Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/thread.cpp @ 17936:968a17f18337
8042786: Proper fix for 8032566
Summary: Check for overflow cases in range checks and collapse it if we can.
Reviewed-by: jrose, iveresov
author | kvn |
---|---|
date | Fri, 16 May 2014 12:05:14 -0700 |
parents | 9c3dc501b5eb |
children | 78bbf4d43a14 |
rev | line source |
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0 | 1 /* |
7951 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/classLoader.hpp" | |
27 #include "classfile/javaClasses.hpp" | |
28 #include "classfile/systemDictionary.hpp" | |
29 #include "classfile/vmSymbols.hpp" | |
30 #include "code/scopeDesc.hpp" | |
31 #include "compiler/compileBroker.hpp" | |
32 #include "interpreter/interpreter.hpp" | |
33 #include "interpreter/linkResolver.hpp" | |
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34 #include "interpreter/oopMapCache.hpp" |
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35 #include "jvmtifiles/jvmtiEnv.hpp" |
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36 #include "memory/gcLocker.inline.hpp" |
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37 #include "memory/metaspaceShared.hpp" |
1972 | 38 #include "memory/oopFactory.hpp" |
39 #include "memory/universe.inline.hpp" | |
40 #include "oops/instanceKlass.hpp" | |
41 #include "oops/objArrayOop.hpp" | |
42 #include "oops/oop.inline.hpp" | |
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43 #include "oops/symbol.hpp" |
1972 | 44 #include "prims/jvm_misc.hpp" |
45 #include "prims/jvmtiExport.hpp" | |
46 #include "prims/jvmtiThreadState.hpp" | |
47 #include "prims/privilegedStack.hpp" | |
48 #include "runtime/arguments.hpp" | |
49 #include "runtime/biasedLocking.hpp" | |
50 #include "runtime/deoptimization.hpp" | |
51 #include "runtime/fprofiler.hpp" | |
52 #include "runtime/frame.inline.hpp" | |
53 #include "runtime/init.hpp" | |
54 #include "runtime/interfaceSupport.hpp" | |
55 #include "runtime/java.hpp" | |
56 #include "runtime/javaCalls.hpp" | |
57 #include "runtime/jniPeriodicChecker.hpp" | |
58 #include "runtime/memprofiler.hpp" | |
59 #include "runtime/mutexLocker.hpp" | |
60 #include "runtime/objectMonitor.hpp" | |
61 #include "runtime/osThread.hpp" | |
62 #include "runtime/safepoint.hpp" | |
63 #include "runtime/sharedRuntime.hpp" | |
64 #include "runtime/statSampler.hpp" | |
65 #include "runtime/stubRoutines.hpp" | |
66 #include "runtime/task.hpp" | |
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67 #include "runtime/thread.inline.hpp" |
1972 | 68 #include "runtime/threadCritical.hpp" |
69 #include "runtime/threadLocalStorage.hpp" | |
70 #include "runtime/vframe.hpp" | |
71 #include "runtime/vframeArray.hpp" | |
72 #include "runtime/vframe_hp.hpp" | |
73 #include "runtime/vmThread.hpp" | |
74 #include "runtime/vm_operations.hpp" | |
75 #include "services/attachListener.hpp" | |
76 #include "services/management.hpp" | |
6197 | 77 #include "services/memTracker.hpp" |
1972 | 78 #include "services/threadService.hpp" |
10405 | 79 #include "trace/tracing.hpp" |
80 #include "trace/traceMacros.hpp" | |
1972 | 81 #include "utilities/defaultStream.hpp" |
82 #include "utilities/dtrace.hpp" | |
83 #include "utilities/events.hpp" | |
84 #include "utilities/preserveException.hpp" | |
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85 #include "utilities/macros.hpp" |
1972 | 86 #ifdef TARGET_OS_FAMILY_linux |
87 # include "os_linux.inline.hpp" | |
88 #endif | |
89 #ifdef TARGET_OS_FAMILY_solaris | |
90 # include "os_solaris.inline.hpp" | |
91 #endif | |
92 #ifdef TARGET_OS_FAMILY_windows | |
93 # include "os_windows.inline.hpp" | |
94 #endif | |
3960 | 95 #ifdef TARGET_OS_FAMILY_bsd |
96 # include "os_bsd.inline.hpp" | |
97 #endif | |
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98 #if INCLUDE_ALL_GCS |
1972 | 99 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" |
100 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
101 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
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102 #endif // INCLUDE_ALL_GCS |
1972 | 103 #ifdef COMPILER1 |
104 #include "c1/c1_Compiler.hpp" | |
105 #endif | |
106 #ifdef COMPILER2 | |
107 #include "opto/c2compiler.hpp" | |
108 #include "opto/idealGraphPrinter.hpp" | |
109 #endif | |
17780 | 110 #if INCLUDE_RTM_OPT |
111 #include "runtime/rtmLocking.hpp" | |
112 #endif | |
0 | 113 |
114 #ifdef DTRACE_ENABLED | |
115 | |
116 // Only bother with this argument setup if dtrace is available | |
117 | |
4006 | 118 #ifndef USDT2 |
0 | 119 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
120 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); | |
121 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, | |
122 intptr_t, intptr_t, bool); | |
123 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, | |
124 intptr_t, intptr_t, bool); | |
125 | |
126 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
127 { \ | |
128 ResourceMark rm(this); \ | |
129 int len = 0; \ | |
130 const char* name = (javathread)->get_thread_name(); \ | |
131 len = strlen(name); \ | |
132 HS_DTRACE_PROBE5(hotspot, thread__##probe, \ | |
133 name, len, \ | |
134 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
135 (javathread)->osthread()->thread_id(), \ | |
136 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
137 } | |
138 | |
4006 | 139 #else /* USDT2 */ |
140 | |
141 #define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START | |
142 #define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP | |
143 | |
144 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
145 { \ | |
146 ResourceMark rm(this); \ | |
147 int len = 0; \ | |
148 const char* name = (javathread)->get_thread_name(); \ | |
149 len = strlen(name); \ | |
150 HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ | |
151 (char *) name, len, \ | |
152 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
153 (uintptr_t) (javathread)->osthread()->thread_id(), \ | |
154 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
155 } | |
156 | |
157 #endif /* USDT2 */ | |
158 | |
0 | 159 #else // ndef DTRACE_ENABLED |
160 | |
161 #define DTRACE_THREAD_PROBE(probe, javathread) | |
162 | |
163 #endif // ndef DTRACE_ENABLED | |
164 | |
6197 | 165 |
0 | 166 // Class hierarchy |
167 // - Thread | |
168 // - VMThread | |
169 // - WatcherThread | |
170 // - ConcurrentMarkSweepThread | |
171 // - JavaThread | |
172 // - CompilerThread | |
173 | |
174 // ======= Thread ======== | |
175 // Support for forcing alignment of thread objects for biased locking | |
6197 | 176 void* Thread::allocate(size_t size, bool throw_excpt, MEMFLAGS flags) { |
0 | 177 if (UseBiasedLocking) { |
178 const int alignment = markOopDesc::biased_lock_alignment; | |
179 size_t aligned_size = size + (alignment - sizeof(intptr_t)); | |
6197 | 180 void* real_malloc_addr = throw_excpt? AllocateHeap(aligned_size, flags, CURRENT_PC) |
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181 : AllocateHeap(aligned_size, flags, CURRENT_PC, |
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182 AllocFailStrategy::RETURN_NULL); |
0 | 183 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); |
184 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= | |
185 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), | |
186 "JavaThread alignment code overflowed allocated storage"); | |
187 if (TraceBiasedLocking) { | |
188 if (aligned_addr != real_malloc_addr) | |
189 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, | |
190 real_malloc_addr, aligned_addr); | |
191 } | |
192 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; | |
193 return aligned_addr; | |
194 } else { | |
6197 | 195 return throw_excpt? AllocateHeap(size, flags, CURRENT_PC) |
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196 : AllocateHeap(size, flags, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
0 | 197 } |
198 } | |
199 | |
200 void Thread::operator delete(void* p) { | |
201 if (UseBiasedLocking) { | |
202 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; | |
6197 | 203 FreeHeap(real_malloc_addr, mtThread); |
0 | 204 } else { |
6197 | 205 FreeHeap(p, mtThread); |
0 | 206 } |
207 } | |
208 | |
209 | |
210 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, | |
211 // JavaThread | |
212 | |
213 | |
214 Thread::Thread() { | |
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215 // stack and get_thread |
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216 set_stack_base(NULL); |
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217 set_stack_size(0); |
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218 set_self_raw_id(0); |
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219 set_lgrp_id(-1); |
0 | 220 |
221 // allocated data structures | |
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222 set_osthread(NULL); |
6197 | 223 set_resource_area(new (mtThread)ResourceArea()); |
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224 DEBUG_ONLY(_current_resource_mark = NULL;) |
6197 | 225 set_handle_area(new (mtThread) HandleArea(NULL)); |
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226 set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(30, true)); |
0 | 227 set_active_handles(NULL); |
228 set_free_handle_block(NULL); | |
229 set_last_handle_mark(NULL); | |
230 | |
231 // This initial value ==> never claimed. | |
232 _oops_do_parity = 0; | |
233 | |
234 // the handle mark links itself to last_handle_mark | |
10135 | 235 new HandleMark(this); |
236 | |
0 | 237 // plain initialization |
238 debug_only(_owned_locks = NULL;) | |
239 debug_only(_allow_allocation_count = 0;) | |
240 NOT_PRODUCT(_allow_safepoint_count = 0;) | |
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241 NOT_PRODUCT(_skip_gcalot = false;) |
0 | 242 _jvmti_env_iteration_count = 0; |
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243 set_allocated_bytes(0); |
0 | 244 _vm_operation_started_count = 0; |
245 _vm_operation_completed_count = 0; | |
246 _current_pending_monitor = NULL; | |
247 _current_pending_monitor_is_from_java = true; | |
248 _current_waiting_monitor = NULL; | |
249 _num_nested_signal = 0; | |
250 omFreeList = NULL ; | |
251 omFreeCount = 0 ; | |
252 omFreeProvision = 32 ; | |
1587 | 253 omInUseList = NULL ; |
254 omInUseCount = 0 ; | |
0 | 255 |
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256 #ifdef ASSERT |
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257 _visited_for_critical_count = false; |
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258 #endif |
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259 |
0 | 260 _SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true); |
261 _suspend_flags = 0; | |
262 | |
263 // thread-specific hashCode stream generator state - Marsaglia shift-xor form | |
264 _hashStateX = os::random() ; | |
265 _hashStateY = 842502087 ; | |
266 _hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ; | |
267 _hashStateW = 273326509 ; | |
268 | |
269 _OnTrap = 0 ; | |
270 _schedctl = NULL ; | |
271 _Stalled = 0 ; | |
272 _TypeTag = 0x2BAD ; | |
273 | |
274 // Many of the following fields are effectively final - immutable | |
275 // Note that nascent threads can't use the Native Monitor-Mutex | |
276 // construct until the _MutexEvent is initialized ... | |
277 // CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents | |
278 // we might instead use a stack of ParkEvents that we could provision on-demand. | |
279 // The stack would act as a cache to avoid calls to ParkEvent::Allocate() | |
280 // and ::Release() | |
281 _ParkEvent = ParkEvent::Allocate (this) ; | |
282 _SleepEvent = ParkEvent::Allocate (this) ; | |
283 _MutexEvent = ParkEvent::Allocate (this) ; | |
284 _MuxEvent = ParkEvent::Allocate (this) ; | |
285 | |
286 #ifdef CHECK_UNHANDLED_OOPS | |
287 if (CheckUnhandledOops) { | |
288 _unhandled_oops = new UnhandledOops(this); | |
289 } | |
290 #endif // CHECK_UNHANDLED_OOPS | |
291 #ifdef ASSERT | |
292 if (UseBiasedLocking) { | |
293 assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed"); | |
294 assert(this == _real_malloc_address || | |
295 this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment), | |
296 "bug in forced alignment of thread objects"); | |
297 } | |
298 #endif /* ASSERT */ | |
299 } | |
300 | |
301 void Thread::initialize_thread_local_storage() { | |
302 // Note: Make sure this method only calls | |
303 // non-blocking operations. Otherwise, it might not work | |
304 // with the thread-startup/safepoint interaction. | |
305 | |
306 // During Java thread startup, safepoint code should allow this | |
307 // method to complete because it may need to allocate memory to | |
308 // store information for the new thread. | |
309 | |
310 // initialize structure dependent on thread local storage | |
311 ThreadLocalStorage::set_thread(this); | |
312 } | |
313 | |
314 void Thread::record_stack_base_and_size() { | |
315 set_stack_base(os::current_stack_base()); | |
316 set_stack_size(os::current_stack_size()); | |
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317 if (is_Java_thread()) { |
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318 ((JavaThread*) this)->set_stack_overflow_limit(); |
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319 } |
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320 // CR 7190089: on Solaris, primordial thread's stack is adjusted |
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321 // in initialize_thread(). Without the adjustment, stack size is |
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322 // incorrect if stack is set to unlimited (ulimit -s unlimited). |
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323 // So far, only Solaris has real implementation of initialize_thread(). |
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324 // |
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325 // set up any platform-specific state. |
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326 os::initialize_thread(this); |
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327 |
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328 #if INCLUDE_NMT |
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329 // record thread's native stack, stack grows downward |
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330 address stack_low_addr = stack_base() - stack_size(); |
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331 MemTracker::record_thread_stack(stack_low_addr, stack_size(), this, |
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332 CURRENT_PC); |
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333 #endif // INCLUDE_NMT |
0 | 334 } |
335 | |
336 | |
337 Thread::~Thread() { | |
338 // Reclaim the objectmonitors from the omFreeList of the moribund thread. | |
339 ObjectSynchronizer::omFlush (this) ; | |
340 | |
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341 EVENT_THREAD_DESTRUCT(this); |
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342 |
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343 // stack_base can be NULL if the thread is never started or exited before |
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344 // record_stack_base_and_size called. Although, we would like to ensure |
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345 // that all started threads do call record_stack_base_and_size(), there is |
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346 // not proper way to enforce that. |
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347 #if INCLUDE_NMT |
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348 if (_stack_base != NULL) { |
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349 address low_stack_addr = stack_base() - stack_size(); |
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350 MemTracker::release_thread_stack(low_stack_addr, stack_size(), this); |
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351 #ifdef ASSERT |
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352 set_stack_base(NULL); |
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353 #endif |
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354 } |
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355 #endif // INCLUDE_NMT |
6197 | 356 |
0 | 357 // deallocate data structures |
358 delete resource_area(); | |
359 // since the handle marks are using the handle area, we have to deallocated the root | |
360 // handle mark before deallocating the thread's handle area, | |
361 assert(last_handle_mark() != NULL, "check we have an element"); | |
10135 | 362 delete last_handle_mark(); |
363 assert(last_handle_mark() == NULL, "check we have reached the end"); | |
0 | 364 |
365 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. | |
366 // We NULL out the fields for good hygiene. | |
367 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; | |
368 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; | |
369 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; | |
370 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; | |
371 | |
372 delete handle_area(); | |
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373 delete metadata_handles(); |
0 | 374 |
375 // osthread() can be NULL, if creation of thread failed. | |
376 if (osthread() != NULL) os::free_thread(osthread()); | |
377 | |
378 delete _SR_lock; | |
379 | |
380 // clear thread local storage if the Thread is deleting itself | |
381 if (this == Thread::current()) { | |
382 ThreadLocalStorage::set_thread(NULL); | |
383 } else { | |
384 // In the case where we're not the current thread, invalidate all the | |
385 // caches in case some code tries to get the current thread or the | |
386 // thread that was destroyed, and gets stale information. | |
387 ThreadLocalStorage::invalidate_all(); | |
388 } | |
389 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) | |
390 } | |
391 | |
392 // NOTE: dummy function for assertion purpose. | |
393 void Thread::run() { | |
394 ShouldNotReachHere(); | |
395 } | |
396 | |
397 #ifdef ASSERT | |
398 // Private method to check for dangling thread pointer | |
399 void check_for_dangling_thread_pointer(Thread *thread) { | |
400 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
401 "possibility of dangling Thread pointer"); | |
402 } | |
403 #endif | |
404 | |
405 | |
406 #ifndef PRODUCT | |
407 // Tracing method for basic thread operations | |
408 void Thread::trace(const char* msg, const Thread* const thread) { | |
409 if (!TraceThreadEvents) return; | |
410 ResourceMark rm; | |
411 ThreadCritical tc; | |
412 const char *name = "non-Java thread"; | |
413 int prio = -1; | |
414 if (thread->is_Java_thread() | |
415 && !thread->is_Compiler_thread()) { | |
416 // The Threads_lock must be held to get information about | |
417 // this thread but may not be in some situations when | |
418 // tracing thread events. | |
419 bool release_Threads_lock = false; | |
420 if (!Threads_lock->owned_by_self()) { | |
421 Threads_lock->lock(); | |
422 release_Threads_lock = true; | |
423 } | |
424 JavaThread* jt = (JavaThread *)thread; | |
425 name = (char *)jt->get_thread_name(); | |
426 oop thread_oop = jt->threadObj(); | |
427 if (thread_oop != NULL) { | |
428 prio = java_lang_Thread::priority(thread_oop); | |
429 } | |
430 if (release_Threads_lock) { | |
431 Threads_lock->unlock(); | |
432 } | |
433 } | |
434 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); | |
435 } | |
436 #endif | |
437 | |
438 | |
439 ThreadPriority Thread::get_priority(const Thread* const thread) { | |
440 trace("get priority", thread); | |
441 ThreadPriority priority; | |
442 // Can return an error! | |
443 (void)os::get_priority(thread, priority); | |
444 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); | |
445 return priority; | |
446 } | |
447 | |
448 void Thread::set_priority(Thread* thread, ThreadPriority priority) { | |
449 trace("set priority", thread); | |
450 debug_only(check_for_dangling_thread_pointer(thread);) | |
451 // Can return an error! | |
452 (void)os::set_priority(thread, priority); | |
453 } | |
454 | |
455 | |
456 void Thread::start(Thread* thread) { | |
457 trace("start", thread); | |
458 // Start is different from resume in that its safety is guaranteed by context or | |
459 // being called from a Java method synchronized on the Thread object. | |
460 if (!DisableStartThread) { | |
461 if (thread->is_Java_thread()) { | |
462 // Initialize the thread state to RUNNABLE before starting this thread. | |
463 // Can not set it after the thread started because we do not know the | |
464 // exact thread state at that time. It could be in MONITOR_WAIT or | |
465 // in SLEEPING or some other state. | |
466 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), | |
467 java_lang_Thread::RUNNABLE); | |
468 } | |
469 os::start_thread(thread); | |
470 } | |
471 } | |
472 | |
473 // Enqueue a VM_Operation to do the job for us - sometime later | |
474 void Thread::send_async_exception(oop java_thread, oop java_throwable) { | |
475 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); | |
476 VMThread::execute(vm_stop); | |
477 } | |
478 | |
479 | |
480 // | |
481 // Check if an external suspend request has completed (or has been | |
482 // cancelled). Returns true if the thread is externally suspended and | |
483 // false otherwise. | |
484 // | |
485 // The bits parameter returns information about the code path through | |
486 // the routine. Useful for debugging: | |
487 // | |
488 // set in is_ext_suspend_completed(): | |
489 // 0x00000001 - routine was entered | |
490 // 0x00000010 - routine return false at end | |
491 // 0x00000100 - thread exited (return false) | |
492 // 0x00000200 - suspend request cancelled (return false) | |
493 // 0x00000400 - thread suspended (return true) | |
494 // 0x00001000 - thread is in a suspend equivalent state (return true) | |
495 // 0x00002000 - thread is native and walkable (return true) | |
496 // 0x00004000 - thread is native_trans and walkable (needed retry) | |
497 // | |
498 // set in wait_for_ext_suspend_completion(): | |
499 // 0x00010000 - routine was entered | |
500 // 0x00020000 - suspend request cancelled before loop (return false) | |
501 // 0x00040000 - thread suspended before loop (return true) | |
502 // 0x00080000 - suspend request cancelled in loop (return false) | |
503 // 0x00100000 - thread suspended in loop (return true) | |
504 // 0x00200000 - suspend not completed during retry loop (return false) | |
505 // | |
506 | |
507 // Helper class for tracing suspend wait debug bits. | |
508 // | |
509 // 0x00000100 indicates that the target thread exited before it could | |
510 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and | |
511 // 0x00080000 each indicate a cancelled suspend request so they don't | |
512 // count as wait failures either. | |
513 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) | |
514 | |
515 class TraceSuspendDebugBits : public StackObj { | |
516 private: | |
517 JavaThread * jt; | |
518 bool is_wait; | |
519 bool called_by_wait; // meaningful when !is_wait | |
520 uint32_t * bits; | |
521 | |
522 public: | |
523 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, | |
524 uint32_t *_bits) { | |
525 jt = _jt; | |
526 is_wait = _is_wait; | |
527 called_by_wait = _called_by_wait; | |
528 bits = _bits; | |
529 } | |
530 | |
531 ~TraceSuspendDebugBits() { | |
532 if (!is_wait) { | |
533 #if 1 | |
534 // By default, don't trace bits for is_ext_suspend_completed() calls. | |
535 // That trace is very chatty. | |
536 return; | |
537 #else | |
538 if (!called_by_wait) { | |
539 // If tracing for is_ext_suspend_completed() is enabled, then only | |
540 // trace calls to it from wait_for_ext_suspend_completion() | |
541 return; | |
542 } | |
543 #endif | |
544 } | |
545 | |
546 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { | |
547 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { | |
548 MutexLocker ml(Threads_lock); // needed for get_thread_name() | |
549 ResourceMark rm; | |
550 | |
551 tty->print_cr( | |
552 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", | |
553 jt->get_thread_name(), *bits); | |
554 | |
555 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); | |
556 } | |
557 } | |
558 } | |
559 }; | |
560 #undef DEBUG_FALSE_BITS | |
561 | |
562 | |
563 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { | |
564 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); | |
565 | |
566 bool did_trans_retry = false; // only do thread_in_native_trans retry once | |
567 bool do_trans_retry; // flag to force the retry | |
568 | |
569 *bits |= 0x00000001; | |
570 | |
571 do { | |
572 do_trans_retry = false; | |
573 | |
574 if (is_exiting()) { | |
575 // Thread is in the process of exiting. This is always checked | |
576 // first to reduce the risk of dereferencing a freed JavaThread. | |
577 *bits |= 0x00000100; | |
578 return false; | |
579 } | |
580 | |
581 if (!is_external_suspend()) { | |
582 // Suspend request is cancelled. This is always checked before | |
583 // is_ext_suspended() to reduce the risk of a rogue resume | |
584 // confusing the thread that made the suspend request. | |
585 *bits |= 0x00000200; | |
586 return false; | |
587 } | |
588 | |
589 if (is_ext_suspended()) { | |
590 // thread is suspended | |
591 *bits |= 0x00000400; | |
592 return true; | |
593 } | |
594 | |
595 // Now that we no longer do hard suspends of threads running | |
596 // native code, the target thread can be changing thread state | |
597 // while we are in this routine: | |
598 // | |
599 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked | |
600 // | |
601 // We save a copy of the thread state as observed at this moment | |
602 // and make our decision about suspend completeness based on the | |
603 // copy. This closes the race where the thread state is seen as | |
604 // _thread_in_native_trans in the if-thread_blocked check, but is | |
605 // seen as _thread_blocked in if-thread_in_native_trans check. | |
606 JavaThreadState save_state = thread_state(); | |
607 | |
608 if (save_state == _thread_blocked && is_suspend_equivalent()) { | |
609 // If the thread's state is _thread_blocked and this blocking | |
610 // condition is known to be equivalent to a suspend, then we can | |
611 // consider the thread to be externally suspended. This means that | |
612 // the code that sets _thread_blocked has been modified to do | |
613 // self-suspension if the blocking condition releases. We also | |
614 // used to check for CONDVAR_WAIT here, but that is now covered by | |
615 // the _thread_blocked with self-suspension check. | |
616 // | |
617 // Return true since we wouldn't be here unless there was still an | |
618 // external suspend request. | |
619 *bits |= 0x00001000; | |
620 return true; | |
621 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) { | |
622 // Threads running native code will self-suspend on native==>VM/Java | |
623 // transitions. If its stack is walkable (should always be the case | |
624 // unless this function is called before the actual java_suspend() | |
625 // call), then the wait is done. | |
626 *bits |= 0x00002000; | |
627 return true; | |
628 } else if (!called_by_wait && !did_trans_retry && | |
629 save_state == _thread_in_native_trans && | |
630 frame_anchor()->walkable()) { | |
631 // The thread is transitioning from thread_in_native to another | |
632 // thread state. check_safepoint_and_suspend_for_native_trans() | |
633 // will force the thread to self-suspend. If it hasn't gotten | |
634 // there yet we may have caught the thread in-between the native | |
635 // code check above and the self-suspend. Lucky us. If we were | |
636 // called by wait_for_ext_suspend_completion(), then it | |
637 // will be doing the retries so we don't have to. | |
638 // | |
639 // Since we use the saved thread state in the if-statement above, | |
640 // there is a chance that the thread has already transitioned to | |
641 // _thread_blocked by the time we get here. In that case, we will | |
642 // make a single unnecessary pass through the logic below. This | |
643 // doesn't hurt anything since we still do the trans retry. | |
644 | |
645 *bits |= 0x00004000; | |
646 | |
647 // Once the thread leaves thread_in_native_trans for another | |
648 // thread state, we break out of this retry loop. We shouldn't | |
649 // need this flag to prevent us from getting back here, but | |
650 // sometimes paranoia is good. | |
651 did_trans_retry = true; | |
652 | |
653 // We wait for the thread to transition to a more usable state. | |
654 for (int i = 1; i <= SuspendRetryCount; i++) { | |
655 // We used to do an "os::yield_all(i)" call here with the intention | |
656 // that yielding would increase on each retry. However, the parameter | |
657 // is ignored on Linux which means the yield didn't scale up. Waiting | |
658 // on the SR_lock below provides a much more predictable scale up for | |
659 // the delay. It also provides a simple/direct point to check for any | |
660 // safepoint requests from the VMThread | |
661 | |
662 // temporarily drops SR_lock while doing wait with safepoint check | |
663 // (if we're a JavaThread - the WatcherThread can also call this) | |
664 // and increase delay with each retry | |
665 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
666 | |
667 // check the actual thread state instead of what we saved above | |
668 if (thread_state() != _thread_in_native_trans) { | |
669 // the thread has transitioned to another thread state so | |
670 // try all the checks (except this one) one more time. | |
671 do_trans_retry = true; | |
672 break; | |
673 } | |
674 } // end retry loop | |
675 | |
676 | |
677 } | |
678 } while (do_trans_retry); | |
679 | |
680 *bits |= 0x00000010; | |
681 return false; | |
682 } | |
683 | |
684 // | |
685 // Wait for an external suspend request to complete (or be cancelled). | |
686 // Returns true if the thread is externally suspended and false otherwise. | |
687 // | |
688 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, | |
689 uint32_t *bits) { | |
690 TraceSuspendDebugBits tsdb(this, true /* is_wait */, | |
691 false /* !called_by_wait */, bits); | |
692 | |
693 // local flag copies to minimize SR_lock hold time | |
694 bool is_suspended; | |
695 bool pending; | |
696 uint32_t reset_bits; | |
697 | |
698 // set a marker so is_ext_suspend_completed() knows we are the caller | |
699 *bits |= 0x00010000; | |
700 | |
701 // We use reset_bits to reinitialize the bits value at the top of | |
702 // each retry loop. This allows the caller to make use of any | |
703 // unused bits for their own marking purposes. | |
704 reset_bits = *bits; | |
705 | |
706 { | |
707 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
708 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
709 delay, bits); | |
710 pending = is_external_suspend(); | |
711 } | |
712 // must release SR_lock to allow suspension to complete | |
713 | |
714 if (!pending) { | |
715 // A cancelled suspend request is the only false return from | |
716 // is_ext_suspend_completed() that keeps us from entering the | |
717 // retry loop. | |
718 *bits |= 0x00020000; | |
719 return false; | |
720 } | |
721 | |
722 if (is_suspended) { | |
723 *bits |= 0x00040000; | |
724 return true; | |
725 } | |
726 | |
727 for (int i = 1; i <= retries; i++) { | |
728 *bits = reset_bits; // reinit to only track last retry | |
729 | |
730 // We used to do an "os::yield_all(i)" call here with the intention | |
731 // that yielding would increase on each retry. However, the parameter | |
732 // is ignored on Linux which means the yield didn't scale up. Waiting | |
733 // on the SR_lock below provides a much more predictable scale up for | |
734 // the delay. It also provides a simple/direct point to check for any | |
735 // safepoint requests from the VMThread | |
736 | |
737 { | |
738 MutexLocker ml(SR_lock()); | |
739 // wait with safepoint check (if we're a JavaThread - the WatcherThread | |
740 // can also call this) and increase delay with each retry | |
741 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
742 | |
743 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
744 delay, bits); | |
745 | |
746 // It is possible for the external suspend request to be cancelled | |
747 // (by a resume) before the actual suspend operation is completed. | |
748 // Refresh our local copy to see if we still need to wait. | |
749 pending = is_external_suspend(); | |
750 } | |
751 | |
752 if (!pending) { | |
753 // A cancelled suspend request is the only false return from | |
754 // is_ext_suspend_completed() that keeps us from staying in the | |
755 // retry loop. | |
756 *bits |= 0x00080000; | |
757 return false; | |
758 } | |
759 | |
760 if (is_suspended) { | |
761 *bits |= 0x00100000; | |
762 return true; | |
763 } | |
764 } // end retry loop | |
765 | |
766 // thread did not suspend after all our retries | |
767 *bits |= 0x00200000; | |
768 return false; | |
769 } | |
770 | |
771 #ifndef PRODUCT | |
772 void JavaThread::record_jump(address target, address instr, const char* file, int line) { | |
773 | |
774 // This should not need to be atomic as the only way for simultaneous | |
775 // updates is via interrupts. Even then this should be rare or non-existant | |
776 // and we don't care that much anyway. | |
777 | |
778 int index = _jmp_ring_index; | |
779 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); | |
780 _jmp_ring[index]._target = (intptr_t) target; | |
781 _jmp_ring[index]._instruction = (intptr_t) instr; | |
782 _jmp_ring[index]._file = file; | |
783 _jmp_ring[index]._line = line; | |
784 } | |
785 #endif /* PRODUCT */ | |
786 | |
787 // Called by flat profiler | |
788 // Callers have already called wait_for_ext_suspend_completion | |
789 // The assertion for that is currently too complex to put here: | |
790 bool JavaThread::profile_last_Java_frame(frame* _fr) { | |
791 bool gotframe = false; | |
792 // self suspension saves needed state. | |
793 if (has_last_Java_frame() && _anchor.walkable()) { | |
794 *_fr = pd_last_frame(); | |
795 gotframe = true; | |
796 } | |
797 return gotframe; | |
798 } | |
799 | |
800 void Thread::interrupt(Thread* thread) { | |
801 trace("interrupt", thread); | |
802 debug_only(check_for_dangling_thread_pointer(thread);) | |
803 os::interrupt(thread); | |
804 } | |
805 | |
806 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { | |
807 trace("is_interrupted", thread); | |
808 debug_only(check_for_dangling_thread_pointer(thread);) | |
809 // Note: If clear_interrupted==false, this simply fetches and | |
810 // returns the value of the field osthread()->interrupted(). | |
811 return os::is_interrupted(thread, clear_interrupted); | |
812 } | |
813 | |
814 | |
815 // GC Support | |
816 bool Thread::claim_oops_do_par_case(int strong_roots_parity) { | |
817 jint thread_parity = _oops_do_parity; | |
818 if (thread_parity != strong_roots_parity) { | |
819 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); | |
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820 if (res == thread_parity) { |
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821 return true; |
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822 } else { |
0 | 823 guarantee(res == strong_roots_parity, "Or else what?"); |
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824 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
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825 "Should only fail when parallel."); |
0 | 826 return false; |
827 } | |
828 } | |
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829 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
0 | 830 "Should only fail when parallel."); |
831 return false; | |
832 } | |
833 | |
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834 void Thread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 835 active_handles()->oops_do(f); |
836 // Do oop for ThreadShadow | |
837 f->do_oop((oop*)&_pending_exception); | |
838 handle_area()->oops_do(f); | |
839 } | |
840 | |
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841 void Thread::nmethods_do(CodeBlobClosure* cf) { |
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842 // no nmethods in a generic thread... |
0 | 843 } |
844 | |
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845 void Thread::metadata_do(void f(Metadata*)) { |
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846 if (metadata_handles() != NULL) { |
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847 for (int i = 0; i< metadata_handles()->length(); i++) { |
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848 f(metadata_handles()->at(i)); |
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849 } |
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850 } |
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851 } |
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852 |
0 | 853 void Thread::print_on(outputStream* st) const { |
854 // get_priority assumes osthread initialized | |
855 if (osthread() != NULL) { | |
6766 | 856 int os_prio; |
857 if (os::get_native_priority(this, &os_prio) == OS_OK) { | |
858 st->print("os_prio=%d ", os_prio); | |
859 } | |
860 st->print("tid=" INTPTR_FORMAT " ", this); | |
0 | 861 osthread()->print_on(st); |
862 } | |
863 debug_only(if (WizardMode) print_owned_locks_on(st);) | |
864 } | |
865 | |
866 // Thread::print_on_error() is called by fatal error handler. Don't use | |
867 // any lock or allocate memory. | |
868 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { | |
869 if (is_VM_thread()) st->print("VMThread"); | |
870 else if (is_Compiler_thread()) st->print("CompilerThread"); | |
871 else if (is_Java_thread()) st->print("JavaThread"); | |
872 else if (is_GC_task_thread()) st->print("GCTaskThread"); | |
873 else if (is_Watcher_thread()) st->print("WatcherThread"); | |
874 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); | |
875 else st->print("Thread"); | |
876 | |
877 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", | |
878 _stack_base - _stack_size, _stack_base); | |
879 | |
880 if (osthread()) { | |
881 st->print(" [id=%d]", osthread()->thread_id()); | |
882 } | |
883 } | |
884 | |
885 #ifdef ASSERT | |
886 void Thread::print_owned_locks_on(outputStream* st) const { | |
887 Monitor *cur = _owned_locks; | |
888 if (cur == NULL) { | |
889 st->print(" (no locks) "); | |
890 } else { | |
891 st->print_cr(" Locks owned:"); | |
892 while(cur) { | |
893 cur->print_on(st); | |
894 cur = cur->next(); | |
895 } | |
896 } | |
897 } | |
898 | |
899 static int ref_use_count = 0; | |
900 | |
901 bool Thread::owns_locks_but_compiled_lock() const { | |
902 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
903 if (cur != Compile_lock) return true; | |
904 } | |
905 return false; | |
906 } | |
907 | |
908 | |
909 #endif | |
910 | |
911 #ifndef PRODUCT | |
912 | |
913 // The flag: potential_vm_operation notifies if this particular safepoint state could potential | |
914 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that | |
915 // no threads which allow_vm_block's are held | |
916 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { | |
917 // Check if current thread is allowed to block at a safepoint | |
918 if (!(_allow_safepoint_count == 0)) | |
919 fatal("Possible safepoint reached by thread that does not allow it"); | |
920 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { | |
921 fatal("LEAF method calling lock?"); | |
922 } | |
923 | |
924 #ifdef ASSERT | |
925 if (potential_vm_operation && is_Java_thread() | |
926 && !Universe::is_bootstrapping()) { | |
927 // Make sure we do not hold any locks that the VM thread also uses. | |
928 // This could potentially lead to deadlocks | |
929 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
930 // Threads_lock is special, since the safepoint synchronization will not start before this is | |
931 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, | |
932 // since it is used to transfer control between JavaThreads and the VMThread | |
933 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! | |
934 if ( (cur->allow_vm_block() && | |
935 cur != Threads_lock && | |
936 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation | |
937 cur != VMOperationRequest_lock && | |
938 cur != VMOperationQueue_lock) || | |
939 cur->rank() == Mutex::special) { | |
940 warning("Thread holding lock at safepoint that vm can block on: %s", cur->name()); | |
941 } | |
942 } | |
943 } | |
944 | |
945 if (GCALotAtAllSafepoints) { | |
946 // We could enter a safepoint here and thus have a gc | |
947 InterfaceSupport::check_gc_alot(); | |
948 } | |
949 #endif | |
950 } | |
951 #endif | |
952 | |
953 bool Thread::is_in_stack(address adr) const { | |
954 assert(Thread::current() == this, "is_in_stack can only be called from current thread"); | |
955 address end = os::current_stack_pointer(); | |
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956 // Allow non Java threads to call this without stack_base |
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957 if (_stack_base == NULL) return true; |
0 | 958 if (stack_base() >= adr && adr >= end) return true; |
959 | |
960 return false; | |
961 } | |
962 | |
963 | |
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964 bool Thread::is_in_usable_stack(address adr) const { |
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965 size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0; |
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966 size_t usable_stack_size = _stack_size - stack_guard_size; |
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967 |
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968 return ((adr < stack_base()) && (adr >= stack_base() - usable_stack_size)); |
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969 } |
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970 |
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971 |
0 | 972 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter |
973 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being | |
974 // used for compilation in the future. If that change is made, the need for these methods | |
975 // should be revisited, and they should be removed if possible. | |
976 | |
977 bool Thread::is_lock_owned(address adr) const { | |
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978 return on_local_stack(adr); |
0 | 979 } |
980 | |
981 bool Thread::set_as_starting_thread() { | |
982 // NOTE: this must be called inside the main thread. | |
983 return os::create_main_thread((JavaThread*)this); | |
984 } | |
985 | |
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986 static void initialize_class(Symbol* class_name, TRAPS) { |
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987 Klass* klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
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988 InstanceKlass::cast(klass)->initialize(CHECK); |
0 | 989 } |
990 | |
991 | |
992 // Creates the initial ThreadGroup | |
993 static Handle create_initial_thread_group(TRAPS) { | |
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994 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
0 | 995 instanceKlassHandle klass (THREAD, k); |
996 | |
997 Handle system_instance = klass->allocate_instance_handle(CHECK_NH); | |
998 { | |
999 JavaValue result(T_VOID); | |
1000 JavaCalls::call_special(&result, | |
1001 system_instance, | |
1002 klass, | |
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1003 vmSymbols::object_initializer_name(), |
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1004 vmSymbols::void_method_signature(), |
0 | 1005 CHECK_NH); |
1006 } | |
1007 Universe::set_system_thread_group(system_instance()); | |
1008 | |
1009 Handle main_instance = klass->allocate_instance_handle(CHECK_NH); | |
1010 { | |
1011 JavaValue result(T_VOID); | |
1012 Handle string = java_lang_String::create_from_str("main", CHECK_NH); | |
1013 JavaCalls::call_special(&result, | |
1014 main_instance, | |
1015 klass, | |
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1016 vmSymbols::object_initializer_name(), |
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1017 vmSymbols::threadgroup_string_void_signature(), |
0 | 1018 system_instance, |
1019 string, | |
1020 CHECK_NH); | |
1021 } | |
1022 return main_instance; | |
1023 } | |
1024 | |
1025 // Creates the initial Thread | |
1026 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { | |
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1027 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
0 | 1028 instanceKlassHandle klass (THREAD, k); |
1029 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); | |
1030 | |
1031 java_lang_Thread::set_thread(thread_oop(), thread); | |
1032 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1033 thread->set_threadObj(thread_oop()); | |
1034 | |
1035 Handle string = java_lang_String::create_from_str("main", CHECK_NULL); | |
1036 | |
1037 JavaValue result(T_VOID); | |
1038 JavaCalls::call_special(&result, thread_oop, | |
1039 klass, | |
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1040 vmSymbols::object_initializer_name(), |
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1041 vmSymbols::threadgroup_string_void_signature(), |
0 | 1042 thread_group, |
1043 string, | |
1044 CHECK_NULL); | |
1045 return thread_oop(); | |
1046 } | |
1047 | |
1048 static void call_initializeSystemClass(TRAPS) { | |
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1049 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1050 instanceKlassHandle klass (THREAD, k); |
1051 | |
1052 JavaValue result(T_VOID); | |
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1053 JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
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1054 vmSymbols::void_method_signature(), CHECK); |
0 | 1055 } |
1056 | |
6181 | 1057 char java_runtime_name[128] = ""; |
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1058 char java_runtime_version[128] = ""; |
6181 | 1059 |
1060 // extract the JRE name from sun.misc.Version.java_runtime_name | |
1061 static const char* get_java_runtime_name(TRAPS) { | |
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1062 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
6181 | 1063 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
1064 fieldDescriptor fd; | |
1065 bool found = k != NULL && | |
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1066 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_name_name(), |
6181 | 1067 vmSymbols::string_signature(), &fd); |
1068 if (found) { | |
1069 oop name_oop = k->java_mirror()->obj_field(fd.offset()); | |
1070 if (name_oop == NULL) | |
1071 return NULL; | |
1072 const char* name = java_lang_String::as_utf8_string(name_oop, | |
1073 java_runtime_name, | |
1074 sizeof(java_runtime_name)); | |
1075 return name; | |
1076 } else { | |
1077 return NULL; | |
1078 } | |
1079 } | |
1080 | |
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1081 // extract the JRE version from sun.misc.Version.java_runtime_version |
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1082 static const char* get_java_runtime_version(TRAPS) { |
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1083 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
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1084 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
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1085 fieldDescriptor fd; |
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1086 bool found = k != NULL && |
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1087 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_version_name(), |
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1088 vmSymbols::string_signature(), &fd); |
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1089 if (found) { |
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1090 oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
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1091 if (name_oop == NULL) |
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1092 return NULL; |
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1093 const char* name = java_lang_String::as_utf8_string(name_oop, |
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1094 java_runtime_version, |
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1095 sizeof(java_runtime_version)); |
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1096 return name; |
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1097 } else { |
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1098 return NULL; |
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1099 } |
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1100 } |
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1101 |
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1102 // General purpose hook into Java code, run once when the VM is initialized. |
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1103 // The Java library method itself may be changed independently from the VM. |
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1104 static void call_postVMInitHook(TRAPS) { |
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1105 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_PostVMInitHook(), THREAD); |
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1106 instanceKlassHandle klass (THREAD, k); |
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1107 if (klass.not_null()) { |
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1108 JavaValue result(T_VOID); |
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1109 JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
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1110 vmSymbols::void_method_signature(), |
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1111 CHECK); |
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1112 } |
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1113 } |
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1114 |
0 | 1115 static void reset_vm_info_property(TRAPS) { |
1116 // the vm info string | |
1117 ResourceMark rm(THREAD); | |
1118 const char *vm_info = VM_Version::vm_info_string(); | |
1119 | |
1120 // java.lang.System class | |
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1121 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
0 | 1122 instanceKlassHandle klass (THREAD, k); |
1123 | |
1124 // setProperty arguments | |
1125 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); | |
1126 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); | |
1127 | |
1128 // return value | |
1129 JavaValue r(T_OBJECT); | |
1130 | |
1131 // public static String setProperty(String key, String value); | |
1132 JavaCalls::call_static(&r, | |
1133 klass, | |
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1134 vmSymbols::setProperty_name(), |
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1135 vmSymbols::string_string_string_signature(), |
0 | 1136 key_str, |
1137 value_str, | |
1138 CHECK); | |
1139 } | |
1140 | |
1141 | |
1142 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { | |
1143 assert(thread_group.not_null(), "thread group should be specified"); | |
1144 assert(threadObj() == NULL, "should only create Java thread object once"); | |
1145 | |
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1146 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
0 | 1147 instanceKlassHandle klass (THREAD, k); |
1148 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
1149 | |
1150 java_lang_Thread::set_thread(thread_oop(), this); | |
1151 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
1152 set_threadObj(thread_oop()); | |
1153 | |
1154 JavaValue result(T_VOID); | |
1155 if (thread_name != NULL) { | |
1156 Handle name = java_lang_String::create_from_str(thread_name, CHECK); | |
1157 // Thread gets assigned specified name and null target | |
1158 JavaCalls::call_special(&result, | |
1159 thread_oop, | |
1160 klass, | |
2177
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1161 vmSymbols::object_initializer_name(), |
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1162 vmSymbols::threadgroup_string_void_signature(), |
0 | 1163 thread_group, // Argument 1 |
1164 name, // Argument 2 | |
1165 THREAD); | |
1166 } else { | |
1167 // Thread gets assigned name "Thread-nnn" and null target | |
1168 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) | |
1169 JavaCalls::call_special(&result, | |
1170 thread_oop, | |
1171 klass, | |
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1172 vmSymbols::object_initializer_name(), |
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1173 vmSymbols::threadgroup_runnable_void_signature(), |
0 | 1174 thread_group, // Argument 1 |
1175 Handle(), // Argument 2 | |
1176 THREAD); | |
1177 } | |
1178 | |
1179 | |
1180 if (daemon) { | |
1181 java_lang_Thread::set_daemon(thread_oop()); | |
1182 } | |
1183 | |
1184 if (HAS_PENDING_EXCEPTION) { | |
1185 return; | |
1186 } | |
1187 | |
1142 | 1188 KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
0 | 1189 Handle threadObj(this, this->threadObj()); |
1190 | |
1191 JavaCalls::call_special(&result, | |
1192 thread_group, | |
1193 group, | |
2177
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1194 vmSymbols::add_method_name(), |
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1195 vmSymbols::thread_void_signature(), |
0 | 1196 threadObj, // Arg 1 |
1197 THREAD); | |
1198 | |
1199 | |
1200 } | |
1201 | |
1202 // NamedThread -- non-JavaThread subclasses with multiple | |
1203 // uniquely named instances should derive from this. | |
1204 NamedThread::NamedThread() : Thread() { | |
1205 _name = NULL; | |
1119
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1206 _processed_thread = NULL; |
0 | 1207 } |
1208 | |
1209 NamedThread::~NamedThread() { | |
1210 if (_name != NULL) { | |
6197 | 1211 FREE_C_HEAP_ARRAY(char, _name, mtThread); |
0 | 1212 _name = NULL; |
1213 } | |
1214 } | |
1215 | |
1216 void NamedThread::set_name(const char* format, ...) { | |
1217 guarantee(_name == NULL, "Only get to set name once."); | |
6197 | 1218 _name = NEW_C_HEAP_ARRAY(char, max_name_len, mtThread); |
0 | 1219 guarantee(_name != NULL, "alloc failure"); |
1220 va_list ap; | |
1221 va_start(ap, format); | |
1222 jio_vsnprintf(_name, max_name_len, format, ap); | |
1223 va_end(ap); | |
1224 } | |
1225 | |
1226 // ======= WatcherThread ======== | |
1227 | |
1228 // The watcher thread exists to simulate timer interrupts. It should | |
1229 // be replaced by an abstraction over whatever native support for | |
1230 // timer interrupts exists on the platform. | |
1231 | |
1232 WatcherThread* WatcherThread::_watcher_thread = NULL; | |
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1233 bool WatcherThread::_startable = false; |
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1234 volatile bool WatcherThread::_should_terminate = false; |
0 | 1235 |
11151 | 1236 WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) { |
0 | 1237 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); |
1238 if (os::create_thread(this, os::watcher_thread)) { | |
1239 _watcher_thread = this; | |
1240 | |
1241 // Set the watcher thread to the highest OS priority which should not be | |
1242 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY | |
1243 // is created. The only normal thread using this priority is the reference | |
1244 // handler thread, which runs for very short intervals only. | |
1245 // If the VMThread's priority is not lower than the WatcherThread profiling | |
1246 // will be inaccurate. | |
1247 os::set_priority(this, MaxPriority); | |
1248 if (!DisableStartThread) { | |
1249 os::start_thread(this); | |
1250 } | |
1251 } | |
1252 } | |
1253 | |
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1254 int WatcherThread::sleep() const { |
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1255 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1256 |
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1257 // remaining will be zero if there are no tasks, |
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1258 // causing the WatcherThread to sleep until a task is |
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1259 // enrolled |
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1260 int remaining = PeriodicTask::time_to_wait(); |
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1261 int time_slept = 0; |
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1262 |
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1263 // we expect this to timeout - we only ever get unparked when |
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1264 // we should terminate or when a new task has been enrolled |
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1265 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
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1266 |
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1267 jlong time_before_loop = os::javaTimeNanos(); |
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1268 |
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1269 for (;;) { |
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1270 bool timedout = PeriodicTask_lock->wait(Mutex::_no_safepoint_check_flag, remaining); |
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1271 jlong now = os::javaTimeNanos(); |
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1272 |
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1273 if (remaining == 0) { |
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1274 // if we didn't have any tasks we could have waited for a long time |
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1275 // consider the time_slept zero and reset time_before_loop |
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1276 time_slept = 0; |
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1277 time_before_loop = now; |
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1278 } else { |
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1279 // need to recalulate since we might have new tasks in _tasks |
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1280 time_slept = (int) ((now - time_before_loop) / 1000000); |
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1281 } |
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1282 |
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1283 // Change to task list or spurious wakeup of some kind |
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1284 if (timedout || _should_terminate) { |
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1285 break; |
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1286 } |
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1287 |
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1288 remaining = PeriodicTask::time_to_wait(); |
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1289 if (remaining == 0) { |
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1290 // Last task was just disenrolled so loop around and wait until |
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1291 // another task gets enrolled |
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1292 continue; |
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1293 } |
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1294 |
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1295 remaining -= time_slept; |
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1296 if (remaining <= 0) |
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1297 break; |
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1298 } |
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1299 |
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1300 return time_slept; |
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1301 } |
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1302 |
0 | 1303 void WatcherThread::run() { |
1304 assert(this == watcher_thread(), "just checking"); | |
1305 | |
1306 this->record_stack_base_and_size(); | |
1307 this->initialize_thread_local_storage(); | |
1308 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1309 while(!_should_terminate) { | |
1310 assert(watcher_thread() == Thread::current(), "thread consistency check"); | |
1311 assert(watcher_thread() == this, "thread consistency check"); | |
1312 | |
1313 // Calculate how long it'll be until the next PeriodicTask work | |
1314 // should be done, and sleep that amount of time. | |
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1315 int time_waited = sleep(); |
0 | 1316 |
1317 if (is_error_reported()) { | |
1318 // A fatal error has happened, the error handler(VMError::report_and_die) | |
1319 // should abort JVM after creating an error log file. However in some | |
1320 // rare cases, the error handler itself might deadlock. Here we try to | |
1321 // kill JVM if the fatal error handler fails to abort in 2 minutes. | |
1322 // | |
1323 // This code is in WatcherThread because WatcherThread wakes up | |
1324 // periodically so the fatal error handler doesn't need to do anything; | |
1325 // also because the WatcherThread is less likely to crash than other | |
1326 // threads. | |
1327 | |
1328 for (;;) { | |
1329 if (!ShowMessageBoxOnError | |
1330 && (OnError == NULL || OnError[0] == '\0') | |
1331 && Arguments::abort_hook() == NULL) { | |
1332 os::sleep(this, 2 * 60 * 1000, false); | |
1333 fdStream err(defaultStream::output_fd()); | |
1334 err.print_raw_cr("# [ timer expired, abort... ]"); | |
1335 // skip atexit/vm_exit/vm_abort hooks | |
1336 os::die(); | |
1337 } | |
1338 | |
1339 // Wake up 5 seconds later, the fatal handler may reset OnError or | |
1340 // ShowMessageBoxOnError when it is ready to abort. | |
1341 os::sleep(this, 5 * 1000, false); | |
1342 } | |
1343 } | |
1344 | |
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1345 PeriodicTask::real_time_tick(time_waited); |
0 | 1346 } |
1347 | |
1348 // Signal that it is terminated | |
1349 { | |
1350 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); | |
1351 _watcher_thread = NULL; | |
1352 Terminator_lock->notify(); | |
1353 } | |
1354 | |
1355 // Thread destructor usually does this.. | |
1356 ThreadLocalStorage::set_thread(NULL); | |
1357 } | |
1358 | |
1359 void WatcherThread::start() { | |
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1360 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1361 |
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1362 if (watcher_thread() == NULL && _startable) { |
0 | 1363 _should_terminate = false; |
1364 // Create the single instance of WatcherThread | |
1365 new WatcherThread(); | |
1366 } | |
1367 } | |
1368 | |
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1369 void WatcherThread::make_startable() { |
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1370 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1371 _startable = true; |
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1372 } |
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1373 |
0 | 1374 void WatcherThread::stop() { |
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1375 { |
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1376 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1377 _should_terminate = true; |
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1378 OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
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1379 |
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1380 WatcherThread* watcher = watcher_thread(); |
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1381 if (watcher != NULL) |
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1382 watcher->unpark(); |
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1383 } |
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1384 |
0 | 1385 // it is ok to take late safepoints here, if needed |
1386 MutexLocker mu(Terminator_lock); | |
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1387 |
0 | 1388 while(watcher_thread() != NULL) { |
1389 // This wait should make safepoint checks, wait without a timeout, | |
1390 // and wait as a suspend-equivalent condition. | |
1391 // | |
1392 // Note: If the FlatProfiler is running, then this thread is waiting | |
1393 // for the WatcherThread to terminate and the WatcherThread, via the | |
1394 // FlatProfiler task, is waiting for the external suspend request on | |
1395 // this thread to complete. wait_for_ext_suspend_completion() will | |
1396 // eventually timeout, but that takes time. Making this wait a | |
1397 // suspend-equivalent condition solves that timeout problem. | |
1398 // | |
1399 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
1400 Mutex::_as_suspend_equivalent_flag); | |
1401 } | |
1402 } | |
1403 | |
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1404 void WatcherThread::unpark() { |
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1405 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1406 PeriodicTask_lock->notify(); |
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1407 } |
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1408 |
0 | 1409 void WatcherThread::print_on(outputStream* st) const { |
1410 st->print("\"%s\" ", name()); | |
1411 Thread::print_on(st); | |
1412 st->cr(); | |
1413 } | |
1414 | |
1415 // ======= JavaThread ======== | |
1416 | |
1417 // A JavaThread is a normal Java thread | |
1418 | |
1419 void JavaThread::initialize() { | |
1420 // Initialize fields | |
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1421 |
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1422 // Set the claimed par_id to UINT_MAX (ie not claiming any par_ids) |
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1423 set_claimed_par_id(UINT_MAX); |
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1424 |
0 | 1425 set_saved_exception_pc(NULL); |
1426 set_threadObj(NULL); | |
1427 _anchor.clear(); | |
1428 set_entry_point(NULL); | |
1429 set_jni_functions(jni_functions()); | |
1430 set_callee_target(NULL); | |
1431 set_vm_result(NULL); | |
1432 set_vm_result_2(NULL); | |
1433 set_vframe_array_head(NULL); | |
1434 set_vframe_array_last(NULL); | |
1435 set_deferred_locals(NULL); | |
1436 set_deopt_mark(NULL); | |
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1437 set_deopt_nmethod(NULL); |
0 | 1438 clear_must_deopt_id(); |
1439 set_monitor_chunks(NULL); | |
1440 set_next(NULL); | |
1441 set_thread_state(_thread_new); | |
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1442 #if INCLUDE_NMT |
6197 | 1443 set_recorder(NULL); |
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1444 #endif |
0 | 1445 _terminated = _not_terminated; |
1446 _privileged_stack_top = NULL; | |
1447 _array_for_gc = NULL; | |
1448 _suspend_equivalent = false; | |
1449 _in_deopt_handler = 0; | |
1450 _doing_unsafe_access = false; | |
1451 _stack_guard_state = stack_guard_unused; | |
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1452 (void)const_cast<oop&>(_exception_oop = NULL); |
0 | 1453 _exception_pc = 0; |
1454 _exception_handler_pc = 0; | |
1903 | 1455 _is_method_handle_return = 0; |
0 | 1456 _jvmti_thread_state= NULL; |
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1457 _should_post_on_exceptions_flag = JNI_FALSE; |
0 | 1458 _jvmti_get_loaded_classes_closure = NULL; |
1459 _interp_only_mode = 0; | |
1460 _special_runtime_exit_condition = _no_async_condition; | |
1461 _pending_async_exception = NULL; | |
1462 _thread_stat = NULL; | |
1463 _thread_stat = new ThreadStatistics(); | |
1464 _blocked_on_compilation = false; | |
1465 _jni_active_critical = 0; | |
1466 _do_not_unlock_if_synchronized = false; | |
1467 _cached_monitor_info = NULL; | |
1468 _parker = Parker::Allocate(this) ; | |
1469 | |
1470 #ifndef PRODUCT | |
1471 _jmp_ring_index = 0; | |
1472 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { | |
1473 record_jump(NULL, NULL, NULL, 0); | |
1474 } | |
1475 #endif /* PRODUCT */ | |
1476 | |
1477 set_thread_profiler(NULL); | |
1478 if (FlatProfiler::is_active()) { | |
1479 // This is where we would decide to either give each thread it's own profiler | |
1480 // or use one global one from FlatProfiler, | |
1481 // or up to some count of the number of profiled threads, etc. | |
1482 ThreadProfiler* pp = new ThreadProfiler(); | |
1483 pp->engage(); | |
1484 set_thread_profiler(pp); | |
1485 } | |
1486 | |
1487 // Setup safepoint state info for this thread | |
1488 ThreadSafepointState::create(this); | |
1489 | |
1490 debug_only(_java_call_counter = 0); | |
1491 | |
1492 // JVMTI PopFrame support | |
1493 _popframe_condition = popframe_inactive; | |
1494 _popframe_preserved_args = NULL; | |
1495 _popframe_preserved_args_size = 0; | |
1496 | |
1497 pd_initialize(); | |
1498 } | |
1499 | |
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1500 #if INCLUDE_ALL_GCS |
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1501 SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
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1502 DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
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1503 #endif // INCLUDE_ALL_GCS |
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1504 |
4006 | 1505 JavaThread::JavaThread(bool is_attaching_via_jni) : |
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1506 Thread() |
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1507 #if INCLUDE_ALL_GCS |
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1508 , _satb_mark_queue(&_satb_mark_queue_set), |
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1509 _dirty_card_queue(&_dirty_card_queue_set) |
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1510 #endif // INCLUDE_ALL_GCS |
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1511 { |
0 | 1512 initialize(); |
4006 | 1513 if (is_attaching_via_jni) { |
1514 _jni_attach_state = _attaching_via_jni; | |
1515 } else { | |
1516 _jni_attach_state = _not_attaching_via_jni; | |
1517 } | |
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1518 assert(deferred_card_mark().is_empty(), "Default MemRegion ctor"); |
6197 | 1519 _safepoint_visible = false; |
0 | 1520 } |
1521 | |
1522 bool JavaThread::reguard_stack(address cur_sp) { | |
1523 if (_stack_guard_state != stack_guard_yellow_disabled) { | |
1524 return true; // Stack already guarded or guard pages not needed. | |
1525 } | |
1526 | |
1527 if (register_stack_overflow()) { | |
1528 // For those architectures which have separate register and | |
1529 // memory stacks, we must check the register stack to see if | |
1530 // it has overflowed. | |
1531 return false; | |
1532 } | |
1533 | |
1534 // Java code never executes within the yellow zone: the latter is only | |
1535 // there to provoke an exception during stack banging. If java code | |
1536 // is executing there, either StackShadowPages should be larger, or | |
1537 // some exception code in c1, c2 or the interpreter isn't unwinding | |
1538 // when it should. | |
1539 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); | |
1540 | |
1541 enable_stack_yellow_zone(); | |
1542 return true; | |
1543 } | |
1544 | |
1545 bool JavaThread::reguard_stack(void) { | |
1546 return reguard_stack(os::current_stack_pointer()); | |
1547 } | |
1548 | |
1549 | |
1550 void JavaThread::block_if_vm_exited() { | |
1551 if (_terminated == _vm_exited) { | |
1552 // _vm_exited is set at safepoint, and Threads_lock is never released | |
1553 // we will block here forever | |
1554 Threads_lock->lock_without_safepoint_check(); | |
1555 ShouldNotReachHere(); | |
1556 } | |
1557 } | |
1558 | |
1559 | |
1560 // Remove this ifdef when C1 is ported to the compiler interface. | |
1561 static void compiler_thread_entry(JavaThread* thread, TRAPS); | |
1562 | |
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1563 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
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1564 Thread() |
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1565 #if INCLUDE_ALL_GCS |
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1566 , _satb_mark_queue(&_satb_mark_queue_set), |
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1567 _dirty_card_queue(&_dirty_card_queue_set) |
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1568 #endif // INCLUDE_ALL_GCS |
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1569 { |
0 | 1570 if (TraceThreadEvents) { |
1571 tty->print_cr("creating thread %p", this); | |
1572 } | |
1573 initialize(); | |
4006 | 1574 _jni_attach_state = _not_attaching_via_jni; |
0 | 1575 set_entry_point(entry_point); |
1576 // Create the native thread itself. | |
1577 // %note runtime_23 | |
1578 os::ThreadType thr_type = os::java_thread; | |
1579 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : | |
1580 os::java_thread; | |
1581 os::create_thread(this, thr_type, stack_sz); | |
6197 | 1582 _safepoint_visible = false; |
0 | 1583 // The _osthread may be NULL here because we ran out of memory (too many threads active). |
1584 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller | |
1585 // may hold a lock and all locks must be unlocked before throwing the exception (throwing | |
1586 // the exception consists of creating the exception object & initializing it, initialization | |
1587 // will leave the VM via a JavaCall and then all locks must be unlocked). | |
1588 // | |
1589 // The thread is still suspended when we reach here. Thread must be explicit started | |
1590 // by creator! Furthermore, the thread must also explicitly be added to the Threads list | |
1591 // by calling Threads:add. The reason why this is not done here, is because the thread | |
1592 // object must be fully initialized (take a look at JVM_Start) | |
1593 } | |
1594 | |
1595 JavaThread::~JavaThread() { | |
1596 if (TraceThreadEvents) { | |
1597 tty->print_cr("terminate thread %p", this); | |
1598 } | |
1599 | |
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1600 // By now, this thread should already be invisible to safepoint, |
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1601 // and its per-thread recorder also collected. |
6197 | 1602 assert(!is_safepoint_visible(), "wrong state"); |
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1603 #if INCLUDE_NMT |
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1604 assert(get_recorder() == NULL, "Already collected"); |
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1605 #endif // INCLUDE_NMT |
6197 | 1606 |
0 | 1607 // JSR166 -- return the parker to the free list |
1608 Parker::Release(_parker); | |
1609 _parker = NULL ; | |
1610 | |
1611 // Free any remaining previous UnrollBlock | |
1612 vframeArray* old_array = vframe_array_last(); | |
1613 | |
1614 if (old_array != NULL) { | |
1615 Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); | |
1616 old_array->set_unroll_block(NULL); | |
1617 delete old_info; | |
1618 delete old_array; | |
1619 } | |
1620 | |
1621 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); | |
1622 if (deferred != NULL) { | |
1623 // This can only happen if thread is destroyed before deoptimization occurs. | |
1624 assert(deferred->length() != 0, "empty array!"); | |
1625 do { | |
1626 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); | |
1627 deferred->remove_at(0); | |
1628 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
1629 delete dlv; | |
1630 } while (deferred->length() != 0); | |
1631 delete deferred; | |
1632 } | |
1633 | |
1634 // All Java related clean up happens in exit | |
1635 ThreadSafepointState::destroy(this); | |
1636 if (_thread_profiler != NULL) delete _thread_profiler; | |
1637 if (_thread_stat != NULL) delete _thread_stat; | |
1638 } | |
1639 | |
1640 | |
1641 // The first routine called by a new Java thread | |
1642 void JavaThread::run() { | |
1643 // initialize thread-local alloc buffer related fields | |
1644 this->initialize_tlab(); | |
1645 | |
1646 // used to test validitity of stack trace backs | |
1647 this->record_base_of_stack_pointer(); | |
1648 | |
1649 // Record real stack base and size. | |
1650 this->record_stack_base_and_size(); | |
1651 | |
1652 // Initialize thread local storage; set before calling MutexLocker | |
1653 this->initialize_thread_local_storage(); | |
1654 | |
1655 this->create_stack_guard_pages(); | |
1656 | |
1681
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diff
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|
1657 this->cache_global_variables(); |
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|
1658 |
0 | 1659 // Thread is now sufficient initialized to be handled by the safepoint code as being |
1660 // in the VM. Change thread state from _thread_new to _thread_in_vm | |
1661 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); | |
1662 | |
1663 assert(JavaThread::current() == this, "sanity check"); | |
1664 assert(!Thread::current()->owns_locks(), "sanity check"); | |
1665 | |
1666 DTRACE_THREAD_PROBE(start, this); | |
1667 | |
1668 // This operation might block. We call that after all safepoint checks for a new thread has | |
1669 // been completed. | |
1670 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
1671 | |
1672 if (JvmtiExport::should_post_thread_life()) { | |
1673 JvmtiExport::post_thread_start(this); | |
1674 } | |
1675 | |
10405 | 1676 EventThreadStart event; |
1677 if (event.should_commit()) { | |
1678 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1679 event.commit(); | |
1680 } | |
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7115199: Add event tracing hooks and Java Flight Recorder infrastructure
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|
1681 |
0 | 1682 // We call another function to do the rest so we are sure that the stack addresses used |
1683 // from there will be lower than the stack base just computed | |
1684 thread_main_inner(); | |
1685 | |
1686 // Note, thread is no longer valid at this point! | |
1687 } | |
1688 | |
1689 | |
1690 void JavaThread::thread_main_inner() { | |
1691 assert(JavaThread::current() == this, "sanity check"); | |
1692 assert(this->threadObj() != NULL, "just checking"); | |
1693 | |
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|
1694 // Execute thread entry point unless this thread has a pending exception |
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|
1695 // or has been stopped before starting. |
0 | 1696 // Note: Due to JVM_StopThread we can have pending exceptions already! |
2162
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1697 if (!this->has_pending_exception() && |
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1698 !java_lang_Thread::is_stillborn(this->threadObj())) { |
4006 | 1699 { |
1700 ResourceMark rm(this); | |
1701 this->set_native_thread_name(this->get_thread_name()); | |
1702 } | |
0 | 1703 HandleMark hm(this); |
1704 this->entry_point()(this, this); | |
1705 } | |
1706 | |
1707 DTRACE_THREAD_PROBE(stop, this); | |
1708 | |
1709 this->exit(false); | |
1710 delete this; | |
1711 } | |
1712 | |
1713 | |
1714 static void ensure_join(JavaThread* thread) { | |
1715 // We do not need to grap the Threads_lock, since we are operating on ourself. | |
1716 Handle threadObj(thread, thread->threadObj()); | |
1717 assert(threadObj.not_null(), "java thread object must exist"); | |
1718 ObjectLocker lock(threadObj, thread); | |
1719 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1720 thread->clear_pending_exception(); | |
1721 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. | |
1722 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); | |
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1723 // Clear the native thread instance - this makes isAlive return false and allows the join() |
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|
1724 // to complete once we've done the notify_all below |
0 | 1725 java_lang_Thread::set_thread(threadObj(), NULL); |
1726 lock.notify_all(thread); | |
1727 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
1728 thread->clear_pending_exception(); | |
1729 } | |
1730 | |
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|
1731 |
0 | 1732 // For any new cleanup additions, please check to see if they need to be applied to |
1733 // cleanup_failed_attach_current_thread as well. | |
1734 void JavaThread::exit(bool destroy_vm, ExitType exit_type) { | |
1735 assert(this == JavaThread::current(), "thread consistency check"); | |
1736 | |
1737 HandleMark hm(this); | |
1738 Handle uncaught_exception(this, this->pending_exception()); | |
1739 this->clear_pending_exception(); | |
1740 Handle threadObj(this, this->threadObj()); | |
1741 assert(threadObj.not_null(), "Java thread object should be created"); | |
1742 | |
1743 if (get_thread_profiler() != NULL) { | |
1744 get_thread_profiler()->disengage(); | |
1745 ResourceMark rm; | |
1746 get_thread_profiler()->print(get_thread_name()); | |
1747 } | |
1748 | |
1749 | |
1750 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place | |
1751 { | |
1752 EXCEPTION_MARK; | |
1753 | |
1754 CLEAR_PENDING_EXCEPTION; | |
1755 } | |
1756 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This | |
1757 // has to be fixed by a runtime query method | |
1758 if (!destroy_vm || JDK_Version::is_jdk12x_version()) { | |
1759 // JSR-166: change call from from ThreadGroup.uncaughtException to | |
1760 // java.lang.Thread.dispatchUncaughtException | |
1761 if (uncaught_exception.not_null()) { | |
1762 Handle group(this, java_lang_Thread::threadGroup(threadObj())); | |
1763 { | |
1764 EXCEPTION_MARK; | |
1765 // Check if the method Thread.dispatchUncaughtException() exists. If so | |
1766 // call it. Otherwise we have an older library without the JSR-166 changes, | |
1767 // so call ThreadGroup.uncaughtException() | |
1768 KlassHandle recvrKlass(THREAD, threadObj->klass()); | |
1769 CallInfo callinfo; | |
1142 | 1770 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1771 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
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1772 vmSymbols::dispatchUncaughtException_name(), |
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|
1773 vmSymbols::throwable_void_signature(), |
0 | 1774 KlassHandle(), false, false, THREAD); |
1775 CLEAR_PENDING_EXCEPTION; | |
1776 methodHandle method = callinfo.selected_method(); | |
1777 if (method.not_null()) { | |
1778 JavaValue result(T_VOID); | |
1779 JavaCalls::call_virtual(&result, | |
1780 threadObj, thread_klass, | |
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1781 vmSymbols::dispatchUncaughtException_name(), |
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|
1782 vmSymbols::throwable_void_signature(), |
0 | 1783 uncaught_exception, |
1784 THREAD); | |
1785 } else { | |
1142 | 1786 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
0 | 1787 JavaValue result(T_VOID); |
1788 JavaCalls::call_virtual(&result, | |
1789 group, thread_group, | |
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|
1790 vmSymbols::uncaughtException_name(), |
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|
1791 vmSymbols::thread_throwable_void_signature(), |
0 | 1792 threadObj, // Arg 1 |
1793 uncaught_exception, // Arg 2 | |
1794 THREAD); | |
1795 } | |
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1796 if (HAS_PENDING_EXCEPTION) { |
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1797 ResourceMark rm(this); |
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1798 jio_fprintf(defaultStream::error_stream(), |
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1799 "\nException: %s thrown from the UncaughtExceptionHandler" |
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1800 " in thread \"%s\"\n", |
6983 | 1801 pending_exception()->klass()->external_name(), |
2200
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1802 get_thread_name()); |
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1803 CLEAR_PENDING_EXCEPTION; |
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1804 } |
0 | 1805 } |
1806 } | |
1807 | |
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1808 // Called before the java thread exit since we want to read info |
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1809 // from java_lang_Thread object |
10405 | 1810 EventThreadEnd event; |
1811 if (event.should_commit()) { | |
1812 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
1813 event.commit(); | |
1814 } | |
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1815 |
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1816 // Call after last event on thread |
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1817 EVENT_THREAD_EXIT(this); |
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1818 |
0 | 1819 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
1820 // the execution of the method. If that is not enough, then we don't really care. Thread.stop | |
1821 // is deprecated anyhow. | |
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1822 if (!is_Compiler_thread()) { |
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1823 int count = 3; |
0 | 1824 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { |
1825 EXCEPTION_MARK; | |
1826 JavaValue result(T_VOID); | |
1142 | 1827 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
0 | 1828 JavaCalls::call_virtual(&result, |
1829 threadObj, thread_klass, | |
2177
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1830 vmSymbols::exit_method_name(), |
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1831 vmSymbols::void_method_signature(), |
0 | 1832 THREAD); |
1833 CLEAR_PENDING_EXCEPTION; | |
1834 } | |
1835 } | |
1836 // notify JVMTI | |
1837 if (JvmtiExport::should_post_thread_life()) { | |
1838 JvmtiExport::post_thread_end(this); | |
1839 } | |
1840 | |
1841 // We have notified the agents that we are exiting, before we go on, | |
1842 // we must check for a pending external suspend request and honor it | |
1843 // in order to not surprise the thread that made the suspend request. | |
1844 while (true) { | |
1845 { | |
1846 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
1847 if (!is_external_suspend()) { | |
1848 set_terminated(_thread_exiting); | |
1849 ThreadService::current_thread_exiting(this); | |
1850 break; | |
1851 } | |
1852 // Implied else: | |
1853 // Things get a little tricky here. We have a pending external | |
1854 // suspend request, but we are holding the SR_lock so we | |
1855 // can't just self-suspend. So we temporarily drop the lock | |
1856 // and then self-suspend. | |
1857 } | |
1858 | |
1859 ThreadBlockInVM tbivm(this); | |
1860 java_suspend_self(); | |
1861 | |
1862 // We're done with this suspend request, but we have to loop around | |
1863 // and check again. Eventually we will get SR_lock without a pending | |
1864 // external suspend request and will be able to mark ourselves as | |
1865 // exiting. | |
1866 } | |
1867 // no more external suspends are allowed at this point | |
1868 } else { | |
1869 // before_exit() has already posted JVMTI THREAD_END events | |
1870 } | |
1871 | |
1872 // Notify waiters on thread object. This has to be done after exit() is called | |
1873 // on the thread (if the thread is the last thread in a daemon ThreadGroup the | |
1874 // group should have the destroyed bit set before waiters are notified). | |
1875 ensure_join(this); | |
1876 assert(!this->has_pending_exception(), "ensure_join should have cleared"); | |
1877 | |
1878 // 6282335 JNI DetachCurrentThread spec states that all Java monitors | |
1879 // held by this thread must be released. A detach operation must only | |
1880 // get here if there are no Java frames on the stack. Therefore, any | |
1881 // owned monitors at this point MUST be JNI-acquired monitors which are | |
1882 // pre-inflated and in the monitor cache. | |
1883 // | |
1884 // ensure_join() ignores IllegalThreadStateExceptions, and so does this. | |
1885 if (exit_type == jni_detach && JNIDetachReleasesMonitors) { | |
1886 assert(!this->has_last_Java_frame(), "detaching with Java frames?"); | |
1887 ObjectSynchronizer::release_monitors_owned_by_thread(this); | |
1888 assert(!this->has_pending_exception(), "release_monitors should have cleared"); | |
1889 } | |
1890 | |
1891 // These things needs to be done while we are still a Java Thread. Make sure that thread | |
1892 // is in a consistent state, in case GC happens | |
1893 assert(_privileged_stack_top == NULL, "must be NULL when we get here"); | |
1894 | |
1895 if (active_handles() != NULL) { | |
1896 JNIHandleBlock* block = active_handles(); | |
1897 set_active_handles(NULL); | |
1898 JNIHandleBlock::release_block(block); | |
1899 } | |
1900 | |
1901 if (free_handle_block() != NULL) { | |
1902 JNIHandleBlock* block = free_handle_block(); | |
1903 set_free_handle_block(NULL); | |
1904 JNIHandleBlock::release_block(block); | |
1905 } | |
1906 | |
1907 // These have to be removed while this is still a valid thread. | |
1908 remove_stack_guard_pages(); | |
1909 | |
1910 if (UseTLAB) { | |
1911 tlab().make_parsable(true); // retire TLAB | |
1912 } | |
1913 | |
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1914 if (JvmtiEnv::environments_might_exist()) { |
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1915 JvmtiExport::cleanup_thread(this); |
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1916 } |
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1917 |
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1918 // We must flush any deferred card marks before removing a thread from |
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1919 // the list of active threads. |
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1920 Universe::heap()->flush_deferred_store_barrier(this); |
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1921 assert(deferred_card_mark().is_empty(), "Should have been flushed"); |
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1922 |
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1923 #if INCLUDE_ALL_GCS |
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1924 // We must flush the G1-related buffers before removing a thread |
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1925 // from the list of active threads. We must do this after any deferred |
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1926 // card marks have been flushed (above) so that any entries that are |
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1927 // added to the thread's dirty card queue as a result are not lost. |
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1928 if (UseG1GC) { |
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1929 flush_barrier_queues(); |
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1930 } |
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1931 #endif // INCLUDE_ALL_GCS |
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1932 |
0 | 1933 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
1934 Threads::remove(this); | |
1935 } | |
1936 | |
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1937 #if INCLUDE_ALL_GCS |
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1938 // Flush G1-related queues. |
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1939 void JavaThread::flush_barrier_queues() { |
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1940 satb_mark_queue().flush(); |
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1941 dirty_card_queue().flush(); |
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1942 } |
1842
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1943 |
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1944 void JavaThread::initialize_queues() { |
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1945 assert(!SafepointSynchronize::is_at_safepoint(), |
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1946 "we should not be at a safepoint"); |
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1947 |
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|
1948 ObjPtrQueue& satb_queue = satb_mark_queue(); |
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1949 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
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1950 // The SATB queue should have been constructed with its active |
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1951 // field set to false. |
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|
1952 assert(!satb_queue.is_active(), "SATB queue should not be active"); |
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|
1953 assert(satb_queue.is_empty(), "SATB queue should be empty"); |
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1954 // If we are creating the thread during a marking cycle, we should |
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1955 // set the active field of the SATB queue to true. |
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1956 if (satb_queue_set.is_active()) { |
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1957 satb_queue.set_active(true); |
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|
1958 } |
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|
1959 |
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|
1960 DirtyCardQueue& dirty_queue = dirty_card_queue(); |
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1961 // The dirty card queue should have been constructed with its |
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1962 // active field set to true. |
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1963 assert(dirty_queue.is_active(), "dirty card queue should be active"); |
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1964 } |
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1965 #endif // INCLUDE_ALL_GCS |
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1966 |
0 | 1967 void JavaThread::cleanup_failed_attach_current_thread() { |
441
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1968 if (get_thread_profiler() != NULL) { |
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1969 get_thread_profiler()->disengage(); |
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1970 ResourceMark rm; |
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1971 get_thread_profiler()->print(get_thread_name()); |
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1972 } |
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1973 |
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1974 if (active_handles() != NULL) { |
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1975 JNIHandleBlock* block = active_handles(); |
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1976 set_active_handles(NULL); |
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1977 JNIHandleBlock::release_block(block); |
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1978 } |
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1979 |
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1980 if (free_handle_block() != NULL) { |
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1981 JNIHandleBlock* block = free_handle_block(); |
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1982 set_free_handle_block(NULL); |
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1983 JNIHandleBlock::release_block(block); |
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1984 } |
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1985 |
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1986 // These have to be removed while this is still a valid thread. |
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1987 remove_stack_guard_pages(); |
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1988 |
441
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1989 if (UseTLAB) { |
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1990 tlab().make_parsable(true); // retire TLAB, if any |
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1991 } |
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1992 |
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1993 #if INCLUDE_ALL_GCS |
441
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1994 if (UseG1GC) { |
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|
1995 flush_barrier_queues(); |
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1996 } |
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1997 #endif // INCLUDE_ALL_GCS |
441
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1998 |
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1999 Threads::remove(this); |
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2000 delete this; |
0 | 2001 } |
2002 | |
2003 | |
441
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2004 |
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2005 |
0 | 2006 JavaThread* JavaThread::active() { |
2007 Thread* thread = ThreadLocalStorage::thread(); | |
2008 assert(thread != NULL, "just checking"); | |
2009 if (thread->is_Java_thread()) { | |
2010 return (JavaThread*) thread; | |
2011 } else { | |
2012 assert(thread->is_VM_thread(), "this must be a vm thread"); | |
2013 VM_Operation* op = ((VMThread*) thread)->vm_operation(); | |
2014 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); | |
2015 assert(ret->is_Java_thread(), "must be a Java thread"); | |
2016 return ret; | |
2017 } | |
2018 } | |
2019 | |
2020 bool JavaThread::is_lock_owned(address adr) const { | |
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|
2021 if (Thread::is_lock_owned(adr)) return true; |
0 | 2022 |
2023 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2024 if (chunk->contains(adr)) return true; | |
2025 } | |
2026 | |
2027 return false; | |
2028 } | |
2029 | |
2030 | |
2031 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { | |
2032 chunk->set_next(monitor_chunks()); | |
2033 set_monitor_chunks(chunk); | |
2034 } | |
2035 | |
2036 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { | |
2037 guarantee(monitor_chunks() != NULL, "must be non empty"); | |
2038 if (monitor_chunks() == chunk) { | |
2039 set_monitor_chunks(chunk->next()); | |
2040 } else { | |
2041 MonitorChunk* prev = monitor_chunks(); | |
2042 while (prev->next() != chunk) prev = prev->next(); | |
2043 prev->set_next(chunk->next()); | |
2044 } | |
2045 } | |
2046 | |
2047 // JVM support. | |
2048 | |
2049 // Note: this function shouldn't block if it's called in | |
2050 // _thread_in_native_trans state (such as from | |
2051 // check_special_condition_for_native_trans()). | |
2052 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { | |
2053 | |
2054 if (has_last_Java_frame() && has_async_condition()) { | |
2055 // If we are at a polling page safepoint (not a poll return) | |
2056 // then we must defer async exception because live registers | |
2057 // will be clobbered by the exception path. Poll return is | |
2058 // ok because the call we a returning from already collides | |
2059 // with exception handling registers and so there is no issue. | |
2060 // (The exception handling path kills call result registers but | |
2061 // this is ok since the exception kills the result anyway). | |
2062 | |
2063 if (is_at_poll_safepoint()) { | |
2064 // if the code we are returning to has deoptimized we must defer | |
2065 // the exception otherwise live registers get clobbered on the | |
2066 // exception path before deoptimization is able to retrieve them. | |
2067 // | |
2068 RegisterMap map(this, false); | |
2069 frame caller_fr = last_frame().sender(&map); | |
2070 assert(caller_fr.is_compiled_frame(), "what?"); | |
2071 if (caller_fr.is_deoptimized_frame()) { | |
2072 if (TraceExceptions) { | |
2073 ResourceMark rm; | |
2074 tty->print_cr("deferred async exception at compiled safepoint"); | |
2075 } | |
2076 return; | |
2077 } | |
2078 } | |
2079 } | |
2080 | |
2081 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); | |
2082 if (condition == _no_async_condition) { | |
2083 // Conditions have changed since has_special_runtime_exit_condition() | |
2084 // was called: | |
2085 // - if we were here only because of an external suspend request, | |
2086 // then that was taken care of above (or cancelled) so we are done | |
2087 // - if we were here because of another async request, then it has | |
2088 // been cleared between the has_special_runtime_exit_condition() | |
2089 // and now so again we are done | |
2090 return; | |
2091 } | |
2092 | |
2093 // Check for pending async. exception | |
2094 if (_pending_async_exception != NULL) { | |
2095 // Only overwrite an already pending exception, if it is not a threadDeath. | |
1142 | 2096 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2097 |
2098 // We cannot call Exceptions::_throw(...) here because we cannot block | |
2099 set_pending_exception(_pending_async_exception, __FILE__, __LINE__); | |
2100 | |
2101 if (TraceExceptions) { | |
2102 ResourceMark rm; | |
2103 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); | |
2104 if (has_last_Java_frame() ) { | |
2105 frame f = last_frame(); | |
2106 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); | |
2107 } | |
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2108 tty->print_cr(" of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2109 } |
2110 _pending_async_exception = NULL; | |
2111 clear_has_async_exception(); | |
2112 } | |
2113 } | |
2114 | |
2115 if (check_unsafe_error && | |
2116 condition == _async_unsafe_access_error && !has_pending_exception()) { | |
2117 condition = _no_async_condition; // done | |
2118 switch (thread_state()) { | |
2119 case _thread_in_vm: | |
2120 { | |
2121 JavaThread* THREAD = this; | |
2122 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2123 } | |
2124 case _thread_in_native: | |
2125 { | |
2126 ThreadInVMfromNative tiv(this); | |
2127 JavaThread* THREAD = this; | |
2128 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
2129 } | |
2130 case _thread_in_Java: | |
2131 { | |
2132 ThreadInVMfromJava tiv(this); | |
2133 JavaThread* THREAD = this; | |
2134 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); | |
2135 } | |
2136 default: | |
2137 ShouldNotReachHere(); | |
2138 } | |
2139 } | |
2140 | |
2141 assert(condition == _no_async_condition || has_pending_exception() || | |
2142 (!check_unsafe_error && condition == _async_unsafe_access_error), | |
2143 "must have handled the async condition, if no exception"); | |
2144 } | |
2145 | |
2146 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { | |
2147 // | |
2148 // Check for pending external suspend. Internal suspend requests do | |
2149 // not use handle_special_runtime_exit_condition(). | |
2150 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2151 // thread is not the current thread. In older versions of jdbx, jdbx | |
2152 // threads could call into the VM with another thread's JNIEnv so we | |
2153 // can be here operating on behalf of a suspended thread (4432884). | |
2154 bool do_self_suspend = is_external_suspend_with_lock(); | |
2155 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { | |
2156 // | |
2157 // Because thread is external suspended the safepoint code will count | |
2158 // thread as at a safepoint. This can be odd because we can be here | |
2159 // as _thread_in_Java which would normally transition to _thread_blocked | |
2160 // at a safepoint. We would like to mark the thread as _thread_blocked | |
2161 // before calling java_suspend_self like all other callers of it but | |
2162 // we must then observe proper safepoint protocol. (We can't leave | |
2163 // _thread_blocked with a safepoint in progress). However we can be | |
2164 // here as _thread_in_native_trans so we can't use a normal transition | |
2165 // constructor/destructor pair because they assert on that type of | |
2166 // transition. We could do something like: | |
2167 // | |
2168 // JavaThreadState state = thread_state(); | |
2169 // set_thread_state(_thread_in_vm); | |
2170 // { | |
2171 // ThreadBlockInVM tbivm(this); | |
2172 // java_suspend_self() | |
2173 // } | |
2174 // set_thread_state(_thread_in_vm_trans); | |
2175 // if (safepoint) block; | |
2176 // set_thread_state(state); | |
2177 // | |
2178 // but that is pretty messy. Instead we just go with the way the | |
2179 // code has worked before and note that this is the only path to | |
2180 // java_suspend_self that doesn't put the thread in _thread_blocked | |
2181 // mode. | |
2182 | |
2183 frame_anchor()->make_walkable(this); | |
2184 java_suspend_self(); | |
2185 | |
2186 // We might be here for reasons in addition to the self-suspend request | |
2187 // so check for other async requests. | |
2188 } | |
2189 | |
2190 if (check_asyncs) { | |
2191 check_and_handle_async_exceptions(); | |
2192 } | |
2193 } | |
2194 | |
2195 void JavaThread::send_thread_stop(oop java_throwable) { | |
2196 assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); | |
2197 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); | |
2198 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
2199 | |
2200 // Do not throw asynchronous exceptions against the compiler thread | |
2201 // (the compiler thread should not be a Java thread -- fix in 1.4.2) | |
2202 if (is_Compiler_thread()) return; | |
2203 | |
2204 { | |
2205 // Actually throw the Throwable against the target Thread - however | |
2206 // only if there is no thread death exception installed already. | |
1142 | 2207 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
0 | 2208 // If the topmost frame is a runtime stub, then we are calling into |
2209 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) | |
2210 // must deoptimize the caller before continuing, as the compiled exception handler table | |
2211 // may not be valid | |
2212 if (has_last_Java_frame()) { | |
2213 frame f = last_frame(); | |
2214 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { | |
2215 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2216 RegisterMap reg_map(this, UseBiasedLocking); | |
2217 frame compiled_frame = f.sender(®_map); | |
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2218 if (!StressCompiledExceptionHandlers && compiled_frame.can_be_deoptimized()) { |
0 | 2219 Deoptimization::deoptimize(this, compiled_frame, ®_map); |
2220 } | |
2221 } | |
2222 } | |
2223 | |
2224 // Set async. pending exception in thread. | |
2225 set_pending_async_exception(java_throwable); | |
2226 | |
2227 if (TraceExceptions) { | |
2228 ResourceMark rm; | |
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2229 tty->print_cr("Pending Async. exception installed of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
0 | 2230 } |
2231 // for AbortVMOnException flag | |
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2232 NOT_PRODUCT(Exceptions::debug_check_abort(InstanceKlass::cast(_pending_async_exception->klass())->external_name())); |
0 | 2233 } |
2234 } | |
2235 | |
2236 | |
2237 // Interrupt thread so it will wake up from a potential wait() | |
2238 Thread::interrupt(this); | |
2239 } | |
2240 | |
2241 // External suspension mechanism. | |
2242 // | |
2243 // Tell the VM to suspend a thread when ever it knows that it does not hold on | |
2244 // to any VM_locks and it is at a transition | |
2245 // Self-suspension will happen on the transition out of the vm. | |
2246 // Catch "this" coming in from JNIEnv pointers when the thread has been freed | |
2247 // | |
2248 // Guarantees on return: | |
2249 // + Target thread will not execute any new bytecode (that's why we need to | |
2250 // force a safepoint) | |
2251 // + Target thread will not enter any new monitors | |
2252 // | |
2253 void JavaThread::java_suspend() { | |
2254 { MutexLocker mu(Threads_lock); | |
2255 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { | |
2256 return; | |
2257 } | |
2258 } | |
2259 | |
2260 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2261 if (!is_external_suspend()) { | |
2262 // a racing resume has cancelled us; bail out now | |
2263 return; | |
2264 } | |
2265 | |
2266 // suspend is done | |
2267 uint32_t debug_bits = 0; | |
2268 // Warning: is_ext_suspend_completed() may temporarily drop the | |
2269 // SR_lock to allow the thread to reach a stable thread state if | |
2270 // it is currently in a transient thread state. | |
2271 if (is_ext_suspend_completed(false /* !called_by_wait */, | |
2272 SuspendRetryDelay, &debug_bits) ) { | |
2273 return; | |
2274 } | |
2275 } | |
2276 | |
2277 VM_ForceSafepoint vm_suspend; | |
2278 VMThread::execute(&vm_suspend); | |
2279 } | |
2280 | |
2281 // Part II of external suspension. | |
2282 // A JavaThread self suspends when it detects a pending external suspend | |
2283 // request. This is usually on transitions. It is also done in places | |
2284 // where continuing to the next transition would surprise the caller, | |
2285 // e.g., monitor entry. | |
2286 // | |
2287 // Returns the number of times that the thread self-suspended. | |
2288 // | |
2289 // Note: DO NOT call java_suspend_self() when you just want to block current | |
2290 // thread. java_suspend_self() is the second stage of cooperative | |
2291 // suspension for external suspend requests and should only be used | |
2292 // to complete an external suspend request. | |
2293 // | |
2294 int JavaThread::java_suspend_self() { | |
2295 int ret = 0; | |
2296 | |
2297 // we are in the process of exiting so don't suspend | |
2298 if (is_exiting()) { | |
2299 clear_external_suspend(); | |
2300 return ret; | |
2301 } | |
2302 | |
2303 assert(_anchor.walkable() || | |
2304 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), | |
2305 "must have walkable stack"); | |
2306 | |
2307 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2308 | |
979 | 2309 assert(!this->is_ext_suspended(), |
0 | 2310 "a thread trying to self-suspend should not already be suspended"); |
2311 | |
2312 if (this->is_suspend_equivalent()) { | |
2313 // If we are self-suspending as a result of the lifting of a | |
2314 // suspend equivalent condition, then the suspend_equivalent | |
2315 // flag is not cleared until we set the ext_suspended flag so | |
2316 // that wait_for_ext_suspend_completion() returns consistent | |
2317 // results. | |
2318 this->clear_suspend_equivalent(); | |
2319 } | |
2320 | |
2321 // A racing resume may have cancelled us before we grabbed SR_lock | |
2322 // above. Or another external suspend request could be waiting for us | |
2323 // by the time we return from SR_lock()->wait(). The thread | |
2324 // that requested the suspension may already be trying to walk our | |
2325 // stack and if we return now, we can change the stack out from under | |
2326 // it. This would be a "bad thing (TM)" and cause the stack walker | |
2327 // to crash. We stay self-suspended until there are no more pending | |
2328 // external suspend requests. | |
2329 while (is_external_suspend()) { | |
2330 ret++; | |
2331 this->set_ext_suspended(); | |
2332 | |
2333 // _ext_suspended flag is cleared by java_resume() | |
2334 while (is_ext_suspended()) { | |
2335 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); | |
2336 } | |
2337 } | |
2338 | |
2339 return ret; | |
2340 } | |
2341 | |
2342 #ifdef ASSERT | |
2343 // verify the JavaThread has not yet been published in the Threads::list, and | |
2344 // hence doesn't need protection from concurrent access at this stage | |
2345 void JavaThread::verify_not_published() { | |
2346 if (!Threads_lock->owned_by_self()) { | |
2347 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); | |
2348 assert( !Threads::includes(this), | |
2349 "java thread shouldn't have been published yet!"); | |
2350 } | |
2351 else { | |
2352 assert( !Threads::includes(this), | |
2353 "java thread shouldn't have been published yet!"); | |
2354 } | |
2355 } | |
2356 #endif | |
2357 | |
2358 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2359 // progress or when _suspend_flags is non-zero. | |
2360 // Current thread needs to self-suspend if there is a suspend request and/or | |
2361 // block if a safepoint is in progress. | |
2362 // Async exception ISN'T checked. | |
2363 // Note only the ThreadInVMfromNative transition can call this function | |
2364 // directly and when thread state is _thread_in_native_trans | |
2365 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { | |
2366 assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); | |
2367 | |
2368 JavaThread *curJT = JavaThread::current(); | |
2369 bool do_self_suspend = thread->is_external_suspend(); | |
2370 | |
2371 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); | |
2372 | |
2373 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
2374 // thread is not the current thread. In older versions of jdbx, jdbx | |
2375 // threads could call into the VM with another thread's JNIEnv so we | |
2376 // can be here operating on behalf of a suspended thread (4432884). | |
2377 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { | |
2378 JavaThreadState state = thread->thread_state(); | |
2379 | |
2380 // We mark this thread_blocked state as a suspend-equivalent so | |
2381 // that a caller to is_ext_suspend_completed() won't be confused. | |
2382 // The suspend-equivalent state is cleared by java_suspend_self(). | |
2383 thread->set_suspend_equivalent(); | |
2384 | |
2385 // If the safepoint code sees the _thread_in_native_trans state, it will | |
2386 // wait until the thread changes to other thread state. There is no | |
2387 // guarantee on how soon we can obtain the SR_lock and complete the | |
2388 // self-suspend request. It would be a bad idea to let safepoint wait for | |
2389 // too long. Temporarily change the state to _thread_blocked to | |
2390 // let the VM thread know that this thread is ready for GC. The problem | |
2391 // of changing thread state is that safepoint could happen just after | |
2392 // java_suspend_self() returns after being resumed, and VM thread will | |
2393 // see the _thread_blocked state. We must check for safepoint | |
2394 // after restoring the state and make sure we won't leave while a safepoint | |
2395 // is in progress. | |
2396 thread->set_thread_state(_thread_blocked); | |
2397 thread->java_suspend_self(); | |
2398 thread->set_thread_state(state); | |
2399 // Make sure new state is seen by VM thread | |
2400 if (os::is_MP()) { | |
2401 if (UseMembar) { | |
2402 // Force a fence between the write above and read below | |
2403 OrderAccess::fence(); | |
2404 } else { | |
2405 // Must use this rather than serialization page in particular on Windows | |
2406 InterfaceSupport::serialize_memory(thread); | |
2407 } | |
2408 } | |
2409 } | |
2410 | |
2411 if (SafepointSynchronize::do_call_back()) { | |
2412 // If we are safepointing, then block the caller which may not be | |
2413 // the same as the target thread (see above). | |
2414 SafepointSynchronize::block(curJT); | |
2415 } | |
2416 | |
2417 if (thread->is_deopt_suspend()) { | |
2418 thread->clear_deopt_suspend(); | |
2419 RegisterMap map(thread, false); | |
2420 frame f = thread->last_frame(); | |
2421 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { | |
2422 f = f.sender(&map); | |
2423 } | |
2424 if (f.id() == thread->must_deopt_id()) { | |
2425 thread->clear_must_deopt_id(); | |
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2426 f.deoptimize(thread); |
0 | 2427 } else { |
2428 fatal("missed deoptimization!"); | |
2429 } | |
2430 } | |
2431 } | |
2432 | |
2433 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
2434 // progress or when _suspend_flags is non-zero. | |
2435 // Current thread needs to self-suspend if there is a suspend request and/or | |
2436 // block if a safepoint is in progress. | |
2437 // Also check for pending async exception (not including unsafe access error). | |
2438 // Note only the native==>VM/Java barriers can call this function and when | |
2439 // thread state is _thread_in_native_trans. | |
2440 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { | |
2441 check_safepoint_and_suspend_for_native_trans(thread); | |
2442 | |
2443 if (thread->has_async_exception()) { | |
2444 // We are in _thread_in_native_trans state, don't handle unsafe | |
2445 // access error since that may block. | |
2446 thread->check_and_handle_async_exceptions(false); | |
2447 } | |
2448 } | |
2449 | |
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2450 // This is a variant of the normal |
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2451 // check_special_condition_for_native_trans with slightly different |
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2452 // semantics for use by critical native wrappers. It does all the |
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2453 // normal checks but also performs the transition back into |
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2454 // thread_in_Java state. This is required so that critical natives |
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2455 // can potentially block and perform a GC if they are the last thread |
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2456 // exiting the GC_locker. |
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2457 void JavaThread::check_special_condition_for_native_trans_and_transition(JavaThread *thread) { |
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2458 check_special_condition_for_native_trans(thread); |
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2459 |
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2460 // Finish the transition |
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2461 thread->set_thread_state(_thread_in_Java); |
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2462 |
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2463 if (thread->do_critical_native_unlock()) { |
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2464 ThreadInVMfromJavaNoAsyncException tiv(thread); |
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2465 GC_locker::unlock_critical(thread); |
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2466 thread->clear_critical_native_unlock(); |
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2467 } |
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2468 } |
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2469 |
0 | 2470 // We need to guarantee the Threads_lock here, since resumes are not |
2471 // allowed during safepoint synchronization | |
2472 // Can only resume from an external suspension | |
2473 void JavaThread::java_resume() { | |
2474 assert_locked_or_safepoint(Threads_lock); | |
2475 | |
2476 // Sanity check: thread is gone, has started exiting or the thread | |
2477 // was not externally suspended. | |
2478 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { | |
2479 return; | |
2480 } | |
2481 | |
2482 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
2483 | |
2484 clear_external_suspend(); | |
2485 | |
2486 if (is_ext_suspended()) { | |
2487 clear_ext_suspended(); | |
2488 SR_lock()->notify_all(); | |
2489 } | |
2490 } | |
2491 | |
2492 void JavaThread::create_stack_guard_pages() { | |
2493 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; | |
2494 address low_addr = stack_base() - stack_size(); | |
2495 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2496 | |
2497 int allocate = os::allocate_stack_guard_pages(); | |
2498 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); | |
2499 | |
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2500 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
0 | 2501 warning("Attempt to allocate stack guard pages failed."); |
2502 return; | |
2503 } | |
2504 | |
2505 if (os::guard_memory((char *) low_addr, len)) { | |
2506 _stack_guard_state = stack_guard_enabled; | |
2507 } else { | |
2508 warning("Attempt to protect stack guard pages failed."); | |
2509 if (os::uncommit_memory((char *) low_addr, len)) { | |
2510 warning("Attempt to deallocate stack guard pages failed."); | |
2511 } | |
2512 } | |
2513 } | |
2514 | |
2515 void JavaThread::remove_stack_guard_pages() { | |
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2516 assert(Thread::current() == this, "from different thread"); |
0 | 2517 if (_stack_guard_state == stack_guard_unused) return; |
2518 address low_addr = stack_base() - stack_size(); | |
2519 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
2520 | |
2521 if (os::allocate_stack_guard_pages()) { | |
1320
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2522 if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
0 | 2523 _stack_guard_state = stack_guard_unused; |
2524 } else { | |
2525 warning("Attempt to deallocate stack guard pages failed."); | |
2526 } | |
2527 } else { | |
2528 if (_stack_guard_state == stack_guard_unused) return; | |
2529 if (os::unguard_memory((char *) low_addr, len)) { | |
2530 _stack_guard_state = stack_guard_unused; | |
2531 } else { | |
2532 warning("Attempt to unprotect stack guard pages failed."); | |
2533 } | |
2534 } | |
2535 } | |
2536 | |
2537 void JavaThread::enable_stack_yellow_zone() { | |
2538 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2539 assert(_stack_guard_state != stack_guard_enabled, "already enabled"); | |
2540 | |
2541 // The base notation is from the stacks point of view, growing downward. | |
2542 // We need to adjust it to work correctly with guard_memory() | |
2543 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2544 | |
2545 guarantee(base < stack_base(),"Error calculating stack yellow zone"); | |
2546 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); | |
2547 | |
2548 if (os::guard_memory((char *) base, stack_yellow_zone_size())) { | |
2549 _stack_guard_state = stack_guard_enabled; | |
2550 } else { | |
2551 warning("Attempt to guard stack yellow zone failed."); | |
2552 } | |
2553 enable_register_stack_guard(); | |
2554 } | |
2555 | |
2556 void JavaThread::disable_stack_yellow_zone() { | |
2557 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2558 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); | |
2559 | |
2560 // Simply return if called for a thread that does not use guard pages. | |
2561 if (_stack_guard_state == stack_guard_unused) return; | |
2562 | |
2563 // The base notation is from the stacks point of view, growing downward. | |
2564 // We need to adjust it to work correctly with guard_memory() | |
2565 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
2566 | |
2567 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { | |
2568 _stack_guard_state = stack_guard_yellow_disabled; | |
2569 } else { | |
2570 warning("Attempt to unguard stack yellow zone failed."); | |
2571 } | |
2572 disable_register_stack_guard(); | |
2573 } | |
2574 | |
2575 void JavaThread::enable_stack_red_zone() { | |
2576 // The base notation is from the stacks point of view, growing downward. | |
2577 // We need to adjust it to work correctly with guard_memory() | |
2578 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2579 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2580 | |
2581 guarantee(base < stack_base(),"Error calculating stack red zone"); | |
2582 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); | |
2583 | |
2584 if(!os::guard_memory((char *) base, stack_red_zone_size())) { | |
2585 warning("Attempt to guard stack red zone failed."); | |
2586 } | |
2587 } | |
2588 | |
2589 void JavaThread::disable_stack_red_zone() { | |
2590 // The base notation is from the stacks point of view, growing downward. | |
2591 // We need to adjust it to work correctly with guard_memory() | |
2592 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
2593 address base = stack_red_zone_base() - stack_red_zone_size(); | |
2594 if (!os::unguard_memory((char *)base, stack_red_zone_size())) { | |
2595 warning("Attempt to unguard stack red zone failed."); | |
2596 } | |
2597 } | |
2598 | |
2599 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { | |
2600 // ignore is there is no stack | |
2601 if (!has_last_Java_frame()) return; | |
2602 // traverse the stack frames. Starts from top frame. | |
2603 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2604 frame* fr = fst.current(); | |
2605 f(fr, fst.register_map()); | |
2606 } | |
2607 } | |
2608 | |
2609 | |
2610 #ifndef PRODUCT | |
2611 // Deoptimization | |
2612 // Function for testing deoptimization | |
2613 void JavaThread::deoptimize() { | |
2614 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2615 StackFrameStream fst(this, UseBiasedLocking); | |
2616 bool deopt = false; // Dump stack only if a deopt actually happens. | |
2617 bool only_at = strlen(DeoptimizeOnlyAt) > 0; | |
2618 // Iterate over all frames in the thread and deoptimize | |
2619 for(; !fst.is_done(); fst.next()) { | |
2620 if(fst.current()->can_be_deoptimized()) { | |
2621 | |
2622 if (only_at) { | |
2623 // Deoptimize only at particular bcis. DeoptimizeOnlyAt | |
2624 // consists of comma or carriage return separated numbers so | |
2625 // search for the current bci in that string. | |
2626 address pc = fst.current()->pc(); | |
2627 nmethod* nm = (nmethod*) fst.current()->cb(); | |
2628 ScopeDesc* sd = nm->scope_desc_at( pc); | |
2629 char buffer[8]; | |
2630 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); | |
2631 size_t len = strlen(buffer); | |
2632 const char * found = strstr(DeoptimizeOnlyAt, buffer); | |
2633 while (found != NULL) { | |
2634 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && | |
2635 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { | |
2636 // Check that the bci found is bracketed by terminators. | |
2637 break; | |
2638 } | |
2639 found = strstr(found + 1, buffer); | |
2640 } | |
2641 if (!found) { | |
2642 continue; | |
2643 } | |
2644 } | |
2645 | |
2646 if (DebugDeoptimization && !deopt) { | |
2647 deopt = true; // One-time only print before deopt | |
2648 tty->print_cr("[BEFORE Deoptimization]"); | |
2649 trace_frames(); | |
2650 trace_stack(); | |
2651 } | |
2652 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
2653 } | |
2654 } | |
2655 | |
2656 if (DebugDeoptimization && deopt) { | |
2657 tty->print_cr("[AFTER Deoptimization]"); | |
2658 trace_frames(); | |
2659 } | |
2660 } | |
2661 | |
2662 | |
2663 // Make zombies | |
2664 void JavaThread::make_zombies() { | |
2665 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
2666 if (fst.current()->can_be_deoptimized()) { | |
2667 // it is a Java nmethod | |
2668 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); | |
2669 nm->make_not_entrant(); | |
2670 } | |
2671 } | |
2672 } | |
2673 #endif // PRODUCT | |
2674 | |
2675 | |
2676 void JavaThread::deoptimized_wrt_marked_nmethods() { | |
2677 if (!has_last_Java_frame()) return; | |
2678 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
2679 StackFrameStream fst(this, UseBiasedLocking); | |
2680 for(; !fst.is_done(); fst.next()) { | |
2681 if (fst.current()->should_be_deoptimized()) { | |
6843 | 2682 if (LogCompilation && xtty != NULL) { |
2683 nmethod* nm = fst.current()->cb()->as_nmethod_or_null(); | |
2684 xtty->elem("deoptimized thread='" UINTX_FORMAT "' compile_id='%d'", | |
2685 this->name(), nm != NULL ? nm->compile_id() : -1); | |
2686 } | |
2687 | |
0 | 2688 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
2689 } | |
2690 } | |
2691 } | |
2692 | |
2693 | |
2694 // GC support | |
2695 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } | |
2696 | |
2697 void JavaThread::gc_epilogue() { | |
2698 frames_do(frame_gc_epilogue); | |
2699 } | |
2700 | |
2701 | |
2702 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } | |
2703 | |
2704 void JavaThread::gc_prologue() { | |
2705 frames_do(frame_gc_prologue); | |
2706 } | |
2707 | |
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2708 // If the caller is a NamedThread, then remember, in the current scope, |
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2709 // the given JavaThread in its _processed_thread field. |
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2710 class RememberProcessedThread: public StackObj { |
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2711 NamedThread* _cur_thr; |
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|
2712 public: |
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2713 RememberProcessedThread(JavaThread* jthr) { |
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2714 Thread* thread = Thread::current(); |
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2715 if (thread->is_Named_thread()) { |
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2716 _cur_thr = (NamedThread *)thread; |
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2717 _cur_thr->set_processed_thread(jthr); |
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2718 } else { |
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2719 _cur_thr = NULL; |
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|
2720 } |
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|
2721 } |
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2722 |
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2723 ~RememberProcessedThread() { |
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2724 if (_cur_thr) { |
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2725 _cur_thr->set_processed_thread(NULL); |
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|
2726 } |
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|
2727 } |
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2728 }; |
0 | 2729 |
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2730 void JavaThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
1166 | 2731 // Verify that the deferred card marks have been flushed. |
2732 assert(deferred_card_mark().is_empty(), "Should be empty during GC"); | |
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2733 |
0 | 2734 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
2735 // since there may be more than one thread using each ThreadProfiler. | |
2736 | |
2737 // Traverse the GCHandles | |
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2738 Thread::oops_do(f, cld_f, cf); |
0 | 2739 |
2740 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2741 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2742 | |
2743 if (has_last_Java_frame()) { | |
1119
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2744 // Record JavaThread to GC thread |
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2745 RememberProcessedThread rpt(this); |
0 | 2746 |
2747 // Traverse the privileged stack | |
2748 if (_privileged_stack_top != NULL) { | |
2749 _privileged_stack_top->oops_do(f); | |
2750 } | |
2751 | |
2752 // traverse the registered growable array | |
2753 if (_array_for_gc != NULL) { | |
2754 for (int index = 0; index < _array_for_gc->length(); index++) { | |
2755 f->do_oop(_array_for_gc->adr_at(index)); | |
2756 } | |
2757 } | |
2758 | |
2759 // Traverse the monitor chunks | |
2760 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
2761 chunk->oops_do(f); | |
2762 } | |
2763 | |
2764 // Traverse the execution stack | |
2765 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
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2766 fst.current()->oops_do(f, cld_f, cf, fst.register_map()); |
0 | 2767 } |
2768 } | |
2769 | |
2770 // callee_target is never live across a gc point so NULL it here should | |
2771 // it still contain a methdOop. | |
2772 | |
2773 set_callee_target(NULL); | |
2774 | |
2775 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); | |
2776 // If we have deferred set_locals there might be oops waiting to be | |
2777 // written | |
2778 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); | |
2779 if (list != NULL) { | |
2780 for (int i = 0; i < list->length(); i++) { | |
2781 list->at(i)->oops_do(f); | |
2782 } | |
2783 } | |
2784 | |
2785 // Traverse instance variables at the end since the GC may be moving things | |
2786 // around using this function | |
2787 f->do_oop((oop*) &_threadObj); | |
2788 f->do_oop((oop*) &_vm_result); | |
2789 f->do_oop((oop*) &_exception_oop); | |
2790 f->do_oop((oop*) &_pending_async_exception); | |
2791 | |
2792 if (jvmti_thread_state() != NULL) { | |
2793 jvmti_thread_state()->oops_do(f); | |
2794 } | |
2795 } | |
2796 | |
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2797 void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
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2798 Thread::nmethods_do(cf); // (super method is a no-op) |
0 | 2799 |
2800 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
2801 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
2802 | |
2803 if (has_last_Java_frame()) { | |
2804 // Traverse the execution stack | |
2805 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
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|
2806 fst.current()->nmethods_do(cf); |
0 | 2807 } |
2808 } | |
2809 } | |
2810 | |
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2811 void JavaThread::metadata_do(void f(Metadata*)) { |
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2812 Thread::metadata_do(f); |
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2813 if (has_last_Java_frame()) { |
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2814 // Traverse the execution stack to call f() on the methods in the stack |
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2815 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
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2816 fst.current()->metadata_do(f); |
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|
2817 } |
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|
2818 } else if (is_Compiler_thread()) { |
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2819 // need to walk ciMetadata in current compile tasks to keep alive. |
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2820 CompilerThread* ct = (CompilerThread*)this; |
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2821 if (ct->env() != NULL) { |
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2822 ct->env()->metadata_do(f); |
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2823 } |
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2824 } |
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2825 } |
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2826 |
0 | 2827 // Printing |
2828 const char* _get_thread_state_name(JavaThreadState _thread_state) { | |
2829 switch (_thread_state) { | |
2830 case _thread_uninitialized: return "_thread_uninitialized"; | |
2831 case _thread_new: return "_thread_new"; | |
2832 case _thread_new_trans: return "_thread_new_trans"; | |
2833 case _thread_in_native: return "_thread_in_native"; | |
2834 case _thread_in_native_trans: return "_thread_in_native_trans"; | |
2835 case _thread_in_vm: return "_thread_in_vm"; | |
2836 case _thread_in_vm_trans: return "_thread_in_vm_trans"; | |
2837 case _thread_in_Java: return "_thread_in_Java"; | |
2838 case _thread_in_Java_trans: return "_thread_in_Java_trans"; | |
2839 case _thread_blocked: return "_thread_blocked"; | |
2840 case _thread_blocked_trans: return "_thread_blocked_trans"; | |
2841 default: return "unknown thread state"; | |
2842 } | |
2843 } | |
2844 | |
2845 #ifndef PRODUCT | |
2846 void JavaThread::print_thread_state_on(outputStream *st) const { | |
2847 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); | |
2848 }; | |
2849 void JavaThread::print_thread_state() const { | |
2850 print_thread_state_on(tty); | |
2851 }; | |
2852 #endif // PRODUCT | |
2853 | |
2854 // Called by Threads::print() for VM_PrintThreads operation | |
2855 void JavaThread::print_on(outputStream *st) const { | |
2856 st->print("\"%s\" ", get_thread_name()); | |
2857 oop thread_oop = threadObj(); | |
6766 | 2858 if (thread_oop != NULL) { |
2859 st->print("#" INT64_FORMAT " ", java_lang_Thread::thread_id(thread_oop)); | |
2860 if (java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); | |
2861 st->print("prio=%d ", java_lang_Thread::priority(thread_oop)); | |
2862 } | |
0 | 2863 Thread::print_on(st); |
2864 // print guess for valid stack memory region (assume 4K pages); helps lock debugging | |
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2865 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
0 | 2866 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
2867 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); | |
2868 } | |
2869 #ifndef PRODUCT | |
2870 print_thread_state_on(st); | |
2871 _safepoint_state->print_on(st); | |
2872 #endif // PRODUCT | |
2873 } | |
2874 | |
2875 // Called by fatal error handler. The difference between this and | |
2876 // JavaThread::print() is that we can't grab lock or allocate memory. | |
2877 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { | |
2878 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); | |
2879 oop thread_obj = threadObj(); | |
2880 if (thread_obj != NULL) { | |
2881 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); | |
2882 } | |
2883 st->print(" ["); | |
2884 st->print("%s", _get_thread_state_name(_thread_state)); | |
2885 if (osthread()) { | |
2886 st->print(", id=%d", osthread()->thread_id()); | |
2887 } | |
2888 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", | |
2889 _stack_base - _stack_size, _stack_base); | |
2890 st->print("]"); | |
2891 return; | |
2892 } | |
2893 | |
2894 // Verification | |
2895 | |
2896 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } | |
2897 | |
2898 void JavaThread::verify() { | |
2899 // Verify oops in the thread. | |
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2900 oops_do(&VerifyOopClosure::verify_oop, NULL, NULL); |
0 | 2901 |
2902 // Verify the stack frames. | |
2903 frames_do(frame_verify); | |
2904 } | |
2905 | |
2906 // CR 6300358 (sub-CR 2137150) | |
2907 // Most callers of this method assume that it can't return NULL but a | |
2908 // thread may not have a name whilst it is in the process of attaching to | |
2909 // the VM - see CR 6412693, and there are places where a JavaThread can be | |
2910 // seen prior to having it's threadObj set (eg JNI attaching threads and | |
2911 // if vm exit occurs during initialization). These cases can all be accounted | |
2912 // for such that this method never returns NULL. | |
2913 const char* JavaThread::get_thread_name() const { | |
2914 #ifdef ASSERT | |
2915 // early safepoints can hit while current thread does not yet have TLS | |
2916 if (!SafepointSynchronize::is_at_safepoint()) { | |
2917 Thread *cur = Thread::current(); | |
2918 if (!(cur->is_Java_thread() && cur == this)) { | |
2919 // Current JavaThreads are allowed to get their own name without | |
2920 // the Threads_lock. | |
2921 assert_locked_or_safepoint(Threads_lock); | |
2922 } | |
2923 } | |
2924 #endif // ASSERT | |
2925 return get_thread_name_string(); | |
2926 } | |
2927 | |
2928 // Returns a non-NULL representation of this thread's name, or a suitable | |
2929 // descriptive string if there is no set name | |
2930 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { | |
2931 const char* name_str; | |
2932 oop thread_obj = threadObj(); | |
2933 if (thread_obj != NULL) { | |
2934 typeArrayOop name = java_lang_Thread::name(thread_obj); | |
2935 if (name != NULL) { | |
2936 if (buf == NULL) { | |
2937 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2938 } | |
2939 else { | |
2940 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); | |
2941 } | |
2942 } | |
4006 | 2943 else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
0 | 2944 name_str = "<no-name - thread is attaching>"; |
2945 } | |
2946 else { | |
2947 name_str = Thread::name(); | |
2948 } | |
2949 } | |
2950 else { | |
2951 name_str = Thread::name(); | |
2952 } | |
2953 assert(name_str != NULL, "unexpected NULL thread name"); | |
2954 return name_str; | |
2955 } | |
2956 | |
2957 | |
2958 const char* JavaThread::get_threadgroup_name() const { | |
2959 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
2960 oop thread_obj = threadObj(); | |
2961 if (thread_obj != NULL) { | |
2962 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
2963 if (thread_group != NULL) { | |
2964 typeArrayOop name = java_lang_ThreadGroup::name(thread_group); | |
2965 // ThreadGroup.name can be null | |
2966 if (name != NULL) { | |
2967 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2968 return str; | |
2969 } | |
2970 } | |
2971 } | |
2972 return NULL; | |
2973 } | |
2974 | |
2975 const char* JavaThread::get_parent_name() const { | |
2976 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
2977 oop thread_obj = threadObj(); | |
2978 if (thread_obj != NULL) { | |
2979 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
2980 if (thread_group != NULL) { | |
2981 oop parent = java_lang_ThreadGroup::parent(thread_group); | |
2982 if (parent != NULL) { | |
2983 typeArrayOop name = java_lang_ThreadGroup::name(parent); | |
2984 // ThreadGroup.name can be null | |
2985 if (name != NULL) { | |
2986 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
2987 return str; | |
2988 } | |
2989 } | |
2990 } | |
2991 } | |
2992 return NULL; | |
2993 } | |
2994 | |
2995 ThreadPriority JavaThread::java_priority() const { | |
2996 oop thr_oop = threadObj(); | |
2997 if (thr_oop == NULL) return NormPriority; // Bootstrapping | |
2998 ThreadPriority priority = java_lang_Thread::priority(thr_oop); | |
2999 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
3000 return priority; | |
3001 } | |
3002 | |
3003 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { | |
3004 | |
3005 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
3006 // Link Java Thread object <-> C++ Thread | |
3007 | |
3008 // Get the C++ thread object (an oop) from the JNI handle (a jthread) | |
3009 // and put it into a new Handle. The Handle "thread_oop" can then | |
3010 // be used to pass the C++ thread object to other methods. | |
3011 | |
3012 // Set the Java level thread object (jthread) field of the | |
3013 // new thread (a JavaThread *) to C++ thread object using the | |
3014 // "thread_oop" handle. | |
3015 | |
3016 // Set the thread field (a JavaThread *) of the | |
3017 // oop representing the java_lang_Thread to the new thread (a JavaThread *). | |
3018 | |
3019 Handle thread_oop(Thread::current(), | |
3020 JNIHandles::resolve_non_null(jni_thread)); | |
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3021 assert(InstanceKlass::cast(thread_oop->klass())->is_linked(), |
0 | 3022 "must be initialized"); |
3023 set_threadObj(thread_oop()); | |
3024 java_lang_Thread::set_thread(thread_oop(), this); | |
3025 | |
3026 if (prio == NoPriority) { | |
3027 prio = java_lang_Thread::priority(thread_oop()); | |
3028 assert(prio != NoPriority, "A valid priority should be present"); | |
3029 } | |
3030 | |
3031 // Push the Java priority down to the native thread; needs Threads_lock | |
3032 Thread::set_priority(this, prio); | |
3033 | |
3034 // Add the new thread to the Threads list and set it in motion. | |
3035 // We must have threads lock in order to call Threads::add. | |
3036 // It is crucial that we do not block before the thread is | |
3037 // added to the Threads list for if a GC happens, then the java_thread oop | |
3038 // will not be visited by GC. | |
3039 Threads::add(this); | |
3040 } | |
3041 | |
3042 oop JavaThread::current_park_blocker() { | |
3043 // Support for JSR-166 locks | |
3044 oop thread_oop = threadObj(); | |
242 | 3045 if (thread_oop != NULL && |
3046 JDK_Version::current().supports_thread_park_blocker()) { | |
0 | 3047 return java_lang_Thread::park_blocker(thread_oop); |
3048 } | |
3049 return NULL; | |
3050 } | |
3051 | |
3052 | |
3053 void JavaThread::print_stack_on(outputStream* st) { | |
3054 if (!has_last_Java_frame()) return; | |
3055 ResourceMark rm; | |
3056 HandleMark hm; | |
3057 | |
3058 RegisterMap reg_map(this); | |
3059 vframe* start_vf = last_java_vframe(®_map); | |
3060 int count = 0; | |
3061 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3062 if (f->is_java_frame()) { | |
3063 javaVFrame* jvf = javaVFrame::cast(f); | |
3064 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); | |
3065 | |
3066 // Print out lock information | |
3067 if (JavaMonitorsInStackTrace) { | |
3068 jvf->print_lock_info_on(st, count); | |
3069 } | |
3070 } else { | |
3071 // Ignore non-Java frames | |
3072 } | |
3073 | |
3074 // Bail-out case for too deep stacks | |
3075 count++; | |
3076 if (MaxJavaStackTraceDepth == count) return; | |
3077 } | |
3078 } | |
3079 | |
3080 | |
3081 // JVMTI PopFrame support | |
3082 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { | |
3083 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); | |
3084 if (in_bytes(size_in_bytes) != 0) { | |
6197 | 3085 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes), mtThread); |
0 | 3086 _popframe_preserved_args_size = in_bytes(size_in_bytes); |
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3087 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
0 | 3088 } |
3089 } | |
3090 | |
3091 void* JavaThread::popframe_preserved_args() { | |
3092 return _popframe_preserved_args; | |
3093 } | |
3094 | |
3095 ByteSize JavaThread::popframe_preserved_args_size() { | |
3096 return in_ByteSize(_popframe_preserved_args_size); | |
3097 } | |
3098 | |
3099 WordSize JavaThread::popframe_preserved_args_size_in_words() { | |
3100 int sz = in_bytes(popframe_preserved_args_size()); | |
3101 assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); | |
3102 return in_WordSize(sz / wordSize); | |
3103 } | |
3104 | |
3105 void JavaThread::popframe_free_preserved_args() { | |
3106 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); | |
6197 | 3107 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args, mtThread); |
0 | 3108 _popframe_preserved_args = NULL; |
3109 _popframe_preserved_args_size = 0; | |
3110 } | |
3111 | |
3112 #ifndef PRODUCT | |
3113 | |
3114 void JavaThread::trace_frames() { | |
3115 tty->print_cr("[Describe stack]"); | |
3116 int frame_no = 1; | |
3117 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
3118 tty->print(" %d. ", frame_no++); | |
3119 fst.current()->print_value_on(tty,this); | |
3120 tty->cr(); | |
3121 } | |
3122 } | |
3123 | |
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3124 class PrintAndVerifyOopClosure: public OopClosure { |
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3125 protected: |
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3126 template <class T> inline void do_oop_work(T* p) { |
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3127 oop obj = oopDesc::load_decode_heap_oop(p); |
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3128 if (obj == NULL) return; |
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3129 tty->print(INTPTR_FORMAT ": ", p); |
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3130 if (obj->is_oop_or_null()) { |
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3131 if (obj->is_objArray()) { |
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3132 tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
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3133 } else { |
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3134 obj->print(); |
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3135 } |
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3136 } else { |
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3137 tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj); |
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3138 } |
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3139 tty->cr(); |
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3140 } |
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3141 public: |
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3142 virtual void do_oop(oop* p) { do_oop_work(p); } |
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3143 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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3144 }; |
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3145 |
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3146 |
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3147 static void oops_print(frame* f, const RegisterMap *map) { |
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3148 PrintAndVerifyOopClosure print; |
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3149 f->print_value(); |
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3150 f->oops_do(&print, NULL, NULL, (RegisterMap*)map); |
3908
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3151 } |
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3152 |
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3153 // Print our all the locations that contain oops and whether they are |
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3154 // valid or not. This useful when trying to find the oldest frame |
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3155 // where an oop has gone bad since the frame walk is from youngest to |
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3156 // oldest. |
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3157 void JavaThread::trace_oops() { |
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3158 tty->print_cr("[Trace oops]"); |
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3159 frames_do(oops_print); |
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3160 } |
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3161 |
0 | 3162 |
3388
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7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3163 #ifdef ASSERT |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3164 // Print or validate the layout of stack frames |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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parents:
2416
diff
changeset
|
3165 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
|
3166 ResourceMark rm; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3167 PRESERVE_EXCEPTION_MARK; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3168 FrameValues values; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3169 int frame_no = 0; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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parents:
2416
diff
changeset
|
3170 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
|
3171 fst.current()->describe(values, ++frame_no); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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parents:
2416
diff
changeset
|
3172 if (depth == frame_no) break; |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3173 } |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3174 if (validate_only) { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3175 values.validate(); |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3176 } else { |
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3177 tty->print_cr("[Describe stack layout]"); |
4042
b20d64f83668
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
4007
diff
changeset
|
3178 values.print(this); |
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3179 } |
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7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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2416
diff
changeset
|
3180 } |
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3181 #endif |
3336
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7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
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2416
diff
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|
3182 |
0 | 3183 void JavaThread::trace_stack_from(vframe* start_vf) { |
3184 ResourceMark rm; | |
3185 int vframe_no = 1; | |
3186 for (vframe* f = start_vf; f; f = f->sender() ) { | |
3187 if (f->is_java_frame()) { | |
3188 javaVFrame::cast(f)->print_activation(vframe_no++); | |
3189 } else { | |
3190 f->print(); | |
3191 } | |
3192 if (vframe_no > StackPrintLimit) { | |
3193 tty->print_cr("...<more frames>..."); | |
3194 return; | |
3195 } | |
3196 } | |
3197 } | |
3198 | |
3199 | |
3200 void JavaThread::trace_stack() { | |
3201 if (!has_last_Java_frame()) return; | |
3202 ResourceMark rm; | |
3203 HandleMark hm; | |
3204 RegisterMap reg_map(this); | |
3205 trace_stack_from(last_java_vframe(®_map)); | |
3206 } | |
3207 | |
3208 | |
3209 #endif // PRODUCT | |
3210 | |
3211 | |
3212 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { | |
3213 assert(reg_map != NULL, "a map must be given"); | |
3214 frame f = last_frame(); | |
3215 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { | |
3216 if (vf->is_java_frame()) return javaVFrame::cast(vf); | |
3217 } | |
3218 return NULL; | |
3219 } | |
3220 | |
3221 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3222 Klass* JavaThread::security_get_caller_class(int depth) { |
0 | 3223 vframeStream vfst(this); |
3224 vfst.security_get_caller_frame(depth); | |
3225 if (!vfst.at_end()) { | |
3226 return vfst.method()->method_holder(); | |
3227 } | |
3228 return NULL; | |
3229 } | |
3230 | |
3231 static void compiler_thread_entry(JavaThread* thread, TRAPS) { | |
3232 assert(thread->is_Compiler_thread(), "must be compiler thread"); | |
3233 CompileBroker::compiler_thread_loop(); | |
3234 } | |
3235 | |
3236 // Create a CompilerThread | |
3237 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) | |
3238 : JavaThread(&compiler_thread_entry) { | |
3239 _env = NULL; | |
3240 _log = NULL; | |
3241 _task = NULL; | |
3242 _queue = queue; | |
3243 _counters = counters; | |
1584 | 3244 _buffer_blob = NULL; |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3245 _scanned_nmethod = NULL; |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3246 _compiler = NULL; |
0 | 3247 |
3248 #ifndef PRODUCT | |
3249 _ideal_graph_printer = NULL; | |
3250 #endif | |
3251 } | |
3252 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3253 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
|
3254 JavaThread::oops_do(f, cld_f, cf); |
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3255 if (_scanned_nmethod != NULL && cf != NULL) { |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3256 // 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
|
3257 // 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
|
3258 // a scan. |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3259 cf->do_code_blob(_scanned_nmethod); |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3260 } |
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3261 } |
0 | 3262 |
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3263 |
0 | 3264 // ======= Threads ======== |
3265 | |
3266 // The Threads class links together all active threads, and provides | |
3267 // operations over all threads. It is protected by its own Mutex | |
3268 // lock, which is also used in other contexts to protect thread | |
3269 // operations from having the thread being operated on from exiting | |
3270 // and going away unexpectedly (e.g., safepoint synchronization) | |
3271 | |
3272 JavaThread* Threads::_thread_list = NULL; | |
3273 int Threads::_number_of_threads = 0; | |
3274 int Threads::_number_of_non_daemon_threads = 0; | |
3275 int Threads::_return_code = 0; | |
3276 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
|
3277 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3278 bool Threads::_vm_complete = false; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3279 #endif |
0 | 3280 |
3281 // All JavaThreads | |
3282 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) | |
3283 | |
3284 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system) | |
3285 void Threads::threads_do(ThreadClosure* tc) { | |
3286 assert_locked_or_safepoint(Threads_lock); | |
3287 // ALL_JAVA_THREADS iterates through all JavaThreads | |
3288 ALL_JAVA_THREADS(p) { | |
3289 tc->do_thread(p); | |
3290 } | |
3291 // Someday we could have a table or list of all non-JavaThreads. | |
3292 // For now, just manually iterate through them. | |
3293 tc->do_thread(VMThread::vm_thread()); | |
3294 Universe::heap()->gc_threads_do(tc); | |
323
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3295 WatcherThread *wt = WatcherThread::watcher_thread(); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3296 // 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
|
3297 // 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
|
3298 // 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
|
3299 // 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
|
3300 // way to prevent termination of WatcherThread would be to acquire |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3301 // 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
|
3302 // checking in some cases. |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3303 if (wt != NULL) |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3304 tc->do_thread(wt); |
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3305 |
0 | 3306 // If CompilerThreads ever become non-JavaThreads, add them here |
3307 } | |
3308 | |
3309 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { | |
3310 | |
242 | 3311 extern void JDK_Version_init(); |
3312 | |
0 | 3313 // Check version |
3314 if (!is_supported_jni_version(args->version)) return JNI_EVERSION; | |
3315 | |
3316 // Initialize the output stream module | |
3317 ostream_init(); | |
3318 | |
3319 // Process java launcher properties. | |
3320 Arguments::process_sun_java_launcher_properties(args); | |
3321 | |
3322 // Initialize the os module before using TLS | |
3323 os::init(); | |
3324 | |
3325 // Initialize system properties. | |
3326 Arguments::init_system_properties(); | |
3327 | |
242 | 3328 // So that JDK version can be used as a discrimintor when parsing arguments |
3329 JDK_Version_init(); | |
3330 | |
1864
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3331 // Update/Initialize System properties after JDK version number is known |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3332 Arguments::init_version_specific_system_properties(); |
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3333 |
0 | 3334 // Parse arguments |
3335 jint parse_result = Arguments::parse(args); | |
3336 if (parse_result != JNI_OK) return parse_result; | |
3337 | |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3338 os::init_before_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3339 |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3340 jint ergo_result = Arguments::apply_ergo(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3341 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
|
3342 |
0 | 3343 if (PauseAtStartup) { |
3344 os::pause(); | |
3345 } | |
3346 | |
4006 | 3347 #ifndef USDT2 |
0 | 3348 HS_DTRACE_PROBE(hotspot, vm__init__begin); |
4006 | 3349 #else /* USDT2 */ |
3350 HOTSPOT_VM_INIT_BEGIN(); | |
3351 #endif /* USDT2 */ | |
0 | 3352 |
3353 // Record VM creation timing statistics | |
3354 TraceVmCreationTime create_vm_timer; | |
3355 create_vm_timer.start(); | |
3356 | |
3357 // Timing (must come after argument parsing) | |
3358 TraceTime timer("Create VM", TraceStartupTime); | |
3359 | |
3360 // Initialize the os module after parsing the args | |
3361 jint os_init_2_result = os::init_2(); | |
3362 if (os_init_2_result != JNI_OK) return os_init_2_result; | |
3363 | |
7177
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3364 jint adjust_after_os_result = Arguments::adjust_after_os(); |
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3365 if (adjust_after_os_result != JNI_OK) return adjust_after_os_result; |
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
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6985
diff
changeset
|
3366 |
6197 | 3367 // intialize TLS |
3368 ThreadLocalStorage::init(); | |
3369 | |
3370 // Bootstrap native memory tracking, so it can start recording memory | |
3371 // activities before worker thread is started. This is the first phase | |
3372 // of bootstrapping, VM is currently running in single-thread mode. | |
3373 MemTracker::bootstrap_single_thread(); | |
3374 | |
0 | 3375 // Initialize output stream logging |
3376 ostream_init_log(); | |
3377 | |
3378 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad | |
3379 // Must be before create_vm_init_agents() | |
3380 if (Arguments::init_libraries_at_startup()) { | |
3381 convert_vm_init_libraries_to_agents(); | |
3382 } | |
3383 | |
3384 // Launch -agentlib/-agentpath and converted -Xrun agents | |
3385 if (Arguments::init_agents_at_startup()) { | |
3386 create_vm_init_agents(); | |
3387 } | |
3388 | |
3389 // Initialize Threads state | |
3390 _thread_list = NULL; | |
3391 _number_of_threads = 0; | |
3392 _number_of_non_daemon_threads = 0; | |
3393 | |
3394 // Initialize global data structures and create system classes in heap | |
3395 vm_init_globals(); | |
3396 | |
3397 // Attach the main thread to this os thread | |
3398 JavaThread* main_thread = new JavaThread(); | |
3399 main_thread->set_thread_state(_thread_in_vm); | |
3400 // must do this before set_active_handles and initialize_thread_local_storage | |
3401 // Note: on solaris initialize_thread_local_storage() will (indirectly) | |
3402 // change the stack size recorded here to one based on the java thread | |
3403 // stacksize. This adjusted size is what is used to figure the placement | |
3404 // of the guard pages. | |
3405 main_thread->record_stack_base_and_size(); | |
3406 main_thread->initialize_thread_local_storage(); | |
3407 | |
3408 main_thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
3409 | |
3410 if (!main_thread->set_as_starting_thread()) { | |
3411 vm_shutdown_during_initialization( | |
3412 "Failed necessary internal allocation. Out of swap space"); | |
3413 delete main_thread; | |
3414 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3415 return JNI_ENOMEM; | |
3416 } | |
3417 | |
3418 // Enable guard page *after* os::create_main_thread(), otherwise it would | |
3419 // crash Linux VM, see notes in os_linux.cpp. | |
3420 main_thread->create_stack_guard_pages(); | |
3421 | |
1878 | 3422 // Initialize Java-Level synchronization subsystem |
3423 ObjectMonitor::Initialize() ; | |
0 | 3424 |
6197 | 3425 // Second phase of bootstrapping, VM is about entering multi-thread mode |
3426 MemTracker::bootstrap_multi_thread(); | |
3427 | |
0 | 3428 // Initialize global modules |
3429 jint status = init_globals(); | |
3430 if (status != JNI_OK) { | |
3431 delete main_thread; | |
3432 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
3433 return status; | |
3434 } | |
3435 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3436 // Should be done after the heap is fully created |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3437 main_thread->cache_global_variables(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3438 |
0 | 3439 HandleMark hm; |
3440 | |
3441 { MutexLocker mu(Threads_lock); | |
3442 Threads::add(main_thread); | |
3443 } | |
3444 | |
3445 // Any JVMTI raw monitors entered in onload will transition into | |
3446 // real raw monitor. VM is setup enough here for raw monitor enter. | |
3447 JvmtiExport::transition_pending_onload_raw_monitors(); | |
3448 | |
6197 | 3449 // Fully start NMT |
3450 MemTracker::start(); | |
3451 | |
0 | 3452 // Create the VMThread |
3453 { TraceTime timer("Start VMThread", TraceStartupTime); | |
3454 VMThread::create(); | |
3455 Thread* vmthread = VMThread::vm_thread(); | |
3456 | |
3457 if (!os::create_thread(vmthread, os::vm_thread)) | |
3458 vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); | |
3459 | |
3460 // Wait for the VM thread to become ready, and VMThread::run to initialize | |
3461 // Monitors can have spurious returns, must always check another state flag | |
3462 { | |
3463 MutexLocker ml(Notify_lock); | |
3464 os::start_thread(vmthread); | |
3465 while (vmthread->active_handles() == NULL) { | |
3466 Notify_lock->wait(); | |
3467 } | |
3468 } | |
3469 } | |
3470 | |
3471 assert (Universe::is_fully_initialized(), "not initialized"); | |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3472 if (VerifyDuringStartup) { |
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9071
diff
changeset
|
3473 // 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
|
3474 VM_Verify verify_op; |
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3475 VMThread::execute(&verify_op); |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3476 } |
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3477 |
0 | 3478 EXCEPTION_MARK; |
3479 | |
3480 // At this point, the Universe is initialized, but we have not executed | |
3481 // any byte code. Now is a good time (the only time) to dump out the | |
3482 // internal state of the JVM for sharing. | |
3483 if (DumpSharedSpaces) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3484 MetaspaceShared::preload_and_dump(CHECK_0); |
0 | 3485 ShouldNotReachHere(); |
3486 } | |
3487 | |
3488 // Always call even when there are not JVMTI environments yet, since environments | |
3489 // may be attached late and JVMTI must track phases of VM execution | |
3490 JvmtiExport::enter_start_phase(); | |
3491 | |
3492 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. | |
3493 JvmtiExport::post_vm_start(); | |
3494 | |
3495 { | |
3496 TraceTime timer("Initialize java.lang classes", TraceStartupTime); | |
3497 | |
3498 if (EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3499 create_vm_init_libraries(); | |
3500 } | |
3501 | |
7608 | 3502 initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
0 | 3503 |
3504 // Initialize java_lang.System (needed before creating the thread) | |
7608 | 3505 initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
3506 initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); | |
3507 Handle thread_group = create_initial_thread_group(CHECK_0); | |
3508 Universe::set_main_thread_group(thread_group()); | |
3509 initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); | |
3510 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); | |
3511 main_thread->set_threadObj(thread_object); | |
3512 // Set thread status to running since main thread has | |
3513 // been started and running. | |
3514 java_lang_Thread::set_thread_status(thread_object, | |
3515 java_lang_Thread::RUNNABLE); | |
3516 | |
3517 // The VM creates & returns objects of this class. Make sure it's initialized. | |
3518 initialize_class(vmSymbols::java_lang_Class(), CHECK_0); | |
3519 | |
3520 // The VM preresolves methods to these classes. Make sure that they get initialized | |
3521 initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); | |
3522 initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); | |
3523 call_initializeSystemClass(CHECK_0); | |
3524 | |
3525 // get the Java runtime name after java.lang.System is initialized | |
3526 JDK_Version::set_runtime_name(get_java_runtime_name(THREAD)); | |
3527 JDK_Version::set_runtime_version(get_java_runtime_version(THREAD)); | |
0 | 3528 |
3529 // an instance of OutOfMemory exception has been allocated earlier | |
7608 | 3530 initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
3531 initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); | |
3532 initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); | |
3533 initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); | |
3534 initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); | |
3535 initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); | |
3536 initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); | |
3537 initialize_class(vmSymbols::java_lang_IllegalArgumentException(), CHECK_0); | |
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
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2376
diff
changeset
|
3538 } |
0 | 3539 |
3540 // See : bugid 4211085. | |
3541 // Background : the static initializer of java.lang.Compiler tries to read | |
3542 // property"java.compiler" and read & write property "java.vm.info". | |
3543 // When a security manager is installed through the command line | |
3544 // option "-Djava.security.manager", the above properties are not | |
3545 // readable and the static initializer for java.lang.Compiler fails | |
3546 // resulting in a NoClassDefFoundError. This can happen in any | |
3547 // user code which calls methods in java.lang.Compiler. | |
3548 // Hack : the hack is to pre-load and initialize this class, so that only | |
3549 // system domains are on the stack when the properties are read. | |
3550 // Currently even the AWT code has calls to methods in java.lang.Compiler. | |
3551 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT. | |
3552 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and | |
3553 // read and write"java.vm.info" in the default policy file. See bugid 4211383 | |
3554 // 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
|
3555 initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
0 | 3556 |
3557 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to | |
3558 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot | |
3559 // compiler does not get loaded through java.lang.Compiler). "java -version" with the | |
3560 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here. | |
3561 // This should also be taken out as soon as 4211383 gets fixed. | |
3562 reset_vm_info_property(CHECK_0); | |
3563 | |
3564 quicken_jni_functions(); | |
3565 | |
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3566 // Must be run after init_ft which initializes ft_enabled |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3567 if (TRACE_INITIALIZE() != JNI_OK) { |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3568 vm_exit_during_initialization("Failed to initialize tracing backend"); |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3569 } |
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3570 |
0 | 3571 // Set flag that basic initialization has completed. Used by exceptions and various |
3572 // debug stuff, that does not work until all basic classes have been initialized. | |
3573 set_init_completed(); | |
3574 | |
4006 | 3575 #ifndef USDT2 |
0 | 3576 HS_DTRACE_PROBE(hotspot, vm__init__end); |
4006 | 3577 #else /* USDT2 */ |
3578 HOTSPOT_VM_INIT_END(); | |
3579 #endif /* USDT2 */ | |
0 | 3580 |
3581 // record VM initialization completion time | |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3582 #if INCLUDE_MANAGEMENT |
0 | 3583 Management::record_vm_init_completed(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
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6769
diff
changeset
|
3584 #endif // INCLUDE_MANAGEMENT |
0 | 3585 |
3586 // Compute system loader. Note that this has to occur after set_init_completed, since | |
3587 // valid exceptions may be thrown in the process. | |
3588 // Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and | |
3589 // set_init_completed has just been called, causing exceptions not to be shortcut | |
3590 // anymore. We call vm_exit_during_initialization directly instead. | |
3591 SystemDictionary::compute_java_system_loader(THREAD); | |
3592 if (HAS_PENDING_EXCEPTION) { | |
3593 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3594 } | |
3595 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3596 #if INCLUDE_ALL_GCS |
0 | 3597 // Support for ConcurrentMarkSweep. This should be cleaned up |
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3598 // 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
|
3599 // once things are properly refactored. XXX YSR |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3600 if (UseConcMarkSweepGC || UseG1GC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3601 if (UseConcMarkSweepGC) { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3602 ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3603 } else { |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3604 ConcurrentMarkThread::makeSurrogateLockerThread(THREAD); |
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3605 } |
0 | 3606 if (HAS_PENDING_EXCEPTION) { |
3607 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
3608 } | |
3609 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3610 #endif // INCLUDE_ALL_GCS |
0 | 3611 |
3612 // Always call even when there are not JVMTI environments yet, since environments | |
3613 // may be attached late and JVMTI must track phases of VM execution | |
3614 JvmtiExport::enter_live_phase(); | |
3615 | |
3616 // Signal Dispatcher needs to be started before VMInit event is posted | |
3617 os::signal_init(); | |
3618 | |
3619 // Start Attach Listener if +StartAttachListener or it can't be started lazily | |
3620 if (!DisableAttachMechanism) { | |
11139
2e8f19c2feef
7162400: Intermittent java.io.IOException: Bad file number during HotSpotVirtualMachine.executeCommand
allwin
parents:
11136
diff
changeset
|
3621 AttachListener::vm_start(); |
0 | 3622 if (StartAttachListener || AttachListener::init_at_startup()) { |
3623 AttachListener::init(); | |
3624 } | |
3625 } | |
3626 | |
3627 // Launch -Xrun agents | |
3628 // Must be done in the JVMTI live phase so that for backward compatibility the JDWP | |
3629 // back-end can launch with -Xdebug -Xrunjdwp. | |
3630 if (!EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
3631 create_vm_init_libraries(); | |
3632 } | |
3633 | |
6002
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3634 // 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
|
3635 JvmtiExport::post_vm_initialized(); |
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3636 |
10405 | 3637 if (TRACE_START() != JNI_OK) { |
3638 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
|
3639 } |
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3640 |
3799
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3641 if (CleanChunkPoolAsync) { |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3642 Chunk::start_chunk_pool_cleaner_task(); |
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3643 } |
0 | 3644 |
3645 // initialize compiler(s) | |
7195 | 3646 #if defined(COMPILER1) || defined(COMPILER2) || defined(SHARK) |
0 | 3647 CompileBroker::compilation_init(); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3648 #endif |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3649 |
12163
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3650 if (EnableInvokeDynamic) { |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3651 // 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
|
3652 // 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
|
3653 // signature polymorphic MH intrinsics can be missed |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3654 // (see SystemDictionary::find_method_handle_intrinsic). |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3655 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
|
3656 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
|
3657 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
|
3658 } |
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3659 |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3660 #if INCLUDE_MANAGEMENT |
0 | 3661 Management::initialize(THREAD); |
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3662 #endif // INCLUDE_MANAGEMENT |
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3663 |
0 | 3664 if (HAS_PENDING_EXCEPTION) { |
3665 // management agent fails to start possibly due to | |
3666 // configuration problem and is responsible for printing | |
3667 // stack trace if appropriate. Simply exit VM. | |
3668 vm_exit(1); | |
3669 } | |
3670 | |
3671 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); | |
3672 if (MemProfiling) MemProfiler::engage(); | |
3673 StatSampler::engage(); | |
3674 if (CheckJNICalls) JniPeriodicChecker::engage(); | |
3675 | |
3676 BiasedLocking::init(); | |
3677 | |
17780 | 3678 #if INCLUDE_RTM_OPT |
3679 RTMLockingCounters::init(); | |
3680 #endif | |
3681 | |
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3682 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
|
3683 call_postVMInitHook(THREAD); |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3684 // 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
|
3685 // exceptions and provide means of diagnosis. |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3686 if (HAS_PENDING_EXCEPTION) { |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3687 CLEAR_PENDING_EXCEPTION; |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3688 } |
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3689 } |
0 | 3690 |
6939
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3691 { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3692 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
|
3693 // 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
|
3694 // or by dynamic enrollment. |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3695 WatcherThread::make_startable(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3696 // 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
|
3697 // 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
|
3698 // 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
|
3699 // 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
|
3700 if (PeriodicTask::num_tasks() > 0) { |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3701 WatcherThread::start(); |
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3702 } |
0 | 3703 } |
3704 | |
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3705 // Give os specific code one last chance to start |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3706 os::init_3(); |
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3707 |
0 | 3708 create_vm_timer.end(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3709 #ifdef ASSERT |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3710 _vm_complete = true; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3711 #endif |
0 | 3712 return JNI_OK; |
3713 } | |
3714 | |
3715 // type for the Agent_OnLoad and JVM_OnLoad entry points | |
3716 extern "C" { | |
3717 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); | |
3718 } | |
3719 // Find a command line agent library and return its entry point for | |
3720 // -agentlib: -agentpath: -Xrun | |
3721 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. | |
3722 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { | |
3723 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
|
3724 void *library = NULL; |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3725 |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3726 if (!agent->valid()) { |
0 | 3727 char buffer[JVM_MAXPATHLEN]; |
3728 char ebuf[1024]; | |
3729 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
|
3730 const char *msg = "Could not find agent library "; |
0 | 3731 |
12220 | 3732 // 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
|
3733 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
|
3734 library = agent->os_lib(); |
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3735 } else if (agent->is_absolute_path()) { |
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3736 library = os::dll_load(name, ebuf, sizeof ebuf); |
0 | 3737 if (library == NULL) { |
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3738 const char *sub_msg = " in absolute path, with error: "; |
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3739 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3740 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
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3741 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3742 // If we can't find the agent, exit. |
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3743 vm_exit_during_initialization(buf, NULL); |
6197 | 3744 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3745 } |
3746 } else { | |
3747 // Try to load the agent from the standard dll directory | |
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3748 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
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3749 name)) { |
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3750 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
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3751 } |
0 | 3752 if (library == NULL) { // Try the local directory |
3753 char ns[1] = {0}; | |
6966
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3754 if (os::dll_build_name(buffer, sizeof(buffer), ns, name)) { |
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3755 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
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3756 } |
0 | 3757 if (library == NULL) { |
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3758 const char *sub_msg = " on the library path, with error: "; |
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3759 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
6197 | 3760 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
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|
3761 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
0 | 3762 // If we can't find the agent, exit. |
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3763 vm_exit_during_initialization(buf, NULL); |
6197 | 3764 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
0 | 3765 } |
3766 } | |
3767 } | |
3768 agent->set_os_lib(library); | |
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3769 agent->set_valid(); |
0 | 3770 } |
3771 | |
3772 // Find the OnLoad function. | |
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3773 on_load_entry = |
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3774 CAST_TO_FN_PTR(OnLoadEntry_t, os::find_agent_function(agent, |
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|
3775 false, |
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|
3776 on_load_symbols, |
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3777 num_symbol_entries)); |
0 | 3778 return on_load_entry; |
3779 } | |
3780 | |
3781 // Find the JVM_OnLoad entry point | |
3782 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { | |
3783 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; | |
3784 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3785 } | |
3786 | |
3787 // Find the Agent_OnLoad entry point | |
3788 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { | |
3789 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; | |
3790 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
3791 } | |
3792 | |
3793 // For backwards compatibility with -Xrun | |
3794 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be | |
3795 // treated like -agentpath: | |
3796 // Must be called before agent libraries are created | |
3797 void Threads::convert_vm_init_libraries_to_agents() { | |
3798 AgentLibrary* agent; | |
3799 AgentLibrary* next; | |
3800 | |
3801 for (agent = Arguments::libraries(); agent != NULL; agent = next) { | |
3802 next = agent->next(); // cache the next agent now as this agent may get moved off this list | |
3803 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3804 | |
3805 // If there is an JVM_OnLoad function it will get called later, | |
3806 // otherwise see if there is an Agent_OnLoad | |
3807 if (on_load_entry == NULL) { | |
3808 on_load_entry = lookup_agent_on_load(agent); | |
3809 if (on_load_entry != NULL) { | |
3810 // switch it to the agent list -- so that Agent_OnLoad will be called, | |
3811 // JVM_OnLoad won't be attempted and Agent_OnUnload will | |
3812 Arguments::convert_library_to_agent(agent); | |
3813 } else { | |
3814 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); | |
3815 } | |
3816 } | |
3817 } | |
3818 } | |
3819 | |
3820 // Create agents for -agentlib: -agentpath: and converted -Xrun | |
3821 // Invokes Agent_OnLoad | |
3822 // Called very early -- before JavaThreads exist | |
3823 void Threads::create_vm_init_agents() { | |
3824 extern struct JavaVM_ main_vm; | |
3825 AgentLibrary* agent; | |
3826 | |
3827 JvmtiExport::enter_onload_phase(); | |
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3828 |
0 | 3829 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
3830 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); | |
3831 | |
3832 if (on_load_entry != NULL) { | |
3833 // Invoke the Agent_OnLoad function | |
3834 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3835 if (err != JNI_OK) { | |
3836 vm_exit_during_initialization("agent library failed to init", agent->name()); | |
3837 } | |
3838 } else { | |
3839 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); | |
3840 } | |
3841 } | |
3842 JvmtiExport::enter_primordial_phase(); | |
3843 } | |
3844 | |
3845 extern "C" { | |
3846 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); | |
3847 } | |
3848 | |
3849 void Threads::shutdown_vm_agents() { | |
3850 // Send any Agent_OnUnload notifications | |
3851 const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS; | |
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3852 size_t num_symbol_entries = ARRAY_SIZE(on_unload_symbols); |
0 | 3853 extern struct JavaVM_ main_vm; |
3854 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
3855 | |
3856 // Find the Agent_OnUnload function. | |
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3857 Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t, |
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|
3858 os::find_agent_function(agent, |
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|
3859 false, |
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|
3860 on_unload_symbols, |
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|
3861 num_symbol_entries)); |
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|
3862 |
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|
3863 // Invoke the Agent_OnUnload function |
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|
3864 if (unload_entry != NULL) { |
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3865 JavaThread* thread = JavaThread::current(); |
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3866 ThreadToNativeFromVM ttn(thread); |
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3867 HandleMark hm(thread); |
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3868 (*unload_entry)(&main_vm); |
0 | 3869 } |
3870 } | |
3871 } | |
3872 | |
3873 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries | |
3874 // Invokes JVM_OnLoad | |
3875 void Threads::create_vm_init_libraries() { | |
3876 extern struct JavaVM_ main_vm; | |
3877 AgentLibrary* agent; | |
3878 | |
3879 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { | |
3880 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
3881 | |
3882 if (on_load_entry != NULL) { | |
3883 // Invoke the JVM_OnLoad function | |
3884 JavaThread* thread = JavaThread::current(); | |
3885 ThreadToNativeFromVM ttn(thread); | |
3886 HandleMark hm(thread); | |
3887 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
3888 if (err != JNI_OK) { | |
3889 vm_exit_during_initialization("-Xrun library failed to init", agent->name()); | |
3890 } | |
3891 } else { | |
3892 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); | |
3893 } | |
3894 } | |
3895 } | |
3896 | |
3897 // Last thread running calls java.lang.Shutdown.shutdown() | |
3898 void JavaThread::invoke_shutdown_hooks() { | |
3899 HandleMark hm(this); | |
3900 | |
3901 // We could get here with a pending exception, if so clear it now. | |
3902 if (this->has_pending_exception()) { | |
3903 this->clear_pending_exception(); | |
3904 } | |
3905 | |
3906 EXCEPTION_MARK; | |
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3907 Klass* k = |
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3908 SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
0 | 3909 THREAD); |
3910 if (k != NULL) { | |
3911 // SystemDictionary::resolve_or_null will return null if there was | |
3912 // an exception. If we cannot load the Shutdown class, just don't | |
3913 // call Shutdown.shutdown() at all. This will mean the shutdown hooks | |
3914 // and finalizers (if runFinalizersOnExit is set) won't be run. | |
3915 // Note that if a shutdown hook was registered or runFinalizersOnExit | |
3916 // was called, the Shutdown class would have already been loaded | |
3917 // (Runtime.addShutdownHook and runFinalizersOnExit will load it). | |
3918 instanceKlassHandle shutdown_klass (THREAD, k); | |
3919 JavaValue result(T_VOID); | |
3920 JavaCalls::call_static(&result, | |
3921 shutdown_klass, | |
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3922 vmSymbols::shutdown_method_name(), |
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3923 vmSymbols::void_method_signature(), |
0 | 3924 THREAD); |
3925 } | |
3926 CLEAR_PENDING_EXCEPTION; | |
3927 } | |
3928 | |
3929 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when | |
3930 // the program falls off the end of main(). Another VM exit path is through | |
3931 // vm_exit() when the program calls System.exit() to return a value or when | |
3932 // there is a serious error in VM. The two shutdown paths are not exactly | |
3933 // the same, but they share Shutdown.shutdown() at Java level and before_exit() | |
3934 // and VM_Exit op at VM level. | |
3935 // | |
3936 // Shutdown sequence: | |
6197 | 3937 // + Shutdown native memory tracking if it is on |
0 | 3938 // + Wait until we are the last non-daemon thread to execute |
3939 // <-- every thing is still working at this moment --> | |
3940 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level | |
3941 // shutdown hooks, run finalizers if finalization-on-exit | |
3942 // + Call before_exit(), prepare for VM exit | |
3943 // > run VM level shutdown hooks (they are registered through JVM_OnExit(), | |
3944 // currently the only user of this mechanism is File.deleteOnExit()) | |
3945 // > stop flat profiler, StatSampler, watcher thread, CMS threads, | |
3946 // post thread end and vm death events to JVMTI, | |
3947 // stop signal thread | |
3948 // + Call JavaThread::exit(), it will: | |
3949 // > release JNI handle blocks, remove stack guard pages | |
3950 // > remove this thread from Threads list | |
3951 // <-- no more Java code from this thread after this point --> | |
3952 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop | |
3953 // the compiler threads at safepoint | |
3954 // <-- do not use anything that could get blocked by Safepoint --> | |
3955 // + Disable tracing at JNI/JVM barriers | |
3956 // + Set _vm_exited flag for threads that are still running native code | |
3957 // + Delete this thread | |
3958 // + Call exit_globals() | |
3959 // > deletes tty | |
3960 // > deletes PerfMemory resources | |
3961 // + Return to caller | |
3962 | |
3963 bool Threads::destroy_vm() { | |
3964 JavaThread* thread = JavaThread::current(); | |
3965 | |
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3966 #ifdef ASSERT |
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3967 _vm_complete = false; |
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3968 #endif |
0 | 3969 // Wait until we are the last non-daemon thread to execute |
3970 { MutexLocker nu(Threads_lock); | |
3971 while (Threads::number_of_non_daemon_threads() > 1 ) | |
3972 // This wait should make safepoint checks, wait without a timeout, | |
3973 // and wait as a suspend-equivalent condition. | |
3974 // | |
3975 // Note: If the FlatProfiler is running and this thread is waiting | |
3976 // for another non-daemon thread to finish, then the FlatProfiler | |
3977 // is waiting for the external suspend request on this thread to | |
3978 // complete. wait_for_ext_suspend_completion() will eventually | |
3979 // timeout, but that takes time. Making this wait a suspend- | |
3980 // equivalent condition solves that timeout problem. | |
3981 // | |
3982 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
3983 Mutex::_as_suspend_equivalent_flag); | |
3984 } | |
3985 | |
3986 // Hang forever on exit if we are reporting an error. | |
3987 if (ShowMessageBoxOnError && is_error_reported()) { | |
3988 os::infinite_sleep(); | |
3989 } | |
2302
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3990 os::wait_for_keypress_at_exit(); |
0 | 3991 |
3992 if (JDK_Version::is_jdk12x_version()) { | |
3993 // We are the last thread running, so check if finalizers should be run. | |
3994 // For 1.3 or later this is done in thread->invoke_shutdown_hooks() | |
3995 HandleMark rm(thread); | |
3996 Universe::run_finalizers_on_exit(); | |
3997 } else { | |
3998 // run Java level shutdown hooks | |
3999 thread->invoke_shutdown_hooks(); | |
4000 } | |
4001 | |
4002 before_exit(thread); | |
4003 | |
4004 thread->exit(true); | |
4005 | |
4006 // Stop VM thread. | |
4007 { | |
4008 // 4945125 The vm thread comes to a safepoint during exit. | |
4009 // GC vm_operations can get caught at the safepoint, and the | |
4010 // heap is unparseable if they are caught. Grab the Heap_lock | |
4011 // to prevent this. The GC vm_operations will not be able to | |
4012 // queue until after the vm thread is dead. | |
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4013 // After this point, we'll never emerge out of the safepoint before |
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4014 // the VM exits, so concurrent GC threads do not need to be explicitly |
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4015 // stopped; they remain inactive until the process exits. |
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4016 // Note: some concurrent G1 threads may be running during a safepoint, |
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4017 // but these will not be accessing the heap, just some G1-specific side |
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4018 // data structures that are not accessed by any other threads but them |
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4019 // after this point in a terminal safepoint. |
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|
4020 |
0 | 4021 MutexLocker ml(Heap_lock); |
4022 | |
4023 VMThread::wait_for_vm_thread_exit(); | |
4024 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); | |
4025 VMThread::destroy(); | |
4026 } | |
4027 | |
4028 // clean up ideal graph printers | |
4029 #if defined(COMPILER2) && !defined(PRODUCT) | |
4030 IdealGraphPrinter::clean_up(); | |
4031 #endif | |
4032 | |
4033 // Now, all Java threads are gone except daemon threads. Daemon threads | |
4034 // running Java code or in VM are stopped by the Safepoint. However, | |
4035 // daemon threads executing native code are still running. But they | |
4036 // will be stopped at native=>Java/VM barriers. Note that we can't | |
4037 // simply kill or suspend them, as it is inherently deadlock-prone. | |
4038 | |
4039 #ifndef PRODUCT | |
4040 // disable function tracing at JNI/JVM barriers | |
4041 TraceJNICalls = false; | |
4042 TraceJVMCalls = false; | |
4043 TraceRuntimeCalls = false; | |
4044 #endif | |
4045 | |
4046 VM_Exit::set_vm_exited(); | |
4047 | |
4048 notify_vm_shutdown(); | |
4049 | |
4050 delete thread; | |
4051 | |
4052 // exit_globals() will delete tty | |
4053 exit_globals(); | |
4054 | |
4055 return true; | |
4056 } | |
4057 | |
4058 | |
4059 jboolean Threads::is_supported_jni_version_including_1_1(jint version) { | |
4060 if (version == JNI_VERSION_1_1) return JNI_TRUE; | |
4061 return is_supported_jni_version(version); | |
4062 } | |
4063 | |
4064 | |
4065 jboolean Threads::is_supported_jni_version(jint version) { | |
4066 if (version == JNI_VERSION_1_2) return JNI_TRUE; | |
4067 if (version == JNI_VERSION_1_4) return JNI_TRUE; | |
4068 if (version == JNI_VERSION_1_6) return JNI_TRUE; | |
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|
4069 if (version == JNI_VERSION_1_8) return JNI_TRUE; |
0 | 4070 return JNI_FALSE; |
4071 } | |
4072 | |
4073 | |
4074 void Threads::add(JavaThread* p, bool force_daemon) { | |
4075 // The threads lock must be owned at this point | |
4076 assert_locked_or_safepoint(Threads_lock); | |
1842
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
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1838
diff
changeset
|
4077 |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
4078 // See the comment for this method in thread.hpp for its purpose and |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
4079 // why it is called here. |
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
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1838
diff
changeset
|
4080 p->initialize_queues(); |
0 | 4081 p->set_next(_thread_list); |
4082 _thread_list = p; | |
4083 _number_of_threads++; | |
4084 oop threadObj = p->threadObj(); | |
4085 bool daemon = true; | |
4086 // Bootstrapping problem: threadObj can be null for initial | |
4087 // JavaThread (or for threads attached via JNI) | |
4088 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { | |
4089 _number_of_non_daemon_threads++; | |
4090 daemon = false; | |
4091 } | |
4092 | |
6197 | 4093 p->set_safepoint_visible(true); |
4094 | |
0 | 4095 ThreadService::add_thread(p, daemon); |
4096 | |
4097 // Possible GC point. | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4800
diff
changeset
|
4098 Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
0 | 4099 } |
4100 | |
4101 void Threads::remove(JavaThread* p) { | |
4102 // Extra scope needed for Thread_lock, so we can check | |
4103 // that we do not remove thread without safepoint code notice | |
4104 { MutexLocker ml(Threads_lock); | |
4105 | |
4106 assert(includes(p), "p must be present"); | |
4107 | |
4108 JavaThread* current = _thread_list; | |
4109 JavaThread* prev = NULL; | |
4110 | |
4111 while (current != p) { | |
4112 prev = current; | |
4113 current = current->next(); | |
4114 } | |
4115 | |
4116 if (prev) { | |
4117 prev->set_next(current->next()); | |
4118 } else { | |
4119 _thread_list = p->next(); | |
4120 } | |
4121 _number_of_threads--; | |
4122 oop threadObj = p->threadObj(); | |
4123 bool daemon = true; | |
4124 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { | |
4125 _number_of_non_daemon_threads--; | |
4126 daemon = false; | |
4127 | |
4128 // Only one thread left, do a notify on the Threads_lock so a thread waiting | |
4129 // on destroy_vm will wake up. | |
4130 if (number_of_non_daemon_threads() == 1) | |
4131 Threads_lock->notify_all(); | |
4132 } | |
4133 ThreadService::remove_thread(p, daemon); | |
4134 | |
4135 // Make sure that safepoint code disregard this thread. This is needed since | |
4136 // the thread might mess around with locks after this point. This can cause it | |
4137 // to do callbacks into the safepoint code. However, the safepoint code is not aware | |
4138 // of this thread since it is removed from the queue. | |
4139 p->set_terminated_value(); | |
6197 | 4140 |
4141 // Now, this thread is not visible to safepoint | |
4142 p->set_safepoint_visible(false); | |
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
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6872
diff
changeset
|
4143 // once the thread becomes safepoint invisible, we can not use its per-thread |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
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6872
diff
changeset
|
4144 // 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
|
4145 // to release its per-thread recorder here. |
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
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6872
diff
changeset
|
4146 MemTracker::thread_exiting(p); |
0 | 4147 } // unlock Threads_lock |
4148 | |
4149 // 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
|
4150 Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
0 | 4151 } |
4152 | |
4153 // Threads_lock must be held when this is called (or must be called during a safepoint) | |
4154 bool Threads::includes(JavaThread* p) { | |
4155 assert(Threads_lock->is_locked(), "sanity check"); | |
4156 ALL_JAVA_THREADS(q) { | |
4157 if (q == p ) { | |
4158 return true; | |
4159 } | |
4160 } | |
4161 return false; | |
4162 } | |
4163 | |
4164 // Operations on the Threads list for GC. These are not explicitly locked, | |
4165 // but the garbage collector must provide a safe context for them to run. | |
4166 // In particular, these things should never be called when the Threads_lock | |
4167 // is held by some other thread. (Note: the Safepoint abstraction also | |
4168 // uses the Threads_lock to gurantee this property. It also makes sure that | |
4169 // all threads gets blocked when exiting or starting). | |
4170 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4171 void Threads::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4172 ALL_JAVA_THREADS(p) { |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4173 p->oops_do(f, cld_f, cf); |
0 | 4174 } |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4175 VMThread::vm_thread()->oops_do(f, cld_f, cf); |
0 | 4176 } |
4177 | |
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
4178 void Threads::possibly_parallel_oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
0 | 4179 // Introduce a mechanism allowing parallel threads to claim threads as |
4180 // root groups. Overhead should be small enough to use all the time, | |
4181 // even in sequential code. | |
4182 SharedHeap* sh = SharedHeap::heap(); | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4183 // Cannot yet substitute active_workers for n_par_threads |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4184 // because of G1CollectedHeap::verify() use of |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4185 // SharedHeap::process_strong_roots(). n_par_threads == 0 will |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4186 // 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
|
4187 // is being used for parallelism elsewhere. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4188 bool is_par = sh->n_par_threads() > 0; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4189 assert(!is_par || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4190 (SharedHeap::heap()->n_par_threads() == |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4191 SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
0 | 4192 int cp = SharedHeap::heap()->strong_roots_parity(); |
4193 ALL_JAVA_THREADS(p) { | |
4194 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
|
4195 p->oops_do(f, cld_f, cf); |
0 | 4196 } |
4197 } | |
4198 VMThread* vmt = VMThread::vm_thread(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4199 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
|
4200 vmt->oops_do(f, cld_f, cf); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4201 } |
0 | 4202 } |
4203 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4204 #if INCLUDE_ALL_GCS |
0 | 4205 // Used by ParallelScavenge |
4206 void Threads::create_thread_roots_tasks(GCTaskQueue* q) { | |
4207 ALL_JAVA_THREADS(p) { | |
4208 q->enqueue(new ThreadRootsTask(p)); | |
4209 } | |
4210 q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); | |
4211 } | |
4212 | |
4213 // Used by Parallel Old | |
4214 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { | |
4215 ALL_JAVA_THREADS(p) { | |
4216 q->enqueue(new ThreadRootsMarkingTask(p)); | |
4217 } | |
4218 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); | |
4219 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4220 #endif // INCLUDE_ALL_GCS |
0 | 4221 |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4222 void Threads::nmethods_do(CodeBlobClosure* cf) { |
0 | 4223 ALL_JAVA_THREADS(p) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4224 p->nmethods_do(cf); |
0 | 4225 } |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4226 VMThread::vm_thread()->nmethods_do(cf); |
0 | 4227 } |
4228 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4229 void Threads::metadata_do(void f(Metadata*)) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4230 ALL_JAVA_THREADS(p) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4231 p->metadata_do(f); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4232 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4233 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4234 |
0 | 4235 void Threads::gc_epilogue() { |
4236 ALL_JAVA_THREADS(p) { | |
4237 p->gc_epilogue(); | |
4238 } | |
4239 } | |
4240 | |
4241 void Threads::gc_prologue() { | |
4242 ALL_JAVA_THREADS(p) { | |
4243 p->gc_prologue(); | |
4244 } | |
4245 } | |
4246 | |
4247 void Threads::deoptimized_wrt_marked_nmethods() { | |
4248 ALL_JAVA_THREADS(p) { | |
4249 p->deoptimized_wrt_marked_nmethods(); | |
4250 } | |
4251 } | |
4252 | |
4253 | |
4254 // Get count Java threads that are waiting to enter the specified monitor. | |
4255 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, | |
4256 address monitor, bool doLock) { | |
4257 assert(doLock || SafepointSynchronize::is_at_safepoint(), | |
4258 "must grab Threads_lock or be at safepoint"); | |
4259 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); | |
4260 | |
4261 int i = 0; | |
4262 { | |
4263 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4264 ALL_JAVA_THREADS(p) { | |
4265 if (p->is_Compiler_thread()) continue; | |
4266 | |
4267 address pending = (address)p->current_pending_monitor(); | |
4268 if (pending == monitor) { // found a match | |
4269 if (i < count) result->append(p); // save the first count matches | |
4270 i++; | |
4271 } | |
4272 } | |
4273 } | |
4274 return result; | |
4275 } | |
4276 | |
4277 | |
4278 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { | |
4279 assert(doLock || | |
4280 Threads_lock->owned_by_self() || | |
4281 SafepointSynchronize::is_at_safepoint(), | |
4282 "must grab Threads_lock or be at safepoint"); | |
4283 | |
4284 // NULL owner means not locked so we can skip the search | |
4285 if (owner == NULL) return NULL; | |
4286 | |
4287 { | |
4288 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4289 ALL_JAVA_THREADS(p) { | |
4290 // first, see if owner is the address of a Java thread | |
4291 if (owner == (address)p) return p; | |
4292 } | |
4293 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4294 // 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
|
4295 // 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
|
4296 // like deadlock detection. |
0 | 4297 if (UseHeavyMonitors) return NULL; |
4298 | |
4299 // | |
4300 // If we didn't find a matching Java thread and we didn't force use of | |
4301 // heavyweight monitors, then the owner is the stack address of the | |
4302 // Lock Word in the owning Java thread's stack. | |
4303 // | |
4304 JavaThread* the_owner = NULL; | |
4305 { | |
4306 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
4307 ALL_JAVA_THREADS(q) { | |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4308 if (q->is_lock_owned(owner)) { |
0 | 4309 the_owner = q; |
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4310 break; |
0 | 4311 } |
4312 } | |
4313 } | |
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4314 // cannot assert on lack of success here; see above comment |
0 | 4315 return the_owner; |
4316 } | |
4317 | |
4318 // Threads::print_on() is called at safepoint by VM_PrintThreads operation. | |
4319 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { | |
4320 char buf[32]; | |
4321 st->print_cr(os::local_time_string(buf, sizeof(buf))); | |
4322 | |
4323 st->print_cr("Full thread dump %s (%s %s):", | |
4324 Abstract_VM_Version::vm_name(), | |
4325 Abstract_VM_Version::vm_release(), | |
4326 Abstract_VM_Version::vm_info_string() | |
4327 ); | |
4328 st->cr(); | |
4329 | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4330 #if INCLUDE_ALL_GCS |
0 | 4331 // Dump concurrent locks |
4332 ConcurrentLocksDump concurrent_locks; | |
4333 if (print_concurrent_locks) { | |
4334 concurrent_locks.dump_at_safepoint(); | |
4335 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4336 #endif // INCLUDE_ALL_GCS |
0 | 4337 |
4338 ALL_JAVA_THREADS(p) { | |
4339 ResourceMark rm; | |
4340 p->print_on(st); | |
4341 if (print_stacks) { | |
4342 if (internal_format) { | |
4343 p->trace_stack(); | |
4344 } else { | |
4345 p->print_stack_on(st); | |
4346 } | |
4347 } | |
4348 st->cr(); | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4349 #if INCLUDE_ALL_GCS |
0 | 4350 if (print_concurrent_locks) { |
4351 concurrent_locks.print_locks_on(p, st); | |
4352 } | |
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4353 #endif // INCLUDE_ALL_GCS |
0 | 4354 } |
4355 | |
4356 VMThread::vm_thread()->print_on(st); | |
4357 st->cr(); | |
4358 Universe::heap()->print_gc_threads_on(st); | |
4359 WatcherThread* wt = WatcherThread::watcher_thread(); | |
6766 | 4360 if (wt != NULL) { |
4361 wt->print_on(st); | |
4362 st->cr(); | |
4363 } | |
0 | 4364 CompileBroker::print_compiler_threads_on(st); |
4365 st->flush(); | |
4366 } | |
4367 | |
4368 // Threads::print_on_error() is called by fatal error handler. It's possible | |
4369 // that VM is not at safepoint and/or current thread is inside signal handler. | |
4370 // Don't print stack trace, as the stack may not be walkable. Don't allocate | |
4371 // memory (even in resource area), it might deadlock the error handler. | |
4372 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { | |
4373 bool found_current = false; | |
4374 st->print_cr("Java Threads: ( => current thread )"); | |
4375 ALL_JAVA_THREADS(thread) { | |
4376 bool is_current = (current == thread); | |
4377 found_current = found_current || is_current; | |
4378 | |
4379 st->print("%s", is_current ? "=>" : " "); | |
4380 | |
4381 st->print(PTR_FORMAT, thread); | |
4382 st->print(" "); | |
4383 thread->print_on_error(st, buf, buflen); | |
4384 st->cr(); | |
4385 } | |
4386 st->cr(); | |
4387 | |
4388 st->print_cr("Other Threads:"); | |
4389 if (VMThread::vm_thread()) { | |
4390 bool is_current = (current == VMThread::vm_thread()); | |
4391 found_current = found_current || is_current; | |
4392 st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); | |
4393 | |
4394 st->print(PTR_FORMAT, VMThread::vm_thread()); | |
4395 st->print(" "); | |
4396 VMThread::vm_thread()->print_on_error(st, buf, buflen); | |
4397 st->cr(); | |
4398 } | |
4399 WatcherThread* wt = WatcherThread::watcher_thread(); | |
4400 if (wt != NULL) { | |
4401 bool is_current = (current == wt); | |
4402 found_current = found_current || is_current; | |
4403 st->print("%s", is_current ? "=>" : " "); | |
4404 | |
4405 st->print(PTR_FORMAT, wt); | |
4406 st->print(" "); | |
4407 wt->print_on_error(st, buf, buflen); | |
4408 st->cr(); | |
4409 } | |
4410 if (!found_current) { | |
4411 st->cr(); | |
4412 st->print("=>" PTR_FORMAT " (exited) ", current); | |
4413 current->print_on_error(st, buf, buflen); | |
4414 st->cr(); | |
4415 } | |
4416 } | |
4417 | |
1878 | 4418 // Internal SpinLock and Mutex |
4419 // Based on ParkEvent | |
4420 | |
4421 // Ad-hoc mutual exclusion primitives: SpinLock and Mux | |
0 | 4422 // |
1878 | 4423 // We employ SpinLocks _only for low-contention, fixed-length |
4424 // short-duration critical sections where we're concerned | |
4425 // about native mutex_t or HotSpot Mutex:: latency. | |
4426 // The mux construct provides a spin-then-block mutual exclusion | |
4427 // mechanism. | |
4428 // | |
4429 // Testing has shown that contention on the ListLock guarding gFreeList | |
4430 // is common. If we implement ListLock as a simple SpinLock it's common | |
4431 // for the JVM to devolve to yielding with little progress. This is true | |
4432 // despite the fact that the critical sections protected by ListLock are | |
4433 // extremely short. | |
0 | 4434 // |
1878 | 4435 // TODO-FIXME: ListLock should be of type SpinLock. |
4436 // We should make this a 1st-class type, integrated into the lock | |
4437 // hierarchy as leaf-locks. Critically, the SpinLock structure | |
4438 // should have sufficient padding to avoid false-sharing and excessive | |
4439 // cache-coherency traffic. | |
4440 | |
4441 | |
4442 typedef volatile int SpinLockT ; | |
4443 | |
4444 void Thread::SpinAcquire (volatile int * adr, const char * LockName) { | |
4445 if (Atomic::cmpxchg (1, adr, 0) == 0) { | |
4446 return ; // normal fast-path return | |
4447 } | |
4448 | |
4449 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy. | |
4450 TEVENT (SpinAcquire - ctx) ; | |
4451 int ctr = 0 ; | |
4452 int Yields = 0 ; | |
0 | 4453 for (;;) { |
1878 | 4454 while (*adr != 0) { |
4455 ++ctr ; | |
4456 if ((ctr & 0xFFF) == 0 || !os::is_MP()) { | |
4457 if (Yields > 5) { | |
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0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
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parents:
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diff
changeset
|
4458 os::naked_short_sleep(1); |
1878 | 4459 } else { |
4460 os::NakedYield() ; | |
4461 ++Yields ; | |
4462 } | |
4463 } else { | |
4464 SpinPause() ; | |
0 | 4465 } |
1878 | 4466 } |
4467 if (Atomic::cmpxchg (1, adr, 0) == 0) return ; | |
0 | 4468 } |
4469 } | |
4470 | |
1878 | 4471 void Thread::SpinRelease (volatile int * adr) { |
4472 assert (*adr != 0, "invariant") ; | |
4473 OrderAccess::fence() ; // guarantee at least release consistency. | |
4474 // Roach-motel semantics. | |
4475 // It's safe if subsequent LDs and STs float "up" into the critical section, | |
4476 // but prior LDs and STs within the critical section can't be allowed | |
4477 // to reorder or float past the ST that releases the lock. | |
4478 *adr = 0 ; | |
0 | 4479 } |
4480 | |
1878 | 4481 // muxAcquire and muxRelease: |
4482 // | |
4483 // * muxAcquire and muxRelease support a single-word lock-word construct. | |
4484 // The LSB of the word is set IFF the lock is held. | |
4485 // The remainder of the word points to the head of a singly-linked list | |
4486 // of threads blocked on the lock. | |
4487 // | |
4488 // * The current implementation of muxAcquire-muxRelease uses its own | |
4489 // dedicated Thread._MuxEvent instance. If we're interested in | |
4490 // minimizing the peak number of extant ParkEvent instances then | |
4491 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long | |
4492 // as certain invariants were satisfied. Specifically, care would need | |
4493 // to be taken with regards to consuming unpark() "permits". | |
4494 // A safe rule of thumb is that a thread would never call muxAcquire() | |
4495 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently | |
4496 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could | |
4497 // consume an unpark() permit intended for monitorenter, for instance. | |
4498 // One way around this would be to widen the restricted-range semaphore | |
4499 // implemented in park(). Another alternative would be to provide | |
4500 // multiple instances of the PlatformEvent() for each thread. One | |
4501 // instance would be dedicated to muxAcquire-muxRelease, for instance. | |
4502 // | |
4503 // * Usage: | |
4504 // -- Only as leaf locks | |
4505 // -- for short-term locking only as muxAcquire does not perform | |
4506 // thread state transitions. | |
4507 // | |
4508 // Alternatives: | |
4509 // * We could implement muxAcquire and muxRelease with MCS or CLH locks | |
4510 // but with parking or spin-then-park instead of pure spinning. | |
4511 // * Use Taura-Oyama-Yonenzawa locks. | |
4512 // * It's possible to construct a 1-0 lock if we encode the lockword as | |
4513 // (List,LockByte). Acquire will CAS the full lockword while Release | |
4514 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so | |
4515 // acquiring threads use timers (ParkTimed) to detect and recover from | |
4516 // the stranding window. Thread/Node structures must be aligned on 256-byte | |
4517 // boundaries by using placement-new. | |
4518 // * Augment MCS with advisory back-link fields maintained with CAS(). | |
4519 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. | |
4520 // The validity of the backlinks must be ratified before we trust the value. | |
4521 // If the backlinks are invalid the exiting thread must back-track through the | |
4522 // the forward links, which are always trustworthy. | |
4523 // * Add a successor indication. The LockWord is currently encoded as | |
4524 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable | |
4525 // to provide the usual futile-wakeup optimization. | |
4526 // See RTStt for details. | |
4527 // * Consider schedctl.sc_nopreempt to cover the critical section. | |
4528 // | |
4529 | |
4530 | |
4531 typedef volatile intptr_t MutexT ; // Mux Lock-word | |
4532 enum MuxBits { LOCKBIT = 1 } ; | |
4533 | |
4534 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { | |
4535 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4536 if (w == 0) return ; | |
4537 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4538 return ; | |
4539 } | |
4540 | |
4541 TEVENT (muxAcquire - Contention) ; | |
4542 ParkEvent * const Self = Thread::current()->_MuxEvent ; | |
4543 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; | |
0 | 4544 for (;;) { |
1878 | 4545 int its = (os::is_MP() ? 100 : 0) + 1 ; |
4546 | |
4547 // Optional spin phase: spin-then-park strategy | |
4548 while (--its >= 0) { | |
4549 w = *Lock ; | |
4550 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4551 return ; | |
4552 } | |
4553 } | |
4554 | |
4555 Self->reset() ; | |
4556 Self->OnList = intptr_t(Lock) ; | |
4557 // The following fence() isn't _strictly necessary as the subsequent | |
4558 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4559 OrderAccess::fence(); | |
4560 for (;;) { | |
4561 w = *Lock ; | |
4562 if ((w & LOCKBIT) == 0) { | |
4563 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4564 Self->OnList = 0 ; // hygiene - allows stronger asserts | |
4565 return ; | |
4566 } | |
4567 continue ; // Interference -- *Lock changed -- Just retry | |
0 | 4568 } |
1878 | 4569 assert (w & LOCKBIT, "invariant") ; |
4570 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4571 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; | |
4572 } | |
4573 | |
4574 while (Self->OnList != 0) { | |
4575 Self->park() ; | |
4576 } | |
0 | 4577 } |
4578 } | |
4579 | |
1878 | 4580 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
4581 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
4582 if (w == 0) return ; | |
4583 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4584 return ; | |
4585 } | |
4586 | |
4587 TEVENT (muxAcquire - Contention) ; | |
4588 ParkEvent * ReleaseAfter = NULL ; | |
4589 if (ev == NULL) { | |
4590 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; | |
4591 } | |
4592 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; | |
4593 for (;;) { | |
4594 guarantee (ev->OnList == 0, "invariant") ; | |
4595 int its = (os::is_MP() ? 100 : 0) + 1 ; | |
4596 | |
4597 // Optional spin phase: spin-then-park strategy | |
4598 while (--its >= 0) { | |
4599 w = *Lock ; | |
4600 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4601 if (ReleaseAfter != NULL) { | |
4602 ParkEvent::Release (ReleaseAfter) ; | |
4603 } | |
4604 return ; | |
4605 } | |
4606 } | |
4607 | |
4608 ev->reset() ; | |
4609 ev->OnList = intptr_t(Lock) ; | |
4610 // The following fence() isn't _strictly necessary as the subsequent | |
4611 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
4612 OrderAccess::fence(); | |
4613 for (;;) { | |
4614 w = *Lock ; | |
4615 if ((w & LOCKBIT) == 0) { | |
4616 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
4617 ev->OnList = 0 ; | |
4618 // We call ::Release while holding the outer lock, thus | |
4619 // artificially lengthening the critical section. | |
4620 // Consider deferring the ::Release() until the subsequent unlock(), | |
4621 // after we've dropped the outer lock. | |
4622 if (ReleaseAfter != NULL) { | |
4623 ParkEvent::Release (ReleaseAfter) ; | |
4624 } | |
4625 return ; | |
4626 } | |
4627 continue ; // Interference -- *Lock changed -- Just retry | |
4628 } | |
4629 assert (w & LOCKBIT, "invariant") ; | |
4630 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
4631 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; | |
4632 } | |
4633 | |
4634 while (ev->OnList != 0) { | |
4635 ev->park() ; | |
4636 } | |
4637 } | |
4638 } | |
4639 | |
4640 // Release() must extract a successor from the list and then wake that thread. | |
4641 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme | |
4642 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based | |
4643 // Release() would : | |
4644 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. | |
4645 // (B) Extract a successor from the private list "in-hand" | |
4646 // (C) attempt to CAS() the residual back into *Lock over null. | |
4647 // If there were any newly arrived threads and the CAS() would fail. | |
4648 // In that case Release() would detach the RATs, re-merge the list in-hand | |
4649 // with the RATs and repeat as needed. Alternately, Release() might | |
4650 // detach and extract a successor, but then pass the residual list to the wakee. | |
4651 // The wakee would be responsible for reattaching and remerging before it | |
4652 // competed for the lock. | |
4653 // | |
4654 // Both "pop" and DMR are immune from ABA corruption -- there can be | |
4655 // multiple concurrent pushers, but only one popper or detacher. | |
4656 // This implementation pops from the head of the list. This is unfair, | |
4657 // but tends to provide excellent throughput as hot threads remain hot. | |
4658 // (We wake recently run threads first). | |
4659 | |
4660 void Thread::muxRelease (volatile intptr_t * Lock) { | |
4661 for (;;) { | |
4662 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; | |
4663 assert (w & LOCKBIT, "invariant") ; | |
4664 if (w == LOCKBIT) return ; | |
4665 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; | |
4666 assert (List != NULL, "invariant") ; | |
4667 assert (List->OnList == intptr_t(Lock), "invariant") ; | |
4668 ParkEvent * nxt = List->ListNext ; | |
4669 | |
4670 // The following CAS() releases the lock and pops the head element. | |
4671 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { | |
4672 continue ; | |
4673 } | |
4674 List->OnList = 0 ; | |
4675 OrderAccess::fence() ; | |
4676 List->unpark () ; | |
4677 return ; | |
4678 } | |
4679 } | |
4680 | |
4681 | |
0 | 4682 void Threads::verify() { |
4683 ALL_JAVA_THREADS(p) { | |
4684 p->verify(); | |
4685 } | |
4686 VMThread* thread = VMThread::vm_thread(); | |
4687 if (thread != NULL) thread->verify(); | |
4688 } |