Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.cpp @ 18929:8f2fb6bec986
removed GPU code
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 23 Jan 2015 10:54:21 +0100 |
parents | c307546c7b0a |
children | 7848fc12602b |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classLoader.hpp" | |
27 #include "classfile/javaClasses.hpp" | |
28 #include "classfile/systemDictionary.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/compileBroker.hpp" | |
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32 #ifdef GRAAL |
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33 #include "graal/graalCompiler.hpp" |
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34 #include "graal/graalRuntime.hpp" |
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35 #endif |
1972 | 36 #include "interpreter/interpreter.hpp" |
37 #include "interpreter/linkResolver.hpp" | |
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38 #include "interpreter/oopMapCache.hpp" |
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39 #include "jvmtifiles/jvmtiEnv.hpp" |
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40 #include "memory/gcLocker.inline.hpp" |
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41 #include "memory/metaspaceShared.hpp" |
1972 | 42 #include "memory/oopFactory.hpp" |
43 #include "memory/universe.inline.hpp" | |
44 #include "oops/instanceKlass.hpp" | |
45 #include "oops/objArrayOop.hpp" | |
46 #include "oops/oop.inline.hpp" | |
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47 #include "oops/symbol.hpp" |
1972 | 48 #include "prims/jvm_misc.hpp" |
49 #include "prims/jvmtiExport.hpp" | |
50 #include "prims/jvmtiThreadState.hpp" | |
51 #include "prims/privilegedStack.hpp" | |
52 #include "runtime/arguments.hpp" | |
53 #include "runtime/biasedLocking.hpp" | |
54 #include "runtime/deoptimization.hpp" | |
55 #include "runtime/fprofiler.hpp" | |
56 #include "runtime/frame.inline.hpp" | |
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 | |
17780 | 114 #if INCLUDE_RTM_OPT |
115 #include "runtime/rtmLocking.hpp" | |
116 #endif | |
0 | 117 |
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118 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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119 |
0 | 120 #ifdef DTRACE_ENABLED |
121 | |
122 // Only bother with this argument setup if dtrace is available | |
123 | |
4006 | 124 #ifndef USDT2 |
0 | 125 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
126 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); | |
127 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, | |
128 intptr_t, intptr_t, bool); | |
129 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, | |
130 intptr_t, intptr_t, bool); | |
131 | |
132 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
133 { \ | |
134 ResourceMark rm(this); \ | |
135 int len = 0; \ | |
136 const char* name = (javathread)->get_thread_name(); \ | |
137 len = strlen(name); \ | |
138 HS_DTRACE_PROBE5(hotspot, thread__##probe, \ | |
139 name, len, \ | |
140 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
141 (javathread)->osthread()->thread_id(), \ | |
142 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
143 } | |
144 | |
4006 | 145 #else /* USDT2 */ |
146 | |
147 #define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START | |
148 #define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP | |
149 | |
150 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
151 { \ | |
152 ResourceMark rm(this); \ | |
153 int len = 0; \ | |
154 const char* name = (javathread)->get_thread_name(); \ | |
155 len = strlen(name); \ | |
156 HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ | |
157 (char *) name, len, \ | |
158 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
159 (uintptr_t) (javathread)->osthread()->thread_id(), \ | |
160 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
161 } | |
162 | |
163 #endif /* USDT2 */ | |
164 | |
0 | 165 #else // ndef DTRACE_ENABLED |
166 | |
167 #define DTRACE_THREAD_PROBE(probe, javathread) | |
168 | |
169 #endif // ndef DTRACE_ENABLED | |
170 | |
6197 | 171 |
0 | 172 // Class hierarchy |
173 // - Thread | |
174 // - VMThread | |
175 // - WatcherThread | |
176 // - ConcurrentMarkSweepThread | |
177 // - JavaThread | |
178 // - CompilerThread | |
179 | |
180 // ======= Thread ======== | |
181 // Support for forcing alignment of thread objects for biased locking | |
6197 | 182 void* Thread::allocate(size_t size, bool throw_excpt, MEMFLAGS flags) { |
0 | 183 if (UseBiasedLocking) { |
184 const int alignment = markOopDesc::biased_lock_alignment; | |
185 size_t aligned_size = size + (alignment - sizeof(intptr_t)); | |
6197 | 186 void* real_malloc_addr = throw_excpt? AllocateHeap(aligned_size, flags, CURRENT_PC) |
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187 : AllocateHeap(aligned_size, flags, CURRENT_PC, |
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188 AllocFailStrategy::RETURN_NULL); |
0 | 189 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); |
190 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= | |
191 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), | |
192 "JavaThread alignment code overflowed allocated storage"); | |
193 if (TraceBiasedLocking) { | |
194 if (aligned_addr != real_malloc_addr) | |
195 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, | |
196 real_malloc_addr, aligned_addr); | |
197 } | |
198 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; | |
199 return aligned_addr; | |
200 } else { | |
6197 | 201 return throw_excpt? AllocateHeap(size, flags, CURRENT_PC) |
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202 : AllocateHeap(size, flags, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
0 | 203 } |
204 } | |
205 | |
206 void Thread::operator delete(void* p) { | |
207 if (UseBiasedLocking) { | |
208 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; | |
6197 | 209 FreeHeap(real_malloc_addr, mtThread); |
0 | 210 } else { |
6197 | 211 FreeHeap(p, mtThread); |
0 | 212 } |
213 } | |
214 | |
215 | |
216 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, | |
217 // JavaThread | |
218 | |
219 | |
220 Thread::Thread() { | |
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221 // stack and get_thread |
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222 set_stack_base(NULL); |
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223 set_stack_size(0); |
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224 set_self_raw_id(0); |
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225 set_lgrp_id(-1); |
0 | 226 |
227 // allocated data structures | |
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228 set_osthread(NULL); |
6197 | 229 set_resource_area(new (mtThread)ResourceArea()); |
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230 DEBUG_ONLY(_current_resource_mark = NULL;) |
6197 | 231 set_handle_area(new (mtThread) HandleArea(NULL)); |
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232 set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(30, true)); |
0 | 233 set_active_handles(NULL); |
234 set_free_handle_block(NULL); | |
235 set_last_handle_mark(NULL); | |
236 | |
237 // This initial value ==> never claimed. | |
238 _oops_do_parity = 0; | |
239 | |
240 // the handle mark links itself to last_handle_mark | |
10135 | 241 new HandleMark(this); |
242 | |
0 | 243 // plain initialization |
244 debug_only(_owned_locks = NULL;) | |
245 debug_only(_allow_allocation_count = 0;) | |
246 NOT_PRODUCT(_allow_safepoint_count = 0;) | |
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247 NOT_PRODUCT(_skip_gcalot = false;) |
0 | 248 _jvmti_env_iteration_count = 0; |
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249 set_allocated_bytes(0); |
0 | 250 _vm_operation_started_count = 0; |
251 _vm_operation_completed_count = 0; | |
252 _current_pending_monitor = NULL; | |
253 _current_pending_monitor_is_from_java = true; | |
254 _current_waiting_monitor = NULL; | |
255 _num_nested_signal = 0; | |
256 omFreeList = NULL ; | |
257 omFreeCount = 0 ; | |
258 omFreeProvision = 32 ; | |
1587 | 259 omInUseList = NULL ; |
260 omInUseCount = 0 ; | |
0 | 261 |
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262 #ifdef ASSERT |
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263 _visited_for_critical_count = false; |
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264 #endif |
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265 |
0 | 266 _SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true); |
267 _suspend_flags = 0; | |
268 | |
269 // thread-specific hashCode stream generator state - Marsaglia shift-xor form | |
270 _hashStateX = os::random() ; | |
271 _hashStateY = 842502087 ; | |
272 _hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ; | |
273 _hashStateW = 273326509 ; | |
274 | |
275 _OnTrap = 0 ; | |
276 _schedctl = NULL ; | |
277 _Stalled = 0 ; | |
278 _TypeTag = 0x2BAD ; | |
279 | |
280 // Many of the following fields are effectively final - immutable | |
281 // Note that nascent threads can't use the Native Monitor-Mutex | |
282 // construct until the _MutexEvent is initialized ... | |
283 // CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents | |
284 // we might instead use a stack of ParkEvents that we could provision on-demand. | |
285 // The stack would act as a cache to avoid calls to ParkEvent::Allocate() | |
286 // and ::Release() | |
287 _ParkEvent = ParkEvent::Allocate (this) ; | |
288 _SleepEvent = ParkEvent::Allocate (this) ; | |
289 _MutexEvent = ParkEvent::Allocate (this) ; | |
290 _MuxEvent = ParkEvent::Allocate (this) ; | |
291 | |
292 #ifdef CHECK_UNHANDLED_OOPS | |
293 if (CheckUnhandledOops) { | |
294 _unhandled_oops = new UnhandledOops(this); | |
295 } | |
296 #endif // CHECK_UNHANDLED_OOPS | |
297 #ifdef ASSERT | |
298 if (UseBiasedLocking) { | |
299 assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed"); | |
300 assert(this == _real_malloc_address || | |
301 this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment), | |
302 "bug in forced alignment of thread objects"); | |
303 } | |
304 #endif /* ASSERT */ | |
305 } | |
306 | |
307 void Thread::initialize_thread_local_storage() { | |
308 // Note: Make sure this method only calls | |
309 // non-blocking operations. Otherwise, it might not work | |
310 // with the thread-startup/safepoint interaction. | |
311 | |
312 // During Java thread startup, safepoint code should allow this | |
313 // method to complete because it may need to allocate memory to | |
314 // store information for the new thread. | |
315 | |
316 // initialize structure dependent on thread local storage | |
317 ThreadLocalStorage::set_thread(this); | |
318 } | |
319 | |
320 void Thread::record_stack_base_and_size() { | |
321 set_stack_base(os::current_stack_base()); | |
322 set_stack_size(os::current_stack_size()); | |
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323 if (is_Java_thread()) { |
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324 ((JavaThread*) this)->set_stack_overflow_limit(); |
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325 } |
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326 // CR 7190089: on Solaris, primordial thread's stack is adjusted |
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327 // in initialize_thread(). Without the adjustment, stack size is |
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328 // incorrect if stack is set to unlimited (ulimit -s unlimited). |
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329 // So far, only Solaris has real implementation of initialize_thread(). |
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330 // |
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331 // set up any platform-specific state. |
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332 os::initialize_thread(this); |
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333 |
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334 #if INCLUDE_NMT |
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335 // record thread's native stack, stack grows downward |
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336 address stack_low_addr = stack_base() - stack_size(); |
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337 MemTracker::record_thread_stack(stack_low_addr, stack_size(), this, |
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338 CURRENT_PC); |
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339 #endif // INCLUDE_NMT |
0 | 340 } |
341 | |
342 | |
343 Thread::~Thread() { | |
344 // Reclaim the objectmonitors from the omFreeList of the moribund thread. | |
345 ObjectSynchronizer::omFlush (this) ; | |
346 | |
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347 EVENT_THREAD_DESTRUCT(this); |
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348 |
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349 // stack_base can be NULL if the thread is never started or exited before |
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350 // record_stack_base_and_size called. Although, we would like to ensure |
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351 // that all started threads do call record_stack_base_and_size(), there is |
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352 // not proper way to enforce that. |
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353 #if INCLUDE_NMT |
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354 if (_stack_base != NULL) { |
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355 address low_stack_addr = stack_base() - stack_size(); |
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356 MemTracker::release_thread_stack(low_stack_addr, stack_size(), this); |
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357 #ifdef ASSERT |
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358 set_stack_base(NULL); |
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359 #endif |
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360 } |
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361 #endif // INCLUDE_NMT |
6197 | 362 |
0 | 363 // deallocate data structures |
364 delete resource_area(); | |
365 // since the handle marks are using the handle area, we have to deallocated the root | |
366 // handle mark before deallocating the thread's handle area, | |
367 assert(last_handle_mark() != NULL, "check we have an element"); | |
10135 | 368 delete last_handle_mark(); |
369 assert(last_handle_mark() == NULL, "check we have reached the end"); | |
0 | 370 |
371 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. | |
372 // We NULL out the fields for good hygiene. | |
373 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; | |
374 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; | |
375 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; | |
376 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; | |
377 | |
378 delete handle_area(); | |
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379 delete metadata_handles(); |
0 | 380 |
381 // osthread() can be NULL, if creation of thread failed. | |
382 if (osthread() != NULL) os::free_thread(osthread()); | |
383 | |
384 delete _SR_lock; | |
385 | |
386 // clear thread local storage if the Thread is deleting itself | |
387 if (this == Thread::current()) { | |
388 ThreadLocalStorage::set_thread(NULL); | |
389 } else { | |
390 // In the case where we're not the current thread, invalidate all the | |
391 // caches in case some code tries to get the current thread or the | |
392 // thread that was destroyed, and gets stale information. | |
393 ThreadLocalStorage::invalidate_all(); | |
394 } | |
395 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) | |
396 } | |
397 | |
398 // NOTE: dummy function for assertion purpose. | |
399 void Thread::run() { | |
400 ShouldNotReachHere(); | |
401 } | |
402 | |
403 #ifdef ASSERT | |
404 // Private method to check for dangling thread pointer | |
405 void check_for_dangling_thread_pointer(Thread *thread) { | |
406 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
407 "possibility of dangling Thread pointer"); | |
408 } | |
409 #endif | |
410 | |
411 | |
412 #ifndef PRODUCT | |
413 // Tracing method for basic thread operations | |
414 void Thread::trace(const char* msg, const Thread* const thread) { | |
415 if (!TraceThreadEvents) return; | |
416 ResourceMark rm; | |
417 ThreadCritical tc; | |
418 const char *name = "non-Java thread"; | |
419 int prio = -1; | |
420 if (thread->is_Java_thread() | |
421 && !thread->is_Compiler_thread()) { | |
422 // The Threads_lock must be held to get information about | |
423 // this thread but may not be in some situations when | |
424 // tracing thread events. | |
425 bool release_Threads_lock = false; | |
426 if (!Threads_lock->owned_by_self()) { | |
427 Threads_lock->lock(); | |
428 release_Threads_lock = true; | |
429 } | |
430 JavaThread* jt = (JavaThread *)thread; | |
431 name = (char *)jt->get_thread_name(); | |
432 oop thread_oop = jt->threadObj(); | |
433 if (thread_oop != NULL) { | |
434 prio = java_lang_Thread::priority(thread_oop); | |
435 } | |
436 if (release_Threads_lock) { | |
437 Threads_lock->unlock(); | |
438 } | |
439 } | |
440 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); | |
441 } | |
442 #endif | |
443 | |
444 | |
445 ThreadPriority Thread::get_priority(const Thread* const thread) { | |
446 trace("get priority", thread); | |
447 ThreadPriority priority; | |
448 // Can return an error! | |
449 (void)os::get_priority(thread, priority); | |
450 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); | |
451 return priority; | |
452 } | |
453 | |
454 void Thread::set_priority(Thread* thread, ThreadPriority priority) { | |
455 trace("set priority", thread); | |
456 debug_only(check_for_dangling_thread_pointer(thread);) | |
457 // Can return an error! | |
458 (void)os::set_priority(thread, priority); | |
459 } | |
460 | |
461 | |
462 void Thread::start(Thread* thread) { | |
463 trace("start", thread); | |
464 // Start is different from resume in that its safety is guaranteed by context or | |
465 // being called from a Java method synchronized on the Thread object. | |
466 if (!DisableStartThread) { | |
467 if (thread->is_Java_thread()) { | |
468 // Initialize the thread state to RUNNABLE before starting this thread. | |
469 // Can not set it after the thread started because we do not know the | |
470 // exact thread state at that time. It could be in MONITOR_WAIT or | |
471 // in SLEEPING or some other state. | |
472 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), | |
473 java_lang_Thread::RUNNABLE); | |
474 } | |
475 os::start_thread(thread); | |
476 } | |
477 } | |
478 | |
479 // Enqueue a VM_Operation to do the job for us - sometime later | |
480 void Thread::send_async_exception(oop java_thread, oop java_throwable) { | |
481 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); | |
482 VMThread::execute(vm_stop); | |
483 } | |
484 | |
485 | |
486 // | |
487 // Check if an external suspend request has completed (or has been | |
488 // cancelled). Returns true if the thread is externally suspended and | |
489 // false otherwise. | |
490 // | |
491 // The bits parameter returns information about the code path through | |
492 // the routine. Useful for debugging: | |
493 // | |
494 // set in is_ext_suspend_completed(): | |
495 // 0x00000001 - routine was entered | |
496 // 0x00000010 - routine return false at end | |
497 // 0x00000100 - thread exited (return false) | |
498 // 0x00000200 - suspend request cancelled (return false) | |
499 // 0x00000400 - thread suspended (return true) | |
500 // 0x00001000 - thread is in a suspend equivalent state (return true) | |
501 // 0x00002000 - thread is native and walkable (return true) | |
502 // 0x00004000 - thread is native_trans and walkable (needed retry) | |
503 // | |
504 // set in wait_for_ext_suspend_completion(): | |
505 // 0x00010000 - routine was entered | |
506 // 0x00020000 - suspend request cancelled before loop (return false) | |
507 // 0x00040000 - thread suspended before loop (return true) | |
508 // 0x00080000 - suspend request cancelled in loop (return false) | |
509 // 0x00100000 - thread suspended in loop (return true) | |
510 // 0x00200000 - suspend not completed during retry loop (return false) | |
511 // | |
512 | |
513 // Helper class for tracing suspend wait debug bits. | |
514 // | |
515 // 0x00000100 indicates that the target thread exited before it could | |
516 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and | |
517 // 0x00080000 each indicate a cancelled suspend request so they don't | |
518 // count as wait failures either. | |
519 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) | |
520 | |
521 class TraceSuspendDebugBits : public StackObj { | |
522 private: | |
523 JavaThread * jt; | |
524 bool is_wait; | |
525 bool called_by_wait; // meaningful when !is_wait | |
526 uint32_t * bits; | |
527 | |
528 public: | |
529 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, | |
530 uint32_t *_bits) { | |
531 jt = _jt; | |
532 is_wait = _is_wait; | |
533 called_by_wait = _called_by_wait; | |
534 bits = _bits; | |
535 } | |
536 | |
537 ~TraceSuspendDebugBits() { | |
538 if (!is_wait) { | |
539 #if 1 | |
540 // By default, don't trace bits for is_ext_suspend_completed() calls. | |
541 // That trace is very chatty. | |
542 return; | |
543 #else | |
544 if (!called_by_wait) { | |
545 // If tracing for is_ext_suspend_completed() is enabled, then only | |
546 // trace calls to it from wait_for_ext_suspend_completion() | |
547 return; | |
548 } | |
549 #endif | |
550 } | |
551 | |
552 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { | |
553 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { | |
554 MutexLocker ml(Threads_lock); // needed for get_thread_name() | |
555 ResourceMark rm; | |
556 | |
557 tty->print_cr( | |
558 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", | |
559 jt->get_thread_name(), *bits); | |
560 | |
561 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); | |
562 } | |
563 } | |
564 } | |
565 }; | |
566 #undef DEBUG_FALSE_BITS | |
567 | |
568 | |
569 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { | |
570 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); | |
571 | |
572 bool did_trans_retry = false; // only do thread_in_native_trans retry once | |
573 bool do_trans_retry; // flag to force the retry | |
574 | |
575 *bits |= 0x00000001; | |
576 | |
577 do { | |
578 do_trans_retry = false; | |
579 | |
580 if (is_exiting()) { | |
581 // Thread is in the process of exiting. This is always checked | |
582 // first to reduce the risk of dereferencing a freed JavaThread. | |
583 *bits |= 0x00000100; | |
584 return false; | |
585 } | |
586 | |
587 if (!is_external_suspend()) { | |
588 // Suspend request is cancelled. This is always checked before | |
589 // is_ext_suspended() to reduce the risk of a rogue resume | |
590 // confusing the thread that made the suspend request. | |
591 *bits |= 0x00000200; | |
592 return false; | |
593 } | |
594 | |
595 if (is_ext_suspended()) { | |
596 // thread is suspended | |
597 *bits |= 0x00000400; | |
598 return true; | |
599 } | |
600 | |
601 // Now that we no longer do hard suspends of threads running | |
602 // native code, the target thread can be changing thread state | |
603 // while we are in this routine: | |
604 // | |
605 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked | |
606 // | |
607 // We save a copy of the thread state as observed at this moment | |
608 // and make our decision about suspend completeness based on the | |
609 // copy. This closes the race where the thread state is seen as | |
610 // _thread_in_native_trans in the if-thread_blocked check, but is | |
611 // seen as _thread_blocked in if-thread_in_native_trans check. | |
612 JavaThreadState save_state = thread_state(); | |
613 | |
614 if (save_state == _thread_blocked && is_suspend_equivalent()) { | |
615 // If the thread's state is _thread_blocked and this blocking | |
616 // condition is known to be equivalent to a suspend, then we can | |
617 // consider the thread to be externally suspended. This means that | |
618 // the code that sets _thread_blocked has been modified to do | |
619 // self-suspension if the blocking condition releases. We also | |
620 // used to check for CONDVAR_WAIT here, but that is now covered by | |
621 // the _thread_blocked with self-suspension check. | |
622 // | |
623 // Return true since we wouldn't be here unless there was still an | |
624 // external suspend request. | |
625 *bits |= 0x00001000; | |
626 return true; | |
627 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) { | |
628 // Threads running native code will self-suspend on native==>VM/Java | |
629 // transitions. If its stack is walkable (should always be the case | |
630 // unless this function is called before the actual java_suspend() | |
631 // call), then the wait is done. | |
632 *bits |= 0x00002000; | |
633 return true; | |
634 } else if (!called_by_wait && !did_trans_retry && | |
635 save_state == _thread_in_native_trans && | |
636 frame_anchor()->walkable()) { | |
637 // The thread is transitioning from thread_in_native to another | |
638 // thread state. check_safepoint_and_suspend_for_native_trans() | |
639 // will force the thread to self-suspend. If it hasn't gotten | |
640 // there yet we may have caught the thread in-between the native | |
641 // code check above and the self-suspend. Lucky us. If we were | |
642 // called by wait_for_ext_suspend_completion(), then it | |
643 // will be doing the retries so we don't have to. | |
644 // | |
645 // Since we use the saved thread state in the if-statement above, | |
646 // there is a chance that the thread has already transitioned to | |
647 // _thread_blocked by the time we get here. In that case, we will | |
648 // make a single unnecessary pass through the logic below. This | |
649 // doesn't hurt anything since we still do the trans retry. | |
650 | |
651 *bits |= 0x00004000; | |
652 | |
653 // Once the thread leaves thread_in_native_trans for another | |
654 // thread state, we break out of this retry loop. We shouldn't | |
655 // need this flag to prevent us from getting back here, but | |
656 // sometimes paranoia is good. | |
657 did_trans_retry = true; | |
658 | |
659 // We wait for the thread to transition to a more usable state. | |
660 for (int i = 1; i <= SuspendRetryCount; i++) { | |
661 // We used to do an "os::yield_all(i)" call here with the intention | |
662 // that yielding would increase on each retry. However, the parameter | |
663 // is ignored on Linux which means the yield didn't scale up. Waiting | |
664 // on the SR_lock below provides a much more predictable scale up for | |
665 // the delay. It also provides a simple/direct point to check for any | |
666 // safepoint requests from the VMThread | |
667 | |
668 // temporarily drops SR_lock while doing wait with safepoint check | |
669 // (if we're a JavaThread - the WatcherThread can also call this) | |
670 // and increase delay with each retry | |
671 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
672 | |
673 // check the actual thread state instead of what we saved above | |
674 if (thread_state() != _thread_in_native_trans) { | |
675 // the thread has transitioned to another thread state so | |
676 // try all the checks (except this one) one more time. | |
677 do_trans_retry = true; | |
678 break; | |
679 } | |
680 } // end retry loop | |
681 | |
682 | |
683 } | |
684 } while (do_trans_retry); | |
685 | |
686 *bits |= 0x00000010; | |
687 return false; | |
688 } | |
689 | |
690 // | |
691 // Wait for an external suspend request to complete (or be cancelled). | |
692 // Returns true if the thread is externally suspended and false otherwise. | |
693 // | |
694 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, | |
695 uint32_t *bits) { | |
696 TraceSuspendDebugBits tsdb(this, true /* is_wait */, | |
697 false /* !called_by_wait */, bits); | |
698 | |
699 // local flag copies to minimize SR_lock hold time | |
700 bool is_suspended; | |
701 bool pending; | |
702 uint32_t reset_bits; | |
703 | |
704 // set a marker so is_ext_suspend_completed() knows we are the caller | |
705 *bits |= 0x00010000; | |
706 | |
707 // We use reset_bits to reinitialize the bits value at the top of | |
708 // each retry loop. This allows the caller to make use of any | |
709 // unused bits for their own marking purposes. | |
710 reset_bits = *bits; | |
711 | |
712 { | |
713 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
714 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
715 delay, bits); | |
716 pending = is_external_suspend(); | |
717 } | |
718 // must release SR_lock to allow suspension to complete | |
719 | |
720 if (!pending) { | |
721 // A cancelled suspend request is the only false return from | |
722 // is_ext_suspend_completed() that keeps us from entering the | |
723 // retry loop. | |
724 *bits |= 0x00020000; | |
725 return false; | |
726 } | |
727 | |
728 if (is_suspended) { | |
729 *bits |= 0x00040000; | |
730 return true; | |
731 } | |
732 | |
733 for (int i = 1; i <= retries; i++) { | |
734 *bits = reset_bits; // reinit to only track last retry | |
735 | |
736 // We used to do an "os::yield_all(i)" call here with the intention | |
737 // that yielding would increase on each retry. However, the parameter | |
738 // is ignored on Linux which means the yield didn't scale up. Waiting | |
739 // on the SR_lock below provides a much more predictable scale up for | |
740 // the delay. It also provides a simple/direct point to check for any | |
741 // safepoint requests from the VMThread | |
742 | |
743 { | |
744 MutexLocker ml(SR_lock()); | |
745 // wait with safepoint check (if we're a JavaThread - the WatcherThread | |
746 // can also call this) and increase delay with each retry | |
747 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
748 | |
749 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
750 delay, bits); | |
751 | |
752 // It is possible for the external suspend request to be cancelled | |
753 // (by a resume) before the actual suspend operation is completed. | |
754 // Refresh our local copy to see if we still need to wait. | |
755 pending = is_external_suspend(); | |
756 } | |
757 | |
758 if (!pending) { | |
759 // A cancelled suspend request is the only false return from | |
760 // is_ext_suspend_completed() that keeps us from staying in the | |
761 // retry loop. | |
762 *bits |= 0x00080000; | |
763 return false; | |
764 } | |
765 | |
766 if (is_suspended) { | |
767 *bits |= 0x00100000; | |
768 return true; | |
769 } | |
770 } // end retry loop | |
771 | |
772 // thread did not suspend after all our retries | |
773 *bits |= 0x00200000; | |
774 return false; | |
775 } | |
776 | |
777 #ifndef PRODUCT | |
778 void JavaThread::record_jump(address target, address instr, const char* file, int line) { | |
779 | |
780 // This should not need to be atomic as the only way for simultaneous | |
781 // updates is via interrupts. Even then this should be rare or non-existant | |
782 // and we don't care that much anyway. | |
783 | |
784 int index = _jmp_ring_index; | |
785 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); | |
786 _jmp_ring[index]._target = (intptr_t) target; | |
787 _jmp_ring[index]._instruction = (intptr_t) instr; | |
788 _jmp_ring[index]._file = file; | |
789 _jmp_ring[index]._line = line; | |
790 } | |
791 #endif /* PRODUCT */ | |
792 | |
793 // Called by flat profiler | |
794 // Callers have already called wait_for_ext_suspend_completion | |
795 // The assertion for that is currently too complex to put here: | |
796 bool JavaThread::profile_last_Java_frame(frame* _fr) { | |
797 bool gotframe = false; | |
798 // self suspension saves needed state. | |
799 if (has_last_Java_frame() && _anchor.walkable()) { | |
800 *_fr = pd_last_frame(); | |
801 gotframe = true; | |
802 } | |
803 return gotframe; | |
804 } | |
805 | |
806 void Thread::interrupt(Thread* thread) { | |
807 trace("interrupt", thread); | |
808 debug_only(check_for_dangling_thread_pointer(thread);) | |
809 os::interrupt(thread); | |
810 } | |
811 | |
812 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { | |
813 trace("is_interrupted", thread); | |
814 debug_only(check_for_dangling_thread_pointer(thread);) | |
815 // Note: If clear_interrupted==false, this simply fetches and | |
816 // returns the value of the field osthread()->interrupted(). | |
817 return os::is_interrupted(thread, clear_interrupted); | |
818 } | |
819 | |
820 | |
821 // GC Support | |
822 bool Thread::claim_oops_do_par_case(int strong_roots_parity) { | |
823 jint thread_parity = _oops_do_parity; | |
824 if (thread_parity != strong_roots_parity) { | |
825 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); | |
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826 if (res == thread_parity) { |
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827 return true; |
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828 } else { |
0 | 829 guarantee(res == strong_roots_parity, "Or else what?"); |
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830 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
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831 "Should only fail when parallel."); |
0 | 832 return false; |
833 } | |
834 } | |
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835 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
0 | 836 "Should only fail when parallel."); |
837 return false; | |
838 } | |
839 | |
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840 void Thread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 841 active_handles()->oops_do(f); |
842 // Do oop for ThreadShadow | |
843 f->do_oop((oop*)&_pending_exception); | |
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844 #ifdef GRAAL |
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845 f->do_oop((oop*)&_pending_failed_speculation); |
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846 #endif |
0 | 847 handle_area()->oops_do(f); |
848 } | |
849 | |
989
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850 void Thread::nmethods_do(CodeBlobClosure* cf) { |
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851 // no nmethods in a generic thread... |
0 | 852 } |
853 | |
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854 void Thread::metadata_do(void f(Metadata*)) { |
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855 if (metadata_handles() != NULL) { |
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856 for (int i = 0; i< metadata_handles()->length(); i++) { |
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857 f(metadata_handles()->at(i)); |
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858 } |
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859 } |
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860 } |
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861 |
0 | 862 void Thread::print_on(outputStream* st) const { |
863 // get_priority assumes osthread initialized | |
864 if (osthread() != NULL) { | |
6766 | 865 int os_prio; |
866 if (os::get_native_priority(this, &os_prio) == OS_OK) { | |
867 st->print("os_prio=%d ", os_prio); | |
868 } | |
869 st->print("tid=" INTPTR_FORMAT " ", this); | |
0 | 870 osthread()->print_on(st); |
871 } | |
872 debug_only(if (WizardMode) print_owned_locks_on(st);) | |
873 } | |
874 | |
875 // Thread::print_on_error() is called by fatal error handler. Don't use | |
876 // any lock or allocate memory. | |
877 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { | |
878 if (is_VM_thread()) st->print("VMThread"); | |
879 else if (is_Compiler_thread()) st->print("CompilerThread"); | |
880 else if (is_Java_thread()) st->print("JavaThread"); | |
881 else if (is_GC_task_thread()) st->print("GCTaskThread"); | |
882 else if (is_Watcher_thread()) st->print("WatcherThread"); | |
883 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); | |
884 else st->print("Thread"); | |
885 | |
886 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", | |
887 _stack_base - _stack_size, _stack_base); | |
888 | |
889 if (osthread()) { | |
890 st->print(" [id=%d]", osthread()->thread_id()); | |
891 } | |
892 } | |
893 | |
894 #ifdef ASSERT | |
895 void Thread::print_owned_locks_on(outputStream* st) const { | |
896 Monitor *cur = _owned_locks; | |
897 if (cur == NULL) { | |
898 st->print(" (no locks) "); | |
899 } else { | |
900 st->print_cr(" Locks owned:"); | |
901 while(cur) { | |
902 cur->print_on(st); | |
903 cur = cur->next(); | |
904 } | |
905 } | |
906 } | |
907 | |
908 static int ref_use_count = 0; | |
909 | |
910 bool Thread::owns_locks_but_compiled_lock() const { | |
911 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
912 if (cur != Compile_lock) return true; | |
913 } | |
914 return false; | |
915 } | |
916 | |
917 | |
918 #endif | |
919 | |
920 #ifndef PRODUCT | |
921 | |
922 // The flag: potential_vm_operation notifies if this particular safepoint state could potential | |
923 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that | |
924 // no threads which allow_vm_block's are held | |
925 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { | |
926 // Check if current thread is allowed to block at a safepoint | |
927 if (!(_allow_safepoint_count == 0)) | |
928 fatal("Possible safepoint reached by thread that does not allow it"); | |
929 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { | |
930 fatal("LEAF method calling lock?"); | |
931 } | |
932 | |
933 #ifdef ASSERT | |
934 if (potential_vm_operation && is_Java_thread() | |
935 && !Universe::is_bootstrapping()) { | |
936 // Make sure we do not hold any locks that the VM thread also uses. | |
937 // This could potentially lead to deadlocks | |
938 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
939 // Threads_lock is special, since the safepoint synchronization will not start before this is | |
940 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, | |
941 // since it is used to transfer control between JavaThreads and the VMThread | |
942 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! | |
943 if ( (cur->allow_vm_block() && | |
944 cur != Threads_lock && | |
945 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation | |
946 cur != VMOperationRequest_lock && | |
947 cur != VMOperationQueue_lock) || | |
948 cur->rank() == Mutex::special) { | |
949 warning("Thread holding lock at safepoint that vm can block on: %s", cur->name()); | |
950 } | |
951 } | |
952 } | |
953 | |
954 if (GCALotAtAllSafepoints) { | |
955 // We could enter a safepoint here and thus have a gc | |
956 InterfaceSupport::check_gc_alot(); | |
957 } | |
958 #endif | |
959 } | |
960 #endif | |
961 | |
962 bool Thread::is_in_stack(address adr) const { | |
963 assert(Thread::current() == this, "is_in_stack can only be called from current thread"); | |
964 address end = os::current_stack_pointer(); | |
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965 // Allow non Java threads to call this without stack_base |
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966 if (_stack_base == NULL) return true; |
0 | 967 if (stack_base() >= adr && adr >= end) return true; |
968 | |
969 return false; | |
970 } | |
971 | |
972 | |
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973 bool Thread::is_in_usable_stack(address adr) const { |
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974 size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0; |
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975 size_t usable_stack_size = _stack_size - stack_guard_size; |
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976 |
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977 return ((adr < stack_base()) && (adr >= stack_base() - usable_stack_size)); |
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978 } |
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979 |
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980 |
0 | 981 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter |
982 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being | |
983 // used for compilation in the future. If that change is made, the need for these methods | |
984 // should be revisited, and they should be removed if possible. | |
985 | |
986 bool Thread::is_lock_owned(address adr) const { | |
1688
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987 return on_local_stack(adr); |
0 | 988 } |
989 | |
990 bool Thread::set_as_starting_thread() { | |
991 // NOTE: this must be called inside the main thread. | |
992 return os::create_main_thread((JavaThread*)this); | |
993 } | |
994 | |
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995 static void initialize_class(Symbol* class_name, TRAPS) { |
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996 Klass* klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
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997 InstanceKlass::cast(klass)->initialize(CHECK); |
0 | 998 } |
999 | |
1000 | |
1001 // Creates the initial ThreadGroup | |
1002 static Handle create_initial_thread_group(TRAPS) { | |
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1003 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
0 | 1004 instanceKlassHandle klass (THREAD, k); |
1005 | |
1006 Handle system_instance = klass->allocate_instance_handle(CHECK_NH); | |
1007 { | |
1008 JavaValue result(T_VOID); | |
1009 JavaCalls::call_special(&result, | |
1010 system_instance, | |
1011 klass, | |
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1012 vmSymbols::object_initializer_name(), |
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1013 vmSymbols::void_method_signature(), |
0 | 1014 CHECK_NH); |
1015 } | |
1016 Universe::set_system_thread_group(system_instance()); | |
1017 | |
1018 Handle main_instance = klass->allocate_instance_handle(CHECK_NH); | |
1019 { | |
1020 JavaValue result(T_VOID); | |
1021 Handle string = java_lang_String::create_from_str("main", CHECK_NH); | |
1022 JavaCalls::call_special(&result, | |
1023 main_instance, | |
1024 klass, | |
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1025 vmSymbols::object_initializer_name(), |
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1026 vmSymbols::threadgroup_string_void_signature(), |
0 | 1027 system_instance, |
1028 string, | |
1029 CHECK_NH); | |
1030 } | |
1031 return main_instance; | |
1032 } | |
1033 | |
1034 // Creates the initial Thread | |
1035 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { | |
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1036 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
0 | 1037 instanceKlassHandle klass (THREAD, k); |
1038 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); | |
1039 | |
1040 java_lang_Thread::set_thread(thread_oop(), thread); | |
1041 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1042 thread->set_threadObj(thread_oop()); | |
1043 | |
1044 Handle string = java_lang_String::create_from_str("main", CHECK_NULL); | |
1045 | |
1046 JavaValue result(T_VOID); | |
1047 JavaCalls::call_special(&result, thread_oop, | |
1048 klass, | |
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1049 vmSymbols::object_initializer_name(), |
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1050 vmSymbols::threadgroup_string_void_signature(), |
0 | 1051 thread_group, |
1052 string, | |
1053 CHECK_NULL); | |
1054 return thread_oop(); | |
1055 } | |
1056 | |
1057 static void call_initializeSystemClass(TRAPS) { | |
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1058 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1059 instanceKlassHandle klass (THREAD, k); |
1060 | |
1061 JavaValue result(T_VOID); | |
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1062 JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
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1063 vmSymbols::void_method_signature(), CHECK); |
0 | 1064 } |
1065 | |
6181 | 1066 char java_runtime_name[128] = ""; |
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1067 char java_runtime_version[128] = ""; |
6181 | 1068 |
1069 // extract the JRE name from sun.misc.Version.java_runtime_name | |
1070 static const char* get_java_runtime_name(TRAPS) { | |
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1071 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
6181 | 1072 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
1073 fieldDescriptor fd; | |
1074 bool found = k != NULL && | |
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1075 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_name_name(), |
6181 | 1076 vmSymbols::string_signature(), &fd); |
1077 if (found) { | |
1078 oop name_oop = k->java_mirror()->obj_field(fd.offset()); | |
1079 if (name_oop == NULL) | |
1080 return NULL; | |
1081 const char* name = java_lang_String::as_utf8_string(name_oop, | |
1082 java_runtime_name, | |
1083 sizeof(java_runtime_name)); | |
1084 return name; | |
1085 } else { | |
1086 return NULL; | |
1087 } | |
1088 } | |
1089 | |
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1090 // extract the JRE version from sun.misc.Version.java_runtime_version |
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1091 static const char* get_java_runtime_version(TRAPS) { |
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1092 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
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1093 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
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1094 fieldDescriptor fd; |
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1095 bool found = k != NULL && |
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1096 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_version_name(), |
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1097 vmSymbols::string_signature(), &fd); |
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1098 if (found) { |
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1099 oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
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1100 if (name_oop == NULL) |
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1101 return NULL; |
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1102 const char* name = java_lang_String::as_utf8_string(name_oop, |
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1103 java_runtime_version, |
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1104 sizeof(java_runtime_version)); |
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1105 return name; |
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1106 } else { |
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1107 return NULL; |
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1108 } |
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1109 } |
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1110 |
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1111 // General purpose hook into Java code, run once when the VM is initialized. |
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1112 // The Java library method itself may be changed independently from the VM. |
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1113 static void call_postVMInitHook(TRAPS) { |
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1114 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_PostVMInitHook(), THREAD); |
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1115 instanceKlassHandle klass (THREAD, k); |
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1116 if (klass.not_null()) { |
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1117 JavaValue result(T_VOID); |
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1118 JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
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1119 vmSymbols::void_method_signature(), |
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1120 CHECK); |
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1121 } |
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1122 } |
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1123 |
0 | 1124 static void reset_vm_info_property(TRAPS) { |
1125 // the vm info string | |
1126 ResourceMark rm(THREAD); | |
1127 const char *vm_info = VM_Version::vm_info_string(); | |
1128 | |
1129 // java.lang.System class | |
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1130 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1131 instanceKlassHandle klass (THREAD, k); |
1132 | |
1133 // setProperty arguments | |
1134 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); | |
1135 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); | |
1136 | |
1137 // return value | |
1138 JavaValue r(T_OBJECT); | |
1139 | |
1140 // public static String setProperty(String key, String value); | |
1141 JavaCalls::call_static(&r, | |
1142 klass, | |
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1143 vmSymbols::setProperty_name(), |
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1144 vmSymbols::string_string_string_signature(), |
0 | 1145 key_str, |
1146 value_str, | |
1147 CHECK); | |
1148 } | |
1149 | |
1150 | |
1151 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { | |
1152 assert(thread_group.not_null(), "thread group should be specified"); | |
1153 assert(threadObj() == NULL, "should only create Java thread object once"); | |
1154 | |
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1155 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 1156 instanceKlassHandle klass (THREAD, k); |
1157 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
1158 | |
1159 java_lang_Thread::set_thread(thread_oop(), this); | |
1160 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1161 set_threadObj(thread_oop()); | |
1162 | |
1163 JavaValue result(T_VOID); | |
1164 if (thread_name != NULL) { | |
1165 Handle name = java_lang_String::create_from_str(thread_name, CHECK); | |
1166 // Thread gets assigned specified name and null target | |
1167 JavaCalls::call_special(&result, | |
1168 thread_oop, | |
1169 klass, | |
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1170 vmSymbols::object_initializer_name(), |
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1171 vmSymbols::threadgroup_string_void_signature(), |
0 | 1172 thread_group, // Argument 1 |
1173 name, // Argument 2 | |
1174 THREAD); | |
1175 } else { | |
1176 // Thread gets assigned name "Thread-nnn" and null target | |
1177 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) | |
1178 JavaCalls::call_special(&result, | |
1179 thread_oop, | |
1180 klass, | |
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1181 vmSymbols::object_initializer_name(), |
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1182 vmSymbols::threadgroup_runnable_void_signature(), |
0 | 1183 thread_group, // Argument 1 |
1184 Handle(), // Argument 2 | |
1185 THREAD); | |
1186 } | |
1187 | |
1188 | |
1189 if (daemon) { | |
1190 java_lang_Thread::set_daemon(thread_oop()); | |
1191 } | |
1192 | |
1193 if (HAS_PENDING_EXCEPTION) { | |
1194 return; | |
1195 } | |
1196 | |
1142 | 1197 KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
0 | 1198 Handle threadObj(this, this->threadObj()); |
1199 | |
1200 JavaCalls::call_special(&result, | |
1201 thread_group, | |
1202 group, | |
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1203 vmSymbols::add_method_name(), |
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1204 vmSymbols::thread_void_signature(), |
0 | 1205 threadObj, // Arg 1 |
1206 THREAD); | |
1207 | |
1208 | |
1209 } | |
1210 | |
1211 // NamedThread -- non-JavaThread subclasses with multiple | |
1212 // uniquely named instances should derive from this. | |
1213 NamedThread::NamedThread() : Thread() { | |
1214 _name = NULL; | |
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1215 _processed_thread = NULL; |
0 | 1216 } |
1217 | |
1218 NamedThread::~NamedThread() { | |
1219 if (_name != NULL) { | |
6197 | 1220 FREE_C_HEAP_ARRAY(char, _name, mtThread); |
0 | 1221 _name = NULL; |
1222 } | |
1223 } | |
1224 | |
1225 void NamedThread::set_name(const char* format, ...) { | |
1226 guarantee(_name == NULL, "Only get to set name once."); | |
6197 | 1227 _name = NEW_C_HEAP_ARRAY(char, max_name_len, mtThread); |
0 | 1228 guarantee(_name != NULL, "alloc failure"); |
1229 va_list ap; | |
1230 va_start(ap, format); | |
1231 jio_vsnprintf(_name, max_name_len, format, ap); | |
1232 va_end(ap); | |
1233 } | |
1234 | |
1235 // ======= WatcherThread ======== | |
1236 | |
1237 // The watcher thread exists to simulate timer interrupts. It should | |
1238 // be replaced by an abstraction over whatever native support for | |
1239 // timer interrupts exists on the platform. | |
1240 | |
1241 WatcherThread* WatcherThread::_watcher_thread = NULL; | |
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1242 bool WatcherThread::_startable = false; |
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1243 volatile bool WatcherThread::_should_terminate = false; |
0 | 1244 |
11151 | 1245 WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) { |
0 | 1246 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); |
1247 if (os::create_thread(this, os::watcher_thread)) { | |
1248 _watcher_thread = this; | |
1249 | |
1250 // Set the watcher thread to the highest OS priority which should not be | |
1251 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY | |
1252 // is created. The only normal thread using this priority is the reference | |
1253 // handler thread, which runs for very short intervals only. | |
1254 // If the VMThread's priority is not lower than the WatcherThread profiling | |
1255 // will be inaccurate. | |
1256 os::set_priority(this, MaxPriority); | |
1257 if (!DisableStartThread) { | |
1258 os::start_thread(this); | |
1259 } | |
1260 } | |
1261 } | |
1262 | |
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1263 int WatcherThread::sleep() const { |
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1264 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1265 |
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1266 // remaining will be zero if there are no tasks, |
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1267 // causing the WatcherThread to sleep until a task is |
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1268 // enrolled |
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1269 int remaining = PeriodicTask::time_to_wait(); |
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1270 int time_slept = 0; |
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1271 |
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1272 // we expect this to timeout - we only ever get unparked when |
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1273 // we should terminate or when a new task has been enrolled |
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1274 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
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1275 |
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1276 jlong time_before_loop = os::javaTimeNanos(); |
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1277 |
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1278 for (;;) { |
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1279 bool timedout = PeriodicTask_lock->wait(Mutex::_no_safepoint_check_flag, remaining); |
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1280 jlong now = os::javaTimeNanos(); |
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1281 |
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1282 if (remaining == 0) { |
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1283 // if we didn't have any tasks we could have waited for a long time |
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1284 // consider the time_slept zero and reset time_before_loop |
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1285 time_slept = 0; |
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1286 time_before_loop = now; |
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1287 } else { |
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1288 // need to recalulate since we might have new tasks in _tasks |
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1289 time_slept = (int) ((now - time_before_loop) / 1000000); |
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1290 } |
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1291 |
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1292 // Change to task list or spurious wakeup of some kind |
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1293 if (timedout || _should_terminate) { |
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1294 break; |
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1295 } |
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1296 |
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1297 remaining = PeriodicTask::time_to_wait(); |
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1298 if (remaining == 0) { |
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1299 // Last task was just disenrolled so loop around and wait until |
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1300 // another task gets enrolled |
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1301 continue; |
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1302 } |
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1303 |
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1304 remaining -= time_slept; |
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1305 if (remaining <= 0) |
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1306 break; |
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1307 } |
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1308 |
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1309 return time_slept; |
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1310 } |
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1311 |
0 | 1312 void WatcherThread::run() { |
1313 assert(this == watcher_thread(), "just checking"); | |
1314 | |
1315 this->record_stack_base_and_size(); | |
1316 this->initialize_thread_local_storage(); | |
1317 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1318 while(!_should_terminate) { | |
1319 assert(watcher_thread() == Thread::current(), "thread consistency check"); | |
1320 assert(watcher_thread() == this, "thread consistency check"); | |
1321 | |
1322 // Calculate how long it'll be until the next PeriodicTask work | |
1323 // should be done, and sleep that amount of time. | |
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1324 int time_waited = sleep(); |
0 | 1325 |
1326 if (is_error_reported()) { | |
1327 // A fatal error has happened, the error handler(VMError::report_and_die) | |
1328 // should abort JVM after creating an error log file. However in some | |
1329 // rare cases, the error handler itself might deadlock. Here we try to | |
1330 // kill JVM if the fatal error handler fails to abort in 2 minutes. | |
1331 // | |
1332 // This code is in WatcherThread because WatcherThread wakes up | |
1333 // periodically so the fatal error handler doesn't need to do anything; | |
1334 // also because the WatcherThread is less likely to crash than other | |
1335 // threads. | |
1336 | |
1337 for (;;) { | |
1338 if (!ShowMessageBoxOnError | |
1339 && (OnError == NULL || OnError[0] == '\0') | |
1340 && Arguments::abort_hook() == NULL) { | |
1341 os::sleep(this, 2 * 60 * 1000, false); | |
1342 fdStream err(defaultStream::output_fd()); | |
1343 err.print_raw_cr("# [ timer expired, abort... ]"); | |
1344 // skip atexit/vm_exit/vm_abort hooks | |
1345 os::die(); | |
1346 } | |
1347 | |
1348 // Wake up 5 seconds later, the fatal handler may reset OnError or | |
1349 // ShowMessageBoxOnError when it is ready to abort. | |
1350 os::sleep(this, 5 * 1000, false); | |
1351 } | |
1352 } | |
1353 | |
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1354 PeriodicTask::real_time_tick(time_waited); |
0 | 1355 } |
1356 | |
1357 // Signal that it is terminated | |
1358 { | |
1359 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); | |
1360 _watcher_thread = NULL; | |
1361 Terminator_lock->notify(); | |
1362 } | |
1363 | |
1364 // Thread destructor usually does this.. | |
1365 ThreadLocalStorage::set_thread(NULL); | |
1366 } | |
1367 | |
1368 void WatcherThread::start() { | |
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1369 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1370 |
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1371 if (watcher_thread() == NULL && _startable) { |
0 | 1372 _should_terminate = false; |
1373 // Create the single instance of WatcherThread | |
1374 new WatcherThread(); | |
1375 } | |
1376 } | |
1377 | |
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1378 void WatcherThread::make_startable() { |
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1379 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1380 _startable = true; |
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1381 } |
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1382 |
0 | 1383 void WatcherThread::stop() { |
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1384 { |
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1385 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1386 _should_terminate = true; |
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1387 OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
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1388 |
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1389 WatcherThread* watcher = watcher_thread(); |
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1390 if (watcher != NULL) |
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1391 watcher->unpark(); |
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1392 } |
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1393 |
0 | 1394 // it is ok to take late safepoints here, if needed |
1395 MutexLocker mu(Terminator_lock); | |
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1396 |
0 | 1397 while(watcher_thread() != NULL) { |
1398 // This wait should make safepoint checks, wait without a timeout, | |
1399 // and wait as a suspend-equivalent condition. | |
1400 // | |
1401 // Note: If the FlatProfiler is running, then this thread is waiting | |
1402 // for the WatcherThread to terminate and the WatcherThread, via the | |
1403 // FlatProfiler task, is waiting for the external suspend request on | |
1404 // this thread to complete. wait_for_ext_suspend_completion() will | |
1405 // eventually timeout, but that takes time. Making this wait a | |
1406 // suspend-equivalent condition solves that timeout problem. | |
1407 // | |
1408 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
1409 Mutex::_as_suspend_equivalent_flag); | |
1410 } | |
1411 } | |
1412 | |
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1413 void WatcherThread::unpark() { |
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1414 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1415 PeriodicTask_lock->notify(); |
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1416 } |
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1417 |
0 | 1418 void WatcherThread::print_on(outputStream* st) const { |
1419 st->print("\"%s\" ", name()); | |
1420 Thread::print_on(st); | |
1421 st->cr(); | |
1422 } | |
1423 | |
1424 // ======= JavaThread ======== | |
1425 | |
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1426 #ifdef GRAAL |
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1427 |
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1428 jlong* JavaThread::_graal_old_thread_counters; |
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1429 |
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|
1430 bool graal_counters_include(JavaThread* thread) { |
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|
1431 oop threadObj = thread->threadObj(); |
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removed reference to com.oracle.graal.compiler.CompilerThread from VM code
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1432 return !GraalCountersExcludeCompiler || !thread->is_Compiler_thread(); |
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1433 } |
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1434 |
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1435 void JavaThread::collect_counters(typeArrayOop array) { |
13796
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1436 if (GraalCounterSize > 0) { |
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1437 MutexLocker tl(Threads_lock); |
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1438 for (int i = 0; i < array->length(); i++) { |
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1439 array->long_at_put(i, _graal_old_thread_counters[i]); |
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1440 } |
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1441 for (JavaThread* tp = Threads::first(); tp != NULL; tp = tp->next()) { |
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1442 if (graal_counters_include(tp)) { |
13796
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1443 for (int i = 0; i < array->length(); i++) { |
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1444 array->long_at_put(i, array->long_at(i) + tp->_graal_counters[i]); |
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1445 } |
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1446 } |
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1447 } |
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|
1448 } |
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|
1449 } |
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|
1450 |
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1451 #endif // GRAAL |
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1452 |
0 | 1453 // A JavaThread is a normal Java thread |
1454 | |
1455 void JavaThread::initialize() { | |
1456 // Initialize fields | |
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1457 |
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|
1458 // Set the claimed par_id to UINT_MAX (ie not claiming any par_ids) |
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1459 set_claimed_par_id(UINT_MAX); |
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1460 |
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22d11b3bc561
Various hacks to be able to install machine code from a Java thread.
Thomas Wuerthinger <thomas@wuerthinger.net>
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|
1461 _buffer_blob = NULL; |
0 | 1462 set_saved_exception_pc(NULL); |
1463 set_threadObj(NULL); | |
1464 _anchor.clear(); | |
1465 set_entry_point(NULL); | |
1466 set_jni_functions(jni_functions()); | |
1467 set_callee_target(NULL); | |
1468 set_vm_result(NULL); | |
1469 set_vm_result_2(NULL); | |
1470 set_vframe_array_head(NULL); | |
1471 set_vframe_array_last(NULL); | |
1472 set_deferred_locals(NULL); | |
1473 set_deopt_mark(NULL); | |
1814
fd5d4527cdf5
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|
1474 set_deopt_nmethod(NULL); |
0 | 1475 clear_must_deopt_id(); |
1476 set_monitor_chunks(NULL); | |
1477 set_next(NULL); | |
1478 set_thread_state(_thread_new); | |
6854
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|
1479 #if INCLUDE_NMT |
6197 | 1480 set_recorder(NULL); |
6854
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|
1481 #endif |
0 | 1482 _terminated = _not_terminated; |
1483 _privileged_stack_top = NULL; | |
1484 _array_for_gc = NULL; | |
1485 _suspend_equivalent = false; | |
1486 _in_deopt_handler = 0; | |
1487 _doing_unsafe_access = false; | |
1488 _stack_guard_state = stack_guard_unused; | |
5747
120820e30baa
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Christian Haeubl <haeubl@ssw.jku.at>
parents:
5111
diff
changeset
|
1489 #ifdef GRAAL |
4993
897b7d18bebc
added RiCompiledMethod.execute and the required VM infrastructure
Lukas Stadler <lukas.stadler@jku.at>
parents:
4981
diff
changeset
|
1490 _graal_alternate_call_target = NULL; |
13089
77fbf02f701c
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Doug Simon <doug.simon@oracle.com>
parents:
13086
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changeset
|
1491 _graal_implicit_exception_pc = NULL; |
13796
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|
1492 if (GraalCounterSize > 0) { |
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|
1493 _graal_counters = NEW_C_HEAP_ARRAY(jlong, GraalCounterSize, mtInternal); |
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|
1494 memset(_graal_counters, 0, sizeof(jlong) * GraalCounterSize); |
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1495 } else { |
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|
1496 _graal_counters = NULL; |
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1497 } |
11893
ec267141f753
more javadoc and output tweaks for dynamic counters
Lukas Stadler <lukas.stadler@jku.at>
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diff
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|
1498 #endif // GRAAL |
12316
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7195622: CheckUnhandledOops has limited usefulness now
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12253
diff
changeset
|
1499 (void)const_cast<oop&>(_exception_oop = NULL); |
0 | 1500 _exception_pc = 0; |
1501 _exception_handler_pc = 0; | |
1903 | 1502 _is_method_handle_return = 0; |
0 | 1503 _jvmti_thread_state= NULL; |
1213
6deeaebad47a
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dcubed
parents:
1166
diff
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|
1504 _should_post_on_exceptions_flag = JNI_FALSE; |
0 | 1505 _jvmti_get_loaded_classes_closure = NULL; |
1506 _interp_only_mode = 0; | |
1507 _special_runtime_exit_condition = _no_async_condition; | |
1508 _pending_async_exception = NULL; | |
1509 _thread_stat = NULL; | |
1510 _thread_stat = new ThreadStatistics(); | |
1511 _blocked_on_compilation = false; | |
1512 _jni_active_critical = 0; | |
1513 _do_not_unlock_if_synchronized = false; | |
1514 _cached_monitor_info = NULL; | |
1515 _parker = Parker::Allocate(this) ; | |
3696
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
1516 _scanned_nmethod = NULL; |
0 | 1517 |
1518 #ifndef PRODUCT | |
1519 _jmp_ring_index = 0; | |
1520 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { | |
1521 record_jump(NULL, NULL, NULL, 0); | |
1522 } | |
1523 #endif /* PRODUCT */ | |
1524 | |
1525 set_thread_profiler(NULL); | |
1526 if (FlatProfiler::is_active()) { | |
1527 // This is where we would decide to either give each thread it's own profiler | |
1528 // or use one global one from FlatProfiler, | |
1529 // or up to some count of the number of profiled threads, etc. | |
1530 ThreadProfiler* pp = new ThreadProfiler(); | |
1531 pp->engage(); | |
1532 set_thread_profiler(pp); | |
1533 } | |
1534 | |
1535 // Setup safepoint state info for this thread | |
1536 ThreadSafepointState::create(this); | |
1537 | |
1538 debug_only(_java_call_counter = 0); | |
1539 | |
1540 // JVMTI PopFrame support | |
1541 _popframe_condition = popframe_inactive; | |
1542 _popframe_preserved_args = NULL; | |
1543 _popframe_preserved_args_size = 0; | |
1544 | |
1545 pd_initialize(); | |
1546 } | |
1547 | |
8001
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1548 #if INCLUDE_ALL_GCS |
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|
1549 SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
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|
1550 DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
8001
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1551 #endif // INCLUDE_ALL_GCS |
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1552 |
4006 | 1553 JavaThread::JavaThread(bool is_attaching_via_jni) : |
342
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1554 Thread() |
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1555 #if INCLUDE_ALL_GCS |
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1556 , _satb_mark_queue(&_satb_mark_queue_set), |
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|
1557 _dirty_card_queue(&_dirty_card_queue_set) |
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1558 #endif // INCLUDE_ALL_GCS |
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|
1559 { |
0 | 1560 initialize(); |
4006 | 1561 if (is_attaching_via_jni) { |
1562 _jni_attach_state = _attaching_via_jni; | |
1563 } else { | |
1564 _jni_attach_state = _not_attaching_via_jni; | |
1565 } | |
8011
06fd03af6ce4
8001384: G1: assert(!is_null(v)) failed: narrow oop value can never be zero
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changeset
|
1566 assert(deferred_card_mark().is_empty(), "Default MemRegion ctor"); |
6197 | 1567 _safepoint_visible = false; |
0 | 1568 } |
1569 | |
1570 bool JavaThread::reguard_stack(address cur_sp) { | |
1571 if (_stack_guard_state != stack_guard_yellow_disabled) { | |
1572 return true; // Stack already guarded or guard pages not needed. | |
1573 } | |
1574 | |
1575 if (register_stack_overflow()) { | |
1576 // For those architectures which have separate register and | |
1577 // memory stacks, we must check the register stack to see if | |
1578 // it has overflowed. | |
1579 return false; | |
1580 } | |
1581 | |
1582 // Java code never executes within the yellow zone: the latter is only | |
1583 // there to provoke an exception during stack banging. If java code | |
1584 // is executing there, either StackShadowPages should be larger, or | |
1585 // some exception code in c1, c2 or the interpreter isn't unwinding | |
1586 // when it should. | |
1587 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); | |
1588 | |
1589 enable_stack_yellow_zone(); | |
1590 return true; | |
1591 } | |
1592 | |
1593 bool JavaThread::reguard_stack(void) { | |
1594 return reguard_stack(os::current_stack_pointer()); | |
1595 } | |
1596 | |
1597 | |
1598 void JavaThread::block_if_vm_exited() { | |
1599 if (_terminated == _vm_exited) { | |
1600 // _vm_exited is set at safepoint, and Threads_lock is never released | |
1601 // we will block here forever | |
1602 Threads_lock->lock_without_safepoint_check(); | |
1603 ShouldNotReachHere(); | |
1604 } | |
1605 } | |
1606 | |
1607 | |
1608 // Remove this ifdef when C1 is ported to the compiler interface. | |
1609 static void compiler_thread_entry(JavaThread* thread, TRAPS); | |
1610 | |
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1611 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
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1612 Thread() |
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1613 #if INCLUDE_ALL_GCS |
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1614 , _satb_mark_queue(&_satb_mark_queue_set), |
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1615 _dirty_card_queue(&_dirty_card_queue_set) |
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1616 #endif // INCLUDE_ALL_GCS |
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1617 { |
0 | 1618 if (TraceThreadEvents) { |
1619 tty->print_cr("creating thread %p", this); | |
1620 } | |
1621 initialize(); | |
4006 | 1622 _jni_attach_state = _not_attaching_via_jni; |
0 | 1623 set_entry_point(entry_point); |
1624 // Create the native thread itself. | |
1625 // %note runtime_23 | |
1626 os::ThreadType thr_type = os::java_thread; | |
1627 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : | |
1628 os::java_thread; | |
1629 os::create_thread(this, thr_type, stack_sz); | |
6197 | 1630 _safepoint_visible = false; |
0 | 1631 // The _osthread may be NULL here because we ran out of memory (too many threads active). |
1632 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller | |
1633 // may hold a lock and all locks must be unlocked before throwing the exception (throwing | |
1634 // the exception consists of creating the exception object & initializing it, initialization | |
1635 // will leave the VM via a JavaCall and then all locks must be unlocked). | |
1636 // | |
1637 // The thread is still suspended when we reach here. Thread must be explicit started | |
1638 // by creator! Furthermore, the thread must also explicitly be added to the Threads list | |
1639 // by calling Threads:add. The reason why this is not done here, is because the thread | |
1640 // object must be fully initialized (take a look at JVM_Start) | |
1641 } | |
1642 | |
1643 JavaThread::~JavaThread() { | |
1644 if (TraceThreadEvents) { | |
1645 tty->print_cr("terminate thread %p", this); | |
1646 } | |
1647 | |
6882
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|
1648 // By now, this thread should already be invisible to safepoint, |
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1649 // and its per-thread recorder also collected. |
6197 | 1650 assert(!is_safepoint_visible(), "wrong state"); |
6882
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1651 #if INCLUDE_NMT |
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1652 assert(get_recorder() == NULL, "Already collected"); |
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|
1653 #endif // INCLUDE_NMT |
6197 | 1654 |
0 | 1655 // JSR166 -- return the parker to the free list |
1656 Parker::Release(_parker); | |
1657 _parker = NULL ; | |
1658 | |
1659 // Free any remaining previous UnrollBlock | |
1660 vframeArray* old_array = vframe_array_last(); | |
1661 | |
1662 if (old_array != NULL) { | |
1663 Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); | |
1664 old_array->set_unroll_block(NULL); | |
1665 delete old_info; | |
1666 delete old_array; | |
1667 } | |
1668 | |
1669 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); | |
1670 if (deferred != NULL) { | |
1671 // This can only happen if thread is destroyed before deoptimization occurs. | |
1672 assert(deferred->length() != 0, "empty array!"); | |
1673 do { | |
1674 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); | |
1675 deferred->remove_at(0); | |
1676 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
1677 delete dlv; | |
1678 } while (deferred->length() != 0); | |
1679 delete deferred; | |
1680 } | |
1681 | |
1682 // All Java related clean up happens in exit | |
1683 ThreadSafepointState::destroy(this); | |
1684 if (_thread_profiler != NULL) delete _thread_profiler; | |
1685 if (_thread_stat != NULL) delete _thread_stat; | |
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Lukas Stadler <lukas.stadler@jku.at>
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|
1686 |
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|
1687 #ifdef GRAAL |
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Lukas Stadler <lukas.stadler@oracle.com>
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|
1688 if (GraalCounterSize > 0) { |
18534
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|
1689 if (graal_counters_include(this)) { |
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Lukas Stadler <lukas.stadler@oracle.com>
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|
1690 for (int i = 0; i < GraalCounterSize; i++) { |
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fix BenchmarkCounters memory leak
Lukas Stadler <lukas.stadler@oracle.com>
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diff
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|
1691 _graal_old_thread_counters[i] += _graal_counters[i]; |
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Lukas Stadler <lukas.stadler@oracle.com>
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|
1692 } |
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Lukas Stadler <lukas.stadler@jku.at>
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|
1693 } |
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Lukas Stadler <lukas.stadler@jku.at>
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|
1694 FREE_C_HEAP_ARRAY(jlong, _graal_counters, mtInternal); |
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Lukas Stadler <lukas.stadler@jku.at>
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|
1695 } |
13796
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Lukas Stadler <lukas.stadler@jku.at>
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|
1696 #endif // GRAAL |
0 | 1697 } |
1698 | |
1699 | |
1700 // The first routine called by a new Java thread | |
1701 void JavaThread::run() { | |
1702 // initialize thread-local alloc buffer related fields | |
1703 this->initialize_tlab(); | |
1704 | |
1705 // used to test validitity of stack trace backs | |
1706 this->record_base_of_stack_pointer(); | |
1707 | |
1708 // Record real stack base and size. | |
1709 this->record_stack_base_and_size(); | |
1710 | |
1711 // Initialize thread local storage; set before calling MutexLocker | |
1712 this->initialize_thread_local_storage(); | |
1713 | |
1714 this->create_stack_guard_pages(); | |
1715 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1716 this->cache_global_variables(); |
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|
1717 |
0 | 1718 // Thread is now sufficient initialized to be handled by the safepoint code as being |
1719 // in the VM. Change thread state from _thread_new to _thread_in_vm | |
1720 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); | |
1721 | |
1722 assert(JavaThread::current() == this, "sanity check"); | |
1723 assert(!Thread::current()->owns_locks(), "sanity check"); | |
1724 | |
1725 DTRACE_THREAD_PROBE(start, this); | |
1726 | |
1727 // This operation might block. We call that after all safepoint checks for a new thread has | |
1728 // been completed. | |
1729 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1730 | |
1731 if (JvmtiExport::should_post_thread_life()) { | |
1732 JvmtiExport::post_thread_start(this); | |
1733 } | |
1734 | |
10405 | 1735 EventThreadStart event; |
1736 if (event.should_commit()) { | |
1737 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1738 event.commit(); | |
1739 } | |
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7115199: Add event tracing hooks and Java Flight Recorder infrastructure
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|
1740 |
0 | 1741 // We call another function to do the rest so we are sure that the stack addresses used |
1742 // from there will be lower than the stack base just computed | |
1743 thread_main_inner(); | |
1744 | |
1745 // Note, thread is no longer valid at this point! | |
1746 } | |
1747 | |
1748 | |
1749 void JavaThread::thread_main_inner() { | |
1750 assert(JavaThread::current() == this, "sanity check"); | |
1751 assert(this->threadObj() != NULL, "just checking"); | |
1752 | |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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|
1753 // Execute thread entry point unless this thread has a pending exception |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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|
1754 // or has been stopped before starting. |
0 | 1755 // Note: Due to JVM_StopThread we can have pending exceptions already! |
2162
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
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|
1756 if (!this->has_pending_exception() && |
ccfcb502af3f
6566340: Restore use of stillborn flag to signify a thread that was stopped before it started
dholmes
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|
1757 !java_lang_Thread::is_stillborn(this->threadObj())) { |
4006 | 1758 { |
1759 ResourceMark rm(this); | |
1760 this->set_native_thread_name(this->get_thread_name()); | |
1761 } | |
0 | 1762 HandleMark hm(this); |
1763 this->entry_point()(this, this); | |
1764 } | |
1765 | |
1766 DTRACE_THREAD_PROBE(stop, this); | |
1767 | |
1768 this->exit(false); | |
1769 delete this; | |
1770 } | |
1771 | |
1772 | |
1773 static void ensure_join(JavaThread* thread) { | |
1774 // We do not need to grap the Threads_lock, since we are operating on ourself. | |
1775 Handle threadObj(thread, thread->threadObj()); | |
1776 assert(threadObj.not_null(), "java thread object must exist"); | |
1777 ObjectLocker lock(threadObj, thread); | |
1778 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1779 thread->clear_pending_exception(); | |
1780 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. | |
1781 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); | |
2162
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|
1782 // Clear the native thread instance - this makes isAlive return false and allows the join() |
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|
1783 // to complete once we've done the notify_all below |
0 | 1784 java_lang_Thread::set_thread(threadObj(), NULL); |
1785 lock.notify_all(thread); | |
1786 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1787 thread->clear_pending_exception(); | |
1788 } | |
1789 | |
441
da9cb4e97a5f
6770608: G1: Mutator thread can flush barrier and satb queues during safepoint
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parents:
383
diff
changeset
|
1790 |
0 | 1791 // For any new cleanup additions, please check to see if they need to be applied to |
1792 // cleanup_failed_attach_current_thread as well. | |
1793 void JavaThread::exit(bool destroy_vm, ExitType exit_type) { | |
1794 assert(this == JavaThread::current(), "thread consistency check"); | |
1795 | |
1796 HandleMark hm(this); | |
1797 Handle uncaught_exception(this, this->pending_exception()); | |
1798 this->clear_pending_exception(); | |
1799 Handle threadObj(this, this->threadObj()); | |
1800 assert(threadObj.not_null(), "Java thread object should be created"); | |
1801 | |
1802 if (get_thread_profiler() != NULL) { | |
1803 get_thread_profiler()->disengage(); | |
1804 ResourceMark rm; | |
1805 get_thread_profiler()->print(get_thread_name()); | |
1806 } | |
1807 | |
1808 | |
1809 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place | |
1810 { | |
1811 EXCEPTION_MARK; | |
1812 | |
1813 CLEAR_PENDING_EXCEPTION; | |
1814 } | |
1815 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This | |
1816 // has to be fixed by a runtime query method | |
1817 if (!destroy_vm || JDK_Version::is_jdk12x_version()) { | |
1818 // JSR-166: change call from from ThreadGroup.uncaughtException to | |
1819 // java.lang.Thread.dispatchUncaughtException | |
1820 if (uncaught_exception.not_null()) { | |
1821 Handle group(this, java_lang_Thread::threadGroup(threadObj())); | |
1822 { | |
1823 EXCEPTION_MARK; | |
1824 // Check if the method Thread.dispatchUncaughtException() exists. If so | |
1825 // call it. Otherwise we have an older library without the JSR-166 changes, | |
1826 // so call ThreadGroup.uncaughtException() | |
1827 KlassHandle recvrKlass(THREAD, threadObj->klass()); | |
1828 CallInfo callinfo; | |
1142 | 1829 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1830 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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|
1831 vmSymbols::dispatchUncaughtException_name(), |
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
1832 vmSymbols::throwable_void_signature(), |
0 | 1833 KlassHandle(), false, false, THREAD); |
1834 CLEAR_PENDING_EXCEPTION; | |
1835 methodHandle method = callinfo.selected_method(); | |
1836 if (method.not_null()) { | |
1837 JavaValue result(T_VOID); | |
1838 JavaCalls::call_virtual(&result, | |
1839 threadObj, thread_klass, | |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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1840 vmSymbols::dispatchUncaughtException_name(), |
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
1841 vmSymbols::throwable_void_signature(), |
0 | 1842 uncaught_exception, |
1843 THREAD); | |
1844 } else { | |
1142 | 1845 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 1846 JavaValue result(T_VOID); |
1847 JavaCalls::call_virtual(&result, | |
1848 group, thread_group, | |
2177
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6990754: Use native memory and reference counting to implement SymbolTable
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|
1849 vmSymbols::uncaughtException_name(), |
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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2162
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|
1850 vmSymbols::thread_throwable_void_signature(), |
0 | 1851 threadObj, // Arg 1 |
1852 uncaught_exception, // Arg 2 | |
1853 THREAD); | |
1854 } | |
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fb539912d338
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2177
diff
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|
1855 if (HAS_PENDING_EXCEPTION) { |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
coleenp
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2177
diff
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|
1856 ResourceMark rm(this); |
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2177
diff
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|
1857 jio_fprintf(defaultStream::error_stream(), |
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
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2177
diff
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|
1858 "\nException: %s thrown from the UncaughtExceptionHandler" |
fb539912d338
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coleenp
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2177
diff
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|
1859 " in thread \"%s\"\n", |
6983 | 1860 pending_exception()->klass()->external_name(), |
2200
fb539912d338
6472925: OutOfMemoryError fails to generate stack trace as it now ought
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2177
diff
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|
1861 get_thread_name()); |
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diff
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|
1862 CLEAR_PENDING_EXCEPTION; |
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|
1863 } |
0 | 1864 } |
1865 } | |
1866 | |
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1867 // Called before the java thread exit since we want to read info |
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|
1868 // from java_lang_Thread object |
10405 | 1869 EventThreadEnd event; |
1870 if (event.should_commit()) { | |
1871 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1872 event.commit(); | |
1873 } | |
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|
1874 |
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|
1875 // Call after last event on thread |
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|
1876 EVENT_THREAD_EXIT(this); |
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|
1877 |
0 | 1878 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
1879 // the execution of the method. If that is not enough, then we don't really care. Thread.stop | |
1880 // is deprecated anyhow. | |
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469216acdb28
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|
1881 if (!is_Compiler_thread()) { |
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|
1882 int count = 3; |
0 | 1883 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { |
1884 EXCEPTION_MARK; | |
1885 JavaValue result(T_VOID); | |
1142 | 1886 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1887 JavaCalls::call_virtual(&result, |
1888 threadObj, thread_klass, | |
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1889 vmSymbols::exit_method_name(), |
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|
1890 vmSymbols::void_method_signature(), |
0 | 1891 THREAD); |
1892 CLEAR_PENDING_EXCEPTION; | |
1893 } | |
1894 } | |
1895 // notify JVMTI | |
1896 if (JvmtiExport::should_post_thread_life()) { | |
1897 JvmtiExport::post_thread_end(this); | |
1898 } | |
1899 | |
1900 // We have notified the agents that we are exiting, before we go on, | |
1901 // we must check for a pending external suspend request and honor it | |
1902 // in order to not surprise the thread that made the suspend request. | |
1903 while (true) { | |
1904 { | |
1905 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1906 if (!is_external_suspend()) { | |
1907 set_terminated(_thread_exiting); | |
1908 ThreadService::current_thread_exiting(this); | |
1909 break; | |
1910 } | |
1911 // Implied else: | |
1912 // Things get a little tricky here. We have a pending external | |
1913 // suspend request, but we are holding the SR_lock so we | |
1914 // can't just self-suspend. So we temporarily drop the lock | |
1915 // and then self-suspend. | |
1916 } | |
1917 | |
1918 ThreadBlockInVM tbivm(this); | |
1919 java_suspend_self(); | |
1920 | |
1921 // We're done with this suspend request, but we have to loop around | |
1922 // and check again. Eventually we will get SR_lock without a pending | |
1923 // external suspend request and will be able to mark ourselves as | |
1924 // exiting. | |
1925 } | |
1926 // no more external suspends are allowed at this point | |
1927 } else { | |
1928 // before_exit() has already posted JVMTI THREAD_END events | |
1929 } | |
1930 | |
1931 // Notify waiters on thread object. This has to be done after exit() is called | |
1932 // on the thread (if the thread is the last thread in a daemon ThreadGroup the | |
1933 // group should have the destroyed bit set before waiters are notified). | |
1934 ensure_join(this); | |
1935 assert(!this->has_pending_exception(), "ensure_join should have cleared"); | |
1936 | |
1937 // 6282335 JNI DetachCurrentThread spec states that all Java monitors | |
1938 // held by this thread must be released. A detach operation must only | |
1939 // get here if there are no Java frames on the stack. Therefore, any | |
1940 // owned monitors at this point MUST be JNI-acquired monitors which are | |
1941 // pre-inflated and in the monitor cache. | |
1942 // | |
1943 // ensure_join() ignores IllegalThreadStateExceptions, and so does this. | |
1944 if (exit_type == jni_detach && JNIDetachReleasesMonitors) { | |
1945 assert(!this->has_last_Java_frame(), "detaching with Java frames?"); | |
1946 ObjectSynchronizer::release_monitors_owned_by_thread(this); | |
1947 assert(!this->has_pending_exception(), "release_monitors should have cleared"); | |
1948 } | |
1949 | |
1950 // These things needs to be done while we are still a Java Thread. Make sure that thread | |
1951 // is in a consistent state, in case GC happens | |
1952 assert(_privileged_stack_top == NULL, "must be NULL when we get here"); | |
1953 | |
1954 if (active_handles() != NULL) { | |
1955 JNIHandleBlock* block = active_handles(); | |
1956 set_active_handles(NULL); | |
1957 JNIHandleBlock::release_block(block); | |
1958 } | |
1959 | |
1960 if (free_handle_block() != NULL) { | |
1961 JNIHandleBlock* block = free_handle_block(); | |
1962 set_free_handle_block(NULL); | |
1963 JNIHandleBlock::release_block(block); | |
1964 } | |
1965 | |
1966 // These have to be removed while this is still a valid thread. | |
1967 remove_stack_guard_pages(); | |
1968 | |
1969 if (UseTLAB) { | |
18929 | 1970 tlab().make_parsable(true); // retire TLAB |
0 | 1971 } |
1972 | |
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1973 if (JvmtiEnv::environments_might_exist()) { |
49
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|
1974 JvmtiExport::cleanup_thread(this); |
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diff
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|
1975 } |
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|
1976 |
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1977 // We must flush any deferred card marks before removing a thread from |
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1978 // the list of active threads. |
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|
1979 Universe::heap()->flush_deferred_store_barrier(this); |
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|
1980 assert(deferred_card_mark().is_empty(), "Should have been flushed"); |
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|
1981 |
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|
1982 #if INCLUDE_ALL_GCS |
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1983 // We must flush the G1-related buffers before removing a thread |
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1984 // from the list of active threads. We must do this after any deferred |
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1985 // card marks have been flushed (above) so that any entries that are |
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1986 // added to the thread's dirty card queue as a result are not lost. |
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1987 if (UseG1GC) { |
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1988 flush_barrier_queues(); |
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1989 } |
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1990 #endif // INCLUDE_ALL_GCS |
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1991 |
0 | 1992 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
1993 Threads::remove(this); | |
1994 } | |
1995 | |
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1996 #if INCLUDE_ALL_GCS |
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1997 // Flush G1-related queues. |
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1998 void JavaThread::flush_barrier_queues() { |
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1999 satb_mark_queue().flush(); |
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2000 dirty_card_queue().flush(); |
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2001 } |
1842
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2002 |
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2003 void JavaThread::initialize_queues() { |
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2004 assert(!SafepointSynchronize::is_at_safepoint(), |
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2005 "we should not be at a safepoint"); |
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2006 |
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2007 ObjPtrQueue& satb_queue = satb_mark_queue(); |
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2008 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
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2009 // The SATB queue should have been constructed with its active |
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2010 // field set to false. |
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2011 assert(!satb_queue.is_active(), "SATB queue should not be active"); |
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2012 assert(satb_queue.is_empty(), "SATB queue should be empty"); |
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2013 // If we are creating the thread during a marking cycle, we should |
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2014 // set the active field of the SATB queue to true. |
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2015 if (satb_queue_set.is_active()) { |
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2016 satb_queue.set_active(true); |
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2017 } |
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2018 |
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2019 DirtyCardQueue& dirty_queue = dirty_card_queue(); |
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2020 // The dirty card queue should have been constructed with its |
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2021 // active field set to true. |
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2022 assert(dirty_queue.is_active(), "dirty card queue should be active"); |
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2023 } |
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2024 #endif // INCLUDE_ALL_GCS |
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2025 |
0 | 2026 void JavaThread::cleanup_failed_attach_current_thread() { |
441
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2027 if (get_thread_profiler() != NULL) { |
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2028 get_thread_profiler()->disengage(); |
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2029 ResourceMark rm; |
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2030 get_thread_profiler()->print(get_thread_name()); |
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2031 } |
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2032 |
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2033 if (active_handles() != NULL) { |
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2034 JNIHandleBlock* block = active_handles(); |
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2035 set_active_handles(NULL); |
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2036 JNIHandleBlock::release_block(block); |
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2037 } |
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2038 |
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2039 if (free_handle_block() != NULL) { |
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2040 JNIHandleBlock* block = free_handle_block(); |
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2041 set_free_handle_block(NULL); |
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2042 JNIHandleBlock::release_block(block); |
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2043 } |
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2044 |
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2045 // These have to be removed while this is still a valid thread. |
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2046 remove_stack_guard_pages(); |
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2047 |
441
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2048 if (UseTLAB) { |
18929 | 2049 tlab().make_parsable(true); // retire TLAB, if any |
441
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2050 } |
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2051 |
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2052 #if INCLUDE_ALL_GCS |
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2053 if (UseG1GC) { |
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2054 flush_barrier_queues(); |
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2055 } |
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2056 #endif // INCLUDE_ALL_GCS |
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2057 |
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2058 Threads::remove(this); |
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2059 delete this; |
0 | 2060 } |
2061 | |
2062 | |
441
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2063 |
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2064 |
0 | 2065 JavaThread* JavaThread::active() { |
2066 Thread* thread = ThreadLocalStorage::thread(); | |
2067 assert(thread != NULL, "just checking"); | |
2068 if (thread->is_Java_thread()) { | |
2069 return (JavaThread*) thread; | |
2070 } else { | |
2071 assert(thread->is_VM_thread(), "this must be a vm thread"); | |
2072 VM_Operation* op = ((VMThread*) thread)->vm_operation(); | |
2073 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); | |
2074 assert(ret->is_Java_thread(), "must be a Java thread"); | |
2075 return ret; | |
2076 } | |
2077 } | |
2078 | |
2079 bool JavaThread::is_lock_owned(address adr) const { | |
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|
2080 if (Thread::is_lock_owned(adr)) return true; |
0 | 2081 |
2082 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2083 if (chunk->contains(adr)) return true; | |
2084 } | |
2085 | |
2086 return false; | |
2087 } | |
2088 | |
2089 | |
2090 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { | |
2091 chunk->set_next(monitor_chunks()); | |
2092 set_monitor_chunks(chunk); | |
2093 } | |
2094 | |
2095 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { | |
2096 guarantee(monitor_chunks() != NULL, "must be non empty"); | |
2097 if (monitor_chunks() == chunk) { | |
2098 set_monitor_chunks(chunk->next()); | |
2099 } else { | |
2100 MonitorChunk* prev = monitor_chunks(); | |
2101 while (prev->next() != chunk) prev = prev->next(); | |
2102 prev->set_next(chunk->next()); | |
2103 } | |
2104 } | |
2105 | |
2106 // JVM support. | |
2107 | |
2108 // Note: this function shouldn't block if it's called in | |
2109 // _thread_in_native_trans state (such as from | |
2110 // check_special_condition_for_native_trans()). | |
2111 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { | |
2112 | |
2113 if (has_last_Java_frame() && has_async_condition()) { | |
2114 // If we are at a polling page safepoint (not a poll return) | |
2115 // then we must defer async exception because live registers | |
2116 // will be clobbered by the exception path. Poll return is | |
2117 // ok because the call we a returning from already collides | |
2118 // with exception handling registers and so there is no issue. | |
2119 // (The exception handling path kills call result registers but | |
2120 // this is ok since the exception kills the result anyway). | |
2121 | |
2122 if (is_at_poll_safepoint()) { | |
2123 // if the code we are returning to has deoptimized we must defer | |
2124 // the exception otherwise live registers get clobbered on the | |
2125 // exception path before deoptimization is able to retrieve them. | |
2126 // | |
2127 RegisterMap map(this, false); | |
2128 frame caller_fr = last_frame().sender(&map); | |
2129 assert(caller_fr.is_compiled_frame(), "what?"); | |
2130 if (caller_fr.is_deoptimized_frame()) { | |
2131 if (TraceExceptions) { | |
2132 ResourceMark rm; | |
2133 tty->print_cr("deferred async exception at compiled safepoint"); | |
2134 } | |
2135 return; | |
2136 } | |
2137 } | |
2138 } | |
2139 | |
2140 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); | |
2141 if (condition == _no_async_condition) { | |
2142 // Conditions have changed since has_special_runtime_exit_condition() | |
2143 // was called: | |
2144 // - if we were here only because of an external suspend request, | |
2145 // then that was taken care of above (or cancelled) so we are done | |
2146 // - if we were here because of another async request, then it has | |
2147 // been cleared between the has_special_runtime_exit_condition() | |
2148 // and now so again we are done | |
2149 return; | |
2150 } | |
2151 | |
2152 // Check for pending async. exception | |
2153 if (_pending_async_exception != NULL) { | |
2154 // Only overwrite an already pending exception, if it is not a threadDeath. | |
1142 | 2155 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2156 |
2157 // We cannot call Exceptions::_throw(...) here because we cannot block | |
2158 set_pending_exception(_pending_async_exception, __FILE__, __LINE__); | |
2159 | |
2160 if (TraceExceptions) { | |
2161 ResourceMark rm; | |
2162 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); | |
2163 if (has_last_Java_frame() ) { | |
2164 frame f = last_frame(); | |
2165 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); | |
2166 } | |
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2167 tty->print_cr(" of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2168 } |
2169 _pending_async_exception = NULL; | |
2170 clear_has_async_exception(); | |
2171 } | |
2172 } | |
2173 | |
2174 if (check_unsafe_error && | |
2175 condition == _async_unsafe_access_error && !has_pending_exception()) { | |
2176 condition = _no_async_condition; // done | |
2177 switch (thread_state()) { | |
2178 case _thread_in_vm: | |
2179 { | |
2180 JavaThread* THREAD = this; | |
2181 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2182 } | |
2183 case _thread_in_native: | |
2184 { | |
2185 ThreadInVMfromNative tiv(this); | |
2186 JavaThread* THREAD = this; | |
2187 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2188 } | |
2189 case _thread_in_Java: | |
2190 { | |
2191 ThreadInVMfromJava tiv(this); | |
2192 JavaThread* THREAD = this; | |
2193 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); | |
2194 } | |
2195 default: | |
2196 ShouldNotReachHere(); | |
2197 } | |
2198 } | |
2199 | |
2200 assert(condition == _no_async_condition || has_pending_exception() || | |
2201 (!check_unsafe_error && condition == _async_unsafe_access_error), | |
2202 "must have handled the async condition, if no exception"); | |
2203 } | |
2204 | |
2205 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { | |
2206 // | |
2207 // Check for pending external suspend. Internal suspend requests do | |
2208 // not use handle_special_runtime_exit_condition(). | |
2209 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2210 // thread is not the current thread. In older versions of jdbx, jdbx | |
2211 // threads could call into the VM with another thread's JNIEnv so we | |
2212 // can be here operating on behalf of a suspended thread (4432884). | |
2213 bool do_self_suspend = is_external_suspend_with_lock(); | |
2214 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { | |
2215 // | |
2216 // Because thread is external suspended the safepoint code will count | |
2217 // thread as at a safepoint. This can be odd because we can be here | |
2218 // as _thread_in_Java which would normally transition to _thread_blocked | |
2219 // at a safepoint. We would like to mark the thread as _thread_blocked | |
2220 // before calling java_suspend_self like all other callers of it but | |
2221 // we must then observe proper safepoint protocol. (We can't leave | |
2222 // _thread_blocked with a safepoint in progress). However we can be | |
2223 // here as _thread_in_native_trans so we can't use a normal transition | |
2224 // constructor/destructor pair because they assert on that type of | |
2225 // transition. We could do something like: | |
2226 // | |
2227 // JavaThreadState state = thread_state(); | |
2228 // set_thread_state(_thread_in_vm); | |
2229 // { | |
2230 // ThreadBlockInVM tbivm(this); | |
2231 // java_suspend_self() | |
2232 // } | |
2233 // set_thread_state(_thread_in_vm_trans); | |
2234 // if (safepoint) block; | |
2235 // set_thread_state(state); | |
2236 // | |
2237 // but that is pretty messy. Instead we just go with the way the | |
2238 // code has worked before and note that this is the only path to | |
2239 // java_suspend_self that doesn't put the thread in _thread_blocked | |
2240 // mode. | |
2241 | |
2242 frame_anchor()->make_walkable(this); | |
2243 java_suspend_self(); | |
2244 | |
2245 // We might be here for reasons in addition to the self-suspend request | |
2246 // so check for other async requests. | |
2247 } | |
2248 | |
2249 if (check_asyncs) { | |
2250 check_and_handle_async_exceptions(); | |
2251 } | |
2252 } | |
2253 | |
2254 void JavaThread::send_thread_stop(oop java_throwable) { | |
2255 assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); | |
2256 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); | |
2257 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
2258 | |
2259 // Do not throw asynchronous exceptions against the compiler thread | |
2260 // (the compiler thread should not be a Java thread -- fix in 1.4.2) | |
15463
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
2261 if (!can_call_java()) return; |
0 | 2262 |
2263 { | |
2264 // Actually throw the Throwable against the target Thread - however | |
2265 // only if there is no thread death exception installed already. | |
1142 | 2266 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2267 // If the topmost frame is a runtime stub, then we are calling into |
2268 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) | |
2269 // must deoptimize the caller before continuing, as the compiled exception handler table | |
2270 // may not be valid | |
2271 if (has_last_Java_frame()) { | |
2272 frame f = last_frame(); | |
2273 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { | |
2274 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2275 RegisterMap reg_map(this, UseBiasedLocking); | |
2276 frame compiled_frame = f.sender(®_map); | |
7428
2d6c433b1f38
8004741: Missing compiled exception handle table entry for multidimensional array allocation
kvn
parents:
7206
diff
changeset
|
2277 if (!StressCompiledExceptionHandlers && compiled_frame.can_be_deoptimized()) { |
0 | 2278 Deoptimization::deoptimize(this, compiled_frame, ®_map); |
2279 } | |
2280 } | |
2281 } | |
2282 | |
2283 // Set async. pending exception in thread. | |
2284 set_pending_async_exception(java_throwable); | |
2285 | |
2286 if (TraceExceptions) { | |
2287 ResourceMark rm; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2288 tty->print_cr("Pending Async. exception installed of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2289 } |
2290 // for AbortVMOnException flag | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2291 NOT_PRODUCT(Exceptions::debug_check_abort(InstanceKlass::cast(_pending_async_exception->klass())->external_name())); |
0 | 2292 } |
2293 } | |
2294 | |
2295 | |
2296 // Interrupt thread so it will wake up from a potential wait() | |
2297 Thread::interrupt(this); | |
2298 } | |
2299 | |
2300 // External suspension mechanism. | |
2301 // | |
2302 // Tell the VM to suspend a thread when ever it knows that it does not hold on | |
2303 // to any VM_locks and it is at a transition | |
2304 // Self-suspension will happen on the transition out of the vm. | |
2305 // Catch "this" coming in from JNIEnv pointers when the thread has been freed | |
2306 // | |
2307 // Guarantees on return: | |
2308 // + Target thread will not execute any new bytecode (that's why we need to | |
2309 // force a safepoint) | |
2310 // + Target thread will not enter any new monitors | |
2311 // | |
2312 void JavaThread::java_suspend() { | |
2313 { MutexLocker mu(Threads_lock); | |
2314 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { | |
2315 return; | |
2316 } | |
2317 } | |
2318 | |
2319 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2320 if (!is_external_suspend()) { | |
2321 // a racing resume has cancelled us; bail out now | |
2322 return; | |
2323 } | |
2324 | |
2325 // suspend is done | |
2326 uint32_t debug_bits = 0; | |
2327 // Warning: is_ext_suspend_completed() may temporarily drop the | |
2328 // SR_lock to allow the thread to reach a stable thread state if | |
2329 // it is currently in a transient thread state. | |
2330 if (is_ext_suspend_completed(false /* !called_by_wait */, | |
2331 SuspendRetryDelay, &debug_bits) ) { | |
2332 return; | |
2333 } | |
2334 } | |
2335 | |
2336 VM_ForceSafepoint vm_suspend; | |
2337 VMThread::execute(&vm_suspend); | |
2338 } | |
2339 | |
2340 // Part II of external suspension. | |
2341 // A JavaThread self suspends when it detects a pending external suspend | |
2342 // request. This is usually on transitions. It is also done in places | |
2343 // where continuing to the next transition would surprise the caller, | |
2344 // e.g., monitor entry. | |
2345 // | |
2346 // Returns the number of times that the thread self-suspended. | |
2347 // | |
2348 // Note: DO NOT call java_suspend_self() when you just want to block current | |
2349 // thread. java_suspend_self() is the second stage of cooperative | |
2350 // suspension for external suspend requests and should only be used | |
2351 // to complete an external suspend request. | |
2352 // | |
2353 int JavaThread::java_suspend_self() { | |
2354 int ret = 0; | |
2355 | |
2356 // we are in the process of exiting so don't suspend | |
2357 if (is_exiting()) { | |
2358 clear_external_suspend(); | |
2359 return ret; | |
2360 } | |
2361 | |
2362 assert(_anchor.walkable() || | |
2363 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), | |
2364 "must have walkable stack"); | |
2365 | |
2366 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2367 | |
979 | 2368 assert(!this->is_ext_suspended(), |
0 | 2369 "a thread trying to self-suspend should not already be suspended"); |
2370 | |
2371 if (this->is_suspend_equivalent()) { | |
2372 // If we are self-suspending as a result of the lifting of a | |
2373 // suspend equivalent condition, then the suspend_equivalent | |
2374 // flag is not cleared until we set the ext_suspended flag so | |
2375 // that wait_for_ext_suspend_completion() returns consistent | |
2376 // results. | |
2377 this->clear_suspend_equivalent(); | |
2378 } | |
2379 | |
2380 // A racing resume may have cancelled us before we grabbed SR_lock | |
2381 // above. Or another external suspend request could be waiting for us | |
2382 // by the time we return from SR_lock()->wait(). The thread | |
2383 // that requested the suspension may already be trying to walk our | |
2384 // stack and if we return now, we can change the stack out from under | |
2385 // it. This would be a "bad thing (TM)" and cause the stack walker | |
2386 // to crash. We stay self-suspended until there are no more pending | |
2387 // external suspend requests. | |
2388 while (is_external_suspend()) { | |
2389 ret++; | |
2390 this->set_ext_suspended(); | |
2391 | |
2392 // _ext_suspended flag is cleared by java_resume() | |
2393 while (is_ext_suspended()) { | |
2394 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); | |
2395 } | |
2396 } | |
2397 | |
2398 return ret; | |
2399 } | |
2400 | |
2401 #ifdef ASSERT | |
2402 // verify the JavaThread has not yet been published in the Threads::list, and | |
2403 // hence doesn't need protection from concurrent access at this stage | |
2404 void JavaThread::verify_not_published() { | |
2405 if (!Threads_lock->owned_by_self()) { | |
2406 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); | |
2407 assert( !Threads::includes(this), | |
2408 "java thread shouldn't have been published yet!"); | |
2409 } | |
2410 else { | |
2411 assert( !Threads::includes(this), | |
2412 "java thread shouldn't have been published yet!"); | |
2413 } | |
2414 } | |
2415 #endif | |
2416 | |
2417 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2418 // progress or when _suspend_flags is non-zero. | |
2419 // Current thread needs to self-suspend if there is a suspend request and/or | |
2420 // block if a safepoint is in progress. | |
2421 // Async exception ISN'T checked. | |
2422 // Note only the ThreadInVMfromNative transition can call this function | |
2423 // directly and when thread state is _thread_in_native_trans | |
2424 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { | |
2425 assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); | |
2426 | |
2427 JavaThread *curJT = JavaThread::current(); | |
2428 bool do_self_suspend = thread->is_external_suspend(); | |
2429 | |
2430 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); | |
2431 | |
2432 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2433 // thread is not the current thread. In older versions of jdbx, jdbx | |
2434 // threads could call into the VM with another thread's JNIEnv so we | |
2435 // can be here operating on behalf of a suspended thread (4432884). | |
2436 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { | |
2437 JavaThreadState state = thread->thread_state(); | |
2438 | |
2439 // We mark this thread_blocked state as a suspend-equivalent so | |
2440 // that a caller to is_ext_suspend_completed() won't be confused. | |
2441 // The suspend-equivalent state is cleared by java_suspend_self(). | |
2442 thread->set_suspend_equivalent(); | |
2443 | |
2444 // If the safepoint code sees the _thread_in_native_trans state, it will | |
2445 // wait until the thread changes to other thread state. There is no | |
2446 // guarantee on how soon we can obtain the SR_lock and complete the | |
2447 // self-suspend request. It would be a bad idea to let safepoint wait for | |
2448 // too long. Temporarily change the state to _thread_blocked to | |
2449 // let the VM thread know that this thread is ready for GC. The problem | |
2450 // of changing thread state is that safepoint could happen just after | |
2451 // java_suspend_self() returns after being resumed, and VM thread will | |
2452 // see the _thread_blocked state. We must check for safepoint | |
2453 // after restoring the state and make sure we won't leave while a safepoint | |
2454 // is in progress. | |
2455 thread->set_thread_state(_thread_blocked); | |
2456 thread->java_suspend_self(); | |
2457 thread->set_thread_state(state); | |
2458 // Make sure new state is seen by VM thread | |
2459 if (os::is_MP()) { | |
2460 if (UseMembar) { | |
2461 // Force a fence between the write above and read below | |
2462 OrderAccess::fence(); | |
2463 } else { | |
2464 // Must use this rather than serialization page in particular on Windows | |
2465 InterfaceSupport::serialize_memory(thread); | |
2466 } | |
2467 } | |
2468 } | |
2469 | |
2470 if (SafepointSynchronize::do_call_back()) { | |
2471 // If we are safepointing, then block the caller which may not be | |
2472 // the same as the target thread (see above). | |
2473 SafepointSynchronize::block(curJT); | |
2474 } | |
2475 | |
2476 if (thread->is_deopt_suspend()) { | |
2477 thread->clear_deopt_suspend(); | |
2478 RegisterMap map(thread, false); | |
2479 frame f = thread->last_frame(); | |
2480 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { | |
2481 f = f.sender(&map); | |
2482 } | |
2483 if (f.id() == thread->must_deopt_id()) { | |
2484 thread->clear_must_deopt_id(); | |
1727
da877bdc9000
6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents:
1689
diff
changeset
|
2485 f.deoptimize(thread); |
0 | 2486 } else { |
2487 fatal("missed deoptimization!"); | |
2488 } | |
2489 } | |
2490 } | |
2491 | |
2492 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2493 // progress or when _suspend_flags is non-zero. | |
2494 // Current thread needs to self-suspend if there is a suspend request and/or | |
2495 // block if a safepoint is in progress. | |
2496 // Also check for pending async exception (not including unsafe access error). | |
2497 // Note only the native==>VM/Java barriers can call this function and when | |
2498 // thread state is _thread_in_native_trans. | |
2499 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { | |
2500 check_safepoint_and_suspend_for_native_trans(thread); | |
2501 | |
2502 if (thread->has_async_exception()) { | |
2503 // We are in _thread_in_native_trans state, don't handle unsafe | |
2504 // access error since that may block. | |
2505 thread->check_and_handle_async_exceptions(false); | |
2506 } | |
2507 } | |
2508 | |
4873
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2509 // This is a variant of the normal |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2510 // 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
|
2511 // 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
|
2512 // 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
|
2513 // 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
|
2514 // 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
|
2515 // exiting the GC_locker. |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2516 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
|
2517 check_special_condition_for_native_trans(thread); |
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 // Finish the transition |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2520 thread->set_thread_state(_thread_in_Java); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2521 |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2522 if (thread->do_critical_native_unlock()) { |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2523 ThreadInVMfromJavaNoAsyncException tiv(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2524 GC_locker::unlock_critical(thread); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2525 thread->clear_critical_native_unlock(); |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2526 } |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2527 } |
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2528 |
0 | 2529 // We need to guarantee the Threads_lock here, since resumes are not |
2530 // allowed during safepoint synchronization | |
2531 // Can only resume from an external suspension | |
2532 void JavaThread::java_resume() { | |
2533 assert_locked_or_safepoint(Threads_lock); | |
2534 | |
2535 // Sanity check: thread is gone, has started exiting or the thread | |
2536 // was not externally suspended. | |
2537 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { | |
2538 return; | |
2539 } | |
2540 | |
2541 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2542 | |
2543 clear_external_suspend(); | |
2544 | |
2545 if (is_ext_suspended()) { | |
2546 clear_ext_suspended(); | |
2547 SR_lock()->notify_all(); | |
2548 } | |
2549 } | |
2550 | |
2551 void JavaThread::create_stack_guard_pages() { | |
2552 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; | |
2553 address low_addr = stack_base() - stack_size(); | |
2554 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2555 | |
2556 int allocate = os::allocate_stack_guard_pages(); | |
2557 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); | |
2558 | |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2559 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
0 | 2560 warning("Attempt to allocate stack guard pages failed."); |
2561 return; | |
2562 } | |
2563 | |
2564 if (os::guard_memory((char *) low_addr, len)) { | |
2565 _stack_guard_state = stack_guard_enabled; | |
2566 } else { | |
2567 warning("Attempt to protect stack guard pages failed."); | |
2568 if (os::uncommit_memory((char *) low_addr, len)) { | |
2569 warning("Attempt to deallocate stack guard pages failed."); | |
2570 } | |
2571 } | |
2572 } | |
2573 | |
2574 void JavaThread::remove_stack_guard_pages() { | |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
2575 assert(Thread::current() == this, "from different thread"); |
0 | 2576 if (_stack_guard_state == stack_guard_unused) return; |
2577 address low_addr = stack_base() - stack_size(); | |
2578 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2579 | |
2580 if (os::allocate_stack_guard_pages()) { | |
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2581 if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
0 | 2582 _stack_guard_state = stack_guard_unused; |
2583 } else { | |
2584 warning("Attempt to deallocate stack guard pages failed."); | |
2585 } | |
2586 } else { | |
2587 if (_stack_guard_state == stack_guard_unused) return; | |
2588 if (os::unguard_memory((char *) low_addr, len)) { | |
2589 _stack_guard_state = stack_guard_unused; | |
2590 } else { | |
2591 warning("Attempt to unprotect stack guard pages failed."); | |
2592 } | |
2593 } | |
2594 } | |
2595 | |
2596 void JavaThread::enable_stack_yellow_zone() { | |
2597 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2598 assert(_stack_guard_state != stack_guard_enabled, "already enabled"); | |
2599 | |
2600 // The base notation is from the stacks point of view, growing downward. | |
2601 // We need to adjust it to work correctly with guard_memory() | |
2602 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2603 | |
2604 guarantee(base < stack_base(),"Error calculating stack yellow zone"); | |
2605 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); | |
2606 | |
2607 if (os::guard_memory((char *) base, stack_yellow_zone_size())) { | |
2608 _stack_guard_state = stack_guard_enabled; | |
2609 } else { | |
2610 warning("Attempt to guard stack yellow zone failed."); | |
2611 } | |
2612 enable_register_stack_guard(); | |
2613 } | |
2614 | |
2615 void JavaThread::disable_stack_yellow_zone() { | |
2616 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2617 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); | |
2618 | |
2619 // Simply return if called for a thread that does not use guard pages. | |
2620 if (_stack_guard_state == stack_guard_unused) return; | |
2621 | |
2622 // The base notation is from the stacks point of view, growing downward. | |
2623 // We need to adjust it to work correctly with guard_memory() | |
2624 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2625 | |
2626 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { | |
2627 _stack_guard_state = stack_guard_yellow_disabled; | |
2628 } else { | |
2629 warning("Attempt to unguard stack yellow zone failed."); | |
2630 } | |
2631 disable_register_stack_guard(); | |
2632 } | |
2633 | |
2634 void JavaThread::enable_stack_red_zone() { | |
2635 // The base notation is from the stacks point of view, growing downward. | |
2636 // We need to adjust it to work correctly with guard_memory() | |
2637 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2638 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2639 | |
2640 guarantee(base < stack_base(),"Error calculating stack red zone"); | |
2641 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); | |
2642 | |
2643 if(!os::guard_memory((char *) base, stack_red_zone_size())) { | |
2644 warning("Attempt to guard stack red zone failed."); | |
2645 } | |
2646 } | |
2647 | |
2648 void JavaThread::disable_stack_red_zone() { | |
2649 // The base notation is from the stacks point of view, growing downward. | |
2650 // We need to adjust it to work correctly with guard_memory() | |
2651 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2652 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2653 if (!os::unguard_memory((char *)base, stack_red_zone_size())) { | |
2654 warning("Attempt to unguard stack red zone failed."); | |
2655 } | |
2656 } | |
2657 | |
2658 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { | |
2659 // ignore is there is no stack | |
2660 if (!has_last_Java_frame()) return; | |
2661 // traverse the stack frames. Starts from top frame. | |
2662 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2663 frame* fr = fst.current(); | |
2664 f(fr, fst.register_map()); | |
2665 } | |
2666 } | |
2667 | |
2668 | |
2669 #ifndef PRODUCT | |
2670 // Deoptimization | |
2671 // Function for testing deoptimization | |
2672 void JavaThread::deoptimize() { | |
2673 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2674 StackFrameStream fst(this, UseBiasedLocking); | |
2675 bool deopt = false; // Dump stack only if a deopt actually happens. | |
2676 bool only_at = strlen(DeoptimizeOnlyAt) > 0; | |
2677 // Iterate over all frames in the thread and deoptimize | |
2678 for(; !fst.is_done(); fst.next()) { | |
2679 if(fst.current()->can_be_deoptimized()) { | |
2680 | |
2681 if (only_at) { | |
2682 // Deoptimize only at particular bcis. DeoptimizeOnlyAt | |
2683 // consists of comma or carriage return separated numbers so | |
2684 // search for the current bci in that string. | |
2685 address pc = fst.current()->pc(); | |
2686 nmethod* nm = (nmethod*) fst.current()->cb(); | |
2687 ScopeDesc* sd = nm->scope_desc_at( pc); | |
2688 char buffer[8]; | |
2689 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); | |
2690 size_t len = strlen(buffer); | |
2691 const char * found = strstr(DeoptimizeOnlyAt, buffer); | |
2692 while (found != NULL) { | |
2693 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && | |
2694 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { | |
2695 // Check that the bci found is bracketed by terminators. | |
2696 break; | |
2697 } | |
2698 found = strstr(found + 1, buffer); | |
2699 } | |
2700 if (!found) { | |
2701 continue; | |
2702 } | |
2703 } | |
2704 | |
2705 if (DebugDeoptimization && !deopt) { | |
2706 deopt = true; // One-time only print before deopt | |
2707 tty->print_cr("[BEFORE Deoptimization]"); | |
2708 trace_frames(); | |
2709 trace_stack(); | |
2710 } | |
2711 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
2712 } | |
2713 } | |
2714 | |
2715 if (DebugDeoptimization && deopt) { | |
2716 tty->print_cr("[AFTER Deoptimization]"); | |
2717 trace_frames(); | |
2718 } | |
2719 } | |
2720 | |
2721 | |
2722 // Make zombies | |
2723 void JavaThread::make_zombies() { | |
2724 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2725 if (fst.current()->can_be_deoptimized()) { | |
2726 // it is a Java nmethod | |
2727 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); | |
2728 nm->make_not_entrant(); | |
2729 } | |
2730 } | |
2731 } | |
2732 #endif // PRODUCT | |
2733 | |
2734 | |
2735 void JavaThread::deoptimized_wrt_marked_nmethods() { | |
2736 if (!has_last_Java_frame()) return; | |
2737 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2738 StackFrameStream fst(this, UseBiasedLocking); | |
2739 for(; !fst.is_done(); fst.next()) { | |
2740 if (fst.current()->should_be_deoptimized()) { | |
2741 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
2742 } | |
2743 } | |
2744 } | |
2745 | |
2746 | |
2747 // GC support | |
2748 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } | |
2749 | |
2750 void JavaThread::gc_epilogue() { | |
2751 frames_do(frame_gc_epilogue); | |
2752 } | |
2753 | |
2754 | |
2755 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } | |
2756 | |
2757 void JavaThread::gc_prologue() { | |
2758 frames_do(frame_gc_prologue); | |
2759 } | |
2760 | |
1119
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diff
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|
2761 // If the caller is a NamedThread, then remember, in the current scope, |
547f81740344
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parents:
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diff
changeset
|
2762 // 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
|
2763 class RememberProcessedThread: public StackObj { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
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1115
diff
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|
2764 NamedThread* _cur_thr; |
547f81740344
6361589: Print out stack trace for target thread of GC crash
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diff
changeset
|
2765 public: |
547f81740344
6361589: Print out stack trace for target thread of GC crash
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diff
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|
2766 RememberProcessedThread(JavaThread* jthr) { |
547f81740344
6361589: Print out stack trace for target thread of GC crash
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diff
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|
2767 Thread* thread = Thread::current(); |
547f81740344
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minqi
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diff
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|
2768 if (thread->is_Named_thread()) { |
547f81740344
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diff
changeset
|
2769 _cur_thr = (NamedThread *)thread; |
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|
2770 _cur_thr->set_processed_thread(jthr); |
547f81740344
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diff
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|
2771 } else { |
547f81740344
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diff
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|
2772 _cur_thr = NULL; |
547f81740344
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|
2773 } |
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|
2774 } |
547f81740344
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|
2775 |
547f81740344
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|
2776 ~RememberProcessedThread() { |
547f81740344
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diff
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|
2777 if (_cur_thr) { |
547f81740344
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diff
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|
2778 _cur_thr->set_processed_thread(NULL); |
547f81740344
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changeset
|
2779 } |
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|
2780 } |
547f81740344
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diff
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|
2781 }; |
0 | 2782 |
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diff
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|
2783 void JavaThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
1166 | 2784 // Verify that the deferred card marks have been flushed. |
2785 assert(deferred_card_mark().is_empty(), "Should be empty during GC"); | |
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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997
diff
changeset
|
2786 |
0 | 2787 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
2788 // since there may be more than one thread using each ThreadProfiler. | |
2789 | |
2790 // Traverse the GCHandles | |
7179
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diff
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|
2791 Thread::oops_do(f, cld_f, cf); |
0 | 2792 |
2793 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2794 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2795 | |
2796 if (has_last_Java_frame()) { | |
1119
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diff
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|
2797 // Record JavaThread to GC thread |
547f81740344
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parents:
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diff
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|
2798 RememberProcessedThread rpt(this); |
0 | 2799 |
2800 // Traverse the privileged stack | |
2801 if (_privileged_stack_top != NULL) { | |
2802 _privileged_stack_top->oops_do(f); | |
2803 } | |
2804 | |
2805 // traverse the registered growable array | |
2806 if (_array_for_gc != NULL) { | |
2807 for (int index = 0; index < _array_for_gc->length(); index++) { | |
2808 f->do_oop(_array_for_gc->adr_at(index)); | |
2809 } | |
2810 } | |
2811 | |
2812 // Traverse the monitor chunks | |
2813 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2814 chunk->oops_do(f); | |
2815 } | |
2816 | |
2817 // Traverse the execution stack | |
2818 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
7179
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stefank
parents:
7177
diff
changeset
|
2819 fst.current()->oops_do(f, cld_f, cf, fst.register_map()); |
0 | 2820 } |
2821 } | |
2822 | |
2823 // callee_target is never live across a gc point so NULL it here should | |
2824 // it still contain a methdOop. | |
2825 | |
2826 set_callee_target(NULL); | |
2827 | |
2828 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); | |
2829 // If we have deferred set_locals there might be oops waiting to be | |
2830 // written | |
2831 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); | |
2832 if (list != NULL) { | |
2833 for (int i = 0; i < list->length(); i++) { | |
2834 list->at(i)->oops_do(f); | |
2835 } | |
2836 } | |
2837 | |
2838 // Traverse instance variables at the end since the GC may be moving things | |
2839 // around using this function | |
2840 f->do_oop((oop*) &_threadObj); | |
2841 f->do_oop((oop*) &_vm_result); | |
2842 f->do_oop((oop*) &_exception_oop); | |
2843 f->do_oop((oop*) &_pending_async_exception); | |
2844 | |
2845 if (jvmti_thread_state() != NULL) { | |
2846 jvmti_thread_state()->oops_do(f); | |
2847 } | |
3696
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2848 |
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2849 if (_scanned_nmethod != NULL && cf != NULL) { |
7212
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2850 // Safepoints can occur when the sweeper is scanning an nmethod so |
291ffc492eb6
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2851 // process it here to make sure it isn't unloaded in the middle of |
291ffc492eb6
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2852 // a scan. |
291ffc492eb6
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2853 cf->do_code_blob(_scanned_nmethod); |
291ffc492eb6
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Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2854 } |
0 | 2855 } |
2856 | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2857 void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2858 Thread::nmethods_do(cf); // (super method is a no-op) |
0 | 2859 |
2860 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2861 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2862 | |
2863 if (has_last_Java_frame()) { | |
2864 // Traverse the execution stack | |
2865 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
989
148e5441d916
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jrose
parents:
844
diff
changeset
|
2866 fst.current()->nmethods_do(cf); |
0 | 2867 } |
2868 } | |
2869 } | |
2870 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2871 void JavaThread::metadata_do(void f(Metadata*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2872 Thread::metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6198
diff
changeset
|
2873 if (has_last_Java_frame()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2874 // 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
|
2875 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
|
2876 fst.current()->metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2877 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6198
diff
changeset
|
2878 } else if (is_Compiler_thread()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2879 // 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
|
2880 CompilerThread* ct = (CompilerThread*)this; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6198
diff
changeset
|
2881 if (ct->env() != NULL) { |
da91efe96a93
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coleenp
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6198
diff
changeset
|
2882 ct->env()->metadata_do(f); |
da91efe96a93
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coleenp
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6198
diff
changeset
|
2883 } |
da91efe96a93
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diff
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|
2884 } |
da91efe96a93
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|
2885 } |
da91efe96a93
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|
2886 |
0 | 2887 // Printing |
2888 const char* _get_thread_state_name(JavaThreadState _thread_state) { | |
2889 switch (_thread_state) { | |
2890 case _thread_uninitialized: return "_thread_uninitialized"; | |
2891 case _thread_new: return "_thread_new"; | |
2892 case _thread_new_trans: return "_thread_new_trans"; | |
2893 case _thread_in_native: return "_thread_in_native"; | |
2894 case _thread_in_native_trans: return "_thread_in_native_trans"; | |
2895 case _thread_in_vm: return "_thread_in_vm"; | |
2896 case _thread_in_vm_trans: return "_thread_in_vm_trans"; | |
2897 case _thread_in_Java: return "_thread_in_Java"; | |
2898 case _thread_in_Java_trans: return "_thread_in_Java_trans"; | |
2899 case _thread_blocked: return "_thread_blocked"; | |
2900 case _thread_blocked_trans: return "_thread_blocked_trans"; | |
2901 default: return "unknown thread state"; | |
2902 } | |
2903 } | |
2904 | |
2905 #ifndef PRODUCT | |
2906 void JavaThread::print_thread_state_on(outputStream *st) const { | |
2907 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); | |
2908 }; | |
2909 void JavaThread::print_thread_state() const { | |
2910 print_thread_state_on(tty); | |
2911 }; | |
2912 #endif // PRODUCT | |
2913 | |
2914 // Called by Threads::print() for VM_PrintThreads operation | |
2915 void JavaThread::print_on(outputStream *st) const { | |
2916 st->print("\"%s\" ", get_thread_name()); | |
2917 oop thread_oop = threadObj(); | |
6766 | 2918 if (thread_oop != NULL) { |
2919 st->print("#" INT64_FORMAT " ", java_lang_Thread::thread_id(thread_oop)); | |
2920 if (java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); | |
2921 st->print("prio=%d ", java_lang_Thread::priority(thread_oop)); | |
2922 } | |
0 | 2923 Thread::print_on(st); |
2924 // 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
|
2925 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
0 | 2926 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
2927 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); | |
2928 } | |
2929 #ifndef PRODUCT | |
2930 print_thread_state_on(st); | |
2931 _safepoint_state->print_on(st); | |
2932 #endif // PRODUCT | |
2933 } | |
2934 | |
2935 // Called by fatal error handler. The difference between this and | |
2936 // JavaThread::print() is that we can't grab lock or allocate memory. | |
2937 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { | |
2938 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); | |
2939 oop thread_obj = threadObj(); | |
2940 if (thread_obj != NULL) { | |
2941 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); | |
2942 } | |
2943 st->print(" ["); | |
2944 st->print("%s", _get_thread_state_name(_thread_state)); | |
2945 if (osthread()) { | |
2946 st->print(", id=%d", osthread()->thread_id()); | |
2947 } | |
2948 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", | |
2949 _stack_base - _stack_size, _stack_base); | |
2950 st->print("]"); | |
2951 return; | |
2952 } | |
2953 | |
2954 // Verification | |
2955 | |
2956 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } | |
2957 | |
2958 void JavaThread::verify() { | |
2959 // Verify oops in the thread. | |
7179
d0aa87f04bd5
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stefank
parents:
7177
diff
changeset
|
2960 oops_do(&VerifyOopClosure::verify_oop, NULL, NULL); |
0 | 2961 |
2962 // Verify the stack frames. | |
2963 frames_do(frame_verify); | |
2964 } | |
2965 | |
2966 // CR 6300358 (sub-CR 2137150) | |
2967 // Most callers of this method assume that it can't return NULL but a | |
2968 // thread may not have a name whilst it is in the process of attaching to | |
2969 // the VM - see CR 6412693, and there are places where a JavaThread can be | |
2970 // seen prior to having it's threadObj set (eg JNI attaching threads and | |
2971 // if vm exit occurs during initialization). These cases can all be accounted | |
2972 // for such that this method never returns NULL. | |
2973 const char* JavaThread::get_thread_name() const { | |
2974 #ifdef ASSERT | |
2975 // early safepoints can hit while current thread does not yet have TLS | |
2976 if (!SafepointSynchronize::is_at_safepoint()) { | |
2977 Thread *cur = Thread::current(); | |
2978 if (!(cur->is_Java_thread() && cur == this)) { | |
2979 // Current JavaThreads are allowed to get their own name without | |
2980 // the Threads_lock. | |
2981 assert_locked_or_safepoint(Threads_lock); | |
2982 } | |
2983 } | |
2984 #endif // ASSERT | |
2985 return get_thread_name_string(); | |
2986 } | |
2987 | |
2988 // Returns a non-NULL representation of this thread's name, or a suitable | |
2989 // descriptive string if there is no set name | |
2990 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { | |
2991 const char* name_str; | |
2992 oop thread_obj = threadObj(); | |
2993 if (thread_obj != NULL) { | |
2994 typeArrayOop name = java_lang_Thread::name(thread_obj); | |
2995 if (name != NULL) { | |
2996 if (buf == NULL) { | |
2997 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2998 } | |
2999 else { | |
3000 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); | |
3001 } | |
3002 } | |
4006 | 3003 else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
0 | 3004 name_str = "<no-name - thread is attaching>"; |
3005 } | |
3006 else { | |
3007 name_str = Thread::name(); | |
3008 } | |
3009 } | |
3010 else { | |
3011 name_str = Thread::name(); | |
3012 } | |
3013 assert(name_str != NULL, "unexpected NULL thread name"); | |
3014 return name_str; | |
3015 } | |
3016 | |
3017 | |
3018 const char* JavaThread::get_threadgroup_name() const { | |
3019 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
3020 oop thread_obj = threadObj(); | |
3021 if (thread_obj != NULL) { | |
3022 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
3023 if (thread_group != NULL) { | |
3024 typeArrayOop name = java_lang_ThreadGroup::name(thread_group); | |
3025 // ThreadGroup.name can be null | |
3026 if (name != NULL) { | |
3027 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
3028 return str; | |
3029 } | |
3030 } | |
3031 } | |
3032 return NULL; | |
3033 } | |
3034 | |
3035 const char* JavaThread::get_parent_name() const { | |
3036 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
3037 oop thread_obj = threadObj(); | |
3038 if (thread_obj != NULL) { | |
3039 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
3040 if (thread_group != NULL) { | |
3041 oop parent = java_lang_ThreadGroup::parent(thread_group); | |
3042 if (parent != NULL) { | |
3043 typeArrayOop name = java_lang_ThreadGroup::name(parent); | |
3044 // ThreadGroup.name can be null | |
3045 if (name != NULL) { | |
3046 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
3047 return str; | |
3048 } | |
3049 } | |
3050 } | |
3051 } | |
3052 return NULL; | |
3053 } | |
3054 | |
3055 ThreadPriority JavaThread::java_priority() const { | |
3056 oop thr_oop = threadObj(); | |
3057 if (thr_oop == NULL) return NormPriority; // Bootstrapping | |
3058 ThreadPriority priority = java_lang_Thread::priority(thr_oop); | |
3059 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
3060 return priority; | |
3061 } | |
3062 | |
3063 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { | |
3064 | |
3065 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
3066 // Link Java Thread object <-> C++ Thread | |
3067 | |
3068 // Get the C++ thread object (an oop) from the JNI handle (a jthread) | |
3069 // and put it into a new Handle. The Handle "thread_oop" can then | |
3070 // be used to pass the C++ thread object to other methods. | |
3071 | |
3072 // Set the Java level thread object (jthread) field of the | |
3073 // new thread (a JavaThread *) to C++ thread object using the | |
3074 // "thread_oop" handle. | |
3075 | |
3076 // Set the thread field (a JavaThread *) of the | |
3077 // oop representing the java_lang_Thread to the new thread (a JavaThread *). | |
3078 | |
3079 Handle thread_oop(Thread::current(), | |
3080 JNIHandles::resolve_non_null(jni_thread)); | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3081 assert(InstanceKlass::cast(thread_oop->klass())->is_linked(), |
0 | 3082 "must be initialized"); |
3083 set_threadObj(thread_oop()); | |
3084 java_lang_Thread::set_thread(thread_oop(), this); | |
3085 | |
3086 if (prio == NoPriority) { | |
3087 prio = java_lang_Thread::priority(thread_oop()); | |
3088 assert(prio != NoPriority, "A valid priority should be present"); | |
3089 } | |
3090 | |
3091 // Push the Java priority down to the native thread; needs Threads_lock | |
3092 Thread::set_priority(this, prio); | |
3093 | |
3094 // Add the new thread to the Threads list and set it in motion. | |
3095 // We must have threads lock in order to call Threads::add. | |
3096 // It is crucial that we do not block before the thread is | |
3097 // added to the Threads list for if a GC happens, then the java_thread oop | |
3098 // will not be visited by GC. | |
3099 Threads::add(this); | |
3100 } | |
3101 | |
3102 oop JavaThread::current_park_blocker() { | |
3103 // Support for JSR-166 locks | |
3104 oop thread_oop = threadObj(); | |
242 | 3105 if (thread_oop != NULL && |
3106 JDK_Version::current().supports_thread_park_blocker()) { | |
0 | 3107 return java_lang_Thread::park_blocker(thread_oop); |
3108 } | |
3109 return NULL; | |
3110 } | |
3111 | |
3112 | |
3113 void JavaThread::print_stack_on(outputStream* st) { | |
3114 if (!has_last_Java_frame()) return; | |
3115 ResourceMark rm; | |
3116 HandleMark hm; | |
3117 | |
3118 RegisterMap reg_map(this); | |
3119 vframe* start_vf = last_java_vframe(®_map); | |
3120 int count = 0; | |
3121 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3122 if (f->is_java_frame()) { | |
3123 javaVFrame* jvf = javaVFrame::cast(f); | |
3124 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); | |
3125 | |
3126 // Print out lock information | |
3127 if (JavaMonitorsInStackTrace) { | |
3128 jvf->print_lock_info_on(st, count); | |
3129 } | |
3130 } else { | |
3131 // Ignore non-Java frames | |
3132 } | |
3133 | |
3134 // Bail-out case for too deep stacks | |
3135 count++; | |
3136 if (MaxJavaStackTraceDepth == count) return; | |
3137 } | |
3138 } | |
3139 | |
3140 | |
3141 // JVMTI PopFrame support | |
3142 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { | |
3143 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); | |
3144 if (in_bytes(size_in_bytes) != 0) { | |
6197 | 3145 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes), mtThread); |
0 | 3146 _popframe_preserved_args_size = in_bytes(size_in_bytes); |
1603
d93949c5bdcc
6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
kvn
parents:
1584
diff
changeset
|
3147 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
0 | 3148 } |
3149 } | |
3150 | |
3151 void* JavaThread::popframe_preserved_args() { | |
3152 return _popframe_preserved_args; | |
3153 } | |
3154 | |
3155 ByteSize JavaThread::popframe_preserved_args_size() { | |
3156 return in_ByteSize(_popframe_preserved_args_size); | |
3157 } | |
3158 | |
3159 WordSize JavaThread::popframe_preserved_args_size_in_words() { | |
3160 int sz = in_bytes(popframe_preserved_args_size()); | |
3161 assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); | |
3162 return in_WordSize(sz / wordSize); | |
3163 } | |
3164 | |
3165 void JavaThread::popframe_free_preserved_args() { | |
3166 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); | |
6197 | 3167 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args, mtThread); |
0 | 3168 _popframe_preserved_args = NULL; |
3169 _popframe_preserved_args_size = 0; | |
3170 } | |
3171 | |
3172 #ifndef PRODUCT | |
3173 | |
3174 void JavaThread::trace_frames() { | |
3175 tty->print_cr("[Describe stack]"); | |
3176 int frame_no = 1; | |
3177 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
3178 tty->print(" %d. ", frame_no++); | |
3179 fst.current()->print_value_on(tty,this); | |
3180 tty->cr(); | |
3181 } | |
3182 } | |
3183 | |
3908
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3184 class PrintAndVerifyOopClosure: public OopClosure { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3185 protected: |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3186 template <class T> inline void do_oop_work(T* p) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3187 oop obj = oopDesc::load_decode_heap_oop(p); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3188 if (obj == NULL) return; |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3189 tty->print(INTPTR_FORMAT ": ", p); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3190 if (obj->is_oop_or_null()) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3191 if (obj->is_objArray()) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3192 tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3193 } else { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3194 obj->print(); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3195 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3196 } else { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3197 tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3198 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3199 tty->cr(); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3200 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3201 public: |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3202 virtual void do_oop(oop* p) { do_oop_work(p); } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3203 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3204 }; |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3205 |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3206 |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3207 static void oops_print(frame* f, const RegisterMap *map) { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3208 PrintAndVerifyOopClosure print; |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3209 f->print_value(); |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3210 f->oops_do(&print, NULL, NULL, (RegisterMap*)map); |
3908
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3211 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3212 |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3213 // 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
|
3214 // 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
|
3215 // where an oop has gone bad since the frame walk is from youngest to |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3216 // oldest. |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3217 void JavaThread::trace_oops() { |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3218 tty->print_cr("[Trace oops]"); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3219 frames_do(oops_print); |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3220 } |
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3221 |
0 | 3222 |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3223 #ifdef ASSERT |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3224 // 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
|
3225 void JavaThread::print_frame_layout(int depth, bool validate_only) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3226 ResourceMark rm; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3227 PRESERVE_EXCEPTION_MARK; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3228 FrameValues values; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3229 int frame_no = 0; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3230 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
|
3231 fst.current()->describe(values, ++frame_no); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3232 if (depth == frame_no) break; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3233 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3234 if (validate_only) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3235 values.validate(); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3236 } else { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3237 tty->print_cr("[Describe stack layout]"); |
4042
b20d64f83668
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
4007
diff
changeset
|
3238 values.print(this); |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3239 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3240 } |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3241 #endif |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3242 |
0 | 3243 void JavaThread::trace_stack_from(vframe* start_vf) { |
3244 ResourceMark rm; | |
3245 int vframe_no = 1; | |
3246 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3247 if (f->is_java_frame()) { | |
3248 javaVFrame::cast(f)->print_activation(vframe_no++); | |
3249 } else { | |
3250 f->print(); | |
3251 } | |
3252 if (vframe_no > StackPrintLimit) { | |
3253 tty->print_cr("...<more frames>..."); | |
3254 return; | |
3255 } | |
3256 } | |
3257 } | |
3258 | |
3259 | |
3260 void JavaThread::trace_stack() { | |
3261 if (!has_last_Java_frame()) return; | |
3262 ResourceMark rm; | |
3263 HandleMark hm; | |
3264 RegisterMap reg_map(this); | |
3265 trace_stack_from(last_java_vframe(®_map)); | |
3266 } | |
3267 | |
3268 | |
3269 #endif // PRODUCT | |
3270 | |
3271 | |
3272 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { | |
3273 assert(reg_map != NULL, "a map must be given"); | |
3274 frame f = last_frame(); | |
3275 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { | |
3276 if (vf->is_java_frame()) return javaVFrame::cast(vf); | |
3277 } | |
3278 return NULL; | |
3279 } | |
3280 | |
3281 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3282 Klass* JavaThread::security_get_caller_class(int depth) { |
0 | 3283 vframeStream vfst(this); |
3284 vfst.security_get_caller_frame(depth); | |
3285 if (!vfst.at_end()) { | |
3286 return vfst.method()->method_holder(); | |
3287 } | |
3288 return NULL; | |
3289 } | |
3290 | |
3291 static void compiler_thread_entry(JavaThread* thread, TRAPS) { | |
3292 assert(thread->is_Compiler_thread(), "must be compiler thread"); | |
3293 CompileBroker::compiler_thread_loop(); | |
3294 } | |
3295 | |
3296 // Create a CompilerThread | |
3297 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) | |
3298 : JavaThread(&compiler_thread_entry) { | |
3299 _env = NULL; | |
3300 _log = NULL; | |
3301 _task = NULL; | |
3302 _queue = queue; | |
3303 _counters = counters; | |
1584 | 3304 _buffer_blob = NULL; |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3305 _scanned_nmethod = NULL; |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3306 _compiler = NULL; |
0 | 3307 |
3308 #ifndef PRODUCT | |
3309 _ideal_graph_printer = NULL; | |
3310 #endif | |
3311 } | |
3312 | |
15463
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3313 #ifdef COMPILERGRAAL |
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3314 bool CompilerThread::can_call_java() const { |
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3315 return _compiler != NULL && _compiler->is_graal(); |
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3316 } |
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3317 #endif |
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3318 |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3319 void CompilerThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3320 JavaThread::oops_do(f, cld_f, cf); |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3321 if (_scanned_nmethod != NULL && cf != NULL) { |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3322 // 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
|
3323 // 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
|
3324 // a scan. |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3325 cf->do_code_blob(_scanned_nmethod); |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3326 } |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3327 } |
0 | 3328 |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3329 |
0 | 3330 // ======= Threads ======== |
3331 | |
3332 // The Threads class links together all active threads, and provides | |
3333 // operations over all threads. It is protected by its own Mutex | |
3334 // lock, which is also used in other contexts to protect thread | |
3335 // operations from having the thread being operated on from exiting | |
3336 // and going away unexpectedly (e.g., safepoint synchronization) | |
3337 | |
3338 JavaThread* Threads::_thread_list = NULL; | |
3339 int Threads::_number_of_threads = 0; | |
3340 int Threads::_number_of_non_daemon_threads = 0; | |
3341 int Threads::_return_code = 0; | |
3342 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
|
3343 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3344 bool Threads::_vm_complete = false; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3345 #endif |
0 | 3346 |
3347 // All JavaThreads | |
3348 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) | |
3349 | |
3350 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system) | |
3351 void Threads::threads_do(ThreadClosure* tc) { | |
3352 assert_locked_or_safepoint(Threads_lock); | |
3353 // ALL_JAVA_THREADS iterates through all JavaThreads | |
3354 ALL_JAVA_THREADS(p) { | |
3355 tc->do_thread(p); | |
3356 } | |
3357 // Someday we could have a table or list of all non-JavaThreads. | |
3358 // For now, just manually iterate through them. | |
3359 tc->do_thread(VMThread::vm_thread()); | |
3360 Universe::heap()->gc_threads_do(tc); | |
323
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3361 WatcherThread *wt = WatcherThread::watcher_thread(); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3362 // 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
|
3363 // 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
|
3364 // 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
|
3365 // 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
|
3366 // way to prevent termination of WatcherThread would be to acquire |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3367 // 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
|
3368 // checking in some cases. |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3369 if (wt != NULL) |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3370 tc->do_thread(wt); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3371 |
0 | 3372 // If CompilerThreads ever become non-JavaThreads, add them here |
3373 } | |
3374 | |
3375 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { | |
3376 | |
242 | 3377 extern void JDK_Version_init(); |
3378 | |
0 | 3379 // Check version |
3380 if (!is_supported_jni_version(args->version)) return JNI_EVERSION; | |
3381 | |
3382 // Initialize the output stream module | |
3383 ostream_init(); | |
3384 | |
3385 // Process java launcher properties. | |
3386 Arguments::process_sun_java_launcher_properties(args); | |
3387 | |
3388 // Initialize the os module before using TLS | |
3389 os::init(); | |
3390 | |
3391 // Initialize system properties. | |
3392 Arguments::init_system_properties(); | |
3393 | |
242 | 3394 // So that JDK version can be used as a discrimintor when parsing arguments |
3395 JDK_Version_init(); | |
3396 | |
1864
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3397 // Update/Initialize System properties after JDK version number is known |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3398 Arguments::init_version_specific_system_properties(); |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3399 |
0 | 3400 // Parse arguments |
3401 jint parse_result = Arguments::parse(args); | |
3402 if (parse_result != JNI_OK) return parse_result; | |
3403 | |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3404 os::init_before_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3405 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3406 jint ergo_result = Arguments::apply_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3407 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
|
3408 |
0 | 3409 if (PauseAtStartup) { |
3410 os::pause(); | |
3411 } | |
3412 | |
4006 | 3413 #ifndef USDT2 |
0 | 3414 HS_DTRACE_PROBE(hotspot, vm__init__begin); |
4006 | 3415 #else /* USDT2 */ |
3416 HOTSPOT_VM_INIT_BEGIN(); | |
3417 #endif /* USDT2 */ | |
0 | 3418 |
3419 // Record VM creation timing statistics | |
3420 TraceVmCreationTime create_vm_timer; | |
3421 create_vm_timer.start(); | |
3422 | |
3423 // Timing (must come after argument parsing) | |
3424 TraceTime timer("Create VM", TraceStartupTime); | |
3425 | |
3426 // Initialize the os module after parsing the args | |
3427 jint os_init_2_result = os::init_2(); | |
3428 if (os_init_2_result != JNI_OK) return os_init_2_result; | |
3429 | |
7177
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3430 jint adjust_after_os_result = Arguments::adjust_after_os(); |
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3431 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
|
3432 |
6197 | 3433 // intialize TLS |
3434 ThreadLocalStorage::init(); | |
3435 | |
3436 // Bootstrap native memory tracking, so it can start recording memory | |
3437 // activities before worker thread is started. This is the first phase | |
3438 // of bootstrapping, VM is currently running in single-thread mode. | |
3439 MemTracker::bootstrap_single_thread(); | |
3440 | |
0 | 3441 // Initialize output stream logging |
3442 ostream_init_log(); | |
3443 | |
3444 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad | |
3445 // Must be before create_vm_init_agents() | |
3446 if (Arguments::init_libraries_at_startup()) { | |
3447 convert_vm_init_libraries_to_agents(); | |
3448 } | |
3449 | |
3450 // Launch -agentlib/-agentpath and converted -Xrun agents | |
3451 if (Arguments::init_agents_at_startup()) { | |
3452 create_vm_init_agents(); | |
3453 } | |
3454 | |
3455 // Initialize Threads state | |
3456 _thread_list = NULL; | |
3457 _number_of_threads = 0; | |
3458 _number_of_non_daemon_threads = 0; | |
3459 | |
3460 // Initialize global data structures and create system classes in heap | |
3461 vm_init_globals(); | |
3462 | |
13796
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3463 #ifdef GRAAL |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3464 if (GraalCounterSize > 0) { |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3465 JavaThread::_graal_old_thread_counters = NEW_C_HEAP_ARRAY(jlong, GraalCounterSize, mtInternal); |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3466 memset(JavaThread::_graal_old_thread_counters, 0, sizeof(jlong) * GraalCounterSize); |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3467 } else { |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3468 JavaThread::_graal_old_thread_counters = NULL; |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3469 } |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3470 #endif // GRAAL |
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3471 |
0 | 3472 // Attach the main thread to this os thread |
3473 JavaThread* main_thread = new JavaThread(); | |
3474 main_thread->set_thread_state(_thread_in_vm); | |
3475 // must do this before set_active_handles and initialize_thread_local_storage | |
3476 // Note: on solaris initialize_thread_local_storage() will (indirectly) | |
3477 // change the stack size recorded here to one based on the java thread | |
3478 // stacksize. This adjusted size is what is used to figure the placement | |
3479 // of the guard pages. | |
3480 main_thread->record_stack_base_and_size(); | |
3481 main_thread->initialize_thread_local_storage(); | |
3482 | |
3483 main_thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
3484 | |
3485 if (!main_thread->set_as_starting_thread()) { | |
3486 vm_shutdown_during_initialization( | |
3487 "Failed necessary internal allocation. Out of swap space"); | |
3488 delete main_thread; | |
3489 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3490 return JNI_ENOMEM; | |
3491 } | |
3492 | |
3493 // Enable guard page *after* os::create_main_thread(), otherwise it would | |
3494 // crash Linux VM, see notes in os_linux.cpp. | |
3495 main_thread->create_stack_guard_pages(); | |
3496 | |
1878 | 3497 // Initialize Java-Level synchronization subsystem |
3498 ObjectMonitor::Initialize() ; | |
0 | 3499 |
6197 | 3500 // Second phase of bootstrapping, VM is about entering multi-thread mode |
3501 MemTracker::bootstrap_multi_thread(); | |
3502 | |
0 | 3503 // Initialize global modules |
3504 jint status = init_globals(); | |
3505 if (status != JNI_OK) { | |
3506 delete main_thread; | |
3507 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3508 return status; | |
3509 } | |
3510 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3511 // Should be done after the heap is fully created |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3512 main_thread->cache_global_variables(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3513 |
0 | 3514 HandleMark hm; |
3515 | |
3516 { MutexLocker mu(Threads_lock); | |
3517 Threads::add(main_thread); | |
3518 } | |
3519 | |
3520 // Any JVMTI raw monitors entered in onload will transition into | |
3521 // real raw monitor. VM is setup enough here for raw monitor enter. | |
3522 JvmtiExport::transition_pending_onload_raw_monitors(); | |
3523 | |
6197 | 3524 // Fully start NMT |
3525 MemTracker::start(); | |
3526 | |
0 | 3527 // Create the VMThread |
3528 { TraceTime timer("Start VMThread", TraceStartupTime); | |
3529 VMThread::create(); | |
3530 Thread* vmthread = VMThread::vm_thread(); | |
3531 | |
3532 if (!os::create_thread(vmthread, os::vm_thread)) | |
3533 vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); | |
3534 | |
3535 // Wait for the VM thread to become ready, and VMThread::run to initialize | |
3536 // Monitors can have spurious returns, must always check another state flag | |
3537 { | |
3538 MutexLocker ml(Notify_lock); | |
3539 os::start_thread(vmthread); | |
3540 while (vmthread->active_handles() == NULL) { | |
3541 Notify_lock->wait(); | |
3542 } | |
3543 } | |
3544 } | |
3545 | |
3546 assert (Universe::is_fully_initialized(), "not initialized"); | |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3547 if (VerifyDuringStartup) { |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9071
diff
changeset
|
3548 // 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
|
3549 VM_Verify verify_op; |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3550 VMThread::execute(&verify_op); |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3551 } |
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3552 |
0 | 3553 EXCEPTION_MARK; |
3554 | |
3555 // At this point, the Universe is initialized, but we have not executed | |
3556 // any byte code. Now is a good time (the only time) to dump out the | |
3557 // internal state of the JVM for sharing. | |
3558 if (DumpSharedSpaces) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3559 MetaspaceShared::preload_and_dump(CHECK_0); |
0 | 3560 ShouldNotReachHere(); |
3561 } | |
3562 | |
3563 // Always call even when there are not JVMTI environments yet, since environments | |
3564 // may be attached late and JVMTI must track phases of VM execution | |
3565 JvmtiExport::enter_start_phase(); | |
3566 | |
3567 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. | |
3568 JvmtiExport::post_vm_start(); | |
3569 | |
3570 { | |
3571 TraceTime timer("Initialize java.lang classes", TraceStartupTime); | |
3572 | |
3573 if (EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3574 create_vm_init_libraries(); | |
3575 } | |
3576 | |
7608 | 3577 initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
0 | 3578 |
3579 // Initialize java_lang.System (needed before creating the thread) | |
7608 | 3580 initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
3581 initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); | |
3582 Handle thread_group = create_initial_thread_group(CHECK_0); | |
3583 Universe::set_main_thread_group(thread_group()); | |
3584 initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); | |
3585 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); | |
3586 main_thread->set_threadObj(thread_object); | |
3587 // Set thread status to running since main thread has | |
3588 // been started and running. | |
3589 java_lang_Thread::set_thread_status(thread_object, | |
3590 java_lang_Thread::RUNNABLE); | |
3591 | |
3592 // The VM creates & returns objects of this class. Make sure it's initialized. | |
3593 initialize_class(vmSymbols::java_lang_Class(), CHECK_0); | |
3594 | |
3595 // The VM preresolves methods to these classes. Make sure that they get initialized | |
3596 initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); | |
3597 initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); | |
3598 call_initializeSystemClass(CHECK_0); | |
3599 | |
3600 // get the Java runtime name after java.lang.System is initialized | |
3601 JDK_Version::set_runtime_name(get_java_runtime_name(THREAD)); | |
3602 JDK_Version::set_runtime_version(get_java_runtime_version(THREAD)); | |
0 | 3603 |
3604 // an instance of OutOfMemory exception has been allocated earlier | |
7608 | 3605 initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
3606 initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); | |
3607 initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); | |
3608 initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); | |
3609 initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); | |
3610 initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); | |
3611 initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); | |
3612 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
|
3613 } |
0 | 3614 |
3615 // See : bugid 4211085. | |
3616 // Background : the static initializer of java.lang.Compiler tries to read | |
3617 // property"java.compiler" and read & write property "java.vm.info". | |
3618 // When a security manager is installed through the command line | |
3619 // option "-Djava.security.manager", the above properties are not | |
3620 // readable and the static initializer for java.lang.Compiler fails | |
3621 // resulting in a NoClassDefFoundError. This can happen in any | |
3622 // user code which calls methods in java.lang.Compiler. | |
3623 // Hack : the hack is to pre-load and initialize this class, so that only | |
3624 // system domains are on the stack when the properties are read. | |
3625 // Currently even the AWT code has calls to methods in java.lang.Compiler. | |
3626 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT. | |
3627 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and | |
3628 // read and write"java.vm.info" in the default policy file. See bugid 4211383 | |
3629 // 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
|
3630 initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
0 | 3631 |
3632 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to | |
3633 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot | |
3634 // compiler does not get loaded through java.lang.Compiler). "java -version" with the | |
3635 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here. | |
3636 // This should also be taken out as soon as 4211383 gets fixed. | |
3637 reset_vm_info_property(CHECK_0); | |
3638 | |
3639 quicken_jni_functions(); | |
3640 | |
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3641 // Must be run after init_ft which initializes ft_enabled |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3642 if (TRACE_INITIALIZE() != JNI_OK) { |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3643 vm_exit_during_initialization("Failed to initialize tracing backend"); |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3644 } |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3645 |
0 | 3646 // Set flag that basic initialization has completed. Used by exceptions and various |
3647 // debug stuff, that does not work until all basic classes have been initialized. | |
3648 set_init_completed(); | |
3649 | |
17979
e204777ac770
8042933: assert(capacity_until_gc >= committed_bytes) failed
ehelin
parents:
17937
diff
changeset
|
3650 Metaspace::post_initialize(); |
e204777ac770
8042933: assert(capacity_until_gc >= committed_bytes) failed
ehelin
parents:
17937
diff
changeset
|
3651 |
4006 | 3652 #ifndef USDT2 |
0 | 3653 HS_DTRACE_PROBE(hotspot, vm__init__end); |
4006 | 3654 #else /* USDT2 */ |
3655 HOTSPOT_VM_INIT_END(); | |
3656 #endif /* USDT2 */ | |
0 | 3657 |
3658 // record VM initialization completion time | |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3659 #if INCLUDE_MANAGEMENT |
0 | 3660 Management::record_vm_init_completed(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3661 #endif // INCLUDE_MANAGEMENT |
0 | 3662 |
3663 // Compute system loader. Note that this has to occur after set_init_completed, since | |
3664 // valid exceptions may be thrown in the process. | |
3665 // Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and | |
3666 // set_init_completed has just been called, causing exceptions not to be shortcut | |
3667 // anymore. We call vm_exit_during_initialization directly instead. | |
3668 SystemDictionary::compute_java_system_loader(THREAD); | |
3669 if (HAS_PENDING_EXCEPTION) { | |
3670 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3671 } | |
3672 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3673 #if INCLUDE_ALL_GCS |
0 | 3674 // Support for ConcurrentMarkSweep. This should be cleaned up |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3675 // 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
|
3676 // once things are properly refactored. XXX YSR |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3677 if (UseConcMarkSweepGC || UseG1GC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3678 if (UseConcMarkSweepGC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3679 ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3680 } else { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3681 ConcurrentMarkThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3682 } |
0 | 3683 if (HAS_PENDING_EXCEPTION) { |
3684 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3685 } | |
3686 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3687 #endif // INCLUDE_ALL_GCS |
0 | 3688 |
3689 // Always call even when there are not JVMTI environments yet, since environments | |
3690 // may be attached late and JVMTI must track phases of VM execution | |
3691 JvmtiExport::enter_live_phase(); | |
3692 | |
3693 // Signal Dispatcher needs to be started before VMInit event is posted | |
3694 os::signal_init(); | |
3695 | |
3696 // Start Attach Listener if +StartAttachListener or it can't be started lazily | |
3697 if (!DisableAttachMechanism) { | |
11139
2e8f19c2feef
7162400: Intermittent java.io.IOException: Bad file number during HotSpotVirtualMachine.executeCommand
allwin
parents:
11136
diff
changeset
|
3698 AttachListener::vm_start(); |
0 | 3699 if (StartAttachListener || AttachListener::init_at_startup()) { |
3700 AttachListener::init(); | |
3701 } | |
3702 } | |
3703 | |
3704 // Launch -Xrun agents | |
3705 // Must be done in the JVMTI live phase so that for backward compatibility the JDWP | |
3706 // back-end can launch with -Xdebug -Xrunjdwp. | |
3707 if (!EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3708 create_vm_init_libraries(); | |
3709 } | |
3710 | |
6002
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3711 // 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
|
3712 JvmtiExport::post_vm_initialized(); |
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3713 |
10405 | 3714 if (TRACE_START() != JNI_OK) { |
3715 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
|
3716 } |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3717 |
3799
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3718 if (CleanChunkPoolAsync) { |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3719 Chunk::start_chunk_pool_cleaner_task(); |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3720 } |
0 | 3721 |
16270
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3722 #ifdef GRAAL |
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3723 status = GraalRuntime::check_arguments(main_thread); |
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3724 if (status != JNI_OK) { |
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3725 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again |
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3726 return status; |
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3727 } |
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3728 #endif |
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3729 |
0 | 3730 // initialize compiler(s) |
16447
ce6696559683
better fix for deadlock in GraalVM under -Xcomp (JBS:GRAAL-48)
Doug Simon <doug.simon@oracle.com>
parents:
16435
diff
changeset
|
3731 #if defined(COMPILER1) || defined(COMPILER2) || defined(SHARK) || defined(COMPILERGRAAL) |
0 | 3732 CompileBroker::compilation_init(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3733 #endif |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3734 |
12163
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3735 if (EnableInvokeDynamic) { |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3736 // 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
|
3737 // 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
|
3738 // signature polymorphic MH intrinsics can be missed |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3739 // (see SystemDictionary::find_method_handle_intrinsic). |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3740 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
|
3741 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
|
3742 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
|
3743 } |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3744 |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3745 #if INCLUDE_MANAGEMENT |
0 | 3746 Management::initialize(THREAD); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3747 #endif // INCLUDE_MANAGEMENT |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3748 |
0 | 3749 if (HAS_PENDING_EXCEPTION) { |
3750 // management agent fails to start possibly due to | |
3751 // configuration problem and is responsible for printing | |
3752 // stack trace if appropriate. Simply exit VM. | |
3753 vm_exit(1); | |
3754 } | |
3755 | |
3756 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); | |
3757 if (MemProfiling) MemProfiler::engage(); | |
3758 StatSampler::engage(); | |
3759 if (CheckJNICalls) JniPeriodicChecker::engage(); | |
3760 | |
3761 BiasedLocking::init(); | |
3762 | |
17780 | 3763 #if INCLUDE_RTM_OPT |
3764 RTMLockingCounters::init(); | |
3765 #endif | |
3766 | |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3767 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
|
3768 call_postVMInitHook(THREAD); |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3769 // 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
|
3770 // exceptions and provide means of diagnosis. |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3771 if (HAS_PENDING_EXCEPTION) { |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3772 CLEAR_PENDING_EXCEPTION; |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3773 } |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3774 } |
0 | 3775 |
6939
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3776 { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3777 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
|
3778 // 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
|
3779 // or by dynamic enrollment. |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3780 WatcherThread::make_startable(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3781 // 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
|
3782 // 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
|
3783 // 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
|
3784 // 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
|
3785 if (PeriodicTask::num_tasks() > 0) { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3786 WatcherThread::start(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3787 } |
0 | 3788 } |
3789 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3790 // Give os specific code one last chance to start |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3791 os::init_3(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3792 |
0 | 3793 create_vm_timer.end(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3794 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3795 _vm_complete = true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3796 #endif |
0 | 3797 return JNI_OK; |
3798 } | |
3799 | |
3800 // type for the Agent_OnLoad and JVM_OnLoad entry points | |
3801 extern "C" { | |
3802 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); | |
3803 } | |
3804 // Find a command line agent library and return its entry point for | |
3805 // -agentlib: -agentpath: -Xrun | |
3806 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. | |
3807 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { | |
3808 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
|
3809 void *library = NULL; |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3810 |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3811 if (!agent->valid()) { |
0 | 3812 char buffer[JVM_MAXPATHLEN]; |
3813 char ebuf[1024]; | |
3814 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
|
3815 const char *msg = "Could not find agent library "; |
0 | 3816 |
12220 | 3817 // 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
|
3818 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
|
3819 library = agent->os_lib(); |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3820 } else if (agent->is_absolute_path()) { |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3821 library = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3822 if (library == NULL) { |
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3823 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
|
3824 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3825 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
|
3826 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3827 // 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
|
3828 vm_exit_during_initialization(buf, NULL); |
6197 | 3829 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3830 } |
3831 } else { | |
3832 // 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
|
3833 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
|
3834 name)) { |
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3835 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
|
3836 } |
0 | 3837 if (library == NULL) { // Try the local directory |
3838 char ns[1] = {0}; | |
6966
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3839 if (os::dll_build_name(buffer, sizeof(buffer), ns, name)) { |
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3840 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
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3841 } |
0 | 3842 if (library == NULL) { |
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3843 const char *sub_msg = " on the library path, with error: "; |
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3844 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3845 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
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3846 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3847 // If we can't find the agent, exit. |
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3848 vm_exit_during_initialization(buf, NULL); |
6197 | 3849 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3850 } |
3851 } | |
3852 } | |
3853 agent->set_os_lib(library); | |
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3854 agent->set_valid(); |
0 | 3855 } |
3856 | |
3857 // Find the OnLoad function. | |
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3858 on_load_entry = |
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3859 CAST_TO_FN_PTR(OnLoadEntry_t, os::find_agent_function(agent, |
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3860 false, |
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|
3861 on_load_symbols, |
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3862 num_symbol_entries)); |
0 | 3863 return on_load_entry; |
3864 } | |
3865 | |
3866 // Find the JVM_OnLoad entry point | |
3867 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { | |
3868 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; | |
3869 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3870 } | |
3871 | |
3872 // Find the Agent_OnLoad entry point | |
3873 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { | |
3874 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; | |
3875 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3876 } | |
3877 | |
3878 // For backwards compatibility with -Xrun | |
3879 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be | |
3880 // treated like -agentpath: | |
3881 // Must be called before agent libraries are created | |
3882 void Threads::convert_vm_init_libraries_to_agents() { | |
3883 AgentLibrary* agent; | |
3884 AgentLibrary* next; | |
3885 | |
3886 for (agent = Arguments::libraries(); agent != NULL; agent = next) { | |
3887 next = agent->next(); // cache the next agent now as this agent may get moved off this list | |
3888 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3889 | |
3890 // If there is an JVM_OnLoad function it will get called later, | |
3891 // otherwise see if there is an Agent_OnLoad | |
3892 if (on_load_entry == NULL) { | |
3893 on_load_entry = lookup_agent_on_load(agent); | |
3894 if (on_load_entry != NULL) { | |
3895 // switch it to the agent list -- so that Agent_OnLoad will be called, | |
3896 // JVM_OnLoad won't be attempted and Agent_OnUnload will | |
3897 Arguments::convert_library_to_agent(agent); | |
3898 } else { | |
3899 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); | |
3900 } | |
3901 } | |
3902 } | |
3903 } | |
3904 | |
3905 // Create agents for -agentlib: -agentpath: and converted -Xrun | |
3906 // Invokes Agent_OnLoad | |
3907 // Called very early -- before JavaThreads exist | |
3908 void Threads::create_vm_init_agents() { | |
3909 extern struct JavaVM_ main_vm; | |
3910 AgentLibrary* agent; | |
3911 | |
3912 JvmtiExport::enter_onload_phase(); | |
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3913 |
0 | 3914 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
3915 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); | |
3916 | |
3917 if (on_load_entry != NULL) { | |
3918 // Invoke the Agent_OnLoad function | |
3919 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3920 if (err != JNI_OK) { | |
3921 vm_exit_during_initialization("agent library failed to init", agent->name()); | |
3922 } | |
3923 } else { | |
3924 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); | |
3925 } | |
3926 } | |
3927 JvmtiExport::enter_primordial_phase(); | |
3928 } | |
3929 | |
3930 extern "C" { | |
3931 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); | |
3932 } | |
3933 | |
3934 void Threads::shutdown_vm_agents() { | |
3935 // Send any Agent_OnUnload notifications | |
3936 const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS; | |
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3937 size_t num_symbol_entries = ARRAY_SIZE(on_unload_symbols); |
0 | 3938 extern struct JavaVM_ main_vm; |
3939 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
3940 | |
3941 // Find the Agent_OnUnload function. | |
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3942 Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t, |
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3943 os::find_agent_function(agent, |
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|
3944 false, |
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|
3945 on_unload_symbols, |
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|
3946 num_symbol_entries)); |
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|
3947 |
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3948 // Invoke the Agent_OnUnload function |
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3949 if (unload_entry != NULL) { |
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3950 JavaThread* thread = JavaThread::current(); |
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3951 ThreadToNativeFromVM ttn(thread); |
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3952 HandleMark hm(thread); |
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3953 (*unload_entry)(&main_vm); |
0 | 3954 } |
3955 } | |
3956 } | |
3957 | |
3958 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries | |
3959 // Invokes JVM_OnLoad | |
3960 void Threads::create_vm_init_libraries() { | |
3961 extern struct JavaVM_ main_vm; | |
3962 AgentLibrary* agent; | |
3963 | |
3964 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { | |
3965 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3966 | |
3967 if (on_load_entry != NULL) { | |
3968 // Invoke the JVM_OnLoad function | |
3969 JavaThread* thread = JavaThread::current(); | |
3970 ThreadToNativeFromVM ttn(thread); | |
3971 HandleMark hm(thread); | |
3972 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3973 if (err != JNI_OK) { | |
3974 vm_exit_during_initialization("-Xrun library failed to init", agent->name()); | |
3975 } | |
3976 } else { | |
3977 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); | |
3978 } | |
3979 } | |
3980 } | |
3981 | |
3982 // Last thread running calls java.lang.Shutdown.shutdown() | |
3983 void JavaThread::invoke_shutdown_hooks() { | |
3984 HandleMark hm(this); | |
3985 | |
3986 // We could get here with a pending exception, if so clear it now. | |
3987 if (this->has_pending_exception()) { | |
3988 this->clear_pending_exception(); | |
3989 } | |
3990 | |
3991 EXCEPTION_MARK; | |
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3992 Klass* k = |
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3993 SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
0 | 3994 THREAD); |
3995 if (k != NULL) { | |
3996 // SystemDictionary::resolve_or_null will return null if there was | |
3997 // an exception. If we cannot load the Shutdown class, just don't | |
3998 // call Shutdown.shutdown() at all. This will mean the shutdown hooks | |
3999 // and finalizers (if runFinalizersOnExit is set) won't be run. | |
4000 // Note that if a shutdown hook was registered or runFinalizersOnExit | |
4001 // was called, the Shutdown class would have already been loaded | |
4002 // (Runtime.addShutdownHook and runFinalizersOnExit will load it). | |
4003 instanceKlassHandle shutdown_klass (THREAD, k); | |
4004 JavaValue result(T_VOID); | |
4005 JavaCalls::call_static(&result, | |
4006 shutdown_klass, | |
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4007 vmSymbols::shutdown_method_name(), |
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4008 vmSymbols::void_method_signature(), |
0 | 4009 THREAD); |
4010 } | |
4011 CLEAR_PENDING_EXCEPTION; | |
4012 } | |
4013 | |
4014 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when | |
4015 // the program falls off the end of main(). Another VM exit path is through | |
4016 // vm_exit() when the program calls System.exit() to return a value or when | |
4017 // there is a serious error in VM. The two shutdown paths are not exactly | |
4018 // the same, but they share Shutdown.shutdown() at Java level and before_exit() | |
4019 // and VM_Exit op at VM level. | |
4020 // | |
4021 // Shutdown sequence: | |
6197 | 4022 // + Shutdown native memory tracking if it is on |
0 | 4023 // + Wait until we are the last non-daemon thread to execute |
4024 // <-- every thing is still working at this moment --> | |
4025 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level | |
4026 // shutdown hooks, run finalizers if finalization-on-exit | |
4027 // + Call before_exit(), prepare for VM exit | |
4028 // > run VM level shutdown hooks (they are registered through JVM_OnExit(), | |
4029 // currently the only user of this mechanism is File.deleteOnExit()) | |
4030 // > stop flat profiler, StatSampler, watcher thread, CMS threads, | |
4031 // post thread end and vm death events to JVMTI, | |
4032 // stop signal thread | |
4033 // + Call JavaThread::exit(), it will: | |
4034 // > release JNI handle blocks, remove stack guard pages | |
4035 // > remove this thread from Threads list | |
4036 // <-- no more Java code from this thread after this point --> | |
4037 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop | |
4038 // the compiler threads at safepoint | |
4039 // <-- do not use anything that could get blocked by Safepoint --> | |
4040 // + Disable tracing at JNI/JVM barriers | |
4041 // + Set _vm_exited flag for threads that are still running native code | |
4042 // + Delete this thread | |
4043 // + Call exit_globals() | |
4044 // > deletes tty | |
4045 // > deletes PerfMemory resources | |
4046 // + Return to caller | |
4047 | |
4048 bool Threads::destroy_vm() { | |
4049 JavaThread* thread = JavaThread::current(); | |
4050 | |
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4051 #ifdef ASSERT |
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4052 _vm_complete = false; |
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|
4053 #endif |
0 | 4054 // Wait until we are the last non-daemon thread to execute |
4055 { MutexLocker nu(Threads_lock); | |
4056 while (Threads::number_of_non_daemon_threads() > 1 ) | |
4057 // This wait should make safepoint checks, wait without a timeout, | |
4058 // and wait as a suspend-equivalent condition. | |
4059 // | |
4060 // Note: If the FlatProfiler is running and this thread is waiting | |
4061 // for another non-daemon thread to finish, then the FlatProfiler | |
4062 // is waiting for the external suspend request on this thread to | |
4063 // complete. wait_for_ext_suspend_completion() will eventually | |
4064 // timeout, but that takes time. Making this wait a suspend- | |
4065 // equivalent condition solves that timeout problem. | |
4066 // | |
4067 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
4068 Mutex::_as_suspend_equivalent_flag); | |
4069 } | |
4070 | |
4071 // Hang forever on exit if we are reporting an error. | |
4072 if (ShowMessageBoxOnError && is_error_reported()) { | |
4073 os::infinite_sleep(); | |
4074 } | |
2302
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|
4075 os::wait_for_keypress_at_exit(); |
0 | 4076 |
4077 if (JDK_Version::is_jdk12x_version()) { | |
4078 // We are the last thread running, so check if finalizers should be run. | |
4079 // For 1.3 or later this is done in thread->invoke_shutdown_hooks() | |
4080 HandleMark rm(thread); | |
4081 Universe::run_finalizers_on_exit(); | |
4082 } else { | |
4083 // run Java level shutdown hooks | |
4084 thread->invoke_shutdown_hooks(); | |
4085 } | |
4086 | |
4087 before_exit(thread); | |
4088 | |
4089 thread->exit(true); | |
4090 | |
4091 // Stop VM thread. | |
4092 { | |
4093 // 4945125 The vm thread comes to a safepoint during exit. | |
4094 // GC vm_operations can get caught at the safepoint, and the | |
4095 // heap is unparseable if they are caught. Grab the Heap_lock | |
4096 // to prevent this. The GC vm_operations will not be able to | |
17992 | 4097 // queue until after the vm thread is dead. After this point, |
4098 // we'll never emerge out of the safepoint before the VM exits. | |
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|
4099 |
0 | 4100 MutexLocker ml(Heap_lock); |
4101 | |
4102 VMThread::wait_for_vm_thread_exit(); | |
4103 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); | |
4104 VMThread::destroy(); | |
4105 } | |
4106 | |
4107 // clean up ideal graph printers | |
4108 #if defined(COMPILER2) && !defined(PRODUCT) | |
4109 IdealGraphPrinter::clean_up(); | |
4110 #endif | |
4111 | |
4112 // Now, all Java threads are gone except daemon threads. Daemon threads | |
4113 // running Java code or in VM are stopped by the Safepoint. However, | |
4114 // daemon threads executing native code are still running. But they | |
4115 // will be stopped at native=>Java/VM barriers. Note that we can't | |
4116 // simply kill or suspend them, as it is inherently deadlock-prone. | |
4117 | |
4118 #ifndef PRODUCT | |
4119 // disable function tracing at JNI/JVM barriers | |
4120 TraceJNICalls = false; | |
4121 TraceJVMCalls = false; | |
4122 TraceRuntimeCalls = false; | |
4123 #endif | |
4124 | |
4125 VM_Exit::set_vm_exited(); | |
4126 | |
4127 notify_vm_shutdown(); | |
4128 | |
4129 delete thread; | |
4130 | |
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|
4131 #ifdef GRAAL |
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|
4132 if (GraalCounterSize > 0) { |
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|
4133 FREE_C_HEAP_ARRAY(jlong, JavaThread::_graal_old_thread_counters, mtInternal); |
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4134 } |
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4135 #endif // GRAAL |
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4136 |
0 | 4137 // exit_globals() will delete tty |
4138 exit_globals(); | |
4139 | |
4140 return true; | |
4141 } | |
4142 | |
4143 | |
4144 jboolean Threads::is_supported_jni_version_including_1_1(jint version) { | |
4145 if (version == JNI_VERSION_1_1) return JNI_TRUE; | |
4146 return is_supported_jni_version(version); | |
4147 } | |
4148 | |
4149 | |
4150 jboolean Threads::is_supported_jni_version(jint version) { | |
4151 if (version == JNI_VERSION_1_2) return JNI_TRUE; | |
4152 if (version == JNI_VERSION_1_4) return JNI_TRUE; | |
4153 if (version == JNI_VERSION_1_6) return JNI_TRUE; | |
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4154 if (version == JNI_VERSION_1_8) return JNI_TRUE; |
0 | 4155 return JNI_FALSE; |
4156 } | |
4157 | |
4158 | |
4159 void Threads::add(JavaThread* p, bool force_daemon) { | |
4160 // The threads lock must be owned at this point | |
4161 assert_locked_or_safepoint(Threads_lock); | |
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4162 |
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4163 // See the comment for this method in thread.hpp for its purpose and |
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4164 // why it is called here. |
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|
4165 p->initialize_queues(); |
0 | 4166 p->set_next(_thread_list); |
4167 _thread_list = p; | |
4168 _number_of_threads++; | |
4169 oop threadObj = p->threadObj(); | |
4170 bool daemon = true; | |
4171 // Bootstrapping problem: threadObj can be null for initial | |
4172 // JavaThread (or for threads attached via JNI) | |
4173 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { | |
4174 _number_of_non_daemon_threads++; | |
4175 daemon = false; | |
4176 } | |
4177 | |
6197 | 4178 p->set_safepoint_visible(true); |
4179 | |
0 | 4180 ThreadService::add_thread(p, daemon); |
4181 | |
4182 // Possible GC point. | |
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4183 Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
0 | 4184 } |
4185 | |
4186 void Threads::remove(JavaThread* p) { | |
4187 // Extra scope needed for Thread_lock, so we can check | |
4188 // that we do not remove thread without safepoint code notice | |
4189 { MutexLocker ml(Threads_lock); | |
4190 | |
4191 assert(includes(p), "p must be present"); | |
4192 | |
4193 JavaThread* current = _thread_list; | |
4194 JavaThread* prev = NULL; | |
4195 | |
4196 while (current != p) { | |
4197 prev = current; | |
4198 current = current->next(); | |
4199 } | |
4200 | |
4201 if (prev) { | |
4202 prev->set_next(current->next()); | |
4203 } else { | |
4204 _thread_list = p->next(); | |
4205 } | |
4206 _number_of_threads--; | |
4207 oop threadObj = p->threadObj(); | |
4208 bool daemon = true; | |
4209 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { | |
4210 _number_of_non_daemon_threads--; | |
4211 daemon = false; | |
4212 | |
4213 // Only one thread left, do a notify on the Threads_lock so a thread waiting | |
4214 // on destroy_vm will wake up. | |
4215 if (number_of_non_daemon_threads() == 1) | |
4216 Threads_lock->notify_all(); | |
4217 } | |
4218 ThreadService::remove_thread(p, daemon); | |
4219 | |
4220 // Make sure that safepoint code disregard this thread. This is needed since | |
4221 // the thread might mess around with locks after this point. This can cause it | |
4222 // to do callbacks into the safepoint code. However, the safepoint code is not aware | |
4223 // of this thread since it is removed from the queue. | |
4224 p->set_terminated_value(); | |
6197 | 4225 |
4226 // Now, this thread is not visible to safepoint | |
4227 p->set_safepoint_visible(false); | |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
4228 // once the thread becomes safepoint invisible, we can not use its per-thread |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
4229 // recorder. And Threads::do_threads() no longer walks this thread, so we have |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
4230 // to release its per-thread recorder here. |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
4231 MemTracker::thread_exiting(p); |
0 | 4232 } // unlock Threads_lock |
4233 | |
4234 // Since Events::log uses a lock, we grab it outside the Threads_lock | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4800
diff
changeset
|
4235 Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
0 | 4236 } |
4237 | |
4238 // Threads_lock must be held when this is called (or must be called during a safepoint) | |
4239 bool Threads::includes(JavaThread* p) { | |
4240 assert(Threads_lock->is_locked(), "sanity check"); | |
4241 ALL_JAVA_THREADS(q) { | |
4242 if (q == p ) { | |
4243 return true; | |
4244 } | |
4245 } | |
4246 return false; | |
4247 } | |
4248 | |
4249 // Operations on the Threads list for GC. These are not explicitly locked, | |
4250 // but the garbage collector must provide a safe context for them to run. | |
4251 // In particular, these things should never be called when the Threads_lock | |
4252 // is held by some other thread. (Note: the Safepoint abstraction also | |
4253 // uses the Threads_lock to gurantee this property. It also makes sure that | |
4254 // all threads gets blocked when exiting or starting). | |
4255 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4256 void Threads::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4257 ALL_JAVA_THREADS(p) { |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4258 p->oops_do(f, cld_f, cf); |
0 | 4259 } |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4260 VMThread::vm_thread()->oops_do(f, cld_f, cf); |
0 | 4261 } |
4262 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4263 void Threads::possibly_parallel_oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4264 // Introduce a mechanism allowing parallel threads to claim threads as |
4265 // root groups. Overhead should be small enough to use all the time, | |
4266 // even in sequential code. | |
4267 SharedHeap* sh = SharedHeap::heap(); | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4268 // Cannot yet substitute active_workers for n_par_threads |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4269 // because of G1CollectedHeap::verify() use of |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4270 // SharedHeap::process_strong_roots(). n_par_threads == 0 will |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4271 // 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
|
4272 // is being used for parallelism elsewhere. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4273 bool is_par = sh->n_par_threads() > 0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4274 assert(!is_par || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4275 (SharedHeap::heap()->n_par_threads() == |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4276 SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
0 | 4277 int cp = SharedHeap::heap()->strong_roots_parity(); |
4278 ALL_JAVA_THREADS(p) { | |
4279 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
|
4280 p->oops_do(f, cld_f, cf); |
0 | 4281 } |
4282 } | |
4283 VMThread* vmt = VMThread::vm_thread(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4284 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
|
4285 vmt->oops_do(f, cld_f, cf); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4286 } |
0 | 4287 } |
4288 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4289 #if INCLUDE_ALL_GCS |
0 | 4290 // Used by ParallelScavenge |
4291 void Threads::create_thread_roots_tasks(GCTaskQueue* q) { | |
4292 ALL_JAVA_THREADS(p) { | |
4293 q->enqueue(new ThreadRootsTask(p)); | |
4294 } | |
4295 q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); | |
4296 } | |
4297 | |
4298 // Used by Parallel Old | |
4299 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { | |
4300 ALL_JAVA_THREADS(p) { | |
4301 q->enqueue(new ThreadRootsMarkingTask(p)); | |
4302 } | |
4303 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); | |
4304 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4305 #endif // INCLUDE_ALL_GCS |
0 | 4306 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4307 void Threads::nmethods_do(CodeBlobClosure* cf) { |
0 | 4308 ALL_JAVA_THREADS(p) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4309 p->nmethods_do(cf); |
0 | 4310 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4311 VMThread::vm_thread()->nmethods_do(cf); |
0 | 4312 } |
4313 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4314 void Threads::metadata_do(void f(Metadata*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4315 ALL_JAVA_THREADS(p) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4316 p->metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4317 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4318 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4319 |
0 | 4320 void Threads::gc_epilogue() { |
4321 ALL_JAVA_THREADS(p) { | |
4322 p->gc_epilogue(); | |
4323 } | |
4324 } | |
4325 | |
4326 void Threads::gc_prologue() { | |
4327 ALL_JAVA_THREADS(p) { | |
4328 p->gc_prologue(); | |
4329 } | |
4330 } | |
4331 | |
4332 void Threads::deoptimized_wrt_marked_nmethods() { | |
4333 ALL_JAVA_THREADS(p) { | |
4334 p->deoptimized_wrt_marked_nmethods(); | |
4335 } | |
4336 } | |
4337 | |
4338 | |
4339 // Get count Java threads that are waiting to enter the specified monitor. | |
4340 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, | |
4341 address monitor, bool doLock) { | |
4342 assert(doLock || SafepointSynchronize::is_at_safepoint(), | |
4343 "must grab Threads_lock or be at safepoint"); | |
4344 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); | |
4345 | |
4346 int i = 0; | |
4347 { | |
4348 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4349 ALL_JAVA_THREADS(p) { | |
15463
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
4350 if (!p->can_call_java()) continue; |
0 | 4351 |
4352 address pending = (address)p->current_pending_monitor(); | |
4353 if (pending == monitor) { // found a match | |
4354 if (i < count) result->append(p); // save the first count matches | |
4355 i++; | |
4356 } | |
4357 } | |
4358 } | |
4359 return result; | |
4360 } | |
4361 | |
4362 | |
4363 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { | |
4364 assert(doLock || | |
4365 Threads_lock->owned_by_self() || | |
4366 SafepointSynchronize::is_at_safepoint(), | |
4367 "must grab Threads_lock or be at safepoint"); | |
4368 | |
4369 // NULL owner means not locked so we can skip the search | |
4370 if (owner == NULL) return NULL; | |
4371 | |
4372 { | |
4373 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4374 ALL_JAVA_THREADS(p) { | |
4375 // first, see if owner is the address of a Java thread | |
4376 if (owner == (address)p) return p; | |
4377 } | |
4378 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4379 // 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
|
4380 // 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
|
4381 // like deadlock detection. |
0 | 4382 if (UseHeavyMonitors) return NULL; |
4383 | |
4384 // | |
4385 // If we didn't find a matching Java thread and we didn't force use of | |
4386 // heavyweight monitors, then the owner is the stack address of the | |
4387 // Lock Word in the owning Java thread's stack. | |
4388 // | |
4389 JavaThread* the_owner = NULL; | |
4390 { | |
4391 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4392 ALL_JAVA_THREADS(q) { | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4393 if (q->is_lock_owned(owner)) { |
0 | 4394 the_owner = q; |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4395 break; |
0 | 4396 } |
4397 } | |
4398 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4399 // cannot assert on lack of success here; see above comment |
0 | 4400 return the_owner; |
4401 } | |
4402 | |
4403 // Threads::print_on() is called at safepoint by VM_PrintThreads operation. | |
4404 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { | |
4405 char buf[32]; | |
18041 | 4406 st->print_raw_cr(os::local_time_string(buf, sizeof(buf))); |
0 | 4407 |
4408 st->print_cr("Full thread dump %s (%s %s):", | |
4409 Abstract_VM_Version::vm_name(), | |
4410 Abstract_VM_Version::vm_release(), | |
4411 Abstract_VM_Version::vm_info_string() | |
4412 ); | |
4413 st->cr(); | |
4414 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4415 #if INCLUDE_ALL_GCS |
0 | 4416 // Dump concurrent locks |
4417 ConcurrentLocksDump concurrent_locks; | |
4418 if (print_concurrent_locks) { | |
4419 concurrent_locks.dump_at_safepoint(); | |
4420 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4421 #endif // INCLUDE_ALL_GCS |
0 | 4422 |
4423 ALL_JAVA_THREADS(p) { | |
4424 ResourceMark rm; | |
4425 p->print_on(st); | |
4426 if (print_stacks) { | |
4427 if (internal_format) { | |
4428 p->trace_stack(); | |
4429 } else { | |
4430 p->print_stack_on(st); | |
4431 } | |
4432 } | |
4433 st->cr(); | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4434 #if INCLUDE_ALL_GCS |
0 | 4435 if (print_concurrent_locks) { |
4436 concurrent_locks.print_locks_on(p, st); | |
4437 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4438 #endif // INCLUDE_ALL_GCS |
0 | 4439 } |
4440 | |
4441 VMThread::vm_thread()->print_on(st); | |
4442 st->cr(); | |
4443 Universe::heap()->print_gc_threads_on(st); | |
4444 WatcherThread* wt = WatcherThread::watcher_thread(); | |
6766 | 4445 if (wt != NULL) { |
4446 wt->print_on(st); | |
4447 st->cr(); | |
4448 } | |
0 | 4449 CompileBroker::print_compiler_threads_on(st); |
4450 st->flush(); | |
4451 } | |
4452 | |
4453 // Threads::print_on_error() is called by fatal error handler. It's possible | |
4454 // that VM is not at safepoint and/or current thread is inside signal handler. | |
4455 // Don't print stack trace, as the stack may not be walkable. Don't allocate | |
4456 // memory (even in resource area), it might deadlock the error handler. | |
4457 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { | |
4458 bool found_current = false; | |
4459 st->print_cr("Java Threads: ( => current thread )"); | |
4460 ALL_JAVA_THREADS(thread) { | |
4461 bool is_current = (current == thread); | |
4462 found_current = found_current || is_current; | |
4463 | |
4464 st->print("%s", is_current ? "=>" : " "); | |
4465 | |
4466 st->print(PTR_FORMAT, thread); | |
4467 st->print(" "); | |
4468 thread->print_on_error(st, buf, buflen); | |
4469 st->cr(); | |
4470 } | |
4471 st->cr(); | |
4472 | |
4473 st->print_cr("Other Threads:"); | |
4474 if (VMThread::vm_thread()) { | |
4475 bool is_current = (current == VMThread::vm_thread()); | |
4476 found_current = found_current || is_current; | |
4477 st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); | |
4478 | |
4479 st->print(PTR_FORMAT, VMThread::vm_thread()); | |
4480 st->print(" "); | |
4481 VMThread::vm_thread()->print_on_error(st, buf, buflen); | |
4482 st->cr(); | |
4483 } | |
4484 WatcherThread* wt = WatcherThread::watcher_thread(); | |
4485 if (wt != NULL) { | |
4486 bool is_current = (current == wt); | |
4487 found_current = found_current || is_current; | |
4488 st->print("%s", is_current ? "=>" : " "); | |
4489 | |
4490 st->print(PTR_FORMAT, wt); | |
4491 st->print(" "); | |
4492 wt->print_on_error(st, buf, buflen); | |
4493 st->cr(); | |
4494 } | |
4495 if (!found_current) { | |
4496 st->cr(); | |
4497 st->print("=>" PTR_FORMAT " (exited) ", current); | |
4498 current->print_on_error(st, buf, buflen); | |
4499 st->cr(); | |
4500 } | |
4501 } | |
4502 | |
1878 | 4503 // Internal SpinLock and Mutex |
4504 // Based on ParkEvent | |
4505 | |
4506 // Ad-hoc mutual exclusion primitives: SpinLock and Mux | |
0 | 4507 // |
1878 | 4508 // We employ SpinLocks _only for low-contention, fixed-length |
4509 // short-duration critical sections where we're concerned | |
4510 // about native mutex_t or HotSpot Mutex:: latency. | |
4511 // The mux construct provides a spin-then-block mutual exclusion | |
4512 // mechanism. | |
4513 // | |
4514 // Testing has shown that contention on the ListLock guarding gFreeList | |
4515 // is common. If we implement ListLock as a simple SpinLock it's common | |
4516 // for the JVM to devolve to yielding with little progress. This is true | |
4517 // despite the fact that the critical sections protected by ListLock are | |
4518 // extremely short. | |
0 | 4519 // |
1878 | 4520 // TODO-FIXME: ListLock should be of type SpinLock. |
4521 // We should make this a 1st-class type, integrated into the lock | |
4522 // hierarchy as leaf-locks. Critically, the SpinLock structure | |
4523 // should have sufficient padding to avoid false-sharing and excessive | |
4524 // cache-coherency traffic. | |
4525 | |
4526 | |
4527 typedef volatile int SpinLockT ; | |
4528 | |
4529 void Thread::SpinAcquire (volatile int * adr, const char * LockName) { | |
4530 if (Atomic::cmpxchg (1, adr, 0) == 0) { | |
4531 return ; // normal fast-path return | |
4532 } | |
4533 | |
4534 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy. | |
4535 TEVENT (SpinAcquire - ctx) ; | |
4536 int ctr = 0 ; | |
4537 int Yields = 0 ; | |
0 | 4538 for (;;) { |
1878 | 4539 while (*adr != 0) { |
4540 ++ctr ; | |
4541 if ((ctr & 0xFFF) == 0 || !os::is_MP()) { | |
4542 if (Yields > 5) { | |
17706
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
13004
diff
changeset
|
4543 os::naked_short_sleep(1); |
1878 | 4544 } else { |
4545 os::NakedYield() ; | |
4546 ++Yields ; | |
4547 } | |
4548 } else { | |
4549 SpinPause() ; | |
0 | 4550 } |
1878 | 4551 } |
4552 if (Atomic::cmpxchg (1, adr, 0) == 0) return ; | |
0 | 4553 } |
4554 } | |
4555 | |
1878 | 4556 void Thread::SpinRelease (volatile int * adr) { |
4557 assert (*adr != 0, "invariant") ; | |
4558 OrderAccess::fence() ; // guarantee at least release consistency. | |
4559 // Roach-motel semantics. | |
4560 // It's safe if subsequent LDs and STs float "up" into the critical section, | |
4561 // but prior LDs and STs within the critical section can't be allowed | |
4562 // to reorder or float past the ST that releases the lock. | |
4563 *adr = 0 ; | |
0 | 4564 } |
4565 | |
1878 | 4566 // muxAcquire and muxRelease: |
4567 // | |
4568 // * muxAcquire and muxRelease support a single-word lock-word construct. | |
4569 // The LSB of the word is set IFF the lock is held. | |
4570 // The remainder of the word points to the head of a singly-linked list | |
4571 // of threads blocked on the lock. | |
4572 // | |
4573 // * The current implementation of muxAcquire-muxRelease uses its own | |
4574 // dedicated Thread._MuxEvent instance. If we're interested in | |
4575 // minimizing the peak number of extant ParkEvent instances then | |
4576 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long | |
4577 // as certain invariants were satisfied. Specifically, care would need | |
4578 // to be taken with regards to consuming unpark() "permits". | |
4579 // A safe rule of thumb is that a thread would never call muxAcquire() | |
4580 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently | |
4581 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could | |
4582 // consume an unpark() permit intended for monitorenter, for instance. | |
4583 // One way around this would be to widen the restricted-range semaphore | |
4584 // implemented in park(). Another alternative would be to provide | |
4585 // multiple instances of the PlatformEvent() for each thread. One | |
4586 // instance would be dedicated to muxAcquire-muxRelease, for instance. | |
4587 // | |
4588 // * Usage: | |
4589 // -- Only as leaf locks | |
4590 // -- for short-term locking only as muxAcquire does not perform | |
4591 // thread state transitions. | |
4592 // | |
4593 // Alternatives: | |
4594 // * We could implement muxAcquire and muxRelease with MCS or CLH locks | |
4595 // but with parking or spin-then-park instead of pure spinning. | |
4596 // * Use Taura-Oyama-Yonenzawa locks. | |
4597 // * It's possible to construct a 1-0 lock if we encode the lockword as | |
4598 // (List,LockByte). Acquire will CAS the full lockword while Release | |
4599 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so | |
4600 // acquiring threads use timers (ParkTimed) to detect and recover from | |
4601 // the stranding window. Thread/Node structures must be aligned on 256-byte | |
4602 // boundaries by using placement-new. | |
4603 // * Augment MCS with advisory back-link fields maintained with CAS(). | |
4604 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. | |
4605 // The validity of the backlinks must be ratified before we trust the value. | |
4606 // If the backlinks are invalid the exiting thread must back-track through the | |
4607 // the forward links, which are always trustworthy. | |
4608 // * Add a successor indication. The LockWord is currently encoded as | |
4609 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable | |
4610 // to provide the usual futile-wakeup optimization. | |
4611 // See RTStt for details. | |
4612 // * Consider schedctl.sc_nopreempt to cover the critical section. | |
4613 // | |
4614 | |
4615 | |
4616 typedef volatile intptr_t MutexT ; // Mux Lock-word | |
4617 enum MuxBits { LOCKBIT = 1 } ; | |
4618 | |
4619 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { | |
4620 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4621 if (w == 0) return ; | |
4622 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4623 return ; | |
4624 } | |
4625 | |
4626 TEVENT (muxAcquire - Contention) ; | |
4627 ParkEvent * const Self = Thread::current()->_MuxEvent ; | |
4628 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; | |
0 | 4629 for (;;) { |
1878 | 4630 int its = (os::is_MP() ? 100 : 0) + 1 ; |
4631 | |
4632 // Optional spin phase: spin-then-park strategy | |
4633 while (--its >= 0) { | |
4634 w = *Lock ; | |
4635 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4636 return ; | |
4637 } | |
4638 } | |
4639 | |
4640 Self->reset() ; | |
4641 Self->OnList = intptr_t(Lock) ; | |
4642 // The following fence() isn't _strictly necessary as the subsequent | |
4643 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4644 OrderAccess::fence(); | |
4645 for (;;) { | |
4646 w = *Lock ; | |
4647 if ((w & LOCKBIT) == 0) { | |
4648 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4649 Self->OnList = 0 ; // hygiene - allows stronger asserts | |
4650 return ; | |
4651 } | |
4652 continue ; // Interference -- *Lock changed -- Just retry | |
0 | 4653 } |
1878 | 4654 assert (w & LOCKBIT, "invariant") ; |
4655 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4656 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; | |
4657 } | |
4658 | |
4659 while (Self->OnList != 0) { | |
4660 Self->park() ; | |
4661 } | |
0 | 4662 } |
4663 } | |
4664 | |
1878 | 4665 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
4666 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4667 if (w == 0) return ; | |
4668 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4669 return ; | |
4670 } | |
4671 | |
4672 TEVENT (muxAcquire - Contention) ; | |
4673 ParkEvent * ReleaseAfter = NULL ; | |
4674 if (ev == NULL) { | |
4675 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; | |
4676 } | |
4677 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; | |
4678 for (;;) { | |
4679 guarantee (ev->OnList == 0, "invariant") ; | |
4680 int its = (os::is_MP() ? 100 : 0) + 1 ; | |
4681 | |
4682 // Optional spin phase: spin-then-park strategy | |
4683 while (--its >= 0) { | |
4684 w = *Lock ; | |
4685 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4686 if (ReleaseAfter != NULL) { | |
4687 ParkEvent::Release (ReleaseAfter) ; | |
4688 } | |
4689 return ; | |
4690 } | |
4691 } | |
4692 | |
4693 ev->reset() ; | |
4694 ev->OnList = intptr_t(Lock) ; | |
4695 // The following fence() isn't _strictly necessary as the subsequent | |
4696 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4697 OrderAccess::fence(); | |
4698 for (;;) { | |
4699 w = *Lock ; | |
4700 if ((w & LOCKBIT) == 0) { | |
4701 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4702 ev->OnList = 0 ; | |
4703 // We call ::Release while holding the outer lock, thus | |
4704 // artificially lengthening the critical section. | |
4705 // Consider deferring the ::Release() until the subsequent unlock(), | |
4706 // after we've dropped the outer lock. | |
4707 if (ReleaseAfter != NULL) { | |
4708 ParkEvent::Release (ReleaseAfter) ; | |
4709 } | |
4710 return ; | |
4711 } | |
4712 continue ; // Interference -- *Lock changed -- Just retry | |
4713 } | |
4714 assert (w & LOCKBIT, "invariant") ; | |
4715 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4716 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; | |
4717 } | |
4718 | |
4719 while (ev->OnList != 0) { | |
4720 ev->park() ; | |
4721 } | |
4722 } | |
4723 } | |
4724 | |
4725 // Release() must extract a successor from the list and then wake that thread. | |
4726 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme | |
4727 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based | |
4728 // Release() would : | |
4729 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. | |
4730 // (B) Extract a successor from the private list "in-hand" | |
4731 // (C) attempt to CAS() the residual back into *Lock over null. | |
4732 // If there were any newly arrived threads and the CAS() would fail. | |
4733 // In that case Release() would detach the RATs, re-merge the list in-hand | |
4734 // with the RATs and repeat as needed. Alternately, Release() might | |
4735 // detach and extract a successor, but then pass the residual list to the wakee. | |
4736 // The wakee would be responsible for reattaching and remerging before it | |
4737 // competed for the lock. | |
4738 // | |
4739 // Both "pop" and DMR are immune from ABA corruption -- there can be | |
4740 // multiple concurrent pushers, but only one popper or detacher. | |
4741 // This implementation pops from the head of the list. This is unfair, | |
4742 // but tends to provide excellent throughput as hot threads remain hot. | |
4743 // (We wake recently run threads first). | |
4744 | |
4745 void Thread::muxRelease (volatile intptr_t * Lock) { | |
4746 for (;;) { | |
4747 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; | |
4748 assert (w & LOCKBIT, "invariant") ; | |
4749 if (w == LOCKBIT) return ; | |
4750 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; | |
4751 assert (List != NULL, "invariant") ; | |
4752 assert (List->OnList == intptr_t(Lock), "invariant") ; | |
4753 ParkEvent * nxt = List->ListNext ; | |
4754 | |
4755 // The following CAS() releases the lock and pops the head element. | |
4756 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { | |
4757 continue ; | |
4758 } | |
4759 List->OnList = 0 ; | |
4760 OrderAccess::fence() ; | |
4761 List->unpark () ; | |
4762 return ; | |
4763 } | |
4764 } | |
4765 | |
4766 | |
0 | 4767 void Threads::verify() { |
4768 ALL_JAVA_THREADS(p) { | |
4769 p->verify(); | |
4770 } | |
4771 VMThread* thread = VMThread::vm_thread(); | |
4772 if (thread != NULL) thread->verify(); | |
4773 } |