Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.cpp @ 13641:5a9afbf72714
Add a speculation oop for uncommon trap deoptimization. Save it in the SpeculationLog during deoptimization.
author | Gilles Duboscq <duboscq@ssw.jku.at> |
---|---|
date | Thu, 12 Dec 2013 15:13:02 +0100 |
parents | 6b2d8d20ecbd |
children | e0102f250d76 |
rev | line source |
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0 | 1 /* |
7951 | 2 * Copyright (c) 1997, 2013, 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" | |
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32 #ifdef GRAAL |
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33 #include "graal/graalCompiler.hpp" |
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34 #endif |
1972 | 35 #include "interpreter/interpreter.hpp" |
36 #include "interpreter/linkResolver.hpp" | |
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37 #include "interpreter/oopMapCache.hpp" |
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38 #include "jvmtifiles/jvmtiEnv.hpp" |
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39 #include "memory/gcLocker.inline.hpp" |
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40 #include "memory/metaspaceShared.hpp" |
1972 | 41 #include "memory/oopFactory.hpp" |
42 #include "memory/universe.inline.hpp" | |
43 #include "oops/instanceKlass.hpp" | |
44 #include "oops/objArrayOop.hpp" | |
45 #include "oops/oop.inline.hpp" | |
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46 #include "oops/symbol.hpp" |
1972 | 47 #include "prims/jvm_misc.hpp" |
48 #include "prims/jvmtiExport.hpp" | |
49 #include "prims/jvmtiThreadState.hpp" | |
50 #include "prims/privilegedStack.hpp" | |
51 #include "runtime/arguments.hpp" | |
52 #include "runtime/biasedLocking.hpp" | |
53 #include "runtime/deoptimization.hpp" | |
54 #include "runtime/fprofiler.hpp" | |
55 #include "runtime/frame.inline.hpp" | |
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56 #include "runtime/gpu.hpp" |
1972 | 57 #include "runtime/init.hpp" |
58 #include "runtime/interfaceSupport.hpp" | |
59 #include "runtime/java.hpp" | |
60 #include "runtime/javaCalls.hpp" | |
61 #include "runtime/jniPeriodicChecker.hpp" | |
62 #include "runtime/memprofiler.hpp" | |
63 #include "runtime/mutexLocker.hpp" | |
64 #include "runtime/objectMonitor.hpp" | |
65 #include "runtime/osThread.hpp" | |
66 #include "runtime/safepoint.hpp" | |
67 #include "runtime/sharedRuntime.hpp" | |
68 #include "runtime/statSampler.hpp" | |
69 #include "runtime/stubRoutines.hpp" | |
70 #include "runtime/task.hpp" | |
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71 #include "runtime/thread.inline.hpp" |
1972 | 72 #include "runtime/threadCritical.hpp" |
73 #include "runtime/threadLocalStorage.hpp" | |
74 #include "runtime/vframe.hpp" | |
75 #include "runtime/vframeArray.hpp" | |
76 #include "runtime/vframe_hp.hpp" | |
77 #include "runtime/vmThread.hpp" | |
78 #include "runtime/vm_operations.hpp" | |
79 #include "services/attachListener.hpp" | |
80 #include "services/management.hpp" | |
6197 | 81 #include "services/memTracker.hpp" |
1972 | 82 #include "services/threadService.hpp" |
10405 | 83 #include "trace/tracing.hpp" |
84 #include "trace/traceMacros.hpp" | |
1972 | 85 #include "utilities/defaultStream.hpp" |
86 #include "utilities/dtrace.hpp" | |
87 #include "utilities/events.hpp" | |
88 #include "utilities/preserveException.hpp" | |
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89 #include "utilities/macros.hpp" |
1972 | 90 #ifdef TARGET_OS_FAMILY_linux |
91 # include "os_linux.inline.hpp" | |
92 #endif | |
93 #ifdef TARGET_OS_FAMILY_solaris | |
94 # include "os_solaris.inline.hpp" | |
95 #endif | |
96 #ifdef TARGET_OS_FAMILY_windows | |
97 # include "os_windows.inline.hpp" | |
98 #endif | |
3960 | 99 #ifdef TARGET_OS_FAMILY_bsd |
100 # include "os_bsd.inline.hpp" | |
101 #endif | |
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102 #if INCLUDE_ALL_GCS |
1972 | 103 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" |
104 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
105 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
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106 #endif // INCLUDE_ALL_GCS |
1972 | 107 #ifdef COMPILER1 |
108 #include "c1/c1_Compiler.hpp" | |
109 #endif | |
110 #ifdef COMPILER2 | |
111 #include "opto/c2compiler.hpp" | |
112 #include "opto/idealGraphPrinter.hpp" | |
113 #endif | |
0 | 114 |
115 #ifdef DTRACE_ENABLED | |
116 | |
117 // Only bother with this argument setup if dtrace is available | |
118 | |
4006 | 119 #ifndef USDT2 |
0 | 120 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
121 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); | |
122 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, | |
123 intptr_t, intptr_t, bool); | |
124 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, | |
125 intptr_t, intptr_t, bool); | |
126 | |
127 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
128 { \ | |
129 ResourceMark rm(this); \ | |
130 int len = 0; \ | |
131 const char* name = (javathread)->get_thread_name(); \ | |
132 len = strlen(name); \ | |
133 HS_DTRACE_PROBE5(hotspot, thread__##probe, \ | |
134 name, len, \ | |
135 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
136 (javathread)->osthread()->thread_id(), \ | |
137 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
138 } | |
139 | |
4006 | 140 #else /* USDT2 */ |
141 | |
142 #define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START | |
143 #define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP | |
144 | |
145 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
146 { \ | |
147 ResourceMark rm(this); \ | |
148 int len = 0; \ | |
149 const char* name = (javathread)->get_thread_name(); \ | |
150 len = strlen(name); \ | |
151 HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ | |
152 (char *) name, len, \ | |
153 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
154 (uintptr_t) (javathread)->osthread()->thread_id(), \ | |
155 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
156 } | |
157 | |
158 #endif /* USDT2 */ | |
159 | |
0 | 160 #else // ndef DTRACE_ENABLED |
161 | |
162 #define DTRACE_THREAD_PROBE(probe, javathread) | |
163 | |
164 #endif // ndef DTRACE_ENABLED | |
165 | |
6197 | 166 |
0 | 167 // Class hierarchy |
168 // - Thread | |
169 // - VMThread | |
170 // - WatcherThread | |
171 // - ConcurrentMarkSweepThread | |
172 // - JavaThread | |
173 // - CompilerThread | |
174 | |
175 // ======= Thread ======== | |
176 // Support for forcing alignment of thread objects for biased locking | |
6197 | 177 void* Thread::allocate(size_t size, bool throw_excpt, MEMFLAGS flags) { |
0 | 178 if (UseBiasedLocking) { |
179 const int alignment = markOopDesc::biased_lock_alignment; | |
180 size_t aligned_size = size + (alignment - sizeof(intptr_t)); | |
6197 | 181 void* real_malloc_addr = throw_excpt? AllocateHeap(aligned_size, flags, CURRENT_PC) |
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182 : AllocateHeap(aligned_size, flags, CURRENT_PC, |
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183 AllocFailStrategy::RETURN_NULL); |
0 | 184 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); |
185 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= | |
186 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), | |
187 "JavaThread alignment code overflowed allocated storage"); | |
188 if (TraceBiasedLocking) { | |
189 if (aligned_addr != real_malloc_addr) | |
190 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, | |
191 real_malloc_addr, aligned_addr); | |
192 } | |
193 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; | |
194 return aligned_addr; | |
195 } else { | |
6197 | 196 return throw_excpt? AllocateHeap(size, flags, CURRENT_PC) |
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197 : AllocateHeap(size, flags, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
0 | 198 } |
199 } | |
200 | |
201 void Thread::operator delete(void* p) { | |
202 if (UseBiasedLocking) { | |
203 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; | |
6197 | 204 FreeHeap(real_malloc_addr, mtThread); |
0 | 205 } else { |
6197 | 206 FreeHeap(p, mtThread); |
0 | 207 } |
208 } | |
209 | |
210 | |
211 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, | |
212 // JavaThread | |
213 | |
214 | |
215 Thread::Thread() { | |
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216 // stack and get_thread |
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217 set_stack_base(NULL); |
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218 set_stack_size(0); |
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219 set_self_raw_id(0); |
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220 set_lgrp_id(-1); |
0 | 221 |
222 // allocated data structures | |
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223 set_osthread(NULL); |
6197 | 224 set_resource_area(new (mtThread)ResourceArea()); |
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225 DEBUG_ONLY(_current_resource_mark = NULL;) |
6197 | 226 set_handle_area(new (mtThread) HandleArea(NULL)); |
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227 set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(30, true)); |
0 | 228 set_active_handles(NULL); |
229 set_free_handle_block(NULL); | |
230 set_last_handle_mark(NULL); | |
231 | |
232 // This initial value ==> never claimed. | |
233 _oops_do_parity = 0; | |
234 | |
235 // the handle mark links itself to last_handle_mark | |
10135 | 236 new HandleMark(this); |
237 | |
0 | 238 // plain initialization |
239 debug_only(_owned_locks = NULL;) | |
240 debug_only(_allow_allocation_count = 0;) | |
241 NOT_PRODUCT(_allow_safepoint_count = 0;) | |
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242 NOT_PRODUCT(_skip_gcalot = false;) |
0 | 243 CHECK_UNHANDLED_OOPS_ONLY(_gc_locked_out_count = 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 // CR 7190089: on Solaris, primordial thread's stack is adjusted |
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320 // in initialize_thread(). Without the adjustment, stack size is |
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321 // incorrect if stack is set to unlimited (ulimit -s unlimited). |
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322 // So far, only Solaris has real implementation of initialize_thread(). |
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323 // |
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324 // set up any platform-specific state. |
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325 os::initialize_thread(this); |
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326 |
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327 #if INCLUDE_NMT |
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328 // record thread's native stack, stack grows downward |
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329 address stack_low_addr = stack_base() - stack_size(); |
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330 MemTracker::record_thread_stack(stack_low_addr, stack_size(), this, |
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331 CURRENT_PC); |
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332 #endif // INCLUDE_NMT |
0 | 333 } |
334 | |
335 | |
336 Thread::~Thread() { | |
337 // Reclaim the objectmonitors from the omFreeList of the moribund thread. | |
338 ObjectSynchronizer::omFlush (this) ; | |
339 | |
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340 EVENT_THREAD_DESTRUCT(this); |
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341 |
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342 // stack_base can be NULL if the thread is never started or exited before |
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343 // record_stack_base_and_size called. Although, we would like to ensure |
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344 // that all started threads do call record_stack_base_and_size(), there is |
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345 // not proper way to enforce that. |
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346 #if INCLUDE_NMT |
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347 if (_stack_base != NULL) { |
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348 address low_stack_addr = stack_base() - stack_size(); |
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349 MemTracker::release_thread_stack(low_stack_addr, stack_size(), this); |
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350 #ifdef ASSERT |
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351 set_stack_base(NULL); |
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352 #endif |
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353 } |
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354 #endif // INCLUDE_NMT |
6197 | 355 |
0 | 356 // deallocate data structures |
357 delete resource_area(); | |
358 // since the handle marks are using the handle area, we have to deallocated the root | |
359 // handle mark before deallocating the thread's handle area, | |
360 assert(last_handle_mark() != NULL, "check we have an element"); | |
10135 | 361 delete last_handle_mark(); |
362 assert(last_handle_mark() == NULL, "check we have reached the end"); | |
0 | 363 |
364 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. | |
365 // We NULL out the fields for good hygiene. | |
366 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; | |
367 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; | |
368 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; | |
369 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; | |
370 | |
371 delete handle_area(); | |
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372 delete metadata_handles(); |
0 | 373 |
374 // osthread() can be NULL, if creation of thread failed. | |
375 if (osthread() != NULL) os::free_thread(osthread()); | |
376 | |
377 delete _SR_lock; | |
378 | |
379 // clear thread local storage if the Thread is deleting itself | |
380 if (this == Thread::current()) { | |
381 ThreadLocalStorage::set_thread(NULL); | |
382 } else { | |
383 // In the case where we're not the current thread, invalidate all the | |
384 // caches in case some code tries to get the current thread or the | |
385 // thread that was destroyed, and gets stale information. | |
386 ThreadLocalStorage::invalidate_all(); | |
387 } | |
388 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) | |
389 } | |
390 | |
391 // NOTE: dummy function for assertion purpose. | |
392 void Thread::run() { | |
393 ShouldNotReachHere(); | |
394 } | |
395 | |
396 #ifdef ASSERT | |
397 // Private method to check for dangling thread pointer | |
398 void check_for_dangling_thread_pointer(Thread *thread) { | |
399 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
400 "possibility of dangling Thread pointer"); | |
401 } | |
402 #endif | |
403 | |
404 | |
405 #ifndef PRODUCT | |
406 // Tracing method for basic thread operations | |
407 void Thread::trace(const char* msg, const Thread* const thread) { | |
408 if (!TraceThreadEvents) return; | |
409 ResourceMark rm; | |
410 ThreadCritical tc; | |
411 const char *name = "non-Java thread"; | |
412 int prio = -1; | |
413 if (thread->is_Java_thread() | |
414 && !thread->is_Compiler_thread()) { | |
415 // The Threads_lock must be held to get information about | |
416 // this thread but may not be in some situations when | |
417 // tracing thread events. | |
418 bool release_Threads_lock = false; | |
419 if (!Threads_lock->owned_by_self()) { | |
420 Threads_lock->lock(); | |
421 release_Threads_lock = true; | |
422 } | |
423 JavaThread* jt = (JavaThread *)thread; | |
424 name = (char *)jt->get_thread_name(); | |
425 oop thread_oop = jt->threadObj(); | |
426 if (thread_oop != NULL) { | |
427 prio = java_lang_Thread::priority(thread_oop); | |
428 } | |
429 if (release_Threads_lock) { | |
430 Threads_lock->unlock(); | |
431 } | |
432 } | |
433 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); | |
434 } | |
435 #endif | |
436 | |
437 | |
438 ThreadPriority Thread::get_priority(const Thread* const thread) { | |
439 trace("get priority", thread); | |
440 ThreadPriority priority; | |
441 // Can return an error! | |
442 (void)os::get_priority(thread, priority); | |
443 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); | |
444 return priority; | |
445 } | |
446 | |
447 void Thread::set_priority(Thread* thread, ThreadPriority priority) { | |
448 trace("set priority", thread); | |
449 debug_only(check_for_dangling_thread_pointer(thread);) | |
450 // Can return an error! | |
451 (void)os::set_priority(thread, priority); | |
452 } | |
453 | |
454 | |
455 void Thread::start(Thread* thread) { | |
456 trace("start", thread); | |
457 // Start is different from resume in that its safety is guaranteed by context or | |
458 // being called from a Java method synchronized on the Thread object. | |
459 if (!DisableStartThread) { | |
460 if (thread->is_Java_thread()) { | |
461 // Initialize the thread state to RUNNABLE before starting this thread. | |
462 // Can not set it after the thread started because we do not know the | |
463 // exact thread state at that time. It could be in MONITOR_WAIT or | |
464 // in SLEEPING or some other state. | |
465 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), | |
466 java_lang_Thread::RUNNABLE); | |
467 } | |
468 os::start_thread(thread); | |
469 } | |
470 } | |
471 | |
472 // Enqueue a VM_Operation to do the job for us - sometime later | |
473 void Thread::send_async_exception(oop java_thread, oop java_throwable) { | |
474 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); | |
475 VMThread::execute(vm_stop); | |
476 } | |
477 | |
478 | |
479 // | |
480 // Check if an external suspend request has completed (or has been | |
481 // cancelled). Returns true if the thread is externally suspended and | |
482 // false otherwise. | |
483 // | |
484 // The bits parameter returns information about the code path through | |
485 // the routine. Useful for debugging: | |
486 // | |
487 // set in is_ext_suspend_completed(): | |
488 // 0x00000001 - routine was entered | |
489 // 0x00000010 - routine return false at end | |
490 // 0x00000100 - thread exited (return false) | |
491 // 0x00000200 - suspend request cancelled (return false) | |
492 // 0x00000400 - thread suspended (return true) | |
493 // 0x00001000 - thread is in a suspend equivalent state (return true) | |
494 // 0x00002000 - thread is native and walkable (return true) | |
495 // 0x00004000 - thread is native_trans and walkable (needed retry) | |
496 // | |
497 // set in wait_for_ext_suspend_completion(): | |
498 // 0x00010000 - routine was entered | |
499 // 0x00020000 - suspend request cancelled before loop (return false) | |
500 // 0x00040000 - thread suspended before loop (return true) | |
501 // 0x00080000 - suspend request cancelled in loop (return false) | |
502 // 0x00100000 - thread suspended in loop (return true) | |
503 // 0x00200000 - suspend not completed during retry loop (return false) | |
504 // | |
505 | |
506 // Helper class for tracing suspend wait debug bits. | |
507 // | |
508 // 0x00000100 indicates that the target thread exited before it could | |
509 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and | |
510 // 0x00080000 each indicate a cancelled suspend request so they don't | |
511 // count as wait failures either. | |
512 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) | |
513 | |
514 class TraceSuspendDebugBits : public StackObj { | |
515 private: | |
516 JavaThread * jt; | |
517 bool is_wait; | |
518 bool called_by_wait; // meaningful when !is_wait | |
519 uint32_t * bits; | |
520 | |
521 public: | |
522 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, | |
523 uint32_t *_bits) { | |
524 jt = _jt; | |
525 is_wait = _is_wait; | |
526 called_by_wait = _called_by_wait; | |
527 bits = _bits; | |
528 } | |
529 | |
530 ~TraceSuspendDebugBits() { | |
531 if (!is_wait) { | |
532 #if 1 | |
533 // By default, don't trace bits for is_ext_suspend_completed() calls. | |
534 // That trace is very chatty. | |
535 return; | |
536 #else | |
537 if (!called_by_wait) { | |
538 // If tracing for is_ext_suspend_completed() is enabled, then only | |
539 // trace calls to it from wait_for_ext_suspend_completion() | |
540 return; | |
541 } | |
542 #endif | |
543 } | |
544 | |
545 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { | |
546 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { | |
547 MutexLocker ml(Threads_lock); // needed for get_thread_name() | |
548 ResourceMark rm; | |
549 | |
550 tty->print_cr( | |
551 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", | |
552 jt->get_thread_name(), *bits); | |
553 | |
554 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); | |
555 } | |
556 } | |
557 } | |
558 }; | |
559 #undef DEBUG_FALSE_BITS | |
560 | |
561 | |
562 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { | |
563 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); | |
564 | |
565 bool did_trans_retry = false; // only do thread_in_native_trans retry once | |
566 bool do_trans_retry; // flag to force the retry | |
567 | |
568 *bits |= 0x00000001; | |
569 | |
570 do { | |
571 do_trans_retry = false; | |
572 | |
573 if (is_exiting()) { | |
574 // Thread is in the process of exiting. This is always checked | |
575 // first to reduce the risk of dereferencing a freed JavaThread. | |
576 *bits |= 0x00000100; | |
577 return false; | |
578 } | |
579 | |
580 if (!is_external_suspend()) { | |
581 // Suspend request is cancelled. This is always checked before | |
582 // is_ext_suspended() to reduce the risk of a rogue resume | |
583 // confusing the thread that made the suspend request. | |
584 *bits |= 0x00000200; | |
585 return false; | |
586 } | |
587 | |
588 if (is_ext_suspended()) { | |
589 // thread is suspended | |
590 *bits |= 0x00000400; | |
591 return true; | |
592 } | |
593 | |
594 // Now that we no longer do hard suspends of threads running | |
595 // native code, the target thread can be changing thread state | |
596 // while we are in this routine: | |
597 // | |
598 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked | |
599 // | |
600 // We save a copy of the thread state as observed at this moment | |
601 // and make our decision about suspend completeness based on the | |
602 // copy. This closes the race where the thread state is seen as | |
603 // _thread_in_native_trans in the if-thread_blocked check, but is | |
604 // seen as _thread_blocked in if-thread_in_native_trans check. | |
605 JavaThreadState save_state = thread_state(); | |
606 | |
607 if (save_state == _thread_blocked && is_suspend_equivalent()) { | |
608 // If the thread's state is _thread_blocked and this blocking | |
609 // condition is known to be equivalent to a suspend, then we can | |
610 // consider the thread to be externally suspended. This means that | |
611 // the code that sets _thread_blocked has been modified to do | |
612 // self-suspension if the blocking condition releases. We also | |
613 // used to check for CONDVAR_WAIT here, but that is now covered by | |
614 // the _thread_blocked with self-suspension check. | |
615 // | |
616 // Return true since we wouldn't be here unless there was still an | |
617 // external suspend request. | |
618 *bits |= 0x00001000; | |
619 return true; | |
620 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) { | |
621 // Threads running native code will self-suspend on native==>VM/Java | |
622 // transitions. If its stack is walkable (should always be the case | |
623 // unless this function is called before the actual java_suspend() | |
624 // call), then the wait is done. | |
625 *bits |= 0x00002000; | |
626 return true; | |
627 } else if (!called_by_wait && !did_trans_retry && | |
628 save_state == _thread_in_native_trans && | |
629 frame_anchor()->walkable()) { | |
630 // The thread is transitioning from thread_in_native to another | |
631 // thread state. check_safepoint_and_suspend_for_native_trans() | |
632 // will force the thread to self-suspend. If it hasn't gotten | |
633 // there yet we may have caught the thread in-between the native | |
634 // code check above and the self-suspend. Lucky us. If we were | |
635 // called by wait_for_ext_suspend_completion(), then it | |
636 // will be doing the retries so we don't have to. | |
637 // | |
638 // Since we use the saved thread state in the if-statement above, | |
639 // there is a chance that the thread has already transitioned to | |
640 // _thread_blocked by the time we get here. In that case, we will | |
641 // make a single unnecessary pass through the logic below. This | |
642 // doesn't hurt anything since we still do the trans retry. | |
643 | |
644 *bits |= 0x00004000; | |
645 | |
646 // Once the thread leaves thread_in_native_trans for another | |
647 // thread state, we break out of this retry loop. We shouldn't | |
648 // need this flag to prevent us from getting back here, but | |
649 // sometimes paranoia is good. | |
650 did_trans_retry = true; | |
651 | |
652 // We wait for the thread to transition to a more usable state. | |
653 for (int i = 1; i <= SuspendRetryCount; i++) { | |
654 // We used to do an "os::yield_all(i)" call here with the intention | |
655 // that yielding would increase on each retry. However, the parameter | |
656 // is ignored on Linux which means the yield didn't scale up. Waiting | |
657 // on the SR_lock below provides a much more predictable scale up for | |
658 // the delay. It also provides a simple/direct point to check for any | |
659 // safepoint requests from the VMThread | |
660 | |
661 // temporarily drops SR_lock while doing wait with safepoint check | |
662 // (if we're a JavaThread - the WatcherThread can also call this) | |
663 // and increase delay with each retry | |
664 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
665 | |
666 // check the actual thread state instead of what we saved above | |
667 if (thread_state() != _thread_in_native_trans) { | |
668 // the thread has transitioned to another thread state so | |
669 // try all the checks (except this one) one more time. | |
670 do_trans_retry = true; | |
671 break; | |
672 } | |
673 } // end retry loop | |
674 | |
675 | |
676 } | |
677 } while (do_trans_retry); | |
678 | |
679 *bits |= 0x00000010; | |
680 return false; | |
681 } | |
682 | |
683 // | |
684 // Wait for an external suspend request to complete (or be cancelled). | |
685 // Returns true if the thread is externally suspended and false otherwise. | |
686 // | |
687 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, | |
688 uint32_t *bits) { | |
689 TraceSuspendDebugBits tsdb(this, true /* is_wait */, | |
690 false /* !called_by_wait */, bits); | |
691 | |
692 // local flag copies to minimize SR_lock hold time | |
693 bool is_suspended; | |
694 bool pending; | |
695 uint32_t reset_bits; | |
696 | |
697 // set a marker so is_ext_suspend_completed() knows we are the caller | |
698 *bits |= 0x00010000; | |
699 | |
700 // We use reset_bits to reinitialize the bits value at the top of | |
701 // each retry loop. This allows the caller to make use of any | |
702 // unused bits for their own marking purposes. | |
703 reset_bits = *bits; | |
704 | |
705 { | |
706 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
707 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
708 delay, bits); | |
709 pending = is_external_suspend(); | |
710 } | |
711 // must release SR_lock to allow suspension to complete | |
712 | |
713 if (!pending) { | |
714 // A cancelled suspend request is the only false return from | |
715 // is_ext_suspend_completed() that keeps us from entering the | |
716 // retry loop. | |
717 *bits |= 0x00020000; | |
718 return false; | |
719 } | |
720 | |
721 if (is_suspended) { | |
722 *bits |= 0x00040000; | |
723 return true; | |
724 } | |
725 | |
726 for (int i = 1; i <= retries; i++) { | |
727 *bits = reset_bits; // reinit to only track last retry | |
728 | |
729 // We used to do an "os::yield_all(i)" call here with the intention | |
730 // that yielding would increase on each retry. However, the parameter | |
731 // is ignored on Linux which means the yield didn't scale up. Waiting | |
732 // on the SR_lock below provides a much more predictable scale up for | |
733 // the delay. It also provides a simple/direct point to check for any | |
734 // safepoint requests from the VMThread | |
735 | |
736 { | |
737 MutexLocker ml(SR_lock()); | |
738 // wait with safepoint check (if we're a JavaThread - the WatcherThread | |
739 // can also call this) and increase delay with each retry | |
740 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
741 | |
742 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
743 delay, bits); | |
744 | |
745 // It is possible for the external suspend request to be cancelled | |
746 // (by a resume) before the actual suspend operation is completed. | |
747 // Refresh our local copy to see if we still need to wait. | |
748 pending = is_external_suspend(); | |
749 } | |
750 | |
751 if (!pending) { | |
752 // A cancelled suspend request is the only false return from | |
753 // is_ext_suspend_completed() that keeps us from staying in the | |
754 // retry loop. | |
755 *bits |= 0x00080000; | |
756 return false; | |
757 } | |
758 | |
759 if (is_suspended) { | |
760 *bits |= 0x00100000; | |
761 return true; | |
762 } | |
763 } // end retry loop | |
764 | |
765 // thread did not suspend after all our retries | |
766 *bits |= 0x00200000; | |
767 return false; | |
768 } | |
769 | |
770 #ifndef PRODUCT | |
771 void JavaThread::record_jump(address target, address instr, const char* file, int line) { | |
772 | |
773 // This should not need to be atomic as the only way for simultaneous | |
774 // updates is via interrupts. Even then this should be rare or non-existant | |
775 // and we don't care that much anyway. | |
776 | |
777 int index = _jmp_ring_index; | |
778 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); | |
779 _jmp_ring[index]._target = (intptr_t) target; | |
780 _jmp_ring[index]._instruction = (intptr_t) instr; | |
781 _jmp_ring[index]._file = file; | |
782 _jmp_ring[index]._line = line; | |
783 } | |
784 #endif /* PRODUCT */ | |
785 | |
786 // Called by flat profiler | |
787 // Callers have already called wait_for_ext_suspend_completion | |
788 // The assertion for that is currently too complex to put here: | |
789 bool JavaThread::profile_last_Java_frame(frame* _fr) { | |
790 bool gotframe = false; | |
791 // self suspension saves needed state. | |
792 if (has_last_Java_frame() && _anchor.walkable()) { | |
793 *_fr = pd_last_frame(); | |
794 gotframe = true; | |
795 } | |
796 return gotframe; | |
797 } | |
798 | |
799 void Thread::interrupt(Thread* thread) { | |
800 trace("interrupt", thread); | |
801 debug_only(check_for_dangling_thread_pointer(thread);) | |
802 os::interrupt(thread); | |
803 } | |
804 | |
805 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { | |
806 trace("is_interrupted", thread); | |
807 debug_only(check_for_dangling_thread_pointer(thread);) | |
808 // Note: If clear_interrupted==false, this simply fetches and | |
809 // returns the value of the field osthread()->interrupted(). | |
810 return os::is_interrupted(thread, clear_interrupted); | |
811 } | |
812 | |
813 | |
814 // GC Support | |
815 bool Thread::claim_oops_do_par_case(int strong_roots_parity) { | |
816 jint thread_parity = _oops_do_parity; | |
817 if (thread_parity != strong_roots_parity) { | |
818 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); | |
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819 if (res == thread_parity) { |
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820 return true; |
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821 } else { |
0 | 822 guarantee(res == strong_roots_parity, "Or else what?"); |
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823 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
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824 "Should only fail when parallel."); |
0 | 825 return false; |
826 } | |
827 } | |
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828 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
0 | 829 "Should only fail when parallel."); |
830 return false; | |
831 } | |
832 | |
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833 void Thread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 834 active_handles()->oops_do(f); |
835 // Do oop for ThreadShadow | |
836 f->do_oop((oop*)&_pending_exception); | |
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837 f->do_oop((oop*)&_pending_failed_speculation); |
0 | 838 handle_area()->oops_do(f); |
839 } | |
840 | |
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841 void Thread::nmethods_do(CodeBlobClosure* cf) { |
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842 // no nmethods in a generic thread... |
0 | 843 } |
844 | |
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845 void Thread::metadata_do(void f(Metadata*)) { |
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846 if (metadata_handles() != NULL) { |
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847 for (int i = 0; i< metadata_handles()->length(); i++) { |
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848 f(metadata_handles()->at(i)); |
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849 } |
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850 } |
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851 } |
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852 |
0 | 853 void Thread::print_on(outputStream* st) const { |
854 // get_priority assumes osthread initialized | |
855 if (osthread() != NULL) { | |
6766 | 856 int os_prio; |
857 if (os::get_native_priority(this, &os_prio) == OS_OK) { | |
858 st->print("os_prio=%d ", os_prio); | |
859 } | |
860 st->print("tid=" INTPTR_FORMAT " ", this); | |
0 | 861 osthread()->print_on(st); |
862 } | |
863 debug_only(if (WizardMode) print_owned_locks_on(st);) | |
864 } | |
865 | |
866 // Thread::print_on_error() is called by fatal error handler. Don't use | |
867 // any lock or allocate memory. | |
868 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { | |
869 if (is_VM_thread()) st->print("VMThread"); | |
870 else if (is_Compiler_thread()) st->print("CompilerThread"); | |
871 else if (is_Java_thread()) st->print("JavaThread"); | |
872 else if (is_GC_task_thread()) st->print("GCTaskThread"); | |
873 else if (is_Watcher_thread()) st->print("WatcherThread"); | |
874 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); | |
875 else st->print("Thread"); | |
876 | |
877 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", | |
878 _stack_base - _stack_size, _stack_base); | |
879 | |
880 if (osthread()) { | |
881 st->print(" [id=%d]", osthread()->thread_id()); | |
882 } | |
883 } | |
884 | |
885 #ifdef ASSERT | |
886 void Thread::print_owned_locks_on(outputStream* st) const { | |
887 Monitor *cur = _owned_locks; | |
888 if (cur == NULL) { | |
889 st->print(" (no locks) "); | |
890 } else { | |
891 st->print_cr(" Locks owned:"); | |
892 while(cur) { | |
893 cur->print_on(st); | |
894 cur = cur->next(); | |
895 } | |
896 } | |
897 } | |
898 | |
899 static int ref_use_count = 0; | |
900 | |
901 bool Thread::owns_locks_but_compiled_lock() const { | |
902 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
903 if (cur != Compile_lock) return true; | |
904 } | |
905 return false; | |
906 } | |
907 | |
908 | |
909 #endif | |
910 | |
911 #ifndef PRODUCT | |
912 | |
913 // The flag: potential_vm_operation notifies if this particular safepoint state could potential | |
914 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that | |
915 // no threads which allow_vm_block's are held | |
916 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { | |
917 // Check if current thread is allowed to block at a safepoint | |
918 if (!(_allow_safepoint_count == 0)) | |
919 fatal("Possible safepoint reached by thread that does not allow it"); | |
920 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { | |
921 fatal("LEAF method calling lock?"); | |
922 } | |
923 | |
924 #ifdef ASSERT | |
925 if (potential_vm_operation && is_Java_thread() | |
926 && !Universe::is_bootstrapping()) { | |
927 // Make sure we do not hold any locks that the VM thread also uses. | |
928 // This could potentially lead to deadlocks | |
929 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
930 // Threads_lock is special, since the safepoint synchronization will not start before this is | |
931 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, | |
932 // since it is used to transfer control between JavaThreads and the VMThread | |
933 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! | |
934 if ( (cur->allow_vm_block() && | |
935 cur != Threads_lock && | |
936 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation | |
937 cur != VMOperationRequest_lock && | |
938 cur != VMOperationQueue_lock) || | |
939 cur->rank() == Mutex::special) { | |
940 warning("Thread holding lock at safepoint that vm can block on: %s", cur->name()); | |
941 } | |
942 } | |
943 } | |
944 | |
945 if (GCALotAtAllSafepoints) { | |
946 // We could enter a safepoint here and thus have a gc | |
947 InterfaceSupport::check_gc_alot(); | |
948 } | |
949 #endif | |
950 } | |
951 #endif | |
952 | |
953 bool Thread::is_in_stack(address adr) const { | |
954 assert(Thread::current() == this, "is_in_stack can only be called from current thread"); | |
955 address end = os::current_stack_pointer(); | |
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956 // Allow non Java threads to call this without stack_base |
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957 if (_stack_base == NULL) return true; |
0 | 958 if (stack_base() >= adr && adr >= end) return true; |
959 | |
960 return false; | |
961 } | |
962 | |
963 | |
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964 bool Thread::is_in_usable_stack(address adr) const { |
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965 size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0; |
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966 size_t usable_stack_size = _stack_size - stack_guard_size; |
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967 |
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968 return ((adr < stack_base()) && (adr >= stack_base() - usable_stack_size)); |
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969 } |
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970 |
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971 |
0 | 972 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter |
973 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being | |
974 // used for compilation in the future. If that change is made, the need for these methods | |
975 // should be revisited, and they should be removed if possible. | |
976 | |
977 bool Thread::is_lock_owned(address adr) const { | |
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978 return on_local_stack(adr); |
0 | 979 } |
980 | |
981 bool Thread::set_as_starting_thread() { | |
982 // NOTE: this must be called inside the main thread. | |
983 return os::create_main_thread((JavaThread*)this); | |
984 } | |
985 | |
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986 static void initialize_class(Symbol* class_name, TRAPS) { |
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987 Klass* klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
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988 InstanceKlass::cast(klass)->initialize(CHECK); |
0 | 989 } |
990 | |
991 | |
992 // Creates the initial ThreadGroup | |
993 static Handle create_initial_thread_group(TRAPS) { | |
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994 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
0 | 995 instanceKlassHandle klass (THREAD, k); |
996 | |
997 Handle system_instance = klass->allocate_instance_handle(CHECK_NH); | |
998 { | |
999 JavaValue result(T_VOID); | |
1000 JavaCalls::call_special(&result, | |
1001 system_instance, | |
1002 klass, | |
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1003 vmSymbols::object_initializer_name(), |
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1004 vmSymbols::void_method_signature(), |
0 | 1005 CHECK_NH); |
1006 } | |
1007 Universe::set_system_thread_group(system_instance()); | |
1008 | |
1009 Handle main_instance = klass->allocate_instance_handle(CHECK_NH); | |
1010 { | |
1011 JavaValue result(T_VOID); | |
1012 Handle string = java_lang_String::create_from_str("main", CHECK_NH); | |
1013 JavaCalls::call_special(&result, | |
1014 main_instance, | |
1015 klass, | |
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1016 vmSymbols::object_initializer_name(), |
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1017 vmSymbols::threadgroup_string_void_signature(), |
0 | 1018 system_instance, |
1019 string, | |
1020 CHECK_NH); | |
1021 } | |
1022 return main_instance; | |
1023 } | |
1024 | |
1025 // Creates the initial Thread | |
1026 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { | |
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1027 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
0 | 1028 instanceKlassHandle klass (THREAD, k); |
1029 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); | |
1030 | |
1031 java_lang_Thread::set_thread(thread_oop(), thread); | |
1032 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1033 thread->set_threadObj(thread_oop()); | |
1034 | |
1035 Handle string = java_lang_String::create_from_str("main", CHECK_NULL); | |
1036 | |
1037 JavaValue result(T_VOID); | |
1038 JavaCalls::call_special(&result, thread_oop, | |
1039 klass, | |
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1040 vmSymbols::object_initializer_name(), |
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1041 vmSymbols::threadgroup_string_void_signature(), |
0 | 1042 thread_group, |
1043 string, | |
1044 CHECK_NULL); | |
1045 return thread_oop(); | |
1046 } | |
1047 | |
1048 static void call_initializeSystemClass(TRAPS) { | |
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1049 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1050 instanceKlassHandle klass (THREAD, k); |
1051 | |
1052 JavaValue result(T_VOID); | |
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1053 JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
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1054 vmSymbols::void_method_signature(), CHECK); |
0 | 1055 } |
1056 | |
6181 | 1057 char java_runtime_name[128] = ""; |
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1058 char java_runtime_version[128] = ""; |
6181 | 1059 |
1060 // extract the JRE name from sun.misc.Version.java_runtime_name | |
1061 static const char* get_java_runtime_name(TRAPS) { | |
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1062 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
6181 | 1063 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
1064 fieldDescriptor fd; | |
1065 bool found = k != NULL && | |
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1066 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_name_name(), |
6181 | 1067 vmSymbols::string_signature(), &fd); |
1068 if (found) { | |
1069 oop name_oop = k->java_mirror()->obj_field(fd.offset()); | |
1070 if (name_oop == NULL) | |
1071 return NULL; | |
1072 const char* name = java_lang_String::as_utf8_string(name_oop, | |
1073 java_runtime_name, | |
1074 sizeof(java_runtime_name)); | |
1075 return name; | |
1076 } else { | |
1077 return NULL; | |
1078 } | |
1079 } | |
1080 | |
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1081 // extract the JRE version from sun.misc.Version.java_runtime_version |
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1082 static const char* get_java_runtime_version(TRAPS) { |
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1083 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
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1084 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
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1085 fieldDescriptor fd; |
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1086 bool found = k != NULL && |
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1087 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_version_name(), |
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1088 vmSymbols::string_signature(), &fd); |
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1089 if (found) { |
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1090 oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
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1091 if (name_oop == NULL) |
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1092 return NULL; |
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1093 const char* name = java_lang_String::as_utf8_string(name_oop, |
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1094 java_runtime_version, |
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1095 sizeof(java_runtime_version)); |
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1096 return name; |
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1097 } else { |
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1098 return NULL; |
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1099 } |
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1100 } |
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1101 |
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1102 // General purpose hook into Java code, run once when the VM is initialized. |
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1103 // The Java library method itself may be changed independently from the VM. |
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1104 static void call_postVMInitHook(TRAPS) { |
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1105 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_PostVMInitHook(), THREAD); |
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1106 instanceKlassHandle klass (THREAD, k); |
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1107 if (klass.not_null()) { |
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1108 JavaValue result(T_VOID); |
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1109 JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
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1110 vmSymbols::void_method_signature(), |
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1111 CHECK); |
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1112 } |
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1113 } |
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1114 |
0 | 1115 static void reset_vm_info_property(TRAPS) { |
1116 // the vm info string | |
1117 ResourceMark rm(THREAD); | |
1118 const char *vm_info = VM_Version::vm_info_string(); | |
1119 | |
1120 // java.lang.System class | |
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1121 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1122 instanceKlassHandle klass (THREAD, k); |
1123 | |
1124 // setProperty arguments | |
1125 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); | |
1126 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); | |
1127 | |
1128 // return value | |
1129 JavaValue r(T_OBJECT); | |
1130 | |
1131 // public static String setProperty(String key, String value); | |
1132 JavaCalls::call_static(&r, | |
1133 klass, | |
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1134 vmSymbols::setProperty_name(), |
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1135 vmSymbols::string_string_string_signature(), |
0 | 1136 key_str, |
1137 value_str, | |
1138 CHECK); | |
1139 } | |
1140 | |
1141 | |
1142 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { | |
1143 assert(thread_group.not_null(), "thread group should be specified"); | |
1144 assert(threadObj() == NULL, "should only create Java thread object once"); | |
1145 | |
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1146 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 1147 instanceKlassHandle klass (THREAD, k); |
1148 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
1149 | |
1150 java_lang_Thread::set_thread(thread_oop(), this); | |
1151 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1152 set_threadObj(thread_oop()); | |
1153 | |
1154 JavaValue result(T_VOID); | |
1155 if (thread_name != NULL) { | |
1156 Handle name = java_lang_String::create_from_str(thread_name, CHECK); | |
1157 // Thread gets assigned specified name and null target | |
1158 JavaCalls::call_special(&result, | |
1159 thread_oop, | |
1160 klass, | |
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1161 vmSymbols::object_initializer_name(), |
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1162 vmSymbols::threadgroup_string_void_signature(), |
0 | 1163 thread_group, // Argument 1 |
1164 name, // Argument 2 | |
1165 THREAD); | |
1166 } else { | |
1167 // Thread gets assigned name "Thread-nnn" and null target | |
1168 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) | |
1169 JavaCalls::call_special(&result, | |
1170 thread_oop, | |
1171 klass, | |
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1172 vmSymbols::object_initializer_name(), |
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1173 vmSymbols::threadgroup_runnable_void_signature(), |
0 | 1174 thread_group, // Argument 1 |
1175 Handle(), // Argument 2 | |
1176 THREAD); | |
1177 } | |
1178 | |
1179 | |
1180 if (daemon) { | |
1181 java_lang_Thread::set_daemon(thread_oop()); | |
1182 } | |
1183 | |
1184 if (HAS_PENDING_EXCEPTION) { | |
1185 return; | |
1186 } | |
1187 | |
1142 | 1188 KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
0 | 1189 Handle threadObj(this, this->threadObj()); |
1190 | |
1191 JavaCalls::call_special(&result, | |
1192 thread_group, | |
1193 group, | |
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1194 vmSymbols::add_method_name(), |
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1195 vmSymbols::thread_void_signature(), |
0 | 1196 threadObj, // Arg 1 |
1197 THREAD); | |
1198 | |
1199 | |
1200 } | |
1201 | |
1202 // NamedThread -- non-JavaThread subclasses with multiple | |
1203 // uniquely named instances should derive from this. | |
1204 NamedThread::NamedThread() : Thread() { | |
1205 _name = NULL; | |
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1206 _processed_thread = NULL; |
0 | 1207 } |
1208 | |
1209 NamedThread::~NamedThread() { | |
1210 if (_name != NULL) { | |
6197 | 1211 FREE_C_HEAP_ARRAY(char, _name, mtThread); |
0 | 1212 _name = NULL; |
1213 } | |
1214 } | |
1215 | |
1216 void NamedThread::set_name(const char* format, ...) { | |
1217 guarantee(_name == NULL, "Only get to set name once."); | |
6197 | 1218 _name = NEW_C_HEAP_ARRAY(char, max_name_len, mtThread); |
0 | 1219 guarantee(_name != NULL, "alloc failure"); |
1220 va_list ap; | |
1221 va_start(ap, format); | |
1222 jio_vsnprintf(_name, max_name_len, format, ap); | |
1223 va_end(ap); | |
1224 } | |
1225 | |
1226 // ======= WatcherThread ======== | |
1227 | |
1228 // The watcher thread exists to simulate timer interrupts. It should | |
1229 // be replaced by an abstraction over whatever native support for | |
1230 // timer interrupts exists on the platform. | |
1231 | |
1232 WatcherThread* WatcherThread::_watcher_thread = NULL; | |
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1233 bool WatcherThread::_startable = false; |
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1234 volatile bool WatcherThread::_should_terminate = false; |
0 | 1235 |
11151 | 1236 WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) { |
0 | 1237 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); |
1238 if (os::create_thread(this, os::watcher_thread)) { | |
1239 _watcher_thread = this; | |
1240 | |
1241 // Set the watcher thread to the highest OS priority which should not be | |
1242 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY | |
1243 // is created. The only normal thread using this priority is the reference | |
1244 // handler thread, which runs for very short intervals only. | |
1245 // If the VMThread's priority is not lower than the WatcherThread profiling | |
1246 // will be inaccurate. | |
1247 os::set_priority(this, MaxPriority); | |
1248 if (!DisableStartThread) { | |
1249 os::start_thread(this); | |
1250 } | |
1251 } | |
1252 } | |
1253 | |
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1254 int WatcherThread::sleep() const { |
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1255 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1256 |
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1257 // remaining will be zero if there are no tasks, |
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1258 // causing the WatcherThread to sleep until a task is |
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1259 // enrolled |
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1260 int remaining = PeriodicTask::time_to_wait(); |
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1261 int time_slept = 0; |
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1262 |
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1263 // we expect this to timeout - we only ever get unparked when |
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1264 // we should terminate or when a new task has been enrolled |
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1265 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
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1266 |
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1267 jlong time_before_loop = os::javaTimeNanos(); |
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1268 |
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1269 for (;;) { |
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1270 bool timedout = PeriodicTask_lock->wait(Mutex::_no_safepoint_check_flag, remaining); |
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1271 jlong now = os::javaTimeNanos(); |
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1272 |
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1273 if (remaining == 0) { |
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1274 // if we didn't have any tasks we could have waited for a long time |
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1275 // consider the time_slept zero and reset time_before_loop |
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1276 time_slept = 0; |
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1277 time_before_loop = now; |
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1278 } else { |
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1279 // need to recalulate since we might have new tasks in _tasks |
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1280 time_slept = (int) ((now - time_before_loop) / 1000000); |
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1281 } |
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1282 |
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1283 // Change to task list or spurious wakeup of some kind |
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1284 if (timedout || _should_terminate) { |
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1285 break; |
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1286 } |
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1287 |
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1288 remaining = PeriodicTask::time_to_wait(); |
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1289 if (remaining == 0) { |
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1290 // Last task was just disenrolled so loop around and wait until |
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1291 // another task gets enrolled |
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1292 continue; |
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1293 } |
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1294 |
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1295 remaining -= time_slept; |
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1296 if (remaining <= 0) |
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1297 break; |
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1298 } |
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1299 |
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1300 return time_slept; |
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1301 } |
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1302 |
0 | 1303 void WatcherThread::run() { |
1304 assert(this == watcher_thread(), "just checking"); | |
1305 | |
1306 this->record_stack_base_and_size(); | |
1307 this->initialize_thread_local_storage(); | |
1308 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1309 while(!_should_terminate) { | |
1310 assert(watcher_thread() == Thread::current(), "thread consistency check"); | |
1311 assert(watcher_thread() == this, "thread consistency check"); | |
1312 | |
1313 // Calculate how long it'll be until the next PeriodicTask work | |
1314 // should be done, and sleep that amount of time. | |
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1315 int time_waited = sleep(); |
0 | 1316 |
1317 if (is_error_reported()) { | |
1318 // A fatal error has happened, the error handler(VMError::report_and_die) | |
1319 // should abort JVM after creating an error log file. However in some | |
1320 // rare cases, the error handler itself might deadlock. Here we try to | |
1321 // kill JVM if the fatal error handler fails to abort in 2 minutes. | |
1322 // | |
1323 // This code is in WatcherThread because WatcherThread wakes up | |
1324 // periodically so the fatal error handler doesn't need to do anything; | |
1325 // also because the WatcherThread is less likely to crash than other | |
1326 // threads. | |
1327 | |
1328 for (;;) { | |
1329 if (!ShowMessageBoxOnError | |
1330 && (OnError == NULL || OnError[0] == '\0') | |
1331 && Arguments::abort_hook() == NULL) { | |
1332 os::sleep(this, 2 * 60 * 1000, false); | |
1333 fdStream err(defaultStream::output_fd()); | |
1334 err.print_raw_cr("# [ timer expired, abort... ]"); | |
1335 // skip atexit/vm_exit/vm_abort hooks | |
1336 os::die(); | |
1337 } | |
1338 | |
1339 // Wake up 5 seconds later, the fatal handler may reset OnError or | |
1340 // ShowMessageBoxOnError when it is ready to abort. | |
1341 os::sleep(this, 5 * 1000, false); | |
1342 } | |
1343 } | |
1344 | |
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1345 PeriodicTask::real_time_tick(time_waited); |
0 | 1346 } |
1347 | |
1348 // Signal that it is terminated | |
1349 { | |
1350 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); | |
1351 _watcher_thread = NULL; | |
1352 Terminator_lock->notify(); | |
1353 } | |
1354 | |
1355 // Thread destructor usually does this.. | |
1356 ThreadLocalStorage::set_thread(NULL); | |
1357 } | |
1358 | |
1359 void WatcherThread::start() { | |
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1360 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1361 |
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1362 if (watcher_thread() == NULL && _startable) { |
0 | 1363 _should_terminate = false; |
1364 // Create the single instance of WatcherThread | |
1365 new WatcherThread(); | |
1366 } | |
1367 } | |
1368 | |
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1369 void WatcherThread::make_startable() { |
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1370 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1371 _startable = true; |
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1372 } |
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1373 |
0 | 1374 void WatcherThread::stop() { |
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1375 { |
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1376 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1377 _should_terminate = true; |
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1378 OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
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1379 |
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1380 WatcherThread* watcher = watcher_thread(); |
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1381 if (watcher != NULL) |
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1382 watcher->unpark(); |
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1383 } |
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1384 |
0 | 1385 // it is ok to take late safepoints here, if needed |
1386 MutexLocker mu(Terminator_lock); | |
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1387 |
0 | 1388 while(watcher_thread() != NULL) { |
1389 // This wait should make safepoint checks, wait without a timeout, | |
1390 // and wait as a suspend-equivalent condition. | |
1391 // | |
1392 // Note: If the FlatProfiler is running, then this thread is waiting | |
1393 // for the WatcherThread to terminate and the WatcherThread, via the | |
1394 // FlatProfiler task, is waiting for the external suspend request on | |
1395 // this thread to complete. wait_for_ext_suspend_completion() will | |
1396 // eventually timeout, but that takes time. Making this wait a | |
1397 // suspend-equivalent condition solves that timeout problem. | |
1398 // | |
1399 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
1400 Mutex::_as_suspend_equivalent_flag); | |
1401 } | |
1402 } | |
1403 | |
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1404 void WatcherThread::unpark() { |
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1405 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1406 PeriodicTask_lock->notify(); |
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1407 } |
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1408 |
0 | 1409 void WatcherThread::print_on(outputStream* st) const { |
1410 st->print("\"%s\" ", name()); | |
1411 Thread::print_on(st); | |
1412 st->cr(); | |
1413 } | |
1414 | |
1415 // ======= JavaThread ======== | |
1416 | |
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1417 #ifdef GRAAL |
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1418 |
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1419 #if GRAAL_COUNTERS_SIZE > 0 |
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1420 jlong JavaThread::_graal_old_thread_counters[GRAAL_COUNTERS_SIZE]; |
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1421 |
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1422 bool graal_counters_include(oop threadObj) { |
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1423 return !GRAAL_COUNTERS_EXCLUDE_COMPILER_THREADS || threadObj == NULL || threadObj->klass() != SystemDictionary::CompilerThread_klass(); |
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1424 } |
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1425 |
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1426 void JavaThread::collect_counters(typeArrayOop array) { |
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1427 MutexLocker tl(Threads_lock); |
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1428 for (int i = 0; i < array->length(); i++) { |
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1429 array->long_at_put(i, _graal_old_thread_counters[i]); |
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1430 } |
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1431 for (JavaThread* tp = Threads::first(); tp != NULL; tp = tp->next()) { |
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1432 if (graal_counters_include(tp->threadObj())) { |
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1433 for (int i = 0; i < array->length(); i++) { |
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1434 array->long_at_put(i, array->long_at(i) + tp->_graal_counters[i]); |
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1435 } |
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1436 } |
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1437 } |
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1438 } |
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1439 #else |
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1440 void JavaThread::collect_counters(typeArrayOop array) { |
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1441 // empty |
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1442 } |
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1443 #endif // GRAAL_COUNTERS_SIZE > 0 |
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1444 |
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1445 #endif // GRAAL |
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1446 |
0 | 1447 // A JavaThread is a normal Java thread |
1448 | |
1449 void JavaThread::initialize() { | |
1450 // Initialize fields | |
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1451 |
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1452 // Set the claimed par_id to -1 (ie not claiming any par_ids) |
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1453 set_claimed_par_id(-1); |
3555
22d11b3bc561
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1454 |
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1455 _buffer_blob = NULL; |
0 | 1456 set_saved_exception_pc(NULL); |
1457 set_threadObj(NULL); | |
1458 _anchor.clear(); | |
1459 set_entry_point(NULL); | |
1460 set_jni_functions(jni_functions()); | |
1461 set_callee_target(NULL); | |
1462 set_vm_result(NULL); | |
1463 set_vm_result_2(NULL); | |
1464 set_vframe_array_head(NULL); | |
1465 set_vframe_array_last(NULL); | |
1466 set_deferred_locals(NULL); | |
1467 set_deopt_mark(NULL); | |
1814
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1468 set_deopt_nmethod(NULL); |
0 | 1469 clear_must_deopt_id(); |
1470 set_monitor_chunks(NULL); | |
1471 set_next(NULL); | |
1472 set_thread_state(_thread_new); | |
6854
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1473 #if INCLUDE_NMT |
6197 | 1474 set_recorder(NULL); |
6854
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1475 #endif |
0 | 1476 _terminated = _not_terminated; |
1477 _privileged_stack_top = NULL; | |
1478 _array_for_gc = NULL; | |
1479 _suspend_equivalent = false; | |
1480 _in_deopt_handler = 0; | |
1481 _doing_unsafe_access = false; | |
1482 _stack_guard_state = stack_guard_unused; | |
5747
120820e30baa
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|
1483 #ifdef GRAAL |
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1484 _graal_alternate_call_target = NULL; |
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|
1485 _graal_implicit_exception_pc = NULL; |
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1486 _graal_compiling = false; |
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1487 #if GRAAL_COUNTERS_SIZE > 0 |
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1488 for (int i = 0; i < GRAAL_COUNTERS_SIZE; i++) { |
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1489 _graal_counters[i] = 0; |
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1490 } |
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1491 #endif // GRAAL_COUNTER_SIZE > 0 |
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1492 #endif // GRAAL |
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|
1493 (void)const_cast<oop&>(_exception_oop = NULL); |
0 | 1494 _exception_pc = 0; |
1495 _exception_handler_pc = 0; | |
1903 | 1496 _is_method_handle_return = 0; |
0 | 1497 _jvmti_thread_state= NULL; |
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1498 _should_post_on_exceptions_flag = JNI_FALSE; |
0 | 1499 _jvmti_get_loaded_classes_closure = NULL; |
1500 _interp_only_mode = 0; | |
1501 _special_runtime_exit_condition = _no_async_condition; | |
1502 _pending_async_exception = NULL; | |
1503 _thread_stat = NULL; | |
1504 _thread_stat = new ThreadStatistics(); | |
1505 _blocked_on_compilation = false; | |
1506 _jni_active_critical = 0; | |
1507 _do_not_unlock_if_synchronized = false; | |
1508 _cached_monitor_info = NULL; | |
1509 _parker = Parker::Allocate(this) ; | |
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|
1510 _scanned_nmethod = NULL; |
0 | 1511 |
1512 #ifndef PRODUCT | |
1513 _jmp_ring_index = 0; | |
1514 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { | |
1515 record_jump(NULL, NULL, NULL, 0); | |
1516 } | |
1517 #endif /* PRODUCT */ | |
1518 | |
1519 set_thread_profiler(NULL); | |
1520 if (FlatProfiler::is_active()) { | |
1521 // This is where we would decide to either give each thread it's own profiler | |
1522 // or use one global one from FlatProfiler, | |
1523 // or up to some count of the number of profiled threads, etc. | |
1524 ThreadProfiler* pp = new ThreadProfiler(); | |
1525 pp->engage(); | |
1526 set_thread_profiler(pp); | |
1527 } | |
1528 | |
1529 // Setup safepoint state info for this thread | |
1530 ThreadSafepointState::create(this); | |
1531 | |
1532 debug_only(_java_call_counter = 0); | |
1533 | |
1534 // JVMTI PopFrame support | |
1535 _popframe_condition = popframe_inactive; | |
1536 _popframe_preserved_args = NULL; | |
1537 _popframe_preserved_args_size = 0; | |
1538 | |
1539 pd_initialize(); | |
1540 } | |
1541 | |
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1542 #if INCLUDE_ALL_GCS |
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1543 SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
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1544 DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
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1545 #endif // INCLUDE_ALL_GCS |
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1546 |
4006 | 1547 JavaThread::JavaThread(bool is_attaching_via_jni) : |
342
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1548 Thread() |
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1549 #if INCLUDE_ALL_GCS |
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1550 , _satb_mark_queue(&_satb_mark_queue_set), |
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1551 _dirty_card_queue(&_dirty_card_queue_set) |
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1552 #endif // INCLUDE_ALL_GCS |
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1553 { |
0 | 1554 initialize(); |
4006 | 1555 if (is_attaching_via_jni) { |
1556 _jni_attach_state = _attaching_via_jni; | |
1557 } else { | |
1558 _jni_attach_state = _not_attaching_via_jni; | |
1559 } | |
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|
1560 assert(deferred_card_mark().is_empty(), "Default MemRegion ctor"); |
6197 | 1561 _safepoint_visible = false; |
0 | 1562 } |
1563 | |
1564 bool JavaThread::reguard_stack(address cur_sp) { | |
1565 if (_stack_guard_state != stack_guard_yellow_disabled) { | |
1566 return true; // Stack already guarded or guard pages not needed. | |
1567 } | |
1568 | |
1569 if (register_stack_overflow()) { | |
1570 // For those architectures which have separate register and | |
1571 // memory stacks, we must check the register stack to see if | |
1572 // it has overflowed. | |
1573 return false; | |
1574 } | |
1575 | |
1576 // Java code never executes within the yellow zone: the latter is only | |
1577 // there to provoke an exception during stack banging. If java code | |
1578 // is executing there, either StackShadowPages should be larger, or | |
1579 // some exception code in c1, c2 or the interpreter isn't unwinding | |
1580 // when it should. | |
1581 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); | |
1582 | |
1583 enable_stack_yellow_zone(); | |
1584 return true; | |
1585 } | |
1586 | |
1587 bool JavaThread::reguard_stack(void) { | |
1588 return reguard_stack(os::current_stack_pointer()); | |
1589 } | |
1590 | |
1591 | |
1592 void JavaThread::block_if_vm_exited() { | |
1593 if (_terminated == _vm_exited) { | |
1594 // _vm_exited is set at safepoint, and Threads_lock is never released | |
1595 // we will block here forever | |
1596 Threads_lock->lock_without_safepoint_check(); | |
1597 ShouldNotReachHere(); | |
1598 } | |
1599 } | |
1600 | |
1601 | |
1602 // Remove this ifdef when C1 is ported to the compiler interface. | |
1603 static void compiler_thread_entry(JavaThread* thread, TRAPS); | |
1604 | |
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1605 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
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1606 Thread() |
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1607 #if INCLUDE_ALL_GCS |
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1608 , _satb_mark_queue(&_satb_mark_queue_set), |
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1609 _dirty_card_queue(&_dirty_card_queue_set) |
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1610 #endif // INCLUDE_ALL_GCS |
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1611 { |
0 | 1612 if (TraceThreadEvents) { |
1613 tty->print_cr("creating thread %p", this); | |
1614 } | |
1615 initialize(); | |
4006 | 1616 _jni_attach_state = _not_attaching_via_jni; |
0 | 1617 set_entry_point(entry_point); |
1618 // Create the native thread itself. | |
1619 // %note runtime_23 | |
1620 os::ThreadType thr_type = os::java_thread; | |
1621 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : | |
1622 os::java_thread; | |
1623 os::create_thread(this, thr_type, stack_sz); | |
6197 | 1624 _safepoint_visible = false; |
0 | 1625 // The _osthread may be NULL here because we ran out of memory (too many threads active). |
1626 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller | |
1627 // may hold a lock and all locks must be unlocked before throwing the exception (throwing | |
1628 // the exception consists of creating the exception object & initializing it, initialization | |
1629 // will leave the VM via a JavaCall and then all locks must be unlocked). | |
1630 // | |
1631 // The thread is still suspended when we reach here. Thread must be explicit started | |
1632 // by creator! Furthermore, the thread must also explicitly be added to the Threads list | |
1633 // by calling Threads:add. The reason why this is not done here, is because the thread | |
1634 // object must be fully initialized (take a look at JVM_Start) | |
1635 } | |
1636 | |
1637 JavaThread::~JavaThread() { | |
1638 if (TraceThreadEvents) { | |
1639 tty->print_cr("terminate thread %p", this); | |
1640 } | |
1641 | |
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1642 // By now, this thread should already be invisible to safepoint, |
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1643 // and its per-thread recorder also collected. |
6197 | 1644 assert(!is_safepoint_visible(), "wrong state"); |
6882
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1645 #if INCLUDE_NMT |
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|
1646 assert(get_recorder() == NULL, "Already collected"); |
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1647 #endif // INCLUDE_NMT |
6197 | 1648 |
0 | 1649 // JSR166 -- return the parker to the free list |
1650 Parker::Release(_parker); | |
1651 _parker = NULL ; | |
1652 | |
1653 // Free any remaining previous UnrollBlock | |
1654 vframeArray* old_array = vframe_array_last(); | |
1655 | |
1656 if (old_array != NULL) { | |
1657 Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); | |
1658 old_array->set_unroll_block(NULL); | |
1659 delete old_info; | |
1660 delete old_array; | |
1661 } | |
1662 | |
1663 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); | |
1664 if (deferred != NULL) { | |
1665 // This can only happen if thread is destroyed before deoptimization occurs. | |
1666 assert(deferred->length() != 0, "empty array!"); | |
1667 do { | |
1668 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); | |
1669 deferred->remove_at(0); | |
1670 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
1671 delete dlv; | |
1672 } while (deferred->length() != 0); | |
1673 delete deferred; | |
1674 } | |
1675 | |
1676 // All Java related clean up happens in exit | |
1677 ThreadSafepointState::destroy(this); | |
1678 if (_thread_profiler != NULL) delete _thread_profiler; | |
1679 if (_thread_stat != NULL) delete _thread_stat; | |
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1680 |
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1681 #if defined(GRAAL) && (GRAAL_COUNTERS_SIZE > 0) |
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1682 if (graal_counters_include(threadObj())) { |
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1683 for (int i = 0; i < GRAAL_COUNTERS_SIZE; i++) { |
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1684 _graal_old_thread_counters[i] += _graal_counters[i]; |
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1685 } |
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|
1686 } |
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|
1687 #endif |
0 | 1688 } |
1689 | |
1690 | |
1691 // The first routine called by a new Java thread | |
1692 void JavaThread::run() { | |
1693 // initialize thread-local alloc buffer related fields | |
1694 this->initialize_tlab(); | |
1695 | |
1696 // used to test validitity of stack trace backs | |
1697 this->record_base_of_stack_pointer(); | |
1698 | |
1699 // Record real stack base and size. | |
1700 this->record_stack_base_and_size(); | |
1701 | |
1702 // Initialize thread local storage; set before calling MutexLocker | |
1703 this->initialize_thread_local_storage(); | |
1704 | |
1705 this->create_stack_guard_pages(); | |
1706 | |
1681
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1707 this->cache_global_variables(); |
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1708 |
0 | 1709 // Thread is now sufficient initialized to be handled by the safepoint code as being |
1710 // in the VM. Change thread state from _thread_new to _thread_in_vm | |
1711 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); | |
1712 | |
1713 assert(JavaThread::current() == this, "sanity check"); | |
1714 assert(!Thread::current()->owns_locks(), "sanity check"); | |
1715 | |
1716 DTRACE_THREAD_PROBE(start, this); | |
1717 | |
1718 // This operation might block. We call that after all safepoint checks for a new thread has | |
1719 // been completed. | |
1720 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1721 | |
1722 if (JvmtiExport::should_post_thread_life()) { | |
1723 JvmtiExport::post_thread_start(this); | |
1724 } | |
1725 | |
10405 | 1726 EventThreadStart event; |
1727 if (event.should_commit()) { | |
1728 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1729 event.commit(); | |
1730 } | |
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1731 |
0 | 1732 // We call another function to do the rest so we are sure that the stack addresses used |
1733 // from there will be lower than the stack base just computed | |
1734 thread_main_inner(); | |
1735 | |
1736 // Note, thread is no longer valid at this point! | |
1737 } | |
1738 | |
1739 | |
1740 void JavaThread::thread_main_inner() { | |
1741 assert(JavaThread::current() == this, "sanity check"); | |
1742 assert(this->threadObj() != NULL, "just checking"); | |
1743 | |
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1744 // Execute thread entry point unless this thread has a pending exception |
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1745 // or has been stopped before starting. |
0 | 1746 // Note: Due to JVM_StopThread we can have pending exceptions already! |
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1747 if (!this->has_pending_exception() && |
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1748 !java_lang_Thread::is_stillborn(this->threadObj())) { |
4006 | 1749 { |
1750 ResourceMark rm(this); | |
1751 this->set_native_thread_name(this->get_thread_name()); | |
1752 } | |
0 | 1753 HandleMark hm(this); |
1754 this->entry_point()(this, this); | |
1755 } | |
1756 | |
1757 DTRACE_THREAD_PROBE(stop, this); | |
1758 | |
1759 this->exit(false); | |
1760 delete this; | |
1761 } | |
1762 | |
1763 | |
1764 static void ensure_join(JavaThread* thread) { | |
1765 // We do not need to grap the Threads_lock, since we are operating on ourself. | |
1766 Handle threadObj(thread, thread->threadObj()); | |
1767 assert(threadObj.not_null(), "java thread object must exist"); | |
1768 ObjectLocker lock(threadObj, thread); | |
1769 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1770 thread->clear_pending_exception(); | |
1771 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. | |
1772 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); | |
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1773 // Clear the native thread instance - this makes isAlive return false and allows the join() |
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1774 // to complete once we've done the notify_all below |
0 | 1775 java_lang_Thread::set_thread(threadObj(), NULL); |
1776 lock.notify_all(thread); | |
1777 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1778 thread->clear_pending_exception(); | |
1779 } | |
1780 | |
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1781 |
0 | 1782 // For any new cleanup additions, please check to see if they need to be applied to |
1783 // cleanup_failed_attach_current_thread as well. | |
1784 void JavaThread::exit(bool destroy_vm, ExitType exit_type) { | |
1785 assert(this == JavaThread::current(), "thread consistency check"); | |
1786 | |
1787 HandleMark hm(this); | |
1788 Handle uncaught_exception(this, this->pending_exception()); | |
1789 this->clear_pending_exception(); | |
1790 Handle threadObj(this, this->threadObj()); | |
1791 assert(threadObj.not_null(), "Java thread object should be created"); | |
1792 | |
1793 if (get_thread_profiler() != NULL) { | |
1794 get_thread_profiler()->disengage(); | |
1795 ResourceMark rm; | |
1796 get_thread_profiler()->print(get_thread_name()); | |
1797 } | |
1798 | |
1799 | |
1800 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place | |
1801 { | |
1802 EXCEPTION_MARK; | |
1803 | |
1804 CLEAR_PENDING_EXCEPTION; | |
1805 } | |
1806 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This | |
1807 // has to be fixed by a runtime query method | |
1808 if (!destroy_vm || JDK_Version::is_jdk12x_version()) { | |
1809 // JSR-166: change call from from ThreadGroup.uncaughtException to | |
1810 // java.lang.Thread.dispatchUncaughtException | |
1811 if (uncaught_exception.not_null()) { | |
1812 Handle group(this, java_lang_Thread::threadGroup(threadObj())); | |
1813 { | |
1814 EXCEPTION_MARK; | |
1815 // Check if the method Thread.dispatchUncaughtException() exists. If so | |
1816 // call it. Otherwise we have an older library without the JSR-166 changes, | |
1817 // so call ThreadGroup.uncaughtException() | |
1818 KlassHandle recvrKlass(THREAD, threadObj->klass()); | |
1819 CallInfo callinfo; | |
1142 | 1820 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1821 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
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1822 vmSymbols::dispatchUncaughtException_name(), |
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1823 vmSymbols::throwable_void_signature(), |
0 | 1824 KlassHandle(), false, false, THREAD); |
1825 CLEAR_PENDING_EXCEPTION; | |
1826 methodHandle method = callinfo.selected_method(); | |
1827 if (method.not_null()) { | |
1828 JavaValue result(T_VOID); | |
1829 JavaCalls::call_virtual(&result, | |
1830 threadObj, thread_klass, | |
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1831 vmSymbols::dispatchUncaughtException_name(), |
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1832 vmSymbols::throwable_void_signature(), |
0 | 1833 uncaught_exception, |
1834 THREAD); | |
1835 } else { | |
1142 | 1836 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 1837 JavaValue result(T_VOID); |
1838 JavaCalls::call_virtual(&result, | |
1839 group, thread_group, | |
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1840 vmSymbols::uncaughtException_name(), |
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1841 vmSymbols::thread_throwable_void_signature(), |
0 | 1842 threadObj, // Arg 1 |
1843 uncaught_exception, // Arg 2 | |
1844 THREAD); | |
1845 } | |
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1846 if (HAS_PENDING_EXCEPTION) { |
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1847 ResourceMark rm(this); |
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1848 jio_fprintf(defaultStream::error_stream(), |
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1849 "\nException: %s thrown from the UncaughtExceptionHandler" |
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1850 " in thread \"%s\"\n", |
6983 | 1851 pending_exception()->klass()->external_name(), |
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1852 get_thread_name()); |
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1853 CLEAR_PENDING_EXCEPTION; |
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1854 } |
0 | 1855 } |
1856 } | |
1857 | |
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1858 // Called before the java thread exit since we want to read info |
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1859 // from java_lang_Thread object |
10405 | 1860 EventThreadEnd event; |
1861 if (event.should_commit()) { | |
1862 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1863 event.commit(); | |
1864 } | |
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1865 |
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1866 // Call after last event on thread |
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1867 EVENT_THREAD_EXIT(this); |
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1868 |
0 | 1869 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
1870 // the execution of the method. If that is not enough, then we don't really care. Thread.stop | |
1871 // is deprecated anyhow. | |
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1872 if (!is_Compiler_thread()) { |
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1873 int count = 3; |
0 | 1874 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { |
1875 EXCEPTION_MARK; | |
1876 JavaValue result(T_VOID); | |
1142 | 1877 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1878 JavaCalls::call_virtual(&result, |
1879 threadObj, thread_klass, | |
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1880 vmSymbols::exit_method_name(), |
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1881 vmSymbols::void_method_signature(), |
0 | 1882 THREAD); |
1883 CLEAR_PENDING_EXCEPTION; | |
1884 } | |
1885 } | |
1886 // notify JVMTI | |
1887 if (JvmtiExport::should_post_thread_life()) { | |
1888 JvmtiExport::post_thread_end(this); | |
1889 } | |
1890 | |
1891 // We have notified the agents that we are exiting, before we go on, | |
1892 // we must check for a pending external suspend request and honor it | |
1893 // in order to not surprise the thread that made the suspend request. | |
1894 while (true) { | |
1895 { | |
1896 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1897 if (!is_external_suspend()) { | |
1898 set_terminated(_thread_exiting); | |
1899 ThreadService::current_thread_exiting(this); | |
1900 break; | |
1901 } | |
1902 // Implied else: | |
1903 // Things get a little tricky here. We have a pending external | |
1904 // suspend request, but we are holding the SR_lock so we | |
1905 // can't just self-suspend. So we temporarily drop the lock | |
1906 // and then self-suspend. | |
1907 } | |
1908 | |
1909 ThreadBlockInVM tbivm(this); | |
1910 java_suspend_self(); | |
1911 | |
1912 // We're done with this suspend request, but we have to loop around | |
1913 // and check again. Eventually we will get SR_lock without a pending | |
1914 // external suspend request and will be able to mark ourselves as | |
1915 // exiting. | |
1916 } | |
1917 // no more external suspends are allowed at this point | |
1918 } else { | |
1919 // before_exit() has already posted JVMTI THREAD_END events | |
1920 } | |
1921 | |
1922 // Notify waiters on thread object. This has to be done after exit() is called | |
1923 // on the thread (if the thread is the last thread in a daemon ThreadGroup the | |
1924 // group should have the destroyed bit set before waiters are notified). | |
1925 ensure_join(this); | |
1926 assert(!this->has_pending_exception(), "ensure_join should have cleared"); | |
1927 | |
1928 // 6282335 JNI DetachCurrentThread spec states that all Java monitors | |
1929 // held by this thread must be released. A detach operation must only | |
1930 // get here if there are no Java frames on the stack. Therefore, any | |
1931 // owned monitors at this point MUST be JNI-acquired monitors which are | |
1932 // pre-inflated and in the monitor cache. | |
1933 // | |
1934 // ensure_join() ignores IllegalThreadStateExceptions, and so does this. | |
1935 if (exit_type == jni_detach && JNIDetachReleasesMonitors) { | |
1936 assert(!this->has_last_Java_frame(), "detaching with Java frames?"); | |
1937 ObjectSynchronizer::release_monitors_owned_by_thread(this); | |
1938 assert(!this->has_pending_exception(), "release_monitors should have cleared"); | |
1939 } | |
1940 | |
1941 // These things needs to be done while we are still a Java Thread. Make sure that thread | |
1942 // is in a consistent state, in case GC happens | |
1943 assert(_privileged_stack_top == NULL, "must be NULL when we get here"); | |
1944 | |
1945 if (active_handles() != NULL) { | |
1946 JNIHandleBlock* block = active_handles(); | |
1947 set_active_handles(NULL); | |
1948 JNIHandleBlock::release_block(block); | |
1949 } | |
1950 | |
1951 if (free_handle_block() != NULL) { | |
1952 JNIHandleBlock* block = free_handle_block(); | |
1953 set_free_handle_block(NULL); | |
1954 JNIHandleBlock::release_block(block); | |
1955 } | |
1956 | |
1957 // These have to be removed while this is still a valid thread. | |
1958 remove_stack_guard_pages(); | |
1959 | |
1960 if (UseTLAB) { | |
1961 tlab().make_parsable(true); // retire TLAB | |
1962 } | |
1963 | |
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1964 if (JvmtiEnv::environments_might_exist()) { |
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1965 JvmtiExport::cleanup_thread(this); |
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1966 } |
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1967 |
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1968 // We must flush any deferred card marks before removing a thread from |
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1969 // the list of active threads. |
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1970 Universe::heap()->flush_deferred_store_barrier(this); |
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1971 assert(deferred_card_mark().is_empty(), "Should have been flushed"); |
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1972 |
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1973 #if INCLUDE_ALL_GCS |
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1974 // We must flush the G1-related buffers before removing a thread |
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1975 // from the list of active threads. We must do this after any deferred |
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1976 // card marks have been flushed (above) so that any entries that are |
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1977 // added to the thread's dirty card queue as a result are not lost. |
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1978 if (UseG1GC) { |
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1979 flush_barrier_queues(); |
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1980 } |
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1981 #endif // INCLUDE_ALL_GCS |
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1982 |
0 | 1983 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
1984 Threads::remove(this); | |
1985 } | |
1986 | |
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1987 #if INCLUDE_ALL_GCS |
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1988 // Flush G1-related queues. |
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1989 void JavaThread::flush_barrier_queues() { |
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1990 satb_mark_queue().flush(); |
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1991 dirty_card_queue().flush(); |
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1992 } |
1842
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1993 |
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1994 void JavaThread::initialize_queues() { |
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1995 assert(!SafepointSynchronize::is_at_safepoint(), |
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1996 "we should not be at a safepoint"); |
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1997 |
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1998 ObjPtrQueue& satb_queue = satb_mark_queue(); |
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1999 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
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2000 // The SATB queue should have been constructed with its active |
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2001 // field set to false. |
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2002 assert(!satb_queue.is_active(), "SATB queue should not be active"); |
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2003 assert(satb_queue.is_empty(), "SATB queue should be empty"); |
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2004 // If we are creating the thread during a marking cycle, we should |
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2005 // set the active field of the SATB queue to true. |
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2006 if (satb_queue_set.is_active()) { |
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2007 satb_queue.set_active(true); |
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2008 } |
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2009 |
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2010 DirtyCardQueue& dirty_queue = dirty_card_queue(); |
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2011 // The dirty card queue should have been constructed with its |
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2012 // active field set to true. |
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2013 assert(dirty_queue.is_active(), "dirty card queue should be active"); |
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2014 } |
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2015 #endif // INCLUDE_ALL_GCS |
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2016 |
0 | 2017 void JavaThread::cleanup_failed_attach_current_thread() { |
441
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2018 if (get_thread_profiler() != NULL) { |
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2019 get_thread_profiler()->disengage(); |
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2020 ResourceMark rm; |
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2021 get_thread_profiler()->print(get_thread_name()); |
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2022 } |
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2023 |
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2024 if (active_handles() != NULL) { |
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2025 JNIHandleBlock* block = active_handles(); |
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2026 set_active_handles(NULL); |
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2027 JNIHandleBlock::release_block(block); |
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2028 } |
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2029 |
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2030 if (free_handle_block() != NULL) { |
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2031 JNIHandleBlock* block = free_handle_block(); |
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2032 set_free_handle_block(NULL); |
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2033 JNIHandleBlock::release_block(block); |
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2034 } |
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2035 |
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2036 // These have to be removed while this is still a valid thread. |
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2037 remove_stack_guard_pages(); |
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2038 |
441
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2039 if (UseTLAB) { |
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2040 tlab().make_parsable(true); // retire TLAB, if any |
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2041 } |
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2042 |
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2043 #if INCLUDE_ALL_GCS |
441
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2044 if (UseG1GC) { |
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2045 flush_barrier_queues(); |
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2046 } |
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2047 #endif // INCLUDE_ALL_GCS |
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2048 |
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2049 Threads::remove(this); |
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2050 delete this; |
0 | 2051 } |
2052 | |
2053 | |
441
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2054 |
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2055 |
0 | 2056 JavaThread* JavaThread::active() { |
2057 Thread* thread = ThreadLocalStorage::thread(); | |
2058 assert(thread != NULL, "just checking"); | |
2059 if (thread->is_Java_thread()) { | |
2060 return (JavaThread*) thread; | |
2061 } else { | |
2062 assert(thread->is_VM_thread(), "this must be a vm thread"); | |
2063 VM_Operation* op = ((VMThread*) thread)->vm_operation(); | |
2064 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); | |
2065 assert(ret->is_Java_thread(), "must be a Java thread"); | |
2066 return ret; | |
2067 } | |
2068 } | |
2069 | |
2070 bool JavaThread::is_lock_owned(address adr) const { | |
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2071 if (Thread::is_lock_owned(adr)) return true; |
0 | 2072 |
2073 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2074 if (chunk->contains(adr)) return true; | |
2075 } | |
2076 | |
2077 return false; | |
2078 } | |
2079 | |
2080 | |
2081 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { | |
2082 chunk->set_next(monitor_chunks()); | |
2083 set_monitor_chunks(chunk); | |
2084 } | |
2085 | |
2086 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { | |
2087 guarantee(monitor_chunks() != NULL, "must be non empty"); | |
2088 if (monitor_chunks() == chunk) { | |
2089 set_monitor_chunks(chunk->next()); | |
2090 } else { | |
2091 MonitorChunk* prev = monitor_chunks(); | |
2092 while (prev->next() != chunk) prev = prev->next(); | |
2093 prev->set_next(chunk->next()); | |
2094 } | |
2095 } | |
2096 | |
2097 // JVM support. | |
2098 | |
2099 // Note: this function shouldn't block if it's called in | |
2100 // _thread_in_native_trans state (such as from | |
2101 // check_special_condition_for_native_trans()). | |
2102 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { | |
2103 | |
2104 if (has_last_Java_frame() && has_async_condition()) { | |
2105 // If we are at a polling page safepoint (not a poll return) | |
2106 // then we must defer async exception because live registers | |
2107 // will be clobbered by the exception path. Poll return is | |
2108 // ok because the call we a returning from already collides | |
2109 // with exception handling registers and so there is no issue. | |
2110 // (The exception handling path kills call result registers but | |
2111 // this is ok since the exception kills the result anyway). | |
2112 | |
2113 if (is_at_poll_safepoint()) { | |
2114 // if the code we are returning to has deoptimized we must defer | |
2115 // the exception otherwise live registers get clobbered on the | |
2116 // exception path before deoptimization is able to retrieve them. | |
2117 // | |
2118 RegisterMap map(this, false); | |
2119 frame caller_fr = last_frame().sender(&map); | |
2120 assert(caller_fr.is_compiled_frame(), "what?"); | |
2121 if (caller_fr.is_deoptimized_frame()) { | |
2122 if (TraceExceptions) { | |
2123 ResourceMark rm; | |
2124 tty->print_cr("deferred async exception at compiled safepoint"); | |
2125 } | |
2126 return; | |
2127 } | |
2128 } | |
2129 } | |
2130 | |
2131 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); | |
2132 if (condition == _no_async_condition) { | |
2133 // Conditions have changed since has_special_runtime_exit_condition() | |
2134 // was called: | |
2135 // - if we were here only because of an external suspend request, | |
2136 // then that was taken care of above (or cancelled) so we are done | |
2137 // - if we were here because of another async request, then it has | |
2138 // been cleared between the has_special_runtime_exit_condition() | |
2139 // and now so again we are done | |
2140 return; | |
2141 } | |
2142 | |
2143 // Check for pending async. exception | |
2144 if (_pending_async_exception != NULL) { | |
2145 // Only overwrite an already pending exception, if it is not a threadDeath. | |
1142 | 2146 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2147 |
2148 // We cannot call Exceptions::_throw(...) here because we cannot block | |
2149 set_pending_exception(_pending_async_exception, __FILE__, __LINE__); | |
2150 | |
2151 if (TraceExceptions) { | |
2152 ResourceMark rm; | |
2153 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); | |
2154 if (has_last_Java_frame() ) { | |
2155 frame f = last_frame(); | |
2156 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); | |
2157 } | |
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2158 tty->print_cr(" of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2159 } |
2160 _pending_async_exception = NULL; | |
2161 clear_has_async_exception(); | |
2162 } | |
2163 } | |
2164 | |
2165 if (check_unsafe_error && | |
2166 condition == _async_unsafe_access_error && !has_pending_exception()) { | |
2167 condition = _no_async_condition; // done | |
2168 switch (thread_state()) { | |
2169 case _thread_in_vm: | |
2170 { | |
2171 JavaThread* THREAD = this; | |
2172 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2173 } | |
2174 case _thread_in_native: | |
2175 { | |
2176 ThreadInVMfromNative tiv(this); | |
2177 JavaThread* THREAD = this; | |
2178 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2179 } | |
2180 case _thread_in_Java: | |
2181 { | |
2182 ThreadInVMfromJava tiv(this); | |
2183 JavaThread* THREAD = this; | |
2184 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); | |
2185 } | |
2186 default: | |
2187 ShouldNotReachHere(); | |
2188 } | |
2189 } | |
2190 | |
2191 assert(condition == _no_async_condition || has_pending_exception() || | |
2192 (!check_unsafe_error && condition == _async_unsafe_access_error), | |
2193 "must have handled the async condition, if no exception"); | |
2194 } | |
2195 | |
2196 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { | |
2197 // | |
2198 // Check for pending external suspend. Internal suspend requests do | |
2199 // not use handle_special_runtime_exit_condition(). | |
2200 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2201 // thread is not the current thread. In older versions of jdbx, jdbx | |
2202 // threads could call into the VM with another thread's JNIEnv so we | |
2203 // can be here operating on behalf of a suspended thread (4432884). | |
2204 bool do_self_suspend = is_external_suspend_with_lock(); | |
2205 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { | |
2206 // | |
2207 // Because thread is external suspended the safepoint code will count | |
2208 // thread as at a safepoint. This can be odd because we can be here | |
2209 // as _thread_in_Java which would normally transition to _thread_blocked | |
2210 // at a safepoint. We would like to mark the thread as _thread_blocked | |
2211 // before calling java_suspend_self like all other callers of it but | |
2212 // we must then observe proper safepoint protocol. (We can't leave | |
2213 // _thread_blocked with a safepoint in progress). However we can be | |
2214 // here as _thread_in_native_trans so we can't use a normal transition | |
2215 // constructor/destructor pair because they assert on that type of | |
2216 // transition. We could do something like: | |
2217 // | |
2218 // JavaThreadState state = thread_state(); | |
2219 // set_thread_state(_thread_in_vm); | |
2220 // { | |
2221 // ThreadBlockInVM tbivm(this); | |
2222 // java_suspend_self() | |
2223 // } | |
2224 // set_thread_state(_thread_in_vm_trans); | |
2225 // if (safepoint) block; | |
2226 // set_thread_state(state); | |
2227 // | |
2228 // but that is pretty messy. Instead we just go with the way the | |
2229 // code has worked before and note that this is the only path to | |
2230 // java_suspend_self that doesn't put the thread in _thread_blocked | |
2231 // mode. | |
2232 | |
2233 frame_anchor()->make_walkable(this); | |
2234 java_suspend_self(); | |
2235 | |
2236 // We might be here for reasons in addition to the self-suspend request | |
2237 // so check for other async requests. | |
2238 } | |
2239 | |
2240 if (check_asyncs) { | |
2241 check_and_handle_async_exceptions(); | |
2242 } | |
2243 } | |
2244 | |
2245 void JavaThread::send_thread_stop(oop java_throwable) { | |
2246 assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); | |
2247 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); | |
2248 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
2249 | |
2250 // Do not throw asynchronous exceptions against the compiler thread | |
2251 // (the compiler thread should not be a Java thread -- fix in 1.4.2) | |
2252 if (is_Compiler_thread()) return; | |
2253 | |
2254 { | |
2255 // Actually throw the Throwable against the target Thread - however | |
2256 // only if there is no thread death exception installed already. | |
1142 | 2257 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2258 // If the topmost frame is a runtime stub, then we are calling into |
2259 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) | |
2260 // must deoptimize the caller before continuing, as the compiled exception handler table | |
2261 // may not be valid | |
2262 if (has_last_Java_frame()) { | |
2263 frame f = last_frame(); | |
2264 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { | |
2265 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2266 RegisterMap reg_map(this, UseBiasedLocking); | |
2267 frame compiled_frame = f.sender(®_map); | |
7428
2d6c433b1f38
8004741: Missing compiled exception handle table entry for multidimensional array allocation
kvn
parents:
7206
diff
changeset
|
2268 if (!StressCompiledExceptionHandlers && compiled_frame.can_be_deoptimized()) { |
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13114
diff
changeset
|
2269 Deoptimization::deoptimize(this, compiled_frame, ®_map); |
0 | 2270 } |
2271 } | |
2272 } | |
2273 | |
2274 // Set async. pending exception in thread. | |
2275 set_pending_async_exception(java_throwable); | |
2276 | |
2277 if (TraceExceptions) { | |
2278 ResourceMark rm; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2279 tty->print_cr("Pending Async. exception installed of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2280 } |
2281 // for AbortVMOnException flag | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2282 NOT_PRODUCT(Exceptions::debug_check_abort(InstanceKlass::cast(_pending_async_exception->klass())->external_name())); |
0 | 2283 } |
2284 } | |
2285 | |
2286 | |
2287 // Interrupt thread so it will wake up from a potential wait() | |
2288 Thread::interrupt(this); | |
2289 } | |
2290 | |
2291 // External suspension mechanism. | |
2292 // | |
2293 // Tell the VM to suspend a thread when ever it knows that it does not hold on | |
2294 // to any VM_locks and it is at a transition | |
2295 // Self-suspension will happen on the transition out of the vm. | |
2296 // Catch "this" coming in from JNIEnv pointers when the thread has been freed | |
2297 // | |
2298 // Guarantees on return: | |
2299 // + Target thread will not execute any new bytecode (that's why we need to | |
2300 // force a safepoint) | |
2301 // + Target thread will not enter any new monitors | |
2302 // | |
2303 void JavaThread::java_suspend() { | |
2304 { MutexLocker mu(Threads_lock); | |
2305 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { | |
2306 return; | |
2307 } | |
2308 } | |
2309 | |
2310 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2311 if (!is_external_suspend()) { | |
2312 // a racing resume has cancelled us; bail out now | |
2313 return; | |
2314 } | |
2315 | |
2316 // suspend is done | |
2317 uint32_t debug_bits = 0; | |
2318 // Warning: is_ext_suspend_completed() may temporarily drop the | |
2319 // SR_lock to allow the thread to reach a stable thread state if | |
2320 // it is currently in a transient thread state. | |
2321 if (is_ext_suspend_completed(false /* !called_by_wait */, | |
2322 SuspendRetryDelay, &debug_bits) ) { | |
2323 return; | |
2324 } | |
2325 } | |
2326 | |
2327 VM_ForceSafepoint vm_suspend; | |
2328 VMThread::execute(&vm_suspend); | |
2329 } | |
2330 | |
2331 // Part II of external suspension. | |
2332 // A JavaThread self suspends when it detects a pending external suspend | |
2333 // request. This is usually on transitions. It is also done in places | |
2334 // where continuing to the next transition would surprise the caller, | |
2335 // e.g., monitor entry. | |
2336 // | |
2337 // Returns the number of times that the thread self-suspended. | |
2338 // | |
2339 // Note: DO NOT call java_suspend_self() when you just want to block current | |
2340 // thread. java_suspend_self() is the second stage of cooperative | |
2341 // suspension for external suspend requests and should only be used | |
2342 // to complete an external suspend request. | |
2343 // | |
2344 int JavaThread::java_suspend_self() { | |
2345 int ret = 0; | |
2346 | |
2347 // we are in the process of exiting so don't suspend | |
2348 if (is_exiting()) { | |
2349 clear_external_suspend(); | |
2350 return ret; | |
2351 } | |
2352 | |
2353 assert(_anchor.walkable() || | |
2354 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), | |
2355 "must have walkable stack"); | |
2356 | |
2357 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2358 | |
979 | 2359 assert(!this->is_ext_suspended(), |
0 | 2360 "a thread trying to self-suspend should not already be suspended"); |
2361 | |
2362 if (this->is_suspend_equivalent()) { | |
2363 // If we are self-suspending as a result of the lifting of a | |
2364 // suspend equivalent condition, then the suspend_equivalent | |
2365 // flag is not cleared until we set the ext_suspended flag so | |
2366 // that wait_for_ext_suspend_completion() returns consistent | |
2367 // results. | |
2368 this->clear_suspend_equivalent(); | |
2369 } | |
2370 | |
2371 // A racing resume may have cancelled us before we grabbed SR_lock | |
2372 // above. Or another external suspend request could be waiting for us | |
2373 // by the time we return from SR_lock()->wait(). The thread | |
2374 // that requested the suspension may already be trying to walk our | |
2375 // stack and if we return now, we can change the stack out from under | |
2376 // it. This would be a "bad thing (TM)" and cause the stack walker | |
2377 // to crash. We stay self-suspended until there are no more pending | |
2378 // external suspend requests. | |
2379 while (is_external_suspend()) { | |
2380 ret++; | |
2381 this->set_ext_suspended(); | |
2382 | |
2383 // _ext_suspended flag is cleared by java_resume() | |
2384 while (is_ext_suspended()) { | |
2385 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); | |
2386 } | |
2387 } | |
2388 | |
2389 return ret; | |
2390 } | |
2391 | |
2392 #ifdef ASSERT | |
2393 // verify the JavaThread has not yet been published in the Threads::list, and | |
2394 // hence doesn't need protection from concurrent access at this stage | |
2395 void JavaThread::verify_not_published() { | |
2396 if (!Threads_lock->owned_by_self()) { | |
2397 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); | |
2398 assert( !Threads::includes(this), | |
2399 "java thread shouldn't have been published yet!"); | |
2400 } | |
2401 else { | |
2402 assert( !Threads::includes(this), | |
2403 "java thread shouldn't have been published yet!"); | |
2404 } | |
2405 } | |
2406 #endif | |
2407 | |
2408 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2409 // progress or when _suspend_flags is non-zero. | |
2410 // Current thread needs to self-suspend if there is a suspend request and/or | |
2411 // block if a safepoint is in progress. | |
2412 // Async exception ISN'T checked. | |
2413 // Note only the ThreadInVMfromNative transition can call this function | |
2414 // directly and when thread state is _thread_in_native_trans | |
2415 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { | |
2416 assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); | |
2417 | |
2418 JavaThread *curJT = JavaThread::current(); | |
2419 bool do_self_suspend = thread->is_external_suspend(); | |
2420 | |
2421 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); | |
2422 | |
2423 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2424 // thread is not the current thread. In older versions of jdbx, jdbx | |
2425 // threads could call into the VM with another thread's JNIEnv so we | |
2426 // can be here operating on behalf of a suspended thread (4432884). | |
2427 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { | |
2428 JavaThreadState state = thread->thread_state(); | |
2429 | |
2430 // We mark this thread_blocked state as a suspend-equivalent so | |
2431 // that a caller to is_ext_suspend_completed() won't be confused. | |
2432 // The suspend-equivalent state is cleared by java_suspend_self(). | |
2433 thread->set_suspend_equivalent(); | |
2434 | |
2435 // If the safepoint code sees the _thread_in_native_trans state, it will | |
2436 // wait until the thread changes to other thread state. There is no | |
2437 // guarantee on how soon we can obtain the SR_lock and complete the | |
2438 // self-suspend request. It would be a bad idea to let safepoint wait for | |
2439 // too long. Temporarily change the state to _thread_blocked to | |
2440 // let the VM thread know that this thread is ready for GC. The problem | |
2441 // of changing thread state is that safepoint could happen just after | |
2442 // java_suspend_self() returns after being resumed, and VM thread will | |
2443 // see the _thread_blocked state. We must check for safepoint | |
2444 // after restoring the state and make sure we won't leave while a safepoint | |
2445 // is in progress. | |
2446 thread->set_thread_state(_thread_blocked); | |
2447 thread->java_suspend_self(); | |
2448 thread->set_thread_state(state); | |
2449 // Make sure new state is seen by VM thread | |
2450 if (os::is_MP()) { | |
2451 if (UseMembar) { | |
2452 // Force a fence between the write above and read below | |
2453 OrderAccess::fence(); | |
2454 } else { | |
2455 // Must use this rather than serialization page in particular on Windows | |
2456 InterfaceSupport::serialize_memory(thread); | |
2457 } | |
2458 } | |
2459 } | |
2460 | |
2461 if (SafepointSynchronize::do_call_back()) { | |
2462 // If we are safepointing, then block the caller which may not be | |
2463 // the same as the target thread (see above). | |
2464 SafepointSynchronize::block(curJT); | |
2465 } | |
2466 | |
2467 if (thread->is_deopt_suspend()) { | |
2468 thread->clear_deopt_suspend(); | |
2469 RegisterMap map(thread, false); | |
2470 frame f = thread->last_frame(); | |
2471 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { | |
2472 f = f.sender(&map); | |
2473 } | |
2474 if (f.id() == thread->must_deopt_id()) { | |
2475 thread->clear_must_deopt_id(); | |
1727
da877bdc9000
6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents:
1689
diff
changeset
|
2476 f.deoptimize(thread); |
0 | 2477 } else { |
2478 fatal("missed deoptimization!"); | |
2479 } | |
2480 } | |
2481 } | |
2482 | |
2483 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2484 // progress or when _suspend_flags is non-zero. | |
2485 // Current thread needs to self-suspend if there is a suspend request and/or | |
2486 // block if a safepoint is in progress. | |
2487 // Also check for pending async exception (not including unsafe access error). | |
2488 // Note only the native==>VM/Java barriers can call this function and when | |
2489 // thread state is _thread_in_native_trans. | |
2490 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { | |
2491 check_safepoint_and_suspend_for_native_trans(thread); | |
2492 | |
2493 if (thread->has_async_exception()) { | |
2494 // We are in _thread_in_native_trans state, don't handle unsafe | |
2495 // access error since that may block. | |
2496 thread->check_and_handle_async_exceptions(false); | |
2497 } | |
2498 } | |
2499 | |
4873
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2500 // This is a variant of the normal |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2501 // check_special_condition_for_native_trans with slightly different |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2502 // semantics for use by critical native wrappers. It does all the |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2503 // normal checks but also performs the transition back into |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2504 // thread_in_Java state. This is required so that critical natives |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2505 // can potentially block and perform a GC if they are the last thread |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2506 // exiting the GC_locker. |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2507 void JavaThread::check_special_condition_for_native_trans_and_transition(JavaThread *thread) { |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2508 check_special_condition_for_native_trans(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2509 |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2510 // Finish the transition |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2511 thread->set_thread_state(_thread_in_Java); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2512 |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2513 if (thread->do_critical_native_unlock()) { |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2514 ThreadInVMfromJavaNoAsyncException tiv(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2515 GC_locker::unlock_critical(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2516 thread->clear_critical_native_unlock(); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2517 } |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2518 } |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2519 |
0 | 2520 // We need to guarantee the Threads_lock here, since resumes are not |
2521 // allowed during safepoint synchronization | |
2522 // Can only resume from an external suspension | |
2523 void JavaThread::java_resume() { | |
2524 assert_locked_or_safepoint(Threads_lock); | |
2525 | |
2526 // Sanity check: thread is gone, has started exiting or the thread | |
2527 // was not externally suspended. | |
2528 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { | |
2529 return; | |
2530 } | |
2531 | |
2532 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2533 | |
2534 clear_external_suspend(); | |
2535 | |
2536 if (is_ext_suspended()) { | |
2537 clear_ext_suspended(); | |
2538 SR_lock()->notify_all(); | |
2539 } | |
2540 } | |
2541 | |
2542 void JavaThread::create_stack_guard_pages() { | |
2543 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; | |
2544 address low_addr = stack_base() - stack_size(); | |
2545 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2546 | |
2547 int allocate = os::allocate_stack_guard_pages(); | |
2548 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); | |
2549 | |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2550 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
0 | 2551 warning("Attempt to allocate stack guard pages failed."); |
2552 return; | |
2553 } | |
2554 | |
2555 if (os::guard_memory((char *) low_addr, len)) { | |
2556 _stack_guard_state = stack_guard_enabled; | |
2557 } else { | |
2558 warning("Attempt to protect stack guard pages failed."); | |
2559 if (os::uncommit_memory((char *) low_addr, len)) { | |
2560 warning("Attempt to deallocate stack guard pages failed."); | |
2561 } | |
2562 } | |
2563 } | |
2564 | |
2565 void JavaThread::remove_stack_guard_pages() { | |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
2566 assert(Thread::current() == this, "from different thread"); |
0 | 2567 if (_stack_guard_state == stack_guard_unused) return; |
2568 address low_addr = stack_base() - stack_size(); | |
2569 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2570 | |
2571 if (os::allocate_stack_guard_pages()) { | |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2572 if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
0 | 2573 _stack_guard_state = stack_guard_unused; |
2574 } else { | |
2575 warning("Attempt to deallocate stack guard pages failed."); | |
2576 } | |
2577 } else { | |
2578 if (_stack_guard_state == stack_guard_unused) return; | |
2579 if (os::unguard_memory((char *) low_addr, len)) { | |
2580 _stack_guard_state = stack_guard_unused; | |
2581 } else { | |
2582 warning("Attempt to unprotect stack guard pages failed."); | |
2583 } | |
2584 } | |
2585 } | |
2586 | |
2587 void JavaThread::enable_stack_yellow_zone() { | |
2588 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2589 assert(_stack_guard_state != stack_guard_enabled, "already enabled"); | |
2590 | |
2591 // The base notation is from the stacks point of view, growing downward. | |
2592 // We need to adjust it to work correctly with guard_memory() | |
2593 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2594 | |
2595 guarantee(base < stack_base(),"Error calculating stack yellow zone"); | |
2596 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); | |
2597 | |
2598 if (os::guard_memory((char *) base, stack_yellow_zone_size())) { | |
2599 _stack_guard_state = stack_guard_enabled; | |
2600 } else { | |
2601 warning("Attempt to guard stack yellow zone failed."); | |
2602 } | |
2603 enable_register_stack_guard(); | |
2604 } | |
2605 | |
2606 void JavaThread::disable_stack_yellow_zone() { | |
2607 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2608 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); | |
2609 | |
2610 // Simply return if called for a thread that does not use guard pages. | |
2611 if (_stack_guard_state == stack_guard_unused) return; | |
2612 | |
2613 // The base notation is from the stacks point of view, growing downward. | |
2614 // We need to adjust it to work correctly with guard_memory() | |
2615 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2616 | |
2617 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { | |
2618 _stack_guard_state = stack_guard_yellow_disabled; | |
2619 } else { | |
2620 warning("Attempt to unguard stack yellow zone failed."); | |
2621 } | |
2622 disable_register_stack_guard(); | |
2623 } | |
2624 | |
2625 void JavaThread::enable_stack_red_zone() { | |
2626 // The base notation is from the stacks point of view, growing downward. | |
2627 // We need to adjust it to work correctly with guard_memory() | |
2628 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2629 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2630 | |
2631 guarantee(base < stack_base(),"Error calculating stack red zone"); | |
2632 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); | |
2633 | |
2634 if(!os::guard_memory((char *) base, stack_red_zone_size())) { | |
2635 warning("Attempt to guard stack red zone failed."); | |
2636 } | |
2637 } | |
2638 | |
2639 void JavaThread::disable_stack_red_zone() { | |
2640 // The base notation is from the stacks point of view, growing downward. | |
2641 // We need to adjust it to work correctly with guard_memory() | |
2642 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2643 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2644 if (!os::unguard_memory((char *)base, stack_red_zone_size())) { | |
2645 warning("Attempt to unguard stack red zone failed."); | |
2646 } | |
2647 } | |
2648 | |
2649 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { | |
2650 // ignore is there is no stack | |
2651 if (!has_last_Java_frame()) return; | |
2652 // traverse the stack frames. Starts from top frame. | |
2653 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2654 frame* fr = fst.current(); | |
2655 f(fr, fst.register_map()); | |
2656 } | |
2657 } | |
2658 | |
2659 | |
2660 #ifndef PRODUCT | |
2661 // Deoptimization | |
2662 // Function for testing deoptimization | |
2663 void JavaThread::deoptimize() { | |
2664 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2665 StackFrameStream fst(this, UseBiasedLocking); | |
2666 bool deopt = false; // Dump stack only if a deopt actually happens. | |
2667 bool only_at = strlen(DeoptimizeOnlyAt) > 0; | |
2668 // Iterate over all frames in the thread and deoptimize | |
2669 for(; !fst.is_done(); fst.next()) { | |
2670 if(fst.current()->can_be_deoptimized()) { | |
2671 | |
2672 if (only_at) { | |
2673 // Deoptimize only at particular bcis. DeoptimizeOnlyAt | |
2674 // consists of comma or carriage return separated numbers so | |
2675 // search for the current bci in that string. | |
2676 address pc = fst.current()->pc(); | |
2677 nmethod* nm = (nmethod*) fst.current()->cb(); | |
2678 ScopeDesc* sd = nm->scope_desc_at( pc); | |
2679 char buffer[8]; | |
2680 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); | |
2681 size_t len = strlen(buffer); | |
2682 const char * found = strstr(DeoptimizeOnlyAt, buffer); | |
2683 while (found != NULL) { | |
2684 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && | |
2685 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { | |
2686 // Check that the bci found is bracketed by terminators. | |
2687 break; | |
2688 } | |
2689 found = strstr(found + 1, buffer); | |
2690 } | |
2691 if (!found) { | |
2692 continue; | |
2693 } | |
2694 } | |
2695 | |
2696 if (DebugDeoptimization && !deopt) { | |
2697 deopt = true; // One-time only print before deopt | |
2698 tty->print_cr("[BEFORE Deoptimization]"); | |
2699 trace_frames(); | |
2700 trace_stack(); | |
2701 } | |
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13114
diff
changeset
|
2702 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
0 | 2703 } |
2704 } | |
2705 | |
2706 if (DebugDeoptimization && deopt) { | |
2707 tty->print_cr("[AFTER Deoptimization]"); | |
2708 trace_frames(); | |
2709 } | |
2710 } | |
2711 | |
2712 | |
2713 // Make zombies | |
2714 void JavaThread::make_zombies() { | |
2715 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2716 if (fst.current()->can_be_deoptimized()) { | |
2717 // it is a Java nmethod | |
2718 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); | |
2719 nm->make_not_entrant(); | |
2720 } | |
2721 } | |
2722 } | |
2723 #endif // PRODUCT | |
2724 | |
2725 | |
2726 void JavaThread::deoptimized_wrt_marked_nmethods() { | |
2727 if (!has_last_Java_frame()) return; | |
2728 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2729 StackFrameStream fst(this, UseBiasedLocking); | |
2730 for(; !fst.is_done(); fst.next()) { | |
2731 if (fst.current()->should_be_deoptimized()) { | |
6843 | 2732 if (LogCompilation && xtty != NULL) { |
2733 nmethod* nm = fst.current()->cb()->as_nmethod_or_null(); | |
2734 xtty->elem("deoptimized thread='" UINTX_FORMAT "' compile_id='%d'", | |
2735 this->name(), nm != NULL ? nm->compile_id() : -1); | |
2736 } | |
2737 | |
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13114
diff
changeset
|
2738 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
0 | 2739 } |
2740 } | |
2741 } | |
2742 | |
2743 | |
2744 // GC support | |
2745 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } | |
2746 | |
2747 void JavaThread::gc_epilogue() { | |
2748 frames_do(frame_gc_epilogue); | |
2749 } | |
2750 | |
2751 | |
2752 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } | |
2753 | |
2754 void JavaThread::gc_prologue() { | |
2755 frames_do(frame_gc_prologue); | |
2756 } | |
2757 | |
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
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|
2758 // If the caller is a NamedThread, then remember, in the current scope, |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2759 // the given JavaThread in its _processed_thread field. |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2760 class RememberProcessedThread: public StackObj { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2761 NamedThread* _cur_thr; |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2762 public: |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2763 RememberProcessedThread(JavaThread* jthr) { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2764 Thread* thread = Thread::current(); |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2765 if (thread->is_Named_thread()) { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2766 _cur_thr = (NamedThread *)thread; |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2767 _cur_thr->set_processed_thread(jthr); |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2768 } else { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2769 _cur_thr = NULL; |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2770 } |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
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1115
diff
changeset
|
2771 } |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2772 |
547f81740344
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minqi
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diff
changeset
|
2773 ~RememberProcessedThread() { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2774 if (_cur_thr) { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2775 _cur_thr->set_processed_thread(NULL); |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2776 } |
547f81740344
6361589: Print out stack trace for target thread of GC crash
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parents:
1115
diff
changeset
|
2777 } |
547f81740344
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parents:
1115
diff
changeset
|
2778 }; |
0 | 2779 |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
2780 void JavaThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
1166 | 2781 // Verify that the deferred card marks have been flushed. |
2782 assert(deferred_card_mark().is_empty(), "Should be empty during GC"); | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
997
diff
changeset
|
2783 |
0 | 2784 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
2785 // since there may be more than one thread using each ThreadProfiler. | |
2786 | |
2787 // Traverse the GCHandles | |
7179
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stefank
parents:
7177
diff
changeset
|
2788 Thread::oops_do(f, cld_f, cf); |
0 | 2789 |
2790 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2791 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2792 | |
2793 if (has_last_Java_frame()) { | |
1119
547f81740344
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parents:
1115
diff
changeset
|
2794 // Record JavaThread to GC thread |
547f81740344
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minqi
parents:
1115
diff
changeset
|
2795 RememberProcessedThread rpt(this); |
0 | 2796 |
2797 // Traverse the privileged stack | |
2798 if (_privileged_stack_top != NULL) { | |
2799 _privileged_stack_top->oops_do(f); | |
2800 } | |
2801 | |
2802 // traverse the registered growable array | |
2803 if (_array_for_gc != NULL) { | |
2804 for (int index = 0; index < _array_for_gc->length(); index++) { | |
2805 f->do_oop(_array_for_gc->adr_at(index)); | |
2806 } | |
2807 } | |
2808 | |
2809 // Traverse the monitor chunks | |
2810 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2811 chunk->oops_do(f); | |
2812 } | |
2813 | |
2814 // Traverse the execution stack | |
2815 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
7179
d0aa87f04bd5
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stefank
parents:
7177
diff
changeset
|
2816 fst.current()->oops_do(f, cld_f, cf, fst.register_map()); |
0 | 2817 } |
2818 } | |
2819 | |
2820 // callee_target is never live across a gc point so NULL it here should | |
2821 // it still contain a methdOop. | |
2822 | |
2823 set_callee_target(NULL); | |
2824 | |
2825 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); | |
2826 // If we have deferred set_locals there might be oops waiting to be | |
2827 // written | |
2828 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); | |
2829 if (list != NULL) { | |
2830 for (int i = 0; i < list->length(); i++) { | |
2831 list->at(i)->oops_do(f); | |
2832 } | |
2833 } | |
2834 | |
2835 // Traverse instance variables at the end since the GC may be moving things | |
2836 // around using this function | |
2837 f->do_oop((oop*) &_threadObj); | |
2838 f->do_oop((oop*) &_vm_result); | |
2839 f->do_oop((oop*) &_exception_oop); | |
2840 f->do_oop((oop*) &_pending_async_exception); | |
2841 | |
2842 if (jvmti_thread_state() != NULL) { | |
2843 jvmti_thread_state()->oops_do(f); | |
2844 } | |
3696
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2845 |
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2846 if (_scanned_nmethod != NULL && cf != NULL) { |
7212
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2847 // Safepoints can occur when the sweeper is scanning an nmethod so |
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2848 // process it here to make sure it isn't unloaded in the middle of |
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2849 // a scan. |
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2850 cf->do_code_blob(_scanned_nmethod); |
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2851 } |
0 | 2852 } |
2853 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2854 void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2855 Thread::nmethods_do(cf); // (super method is a no-op) |
0 | 2856 |
2857 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2858 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2859 | |
2860 if (has_last_Java_frame()) { | |
2861 // Traverse the execution stack | |
2862 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2863 fst.current()->nmethods_do(cf); |
0 | 2864 } |
2865 } | |
2866 } | |
2867 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2868 void JavaThread::metadata_do(void f(Metadata*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2869 Thread::metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2870 if (has_last_Java_frame()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2871 // Traverse the execution stack to call f() on the methods in the stack |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2872 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2873 fst.current()->metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2874 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2875 } else if (is_Compiler_thread()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2876 // need to walk ciMetadata in current compile tasks to keep alive. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2877 CompilerThread* ct = (CompilerThread*)this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2878 if (ct->env() != NULL) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2879 ct->env()->metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2880 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2881 } |
da91efe96a93
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coleenp
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6198
diff
changeset
|
2882 } |
da91efe96a93
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6198
diff
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|
2883 |
0 | 2884 // Printing |
2885 const char* _get_thread_state_name(JavaThreadState _thread_state) { | |
2886 switch (_thread_state) { | |
2887 case _thread_uninitialized: return "_thread_uninitialized"; | |
2888 case _thread_new: return "_thread_new"; | |
2889 case _thread_new_trans: return "_thread_new_trans"; | |
2890 case _thread_in_native: return "_thread_in_native"; | |
2891 case _thread_in_native_trans: return "_thread_in_native_trans"; | |
2892 case _thread_in_vm: return "_thread_in_vm"; | |
2893 case _thread_in_vm_trans: return "_thread_in_vm_trans"; | |
2894 case _thread_in_Java: return "_thread_in_Java"; | |
2895 case _thread_in_Java_trans: return "_thread_in_Java_trans"; | |
2896 case _thread_blocked: return "_thread_blocked"; | |
2897 case _thread_blocked_trans: return "_thread_blocked_trans"; | |
2898 default: return "unknown thread state"; | |
2899 } | |
2900 } | |
2901 | |
2902 #ifndef PRODUCT | |
2903 void JavaThread::print_thread_state_on(outputStream *st) const { | |
2904 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); | |
2905 }; | |
2906 void JavaThread::print_thread_state() const { | |
2907 print_thread_state_on(tty); | |
2908 }; | |
2909 #endif // PRODUCT | |
2910 | |
2911 // Called by Threads::print() for VM_PrintThreads operation | |
2912 void JavaThread::print_on(outputStream *st) const { | |
2913 st->print("\"%s\" ", get_thread_name()); | |
2914 oop thread_oop = threadObj(); | |
6766 | 2915 if (thread_oop != NULL) { |
2916 st->print("#" INT64_FORMAT " ", java_lang_Thread::thread_id(thread_oop)); | |
2917 if (java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); | |
2918 st->print("prio=%d ", java_lang_Thread::priority(thread_oop)); | |
2919 } | |
0 | 2920 Thread::print_on(st); |
2921 // print guess for valid stack memory region (assume 4K pages); helps lock debugging | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
2922 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
0 | 2923 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
2924 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); | |
2925 } | |
2926 #ifndef PRODUCT | |
2927 print_thread_state_on(st); | |
2928 _safepoint_state->print_on(st); | |
2929 #endif // PRODUCT | |
2930 } | |
2931 | |
2932 // Called by fatal error handler. The difference between this and | |
2933 // JavaThread::print() is that we can't grab lock or allocate memory. | |
2934 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { | |
2935 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); | |
2936 oop thread_obj = threadObj(); | |
2937 if (thread_obj != NULL) { | |
2938 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); | |
2939 } | |
2940 st->print(" ["); | |
2941 st->print("%s", _get_thread_state_name(_thread_state)); | |
2942 if (osthread()) { | |
2943 st->print(", id=%d", osthread()->thread_id()); | |
2944 } | |
2945 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", | |
2946 _stack_base - _stack_size, _stack_base); | |
2947 st->print("]"); | |
2948 return; | |
2949 } | |
2950 | |
2951 // Verification | |
2952 | |
2953 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } | |
2954 | |
2955 void JavaThread::verify() { | |
2956 // Verify oops in the thread. | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
2957 oops_do(&VerifyOopClosure::verify_oop, NULL, NULL); |
0 | 2958 |
2959 // Verify the stack frames. | |
2960 frames_do(frame_verify); | |
2961 } | |
2962 | |
2963 // CR 6300358 (sub-CR 2137150) | |
2964 // Most callers of this method assume that it can't return NULL but a | |
2965 // thread may not have a name whilst it is in the process of attaching to | |
2966 // the VM - see CR 6412693, and there are places where a JavaThread can be | |
2967 // seen prior to having it's threadObj set (eg JNI attaching threads and | |
2968 // if vm exit occurs during initialization). These cases can all be accounted | |
2969 // for such that this method never returns NULL. | |
2970 const char* JavaThread::get_thread_name() const { | |
2971 #ifdef ASSERT | |
2972 // early safepoints can hit while current thread does not yet have TLS | |
2973 if (!SafepointSynchronize::is_at_safepoint()) { | |
2974 Thread *cur = Thread::current(); | |
2975 if (!(cur->is_Java_thread() && cur == this)) { | |
2976 // Current JavaThreads are allowed to get their own name without | |
2977 // the Threads_lock. | |
2978 assert_locked_or_safepoint(Threads_lock); | |
2979 } | |
2980 } | |
2981 #endif // ASSERT | |
2982 return get_thread_name_string(); | |
2983 } | |
2984 | |
2985 // Returns a non-NULL representation of this thread's name, or a suitable | |
2986 // descriptive string if there is no set name | |
2987 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { | |
2988 const char* name_str; | |
2989 oop thread_obj = threadObj(); | |
2990 if (thread_obj != NULL) { | |
2991 typeArrayOop name = java_lang_Thread::name(thread_obj); | |
2992 if (name != NULL) { | |
2993 if (buf == NULL) { | |
2994 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2995 } | |
2996 else { | |
2997 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); | |
2998 } | |
2999 } | |
4006 | 3000 else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
0 | 3001 name_str = "<no-name - thread is attaching>"; |
3002 } | |
3003 else { | |
3004 name_str = Thread::name(); | |
3005 } | |
3006 } | |
3007 else { | |
3008 name_str = Thread::name(); | |
3009 } | |
3010 assert(name_str != NULL, "unexpected NULL thread name"); | |
3011 return name_str; | |
3012 } | |
3013 | |
3014 | |
3015 const char* JavaThread::get_threadgroup_name() const { | |
3016 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
3017 oop thread_obj = threadObj(); | |
3018 if (thread_obj != NULL) { | |
3019 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
3020 if (thread_group != NULL) { | |
3021 typeArrayOop name = java_lang_ThreadGroup::name(thread_group); | |
3022 // ThreadGroup.name can be null | |
3023 if (name != NULL) { | |
3024 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
3025 return str; | |
3026 } | |
3027 } | |
3028 } | |
3029 return NULL; | |
3030 } | |
3031 | |
3032 const char* JavaThread::get_parent_name() const { | |
3033 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
3034 oop thread_obj = threadObj(); | |
3035 if (thread_obj != NULL) { | |
3036 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
3037 if (thread_group != NULL) { | |
3038 oop parent = java_lang_ThreadGroup::parent(thread_group); | |
3039 if (parent != NULL) { | |
3040 typeArrayOop name = java_lang_ThreadGroup::name(parent); | |
3041 // ThreadGroup.name can be null | |
3042 if (name != NULL) { | |
3043 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
3044 return str; | |
3045 } | |
3046 } | |
3047 } | |
3048 } | |
3049 return NULL; | |
3050 } | |
3051 | |
3052 ThreadPriority JavaThread::java_priority() const { | |
3053 oop thr_oop = threadObj(); | |
3054 if (thr_oop == NULL) return NormPriority; // Bootstrapping | |
3055 ThreadPriority priority = java_lang_Thread::priority(thr_oop); | |
3056 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
3057 return priority; | |
3058 } | |
3059 | |
3060 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { | |
3061 | |
3062 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
3063 // Link Java Thread object <-> C++ Thread | |
3064 | |
3065 // Get the C++ thread object (an oop) from the JNI handle (a jthread) | |
3066 // and put it into a new Handle. The Handle "thread_oop" can then | |
3067 // be used to pass the C++ thread object to other methods. | |
3068 | |
3069 // Set the Java level thread object (jthread) field of the | |
3070 // new thread (a JavaThread *) to C++ thread object using the | |
3071 // "thread_oop" handle. | |
3072 | |
3073 // Set the thread field (a JavaThread *) of the | |
3074 // oop representing the java_lang_Thread to the new thread (a JavaThread *). | |
3075 | |
3076 Handle thread_oop(Thread::current(), | |
3077 JNIHandles::resolve_non_null(jni_thread)); | |
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|
3078 assert(InstanceKlass::cast(thread_oop->klass())->is_linked(), |
0 | 3079 "must be initialized"); |
3080 set_threadObj(thread_oop()); | |
3081 java_lang_Thread::set_thread(thread_oop(), this); | |
3082 | |
3083 if (prio == NoPriority) { | |
3084 prio = java_lang_Thread::priority(thread_oop()); | |
3085 assert(prio != NoPriority, "A valid priority should be present"); | |
3086 } | |
3087 | |
3088 // Push the Java priority down to the native thread; needs Threads_lock | |
3089 Thread::set_priority(this, prio); | |
3090 | |
3091 // Add the new thread to the Threads list and set it in motion. | |
3092 // We must have threads lock in order to call Threads::add. | |
3093 // It is crucial that we do not block before the thread is | |
3094 // added to the Threads list for if a GC happens, then the java_thread oop | |
3095 // will not be visited by GC. | |
3096 Threads::add(this); | |
3097 } | |
3098 | |
3099 oop JavaThread::current_park_blocker() { | |
3100 // Support for JSR-166 locks | |
3101 oop thread_oop = threadObj(); | |
242 | 3102 if (thread_oop != NULL && |
3103 JDK_Version::current().supports_thread_park_blocker()) { | |
0 | 3104 return java_lang_Thread::park_blocker(thread_oop); |
3105 } | |
3106 return NULL; | |
3107 } | |
3108 | |
3109 | |
3110 void JavaThread::print_stack_on(outputStream* st) { | |
3111 if (!has_last_Java_frame()) return; | |
3112 ResourceMark rm; | |
3113 HandleMark hm; | |
3114 | |
3115 RegisterMap reg_map(this); | |
3116 vframe* start_vf = last_java_vframe(®_map); | |
3117 int count = 0; | |
3118 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3119 if (f->is_java_frame()) { | |
3120 javaVFrame* jvf = javaVFrame::cast(f); | |
3121 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); | |
3122 | |
3123 // Print out lock information | |
3124 if (JavaMonitorsInStackTrace) { | |
3125 jvf->print_lock_info_on(st, count); | |
3126 } | |
3127 } else { | |
3128 // Ignore non-Java frames | |
3129 } | |
3130 | |
3131 // Bail-out case for too deep stacks | |
3132 count++; | |
3133 if (MaxJavaStackTraceDepth == count) return; | |
3134 } | |
3135 } | |
3136 | |
3137 | |
3138 // JVMTI PopFrame support | |
3139 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { | |
3140 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); | |
3141 if (in_bytes(size_in_bytes) != 0) { | |
6197 | 3142 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes), mtThread); |
0 | 3143 _popframe_preserved_args_size = in_bytes(size_in_bytes); |
1603
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|
3144 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
0 | 3145 } |
3146 } | |
3147 | |
3148 void* JavaThread::popframe_preserved_args() { | |
3149 return _popframe_preserved_args; | |
3150 } | |
3151 | |
3152 ByteSize JavaThread::popframe_preserved_args_size() { | |
3153 return in_ByteSize(_popframe_preserved_args_size); | |
3154 } | |
3155 | |
3156 WordSize JavaThread::popframe_preserved_args_size_in_words() { | |
3157 int sz = in_bytes(popframe_preserved_args_size()); | |
3158 assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); | |
3159 return in_WordSize(sz / wordSize); | |
3160 } | |
3161 | |
3162 void JavaThread::popframe_free_preserved_args() { | |
3163 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); | |
6197 | 3164 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args, mtThread); |
0 | 3165 _popframe_preserved_args = NULL; |
3166 _popframe_preserved_args_size = 0; | |
3167 } | |
3168 | |
3169 #ifndef PRODUCT | |
3170 | |
3171 void JavaThread::trace_frames() { | |
3172 tty->print_cr("[Describe stack]"); | |
3173 int frame_no = 1; | |
3174 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
3175 tty->print(" %d. ", frame_no++); | |
3176 fst.current()->print_value_on(tty,this); | |
3177 tty->cr(); | |
3178 } | |
3179 } | |
3180 | |
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|
3181 class PrintAndVerifyOopClosure: public OopClosure { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3182 protected: |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3183 template <class T> inline void do_oop_work(T* p) { |
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|
3184 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
3185 if (obj == NULL) return; |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3186 tty->print(INTPTR_FORMAT ": ", p); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3187 if (obj->is_oop_or_null()) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3188 if (obj->is_objArray()) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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changeset
|
3189 tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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changeset
|
3190 } else { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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changeset
|
3191 obj->print(); |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3192 } |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3193 } else { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3194 tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj); |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3195 } |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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changeset
|
3196 tty->cr(); |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3197 } |
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parents:
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|
3198 public: |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
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changeset
|
3199 virtual void do_oop(oop* p) { do_oop_work(p); } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3200 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3201 }; |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
changeset
|
3202 |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
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diff
changeset
|
3203 |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3204 static void oops_print(frame* f, const RegisterMap *map) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3205 PrintAndVerifyOopClosure print; |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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3899
diff
changeset
|
3206 f->print_value(); |
7179
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8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
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7177
diff
changeset
|
3207 f->oops_do(&print, NULL, NULL, (RegisterMap*)map); |
3908
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3208 } |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
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diff
changeset
|
3209 |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
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changeset
|
3210 // Print our all the locations that contain oops and whether they are |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3211 // valid or not. This useful when trying to find the oldest frame |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3212 // where an oop has gone bad since the frame walk is from youngest to |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
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changeset
|
3213 // oldest. |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
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|
3214 void JavaThread::trace_oops() { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
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changeset
|
3215 tty->print_cr("[Trace oops]"); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
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|
3216 frames_do(oops_print); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3217 } |
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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|
3218 |
0 | 3219 |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3220 #ifdef ASSERT |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3221 // 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
|
3222 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:
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changeset
|
3223 ResourceMark rm; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
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changeset
|
3224 PRESERVE_EXCEPTION_MARK; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
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diff
changeset
|
3225 FrameValues values; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3226 int frame_no = 0; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3227 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
|
3228 fst.current()->describe(values, ++frame_no); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3229 if (depth == frame_no) break; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3230 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3231 if (validate_only) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3232 values.validate(); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3233 } else { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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parents:
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diff
changeset
|
3234 tty->print_cr("[Describe stack layout]"); |
4042
b20d64f83668
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
4007
diff
changeset
|
3235 values.print(this); |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3236 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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parents:
2416
diff
changeset
|
3237 } |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
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diff
changeset
|
3238 #endif |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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|
3239 |
0 | 3240 void JavaThread::trace_stack_from(vframe* start_vf) { |
3241 ResourceMark rm; | |
3242 int vframe_no = 1; | |
3243 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3244 if (f->is_java_frame()) { | |
3245 javaVFrame::cast(f)->print_activation(vframe_no++); | |
3246 } else { | |
3247 f->print(); | |
3248 } | |
3249 if (vframe_no > StackPrintLimit) { | |
3250 tty->print_cr("...<more frames>..."); | |
3251 return; | |
3252 } | |
3253 } | |
3254 } | |
3255 | |
3256 | |
3257 void JavaThread::trace_stack() { | |
3258 if (!has_last_Java_frame()) return; | |
3259 ResourceMark rm; | |
3260 HandleMark hm; | |
3261 RegisterMap reg_map(this); | |
3262 trace_stack_from(last_java_vframe(®_map)); | |
3263 } | |
3264 | |
3265 | |
3266 #endif // PRODUCT | |
3267 | |
3268 | |
3269 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { | |
3270 assert(reg_map != NULL, "a map must be given"); | |
3271 frame f = last_frame(); | |
3272 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { | |
3273 if (vf->is_java_frame()) return javaVFrame::cast(vf); | |
3274 } | |
3275 return NULL; | |
3276 } | |
3277 | |
3278 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6198
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|
3279 Klass* JavaThread::security_get_caller_class(int depth) { |
0 | 3280 vframeStream vfst(this); |
3281 vfst.security_get_caller_frame(depth); | |
3282 if (!vfst.at_end()) { | |
3283 return vfst.method()->method_holder(); | |
3284 } | |
3285 return NULL; | |
3286 } | |
3287 | |
3288 static void compiler_thread_entry(JavaThread* thread, TRAPS) { | |
3289 assert(thread->is_Compiler_thread(), "must be compiler thread"); | |
3290 CompileBroker::compiler_thread_loop(); | |
3291 } | |
3292 | |
3293 // Create a CompilerThread | |
3294 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) | |
3295 : JavaThread(&compiler_thread_entry) { | |
3296 _env = NULL; | |
3297 _log = NULL; | |
3298 _task = NULL; | |
3299 _queue = queue; | |
3300 _counters = counters; | |
1584 | 3301 _buffer_blob = NULL; |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
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3336
diff
changeset
|
3302 _scanned_nmethod = NULL; |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
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12316
diff
changeset
|
3303 _compiler = NULL; |
0 | 3304 |
3305 #ifndef PRODUCT | |
3306 _ideal_graph_printer = NULL; | |
3307 #endif | |
3308 } | |
3309 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
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7177
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changeset
|
3310 void CompilerThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
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|
3311 JavaThread::oops_do(f, cld_f, cf); |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3312 if (_scanned_nmethod != NULL && cf != NULL) { |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3313 // 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
|
3314 // 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
|
3315 // a scan. |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3316 cf->do_code_blob(_scanned_nmethod); |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3317 } |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3318 } |
0 | 3319 |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3320 |
0 | 3321 // ======= Threads ======== |
3322 | |
3323 // The Threads class links together all active threads, and provides | |
3324 // operations over all threads. It is protected by its own Mutex | |
3325 // lock, which is also used in other contexts to protect thread | |
3326 // operations from having the thread being operated on from exiting | |
3327 // and going away unexpectedly (e.g., safepoint synchronization) | |
3328 | |
3329 JavaThread* Threads::_thread_list = NULL; | |
3330 int Threads::_number_of_threads = 0; | |
3331 int Threads::_number_of_non_daemon_threads = 0; | |
3332 int Threads::_return_code = 0; | |
3333 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
|
3334 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3335 bool Threads::_vm_complete = false; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3336 #endif |
0 | 3337 |
3338 // All JavaThreads | |
3339 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) | |
3340 | |
3341 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system) | |
3342 void Threads::threads_do(ThreadClosure* tc) { | |
3343 assert_locked_or_safepoint(Threads_lock); | |
3344 // ALL_JAVA_THREADS iterates through all JavaThreads | |
3345 ALL_JAVA_THREADS(p) { | |
3346 tc->do_thread(p); | |
3347 } | |
3348 // Someday we could have a table or list of all non-JavaThreads. | |
3349 // For now, just manually iterate through them. | |
3350 tc->do_thread(VMThread::vm_thread()); | |
3351 Universe::heap()->gc_threads_do(tc); | |
323
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3352 WatcherThread *wt = WatcherThread::watcher_thread(); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3353 // 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
|
3354 // 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
|
3355 // 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
|
3356 // 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
|
3357 // way to prevent termination of WatcherThread would be to acquire |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3358 // 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
|
3359 // checking in some cases. |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3360 if (wt != NULL) |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3361 tc->do_thread(wt); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3362 |
0 | 3363 // If CompilerThreads ever become non-JavaThreads, add them here |
3364 } | |
3365 | |
3366 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { | |
3367 | |
242 | 3368 extern void JDK_Version_init(); |
3369 | |
0 | 3370 // Check version |
3371 if (!is_supported_jni_version(args->version)) return JNI_EVERSION; | |
3372 | |
3373 // Initialize the output stream module | |
3374 ostream_init(); | |
3375 | |
3376 // Process java launcher properties. | |
3377 Arguments::process_sun_java_launcher_properties(args); | |
3378 | |
3379 // Initialize the os module before using TLS | |
3380 os::init(); | |
3381 | |
3382 // Initialize system properties. | |
3383 Arguments::init_system_properties(); | |
3384 | |
242 | 3385 // So that JDK version can be used as a discrimintor when parsing arguments |
3386 JDK_Version_init(); | |
3387 | |
1864
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3388 // Update/Initialize System properties after JDK version number is known |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3389 Arguments::init_version_specific_system_properties(); |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3390 |
0 | 3391 // Parse arguments |
3392 jint parse_result = Arguments::parse(args); | |
3393 if (parse_result != JNI_OK) return parse_result; | |
3394 | |
13114
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
3395 // Probe for existance of supported GPU and initialize it if one |
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
3396 // exists. |
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
3397 gpu::init(); |
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
3398 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3399 os::init_before_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3400 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3401 jint ergo_result = Arguments::apply_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3402 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
|
3403 |
0 | 3404 if (PauseAtStartup) { |
3405 os::pause(); | |
3406 } | |
3407 | |
4006 | 3408 #ifndef USDT2 |
0 | 3409 HS_DTRACE_PROBE(hotspot, vm__init__begin); |
4006 | 3410 #else /* USDT2 */ |
3411 HOTSPOT_VM_INIT_BEGIN(); | |
3412 #endif /* USDT2 */ | |
0 | 3413 |
3414 // Record VM creation timing statistics | |
3415 TraceVmCreationTime create_vm_timer; | |
3416 create_vm_timer.start(); | |
3417 | |
3418 // Timing (must come after argument parsing) | |
3419 TraceTime timer("Create VM", TraceStartupTime); | |
3420 | |
3421 // Initialize the os module after parsing the args | |
3422 jint os_init_2_result = os::init_2(); | |
3423 if (os_init_2_result != JNI_OK) return os_init_2_result; | |
3424 | |
7177
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3425 jint adjust_after_os_result = Arguments::adjust_after_os(); |
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3426 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
|
3427 |
6197 | 3428 // intialize TLS |
3429 ThreadLocalStorage::init(); | |
3430 | |
3431 // Bootstrap native memory tracking, so it can start recording memory | |
3432 // activities before worker thread is started. This is the first phase | |
3433 // of bootstrapping, VM is currently running in single-thread mode. | |
3434 MemTracker::bootstrap_single_thread(); | |
3435 | |
0 | 3436 // Initialize output stream logging |
3437 ostream_init_log(); | |
3438 | |
3439 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad | |
3440 // Must be before create_vm_init_agents() | |
3441 if (Arguments::init_libraries_at_startup()) { | |
3442 convert_vm_init_libraries_to_agents(); | |
3443 } | |
3444 | |
3445 // Launch -agentlib/-agentpath and converted -Xrun agents | |
3446 if (Arguments::init_agents_at_startup()) { | |
3447 create_vm_init_agents(); | |
3448 } | |
3449 | |
3450 // Initialize Threads state | |
3451 _thread_list = NULL; | |
3452 _number_of_threads = 0; | |
3453 _number_of_non_daemon_threads = 0; | |
3454 | |
3455 // Initialize global data structures and create system classes in heap | |
3456 vm_init_globals(); | |
3457 | |
3458 // Attach the main thread to this os thread | |
3459 JavaThread* main_thread = new JavaThread(); | |
3460 main_thread->set_thread_state(_thread_in_vm); | |
3461 // must do this before set_active_handles and initialize_thread_local_storage | |
3462 // Note: on solaris initialize_thread_local_storage() will (indirectly) | |
3463 // change the stack size recorded here to one based on the java thread | |
3464 // stacksize. This adjusted size is what is used to figure the placement | |
3465 // of the guard pages. | |
3466 main_thread->record_stack_base_and_size(); | |
3467 main_thread->initialize_thread_local_storage(); | |
3468 | |
3469 main_thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
3470 | |
3471 if (!main_thread->set_as_starting_thread()) { | |
3472 vm_shutdown_during_initialization( | |
3473 "Failed necessary internal allocation. Out of swap space"); | |
3474 delete main_thread; | |
3475 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3476 return JNI_ENOMEM; | |
3477 } | |
3478 | |
3479 // Enable guard page *after* os::create_main_thread(), otherwise it would | |
3480 // crash Linux VM, see notes in os_linux.cpp. | |
3481 main_thread->create_stack_guard_pages(); | |
3482 | |
1878 | 3483 // Initialize Java-Level synchronization subsystem |
3484 ObjectMonitor::Initialize() ; | |
0 | 3485 |
6197 | 3486 // Second phase of bootstrapping, VM is about entering multi-thread mode |
3487 MemTracker::bootstrap_multi_thread(); | |
3488 | |
0 | 3489 // Initialize global modules |
3490 jint status = init_globals(); | |
3491 if (status != JNI_OK) { | |
3492 delete main_thread; | |
3493 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3494 return status; | |
3495 } | |
3496 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3497 // Should be done after the heap is fully created |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3498 main_thread->cache_global_variables(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3499 |
0 | 3500 HandleMark hm; |
3501 | |
3502 { MutexLocker mu(Threads_lock); | |
3503 Threads::add(main_thread); | |
3504 } | |
3505 | |
3506 // Any JVMTI raw monitors entered in onload will transition into | |
3507 // real raw monitor. VM is setup enough here for raw monitor enter. | |
3508 JvmtiExport::transition_pending_onload_raw_monitors(); | |
3509 | |
6197 | 3510 // Fully start NMT |
3511 MemTracker::start(); | |
3512 | |
0 | 3513 // Create the VMThread |
3514 { TraceTime timer("Start VMThread", TraceStartupTime); | |
3515 VMThread::create(); | |
3516 Thread* vmthread = VMThread::vm_thread(); | |
3517 | |
3518 if (!os::create_thread(vmthread, os::vm_thread)) | |
3519 vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); | |
3520 | |
3521 // Wait for the VM thread to become ready, and VMThread::run to initialize | |
3522 // Monitors can have spurious returns, must always check another state flag | |
3523 { | |
3524 MutexLocker ml(Notify_lock); | |
3525 os::start_thread(vmthread); | |
3526 while (vmthread->active_handles() == NULL) { | |
3527 Notify_lock->wait(); | |
3528 } | |
3529 } | |
3530 } | |
3531 | |
3532 assert (Universe::is_fully_initialized(), "not initialized"); | |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3533 if (VerifyDuringStartup) { |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9071
diff
changeset
|
3534 // 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
|
3535 VM_Verify verify_op; |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3536 VMThread::execute(&verify_op); |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3537 } |
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3538 |
0 | 3539 EXCEPTION_MARK; |
3540 | |
3541 // At this point, the Universe is initialized, but we have not executed | |
3542 // any byte code. Now is a good time (the only time) to dump out the | |
3543 // internal state of the JVM for sharing. | |
3544 if (DumpSharedSpaces) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3545 MetaspaceShared::preload_and_dump(CHECK_0); |
0 | 3546 ShouldNotReachHere(); |
3547 } | |
3548 | |
3549 // Always call even when there are not JVMTI environments yet, since environments | |
3550 // may be attached late and JVMTI must track phases of VM execution | |
3551 JvmtiExport::enter_start_phase(); | |
3552 | |
3553 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. | |
3554 JvmtiExport::post_vm_start(); | |
3555 | |
3556 { | |
3557 TraceTime timer("Initialize java.lang classes", TraceStartupTime); | |
3558 | |
3559 if (EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3560 create_vm_init_libraries(); | |
3561 } | |
3562 | |
7608 | 3563 initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
0 | 3564 |
3565 // Initialize java_lang.System (needed before creating the thread) | |
7608 | 3566 initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
3567 initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); | |
3568 Handle thread_group = create_initial_thread_group(CHECK_0); | |
3569 Universe::set_main_thread_group(thread_group()); | |
3570 initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); | |
3571 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); | |
3572 main_thread->set_threadObj(thread_object); | |
3573 // Set thread status to running since main thread has | |
3574 // been started and running. | |
3575 java_lang_Thread::set_thread_status(thread_object, | |
3576 java_lang_Thread::RUNNABLE); | |
3577 | |
3578 // The VM creates & returns objects of this class. Make sure it's initialized. | |
3579 initialize_class(vmSymbols::java_lang_Class(), CHECK_0); | |
3580 | |
3581 // The VM preresolves methods to these classes. Make sure that they get initialized | |
3582 initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); | |
3583 initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); | |
3584 call_initializeSystemClass(CHECK_0); | |
3585 | |
3586 // get the Java runtime name after java.lang.System is initialized | |
3587 JDK_Version::set_runtime_name(get_java_runtime_name(THREAD)); | |
3588 JDK_Version::set_runtime_version(get_java_runtime_version(THREAD)); | |
0 | 3589 |
3590 // an instance of OutOfMemory exception has been allocated earlier | |
7608 | 3591 initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
3592 initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); | |
3593 initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); | |
3594 initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); | |
3595 initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); | |
3596 initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); | |
3597 initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); | |
3598 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
|
3599 } |
0 | 3600 |
3601 // See : bugid 4211085. | |
3602 // Background : the static initializer of java.lang.Compiler tries to read | |
3603 // property"java.compiler" and read & write property "java.vm.info". | |
3604 // When a security manager is installed through the command line | |
3605 // option "-Djava.security.manager", the above properties are not | |
3606 // readable and the static initializer for java.lang.Compiler fails | |
3607 // resulting in a NoClassDefFoundError. This can happen in any | |
3608 // user code which calls methods in java.lang.Compiler. | |
3609 // Hack : the hack is to pre-load and initialize this class, so that only | |
3610 // system domains are on the stack when the properties are read. | |
3611 // Currently even the AWT code has calls to methods in java.lang.Compiler. | |
3612 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT. | |
3613 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and | |
3614 // read and write"java.vm.info" in the default policy file. See bugid 4211383 | |
3615 // 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
|
3616 initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
0 | 3617 |
3618 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to | |
3619 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot | |
3620 // compiler does not get loaded through java.lang.Compiler). "java -version" with the | |
3621 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here. | |
3622 // This should also be taken out as soon as 4211383 gets fixed. | |
3623 reset_vm_info_property(CHECK_0); | |
3624 | |
3625 quicken_jni_functions(); | |
3626 | |
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3627 // Must be run after init_ft which initializes ft_enabled |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3628 if (TRACE_INITIALIZE() != JNI_OK) { |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3629 vm_exit_during_initialization("Failed to initialize tracing backend"); |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3630 } |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3631 |
0 | 3632 // Set flag that basic initialization has completed. Used by exceptions and various |
3633 // debug stuff, that does not work until all basic classes have been initialized. | |
3634 set_init_completed(); | |
3635 | |
4006 | 3636 #ifndef USDT2 |
0 | 3637 HS_DTRACE_PROBE(hotspot, vm__init__end); |
4006 | 3638 #else /* USDT2 */ |
3639 HOTSPOT_VM_INIT_END(); | |
3640 #endif /* USDT2 */ | |
0 | 3641 |
3642 // record VM initialization completion time | |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3643 #if INCLUDE_MANAGEMENT |
0 | 3644 Management::record_vm_init_completed(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3645 #endif // INCLUDE_MANAGEMENT |
0 | 3646 |
3647 // Compute system loader. Note that this has to occur after set_init_completed, since | |
3648 // valid exceptions may be thrown in the process. | |
3649 // Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and | |
3650 // set_init_completed has just been called, causing exceptions not to be shortcut | |
3651 // anymore. We call vm_exit_during_initialization directly instead. | |
3652 SystemDictionary::compute_java_system_loader(THREAD); | |
3653 if (HAS_PENDING_EXCEPTION) { | |
3654 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3655 } | |
3656 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3657 #if INCLUDE_ALL_GCS |
0 | 3658 // Support for ConcurrentMarkSweep. This should be cleaned up |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3659 // 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
|
3660 // once things are properly refactored. XXX YSR |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3661 if (UseConcMarkSweepGC || UseG1GC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3662 if (UseConcMarkSweepGC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3663 ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3664 } else { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3665 ConcurrentMarkThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3666 } |
0 | 3667 if (HAS_PENDING_EXCEPTION) { |
3668 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3669 } | |
3670 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3671 #endif // INCLUDE_ALL_GCS |
0 | 3672 |
3673 // Always call even when there are not JVMTI environments yet, since environments | |
3674 // may be attached late and JVMTI must track phases of VM execution | |
3675 JvmtiExport::enter_live_phase(); | |
3676 | |
3677 // Signal Dispatcher needs to be started before VMInit event is posted | |
3678 os::signal_init(); | |
3679 | |
3680 // Start Attach Listener if +StartAttachListener or it can't be started lazily | |
3681 if (!DisableAttachMechanism) { | |
11139
2e8f19c2feef
7162400: Intermittent java.io.IOException: Bad file number during HotSpotVirtualMachine.executeCommand
allwin
parents:
11136
diff
changeset
|
3682 AttachListener::vm_start(); |
0 | 3683 if (StartAttachListener || AttachListener::init_at_startup()) { |
3684 AttachListener::init(); | |
3685 } | |
3686 } | |
3687 | |
3688 // Launch -Xrun agents | |
3689 // Must be done in the JVMTI live phase so that for backward compatibility the JDWP | |
3690 // back-end can launch with -Xdebug -Xrunjdwp. | |
3691 if (!EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3692 create_vm_init_libraries(); | |
3693 } | |
3694 | |
6002
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3695 // 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
|
3696 JvmtiExport::post_vm_initialized(); |
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3697 |
10405 | 3698 if (TRACE_START() != JNI_OK) { |
3699 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
|
3700 } |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3701 |
3799
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3702 if (CleanChunkPoolAsync) { |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3703 Chunk::start_chunk_pool_cleaner_task(); |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3704 } |
0 | 3705 |
3706 // initialize compiler(s) | |
7212
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
3707 #if defined(COMPILER1) || defined(COMPILER2) || defined(SHARK) || defined(GRAALVM) |
0 | 3708 CompileBroker::compilation_init(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3709 #endif |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3710 |
12163
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3711 if (EnableInvokeDynamic) { |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3712 // 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
|
3713 // 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
|
3714 // signature polymorphic MH intrinsics can be missed |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3715 // (see SystemDictionary::find_method_handle_intrinsic). |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3716 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
|
3717 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
|
3718 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
|
3719 } |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3720 |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3721 #if INCLUDE_MANAGEMENT |
0 | 3722 Management::initialize(THREAD); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3723 #endif // INCLUDE_MANAGEMENT |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3724 |
0 | 3725 if (HAS_PENDING_EXCEPTION) { |
3726 // management agent fails to start possibly due to | |
3727 // configuration problem and is responsible for printing | |
3728 // stack trace if appropriate. Simply exit VM. | |
3729 vm_exit(1); | |
3730 } | |
3731 | |
3732 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); | |
3733 if (MemProfiling) MemProfiler::engage(); | |
3734 StatSampler::engage(); | |
3735 if (CheckJNICalls) JniPeriodicChecker::engage(); | |
3736 | |
3737 BiasedLocking::init(); | |
3738 | |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3739 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
|
3740 call_postVMInitHook(THREAD); |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3741 // 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
|
3742 // exceptions and provide means of diagnosis. |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3743 if (HAS_PENDING_EXCEPTION) { |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3744 CLEAR_PENDING_EXCEPTION; |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3745 } |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3746 } |
0 | 3747 |
6939
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3748 { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3749 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
|
3750 // 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
|
3751 // or by dynamic enrollment. |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3752 WatcherThread::make_startable(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3753 // 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
|
3754 // 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
|
3755 // 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
|
3756 // 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
|
3757 if (PeriodicTask::num_tasks() > 0) { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3758 WatcherThread::start(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3759 } |
0 | 3760 } |
3761 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3762 // Give os specific code one last chance to start |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3763 os::init_3(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3764 |
0 | 3765 create_vm_timer.end(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3766 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3767 _vm_complete = true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3768 #endif |
0 | 3769 return JNI_OK; |
3770 } | |
3771 | |
3772 // type for the Agent_OnLoad and JVM_OnLoad entry points | |
3773 extern "C" { | |
3774 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); | |
3775 } | |
3776 // Find a command line agent library and return its entry point for | |
3777 // -agentlib: -agentpath: -Xrun | |
3778 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. | |
3779 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { | |
3780 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
|
3781 void *library = NULL; |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3782 |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3783 if (!agent->valid()) { |
0 | 3784 char buffer[JVM_MAXPATHLEN]; |
3785 char ebuf[1024]; | |
3786 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
|
3787 const char *msg = "Could not find agent library "; |
0 | 3788 |
12220 | 3789 // 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
|
3790 if (os::find_builtin_agent(agent, on_load_symbols, num_symbol_entries)) { |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3791 library = agent->os_lib(); |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3792 } else if (agent->is_absolute_path()) { |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3793 library = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3794 if (library == NULL) { |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3795 const char *sub_msg = " in absolute path, with error: "; |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3796 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3797 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3798 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3799 // If we can't find the agent, exit. |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3800 vm_exit_during_initialization(buf, NULL); |
6197 | 3801 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3802 } |
3803 } else { | |
3804 // Try to load the agent from the standard dll directory | |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3805 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3806 name)) { |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3807 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3808 } |
0 | 3809 if (library == NULL) { // Try the local directory |
3810 char ns[1] = {0}; | |
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3811 if (os::dll_build_name(buffer, sizeof(buffer), ns, name)) { |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3812 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3813 } |
0 | 3814 if (library == NULL) { |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3815 const char *sub_msg = " on the library path, with error: "; |
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3816 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3817 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3818 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3819 // If we can't find the agent, exit. |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3820 vm_exit_during_initialization(buf, NULL); |
6197 | 3821 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3822 } |
3823 } | |
3824 } | |
3825 agent->set_os_lib(library); | |
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3826 agent->set_valid(); |
0 | 3827 } |
3828 | |
3829 // Find the OnLoad function. | |
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3830 on_load_entry = |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3831 CAST_TO_FN_PTR(OnLoadEntry_t, os::find_agent_function(agent, |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3832 false, |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3833 on_load_symbols, |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3834 num_symbol_entries)); |
0 | 3835 return on_load_entry; |
3836 } | |
3837 | |
3838 // Find the JVM_OnLoad entry point | |
3839 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { | |
3840 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; | |
3841 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3842 } | |
3843 | |
3844 // Find the Agent_OnLoad entry point | |
3845 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { | |
3846 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; | |
3847 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3848 } | |
3849 | |
3850 // For backwards compatibility with -Xrun | |
3851 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be | |
3852 // treated like -agentpath: | |
3853 // Must be called before agent libraries are created | |
3854 void Threads::convert_vm_init_libraries_to_agents() { | |
3855 AgentLibrary* agent; | |
3856 AgentLibrary* next; | |
3857 | |
3858 for (agent = Arguments::libraries(); agent != NULL; agent = next) { | |
3859 next = agent->next(); // cache the next agent now as this agent may get moved off this list | |
3860 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3861 | |
3862 // If there is an JVM_OnLoad function it will get called later, | |
3863 // otherwise see if there is an Agent_OnLoad | |
3864 if (on_load_entry == NULL) { | |
3865 on_load_entry = lookup_agent_on_load(agent); | |
3866 if (on_load_entry != NULL) { | |
3867 // switch it to the agent list -- so that Agent_OnLoad will be called, | |
3868 // JVM_OnLoad won't be attempted and Agent_OnUnload will | |
3869 Arguments::convert_library_to_agent(agent); | |
3870 } else { | |
3871 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); | |
3872 } | |
3873 } | |
3874 } | |
3875 } | |
3876 | |
3877 // Create agents for -agentlib: -agentpath: and converted -Xrun | |
3878 // Invokes Agent_OnLoad | |
3879 // Called very early -- before JavaThreads exist | |
3880 void Threads::create_vm_init_agents() { | |
3881 extern struct JavaVM_ main_vm; | |
3882 AgentLibrary* agent; | |
3883 | |
3884 JvmtiExport::enter_onload_phase(); | |
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3885 |
0 | 3886 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
3887 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); | |
3888 | |
3889 if (on_load_entry != NULL) { | |
3890 // Invoke the Agent_OnLoad function | |
3891 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3892 if (err != JNI_OK) { | |
3893 vm_exit_during_initialization("agent library failed to init", agent->name()); | |
3894 } | |
3895 } else { | |
3896 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); | |
3897 } | |
3898 } | |
3899 JvmtiExport::enter_primordial_phase(); | |
3900 } | |
3901 | |
3902 extern "C" { | |
3903 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); | |
3904 } | |
3905 | |
3906 void Threads::shutdown_vm_agents() { | |
3907 // Send any Agent_OnUnload notifications | |
3908 const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS; | |
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3909 size_t num_symbol_entries = ARRAY_SIZE(on_unload_symbols); |
0 | 3910 extern struct JavaVM_ main_vm; |
3911 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
3912 | |
3913 // Find the Agent_OnUnload function. | |
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3914 Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t, |
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3915 os::find_agent_function(agent, |
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3916 false, |
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3917 on_unload_symbols, |
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3918 num_symbol_entries)); |
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3919 |
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3920 // Invoke the Agent_OnUnload function |
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3921 if (unload_entry != NULL) { |
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3922 JavaThread* thread = JavaThread::current(); |
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3923 ThreadToNativeFromVM ttn(thread); |
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3924 HandleMark hm(thread); |
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3925 (*unload_entry)(&main_vm); |
0 | 3926 } |
3927 } | |
3928 } | |
3929 | |
3930 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries | |
3931 // Invokes JVM_OnLoad | |
3932 void Threads::create_vm_init_libraries() { | |
3933 extern struct JavaVM_ main_vm; | |
3934 AgentLibrary* agent; | |
3935 | |
3936 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { | |
3937 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3938 | |
3939 if (on_load_entry != NULL) { | |
3940 // Invoke the JVM_OnLoad function | |
3941 JavaThread* thread = JavaThread::current(); | |
3942 ThreadToNativeFromVM ttn(thread); | |
3943 HandleMark hm(thread); | |
3944 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3945 if (err != JNI_OK) { | |
3946 vm_exit_during_initialization("-Xrun library failed to init", agent->name()); | |
3947 } | |
3948 } else { | |
3949 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); | |
3950 } | |
3951 } | |
3952 } | |
3953 | |
3954 // Last thread running calls java.lang.Shutdown.shutdown() | |
3955 void JavaThread::invoke_shutdown_hooks() { | |
3956 HandleMark hm(this); | |
3957 | |
3958 // We could get here with a pending exception, if so clear it now. | |
3959 if (this->has_pending_exception()) { | |
3960 this->clear_pending_exception(); | |
3961 } | |
3962 | |
3963 EXCEPTION_MARK; | |
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3964 Klass* k = |
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3965 SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
0 | 3966 THREAD); |
3967 if (k != NULL) { | |
3968 // SystemDictionary::resolve_or_null will return null if there was | |
3969 // an exception. If we cannot load the Shutdown class, just don't | |
3970 // call Shutdown.shutdown() at all. This will mean the shutdown hooks | |
3971 // and finalizers (if runFinalizersOnExit is set) won't be run. | |
3972 // Note that if a shutdown hook was registered or runFinalizersOnExit | |
3973 // was called, the Shutdown class would have already been loaded | |
3974 // (Runtime.addShutdownHook and runFinalizersOnExit will load it). | |
3975 instanceKlassHandle shutdown_klass (THREAD, k); | |
3976 JavaValue result(T_VOID); | |
3977 JavaCalls::call_static(&result, | |
3978 shutdown_klass, | |
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3979 vmSymbols::shutdown_method_name(), |
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3980 vmSymbols::void_method_signature(), |
0 | 3981 THREAD); |
3982 } | |
3983 CLEAR_PENDING_EXCEPTION; | |
3984 } | |
3985 | |
3986 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when | |
3987 // the program falls off the end of main(). Another VM exit path is through | |
3988 // vm_exit() when the program calls System.exit() to return a value or when | |
3989 // there is a serious error in VM. The two shutdown paths are not exactly | |
3990 // the same, but they share Shutdown.shutdown() at Java level and before_exit() | |
3991 // and VM_Exit op at VM level. | |
3992 // | |
3993 // Shutdown sequence: | |
6197 | 3994 // + Shutdown native memory tracking if it is on |
0 | 3995 // + Wait until we are the last non-daemon thread to execute |
3996 // <-- every thing is still working at this moment --> | |
3997 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level | |
3998 // shutdown hooks, run finalizers if finalization-on-exit | |
3999 // + Call before_exit(), prepare for VM exit | |
4000 // > run VM level shutdown hooks (they are registered through JVM_OnExit(), | |
4001 // currently the only user of this mechanism is File.deleteOnExit()) | |
4002 // > stop flat profiler, StatSampler, watcher thread, CMS threads, | |
4003 // post thread end and vm death events to JVMTI, | |
4004 // stop signal thread | |
4005 // + Call JavaThread::exit(), it will: | |
4006 // > release JNI handle blocks, remove stack guard pages | |
4007 // > remove this thread from Threads list | |
4008 // <-- no more Java code from this thread after this point --> | |
4009 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop | |
4010 // the compiler threads at safepoint | |
4011 // <-- do not use anything that could get blocked by Safepoint --> | |
4012 // + Disable tracing at JNI/JVM barriers | |
4013 // + Set _vm_exited flag for threads that are still running native code | |
4014 // + Delete this thread | |
4015 // + Call exit_globals() | |
4016 // > deletes tty | |
4017 // > deletes PerfMemory resources | |
4018 // + Return to caller | |
4019 | |
4020 bool Threads::destroy_vm() { | |
4021 JavaThread* thread = JavaThread::current(); | |
4022 | |
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4023 #ifdef ASSERT |
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4024 _vm_complete = false; |
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4025 #endif |
0 | 4026 // Wait until we are the last non-daemon thread to execute |
4027 { MutexLocker nu(Threads_lock); | |
4028 while (Threads::number_of_non_daemon_threads() > 1 ) | |
4029 // This wait should make safepoint checks, wait without a timeout, | |
4030 // and wait as a suspend-equivalent condition. | |
4031 // | |
4032 // Note: If the FlatProfiler is running and this thread is waiting | |
4033 // for another non-daemon thread to finish, then the FlatProfiler | |
4034 // is waiting for the external suspend request on this thread to | |
4035 // complete. wait_for_ext_suspend_completion() will eventually | |
4036 // timeout, but that takes time. Making this wait a suspend- | |
4037 // equivalent condition solves that timeout problem. | |
4038 // | |
4039 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
4040 Mutex::_as_suspend_equivalent_flag); | |
4041 } | |
4042 | |
4043 // Hang forever on exit if we are reporting an error. | |
4044 if (ShowMessageBoxOnError && is_error_reported()) { | |
4045 os::infinite_sleep(); | |
4046 } | |
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4047 os::wait_for_keypress_at_exit(); |
0 | 4048 |
4049 if (JDK_Version::is_jdk12x_version()) { | |
4050 // We are the last thread running, so check if finalizers should be run. | |
4051 // For 1.3 or later this is done in thread->invoke_shutdown_hooks() | |
4052 HandleMark rm(thread); | |
4053 Universe::run_finalizers_on_exit(); | |
4054 } else { | |
4055 // run Java level shutdown hooks | |
4056 thread->invoke_shutdown_hooks(); | |
4057 } | |
4058 | |
4059 before_exit(thread); | |
4060 | |
4061 thread->exit(true); | |
4062 | |
4063 // Stop VM thread. | |
4064 { | |
4065 // 4945125 The vm thread comes to a safepoint during exit. | |
4066 // GC vm_operations can get caught at the safepoint, and the | |
4067 // heap is unparseable if they are caught. Grab the Heap_lock | |
4068 // to prevent this. The GC vm_operations will not be able to | |
4069 // queue until after the vm thread is dead. | |
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4070 // After this point, we'll never emerge out of the safepoint before |
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4071 // the VM exits, so concurrent GC threads do not need to be explicitly |
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4072 // stopped; they remain inactive until the process exits. |
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4073 // Note: some concurrent G1 threads may be running during a safepoint, |
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4074 // but these will not be accessing the heap, just some G1-specific side |
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4075 // data structures that are not accessed by any other threads but them |
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4076 // after this point in a terminal safepoint. |
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4077 |
0 | 4078 MutexLocker ml(Heap_lock); |
4079 | |
4080 VMThread::wait_for_vm_thread_exit(); | |
4081 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); | |
4082 VMThread::destroy(); | |
4083 } | |
4084 | |
4085 // clean up ideal graph printers | |
4086 #if defined(COMPILER2) && !defined(PRODUCT) | |
4087 IdealGraphPrinter::clean_up(); | |
4088 #endif | |
4089 | |
4090 // Now, all Java threads are gone except daemon threads. Daemon threads | |
4091 // running Java code or in VM are stopped by the Safepoint. However, | |
4092 // daemon threads executing native code are still running. But they | |
4093 // will be stopped at native=>Java/VM barriers. Note that we can't | |
4094 // simply kill or suspend them, as it is inherently deadlock-prone. | |
4095 | |
4096 #ifndef PRODUCT | |
4097 // disable function tracing at JNI/JVM barriers | |
4098 TraceJNICalls = false; | |
4099 TraceJVMCalls = false; | |
4100 TraceRuntimeCalls = false; | |
4101 #endif | |
4102 | |
4103 VM_Exit::set_vm_exited(); | |
4104 | |
4105 notify_vm_shutdown(); | |
4106 | |
4107 delete thread; | |
4108 | |
4109 // exit_globals() will delete tty | |
4110 exit_globals(); | |
4111 | |
4112 return true; | |
4113 } | |
4114 | |
4115 | |
4116 jboolean Threads::is_supported_jni_version_including_1_1(jint version) { | |
4117 if (version == JNI_VERSION_1_1) return JNI_TRUE; | |
4118 return is_supported_jni_version(version); | |
4119 } | |
4120 | |
4121 | |
4122 jboolean Threads::is_supported_jni_version(jint version) { | |
4123 if (version == JNI_VERSION_1_2) return JNI_TRUE; | |
4124 if (version == JNI_VERSION_1_4) return JNI_TRUE; | |
4125 if (version == JNI_VERSION_1_6) return JNI_TRUE; | |
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4126 if (version == JNI_VERSION_1_8) return JNI_TRUE; |
0 | 4127 return JNI_FALSE; |
4128 } | |
4129 | |
4130 | |
4131 void Threads::add(JavaThread* p, bool force_daemon) { | |
4132 // The threads lock must be owned at this point | |
4133 assert_locked_or_safepoint(Threads_lock); | |
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4134 |
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4135 // See the comment for this method in thread.hpp for its purpose and |
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4136 // why it is called here. |
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4137 p->initialize_queues(); |
0 | 4138 p->set_next(_thread_list); |
4139 _thread_list = p; | |
4140 _number_of_threads++; | |
4141 oop threadObj = p->threadObj(); | |
4142 bool daemon = true; | |
4143 // Bootstrapping problem: threadObj can be null for initial | |
4144 // JavaThread (or for threads attached via JNI) | |
4145 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { | |
4146 _number_of_non_daemon_threads++; | |
4147 daemon = false; | |
4148 } | |
4149 | |
6197 | 4150 p->set_safepoint_visible(true); |
4151 | |
0 | 4152 ThreadService::add_thread(p, daemon); |
4153 | |
4154 // Possible GC point. | |
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4155 Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
0 | 4156 } |
4157 | |
4158 void Threads::remove(JavaThread* p) { | |
4159 // Extra scope needed for Thread_lock, so we can check | |
4160 // that we do not remove thread without safepoint code notice | |
4161 { MutexLocker ml(Threads_lock); | |
4162 | |
4163 assert(includes(p), "p must be present"); | |
4164 | |
4165 JavaThread* current = _thread_list; | |
4166 JavaThread* prev = NULL; | |
4167 | |
4168 while (current != p) { | |
4169 prev = current; | |
4170 current = current->next(); | |
4171 } | |
4172 | |
4173 if (prev) { | |
4174 prev->set_next(current->next()); | |
4175 } else { | |
4176 _thread_list = p->next(); | |
4177 } | |
4178 _number_of_threads--; | |
4179 oop threadObj = p->threadObj(); | |
4180 bool daemon = true; | |
4181 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { | |
4182 _number_of_non_daemon_threads--; | |
4183 daemon = false; | |
4184 | |
4185 // Only one thread left, do a notify on the Threads_lock so a thread waiting | |
4186 // on destroy_vm will wake up. | |
4187 if (number_of_non_daemon_threads() == 1) | |
4188 Threads_lock->notify_all(); | |
4189 } | |
4190 ThreadService::remove_thread(p, daemon); | |
4191 | |
4192 // Make sure that safepoint code disregard this thread. This is needed since | |
4193 // the thread might mess around with locks after this point. This can cause it | |
4194 // to do callbacks into the safepoint code. However, the safepoint code is not aware | |
4195 // of this thread since it is removed from the queue. | |
4196 p->set_terminated_value(); | |
6197 | 4197 |
4198 // Now, this thread is not visible to safepoint | |
4199 p->set_safepoint_visible(false); | |
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4200 // once the thread becomes safepoint invisible, we can not use its per-thread |
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4201 // recorder. And Threads::do_threads() no longer walks this thread, so we have |
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4202 // to release its per-thread recorder here. |
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4203 MemTracker::thread_exiting(p); |
0 | 4204 } // unlock Threads_lock |
4205 | |
4206 // Since Events::log uses a lock, we grab it outside the Threads_lock | |
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4207 Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
0 | 4208 } |
4209 | |
4210 // Threads_lock must be held when this is called (or must be called during a safepoint) | |
4211 bool Threads::includes(JavaThread* p) { | |
4212 assert(Threads_lock->is_locked(), "sanity check"); | |
4213 ALL_JAVA_THREADS(q) { | |
4214 if (q == p ) { | |
4215 return true; | |
4216 } | |
4217 } | |
4218 return false; | |
4219 } | |
4220 | |
4221 // Operations on the Threads list for GC. These are not explicitly locked, | |
4222 // but the garbage collector must provide a safe context for them to run. | |
4223 // In particular, these things should never be called when the Threads_lock | |
4224 // is held by some other thread. (Note: the Safepoint abstraction also | |
4225 // uses the Threads_lock to gurantee this property. It also makes sure that | |
4226 // all threads gets blocked when exiting or starting). | |
4227 | |
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4228 void Threads::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4229 ALL_JAVA_THREADS(p) { |
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4230 p->oops_do(f, cld_f, cf); |
0 | 4231 } |
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4232 VMThread::vm_thread()->oops_do(f, cld_f, cf); |
0 | 4233 } |
4234 | |
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4235 void Threads::possibly_parallel_oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4236 // Introduce a mechanism allowing parallel threads to claim threads as |
4237 // root groups. Overhead should be small enough to use all the time, | |
4238 // even in sequential code. | |
4239 SharedHeap* sh = SharedHeap::heap(); | |
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4240 // Cannot yet substitute active_workers for n_par_threads |
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4241 // because of G1CollectedHeap::verify() use of |
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|
4242 // SharedHeap::process_strong_roots(). n_par_threads == 0 will |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4243 // 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
|
4244 // is being used for parallelism elsewhere. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4245 bool is_par = sh->n_par_threads() > 0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4246 assert(!is_par || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4042
diff
changeset
|
4247 (SharedHeap::heap()->n_par_threads() == |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
changeset
|
4248 SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
0 | 4249 int cp = SharedHeap::heap()->strong_roots_parity(); |
4250 ALL_JAVA_THREADS(p) { | |
4251 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
|
4252 p->oops_do(f, cld_f, cf); |
0 | 4253 } |
4254 } | |
4255 VMThread* vmt = VMThread::vm_thread(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4256 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
|
4257 vmt->oops_do(f, cld_f, cf); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4258 } |
0 | 4259 } |
4260 | |
8001
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8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4261 #if INCLUDE_ALL_GCS |
0 | 4262 // Used by ParallelScavenge |
4263 void Threads::create_thread_roots_tasks(GCTaskQueue* q) { | |
4264 ALL_JAVA_THREADS(p) { | |
4265 q->enqueue(new ThreadRootsTask(p)); | |
4266 } | |
4267 q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); | |
4268 } | |
4269 | |
4270 // Used by Parallel Old | |
4271 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { | |
4272 ALL_JAVA_THREADS(p) { | |
4273 q->enqueue(new ThreadRootsMarkingTask(p)); | |
4274 } | |
4275 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); | |
4276 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
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diff
changeset
|
4277 #endif // INCLUDE_ALL_GCS |
0 | 4278 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4279 void Threads::nmethods_do(CodeBlobClosure* cf) { |
0 | 4280 ALL_JAVA_THREADS(p) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4281 p->nmethods_do(cf); |
0 | 4282 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4283 VMThread::vm_thread()->nmethods_do(cf); |
0 | 4284 } |
4285 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4286 void Threads::metadata_do(void f(Metadata*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4287 ALL_JAVA_THREADS(p) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4288 p->metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4289 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4290 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4291 |
0 | 4292 void Threads::gc_epilogue() { |
4293 ALL_JAVA_THREADS(p) { | |
4294 p->gc_epilogue(); | |
4295 } | |
4296 } | |
4297 | |
4298 void Threads::gc_prologue() { | |
4299 ALL_JAVA_THREADS(p) { | |
4300 p->gc_prologue(); | |
4301 } | |
4302 } | |
4303 | |
4304 void Threads::deoptimized_wrt_marked_nmethods() { | |
4305 ALL_JAVA_THREADS(p) { | |
4306 p->deoptimized_wrt_marked_nmethods(); | |
4307 } | |
4308 } | |
4309 | |
4310 | |
4311 // Get count Java threads that are waiting to enter the specified monitor. | |
4312 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, | |
4313 address monitor, bool doLock) { | |
4314 assert(doLock || SafepointSynchronize::is_at_safepoint(), | |
4315 "must grab Threads_lock or be at safepoint"); | |
4316 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); | |
4317 | |
4318 int i = 0; | |
4319 { | |
4320 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4321 ALL_JAVA_THREADS(p) { | |
4322 if (p->is_Compiler_thread()) continue; | |
4323 | |
4324 address pending = (address)p->current_pending_monitor(); | |
4325 if (pending == monitor) { // found a match | |
4326 if (i < count) result->append(p); // save the first count matches | |
4327 i++; | |
4328 } | |
4329 } | |
4330 } | |
4331 return result; | |
4332 } | |
4333 | |
4334 | |
4335 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { | |
4336 assert(doLock || | |
4337 Threads_lock->owned_by_self() || | |
4338 SafepointSynchronize::is_at_safepoint(), | |
4339 "must grab Threads_lock or be at safepoint"); | |
4340 | |
4341 // NULL owner means not locked so we can skip the search | |
4342 if (owner == NULL) return NULL; | |
4343 | |
4344 { | |
4345 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4346 ALL_JAVA_THREADS(p) { | |
4347 // first, see if owner is the address of a Java thread | |
4348 if (owner == (address)p) return p; | |
4349 } | |
4350 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4351 // 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
|
4352 // 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
|
4353 // like deadlock detection. |
0 | 4354 if (UseHeavyMonitors) return NULL; |
4355 | |
4356 // | |
4357 // If we didn't find a matching Java thread and we didn't force use of | |
4358 // heavyweight monitors, then the owner is the stack address of the | |
4359 // Lock Word in the owning Java thread's stack. | |
4360 // | |
4361 JavaThread* the_owner = NULL; | |
4362 { | |
4363 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4364 ALL_JAVA_THREADS(q) { | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4365 if (q->is_lock_owned(owner)) { |
0 | 4366 the_owner = q; |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4367 break; |
0 | 4368 } |
4369 } | |
4370 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4371 // cannot assert on lack of success here; see above comment |
0 | 4372 return the_owner; |
4373 } | |
4374 | |
4375 // Threads::print_on() is called at safepoint by VM_PrintThreads operation. | |
4376 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { | |
4377 char buf[32]; | |
4378 st->print_cr(os::local_time_string(buf, sizeof(buf))); | |
4379 | |
4380 st->print_cr("Full thread dump %s (%s %s):", | |
4381 Abstract_VM_Version::vm_name(), | |
4382 Abstract_VM_Version::vm_release(), | |
4383 Abstract_VM_Version::vm_info_string() | |
4384 ); | |
4385 st->cr(); | |
4386 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4387 #if INCLUDE_ALL_GCS |
0 | 4388 // Dump concurrent locks |
4389 ConcurrentLocksDump concurrent_locks; | |
4390 if (print_concurrent_locks) { | |
4391 concurrent_locks.dump_at_safepoint(); | |
4392 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4393 #endif // INCLUDE_ALL_GCS |
0 | 4394 |
4395 ALL_JAVA_THREADS(p) { | |
4396 ResourceMark rm; | |
4397 p->print_on(st); | |
4398 if (print_stacks) { | |
4399 if (internal_format) { | |
4400 p->trace_stack(); | |
4401 } else { | |
4402 p->print_stack_on(st); | |
4403 } | |
4404 } | |
4405 st->cr(); | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4406 #if INCLUDE_ALL_GCS |
0 | 4407 if (print_concurrent_locks) { |
4408 concurrent_locks.print_locks_on(p, st); | |
4409 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4410 #endif // INCLUDE_ALL_GCS |
0 | 4411 } |
4412 | |
4413 VMThread::vm_thread()->print_on(st); | |
4414 st->cr(); | |
4415 Universe::heap()->print_gc_threads_on(st); | |
4416 WatcherThread* wt = WatcherThread::watcher_thread(); | |
6766 | 4417 if (wt != NULL) { |
4418 wt->print_on(st); | |
4419 st->cr(); | |
4420 } | |
0 | 4421 CompileBroker::print_compiler_threads_on(st); |
4422 st->flush(); | |
4423 } | |
4424 | |
4425 // Threads::print_on_error() is called by fatal error handler. It's possible | |
4426 // that VM is not at safepoint and/or current thread is inside signal handler. | |
4427 // Don't print stack trace, as the stack may not be walkable. Don't allocate | |
4428 // memory (even in resource area), it might deadlock the error handler. | |
4429 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { | |
4430 bool found_current = false; | |
4431 st->print_cr("Java Threads: ( => current thread )"); | |
4432 ALL_JAVA_THREADS(thread) { | |
4433 bool is_current = (current == thread); | |
4434 found_current = found_current || is_current; | |
4435 | |
4436 st->print("%s", is_current ? "=>" : " "); | |
4437 | |
4438 st->print(PTR_FORMAT, thread); | |
4439 st->print(" "); | |
4440 thread->print_on_error(st, buf, buflen); | |
4441 st->cr(); | |
4442 } | |
4443 st->cr(); | |
4444 | |
4445 st->print_cr("Other Threads:"); | |
4446 if (VMThread::vm_thread()) { | |
4447 bool is_current = (current == VMThread::vm_thread()); | |
4448 found_current = found_current || is_current; | |
4449 st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); | |
4450 | |
4451 st->print(PTR_FORMAT, VMThread::vm_thread()); | |
4452 st->print(" "); | |
4453 VMThread::vm_thread()->print_on_error(st, buf, buflen); | |
4454 st->cr(); | |
4455 } | |
4456 WatcherThread* wt = WatcherThread::watcher_thread(); | |
4457 if (wt != NULL) { | |
4458 bool is_current = (current == wt); | |
4459 found_current = found_current || is_current; | |
4460 st->print("%s", is_current ? "=>" : " "); | |
4461 | |
4462 st->print(PTR_FORMAT, wt); | |
4463 st->print(" "); | |
4464 wt->print_on_error(st, buf, buflen); | |
4465 st->cr(); | |
4466 } | |
4467 if (!found_current) { | |
4468 st->cr(); | |
4469 st->print("=>" PTR_FORMAT " (exited) ", current); | |
4470 current->print_on_error(st, buf, buflen); | |
4471 st->cr(); | |
4472 } | |
4473 } | |
4474 | |
1878 | 4475 // Internal SpinLock and Mutex |
4476 // Based on ParkEvent | |
4477 | |
4478 // Ad-hoc mutual exclusion primitives: SpinLock and Mux | |
0 | 4479 // |
1878 | 4480 // We employ SpinLocks _only for low-contention, fixed-length |
4481 // short-duration critical sections where we're concerned | |
4482 // about native mutex_t or HotSpot Mutex:: latency. | |
4483 // The mux construct provides a spin-then-block mutual exclusion | |
4484 // mechanism. | |
4485 // | |
4486 // Testing has shown that contention on the ListLock guarding gFreeList | |
4487 // is common. If we implement ListLock as a simple SpinLock it's common | |
4488 // for the JVM to devolve to yielding with little progress. This is true | |
4489 // despite the fact that the critical sections protected by ListLock are | |
4490 // extremely short. | |
0 | 4491 // |
1878 | 4492 // TODO-FIXME: ListLock should be of type SpinLock. |
4493 // We should make this a 1st-class type, integrated into the lock | |
4494 // hierarchy as leaf-locks. Critically, the SpinLock structure | |
4495 // should have sufficient padding to avoid false-sharing and excessive | |
4496 // cache-coherency traffic. | |
4497 | |
4498 | |
4499 typedef volatile int SpinLockT ; | |
4500 | |
4501 void Thread::SpinAcquire (volatile int * adr, const char * LockName) { | |
4502 if (Atomic::cmpxchg (1, adr, 0) == 0) { | |
4503 return ; // normal fast-path return | |
4504 } | |
4505 | |
4506 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy. | |
4507 TEVENT (SpinAcquire - ctx) ; | |
4508 int ctr = 0 ; | |
4509 int Yields = 0 ; | |
0 | 4510 for (;;) { |
1878 | 4511 while (*adr != 0) { |
4512 ++ctr ; | |
4513 if ((ctr & 0xFFF) == 0 || !os::is_MP()) { | |
4514 if (Yields > 5) { | |
4515 // Consider using a simple NakedSleep() instead. | |
4516 // Then SpinAcquire could be called by non-JVM threads | |
4517 Thread::current()->_ParkEvent->park(1) ; | |
4518 } else { | |
4519 os::NakedYield() ; | |
4520 ++Yields ; | |
4521 } | |
4522 } else { | |
4523 SpinPause() ; | |
0 | 4524 } |
1878 | 4525 } |
4526 if (Atomic::cmpxchg (1, adr, 0) == 0) return ; | |
0 | 4527 } |
4528 } | |
4529 | |
1878 | 4530 void Thread::SpinRelease (volatile int * adr) { |
4531 assert (*adr != 0, "invariant") ; | |
4532 OrderAccess::fence() ; // guarantee at least release consistency. | |
4533 // Roach-motel semantics. | |
4534 // It's safe if subsequent LDs and STs float "up" into the critical section, | |
4535 // but prior LDs and STs within the critical section can't be allowed | |
4536 // to reorder or float past the ST that releases the lock. | |
4537 *adr = 0 ; | |
0 | 4538 } |
4539 | |
1878 | 4540 // muxAcquire and muxRelease: |
4541 // | |
4542 // * muxAcquire and muxRelease support a single-word lock-word construct. | |
4543 // The LSB of the word is set IFF the lock is held. | |
4544 // The remainder of the word points to the head of a singly-linked list | |
4545 // of threads blocked on the lock. | |
4546 // | |
4547 // * The current implementation of muxAcquire-muxRelease uses its own | |
4548 // dedicated Thread._MuxEvent instance. If we're interested in | |
4549 // minimizing the peak number of extant ParkEvent instances then | |
4550 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long | |
4551 // as certain invariants were satisfied. Specifically, care would need | |
4552 // to be taken with regards to consuming unpark() "permits". | |
4553 // A safe rule of thumb is that a thread would never call muxAcquire() | |
4554 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently | |
4555 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could | |
4556 // consume an unpark() permit intended for monitorenter, for instance. | |
4557 // One way around this would be to widen the restricted-range semaphore | |
4558 // implemented in park(). Another alternative would be to provide | |
4559 // multiple instances of the PlatformEvent() for each thread. One | |
4560 // instance would be dedicated to muxAcquire-muxRelease, for instance. | |
4561 // | |
4562 // * Usage: | |
4563 // -- Only as leaf locks | |
4564 // -- for short-term locking only as muxAcquire does not perform | |
4565 // thread state transitions. | |
4566 // | |
4567 // Alternatives: | |
4568 // * We could implement muxAcquire and muxRelease with MCS or CLH locks | |
4569 // but with parking or spin-then-park instead of pure spinning. | |
4570 // * Use Taura-Oyama-Yonenzawa locks. | |
4571 // * It's possible to construct a 1-0 lock if we encode the lockword as | |
4572 // (List,LockByte). Acquire will CAS the full lockword while Release | |
4573 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so | |
4574 // acquiring threads use timers (ParkTimed) to detect and recover from | |
4575 // the stranding window. Thread/Node structures must be aligned on 256-byte | |
4576 // boundaries by using placement-new. | |
4577 // * Augment MCS with advisory back-link fields maintained with CAS(). | |
4578 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. | |
4579 // The validity of the backlinks must be ratified before we trust the value. | |
4580 // If the backlinks are invalid the exiting thread must back-track through the | |
4581 // the forward links, which are always trustworthy. | |
4582 // * Add a successor indication. The LockWord is currently encoded as | |
4583 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable | |
4584 // to provide the usual futile-wakeup optimization. | |
4585 // See RTStt for details. | |
4586 // * Consider schedctl.sc_nopreempt to cover the critical section. | |
4587 // | |
4588 | |
4589 | |
4590 typedef volatile intptr_t MutexT ; // Mux Lock-word | |
4591 enum MuxBits { LOCKBIT = 1 } ; | |
4592 | |
4593 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { | |
4594 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4595 if (w == 0) return ; | |
4596 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4597 return ; | |
4598 } | |
4599 | |
4600 TEVENT (muxAcquire - Contention) ; | |
4601 ParkEvent * const Self = Thread::current()->_MuxEvent ; | |
4602 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; | |
0 | 4603 for (;;) { |
1878 | 4604 int its = (os::is_MP() ? 100 : 0) + 1 ; |
4605 | |
4606 // Optional spin phase: spin-then-park strategy | |
4607 while (--its >= 0) { | |
4608 w = *Lock ; | |
4609 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4610 return ; | |
4611 } | |
4612 } | |
4613 | |
4614 Self->reset() ; | |
4615 Self->OnList = intptr_t(Lock) ; | |
4616 // The following fence() isn't _strictly necessary as the subsequent | |
4617 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4618 OrderAccess::fence(); | |
4619 for (;;) { | |
4620 w = *Lock ; | |
4621 if ((w & LOCKBIT) == 0) { | |
4622 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4623 Self->OnList = 0 ; // hygiene - allows stronger asserts | |
4624 return ; | |
4625 } | |
4626 continue ; // Interference -- *Lock changed -- Just retry | |
0 | 4627 } |
1878 | 4628 assert (w & LOCKBIT, "invariant") ; |
4629 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4630 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; | |
4631 } | |
4632 | |
4633 while (Self->OnList != 0) { | |
4634 Self->park() ; | |
4635 } | |
0 | 4636 } |
4637 } | |
4638 | |
1878 | 4639 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
4640 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4641 if (w == 0) return ; | |
4642 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4643 return ; | |
4644 } | |
4645 | |
4646 TEVENT (muxAcquire - Contention) ; | |
4647 ParkEvent * ReleaseAfter = NULL ; | |
4648 if (ev == NULL) { | |
4649 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; | |
4650 } | |
4651 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; | |
4652 for (;;) { | |
4653 guarantee (ev->OnList == 0, "invariant") ; | |
4654 int its = (os::is_MP() ? 100 : 0) + 1 ; | |
4655 | |
4656 // Optional spin phase: spin-then-park strategy | |
4657 while (--its >= 0) { | |
4658 w = *Lock ; | |
4659 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4660 if (ReleaseAfter != NULL) { | |
4661 ParkEvent::Release (ReleaseAfter) ; | |
4662 } | |
4663 return ; | |
4664 } | |
4665 } | |
4666 | |
4667 ev->reset() ; | |
4668 ev->OnList = intptr_t(Lock) ; | |
4669 // The following fence() isn't _strictly necessary as the subsequent | |
4670 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4671 OrderAccess::fence(); | |
4672 for (;;) { | |
4673 w = *Lock ; | |
4674 if ((w & LOCKBIT) == 0) { | |
4675 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4676 ev->OnList = 0 ; | |
4677 // We call ::Release while holding the outer lock, thus | |
4678 // artificially lengthening the critical section. | |
4679 // Consider deferring the ::Release() until the subsequent unlock(), | |
4680 // after we've dropped the outer lock. | |
4681 if (ReleaseAfter != NULL) { | |
4682 ParkEvent::Release (ReleaseAfter) ; | |
4683 } | |
4684 return ; | |
4685 } | |
4686 continue ; // Interference -- *Lock changed -- Just retry | |
4687 } | |
4688 assert (w & LOCKBIT, "invariant") ; | |
4689 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4690 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; | |
4691 } | |
4692 | |
4693 while (ev->OnList != 0) { | |
4694 ev->park() ; | |
4695 } | |
4696 } | |
4697 } | |
4698 | |
4699 // Release() must extract a successor from the list and then wake that thread. | |
4700 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme | |
4701 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based | |
4702 // Release() would : | |
4703 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. | |
4704 // (B) Extract a successor from the private list "in-hand" | |
4705 // (C) attempt to CAS() the residual back into *Lock over null. | |
4706 // If there were any newly arrived threads and the CAS() would fail. | |
4707 // In that case Release() would detach the RATs, re-merge the list in-hand | |
4708 // with the RATs and repeat as needed. Alternately, Release() might | |
4709 // detach and extract a successor, but then pass the residual list to the wakee. | |
4710 // The wakee would be responsible for reattaching and remerging before it | |
4711 // competed for the lock. | |
4712 // | |
4713 // Both "pop" and DMR are immune from ABA corruption -- there can be | |
4714 // multiple concurrent pushers, but only one popper or detacher. | |
4715 // This implementation pops from the head of the list. This is unfair, | |
4716 // but tends to provide excellent throughput as hot threads remain hot. | |
4717 // (We wake recently run threads first). | |
4718 | |
4719 void Thread::muxRelease (volatile intptr_t * Lock) { | |
4720 for (;;) { | |
4721 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; | |
4722 assert (w & LOCKBIT, "invariant") ; | |
4723 if (w == LOCKBIT) return ; | |
4724 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; | |
4725 assert (List != NULL, "invariant") ; | |
4726 assert (List->OnList == intptr_t(Lock), "invariant") ; | |
4727 ParkEvent * nxt = List->ListNext ; | |
4728 | |
4729 // The following CAS() releases the lock and pops the head element. | |
4730 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { | |
4731 continue ; | |
4732 } | |
4733 List->OnList = 0 ; | |
4734 OrderAccess::fence() ; | |
4735 List->unpark () ; | |
4736 return ; | |
4737 } | |
4738 } | |
4739 | |
4740 | |
0 | 4741 void Threads::verify() { |
4742 ALL_JAVA_THREADS(p) { | |
4743 p->verify(); | |
4744 } | |
4745 VMThread* thread = VMThread::vm_thread(); | |
4746 if (thread != NULL) thread->verify(); | |
4747 } |