 } | |
685 | |
686 // | |
687 // Wait for an external suspend request to complete (or be cancelled). | |
688 // Returns true if the thread is externally suspended and false otherwise. | |
689 // | |
690 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, | |
691 uint32_t *bits) { | |
692 TraceSuspendDebugBits tsdb(this, true /* is_wait */, | |
693 false /* !called_by_wait */, bits); | |
694 | |
695 // local flag copies to minimize SR_lock hold time | |
696 bool is_suspended; | |
697 bool pending; | |
698 uint32_t reset_bits; | |
699 | |
700 // set a marker so is_ext_suspend_completed() knows we are the caller | |
701 *bits |= 0x00010000; | |
702 | |
703 // We use reset_bits to reinitialize the bits value at the top of | |
704 // each retry loop. This allows the caller to make use of any | |
705 // unused bits for their own marking purposes. | |
706 reset_bits = *bits; | |
707 | |
708 { | |
709 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
710 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
711 delay, bits); | |
712 pending = is_external_suspend(); | |
713 } | |
714 // must release SR_lock to allow suspension to complete | |
715 | |
716 if (!pending) { | |
717 // A cancelled suspend request is the only false return from | |
718 // is_ext_suspend_completed() that keeps us from entering the | |
719 // retry loop. | |
720 *bits |= 0x00020000; | |
721 return false; | |
722 } | |
723 | |
724 if (is_suspended) { | |
725 *bits |= 0x00040000; | |
726 return true; | |
727 } | |
728 | |
729 for (int i = 1; i <= retries; i++) { | |
730 *bits = reset_bits; // reinit to only track last retry | |
731 | |
732 // We used to do an "os::yield_all(i)" call here with the intention | |
733 // that yielding would increase on each retry. However, the parameter | |
734 // is ignored on Linux which means the yield didn't scale up. Waiting | |
735 // on the SR_lock below provides a much more predictable scale up for | |
736 // the delay. It also provides a simple/direct point to check for any | |
737 // safepoint requests from the VMThread | |
738 | |
739 { | |
740 MutexLocker ml(SR_lock()); | |
741 // wait with safepoint check (if we're a JavaThread - the WatcherThread | |
742 // can also call this) and increase delay with each retry | |
743 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
744 | |
745 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
746 delay, bits); | |
747 | |
748 // It is possible for the external suspend request to be cancelled | |
749 // (by a resume) before the actual suspend operation is completed. | |
750 // Refresh our local copy to see if we still need to wait. | |
751 pending = is_external_suspend(); | |
752 } | |
753 | |
754 if (!pending) { | |
755 // A cancelled suspend request is the only false return from | |
756 // is_ext_suspend_completed() that keeps us from staying in the | |
757 // retry loop. | |
758 *bits |= 0x00080000; | |
759 return false; | |
760 } | |
761 | |
762 if (is_suspended) { | |
763 *bits |= 0x00100000; | |
764 return true; | |
765 } | |
766 } // end retry loop | |
767 | |
768 // thread did not suspend after all our retries | |
769 *bits |= 0x00200000; | |
770 return false; | |
771 } | |
772 | |
773 #ifndef PRODUCT | |
774 void JavaThread::record_jump(address target, address instr, const char* file, int line) { | |
775 | |
776 // This should not need to be atomic as the only way for simultaneous | |
777 // updates is via interrupts. Even then this should be rare or non-existant | |
778 // and we don't care that much anyway. | |
779 | |
780 int index = _jmp_ring_index; | |
781 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); | |
782 _jmp_ring[index]._target = (intptr_t) target; | |
783 _jmp_ring[index]._instruction = (intptr_t) instr; | |
784 _jmp_ring[index]._file = file; | |
785 _jmp_ring[index]._line = line; | |
786 } | |
787 #endif /* PRODUCT */ | |
788 | |
789 // Called by flat profiler | |
790 // Callers have already called wait_for_ext_suspend_completion | |
791 // The assertion for that is currently too complex to put here: | |
792 bool JavaThread::profile_last_Java_frame(frame* _fr) { | |
793 bool gotframe = false; | |
794 // self suspension saves needed state. | |
795 if (has_last_Java_frame() && _anchor.walkable()) { | |
796 *_fr = pd_last_frame(); | |
797 gotframe = true; | |
798 } | |
799 return gotframe; | |
800 } | |
801 | |
802 void Thread::interrupt(Thread* thread) { | |
803 trace("interrupt", thread); | |
804 debug_only(check_for_dangling_thread_pointer(thread);) | |
805 os::interrupt(thread); | |
806 } | |
807 | |
808 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { | |
809 trace("is_interrupted", thread); | |
810 debug_only(check_for_dangling_thread_pointer(thread);) | |
811 // Note: If clear_interrupted==false, this simply fetches and | |
812 // returns the value of the field osthread()->interrupted(). | |
813 return os::is_interrupted(thread, clear_interrupted); | |
814 } | |
815 | |
816 | |
817 // GC Support | |
818 bool Thread::claim_oops_do_par_case(int strong_roots_parity) { | |
819 jint thread_parity = _oops_do_parity; | |
820 if (thread_parity != strong_roots_parity) { | |
821 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); | |
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822 if (res == thread_parity) { |
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823 return true; |
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824 } else { |
0 | 825 guarantee(res == strong_roots_parity, "Or else what?"); |
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826 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
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827 "Should only fail when parallel."); |
0 | 828 return false; |
829 } | |
830 } | |
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831 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
0 | 832 "Should only fail when parallel."); |
833 return false; | |
834 } | |
835 | |
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836 void Thread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 837 active_handles()->oops_do(f); |
838 // Do oop for ThreadShadow | |
839 f->do_oop((oop*)&_pending_exception); | |
840 handle_area()->oops_do(f); | |
841 } | |
842 | |
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843 void Thread::nmethods_do(CodeBlobClosure* cf) { |
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844 // no nmethods in a generic thread... |
0 | 845 } |
846 | |
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847 void Thread::metadata_do(void f(Metadata*)) { |
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848 if (metadata_handles() != NULL) { |
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849 for (int i = 0; i< metadata_handles()->length(); i++) { |
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850 f(metadata_handles()->at(i)); |
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851 } |
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852 } |
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853 } |
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854 |
0 | 855 void Thread::print_on(outputStream* st) const { |
856 // get_priority assumes osthread initialized | |
857 if (osthread() != NULL) { | |
6766 | 858 int os_prio; |
859 if (os::get_native_priority(this, &os_prio) == OS_OK) { | |
860 st->print("os_prio=%d ", os_prio); | |
861 } | |
862 st->print("tid=" INTPTR_FORMAT " ", this); | |
0 | 863 osthread()->print_on(st); |
864 } | |
865 debug_only(if (WizardMode) print_owned_locks_on(st);) | |
866 } | |
867 | |
868 // Thread::print_on_error() is called by fatal error handler. Don't use | |
869 // any lock or allocate memory. | |
870 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { | |
871 if (is_VM_thread()) st->print("VMThread"); | |
872 else if (is_Compiler_thread()) st->print("CompilerThread"); | |
873 else if (is_Java_thread()) st->print("JavaThread"); | |
874 else if (is_GC_task_thread()) st->print("GCTaskThread"); | |
875 else if (is_Watcher_thread()) st->print("WatcherThread"); | |
876 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); | |
877 else st->print("Thread"); | |
878 | |
879 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", | |
880 _stack_base - _stack_size, _stack_base); | |
881 | |
882 if (osthread()) { | |
883 st->print(" [id=%d]", osthread()->thread_id()); | |
884 } | |
885 } | |
886 | |
887 #ifdef ASSERT | |
888 void Thread::print_owned_locks_on(outputStream* st) const { | |
889 Monitor *cur = _owned_locks; | |
890 if (cur == NULL) { | |
891 st->print(" (no locks) "); | |
892 } else { | |
893 st->print_cr(" Locks owned:"); | |
894 while(cur) { | |
895 cur->print_on(st); | |
896 cur = cur->next(); | |
897 } | |
898 } | |
899 } | |
900 | |
901 static int ref_use_count = 0; | |
902 | |
903 bool Thread::owns_locks_but_compiled_lock() const { | |
904 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
905 if (cur != Compile_lock) return true; | |
906 } | |
907 return false; | |
908 } | |
909 | |
910 | |
911 #endif | |
912 | |
913 #ifndef PRODUCT | |
914 | |
915 // The flag: potential_vm_operation notifies if this particular safepoint state could potential | |
916 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that | |
917 // no threads which allow_vm_block's are held | |
918 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { | |
919 // Check if current thread is allowed to block at a safepoint | |
920 if (!(_allow_safepoint_count == 0)) | |
921 fatal("Possible safepoint reached by thread that does not allow it"); | |
922 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { | |
923 fatal("LEAF method calling lock?"); | |
924 } | |
925 | |
926 #ifdef ASSERT | |
927 if (potential_vm_operation && is_Java_thread() | |
928 && !Universe::is_bootstrapping()) { | |
929 // Make sure we do not hold any locks that the VM thread also uses. | |
930 // This could potentially lead to deadlocks | |
931 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
932 // Threads_lock is special, since the safepoint synchronization will not start before this is | |
933 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, | |
934 // since it is used to transfer control between JavaThreads and the VMThread | |
935 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! | |
936 if ( (cur->allow_vm_block() && | |
937 cur != Threads_lock && | |
938 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation | |
939 cur != VMOperationRequest_lock && | |
940 cur != VMOperationQueue_lock) || | |
941 cur->rank() == Mutex::special) { | |
942 warning("Thread holding lock at safepoint that vm can block on: %s", cur->name()); | |
943 } | |
944 } | |
945 } | |
946 | |
947 if (GCALotAtAllSafepoints) { | |
948 // We could enter a safepoint here and thus have a gc | |
949 InterfaceSupport::check_gc_alot(); | |
950 } | |
951 #endif | |
952 } | |
953 #endif | |
954 | |
955 bool Thread::is_in_stack(address adr) const { | |
956 assert(Thread::current() == this, "is_in_stack can only be called from current thread"); | |
957 address end = os::current_stack_pointer(); | |
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958 // Allow non Java threads to call this without stack_base |
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959 if (_stack_base == NULL) return true; |
0 | 960 if (stack_base() >= adr && adr >= end) return true; |
961 | |
962 return false; | |
963 } | |
964 | |
965 | |
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966 bool Thread::is_in_usable_stack(address adr) const { |
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967 size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0; |
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968 size_t usable_stack_size = _stack_size - stack_guard_size; |
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969 |
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970 return ((adr < stack_base()) && (adr >= stack_base() - usable_stack_size)); |
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971 } |
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972 |
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973 |
0 | 974 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter |
975 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being | |
976 // used for compilation in the future. If that change is made, the need for these methods | |
977 // should be revisited, and they should be removed if possible. | |
978 | |
979 bool Thread::is_lock_owned(address adr) const { | |
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980 return on_local_stack(adr); |
0 | 981 } |
982 | |
983 bool Thread::set_as_starting_thread() { | |
984 // NOTE: this must be called inside the main thread. | |
985 return os::create_main_thread((JavaThread*)this); | |
986 } | |
987 | |
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988 static void initialize_class(Symbol* class_name, TRAPS) { |
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989 Klass* klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
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990 InstanceKlass::cast(klass)->initialize(CHECK); |
0 | 991 } |
992 | |
993 | |
994 // Creates the initial ThreadGroup | |
995 static Handle create_initial_thread_group(TRAPS) { | |
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996 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
0 | 997 instanceKlassHandle klass (THREAD, k); |
998 | |
999 Handle system_instance = klass->allocate_instance_handle(CHECK_NH); | |
1000 { | |
1001 JavaValue result(T_VOID); | |
1002 JavaCalls::call_special(&result, | |
1003 system_instance, | |
1004 klass, | |
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1005 vmSymbols::object_initializer_name(), |
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1006 vmSymbols::void_method_signature(), |
0 | 1007 CHECK_NH); |
1008 } | |
1009 Universe::set_system_thread_group(system_instance()); | |
1010 | |
1011 Handle main_instance = klass->allocate_instance_handle(CHECK_NH); | |
1012 { | |
1013 JavaValue result(T_VOID); | |
1014 Handle string = java_lang_String::create_from_str("main", CHECK_NH); | |
1015 JavaCalls::call_special(&result, | |
1016 main_instance, | |
1017 klass, | |
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1018 vmSymbols::object_initializer_name(), |
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1019 vmSymbols::threadgroup_string_void_signature(), |
0 | 1020 system_instance, |
1021 string, | |
1022 CHECK_NH); | |
1023 } | |
1024 return main_instance; | |
1025 } | |
1026 | |
1027 // Creates the initial Thread | |
1028 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { | |
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1029 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
0 | 1030 instanceKlassHandle klass (THREAD, k); |
1031 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); | |
1032 | |
1033 java_lang_Thread::set_thread(thread_oop(), thread); | |
1034 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1035 thread->set_threadObj(thread_oop()); | |
1036 | |
1037 Handle string = java_lang_String::create_from_str("main", CHECK_NULL); | |
1038 | |
1039 JavaValue result(T_VOID); | |
1040 JavaCalls::call_special(&result, thread_oop, | |
1041 klass, | |
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1042 vmSymbols::object_initializer_name(), |
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1043 vmSymbols::threadgroup_string_void_signature(), |
0 | 1044 thread_group, |
1045 string, | |
1046 CHECK_NULL); | |
1047 return thread_oop(); | |
1048 } | |
1049 | |
1050 static void call_initializeSystemClass(TRAPS) { | |
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1051 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1052 instanceKlassHandle klass (THREAD, k); |
1053 | |
1054 JavaValue result(T_VOID); | |
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1055 JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
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1056 vmSymbols::void_method_signature(), CHECK); |
0 | 1057 } |
1058 | |
6181 | 1059 char java_runtime_name[128] = ""; |
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1060 char java_runtime_version[128] = ""; |
6181 | 1061 |
1062 // extract the JRE name from sun.misc.Version.java_runtime_name | |
1063 static const char* get_java_runtime_name(TRAPS) { | |
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1064 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
6181 | 1065 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
1066 fieldDescriptor fd; | |
1067 bool found = k != NULL && | |
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1068 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_name_name(), |
6181 | 1069 vmSymbols::string_signature(), &fd); |
1070 if (found) { | |
1071 oop name_oop = k->java_mirror()->obj_field(fd.offset()); | |
1072 if (name_oop == NULL) | |
1073 return NULL; | |
1074 const char* name = java_lang_String::as_utf8_string(name_oop, | |
1075 java_runtime_name, | |
1076 sizeof(java_runtime_name)); | |
1077 return name; | |
1078 } else { | |
1079 return NULL; | |
1080 } | |
1081 } | |
1082 | |
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1083 // extract the JRE version from sun.misc.Version.java_runtime_version |
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1084 static const char* get_java_runtime_version(TRAPS) { |
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1085 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
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1086 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
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1087 fieldDescriptor fd; |
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1088 bool found = k != NULL && |
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1089 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_version_name(), |
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1090 vmSymbols::string_signature(), &fd); |
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1091 if (found) { |
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1092 oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
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1093 if (name_oop == NULL) |
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1094 return NULL; |
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1095 const char* name = java_lang_String::as_utf8_string(name_oop, |
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1096 java_runtime_version, |
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1097 sizeof(java_runtime_version)); |
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1098 return name; |
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1099 } else { |
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1100 return NULL; |
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1101 } |
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1102 } |
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1103 |
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1104 // General purpose hook into Java code, run once when the VM is initialized. |
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1105 // The Java library method itself may be changed independently from the VM. |
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1106 static void call_postVMInitHook(TRAPS) { |
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1107 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_PostVMInitHook(), THREAD); |
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1108 instanceKlassHandle klass (THREAD, k); |
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1109 if (klass.not_null()) { |
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1110 JavaValue result(T_VOID); |
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1111 JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
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1112 vmSymbols::void_method_signature(), |
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1113 CHECK); |
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1114 } |
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1115 } |
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1116 |
0 | 1117 static void reset_vm_info_property(TRAPS) { |
1118 // the vm info string | |
1119 ResourceMark rm(THREAD); | |
1120 const char *vm_info = VM_Version::vm_info_string(); | |
1121 | |
1122 // java.lang.System class | |
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1123 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1124 instanceKlassHandle klass (THREAD, k); |
1125 | |
1126 // setProperty arguments | |
1127 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); | |
1128 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); | |
1129 | |
1130 // return value | |
1131 JavaValue r(T_OBJECT); | |
1132 | |
1133 // public static String setProperty(String key, String value); | |
1134 JavaCalls::call_static(&r, | |
1135 klass, | |
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1136 vmSymbols::setProperty_name(), |
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1137 vmSymbols::string_string_string_signature(), |
0 | 1138 key_str, |
1139 value_str, | |
1140 CHECK); | |
1141 } | |
1142 | |
1143 | |
1144 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { | |
1145 assert(thread_group.not_null(), "thread group should be specified"); | |
1146 assert(threadObj() == NULL, "should only create Java thread object once"); | |
1147 | |
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1148 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 1149 instanceKlassHandle klass (THREAD, k); |
1150 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
1151 | |
1152 java_lang_Thread::set_thread(thread_oop(), this); | |
1153 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1154 set_threadObj(thread_oop()); | |
1155 | |
1156 JavaValue result(T_VOID); | |
1157 if (thread_name != NULL) { | |
1158 Handle name = java_lang_String::create_from_str(thread_name, CHECK); | |
1159 // Thread gets assigned specified name and null target | |
1160 JavaCalls::call_special(&result, | |
1161 thread_oop, | |
1162 klass, | |
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1163 vmSymbols::object_initializer_name(), |
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1164 vmSymbols::threadgroup_string_void_signature(), |
0 | 1165 thread_group, // Argument 1 |
1166 name, // Argument 2 | |
1167 THREAD); | |
1168 } else { | |
1169 // Thread gets assigned name "Thread-nnn" and null target | |
1170 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) | |
1171 JavaCalls::call_special(&result, | |
1172 thread_oop, | |
1173 klass, | |
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1174 vmSymbols::object_initializer_name(), |
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1175 vmSymbols::threadgroup_runnable_void_signature(), |
0 | 1176 thread_group, // Argument 1 |
1177 Handle(), // Argument 2 | |
1178 THREAD); | |
1179 } | |
1180 | |
1181 | |
1182 if (daemon) { | |
1183 java_lang_Thread::set_daemon(thread_oop()); | |
1184 } | |
1185 | |
1186 if (HAS_PENDING_EXCEPTION) { | |
1187 return; | |
1188 } | |
1189 | |
1142 | 1190 KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
0 | 1191 Handle threadObj(this, this->threadObj()); |
1192 | |
1193 JavaCalls::call_special(&result, | |
1194 thread_group, | |
1195 group, | |
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1196 vmSymbols::add_method_name(), |
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1197 vmSymbols::thread_void_signature(), |
0 | 1198 threadObj, // Arg 1 |
1199 THREAD); | |
1200 | |
1201 | |
1202 } | |
1203 | |
1204 // NamedThread -- non-JavaThread subclasses with multiple | |
1205 // uniquely named instances should derive from this. | |
1206 NamedThread::NamedThread() : Thread() { | |
1207 _name = NULL; | |
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1208 _processed_thread = NULL; |
0 | 1209 } |
1210 | |
1211 NamedThread::~NamedThread() { | |
1212 if (_name != NULL) { | |
6197 | 1213 FREE_C_HEAP_ARRAY(char, _name, mtThread); |
0 | 1214 _name = NULL; |
1215 } | |
1216 } | |
1217 | |
1218 void NamedThread::set_name(const char* format, ...) { | |
1219 guarantee(_name == NULL, "Only get to set name once."); | |
6197 | 1220 _name = NEW_C_HEAP_ARRAY(char, max_name_len, mtThread); |
0 | 1221 guarantee(_name != NULL, "alloc failure"); |
1222 va_list ap; | |
1223 va_start(ap, format); | |
1224 jio_vsnprintf(_name, max_name_len, format, ap); | |
1225 va_end(ap); | |
1226 } | |
1227 | |
1228 // ======= WatcherThread ======== | |
1229 | |
1230 // The watcher thread exists to simulate timer interrupts. It should | |
1231 // be replaced by an abstraction over whatever native support for | |
1232 // timer interrupts exists on the platform. | |
1233 | |
1234 WatcherThread* WatcherThread::_watcher_thread = NULL; | |
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1235 bool WatcherThread::_startable = false; |
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1236 volatile bool WatcherThread::_should_terminate = false; |
0 | 1237 |
11151 | 1238 WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) { |
0 | 1239 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); |
1240 if (os::create_thread(this, os::watcher_thread)) { | |
1241 _watcher_thread = this; | |
1242 | |
1243 // Set the watcher thread to the highest OS priority which should not be | |
1244 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY | |
1245 // is created. The only normal thread using this priority is the reference | |
1246 // handler thread, which runs for very short intervals only. | |
1247 // If the VMThread's priority is not lower than the WatcherThread profiling | |
1248 // will be inaccurate. | |
1249 os::set_priority(this, MaxPriority); | |
1250 if (!DisableStartThread) { | |
1251 os::start_thread(this); | |
1252 } | |
1253 } | |
1254 } | |
1255 | |
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1256 int WatcherThread::sleep() const { |
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1257 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1258 |
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1259 // remaining will be zero if there are no tasks, |
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1260 // causing the WatcherThread to sleep until a task is |
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1261 // enrolled |
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1262 int remaining = PeriodicTask::time_to_wait(); |
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1263 int time_slept = 0; |
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1264 |
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1265 // we expect this to timeout - we only ever get unparked when |
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1266 // we should terminate or when a new task has been enrolled |
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1267 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
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1268 |
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1269 jlong time_before_loop = os::javaTimeNanos(); |
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1270 |
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1271 for (;;) { |
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1272 bool timedout = PeriodicTask_lock->wait(Mutex::_no_safepoint_check_flag, remaining); |
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1273 jlong now = os::javaTimeNanos(); |
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1274 |
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1275 if (remaining == 0) { |
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1276 // if we didn't have any tasks we could have waited for a long time |
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1277 // consider the time_slept zero and reset time_before_loop |
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1278 time_slept = 0; |
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1279 time_before_loop = now; |
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1280 } else { |
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1281 // need to recalulate since we might have new tasks in _tasks |
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1282 time_slept = (int) ((now - time_before_loop) / 1000000); |
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1283 } |
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1284 |
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1285 // Change to task list or spurious wakeup of some kind |
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1286 if (timedout || _should_terminate) { |
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1287 break; |
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1288 } |
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1289 |
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1290 remaining = PeriodicTask::time_to_wait(); |
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1291 if (remaining == 0) { |
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1292 // Last task was just disenrolled so loop around and wait until |
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1293 // another task gets enrolled |
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1294 continue; |
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1295 } |
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1296 |
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1297 remaining -= time_slept; |
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1298 if (remaining <= 0) |
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1299 break; |
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1300 } |
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1301 |
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1302 return time_slept; |
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1303 } |
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1304 |
0 | 1305 void WatcherThread::run() { |
1306 assert(this == watcher_thread(), "just checking"); | |
1307 | |
1308 this->record_stack_base_and_size(); | |
1309 this->initialize_thread_local_storage(); | |
1310 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1311 while(!_should_terminate) { | |
1312 assert(watcher_thread() == Thread::current(), "thread consistency check"); | |
1313 assert(watcher_thread() == this, "thread consistency check"); | |
1314 | |
1315 // Calculate how long it'll be until the next PeriodicTask work | |
1316 // should be done, and sleep that amount of time. | |
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1317 int time_waited = sleep(); |
0 | 1318 |
1319 if (is_error_reported()) { | |
1320 // A fatal error has happened, the error handler(VMError::report_and_die) | |
1321 // should abort JVM after creating an error log file. However in some | |
1322 // rare cases, the error handler itself might deadlock. Here we try to | |
1323 // kill JVM if the fatal error handler fails to abort in 2 minutes. | |
1324 // | |
1325 // This code is in WatcherThread because WatcherThread wakes up | |
1326 // periodically so the fatal error handler doesn't need to do anything; | |
1327 // also because the WatcherThread is less likely to crash than other | |
1328 // threads. | |
1329 | |
1330 for (;;) { | |
1331 if (!ShowMessageBoxOnError | |
1332 && (OnError == NULL || OnError[0] == '\0') | |
1333 && Arguments::abort_hook() == NULL) { | |
1334 os::sleep(this, 2 * 60 * 1000, false); | |
1335 fdStream err(defaultStream::output_fd()); | |
1336 err.print_raw_cr("# [ timer expired, abort... ]"); | |
1337 // skip atexit/vm_exit/vm_abort hooks | |
1338 os::die(); | |
1339 } | |
1340 | |
1341 // Wake up 5 seconds later, the fatal handler may reset OnError or | |
1342 // ShowMessageBoxOnError when it is ready to abort. | |
1343 os::sleep(this, 5 * 1000, false); | |
1344 } | |
1345 } | |
1346 | |
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1347 PeriodicTask::real_time_tick(time_waited); |
0 | 1348 } |
1349 | |
1350 // Signal that it is terminated | |
1351 { | |
1352 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); | |
1353 _watcher_thread = NULL; | |
1354 Terminator_lock->notify(); | |
1355 } | |
1356 | |
1357 // Thread destructor usually does this.. | |
1358 ThreadLocalStorage::set_thread(NULL); | |
1359 } | |
1360 | |
1361 void WatcherThread::start() { | |
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1362 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1363 |
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1364 if (watcher_thread() == NULL && _startable) { |
0 | 1365 _should_terminate = false; |
1366 // Create the single instance of WatcherThread | |
1367 new WatcherThread(); | |
1368 } | |
1369 } | |
1370 | |
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1371 void WatcherThread::make_startable() { |
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1372 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1373 _startable = true; |
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1374 } |
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1375 |
0 | 1376 void WatcherThread::stop() { |
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1377 { |
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1378 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1379 _should_terminate = true; |
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1380 OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
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1381 |
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1382 WatcherThread* watcher = watcher_thread(); |
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1383 if (watcher != NULL) |
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1384 watcher->unpark(); |
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1385 } |
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1386 |
0 | 1387 // it is ok to take late safepoints here, if needed |
1388 MutexLocker mu(Terminator_lock); | |
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1389 |
0 | 1390 while(watcher_thread() != NULL) { |
1391 // This wait should make safepoint checks, wait without a timeout, | |
1392 // and wait as a suspend-equivalent condition. | |
1393 // | |
1394 // Note: If the FlatProfiler is running, then this thread is waiting | |
1395 // for the WatcherThread to terminate and the WatcherThread, via the | |
1396 // FlatProfiler task, is waiting for the external suspend request on | |
1397 // this thread to complete. wait_for_ext_suspend_completion() will | |
1398 // eventually timeout, but that takes time. Making this wait a | |
1399 // suspend-equivalent condition solves that timeout problem. | |
1400 // | |
1401 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
1402 Mutex::_as_suspend_equivalent_flag); | |
1403 } | |
1404 } | |
1405 | |
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1406 void WatcherThread::unpark() { |
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1407 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1408 PeriodicTask_lock->notify(); |
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1409 } |
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1410 |
0 | 1411 void WatcherThread::print_on(outputStream* st) const { |
1412 st->print("\"%s\" ", name()); | |
1413 Thread::print_on(st); | |
1414 st->cr(); | |
1415 } | |
1416 | |
1417 // ======= JavaThread ======== | |
1418 | |
1419 // A JavaThread is a normal Java thread | |
1420 | |
1421 void JavaThread::initialize() { | |
1422 // Initialize fields | |
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1423 |
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1424 // Set the claimed par_id to UINT_MAX (ie not claiming any par_ids) |
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1425 set_claimed_par_id(UINT_MAX); |
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1426 |
0 | 1427 set_saved_exception_pc(NULL); |
1428 set_threadObj(NULL); | |
1429 _anchor.clear(); | |
1430 set_entry_point(NULL); | |
1431 set_jni_functions(jni_functions()); | |
1432 set_callee_target(NULL); | |
1433 set_vm_result(NULL); | |
1434 set_vm_result_2(NULL); | |
1435 set_vframe_array_head(NULL); | |
1436 set_vframe_array_last(NULL); | |
1437 set_deferred_locals(NULL); | |
1438 set_deopt_mark(NULL); | |
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1439 set_deopt_nmethod(NULL); |
0 | 1440 clear_must_deopt_id(); |
1441 set_monitor_chunks(NULL); | |
1442 set_next(NULL); | |
1443 set_thread_state(_thread_new); | |
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1444 #if INCLUDE_NMT |
6197 | 1445 set_recorder(NULL); |
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1446 #endif |
0 | 1447 _terminated = _not_terminated; |
1448 _privileged_stack_top = NULL; | |
1449 _array_for_gc = NULL; | |
1450 _suspend_equivalent = false; | |
1451 _in_deopt_handler = 0; | |
1452 _doing_unsafe_access = false; | |
1453 _stack_guard_state = stack_guard_unused; | |
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1454 (void)const_cast<oop&>(_exception_oop = NULL); |
0 | 1455 _exception_pc = 0; |
1456 _exception_handler_pc = 0; | |
1903 | 1457 _is_method_handle_return = 0; |
0 | 1458 _jvmti_thread_state= NULL; |
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1459 _should_post_on_exceptions_flag = JNI_FALSE; |
0 | 1460 _jvmti_get_loaded_classes_closure = NULL; |
1461 _interp_only_mode = 0; | |
1462 _special_runtime_exit_condition = _no_async_condition; | |
1463 _pending_async_exception = NULL; | |
1464 _thread_stat = NULL; | |
1465 _thread_stat = new ThreadStatistics(); | |
1466 _blocked_on_compilation = false; | |
1467 _jni_active_critical = 0; | |
1468 _do_not_unlock_if_synchronized = false; | |
1469 _cached_monitor_info = NULL; | |
1470 _parker = Parker::Allocate(this) ; | |
1471 | |
1472 #ifndef PRODUCT | |
1473 _jmp_ring_index = 0; | |
1474 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { | |
1475 record_jump(NULL, NULL, NULL, 0); | |
1476 } | |
1477 #endif /* PRODUCT */ | |
1478 | |
1479 set_thread_profiler(NULL); | |
1480 if (FlatProfiler::is_active()) { | |
1481 // This is where we would decide to either give each thread it's own profiler | |
1482 // or use one global one from FlatProfiler, | |
1483 // or up to some count of the number of profiled threads, etc. | |
1484 ThreadProfiler* pp = new ThreadProfiler(); | |
1485 pp->engage(); | |
1486 set_thread_profiler(pp); | |
1487 } | |
1488 | |
1489 // Setup safepoint state info for this thread | |
1490 ThreadSafepointState::create(this); | |
1491 | |
1492 debug_only(_java_call_counter = 0); | |
1493 | |
1494 // JVMTI PopFrame support | |
1495 _popframe_condition = popframe_inactive; | |
1496 _popframe_preserved_args = NULL; | |
1497 _popframe_preserved_args_size = 0; | |
1498 | |
1499 pd_initialize(); | |
1500 } | |
1501 | |
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1502 #if INCLUDE_ALL_GCS |
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1503 SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
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1504 DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
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1505 #endif // INCLUDE_ALL_GCS |
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1506 |
4006 | 1507 JavaThread::JavaThread(bool is_attaching_via_jni) : |
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1508 Thread() |
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1509 #if INCLUDE_ALL_GCS |
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1510 , _satb_mark_queue(&_satb_mark_queue_set), |
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1511 _dirty_card_queue(&_dirty_card_queue_set) |
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1512 #endif // INCLUDE_ALL_GCS |
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1513 { |
0 | 1514 initialize(); |
4006 | 1515 if (is_attaching_via_jni) { |
1516 _jni_attach_state = _attaching_via_jni; | |
1517 } else { | |
1518 _jni_attach_state = _not_attaching_via_jni; | |
1519 } | |
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1520 assert(deferred_card_mark().is_empty(), "Default MemRegion ctor"); |
6197 | 1521 _safepoint_visible = false; |
0 | 1522 } |
1523 | |
1524 bool JavaThread::reguard_stack(address cur_sp) { | |
1525 if (_stack_guard_state != stack_guard_yellow_disabled) { | |
1526 return true; // Stack already guarded or guard pages not needed. | |
1527 } | |
1528 | |
1529 if (register_stack_overflow()) { | |
1530 // For those architectures which have separate register and | |
1531 // memory stacks, we must check the register stack to see if | |
1532 // it has overflowed. | |
1533 return false; | |
1534 } | |
1535 | |
1536 // Java code never executes within the yellow zone: the latter is only | |
1537 // there to provoke an exception during stack banging. If java code | |
1538 // is executing there, either StackShadowPages should be larger, or | |
1539 // some exception code in c1, c2 or the interpreter isn't unwinding | |
1540 // when it should. | |
1541 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); | |
1542 | |
1543 enable_stack_yellow_zone(); | |
1544 return true; | |
1545 } | |
1546 | |
1547 bool JavaThread::reguard_stack(void) { | |
1548 return reguard_stack(os::current_stack_pointer()); | |
1549 } | |
1550 | |
1551 | |
1552 void JavaThread::block_if_vm_exited() { | |
1553 if (_terminated == _vm_exited) { | |
1554 // _vm_exited is set at safepoint, and Threads_lock is never released | |
1555 // we will block here forever | |
1556 Threads_lock->lock_without_safepoint_check(); | |
1557 ShouldNotReachHere(); | |
1558 } | |
1559 } | |
1560 | |
1561 | |
1562 // Remove this ifdef when C1 is ported to the compiler interface. | |
1563 static void compiler_thread_entry(JavaThread* thread, TRAPS); | |
1564 | |
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1565 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
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1566 Thread() |
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1567 #if INCLUDE_ALL_GCS |
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1568 , _satb_mark_queue(&_satb_mark_queue_set), |
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1569 _dirty_card_queue(&_dirty_card_queue_set) |
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1570 #endif // INCLUDE_ALL_GCS |
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1571 { |
0 | 1572 if (TraceThreadEvents) { |
1573 tty->print_cr("creating thread %p", this); | |
1574 } | |
1575 initialize(); | |
4006 | 1576 _jni_attach_state = _not_attaching_via_jni; |
0 | 1577 set_entry_point(entry_point); |
1578 // Create the native thread itself. | |
1579 // %note runtime_23 | |
1580 os::ThreadType thr_type = os::java_thread; | |
1581 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : | |
1582 os::java_thread; | |
1583 os::create_thread(this, thr_type, stack_sz); | |
6197 | 1584 _safepoint_visible = false; |
0 | 1585 // The _osthread may be NULL here because we ran out of memory (too many threads active). |
1586 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller | |
1587 // may hold a lock and all locks must be unlocked before throwing the exception (throwing | |
1588 // the exception consists of creating the exception object & initializing it, initialization | |
1589 // will leave the VM via a JavaCall and then all locks must be unlocked). | |
1590 // | |
1591 // The thread is still suspended when we reach here. Thread must be explicit started | |
1592 // by creator! Furthermore, the thread must also explicitly be added to the Threads list | |
1593 // by calling Threads:add. The reason why this is not done here, is because the thread | |
1594 // object must be fully initialized (take a look at JVM_Start) | |
1595 } | |
1596 | |
1597 JavaThread::~JavaThread() { | |
1598 if (TraceThreadEvents) { | |
1599 tty->print_cr("terminate thread %p", this); | |
1600 } | |
1601 | |
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1602 // By now, this thread should already be invisible to safepoint, |
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1603 // and its per-thread recorder also collected. |
6197 | 1604 assert(!is_safepoint_visible(), "wrong state"); |
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1605 #if INCLUDE_NMT |
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1606 assert(get_recorder() == NULL, "Already collected"); |
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1607 #endif // INCLUDE_NMT |
6197 | 1608 |
0 | 1609 // JSR166 -- return the parker to the free list |
1610 Parker::Release(_parker); | |
1611 _parker = NULL ; | |
1612 | |
1613 // Free any remaining previous UnrollBlock | |
1614 vframeArray* old_array = vframe_array_last(); | |
1615 | |
1616 if (old_array != NULL) { | |
1617 Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); | |
1618 old_array->set_unroll_block(NULL); | |
1619 delete old_info; | |
1620 delete old_array; | |
1621 } | |
1622 | |
1623 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); | |
1624 if (deferred != NULL) { | |
1625 // This can only happen if thread is destroyed before deoptimization occurs. | |
1626 assert(deferred->length() != 0, "empty array!"); | |
1627 do { | |
1628 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); | |
1629 deferred->remove_at(0); | |
1630 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
1631 delete dlv; | |
1632 } while (deferred->length() != 0); | |
1633 delete deferred; | |
1634 } | |
1635 | |
1636 // All Java related clean up happens in exit | |
1637 ThreadSafepointState::destroy(this); | |
1638 if (_thread_profiler != NULL) delete _thread_profiler; | |
1639 if (_thread_stat != NULL) delete _thread_stat; | |
1640 } | |
1641 | |
1642 | |
1643 // The first routine called by a new Java thread | |
1644 void JavaThread::run() { | |
1645 // initialize thread-local alloc buffer related fields | |
1646 this->initialize_tlab(); | |
1647 | |
1648 // used to test validitity of stack trace backs | |
1649 this->record_base_of_stack_pointer(); | |
1650 | |
1651 // Record real stack base and size. | |
1652 this->record_stack_base_and_size(); | |
1653 | |
1654 // Initialize thread local storage; set before calling MutexLocker | |
1655 this->initialize_thread_local_storage(); | |
1656 | |
1657 this->create_stack_guard_pages(); | |
1658 | |
1681
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1659 this->cache_global_variables(); |
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1660 |
0 | 1661 // Thread is now sufficient initialized to be handled by the safepoint code as being |
1662 // in the VM. Change thread state from _thread_new to _thread_in_vm | |
1663 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); | |
1664 | |
1665 assert(JavaThread::current() == this, "sanity check"); | |
1666 assert(!Thread::current()->owns_locks(), "sanity check"); | |
1667 | |
1668 DTRACE_THREAD_PROBE(start, this); | |
1669 | |
1670 // This operation might block. We call that after all safepoint checks for a new thread has | |
1671 // been completed. | |
1672 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1673 | |
1674 if (JvmtiExport::should_post_thread_life()) { | |
1675 JvmtiExport::post_thread_start(this); | |
1676 } | |
1677 | |
10405 | 1678 EventThreadStart event; |
1679 if (event.should_commit()) { | |
1680 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1681 event.commit(); | |
1682 } | |
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1683 |
0 | 1684 // We call another function to do the rest so we are sure that the stack addresses used |
1685 // from there will be lower than the stack base just computed | |
1686 thread_main_inner(); | |
1687 | |
1688 // Note, thread is no longer valid at this point! | |
1689 } | |
1690 | |
1691 | |
1692 void JavaThread::thread_main_inner() { | |
1693 assert(JavaThread::current() == this, "sanity check"); | |
1694 assert(this->threadObj() != NULL, "just checking"); | |
1695 | |
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1696 // Execute thread entry point unless this thread has a pending exception |
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1697 // or has been stopped before starting. |
0 | 1698 // Note: Due to JVM_StopThread we can have pending exceptions already! |
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1699 if (!this->has_pending_exception() && |
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1700 !java_lang_Thread::is_stillborn(this->threadObj())) { |
4006 | 1701 { |
1702 ResourceMark rm(this); | |
1703 this->set_native_thread_name(this->get_thread_name()); | |
1704 } | |
0 | 1705 HandleMark hm(this); |
1706 this->entry_point()(this, this); | |
1707 } | |
1708 | |
1709 DTRACE_THREAD_PROBE(stop, this); | |
1710 | |
1711 this->exit(false); | |
1712 delete this; | |
1713 } | |
1714 | |
1715 | |
1716 static void ensure_join(JavaThread* thread) { | |
1717 // We do not need to grap the Threads_lock, since we are operating on ourself. | |
1718 Handle threadObj(thread, thread->threadObj()); | |
1719 assert(threadObj.not_null(), "java thread object must exist"); | |
1720 ObjectLocker lock(threadObj, thread); | |
1721 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1722 thread->clear_pending_exception(); | |
1723 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. | |
1724 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); | |
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1725 // Clear the native thread instance - this makes isAlive return false and allows the join() |
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1726 // to complete once we've done the notify_all below |
0 | 1727 java_lang_Thread::set_thread(threadObj(), NULL); |
1728 lock.notify_all(thread); | |
1729 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1730 thread->clear_pending_exception(); | |
1731 } | |
1732 | |
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1733 |
0 | 1734 // For any new cleanup additions, please check to see if they need to be applied to |
1735 // cleanup_failed_attach_current_thread as well. | |
1736 void JavaThread::exit(bool destroy_vm, ExitType exit_type) { | |
1737 assert(this == JavaThread::current(), "thread consistency check"); | |
1738 | |
1739 HandleMark hm(this); | |
1740 Handle uncaught_exception(this, this->pending_exception()); | |
1741 this->clear_pending_exception(); | |
1742 Handle threadObj(this, this->threadObj()); | |
1743 assert(threadObj.not_null(), "Java thread object should be created"); | |
1744 | |
1745 if (get_thread_profiler() != NULL) { | |
1746 get_thread_profiler()->disengage(); | |
1747 ResourceMark rm; | |
1748 get_thread_profiler()->print(get_thread_name()); | |
1749 } | |
1750 | |
1751 | |
1752 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place | |
1753 { | |
1754 EXCEPTION_MARK; | |
1755 | |
1756 CLEAR_PENDING_EXCEPTION; | |
1757 } | |
1758 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This | |
1759 // has to be fixed by a runtime query method | |
1760 if (!destroy_vm || JDK_Version::is_jdk12x_version()) { | |
1761 // JSR-166: change call from from ThreadGroup.uncaughtException to | |
1762 // java.lang.Thread.dispatchUncaughtException | |
1763 if (uncaught_exception.not_null()) { | |
1764 Handle group(this, java_lang_Thread::threadGroup(threadObj())); | |
1765 { | |
1766 EXCEPTION_MARK; | |
1767 // Check if the method Thread.dispatchUncaughtException() exists. If so | |
1768 // call it. Otherwise we have an older library without the JSR-166 changes, | |
1769 // so call ThreadGroup.uncaughtException() | |
1770 KlassHandle recvrKlass(THREAD, threadObj->klass()); | |
1771 CallInfo callinfo; | |
1142 | 1772 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1773 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
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1774 vmSymbols::dispatchUncaughtException_name(), |
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1775 vmSymbols::throwable_void_signature(), |
0 | 1776 KlassHandle(), false, false, THREAD); |
1777 CLEAR_PENDING_EXCEPTION; | |
1778 methodHandle method = callinfo.selected_method(); | |
1779 if (method.not_null()) { | |
1780 JavaValue result(T_VOID); | |
1781 JavaCalls::call_virtual(&result, | |
1782 threadObj, thread_klass, | |
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1783 vmSymbols::dispatchUncaughtException_name(), |
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1784 vmSymbols::throwable_void_signature(), |
0 | 1785 uncaught_exception, |
1786 THREAD); | |
1787 } else { | |
1142 | 1788 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 1789 JavaValue result(T_VOID); |
1790 JavaCalls::call_virtual(&result, | |
1791 group, thread_group, | |
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1792 vmSymbols::uncaughtException_name(), |
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1793 vmSymbols::thread_throwable_void_signature(), |
0 | 1794 threadObj, // Arg 1 |
1795 uncaught_exception, // Arg 2 | |
1796 THREAD); | |
1797 } | |
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1798 if (HAS_PENDING_EXCEPTION) { |
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1799 ResourceMark rm(this); |
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1800 jio_fprintf(defaultStream::error_stream(), |
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1801 "\nException: %s thrown from the UncaughtExceptionHandler" |
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1802 " in thread \"%s\"\n", |
6983 | 1803 pending_exception()->klass()->external_name(), |
2200
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1804 get_thread_name()); |
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1805 CLEAR_PENDING_EXCEPTION; |
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1806 } |
0 | 1807 } |
1808 } | |
1809 | |
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1810 // Called before the java thread exit since we want to read info |
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1811 // from java_lang_Thread object |
10405 | 1812 EventThreadEnd event; |
1813 if (event.should_commit()) { | |
1814 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1815 event.commit(); | |
1816 } | |
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1817 |
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1818 // Call after last event on thread |
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1819 EVENT_THREAD_EXIT(this); |
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1820 |
0 | 1821 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
1822 // the execution of the method. If that is not enough, then we don't really care. Thread.stop | |
1823 // is deprecated anyhow. | |
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1824 if (!is_Compiler_thread()) { |
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1825 int count = 3; |
0 | 1826 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { |
1827 EXCEPTION_MARK; | |
1828 JavaValue result(T_VOID); | |
1142 | 1829 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1830 JavaCalls::call_virtual(&result, |
1831 threadObj, thread_klass, | |
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1832 vmSymbols::exit_method_name(), |
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1833 vmSymbols::void_method_signature(), |
0 | 1834 THREAD); |
1835 CLEAR_PENDING_EXCEPTION; | |
1836 } | |
1837 } | |
1838 // notify JVMTI | |
1839 if (JvmtiExport::should_post_thread_life()) { | |
1840 JvmtiExport::post_thread_end(this); | |
1841 } | |
1842 | |
1843 // We have notified the agents that we are exiting, before we go on, | |
1844 // we must check for a pending external suspend request and honor it | |
1845 // in order to not surprise the thread that made the suspend request. | |
1846 while (true) { | |
1847 { | |
1848 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1849 if (!is_external_suspend()) { | |
1850 set_terminated(_thread_exiting); | |
1851 ThreadService::current_thread_exiting(this); | |
1852 break; | |
1853 } | |
1854 // Implied else: | |
1855 // Things get a little tricky here. We have a pending external | |
1856 // suspend request, but we are holding the SR_lock so we | |
1857 // can't just self-suspend. So we temporarily drop the lock | |
1858 // and then self-suspend. | |
1859 } | |
1860 | |
1861 ThreadBlockInVM tbivm(this); | |
1862 java_suspend_self(); | |
1863 | |
1864 // We're done with this suspend request, but we have to loop around | |
1865 // and check again. Eventually we will get SR_lock without a pending | |
1866 // external suspend request and will be able to mark ourselves as | |
1867 // exiting. | |
1868 } | |
1869 // no more external suspends are allowed at this point | |
1870 } else { | |
1871 // before_exit() has already posted JVMTI THREAD_END events | |
1872 } | |
1873 | |
1874 // Notify waiters on thread object. This has to be done after exit() is called | |
1875 // on the thread (if the thread is the last thread in a daemon ThreadGroup the | |
1876 // group should have the destroyed bit set before waiters are notified). | |
1877 ensure_join(this); | |
1878 assert(!this->has_pending_exception(), "ensure_join should have cleared"); | |
1879 | |
1880 // 6282335 JNI DetachCurrentThread spec states that all Java monitors | |
1881 // held by this thread must be released. A detach operation must only | |
1882 // get here if there are no Java frames on the stack. Therefore, any | |
1883 // owned monitors at this point MUST be JNI-acquired monitors which are | |
1884 // pre-inflated and in the monitor cache. | |
1885 // | |
1886 // ensure_join() ignores IllegalThreadStateExceptions, and so does this. | |
1887 if (exit_type == jni_detach && JNIDetachReleasesMonitors) { | |
1888 assert(!this->has_last_Java_frame(), "detaching with Java frames?"); | |
1889 ObjectSynchronizer::release_monitors_owned_by_thread(this); | |
1890 assert(!this->has_pending_exception(), "release_monitors should have cleared"); | |
1891 } | |
1892 | |
1893 // These things needs to be done while we are still a Java Thread. Make sure that thread | |
1894 // is in a consistent state, in case GC happens | |
1895 assert(_privileged_stack_top == NULL, "must be NULL when we get here"); | |
1896 | |
1897 if (active_handles() != NULL) { | |
1898 JNIHandleBlock* block = active_handles(); | |
1899 set_active_handles(NULL); | |
1900 JNIHandleBlock::release_block(block); | |
1901 } | |
1902 | |
1903 if (free_handle_block() != NULL) { | |
1904 JNIHandleBlock* block = free_handle_block(); | |
1905 set_free_handle_block(NULL); | |
1906 JNIHandleBlock::release_block(block); | |
1907 } | |
1908 | |
1909 // These have to be removed while this is still a valid thread. | |
1910 remove_stack_guard_pages(); | |
1911 | |
1912 if (UseTLAB) { | |
1913 tlab().make_parsable(true); // retire TLAB | |
1914 } | |
1915 | |
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1916 if (JvmtiEnv::environments_might_exist()) { |
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1917 JvmtiExport::cleanup_thread(this); |
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1918 } |
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1919 |
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1920 // We must flush any deferred card marks before removing a thread from |
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1921 // the list of active threads. |
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1922 Universe::heap()->flush_deferred_store_barrier(this); |
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1923 assert(deferred_card_mark().is_empty(), "Should have been flushed"); |
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1924 |
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1925 #if INCLUDE_ALL_GCS |
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1926 // We must flush the G1-related buffers before removing a thread |
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1927 // from the list of active threads. We must do this after any deferred |
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1928 // card marks have been flushed (above) so that any entries that are |
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1929 // added to the thread's dirty card queue as a result are not lost. |
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1930 if (UseG1GC) { |
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1931 flush_barrier_queues(); |
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1932 } |
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1933 #endif // INCLUDE_ALL_GCS |
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1934 |
0 | 1935 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
1936 Threads::remove(this); | |
1937 } | |
1938 | |
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1939 #if INCLUDE_ALL_GCS |
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1940 // Flush G1-related queues. |
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1941 void JavaThread::flush_barrier_queues() { |
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1942 satb_mark_queue().flush(); |
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1943 dirty_card_queue().flush(); |
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1944 } |
1842
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1945 |
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1946 void JavaThread::initialize_queues() { |
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|
1947 assert(!SafepointSynchronize::is_at_safepoint(), |
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1948 "we should not be at a safepoint"); |
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1949 |
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|
1950 ObjPtrQueue& satb_queue = satb_mark_queue(); |
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|
1951 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
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1952 // The SATB queue should have been constructed with its active |
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1953 // field set to false. |
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|
1954 assert(!satb_queue.is_active(), "SATB queue should not be active"); |
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|
1955 assert(satb_queue.is_empty(), "SATB queue should be empty"); |
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1956 // If we are creating the thread during a marking cycle, we should |
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1957 // set the active field of the SATB queue to true. |
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1958 if (satb_queue_set.is_active()) { |
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1959 satb_queue.set_active(true); |
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|
1960 } |
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1961 |
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|
1962 DirtyCardQueue& dirty_queue = dirty_card_queue(); |
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1963 // The dirty card queue should have been constructed with its |
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1964 // active field set to true. |
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1965 assert(dirty_queue.is_active(), "dirty card queue should be active"); |
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1966 } |
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1967 #endif // INCLUDE_ALL_GCS |
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1968 |
0 | 1969 void JavaThread::cleanup_failed_attach_current_thread() { |
441
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1970 if (get_thread_profiler() != NULL) { |
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1971 get_thread_profiler()->disengage(); |
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1972 ResourceMark rm; |
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1973 get_thread_profiler()->print(get_thread_name()); |
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1974 } |
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1975 |
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1976 if (active_handles() != NULL) { |
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1977 JNIHandleBlock* block = active_handles(); |
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1978 set_active_handles(NULL); |
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1979 JNIHandleBlock::release_block(block); |
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1980 } |
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1981 |
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1982 if (free_handle_block() != NULL) { |
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1983 JNIHandleBlock* block = free_handle_block(); |
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1984 set_free_handle_block(NULL); |
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1985 JNIHandleBlock::release_block(block); |
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1986 } |
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1987 |
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1988 // These have to be removed while this is still a valid thread. |
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1989 remove_stack_guard_pages(); |
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1990 |
441
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1991 if (UseTLAB) { |
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1992 tlab().make_parsable(true); // retire TLAB, if any |
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1993 } |
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1994 |
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1995 #if INCLUDE_ALL_GCS |
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1996 if (UseG1GC) { |
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1997 flush_barrier_queues(); |
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1998 } |
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1999 #endif // INCLUDE_ALL_GCS |
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2000 |
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2001 Threads::remove(this); |
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2002 delete this; |
0 | 2003 } |
2004 | |
2005 | |
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2006 |
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2007 |
0 | 2008 JavaThread* JavaThread::active() { |
2009 Thread* thread = ThreadLocalStorage::thread(); | |
2010 assert(thread != NULL, "just checking"); | |
2011 if (thread->is_Java_thread()) { | |
2012 return (JavaThread*) thread; | |
2013 } else { | |
2014 assert(thread->is_VM_thread(), "this must be a vm thread"); | |
2015 VM_Operation* op = ((VMThread*) thread)->vm_operation(); | |
2016 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); | |
2017 assert(ret->is_Java_thread(), "must be a Java thread"); | |
2018 return ret; | |
2019 } | |
2020 } | |
2021 | |
2022 bool JavaThread::is_lock_owned(address adr) const { | |
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2023 if (Thread::is_lock_owned(adr)) return true; |
0 | 2024 |
2025 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2026 if (chunk->contains(adr)) return true; | |
2027 } | |
2028 | |
2029 return false; | |
2030 } | |
2031 | |
2032 | |
2033 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { | |
2034 chunk->set_next(monitor_chunks()); | |
2035 set_monitor_chunks(chunk); | |
2036 } | |
2037 | |
2038 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { | |
2039 guarantee(monitor_chunks() != NULL, "must be non empty"); | |
2040 if (monitor_chunks() == chunk) { | |
2041 set_monitor_chunks(chunk->next()); | |
2042 } else { | |
2043 MonitorChunk* prev = monitor_chunks(); | |
2044 while (prev->next() != chunk) prev = prev->next(); | |
2045 prev->set_next(chunk->next()); | |
2046 } | |
2047 } | |
2048 | |
2049 // JVM support. | |
2050 | |
2051 // Note: this function shouldn't block if it's called in | |
2052 // _thread_in_native_trans state (such as from | |
2053 // check_special_condition_for_native_trans()). | |
2054 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { | |
2055 | |
2056 if (has_last_Java_frame() && has_async_condition()) { | |
2057 // If we are at a polling page safepoint (not a poll return) | |
2058 // then we must defer async exception because live registers | |
2059 // will be clobbered by the exception path. Poll return is | |
2060 // ok because the call we a returning from already collides | |
2061 // with exception handling registers and so there is no issue. | |
2062 // (The exception handling path kills call result registers but | |
2063 // this is ok since the exception kills the result anyway). | |
2064 | |
2065 if (is_at_poll_safepoint()) { | |
2066 // if the code we are returning to has deoptimized we must defer | |
2067 // the exception otherwise live registers get clobbered on the | |
2068 // exception path before deoptimization is able to retrieve them. | |
2069 // | |
2070 RegisterMap map(this, false); | |
2071 frame caller_fr = last_frame().sender(&map); | |
2072 assert(caller_fr.is_compiled_frame(), "what?"); | |
2073 if (caller_fr.is_deoptimized_frame()) { | |
2074 if (TraceExceptions) { | |
2075 ResourceMark rm; | |
2076 tty->print_cr("deferred async exception at compiled safepoint"); | |
2077 } | |
2078 return; | |
2079 } | |
2080 } | |
2081 } | |
2082 | |
2083 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); | |
2084 if (condition == _no_async_condition) { | |
2085 // Conditions have changed since has_special_runtime_exit_condition() | |
2086 // was called: | |
2087 // - if we were here only because of an external suspend request, | |
2088 // then that was taken care of above (or cancelled) so we are done | |
2089 // - if we were here because of another async request, then it has | |
2090 // been cleared between the has_special_runtime_exit_condition() | |
2091 // and now so again we are done | |
2092 return; | |
2093 } | |
2094 | |
2095 // Check for pending async. exception | |
2096 if (_pending_async_exception != NULL) { | |
2097 // Only overwrite an already pending exception, if it is not a threadDeath. | |
1142 | 2098 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2099 |
2100 // We cannot call Exceptions::_throw(...) here because we cannot block | |
2101 set_pending_exception(_pending_async_exception, __FILE__, __LINE__); | |
2102 | |
2103 if (TraceExceptions) { | |
2104 ResourceMark rm; | |
2105 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); | |
2106 if (has_last_Java_frame() ) { | |
2107 frame f = last_frame(); | |
2108 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); | |
2109 } | |
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2110 tty->print_cr(" of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2111 } |
2112 _pending_async_exception = NULL; | |
2113 clear_has_async_exception(); | |
2114 } | |
2115 } | |
2116 | |
2117 if (check_unsafe_error && | |
2118 condition == _async_unsafe_access_error && !has_pending_exception()) { | |
2119 condition = _no_async_condition; // done | |
2120 switch (thread_state()) { | |
2121 case _thread_in_vm: | |
2122 { | |
2123 JavaThread* THREAD = this; | |
2124 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2125 } | |
2126 case _thread_in_native: | |
2127 { | |
2128 ThreadInVMfromNative tiv(this); | |
2129 JavaThread* THREAD = this; | |
2130 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2131 } | |
2132 case _thread_in_Java: | |
2133 { | |
2134 ThreadInVMfromJava tiv(this); | |
2135 JavaThread* THREAD = this; | |
2136 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); | |
2137 } | |
2138 default: | |
2139 ShouldNotReachHere(); | |
2140 } | |
2141 } | |
2142 | |
2143 assert(condition == _no_async_condition || has_pending_exception() || | |
2144 (!check_unsafe_error && condition == _async_unsafe_access_error), | |
2145 "must have handled the async condition, if no exception"); | |
2146 } | |
2147 | |
2148 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { | |
2149 // | |
2150 // Check for pending external suspend. Internal suspend requests do | |
2151 // not use handle_special_runtime_exit_condition(). | |
2152 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2153 // thread is not the current thread. In older versions of jdbx, jdbx | |
2154 // threads could call into the VM with another thread's JNIEnv so we | |
2155 // can be here operating on behalf of a suspended thread (4432884). | |
2156 bool do_self_suspend = is_external_suspend_with_lock(); | |
2157 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { | |
2158 // | |
2159 // Because thread is external suspended the safepoint code will count | |
2160 // thread as at a safepoint. This can be odd because we can be here | |
2161 // as _thread_in_Java which would normally transition to _thread_blocked | |
2162 // at a safepoint. We would like to mark the thread as _thread_blocked | |
2163 // before calling java_suspend_self like all other callers of it but | |
2164 // we must then observe proper safepoint protocol. (We can't leave | |
2165 // _thread_blocked with a safepoint in progress). However we can be | |
2166 // here as _thread_in_native_trans so we can't use a normal transition | |
2167 // constructor/destructor pair because they assert on that type of | |
2168 // transition. We could do something like: | |
2169 // | |
2170 // JavaThreadState state = thread_state(); | |
2171 // set_thread_state(_thread_in_vm); | |
2172 // { | |
2173 // ThreadBlockInVM tbivm(this); | |
2174 // java_suspend_self() | |
2175 // } | |
2176 // set_thread_state(_thread_in_vm_trans); | |
2177 // if (safepoint) block; | |
2178 // set_thread_state(state); | |
2179 // | |
2180 // but that is pretty messy. Instead we just go with the way the | |
2181 // code has worked before and note that this is the only path to | |
2182 // java_suspend_self that doesn't put the thread in _thread_blocked | |
2183 // mode. | |
2184 | |
2185 frame_anchor()->make_walkable(this); | |
2186 java_suspend_self(); | |
2187 | |
2188 // We might be here for reasons in addition to the self-suspend request | |
2189 // so check for other async requests. | |
2190 } | |
2191 | |
2192 if (check_asyncs) { | |
2193 check_and_handle_async_exceptions(); | |
2194 } | |
2195 } | |
2196 | |
2197 void JavaThread::send_thread_stop(oop java_throwable) { | |
2198 assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); | |
2199 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); | |
2200 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
2201 | |
2202 // Do not throw asynchronous exceptions against the compiler thread | |
2203 // (the compiler thread should not be a Java thread -- fix in 1.4.2) | |
2204 if (is_Compiler_thread()) return; | |
2205 | |
2206 { | |
2207 // Actually throw the Throwable against the target Thread - however | |
2208 // only if there is no thread death exception installed already. | |
1142 | 2209 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2210 // If the topmost frame is a runtime stub, then we are calling into |
2211 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) | |
2212 // must deoptimize the caller before continuing, as the compiled exception handler table | |
2213 // may not be valid | |
2214 if (has_last_Java_frame()) { | |
2215 frame f = last_frame(); | |
2216 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { | |
2217 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2218 RegisterMap reg_map(this, UseBiasedLocking); | |
2219 frame compiled_frame = f.sender(®_map); | |
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2220 if (!StressCompiledExceptionHandlers && compiled_frame.can_be_deoptimized()) { |
0 | 2221 Deoptimization::deoptimize(this, compiled_frame, ®_map); |
2222 } | |
2223 } | |
2224 } | |
2225 | |
2226 // Set async. pending exception in thread. | |
2227 set_pending_async_exception(java_throwable); | |
2228 | |
2229 if (TraceExceptions) { | |
2230 ResourceMark rm; | |
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2231 tty->print_cr("Pending Async. exception installed of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2232 } |
2233 // for AbortVMOnException flag | |
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2234 NOT_PRODUCT(Exceptions::debug_check_abort(InstanceKlass::cast(_pending_async_exception->klass())->external_name())); |
0 | 2235 } |
2236 } | |
2237 | |
2238 | |
2239 // Interrupt thread so it will wake up from a potential wait() | |
2240 Thread::interrupt(this); | |
2241 } | |
2242 | |
2243 // External suspension mechanism. | |
2244 // | |
2245 // Tell the VM to suspend a thread when ever it knows that it does not hold on | |
2246 // to any VM_locks and it is at a transition | |
2247 // Self-suspension will happen on the transition out of the vm. | |
2248 // Catch "this" coming in from JNIEnv pointers when the thread has been freed | |
2249 // | |
2250 // Guarantees on return: | |
2251 // + Target thread will not execute any new bytecode (that's why we need to | |
2252 // force a safepoint) | |
2253 // + Target thread will not enter any new monitors | |
2254 // | |
2255 void JavaThread::java_suspend() { | |
2256 { MutexLocker mu(Threads_lock); | |
2257 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { | |
2258 return; | |
2259 } | |
2260 } | |
2261 | |
2262 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2263 if (!is_external_suspend()) { | |
2264 // a racing resume has cancelled us; bail out now | |
2265 return; | |
2266 } | |
2267 | |
2268 // suspend is done | |
2269 uint32_t debug_bits = 0; | |
2270 // Warning: is_ext_suspend_completed() may temporarily drop the | |
2271 // SR_lock to allow the thread to reach a stable thread state if | |
2272 // it is currently in a transient thread state. | |
2273 if (is_ext_suspend_completed(false /* !called_by_wait */, | |
2274 SuspendRetryDelay, &debug_bits) ) { | |
2275 return; | |
2276 } | |
2277 } | |
2278 | |
2279 VM_ForceSafepoint vm_suspend; | |
2280 VMThread::execute(&vm_suspend); | |
2281 } | |
2282 | |
2283 // Part II of external suspension. | |
2284 // A JavaThread self suspends when it detects a pending external suspend | |
2285 // request. This is usually on transitions. It is also done in places | |
2286 // where continuing to the next transition would surprise the caller, | |
2287 // e.g., monitor entry. | |
2288 // | |
2289 // Returns the number of times that the thread self-suspended. | |
2290 // | |
2291 // Note: DO NOT call java_suspend_self() when you just want to block current | |
2292 // thread. java_suspend_self() is the second stage of cooperative | |
2293 // suspension for external suspend requests and should only be used | |
2294 // to complete an external suspend request. | |
2295 // | |
2296 int JavaThread::java_suspend_self() { | |
2297 int ret = 0; | |
2298 | |
2299 // we are in the process of exiting so don't suspend | |
2300 if (is_exiting()) { | |
2301 clear_external_suspend(); | |
2302 return ret; | |
2303 } | |
2304 | |
2305 assert(_anchor.walkable() || | |
2306 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), | |
2307 "must have walkable stack"); | |
2308 | |
2309 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2310 | |
979 | 2311 assert(!this->is_ext_suspended(), |
0 | 2312 "a thread trying to self-suspend should not already be suspended"); |
2313 | |
2314 if (this->is_suspend_equivalent()) { | |
2315 // If we are self-suspending as a result of the lifting of a | |
2316 // suspend equivalent condition, then the suspend_equivalent | |
2317 // flag is not cleared until we set the ext_suspended flag so | |
2318 // that wait_for_ext_suspend_completion() returns consistent | |
2319 // results. | |
2320 this->clear_suspend_equivalent(); | |
2321 } | |
2322 | |
2323 // A racing resume may have cancelled us before we grabbed SR_lock | |
2324 // above. Or another external suspend request could be waiting for us | |
2325 // by the time we return from SR_lock()->wait(). The thread | |
2326 // that requested the suspension may already be trying to walk our | |
2327 // stack and if we return now, we can change the stack out from under | |
2328 // it. This would be a "bad thing (TM)" and cause the stack walker | |
2329 // to crash. We stay self-suspended until there are no more pending | |
2330 // external suspend requests. | |
2331 while (is_external_suspend()) { | |
2332 ret++; | |
2333 this->set_ext_suspended(); | |
2334 | |
2335 // _ext_suspended flag is cleared by java_resume() | |
2336 while (is_ext_suspended()) { | |
2337 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); | |
2338 } | |
2339 } | |
2340 | |
2341 return ret; | |
2342 } | |
2343 | |
2344 #ifdef ASSERT | |
2345 // verify the JavaThread has not yet been published in the Threads::list, and | |
2346 // hence doesn't need protection from concurrent access at this stage | |
2347 void JavaThread::verify_not_published() { | |
2348 if (!Threads_lock->owned_by_self()) { | |
2349 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); | |
2350 assert( !Threads::includes(this), | |
2351 "java thread shouldn't have been published yet!"); | |
2352 } | |
2353 else { | |
2354 assert( !Threads::includes(this), | |
2355 "java thread shouldn't have been published yet!"); | |
2356 } | |
2357 } | |
2358 #endif | |
2359 | |
2360 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2361 // progress or when _suspend_flags is non-zero. | |
2362 // Current thread needs to self-suspend if there is a suspend request and/or | |
2363 // block if a safepoint is in progress. | |
2364 // Async exception ISN'T checked. | |
2365 // Note only the ThreadInVMfromNative transition can call this function | |
2366 // directly and when thread state is _thread_in_native_trans | |
2367 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { | |
2368 assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); | |
2369 | |
2370 JavaThread *curJT = JavaThread::current(); | |
2371 bool do_self_suspend = thread->is_external_suspend(); | |
2372 | |
2373 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); | |
2374 | |
2375 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2376 // thread is not the current thread. In older versions of jdbx, jdbx | |
2377 // threads could call into the VM with another thread's JNIEnv so we | |
2378 // can be here operating on behalf of a suspended thread (4432884). | |
2379 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { | |
2380 JavaThreadState state = thread->thread_state(); | |
2381 | |
2382 // We mark this thread_blocked state as a suspend-equivalent so | |
2383 // that a caller to is_ext_suspend_completed() won't be confused. | |
2384 // The suspend-equivalent state is cleared by java_suspend_self(). | |
2385 thread->set_suspend_equivalent(); | |
2386 | |
2387 // If the safepoint code sees the _thread_in_native_trans state, it will | |
2388 // wait until the thread changes to other thread state. There is no | |
2389 // guarantee on how soon we can obtain the SR_lock and complete the | |
2390 // self-suspend request. It would be a bad idea to let safepoint wait for | |
2391 // too long. Temporarily change the state to _thread_blocked to | |
2392 // let the VM thread know that this thread is ready for GC. The problem | |
2393 // of changing thread state is that safepoint could happen just after | |
2394 // java_suspend_self() returns after being resumed, and VM thread will | |
2395 // see the _thread_blocked state. We must check for safepoint | |
2396 // after restoring the state and make sure we won't leave while a safepoint | |
2397 // is in progress. | |
2398 thread->set_thread_state(_thread_blocked); | |
2399 thread->java_suspend_self(); | |
2400 thread->set_thread_state(state); | |
2401 // Make sure new state is seen by VM thread | |
2402 if (os::is_MP()) { | |
2403 if (UseMembar) { | |
2404 // Force a fence between the write above and read below | |
2405 OrderAccess::fence(); | |
2406 } else { | |
2407 // Must use this rather than serialization page in particular on Windows | |
2408 InterfaceSupport::serialize_memory(thread); | |
2409 } | |
2410 } | |
2411 } | |
2412 | |
2413 if (SafepointSynchronize::do_call_back()) { | |
2414 // If we are safepointing, then block the caller which may not be | |
2415 // the same as the target thread (see above). | |
2416 SafepointSynchronize::block(curJT); | |
2417 } | |
2418 | |
2419 if (thread->is_deopt_suspend()) { | |
2420 thread->clear_deopt_suspend(); | |
2421 RegisterMap map(thread, false); | |
2422 frame f = thread->last_frame(); | |
2423 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { | |
2424 f = f.sender(&map); | |
2425 } | |
2426 if (f.id() == thread->must_deopt_id()) { | |
2427 thread->clear_must_deopt_id(); | |
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2428 f.deoptimize(thread); |
0 | 2429 } else { |
2430 fatal("missed deoptimization!"); | |
2431 } | |
2432 } | |
2433 } | |
2434 | |
2435 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2436 // progress or when _suspend_flags is non-zero. | |
2437 // Current thread needs to self-suspend if there is a suspend request and/or | |
2438 // block if a safepoint is in progress. | |
2439 // Also check for pending async exception (not including unsafe access error). | |
2440 // Note only the native==>VM/Java barriers can call this function and when | |
2441 // thread state is _thread_in_native_trans. | |
2442 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { | |
2443 check_safepoint_and_suspend_for_native_trans(thread); | |
2444 | |
2445 if (thread->has_async_exception()) { | |
2446 // We are in _thread_in_native_trans state, don't handle unsafe | |
2447 // access error since that may block. | |
2448 thread->check_and_handle_async_exceptions(false); | |
2449 } | |
2450 } | |
2451 | |
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2452 // This is a variant of the normal |
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2453 // check_special_condition_for_native_trans with slightly different |
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2454 // semantics for use by critical native wrappers. It does all the |
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2455 // normal checks but also performs the transition back into |
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2456 // thread_in_Java state. This is required so that critical natives |
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2457 // can potentially block and perform a GC if they are the last thread |
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2458 // exiting the GC_locker. |
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2459 void JavaThread::check_special_condition_for_native_trans_and_transition(JavaThread *thread) { |
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2460 check_special_condition_for_native_trans(thread); |
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2461 |
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2462 // Finish the transition |
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2463 thread->set_thread_state(_thread_in_Java); |
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2464 |
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2465 if (thread->do_critical_native_unlock()) { |
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2466 ThreadInVMfromJavaNoAsyncException tiv(thread); |
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2467 GC_locker::unlock_critical(thread); |
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2468 thread->clear_critical_native_unlock(); |
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2469 } |
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2470 } |
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2471 |
0 | 2472 // We need to guarantee the Threads_lock here, since resumes are not |
2473 // allowed during safepoint synchronization | |
2474 // Can only resume from an external suspension | |
2475 void JavaThread::java_resume() { | |
2476 assert_locked_or_safepoint(Threads_lock); | |
2477 | |
2478 // Sanity check: thread is gone, has started exiting or the thread | |
2479 // was not externally suspended. | |
2480 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { | |
2481 return; | |
2482 } | |
2483 | |
2484 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2485 | |
2486 clear_external_suspend(); | |
2487 | |
2488 if (is_ext_suspended()) { | |
2489 clear_ext_suspended(); | |
2490 SR_lock()->notify_all(); | |
2491 } | |
2492 } | |
2493 | |
2494 void JavaThread::create_stack_guard_pages() { | |
2495 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; | |
2496 address low_addr = stack_base() - stack_size(); | |
2497 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2498 | |
2499 int allocate = os::allocate_stack_guard_pages(); | |
2500 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); | |
2501 | |
1320
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2502 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
0 | 2503 warning("Attempt to allocate stack guard pages failed."); |
2504 return; | |
2505 } | |
2506 | |
2507 if (os::guard_memory((char *) low_addr, len)) { | |
2508 _stack_guard_state = stack_guard_enabled; | |
2509 } else { | |
2510 warning("Attempt to protect stack guard pages failed."); | |
2511 if (os::uncommit_memory((char *) low_addr, len)) { | |
2512 warning("Attempt to deallocate stack guard pages failed."); | |
2513 } | |
2514 } | |
2515 } | |
2516 | |
2517 void JavaThread::remove_stack_guard_pages() { | |
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2518 assert(Thread::current() == this, "from different thread"); |
0 | 2519 if (_stack_guard_state == stack_guard_unused) return; |
2520 address low_addr = stack_base() - stack_size(); | |
2521 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2522 | |
2523 if (os::allocate_stack_guard_pages()) { | |
1320
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2524 if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
0 | 2525 _stack_guard_state = stack_guard_unused; |
2526 } else { | |
2527 warning("Attempt to deallocate stack guard pages failed."); | |
2528 } | |
2529 } else { | |
2530 if (_stack_guard_state == stack_guard_unused) return; | |
2531 if (os::unguard_memory((char *) low_addr, len)) { | |
2532 _stack_guard_state = stack_guard_unused; | |
2533 } else { | |
2534 warning("Attempt to unprotect stack guard pages failed."); | |
2535 } | |
2536 } | |
2537 } | |
2538 | |
2539 void JavaThread::enable_stack_yellow_zone() { | |
2540 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2541 assert(_stack_guard_state != stack_guard_enabled, "already enabled"); | |
2542 | |
2543 // The base notation is from the stacks point of view, growing downward. | |
2544 // We need to adjust it to work correctly with guard_memory() | |
2545 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2546 | |
2547 guarantee(base < stack_base(),"Error calculating stack yellow zone"); | |
2548 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); | |
2549 | |
2550 if (os::guard_memory((char *) base, stack_yellow_zone_size())) { | |
2551 _stack_guard_state = stack_guard_enabled; | |
2552 } else { | |
2553 warning("Attempt to guard stack yellow zone failed."); | |
2554 } | |
2555 enable_register_stack_guard(); | |
2556 } | |
2557 | |
2558 void JavaThread::disable_stack_yellow_zone() { | |
2559 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2560 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); | |
2561 | |
2562 // Simply return if called for a thread that does not use guard pages. | |
2563 if (_stack_guard_state == stack_guard_unused) return; | |
2564 | |
2565 // The base notation is from the stacks point of view, growing downward. | |
2566 // We need to adjust it to work correctly with guard_memory() | |
2567 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2568 | |
2569 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { | |
2570 _stack_guard_state = stack_guard_yellow_disabled; | |
2571 } else { | |
2572 warning("Attempt to unguard stack yellow zone failed."); | |
2573 } | |
2574 disable_register_stack_guard(); | |
2575 } | |
2576 | |
2577 void JavaThread::enable_stack_red_zone() { | |
2578 // The base notation is from the stacks point of view, growing downward. | |
2579 // We need to adjust it to work correctly with guard_memory() | |
2580 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2581 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2582 | |
2583 guarantee(base < stack_base(),"Error calculating stack red zone"); | |
2584 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); | |
2585 | |
2586 if(!os::guard_memory((char *) base, stack_red_zone_size())) { | |
2587 warning("Attempt to guard stack red zone failed."); | |
2588 } | |
2589 } | |
2590 | |
2591 void JavaThread::disable_stack_red_zone() { | |
2592 // The base notation is from the stacks point of view, growing downward. | |
2593 // We need to adjust it to work correctly with guard_memory() | |
2594 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2595 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2596 if (!os::unguard_memory((char *)base, stack_red_zone_size())) { | |
2597 warning("Attempt to unguard stack red zone failed."); | |
2598 } | |
2599 } | |
2600 | |
2601 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { | |
2602 // ignore is there is no stack | |
2603 if (!has_last_Java_frame()) return; | |
2604 // traverse the stack frames. Starts from top frame. | |
2605 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2606 frame* fr = fst.current(); | |
2607 f(fr, fst.register_map()); | |
2608 } | |
2609 } | |
2610 | |
2611 | |
2612 #ifndef PRODUCT | |
2613 // Deoptimization | |
2614 // Function for testing deoptimization | |
2615 void JavaThread::deoptimize() { | |
2616 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2617 StackFrameStream fst(this, UseBiasedLocking); | |
2618 bool deopt = false; // Dump stack only if a deopt actually happens. | |
2619 bool only_at = strlen(DeoptimizeOnlyAt) > 0; | |
2620 // Iterate over all frames in the thread and deoptimize | |
2621 for(; !fst.is_done(); fst.next()) { | |
2622 if(fst.current()->can_be_deoptimized()) { | |
2623 | |
2624 if (only_at) { | |
2625 // Deoptimize only at particular bcis. DeoptimizeOnlyAt | |
2626 // consists of comma or carriage return separated numbers so | |
2627 // search for the current bci in that string. | |
2628 address pc = fst.current()->pc(); | |
2629 nmethod* nm = (nmethod*) fst.current()->cb(); | |
2630 ScopeDesc* sd = nm->scope_desc_at( pc); | |
2631 char buffer[8]; | |
2632 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); | |
2633 size_t len = strlen(buffer); | |
2634 const char * found = strstr(DeoptimizeOnlyAt, buffer); | |
2635 while (found != NULL) { | |
2636 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && | |
2637 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { | |
2638 // Check that the bci found is bracketed by terminators. | |
2639 break; | |
2640 } | |
2641 found = strstr(found + 1, buffer); | |
2642 } | |
2643 if (!found) { | |
2644 continue; | |
2645 } | |
2646 } | |
2647 | |
2648 if (DebugDeoptimization && !deopt) { | |
2649 deopt = true; // One-time only print before deopt | |
2650 tty->print_cr("[BEFORE Deoptimization]"); | |
2651 trace_frames(); | |
2652 trace_stack(); | |
2653 } | |
2654 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
2655 } | |
2656 } | |
2657 | |
2658 if (DebugDeoptimization && deopt) { | |
2659 tty->print_cr("[AFTER Deoptimization]"); | |
2660 trace_frames(); | |
2661 } | |
2662 } | |
2663 | |
2664 | |
2665 // Make zombies | |
2666 void JavaThread::make_zombies() { | |
2667 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2668 if (fst.current()->can_be_deoptimized()) { | |
2669 // it is a Java nmethod | |
2670 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); | |
2671 nm->make_not_entrant(); | |
2672 } | |
2673 } | |
2674 } | |
2675 #endif // PRODUCT | |
2676 | |
2677 | |
2678 void JavaThread::deoptimized_wrt_marked_nmethods() { | |
2679 if (!has_last_Java_frame()) return; | |
2680 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2681 StackFrameStream fst(this, UseBiasedLocking); | |
2682 for(; !fst.is_done(); fst.next()) { | |
2683 if (fst.current()->should_be_deoptimized()) { | |
6843 | 2684 if (LogCompilation && xtty != NULL) { |
2685 nmethod* nm = fst.current()->cb()->as_nmethod_or_null(); | |
2686 xtty->elem("deoptimized thread='" UINTX_FORMAT "' compile_id='%d'", | |
2687 this->name(), nm != NULL ? nm->compile_id() : -1); | |
2688 } | |
2689 | |
0 | 2690 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
2691 } | |
2692 } | |
2693 } | |
2694 | |
2695 | |
2696 // GC support | |
2697 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } | |
2698 | |
2699 void JavaThread::gc_epilogue() { | |
2700 frames_do(frame_gc_epilogue); | |
2701 } | |
2702 | |
2703 | |
2704 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } | |
2705 | |
2706 void JavaThread::gc_prologue() { | |
2707 frames_do(frame_gc_prologue); | |
2708 } | |
2709 | |
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2710 // If the caller is a NamedThread, then remember, in the current scope, |
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2711 // the given JavaThread in its _processed_thread field. |
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2712 class RememberProcessedThread: public StackObj { |
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|
2713 NamedThread* _cur_thr; |
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|
2714 public: |
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|
2715 RememberProcessedThread(JavaThread* jthr) { |
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|
2716 Thread* thread = Thread::current(); |
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2717 if (thread->is_Named_thread()) { |
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2718 _cur_thr = (NamedThread *)thread; |
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2719 _cur_thr->set_processed_thread(jthr); |
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|
2720 } else { |
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2721 _cur_thr = NULL; |
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|
2722 } |
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|
2723 } |
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|
2724 |
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|
2725 ~RememberProcessedThread() { |
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|
2726 if (_cur_thr) { |
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|
2727 _cur_thr->set_processed_thread(NULL); |
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|
2728 } |
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|
2729 } |
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|
2730 }; |
0 | 2731 |
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2732 void JavaThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
1166 | 2733 // Verify that the deferred card marks have been flushed. |
2734 assert(deferred_card_mark().is_empty(), "Should be empty during GC"); | |
1027
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2735 |
0 | 2736 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
2737 // since there may be more than one thread using each ThreadProfiler. | |
2738 | |
2739 // Traverse the GCHandles | |
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2740 Thread::oops_do(f, cld_f, cf); |
0 | 2741 |
2742 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2743 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2744 | |
2745 if (has_last_Java_frame()) { | |
1119
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2746 // Record JavaThread to GC thread |
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|
2747 RememberProcessedThread rpt(this); |
0 | 2748 |
2749 // Traverse the privileged stack | |
2750 if (_privileged_stack_top != NULL) { | |
2751 _privileged_stack_top->oops_do(f); | |
2752 } | |
2753 | |
2754 // traverse the registered growable array | |
2755 if (_array_for_gc != NULL) { | |
2756 for (int index = 0; index < _array_for_gc->length(); index++) { | |
2757 f->do_oop(_array_for_gc->adr_at(index)); | |
2758 } | |
2759 } | |
2760 | |
2761 // Traverse the monitor chunks | |
2762 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2763 chunk->oops_do(f); | |
2764 } | |
2765 | |
2766 // Traverse the execution stack | |
2767 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
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2768 fst.current()->oops_do(f, cld_f, cf, fst.register_map()); |
0 | 2769 } |
2770 } | |
2771 | |
2772 // callee_target is never live across a gc point so NULL it here should | |
2773 // it still contain a methdOop. | |
2774 | |
2775 set_callee_target(NULL); | |
2776 | |
2777 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); | |
2778 // If we have deferred set_locals there might be oops waiting to be | |
2779 // written | |
2780 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); | |
2781 if (list != NULL) { | |
2782 for (int i = 0; i < list->length(); i++) { | |
2783 list->at(i)->oops_do(f); | |
2784 } | |
2785 } | |
2786 | |
2787 // Traverse instance variables at the end since the GC may be moving things | |
2788 // around using this function | |
2789 f->do_oop((oop*) &_threadObj); | |
2790 f->do_oop((oop*) &_vm_result); | |
2791 f->do_oop((oop*) &_exception_oop); | |
2792 f->do_oop((oop*) &_pending_async_exception); | |
2793 | |
2794 if (jvmti_thread_state() != NULL) { | |
2795 jvmti_thread_state()->oops_do(f); | |
2796 } | |
2797 } | |
2798 | |
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2799 void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
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2800 Thread::nmethods_do(cf); // (super method is a no-op) |
0 | 2801 |
2802 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2803 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2804 | |
2805 if (has_last_Java_frame()) { | |
2806 // Traverse the execution stack | |
2807 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
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|
2808 fst.current()->nmethods_do(cf); |
0 | 2809 } |
2810 } | |
2811 } | |
2812 | |
6725
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2813 void JavaThread::metadata_do(void f(Metadata*)) { |
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|
2814 Thread::metadata_do(f); |
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|
2815 if (has_last_Java_frame()) { |
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|
2816 // Traverse the execution stack to call f() on the methods in the stack |
da91efe96a93
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|
2817 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
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2818 fst.current()->metadata_do(f); |
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2819 } |
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2820 } else if (is_Compiler_thread()) { |
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2821 // need to walk ciMetadata in current compile tasks to keep alive. |
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2822 CompilerThread* ct = (CompilerThread*)this; |
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2823 if (ct->env() != NULL) { |
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2824 ct->env()->metadata_do(f); |
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2825 } |
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2826 } |
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2827 } |
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2828 |
0 | 2829 // Printing |
2830 const char* _get_thread_state_name(JavaThreadState _thread_state) { | |
2831 switch (_thread_state) { | |
2832 case _thread_uninitialized: return "_thread_uninitialized"; | |
2833 case _thread_new: return "_thread_new"; | |
2834 case _thread_new_trans: return "_thread_new_trans"; | |
2835 case _thread_in_native: return "_thread_in_native"; | |
2836 case _thread_in_native_trans: return "_thread_in_native_trans"; | |
2837 case _thread_in_vm: return "_thread_in_vm"; | |
2838 case _thread_in_vm_trans: return "_thread_in_vm_trans"; | |
2839 case _thread_in_Java: return "_thread_in_Java"; | |
2840 case _thread_in_Java_trans: return "_thread_in_Java_trans"; | |
2841 case _thread_blocked: return "_thread_blocked"; | |
2842 case _thread_blocked_trans: return "_thread_blocked_trans"; | |
2843 default: return "unknown thread state"; | |
2844 } | |
2845 } | |
2846 | |
2847 #ifndef PRODUCT | |
2848 void JavaThread::print_thread_state_on(outputStream *st) const { | |
2849 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); | |
2850 }; | |
2851 void JavaThread::print_thread_state() const { | |
2852 print_thread_state_on(tty); | |
2853 }; | |
2854 #endif // PRODUCT | |
2855 | |
2856 // Called by Threads::print() for VM_PrintThreads operation | |
2857 void JavaThread::print_on(outputStream *st) const { | |
2858 st->print("\"%s\" ", get_thread_name()); | |
2859 oop thread_oop = threadObj(); | |
6766 | 2860 if (thread_oop != NULL) { |
2861 st->print("#" INT64_FORMAT " ", java_lang_Thread::thread_id(thread_oop)); | |
2862 if (java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); | |
2863 st->print("prio=%d ", java_lang_Thread::priority(thread_oop)); | |
2864 } | |
0 | 2865 Thread::print_on(st); |
2866 // print guess for valid stack memory region (assume 4K pages); helps lock debugging | |
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2867 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
0 | 2868 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
2869 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); | |
2870 } | |
2871 #ifndef PRODUCT | |
2872 print_thread_state_on(st); | |
2873 _safepoint_state->print_on(st); | |
2874 #endif // PRODUCT | |
2875 } | |
2876 | |
2877 // Called by fatal error handler. The difference between this and | |
2878 // JavaThread::print() is that we can't grab lock or allocate memory. | |
2879 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { | |
2880 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); | |
2881 oop thread_obj = threadObj(); | |
2882 if (thread_obj != NULL) { | |
2883 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); | |
2884 } | |
2885 st->print(" ["); | |
2886 st->print("%s", _get_thread_state_name(_thread_state)); | |
2887 if (osthread()) { | |
2888 st->print(", id=%d", osthread()->thread_id()); | |
2889 } | |
2890 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", | |
2891 _stack_base - _stack_size, _stack_base); | |
2892 st->print("]"); | |
2893 return; | |
2894 } | |
2895 | |
2896 // Verification | |
2897 | |
2898 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } | |
2899 | |
2900 void JavaThread::verify() { | |
2901 // Verify oops in the thread. | |
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2902 oops_do(&VerifyOopClosure::verify_oop, NULL, NULL); |
0 | 2903 |
2904 // Verify the stack frames. | |
2905 frames_do(frame_verify); | |
2906 } | |
2907 | |
2908 // CR 6300358 (sub-CR 2137150) | |
2909 // Most callers of this method assume that it can't return NULL but a | |
2910 // thread may not have a name whilst it is in the process of attaching to | |
2911 // the VM - see CR 6412693, and there are places where a JavaThread can be | |
2912 // seen prior to having it's threadObj set (eg JNI attaching threads and | |
2913 // if vm exit occurs during initialization). These cases can all be accounted | |
2914 // for such that this method never returns NULL. | |
2915 const char* JavaThread::get_thread_name() const { | |
2916 #ifdef ASSERT | |
2917 // early safepoints can hit while current thread does not yet have TLS | |
2918 if (!SafepointSynchronize::is_at_safepoint()) { | |
2919 Thread *cur = Thread::current(); | |
2920 if (!(cur->is_Java_thread() && cur == this)) { | |
2921 // Current JavaThreads are allowed to get their own name without | |
2922 // the Threads_lock. | |
2923 assert_locked_or_safepoint(Threads_lock); | |
2924 } | |
2925 } | |
2926 #endif // ASSERT | |
2927 return get_thread_name_string(); | |
2928 } | |
2929 | |
2930 // Returns a non-NULL representation of this thread's name, or a suitable | |
2931 // descriptive string if there is no set name | |
2932 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { | |
2933 const char* name_str; | |
2934 oop thread_obj = threadObj(); | |
2935 if (thread_obj != NULL) { | |
2936 typeArrayOop name = java_lang_Thread::name(thread_obj); | |
2937 if (name != NULL) { | |
2938 if (buf == NULL) { | |
2939 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2940 } | |
2941 else { | |
2942 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); | |
2943 } | |
2944 } | |
4006 | 2945 else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
0 | 2946 name_str = "<no-name - thread is attaching>"; |
2947 } | |
2948 else { | |
2949 name_str = Thread::name(); | |
2950 } | |
2951 } | |
2952 else { | |
2953 name_str = Thread::name(); | |
2954 } | |
2955 assert(name_str != NULL, "unexpected NULL thread name"); | |
2956 return name_str; | |
2957 } | |
2958 | |
2959 | |
2960 const char* JavaThread::get_threadgroup_name() const { | |
2961 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
2962 oop thread_obj = threadObj(); | |
2963 if (thread_obj != NULL) { | |
2964 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
2965 if (thread_group != NULL) { | |
2966 typeArrayOop name = java_lang_ThreadGroup::name(thread_group); | |
2967 // ThreadGroup.name can be null | |
2968 if (name != NULL) { | |
2969 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2970 return str; | |
2971 } | |
2972 } | |
2973 } | |
2974 return NULL; | |
2975 } | |
2976 | |
2977 const char* JavaThread::get_parent_name() const { | |
2978 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
2979 oop thread_obj = threadObj(); | |
2980 if (thread_obj != NULL) { | |
2981 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
2982 if (thread_group != NULL) { | |
2983 oop parent = java_lang_ThreadGroup::parent(thread_group); | |
2984 if (parent != NULL) { | |
2985 typeArrayOop name = java_lang_ThreadGroup::name(parent); | |
2986 // ThreadGroup.name can be null | |
2987 if (name != NULL) { | |
2988 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2989 return str; | |
2990 } | |
2991 } | |
2992 } | |
2993 } | |
2994 return NULL; | |
2995 } | |
2996 | |
2997 ThreadPriority JavaThread::java_priority() const { | |
2998 oop thr_oop = threadObj(); | |
2999 if (thr_oop == NULL) return NormPriority; // Bootstrapping | |
3000 ThreadPriority priority = java_lang_Thread::priority(thr_oop); | |
3001 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
3002 return priority; | |
3003 } | |
3004 | |
3005 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { | |
3006 | |
3007 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
3008 // Link Java Thread object <-> C++ Thread | |
3009 | |
3010 // Get the C++ thread object (an oop) from the JNI handle (a jthread) | |
3011 // and put it into a new Handle. The Handle "thread_oop" can then | |
3012 // be used to pass the C++ thread object to other methods. | |
3013 | |
3014 // Set the Java level thread object (jthread) field of the | |
3015 // new thread (a JavaThread *) to C++ thread object using the | |
3016 // "thread_oop" handle. | |
3017 | |
3018 // Set the thread field (a JavaThread *) of the | |
3019 // oop representing the java_lang_Thread to the new thread (a JavaThread *). | |
3020 | |
3021 Handle thread_oop(Thread::current(), | |
3022 JNIHandles::resolve_non_null(jni_thread)); | |
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3023 assert(InstanceKlass::cast(thread_oop->klass())->is_linked(), |
0 | 3024 "must be initialized"); |
3025 set_threadObj(thread_oop()); | |
3026 java_lang_Thread::set_thread(thread_oop(), this); | |
3027 | |
3028 if (prio == NoPriority) { | |
3029 prio = java_lang_Thread::priority(thread_oop()); | |
3030 assert(prio != NoPriority, "A valid priority should be present"); | |
3031 } | |
3032 | |
3033 // Push the Java priority down to the native thread; needs Threads_lock | |
3034 Thread::set_priority(this, prio); | |
3035 | |
3036 // Add the new thread to the Threads list and set it in motion. | |
3037 // We must have threads lock in order to call Threads::add. | |
3038 // It is crucial that we do not block before the thread is | |
3039 // added to the Threads list for if a GC happens, then the java_thread oop | |
3040 // will not be visited by GC. | |
3041 Threads::add(this); | |
3042 } | |
3043 | |
3044 oop JavaThread::current_park_blocker() { | |
3045 // Support for JSR-166 locks | |
3046 oop thread_oop = threadObj(); | |
242 | 3047 if (thread_oop != NULL && |
3048 JDK_Version::current().supports_thread_park_blocker()) { | |
0 | 3049 return java_lang_Thread::park_blocker(thread_oop); |
3050 } | |
3051 return NULL; | |
3052 } | |
3053 | |
3054 | |
3055 void JavaThread::print_stack_on(outputStream* st) { | |
3056 if (!has_last_Java_frame()) return; | |
3057 ResourceMark rm; | |
3058 HandleMark hm; | |
3059 | |
3060 RegisterMap reg_map(this); | |
3061 vframe* start_vf = last_java_vframe(®_map); | |
3062 int count = 0; | |
3063 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3064 if (f->is_java_frame()) { | |
3065 javaVFrame* jvf = javaVFrame::cast(f); | |
3066 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); | |
3067 | |
3068 // Print out lock information | |
3069 if (JavaMonitorsInStackTrace) { | |
3070 jvf->print_lock_info_on(st, count); | |
3071 } | |
3072 } else { | |
3073 // Ignore non-Java frames | |
3074 } | |
3075 | |
3076 // Bail-out case for too deep stacks | |
3077 count++; | |
3078 if (MaxJavaStackTraceDepth == count) return; | |
3079 } | |
3080 } | |
3081 | |
3082 | |
3083 // JVMTI PopFrame support | |
3084 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { | |
3085 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); | |
3086 if (in_bytes(size_in_bytes) != 0) { | |
6197 | 3087 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes), mtThread); |
0 | 3088 _popframe_preserved_args_size = in_bytes(size_in_bytes); |
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3089 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
0 | 3090 } |
3091 } | |
3092 | |
3093 void* JavaThread::popframe_preserved_args() { | |
3094 return _popframe_preserved_args; | |
3095 } | |
3096 | |
3097 ByteSize JavaThread::popframe_preserved_args_size() { | |
3098 return in_ByteSize(_popframe_preserved_args_size); | |
3099 } | |
3100 | |
3101 WordSize JavaThread::popframe_preserved_args_size_in_words() { | |
3102 int sz = in_bytes(popframe_preserved_args_size()); | |
3103 assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); | |
3104 return in_WordSize(sz / wordSize); | |
3105 } | |
3106 | |
3107 void JavaThread::popframe_free_preserved_args() { | |
3108 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); | |
6197 | 3109 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args, mtThread); |
0 | 3110 _popframe_preserved_args = NULL; |
3111 _popframe_preserved_args_size = 0; | |
3112 } | |
3113 | |
3114 #ifndef PRODUCT | |
3115 | |
3116 void JavaThread::trace_frames() { | |
3117 tty->print_cr("[Describe stack]"); | |
3118 int frame_no = 1; | |
3119 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
3120 tty->print(" %d. ", frame_no++); | |
3121 fst.current()->print_value_on(tty,this); | |
3122 tty->cr(); | |
3123 } | |
3124 } | |
3125 | |
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3126 class PrintAndVerifyOopClosure: public OopClosure { |
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3127 protected: |
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3128 template <class T> inline void do_oop_work(T* p) { |
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3129 oop obj = oopDesc::load_decode_heap_oop(p); |
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3130 if (obj == NULL) return; |
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3131 tty->print(INTPTR_FORMAT ": ", p); |
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3132 if (obj->is_oop_or_null()) { |
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3133 if (obj->is_objArray()) { |
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3134 tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
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3135 } else { |
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3136 obj->print(); |
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3137 } |
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3138 } else { |
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3139 tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj); |
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3140 } |
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3141 tty->cr(); |
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3142 } |
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3143 public: |
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3144 virtual void do_oop(oop* p) { do_oop_work(p); } |
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3145 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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3146 }; |
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3147 |
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3148 |
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3149 static void oops_print(frame* f, const RegisterMap *map) { |
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3150 PrintAndVerifyOopClosure print; |
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3151 f->print_value(); |
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3152 f->oops_do(&print, NULL, NULL, (RegisterMap*)map); |
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3153 } |
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3154 |
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3155 // Print our all the locations that contain oops and whether they are |
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3156 // valid or not. This useful when trying to find the oldest frame |
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3157 // where an oop has gone bad since the frame walk is from youngest to |
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3158 // oldest. |
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3159 void JavaThread::trace_oops() { |
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3160 tty->print_cr("[Trace oops]"); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3161 frames_do(oops_print); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3162 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3163 |
0 | 3164 |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3165 #ifdef ASSERT |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3166 // 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
|
3167 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
|
3168 ResourceMark rm; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3169 PRESERVE_EXCEPTION_MARK; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3170 FrameValues values; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3171 int frame_no = 0; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3172 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
|
3173 fst.current()->describe(values, ++frame_no); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3174 if (depth == frame_no) break; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3175 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3176 if (validate_only) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3177 values.validate(); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3178 } else { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3179 tty->print_cr("[Describe stack layout]"); |
4042
b20d64f83668
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
4007
diff
changeset
|
3180 values.print(this); |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3181 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3182 } |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3183 #endif |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3184 |
0 | 3185 void JavaThread::trace_stack_from(vframe* start_vf) { |
3186 ResourceMark rm; | |
3187 int vframe_no = 1; | |
3188 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3189 if (f->is_java_frame()) { | |
3190 javaVFrame::cast(f)->print_activation(vframe_no++); | |
3191 } else { | |
3192 f->print(); | |
3193 } | |
3194 if (vframe_no > StackPrintLimit) { | |
3195 tty->print_cr("...<more frames>..."); | |
3196 return; | |
3197 } | |
3198 } | |
3199 } | |
3200 | |
3201 | |
3202 void JavaThread::trace_stack() { | |
3203 if (!has_last_Java_frame()) return; | |
3204 ResourceMark rm; | |
3205 HandleMark hm; | |
3206 RegisterMap reg_map(this); | |
3207 trace_stack_from(last_java_vframe(®_map)); | |
3208 } | |
3209 | |
3210 | |
3211 #endif // PRODUCT | |
3212 | |
3213 | |
3214 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { | |
3215 assert(reg_map != NULL, "a map must be given"); | |
3216 frame f = last_frame(); | |
3217 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { | |
3218 if (vf->is_java_frame()) return javaVFrame::cast(vf); | |
3219 } | |
3220 return NULL; | |
3221 } | |
3222 | |
3223 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3224 Klass* JavaThread::security_get_caller_class(int depth) { |
0 | 3225 vframeStream vfst(this); |
3226 vfst.security_get_caller_frame(depth); | |
3227 if (!vfst.at_end()) { | |
3228 return vfst.method()->method_holder(); | |
3229 } | |
3230 return NULL; | |
3231 } | |
3232 | |
3233 static void compiler_thread_entry(JavaThread* thread, TRAPS) { | |
3234 assert(thread->is_Compiler_thread(), "must be compiler thread"); | |
3235 CompileBroker::compiler_thread_loop(); | |
3236 } | |
3237 | |
3238 // Create a CompilerThread | |
3239 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) | |
3240 : JavaThread(&compiler_thread_entry) { | |
3241 _env = NULL; | |
3242 _log = NULL; | |
3243 _task = NULL; | |
3244 _queue = queue; | |
3245 _counters = counters; | |
1584 | 3246 _buffer_blob = NULL; |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3247 _scanned_nmethod = NULL; |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3248 _compiler = NULL; |
0 | 3249 |
3250 #ifndef PRODUCT | |
3251 _ideal_graph_printer = NULL; | |
3252 #endif | |
3253 } | |
3254 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3255 void CompilerThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3256 JavaThread::oops_do(f, cld_f, cf); |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3257 if (_scanned_nmethod != NULL && cf != NULL) { |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3258 // 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
|
3259 // 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
|
3260 // a scan. |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3261 cf->do_code_blob(_scanned_nmethod); |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3262 } |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3263 } |
0 | 3264 |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3265 |
0 | 3266 // ======= Threads ======== |
3267 | |
3268 // The Threads class links together all active threads, and provides | |
3269 // operations over all threads. It is protected by its own Mutex | |
3270 // lock, which is also used in other contexts to protect thread | |
3271 // operations from having the thread being operated on from exiting | |
3272 // and going away unexpectedly (e.g., safepoint synchronization) | |
3273 | |
3274 JavaThread* Threads::_thread_list = NULL; | |
3275 int Threads::_number_of_threads = 0; | |
3276 int Threads::_number_of_non_daemon_threads = 0; | |
3277 int Threads::_return_code = 0; | |
3278 size_t JavaThread::_stack_size_at_create = 0; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3279 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3280 bool Threads::_vm_complete = false; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3281 #endif |
0 | 3282 |
3283 // All JavaThreads | |
3284 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) | |
3285 | |
3286 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system) | |
3287 void Threads::threads_do(ThreadClosure* tc) { | |
3288 assert_locked_or_safepoint(Threads_lock); | |
3289 // ALL_JAVA_THREADS iterates through all JavaThreads | |
3290 ALL_JAVA_THREADS(p) { | |
3291 tc->do_thread(p); | |
3292 } | |
3293 // Someday we could have a table or list of all non-JavaThreads. | |
3294 // For now, just manually iterate through them. | |
3295 tc->do_thread(VMThread::vm_thread()); | |
3296 Universe::heap()->gc_threads_do(tc); | |
323
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3297 WatcherThread *wt = WatcherThread::watcher_thread(); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3298 // 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
|
3299 // 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
|
3300 // 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
|
3301 // 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
|
3302 // way to prevent termination of WatcherThread would be to acquire |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3303 // 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
|
3304 // checking in some cases. |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3305 if (wt != NULL) |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3306 tc->do_thread(wt); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3307 |
0 | 3308 // If CompilerThreads ever become non-JavaThreads, add them here |
3309 } | |
3310 | |
3311 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { | |
3312 | |
242 | 3313 extern void JDK_Version_init(); |
3314 | |
0 | 3315 // Check version |
3316 if (!is_supported_jni_version(args->version)) return JNI_EVERSION; | |
3317 | |
3318 // Initialize the output stream module | |
3319 ostream_init(); | |
3320 | |
3321 // Process java launcher properties. | |
3322 Arguments::process_sun_java_launcher_properties(args); | |
3323 | |
3324 // Initialize the os module before using TLS | |
3325 os::init(); | |
3326 | |
3327 // Initialize system properties. | |
3328 Arguments::init_system_properties(); | |
3329 | |
242 | 3330 // So that JDK version can be used as a discrimintor when parsing arguments |
3331 JDK_Version_init(); | |
3332 | |
1864
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3333 // Update/Initialize System properties after JDK version number is known |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3334 Arguments::init_version_specific_system_properties(); |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3335 |
0 | 3336 // Parse arguments |
3337 jint parse_result = Arguments::parse(args); | |
3338 if (parse_result != JNI_OK) return parse_result; | |
3339 | |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3340 os::init_before_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3341 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3342 jint ergo_result = Arguments::apply_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3343 if (ergo_result != JNI_OK) return ergo_result; |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3344 |
0 | 3345 if (PauseAtStartup) { |
3346 os::pause(); | |
3347 } | |
3348 | |
4006 | 3349 #ifndef USDT2 |
0 | 3350 HS_DTRACE_PROBE(hotspot, vm__init__begin); |
4006 | 3351 #else /* USDT2 */ |
3352 HOTSPOT_VM_INIT_BEGIN(); | |
3353 #endif /* USDT2 */ | |
0 | 3354 |
3355 // Record VM creation timing statistics | |
3356 TraceVmCreationTime create_vm_timer; | |
3357 create_vm_timer.start(); | |
3358 | |
3359 // Timing (must come after argument parsing) | |
3360 TraceTime timer("Create VM", TraceStartupTime); | |
3361 | |
3362 // Initialize the os module after parsing the args | |
3363 jint os_init_2_result = os::init_2(); | |
3364 if (os_init_2_result != JNI_OK) return os_init_2_result; | |
3365 | |
7177
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3366 jint adjust_after_os_result = Arguments::adjust_after_os(); |
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3367 if (adjust_after_os_result != JNI_OK) return adjust_after_os_result; |
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3368 |
6197 | 3369 // intialize TLS |
3370 ThreadLocalStorage::init(); | |
3371 | |
3372 // Bootstrap native memory tracking, so it can start recording memory | |
3373 // activities before worker thread is started. This is the first phase | |
3374 // of bootstrapping, VM is currently running in single-thread mode. | |
3375 MemTracker::bootstrap_single_thread(); | |
3376 | |
0 | 3377 // Initialize output stream logging |
3378 ostream_init_log(); | |
3379 | |
3380 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad | |
3381 // Must be before create_vm_init_agents() | |
3382 if (Arguments::init_libraries_at_startup()) { | |
3383 convert_vm_init_libraries_to_agents(); | |
3384 } | |
3385 | |
3386 // Launch -agentlib/-agentpath and converted -Xrun agents | |
3387 if (Arguments::init_agents_at_startup()) { | |
3388 create_vm_init_agents(); | |
3389 } | |
3390 | |
3391 // Initialize Threads state | |
3392 _thread_list = NULL; | |
3393 _number_of_threads = 0; | |
3394 _number_of_non_daemon_threads = 0; | |
3395 | |
3396 // Initialize global data structures and create system classes in heap | |
3397 vm_init_globals(); | |
3398 | |
3399 // Attach the main thread to this os thread | |
3400 JavaThread* main_thread = new JavaThread(); | |
3401 main_thread->set_thread_state(_thread_in_vm); | |
3402 // must do this before set_active_handles and initialize_thread_local_storage | |
3403 // Note: on solaris initialize_thread_local_storage() will (indirectly) | |
3404 // change the stack size recorded here to one based on the java thread | |
3405 // stacksize. This adjusted size is what is used to figure the placement | |
3406 // of the guard pages. | |
3407 main_thread->record_stack_base_and_size(); | |
3408 main_thread->initialize_thread_local_storage(); | |
3409 | |
3410 main_thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
3411 | |
3412 if (!main_thread->set_as_starting_thread()) { | |
3413 vm_shutdown_during_initialization( | |
3414 "Failed necessary internal allocation. Out of swap space"); | |
3415 delete main_thread; | |
3416 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3417 return JNI_ENOMEM; | |
3418 } | |
3419 | |
3420 // Enable guard page *after* os::create_main_thread(), otherwise it would | |
3421 // crash Linux VM, see notes in os_linux.cpp. | |
3422 main_thread->create_stack_guard_pages(); | |
3423 | |
1878 | 3424 // Initialize Java-Level synchronization subsystem |
3425 ObjectMonitor::Initialize() ; | |
0 | 3426 |
6197 | 3427 // Second phase of bootstrapping, VM is about entering multi-thread mode |
3428 MemTracker::bootstrap_multi_thread(); | |
3429 | |
0 | 3430 // Initialize global modules |
3431 jint status = init_globals(); | |
3432 if (status != JNI_OK) { | |
3433 delete main_thread; | |
3434 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3435 return status; | |
3436 } | |
3437 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3438 // Should be done after the heap is fully created |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3439 main_thread->cache_global_variables(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3440 |
0 | 3441 HandleMark hm; |
3442 | |
3443 { MutexLocker mu(Threads_lock); | |
3444 Threads::add(main_thread); | |
3445 } | |
3446 | |
3447 // Any JVMTI raw monitors entered in onload will transition into | |
3448 // real raw monitor. VM is setup enough here for raw monitor enter. | |
3449 JvmtiExport::transition_pending_onload_raw_monitors(); | |
3450 | |
6197 | 3451 // Fully start NMT |
3452 MemTracker::start(); | |
3453 | |
0 | 3454 // Create the VMThread |
3455 { TraceTime timer("Start VMThread", TraceStartupTime); | |
3456 VMThread::create(); | |
3457 Thread* vmthread = VMThread::vm_thread(); | |
3458 | |
3459 if (!os::create_thread(vmthread, os::vm_thread)) | |
3460 vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); | |
3461 | |
3462 // Wait for the VM thread to become ready, and VMThread::run to initialize | |
3463 // Monitors can have spurious returns, must always check another state flag | |
3464 { | |
3465 MutexLocker ml(Notify_lock); | |
3466 os::start_thread(vmthread); | |
3467 while (vmthread->active_handles() == NULL) { | |
3468 Notify_lock->wait(); | |
3469 } | |
3470 } | |
3471 } | |
3472 | |
3473 assert (Universe::is_fully_initialized(), "not initialized"); | |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3474 if (VerifyDuringStartup) { |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9071
diff
changeset
|
3475 // Make sure we're starting with a clean slate. |
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9071
diff
changeset
|
3476 VM_Verify verify_op; |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3477 VMThread::execute(&verify_op); |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3478 } |
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3479 |
0 | 3480 EXCEPTION_MARK; |
3481 | |
3482 // At this point, the Universe is initialized, but we have not executed | |
3483 // any byte code. Now is a good time (the only time) to dump out the | |
3484 // internal state of the JVM for sharing. | |
3485 if (DumpSharedSpaces) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3486 MetaspaceShared::preload_and_dump(CHECK_0); |
0 | 3487 ShouldNotReachHere(); |
3488 } | |
3489 | |
3490 // Always call even when there are not JVMTI environments yet, since environments | |
3491 // may be attached late and JVMTI must track phases of VM execution | |
3492 JvmtiExport::enter_start_phase(); | |
3493 | |
3494 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. | |
3495 JvmtiExport::post_vm_start(); | |
3496 | |
3497 { | |
3498 TraceTime timer("Initialize java.lang classes", TraceStartupTime); | |
3499 | |
3500 if (EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3501 create_vm_init_libraries(); | |
3502 } | |
3503 | |
7608 | 3504 initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
0 | 3505 |
3506 // Initialize java_lang.System (needed before creating the thread) | |
7608 | 3507 initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
3508 initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); | |
3509 Handle thread_group = create_initial_thread_group(CHECK_0); | |
3510 Universe::set_main_thread_group(thread_group()); | |
3511 initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); | |
3512 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); | |
3513 main_thread->set_threadObj(thread_object); | |
3514 // Set thread status to running since main thread has | |
3515 // been started and running. | |
3516 java_lang_Thread::set_thread_status(thread_object, | |
3517 java_lang_Thread::RUNNABLE); | |
3518 | |
3519 // The VM creates & returns objects of this class. Make sure it's initialized. | |
3520 initialize_class(vmSymbols::java_lang_Class(), CHECK_0); | |
3521 | |
3522 // The VM preresolves methods to these classes. Make sure that they get initialized | |
3523 initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); | |
3524 initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); | |
3525 call_initializeSystemClass(CHECK_0); | |
3526 | |
3527 // get the Java runtime name after java.lang.System is initialized | |
3528 JDK_Version::set_runtime_name(get_java_runtime_name(THREAD)); | |
3529 JDK_Version::set_runtime_version(get_java_runtime_version(THREAD)); | |
0 | 3530 |
3531 // an instance of OutOfMemory exception has been allocated earlier | |
7608 | 3532 initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
3533 initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); | |
3534 initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); | |
3535 initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); | |
3536 initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); | |
3537 initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); | |
3538 initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); | |
3539 initialize_class(vmSymbols::java_lang_IllegalArgumentException(), CHECK_0); | |
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2376
diff
changeset
|
3540 } |
0 | 3541 |
3542 // See : bugid 4211085. | |
3543 // Background : the static initializer of java.lang.Compiler tries to read | |
3544 // property"java.compiler" and read & write property "java.vm.info". | |
3545 // When a security manager is installed through the command line | |
3546 // option "-Djava.security.manager", the above properties are not | |
3547 // readable and the static initializer for java.lang.Compiler fails | |
3548 // resulting in a NoClassDefFoundError. This can happen in any | |
3549 // user code which calls methods in java.lang.Compiler. | |
3550 // Hack : the hack is to pre-load and initialize this class, so that only | |
3551 // system domains are on the stack when the properties are read. | |
3552 // Currently even the AWT code has calls to methods in java.lang.Compiler. | |
3553 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT. | |
3554 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and | |
3555 // read and write"java.vm.info" in the default policy file. See bugid 4211383 | |
3556 // 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
|
3557 initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
0 | 3558 |
3559 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to | |
3560 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot | |
3561 // compiler does not get loaded through java.lang.Compiler). "java -version" with the | |
3562 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here. | |
3563 // This should also be taken out as soon as 4211383 gets fixed. | |
3564 reset_vm_info_property(CHECK_0); | |
3565 | |
3566 quicken_jni_functions(); | |
3567 | |
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3568 // Must be run after init_ft which initializes ft_enabled |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3569 if (TRACE_INITIALIZE() != JNI_OK) { |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3570 vm_exit_during_initialization("Failed to initialize tracing backend"); |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3571 } |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3572 |
0 | 3573 // Set flag that basic initialization has completed. Used by exceptions and various |
3574 // debug stuff, that does not work until all basic classes have been initialized. | |
3575 set_init_completed(); | |
3576 | |
4006 | 3577 #ifndef USDT2 |
0 | 3578 HS_DTRACE_PROBE(hotspot, vm__init__end); |
4006 | 3579 #else /* USDT2 */ |
3580 HOTSPOT_VM_INIT_END(); | |
3581 #endif /* USDT2 */ | |
0 | 3582 |
3583 // record VM initialization completion time | |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3584 #if INCLUDE_MANAGEMENT |
0 | 3585 Management::record_vm_init_completed(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3586 #endif // INCLUDE_MANAGEMENT |
0 | 3587 |
3588 // Compute system loader. Note that this has to occur after set_init_completed, since | |
3589 // valid exceptions may be thrown in the process. | |
3590 // Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and | |
3591 // set_init_completed has just been called, causing exceptions not to be shortcut | |
3592 // anymore. We call vm_exit_during_initialization directly instead. | |
3593 SystemDictionary::compute_java_system_loader(THREAD); | |
3594 if (HAS_PENDING_EXCEPTION) { | |
3595 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3596 } | |
3597 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3598 #if INCLUDE_ALL_GCS |
0 | 3599 // Support for ConcurrentMarkSweep. This should be cleaned up |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3600 // 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
|
3601 // once things are properly refactored. XXX YSR |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3602 if (UseConcMarkSweepGC || UseG1GC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3603 if (UseConcMarkSweepGC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3604 ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3605 } else { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3606 ConcurrentMarkThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3607 } |
0 | 3608 if (HAS_PENDING_EXCEPTION) { |
3609 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3610 } | |
3611 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3612 #endif // INCLUDE_ALL_GCS |
0 | 3613 |
3614 // Always call even when there are not JVMTI environments yet, since environments | |
3615 // may be attached late and JVMTI must track phases of VM execution | |
3616 JvmtiExport::enter_live_phase(); | |
3617 | |
3618 // Signal Dispatcher needs to be started before VMInit event is posted | |
3619 os::signal_init(); | |
3620 | |
3621 // Start Attach Listener if +StartAttachListener or it can't be started lazily | |
3622 if (!DisableAttachMechanism) { | |
11139
2e8f19c2feef
7162400: Intermittent java.io.IOException: Bad file number during HotSpotVirtualMachine.executeCommand
allwin
parents:
11136
diff
changeset
|
3623 AttachListener::vm_start(); |
0 | 3624 if (StartAttachListener || AttachListener::init_at_startup()) { |
3625 AttachListener::init(); | |
3626 } | |
3627 } | |
3628 | |
3629 // Launch -Xrun agents | |
3630 // Must be done in the JVMTI live phase so that for backward compatibility the JDWP | |
3631 // back-end can launch with -Xdebug -Xrunjdwp. | |
3632 if (!EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3633 create_vm_init_libraries(); | |
3634 } | |
3635 | |
6002
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3636 // Notify JVMTI agents that VM initialization is complete - nop if no agents. |
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3637 JvmtiExport::post_vm_initialized(); |
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3638 |
10405 | 3639 if (TRACE_START() != JNI_OK) { |
3640 vm_exit_during_initialization("Failed to start tracing backend."); | |
4800
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3641 } |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3642 |
3799
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3643 if (CleanChunkPoolAsync) { |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3644 Chunk::start_chunk_pool_cleaner_task(); |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3645 } |
0 | 3646 |
3647 // initialize compiler(s) | |
7195 | 3648 #if defined(COMPILER1) || defined(COMPILER2) || defined(SHARK) |
0 | 3649 CompileBroker::compilation_init(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3650 #endif |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3651 |
12163
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3652 if (EnableInvokeDynamic) { |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3653 // Pre-initialize some JSR292 core classes to avoid deadlock during class loading. |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3654 // It is done after compilers are initialized, because otherwise compilations of |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3655 // signature polymorphic MH intrinsics can be missed |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3656 // (see SystemDictionary::find_method_handle_intrinsic). |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3657 initialize_class(vmSymbols::java_lang_invoke_MethodHandle(), CHECK_0); |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3658 initialize_class(vmSymbols::java_lang_invoke_MemberName(), CHECK_0); |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3659 initialize_class(vmSymbols::java_lang_invoke_MethodHandleNatives(), CHECK_0); |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3660 } |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3661 |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3662 #if INCLUDE_MANAGEMENT |
0 | 3663 Management::initialize(THREAD); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3664 #endif // INCLUDE_MANAGEMENT |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3665 |
0 | 3666 if (HAS_PENDING_EXCEPTION) { |
3667 // management agent fails to start possibly due to | |
3668 // configuration problem and is responsible for printing | |
3669 // stack trace if appropriate. Simply exit VM. | |
3670 vm_exit(1); | |
3671 } | |
3672 | |
3673 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); | |
3674 if (MemProfiling) MemProfiler::engage(); | |
3675 StatSampler::engage(); | |
3676 if (CheckJNICalls) JniPeriodicChecker::engage(); | |
3677 | |
3678 BiasedLocking::init(); | |
3679 | |
17780 | 3680 #if INCLUDE_RTM_OPT |
3681 RTMLockingCounters::init(); | |
3682 #endif | |
3683 | |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3684 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
|
3685 call_postVMInitHook(THREAD); |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3686 // 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
|
3687 // exceptions and provide means of diagnosis. |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3688 if (HAS_PENDING_EXCEPTION) { |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3689 CLEAR_PENDING_EXCEPTION; |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3690 } |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3691 } |
0 | 3692 |
6939
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3693 { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3694 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3695 // Make sure the watcher thread can be started by WatcherThread::start() |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3696 // or by dynamic enrollment. |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3697 WatcherThread::make_startable(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3698 // Start up the WatcherThread if there are any periodic tasks |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3699 // NOTE: All PeriodicTasks should be registered by now. If they |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3700 // aren't, late joiners might appear to start slowly (we might |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3701 // take a while to process their first tick). |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3702 if (PeriodicTask::num_tasks() > 0) { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3703 WatcherThread::start(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3704 } |
0 | 3705 } |
3706 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3707 // Give os specific code one last chance to start |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3708 os::init_3(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3709 |
0 | 3710 create_vm_timer.end(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3711 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3712 _vm_complete = true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3713 #endif |
0 | 3714 return JNI_OK; |
3715 } | |
3716 | |
3717 // type for the Agent_OnLoad and JVM_OnLoad entry points | |
3718 extern "C" { | |
3719 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); | |
3720 } | |
3721 // Find a command line agent library and return its entry point for | |
3722 // -agentlib: -agentpath: -Xrun | |
3723 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. | |
3724 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { | |
3725 OnLoadEntry_t on_load_entry = NULL; | |
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3726 void *library = NULL; |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3727 |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3728 if (!agent->valid()) { |
0 | 3729 char buffer[JVM_MAXPATHLEN]; |
3730 char ebuf[1024]; | |
3731 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
|
3732 const char *msg = "Could not find agent library "; |
0 | 3733 |
12220 | 3734 // First check to see if agent is statically linked into executable |
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3735 if (os::find_builtin_agent(agent, on_load_symbols, num_symbol_entries)) { |
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3736 library = agent->os_lib(); |
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3737 } else if (agent->is_absolute_path()) { |
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3738 library = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3739 if (library == NULL) { |
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3740 const char *sub_msg = " in absolute path, with error: "; |
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3741 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3742 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
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3743 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3744 // If we can't find the agent, exit. |
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3745 vm_exit_during_initialization(buf, NULL); |
6197 | 3746 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3747 } |
3748 } else { | |
3749 // Try to load the agent from the standard dll directory | |
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3750 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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3751 name)) { |
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3752 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
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3753 } |
0 | 3754 if (library == NULL) { // Try the local directory |
3755 char ns[1] = {0}; | |
6966
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3756 if (os::dll_build_name(buffer, sizeof(buffer), ns, name)) { |
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3757 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
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3758 } |
0 | 3759 if (library == NULL) { |
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3760 const char *sub_msg = " on the library path, with error: "; |
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3761 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3762 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
1694
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3763 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3764 // If we can't find the agent, exit. |
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3765 vm_exit_during_initialization(buf, NULL); |
6197 | 3766 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3767 } |
3768 } | |
3769 } | |
3770 agent->set_os_lib(library); | |
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3771 agent->set_valid(); |
0 | 3772 } |
3773 | |
3774 // Find the OnLoad function. | |
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3775 on_load_entry = |
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3776 CAST_TO_FN_PTR(OnLoadEntry_t, os::find_agent_function(agent, |
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3777 false, |
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|
3778 on_load_symbols, |
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3779 num_symbol_entries)); |
0 | 3780 return on_load_entry; |
3781 } | |
3782 | |
3783 // Find the JVM_OnLoad entry point | |
3784 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { | |
3785 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; | |
3786 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3787 } | |
3788 | |
3789 // Find the Agent_OnLoad entry point | |
3790 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { | |
3791 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; | |
3792 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3793 } | |
3794 | |
3795 // For backwards compatibility with -Xrun | |
3796 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be | |
3797 // treated like -agentpath: | |
3798 // Must be called before agent libraries are created | |
3799 void Threads::convert_vm_init_libraries_to_agents() { | |
3800 AgentLibrary* agent; | |
3801 AgentLibrary* next; | |
3802 | |
3803 for (agent = Arguments::libraries(); agent != NULL; agent = next) { | |
3804 next = agent->next(); // cache the next agent now as this agent may get moved off this list | |
3805 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3806 | |
3807 // If there is an JVM_OnLoad function it will get called later, | |
3808 // otherwise see if there is an Agent_OnLoad | |
3809 if (on_load_entry == NULL) { | |
3810 on_load_entry = lookup_agent_on_load(agent); | |
3811 if (on_load_entry != NULL) { | |
3812 // switch it to the agent list -- so that Agent_OnLoad will be called, | |
3813 // JVM_OnLoad won't be attempted and Agent_OnUnload will | |
3814 Arguments::convert_library_to_agent(agent); | |
3815 } else { | |
3816 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); | |
3817 } | |
3818 } | |
3819 } | |
3820 } | |
3821 | |
3822 // Create agents for -agentlib: -agentpath: and converted -Xrun | |
3823 // Invokes Agent_OnLoad | |
3824 // Called very early -- before JavaThreads exist | |
3825 void Threads::create_vm_init_agents() { | |
3826 extern struct JavaVM_ main_vm; | |
3827 AgentLibrary* agent; | |
3828 | |
3829 JvmtiExport::enter_onload_phase(); | |
6854
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3830 |
0 | 3831 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
3832 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); | |
3833 | |
3834 if (on_load_entry != NULL) { | |
3835 // Invoke the Agent_OnLoad function | |
3836 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3837 if (err != JNI_OK) { | |
3838 vm_exit_during_initialization("agent library failed to init", agent->name()); | |
3839 } | |
3840 } else { | |
3841 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); | |
3842 } | |
3843 } | |
3844 JvmtiExport::enter_primordial_phase(); | |
3845 } | |
3846 | |
3847 extern "C" { | |
3848 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); | |
3849 } | |
3850 | |
3851 void Threads::shutdown_vm_agents() { | |
3852 // Send any Agent_OnUnload notifications | |
3853 const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS; | |
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3854 size_t num_symbol_entries = ARRAY_SIZE(on_unload_symbols); |
0 | 3855 extern struct JavaVM_ main_vm; |
3856 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
3857 | |
3858 // Find the Agent_OnUnload function. | |
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3859 Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t, |
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|
3860 os::find_agent_function(agent, |
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|
3861 false, |
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|
3862 on_unload_symbols, |
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|
3863 num_symbol_entries)); |
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|
3864 |
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|
3865 // Invoke the Agent_OnUnload function |
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|
3866 if (unload_entry != NULL) { |
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3867 JavaThread* thread = JavaThread::current(); |
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|
3868 ThreadToNativeFromVM ttn(thread); |
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|
3869 HandleMark hm(thread); |
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3870 (*unload_entry)(&main_vm); |
0 | 3871 } |
3872 } | |
3873 } | |
3874 | |
3875 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries | |
3876 // Invokes JVM_OnLoad | |
3877 void Threads::create_vm_init_libraries() { | |
3878 extern struct JavaVM_ main_vm; | |
3879 AgentLibrary* agent; | |
3880 | |
3881 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { | |
3882 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3883 | |
3884 if (on_load_entry != NULL) { | |
3885 // Invoke the JVM_OnLoad function | |
3886 JavaThread* thread = JavaThread::current(); | |
3887 ThreadToNativeFromVM ttn(thread); | |
3888 HandleMark hm(thread); | |
3889 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3890 if (err != JNI_OK) { | |
3891 vm_exit_during_initialization("-Xrun library failed to init", agent->name()); | |
3892 } | |
3893 } else { | |
3894 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); | |
3895 } | |
3896 } | |
3897 } | |
3898 | |
3899 // Last thread running calls java.lang.Shutdown.shutdown() | |
3900 void JavaThread::invoke_shutdown_hooks() { | |
3901 HandleMark hm(this); | |
3902 | |
3903 // We could get here with a pending exception, if so clear it now. | |
3904 if (this->has_pending_exception()) { | |
3905 this->clear_pending_exception(); | |
3906 } | |
3907 | |
3908 EXCEPTION_MARK; | |
6725
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3909 Klass* k = |
2177
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3910 SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
0 | 3911 THREAD); |
3912 if (k != NULL) { | |
3913 // SystemDictionary::resolve_or_null will return null if there was | |
3914 // an exception. If we cannot load the Shutdown class, just don't | |
3915 // call Shutdown.shutdown() at all. This will mean the shutdown hooks | |
3916 // and finalizers (if runFinalizersOnExit is set) won't be run. | |
3917 // Note that if a shutdown hook was registered or runFinalizersOnExit | |
3918 // was called, the Shutdown class would have already been loaded | |
3919 // (Runtime.addShutdownHook and runFinalizersOnExit will load it). | |
3920 instanceKlassHandle shutdown_klass (THREAD, k); | |
3921 JavaValue result(T_VOID); | |
3922 JavaCalls::call_static(&result, | |
3923 shutdown_klass, | |
2177
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3924 vmSymbols::shutdown_method_name(), |
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3925 vmSymbols::void_method_signature(), |
0 | 3926 THREAD); |
3927 } | |
3928 CLEAR_PENDING_EXCEPTION; | |
3929 } | |
3930 | |
3931 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when | |
3932 // the program falls off the end of main(). Another VM exit path is through | |
3933 // vm_exit() when the program calls System.exit() to return a value or when | |
3934 // there is a serious error in VM. The two shutdown paths are not exactly | |
3935 // the same, but they share Shutdown.shutdown() at Java level and before_exit() | |
3936 // and VM_Exit op at VM level. | |
3937 // | |
3938 // Shutdown sequence: | |
6197 | 3939 // + Shutdown native memory tracking if it is on |
0 | 3940 // + Wait until we are the last non-daemon thread to execute |
3941 // <-- every thing is still working at this moment --> | |
3942 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level | |
3943 // shutdown hooks, run finalizers if finalization-on-exit | |
3944 // + Call before_exit(), prepare for VM exit | |
3945 // > run VM level shutdown hooks (they are registered through JVM_OnExit(), | |
3946 // currently the only user of this mechanism is File.deleteOnExit()) | |
3947 // > stop flat profiler, StatSampler, watcher thread, CMS threads, | |
3948 // post thread end and vm death events to JVMTI, | |
3949 // stop signal thread | |
3950 // + Call JavaThread::exit(), it will: | |
3951 // > release JNI handle blocks, remove stack guard pages | |
3952 // > remove this thread from Threads list | |
3953 // <-- no more Java code from this thread after this point --> | |
3954 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop | |
3955 // the compiler threads at safepoint | |
3956 // <-- do not use anything that could get blocked by Safepoint --> | |
3957 // + Disable tracing at JNI/JVM barriers | |
3958 // + Set _vm_exited flag for threads that are still running native code | |
3959 // + Delete this thread | |
3960 // + Call exit_globals() | |
3961 // > deletes tty | |
3962 // > deletes PerfMemory resources | |
3963 // + Return to caller | |
3964 | |
3965 bool Threads::destroy_vm() { | |
3966 JavaThread* thread = JavaThread::current(); | |
3967 | |
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3968 #ifdef ASSERT |
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3969 _vm_complete = false; |
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3970 #endif |
0 | 3971 // Wait until we are the last non-daemon thread to execute |
3972 { MutexLocker nu(Threads_lock); | |
3973 while (Threads::number_of_non_daemon_threads() > 1 ) | |
3974 // This wait should make safepoint checks, wait without a timeout, | |
3975 // and wait as a suspend-equivalent condition. | |
3976 // | |
3977 // Note: If the FlatProfiler is running and this thread is waiting | |
3978 // for another non-daemon thread to finish, then the FlatProfiler | |
3979 // is waiting for the external suspend request on this thread to | |
3980 // complete. wait_for_ext_suspend_completion() will eventually | |
3981 // timeout, but that takes time. Making this wait a suspend- | |
3982 // equivalent condition solves that timeout problem. | |
3983 // | |
3984 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
3985 Mutex::_as_suspend_equivalent_flag); | |
3986 } | |
3987 | |
3988 // Hang forever on exit if we are reporting an error. | |
3989 if (ShowMessageBoxOnError && is_error_reported()) { | |
3990 os::infinite_sleep(); | |
3991 } | |
2302
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3992 os::wait_for_keypress_at_exit(); |
0 | 3993 |
3994 if (JDK_Version::is_jdk12x_version()) { | |
3995 // We are the last thread running, so check if finalizers should be run. | |
3996 // For 1.3 or later this is done in thread->invoke_shutdown_hooks() | |
3997 HandleMark rm(thread); | |
3998 Universe::run_finalizers_on_exit(); | |
3999 } else { | |
4000 // run Java level shutdown hooks | |
4001 thread->invoke_shutdown_hooks(); | |
4002 } | |
4003 | |
4004 before_exit(thread); | |
4005 | |
4006 thread->exit(true); | |
4007 | |
4008 // Stop VM thread. | |
4009 { | |
4010 // 4945125 The vm thread comes to a safepoint during exit. | |
4011 // GC vm_operations can get caught at the safepoint, and the | |
4012 // heap is unparseable if they are caught. Grab the Heap_lock | |
4013 // to prevent this. The GC vm_operations will not be able to | |
4014 // queue until after the vm thread is dead. | |
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4015 // After this point, we'll never emerge out of the safepoint before |
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4016 // the VM exits, so concurrent GC threads do not need to be explicitly |
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4017 // stopped; they remain inactive until the process exits. |
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4018 // Note: some concurrent G1 threads may be running during a safepoint, |
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4019 // but these will not be accessing the heap, just some G1-specific side |
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4020 // data structures that are not accessed by any other threads but them |
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4021 // after this point in a terminal safepoint. |
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|
4022 |
0 | 4023 MutexLocker ml(Heap_lock); |
4024 | |
4025 VMThread::wait_for_vm_thread_exit(); | |
4026 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); | |
4027 VMThread::destroy(); | |
4028 } | |
4029 | |
4030 // clean up ideal graph printers | |
4031 #if defined(COMPILER2) && !defined(PRODUCT) | |
4032 IdealGraphPrinter::clean_up(); | |
4033 #endif | |
4034 | |
4035 // Now, all Java threads are gone except daemon threads. Daemon threads | |
4036 // running Java code or in VM are stopped by the Safepoint. However, | |
4037 // daemon threads executing native code are still running. But they | |
4038 // will be stopped at native=>Java/VM barriers. Note that we can't | |
4039 // simply kill or suspend them, as it is inherently deadlock-prone. | |
4040 | |
4041 #ifndef PRODUCT | |
4042 // disable function tracing at JNI/JVM barriers | |
4043 TraceJNICalls = false; | |
4044 TraceJVMCalls = false; | |
4045 TraceRuntimeCalls = false; | |
4046 #endif | |
4047 | |
4048 VM_Exit::set_vm_exited(); | |
4049 | |
4050 notify_vm_shutdown(); | |
4051 | |
4052 delete thread; | |
4053 | |
4054 // exit_globals() will delete tty | |
4055 exit_globals(); | |
4056 | |
4057 return true; | |
4058 } | |
4059 | |
4060 | |
4061 jboolean Threads::is_supported_jni_version_including_1_1(jint version) { | |
4062 if (version == JNI_VERSION_1_1) return JNI_TRUE; | |
4063 return is_supported_jni_version(version); | |
4064 } | |
4065 | |
4066 | |
4067 jboolean Threads::is_supported_jni_version(jint version) { | |
4068 if (version == JNI_VERSION_1_2) return JNI_TRUE; | |
4069 if (version == JNI_VERSION_1_4) return JNI_TRUE; | |
4070 if (version == JNI_VERSION_1_6) return JNI_TRUE; | |
8793
499ccc15bbc8
8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
bpittore
parents:
8673
diff
changeset
|
4071 if (version == JNI_VERSION_1_8) return JNI_TRUE; |
0 | 4072 return JNI_FALSE; |
4073 } | |
4074 | |
4075 | |
4076 void Threads::add(JavaThread* p, bool force_daemon) { | |
4077 // The threads lock must be owned at this point | |
4078 assert_locked_or_safepoint(Threads_lock); | |
1842
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
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1838
diff
changeset
|
4079 |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
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1838
diff
changeset
|
4080 // 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
|
4081 // why it is called here. |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
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diff
changeset
|
4082 p->initialize_queues(); |
0 | 4083 p->set_next(_thread_list); |
4084 _thread_list = p; | |
4085 _number_of_threads++; | |
4086 oop threadObj = p->threadObj(); | |
4087 bool daemon = true; | |
4088 // Bootstrapping problem: threadObj can be null for initial | |
4089 // JavaThread (or for threads attached via JNI) | |
4090 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { | |
4091 _number_of_non_daemon_threads++; | |
4092 daemon = false; | |
4093 } | |
4094 | |
6197 | 4095 p->set_safepoint_visible(true); |
4096 | |
0 | 4097 ThreadService::add_thread(p, daemon); |
4098 | |
4099 // Possible GC point. | |
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7141200: log some interesting information in ring buffers for crashes
never
parents:
4800
diff
changeset
|
4100 Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
0 | 4101 } |
4102 | |
4103 void Threads::remove(JavaThread* p) { | |
4104 // Extra scope needed for Thread_lock, so we can check | |
4105 // that we do not remove thread without safepoint code notice | |
4106 { MutexLocker ml(Threads_lock); | |
4107 | |
4108 assert(includes(p), "p must be present"); | |
4109 | |
4110 JavaThread* current = _thread_list; | |
4111 JavaThread* prev = NULL; | |
4112 | |
4113 while (current != p) { | |
4114 prev = current; | |
4115 current = current->next(); | |
4116 } | |
4117 | |
4118 if (prev) { | |
4119 prev->set_next(current->next()); | |
4120 } else { | |
4121 _thread_list = p->next(); | |
4122 } | |
4123 _number_of_threads--; | |
4124 oop threadObj = p->threadObj(); | |
4125 bool daemon = true; | |
4126 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { | |
4127 _number_of_non_daemon_threads--; | |
4128 daemon = false; | |
4129 | |
4130 // Only one thread left, do a notify on the Threads_lock so a thread waiting | |
4131 // on destroy_vm will wake up. | |
4132 if (number_of_non_daemon_threads() == 1) | |
4133 Threads_lock->notify_all(); | |
4134 } | |
4135 ThreadService::remove_thread(p, daemon); | |
4136 | |
4137 // Make sure that safepoint code disregard this thread. This is needed since | |
4138 // the thread might mess around with locks after this point. This can cause it | |
4139 // to do callbacks into the safepoint code. However, the safepoint code is not aware | |
4140 // of this thread since it is removed from the queue. | |
4141 p->set_terminated_value(); | |
6197 | 4142 |
4143 // Now, this thread is not visible to safepoint | |
4144 p->set_safepoint_visible(false); | |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
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6872
diff
changeset
|
4145 // once the thread becomes safepoint invisible, we can not use its per-thread |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
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6872
diff
changeset
|
4146 // recorder. And Threads::do_threads() no longer walks this thread, so we have |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
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6872
diff
changeset
|
4147 // to release its per-thread recorder here. |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
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diff
changeset
|
4148 MemTracker::thread_exiting(p); |
0 | 4149 } // unlock Threads_lock |
4150 | |
4151 // 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
|
4152 Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
0 | 4153 } |
4154 | |
4155 // Threads_lock must be held when this is called (or must be called during a safepoint) | |
4156 bool Threads::includes(JavaThread* p) { | |
4157 assert(Threads_lock->is_locked(), "sanity check"); | |
4158 ALL_JAVA_THREADS(q) { | |
4159 if (q == p ) { | |
4160 return true; | |
4161 } | |
4162 } | |
4163 return false; | |
4164 } | |
4165 | |
4166 // Operations on the Threads list for GC. These are not explicitly locked, | |
4167 // but the garbage collector must provide a safe context for them to run. | |
4168 // In particular, these things should never be called when the Threads_lock | |
4169 // is held by some other thread. (Note: the Safepoint abstraction also | |
4170 // uses the Threads_lock to gurantee this property. It also makes sure that | |
4171 // all threads gets blocked when exiting or starting). | |
4172 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4173 void Threads::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4174 ALL_JAVA_THREADS(p) { |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4175 p->oops_do(f, cld_f, cf); |
0 | 4176 } |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4177 VMThread::vm_thread()->oops_do(f, cld_f, cf); |
0 | 4178 } |
4179 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4180 void Threads::possibly_parallel_oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4181 // Introduce a mechanism allowing parallel threads to claim threads as |
4182 // root groups. Overhead should be small enough to use all the time, | |
4183 // even in sequential code. | |
4184 SharedHeap* sh = SharedHeap::heap(); | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4185 // Cannot yet substitute active_workers for n_par_threads |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
4186 // because of G1CollectedHeap::verify() use of |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4187 // SharedHeap::process_strong_roots(). n_par_threads == 0 will |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4188 // 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
|
4189 // is being used for parallelism elsewhere. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4190 bool is_par = sh->n_par_threads() > 0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4191 assert(!is_par || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4192 (SharedHeap::heap()->n_par_threads() == |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4193 SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
0 | 4194 int cp = SharedHeap::heap()->strong_roots_parity(); |
4195 ALL_JAVA_THREADS(p) { | |
4196 if (p->claim_oops_do(is_par, cp)) { | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4197 p->oops_do(f, cld_f, cf); |
0 | 4198 } |
4199 } | |
4200 VMThread* vmt = VMThread::vm_thread(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4201 if (vmt->claim_oops_do(is_par, cp)) { |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4202 vmt->oops_do(f, cld_f, cf); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4203 } |
0 | 4204 } |
4205 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4206 #if INCLUDE_ALL_GCS |
0 | 4207 // Used by ParallelScavenge |
4208 void Threads::create_thread_roots_tasks(GCTaskQueue* q) { | |
4209 ALL_JAVA_THREADS(p) { | |
4210 q->enqueue(new ThreadRootsTask(p)); | |
4211 } | |
4212 q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); | |
4213 } | |
4214 | |
4215 // Used by Parallel Old | |
4216 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { | |
4217 ALL_JAVA_THREADS(p) { | |
4218 q->enqueue(new ThreadRootsMarkingTask(p)); | |
4219 } | |
4220 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); | |
4221 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4222 #endif // INCLUDE_ALL_GCS |
0 | 4223 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4224 void Threads::nmethods_do(CodeBlobClosure* cf) { |
0 | 4225 ALL_JAVA_THREADS(p) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4226 p->nmethods_do(cf); |
0 | 4227 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4228 VMThread::vm_thread()->nmethods_do(cf); |
0 | 4229 } |
4230 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4231 void Threads::metadata_do(void f(Metadata*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4232 ALL_JAVA_THREADS(p) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4233 p->metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4234 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4235 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4236 |
0 | 4237 void Threads::gc_epilogue() { |
4238 ALL_JAVA_THREADS(p) { | |
4239 p->gc_epilogue(); | |
4240 } | |
4241 } | |
4242 | |
4243 void Threads::gc_prologue() { | |
4244 ALL_JAVA_THREADS(p) { | |
4245 p->gc_prologue(); | |
4246 } | |
4247 } | |
4248 | |
4249 void Threads::deoptimized_wrt_marked_nmethods() { | |
4250 ALL_JAVA_THREADS(p) { | |
4251 p->deoptimized_wrt_marked_nmethods(); | |
4252 } | |
4253 } | |
4254 | |
4255 | |
4256 // Get count Java threads that are waiting to enter the specified monitor. | |
4257 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, | |
4258 address monitor, bool doLock) { | |
4259 assert(doLock || SafepointSynchronize::is_at_safepoint(), | |
4260 "must grab Threads_lock or be at safepoint"); | |
4261 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); | |
4262 | |
4263 int i = 0; | |
4264 { | |
4265 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4266 ALL_JAVA_THREADS(p) { | |
4267 if (p->is_Compiler_thread()) continue; | |
4268 | |
4269 address pending = (address)p->current_pending_monitor(); | |
4270 if (pending == monitor) { // found a match | |
4271 if (i < count) result->append(p); // save the first count matches | |
4272 i++; | |
4273 } | |
4274 } | |
4275 } | |
4276 return result; | |
4277 } | |
4278 | |
4279 | |
4280 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { | |
4281 assert(doLock || | |
4282 Threads_lock->owned_by_self() || | |
4283 SafepointSynchronize::is_at_safepoint(), | |
4284 "must grab Threads_lock or be at safepoint"); | |
4285 | |
4286 // NULL owner means not locked so we can skip the search | |
4287 if (owner == NULL) return NULL; | |
4288 | |
4289 { | |
4290 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4291 ALL_JAVA_THREADS(p) { | |
4292 // first, see if owner is the address of a Java thread | |
4293 if (owner == (address)p) return p; | |
4294 } | |
4295 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4296 // Cannot assert on lack of success here since this function may be |
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4297 // used by code that is trying to report useful problem information |
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4298 // like deadlock detection. |
0 | 4299 if (UseHeavyMonitors) return NULL; |
4300 | |
4301 // | |
4302 // If we didn't find a matching Java thread and we didn't force use of | |
4303 // heavyweight monitors, then the owner is the stack address of the | |
4304 // Lock Word in the owning Java thread's stack. | |
4305 // | |
4306 JavaThread* the_owner = NULL; | |
4307 { | |
4308 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4309 ALL_JAVA_THREADS(q) { | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4310 if (q->is_lock_owned(owner)) { |
0 | 4311 the_owner = q; |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4312 break; |
0 | 4313 } |
4314 } | |
4315 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4316 // cannot assert on lack of success here; see above comment |
0 | 4317 return the_owner; |
4318 } | |
4319 | |
4320 // Threads::print_on() is called at safepoint by VM_PrintThreads operation. | |
4321 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { | |
4322 char buf[32]; | |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17876
diff
changeset
|
4323 st->print_cr("%s", os::local_time_string(buf, sizeof(buf))); |
0 | 4324 |
4325 st->print_cr("Full thread dump %s (%s %s):", | |
4326 Abstract_VM_Version::vm_name(), | |
4327 Abstract_VM_Version::vm_release(), | |
4328 Abstract_VM_Version::vm_info_string() | |
4329 ); | |
4330 st->cr(); | |
4331 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4332 #if INCLUDE_ALL_GCS |
0 | 4333 // Dump concurrent locks |
4334 ConcurrentLocksDump concurrent_locks; | |
4335 if (print_concurrent_locks) { | |
4336 concurrent_locks.dump_at_safepoint(); | |
4337 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4338 #endif // INCLUDE_ALL_GCS |
0 | 4339 |
4340 ALL_JAVA_THREADS(p) { | |
4341 ResourceMark rm; | |
4342 p->print_on(st); | |
4343 if (print_stacks) { | |
4344 if (internal_format) { | |
4345 p->trace_stack(); | |
4346 } else { | |
4347 p->print_stack_on(st); | |
4348 } | |
4349 } | |
4350 st->cr(); | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4351 #if INCLUDE_ALL_GCS |
0 | 4352 if (print_concurrent_locks) { |
4353 concurrent_locks.print_locks_on(p, st); | |
4354 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4355 #endif // INCLUDE_ALL_GCS |
0 | 4356 } |
4357 | |
4358 VMThread::vm_thread()->print_on(st); | |
4359 st->cr(); | |
4360 Universe::heap()->print_gc_threads_on(st); | |
4361 WatcherThread* wt = WatcherThread::watcher_thread(); | |
6766 | 4362 if (wt != NULL) { |
4363 wt->print_on(st); | |
4364 st->cr(); | |
4365 } | |
0 | 4366 CompileBroker::print_compiler_threads_on(st); |
4367 st->flush(); | |
4368 } | |
4369 | |
4370 // Threads::print_on_error() is called by fatal error handler. It's possible | |
4371 // that VM is not at safepoint and/or current thread is inside signal handler. | |
4372 // Don't print stack trace, as the stack may not be walkable. Don't allocate | |
4373 // memory (even in resource area), it might deadlock the error handler. | |
4374 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { | |
4375 bool found_current = false; | |
4376 st->print_cr("Java Threads: ( => current thread )"); | |
4377 ALL_JAVA_THREADS(thread) { | |
4378 bool is_current = (current == thread); | |
4379 found_current = found_current || is_current; | |
4380 | |
4381 st->print("%s", is_current ? "=>" : " "); | |
4382 | |
4383 st->print(PTR_FORMAT, thread); | |
4384 st->print(" "); | |
4385 thread->print_on_error(st, buf, buflen); | |
4386 st->cr(); | |
4387 } | |
4388 st->cr(); | |
4389 | |
4390 st->print_cr("Other Threads:"); | |
4391 if (VMThread::vm_thread()) { | |
4392 bool is_current = (current == VMThread::vm_thread()); | |
4393 found_current = found_current || is_current; | |
4394 st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); | |
4395 | |
4396 st->print(PTR_FORMAT, VMThread::vm_thread()); | |
4397 st->print(" "); | |
4398 VMThread::vm_thread()->print_on_error(st, buf, buflen); | |
4399 st->cr(); | |
4400 } | |
4401 WatcherThread* wt = WatcherThread::watcher_thread(); | |
4402 if (wt != NULL) { | |
4403 bool is_current = (current == wt); | |
4404 found_current = found_current || is_current; | |
4405 st->print("%s", is_current ? "=>" : " "); | |
4406 | |
4407 st->print(PTR_FORMAT, wt); | |
4408 st->print(" "); | |
4409 wt->print_on_error(st, buf, buflen); | |
4410 st->cr(); | |
4411 } | |
4412 if (!found_current) { | |
4413 st->cr(); | |
4414 st->print("=>" PTR_FORMAT " (exited) ", current); | |
4415 current->print_on_error(st, buf, buflen); | |
4416 st->cr(); | |
4417 } | |
4418 } | |
4419 | |
1878 | 4420 // Internal SpinLock and Mutex |
4421 // Based on ParkEvent | |
4422 | |
4423 // Ad-hoc mutual exclusion primitives: SpinLock and Mux | |
0 | 4424 // |
1878 | 4425 // We employ SpinLocks _only for low-contention, fixed-length |
4426 // short-duration critical sections where we're concerned | |
4427 // about native mutex_t or HotSpot Mutex:: latency. | |
4428 // The mux construct provides a spin-then-block mutual exclusion | |
4429 // mechanism. | |
4430 // | |
4431 // Testing has shown that contention on the ListLock guarding gFreeList | |
4432 // is common. If we implement ListLock as a simple SpinLock it's common | |
4433 // for the JVM to devolve to yielding with little progress. This is true | |
4434 // despite the fact that the critical sections protected by ListLock are | |
4435 // extremely short. | |
0 | 4436 // |
1878 | 4437 // TODO-FIXME: ListLock should be of type SpinLock. |
4438 // We should make this a 1st-class type, integrated into the lock | |
4439 // hierarchy as leaf-locks. Critically, the SpinLock structure | |
4440 // should have sufficient padding to avoid false-sharing and excessive | |
4441 // cache-coherency traffic. | |
4442 | |
4443 | |
4444 typedef volatile int SpinLockT ; | |
4445 | |
4446 void Thread::SpinAcquire (volatile int * adr, const char * LockName) { | |
4447 if (Atomic::cmpxchg (1, adr, 0) == 0) { | |
4448 return ; // normal fast-path return | |
4449 } | |
4450 | |
4451 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy. | |
4452 TEVENT (SpinAcquire - ctx) ; | |
4453 int ctr = 0 ; | |
4454 int Yields = 0 ; | |
0 | 4455 for (;;) { |
1878 | 4456 while (*adr != 0) { |
4457 ++ctr ; | |
4458 if ((ctr & 0xFFF) == 0 || !os::is_MP()) { | |
4459 if (Yields > 5) { | |
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8028280: ParkEvent leak when running modified runThese which only loads classes
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parents:
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changeset
|
4460 os::naked_short_sleep(1); |
1878 | 4461 } else { |
4462 os::NakedYield() ; | |
4463 ++Yields ; | |
4464 } | |
4465 } else { | |
4466 SpinPause() ; | |
0 | 4467 } |
1878 | 4468 } |
4469 if (Atomic::cmpxchg (1, adr, 0) == 0) return ; | |
0 | 4470 } |
4471 } | |
4472 | |
1878 | 4473 void Thread::SpinRelease (volatile int * adr) { |
4474 assert (*adr != 0, "invariant") ; | |
4475 OrderAccess::fence() ; // guarantee at least release consistency. | |
4476 // Roach-motel semantics. | |
4477 // It's safe if subsequent LDs and STs float "up" into the critical section, | |
4478 // but prior LDs and STs within the critical section can't be allowed | |
4479 // to reorder or float past the ST that releases the lock. | |
4480 *adr = 0 ; | |
0 | 4481 } |
4482 | |
1878 | 4483 // muxAcquire and muxRelease: |
4484 // | |
4485 // * muxAcquire and muxRelease support a single-word lock-word construct. | |
4486 // The LSB of the word is set IFF the lock is held. | |
4487 // The remainder of the word points to the head of a singly-linked list | |
4488 // of threads blocked on the lock. | |
4489 // | |
4490 // * The current implementation of muxAcquire-muxRelease uses its own | |
4491 // dedicated Thread._MuxEvent instance. If we're interested in | |
4492 // minimizing the peak number of extant ParkEvent instances then | |
4493 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long | |
4494 // as certain invariants were satisfied. Specifically, care would need | |
4495 // to be taken with regards to consuming unpark() "permits". | |
4496 // A safe rule of thumb is that a thread would never call muxAcquire() | |
4497 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently | |
4498 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could | |
4499 // consume an unpark() permit intended for monitorenter, for instance. | |
4500 // One way around this would be to widen the restricted-range semaphore | |
4501 // implemented in park(). Another alternative would be to provide | |
4502 // multiple instances of the PlatformEvent() for each thread. One | |
4503 // instance would be dedicated to muxAcquire-muxRelease, for instance. | |
4504 // | |
4505 // * Usage: | |
4506 // -- Only as leaf locks | |
4507 // -- for short-term locking only as muxAcquire does not perform | |
4508 // thread state transitions. | |
4509 // | |
4510 // Alternatives: | |
4511 // * We could implement muxAcquire and muxRelease with MCS or CLH locks | |
4512 // but with parking or spin-then-park instead of pure spinning. | |
4513 // * Use Taura-Oyama-Yonenzawa locks. | |
4514 // * It's possible to construct a 1-0 lock if we encode the lockword as | |
4515 // (List,LockByte). Acquire will CAS the full lockword while Release | |
4516 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so | |
4517 // acquiring threads use timers (ParkTimed) to detect and recover from | |
4518 // the stranding window. Thread/Node structures must be aligned on 256-byte | |
4519 // boundaries by using placement-new. | |
4520 // * Augment MCS with advisory back-link fields maintained with CAS(). | |
4521 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. | |
4522 // The validity of the backlinks must be ratified before we trust the value. | |
4523 // If the backlinks are invalid the exiting thread must back-track through the | |
4524 // the forward links, which are always trustworthy. | |
4525 // * Add a successor indication. The LockWord is currently encoded as | |
4526 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable | |
4527 // to provide the usual futile-wakeup optimization. | |
4528 // See RTStt for details. | |
4529 // * Consider schedctl.sc_nopreempt to cover the critical section. | |
4530 // | |
4531 | |
4532 | |
4533 typedef volatile intptr_t MutexT ; // Mux Lock-word | |
4534 enum MuxBits { LOCKBIT = 1 } ; | |
4535 | |
4536 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { | |
4537 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4538 if (w == 0) return ; | |
4539 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4540 return ; | |
4541 } | |
4542 | |
4543 TEVENT (muxAcquire - Contention) ; | |
4544 ParkEvent * const Self = Thread::current()->_MuxEvent ; | |
4545 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; | |
0 | 4546 for (;;) { |
1878 | 4547 int its = (os::is_MP() ? 100 : 0) + 1 ; |
4548 | |
4549 // Optional spin phase: spin-then-park strategy | |
4550 while (--its >= 0) { | |
4551 w = *Lock ; | |
4552 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4553 return ; | |
4554 } | |
4555 } | |
4556 | |
4557 Self->reset() ; | |
4558 Self->OnList = intptr_t(Lock) ; | |
4559 // The following fence() isn't _strictly necessary as the subsequent | |
4560 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4561 OrderAccess::fence(); | |
4562 for (;;) { | |
4563 w = *Lock ; | |
4564 if ((w & LOCKBIT) == 0) { | |
4565 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4566 Self->OnList = 0 ; // hygiene - allows stronger asserts | |
4567 return ; | |
4568 } | |
4569 continue ; // Interference -- *Lock changed -- Just retry | |
0 | 4570 } |
1878 | 4571 assert (w & LOCKBIT, "invariant") ; |
4572 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4573 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; | |
4574 } | |
4575 | |
4576 while (Self->OnList != 0) { | |
4577 Self->park() ; | |
4578 } | |
0 | 4579 } |
4580 } | |
4581 | |
1878 | 4582 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
4583 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4584 if (w == 0) return ; | |
4585 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4586 return ; | |
4587 } | |
4588 | |
4589 TEVENT (muxAcquire - Contention) ; | |
4590 ParkEvent * ReleaseAfter = NULL ; | |
4591 if (ev == NULL) { | |
4592 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; | |
4593 } | |
4594 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; | |
4595 for (;;) { | |
4596 guarantee (ev->OnList == 0, "invariant") ; | |
4597 int its = (os::is_MP() ? 100 : 0) + 1 ; | |
4598 | |
4599 // Optional spin phase: spin-then-park strategy | |
4600 while (--its >= 0) { | |
4601 w = *Lock ; | |
4602 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4603 if (ReleaseAfter != NULL) { | |
4604 ParkEvent::Release (ReleaseAfter) ; | |
4605 } | |
4606 return ; | |
4607 } | |
4608 } | |
4609 | |
4610 ev->reset() ; | |
4611 ev->OnList = intptr_t(Lock) ; | |
4612 // The following fence() isn't _strictly necessary as the subsequent | |
4613 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4614 OrderAccess::fence(); | |
4615 for (;;) { | |
4616 w = *Lock ; | |
4617 if ((w & LOCKBIT) == 0) { | |
4618 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4619 ev->OnList = 0 ; | |
4620 // We call ::Release while holding the outer lock, thus | |
4621 // artificially lengthening the critical section. | |
4622 // Consider deferring the ::Release() until the subsequent unlock(), | |
4623 // after we've dropped the outer lock. | |
4624 if (ReleaseAfter != NULL) { | |
4625 ParkEvent::Release (ReleaseAfter) ; | |
4626 } | |
4627 return ; | |
4628 } | |
4629 continue ; // Interference -- *Lock changed -- Just retry | |
4630 } | |
4631 assert (w & LOCKBIT, "invariant") ; | |
4632 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4633 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; | |
4634 } | |
4635 | |
4636 while (ev->OnList != 0) { | |
4637 ev->park() ; | |
4638 } | |
4639 } | |
4640 } | |
4641 | |
4642 // Release() must extract a successor from the list and then wake that thread. | |
4643 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme | |
4644 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based | |
4645 // Release() would : | |
4646 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. | |
4647 // (B) Extract a successor from the private list "in-hand" | |
4648 // (C) attempt to CAS() the residual back into *Lock over null. | |
4649 // If there were any newly arrived threads and the CAS() would fail. | |
4650 // In that case Release() would detach the RATs, re-merge the list in-hand | |
4651 // with the RATs and repeat as needed. Alternately, Release() might | |
4652 // detach and extract a successor, but then pass the residual list to the wakee. | |
4653 // The wakee would be responsible for reattaching and remerging before it | |
4654 // competed for the lock. | |
4655 // | |
4656 // Both "pop" and DMR are immune from ABA corruption -- there can be | |
4657 // multiple concurrent pushers, but only one popper or detacher. | |
4658 // This implementation pops from the head of the list. This is unfair, | |
4659 // but tends to provide excellent throughput as hot threads remain hot. | |
4660 // (We wake recently run threads first). | |
4661 | |
4662 void Thread::muxRelease (volatile intptr_t * Lock) { | |
4663 for (;;) { | |
4664 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; | |
4665 assert (w & LOCKBIT, "invariant") ; | |
4666 if (w == LOCKBIT) return ; | |
4667 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; | |
4668 assert (List != NULL, "invariant") ; | |
4669 assert (List->OnList == intptr_t(Lock), "invariant") ; | |
4670 ParkEvent * nxt = List->ListNext ; | |
4671 | |
4672 // The following CAS() releases the lock and pops the head element. | |
4673 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { | |
4674 continue ; | |
4675 } | |
4676 List->OnList = 0 ; | |
4677 OrderAccess::fence() ; | |
4678 List->unpark () ; | |
4679 return ; | |
4680 } | |
4681 } | |
4682 | |
4683 | |
0 | 4684 void Threads::verify() { |
4685 ALL_JAVA_THREADS(p) { | |
4686 p->verify(); | |
4687 } | |
4688 VMThread* thread = VMThread::vm_thread(); | |
4689 if (thread != NULL) thread->verify(); | |
4690 } |