Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.cpp @ 21559:be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Thu, 28 May 2015 15:36:48 +0200 |
| parents | 7848fc12602b |
| children | 47bebae7454f |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/classLoader.hpp" | |
| 27 #include "classfile/javaClasses.hpp" | |
| 28 #include "classfile/systemDictionary.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "code/scopeDesc.hpp" | |
| 31 #include "compiler/compileBroker.hpp" | |
|
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32 #ifdef JVMCI |
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33 #include "jvmci/jvmciCompiler.hpp" |
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34 #include "jvmci/jvmciRuntime.hpp" |
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35 #endif |
| 1972 | 36 #include "interpreter/interpreter.hpp" |
| 37 #include "interpreter/linkResolver.hpp" | |
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38 #include "interpreter/oopMapCache.hpp" |
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39 #include "jvmtifiles/jvmtiEnv.hpp" |
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40 #include "memory/gcLocker.inline.hpp" |
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41 #include "memory/metaspaceShared.hpp" |
| 1972 | 42 #include "memory/oopFactory.hpp" |
| 43 #include "memory/universe.inline.hpp" | |
| 44 #include "oops/instanceKlass.hpp" | |
| 45 #include "oops/objArrayOop.hpp" | |
| 46 #include "oops/oop.inline.hpp" | |
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47 #include "oops/symbol.hpp" |
| 1972 | 48 #include "prims/jvm_misc.hpp" |
| 49 #include "prims/jvmtiExport.hpp" | |
| 50 #include "prims/jvmtiThreadState.hpp" | |
| 51 #include "prims/privilegedStack.hpp" | |
| 52 #include "runtime/arguments.hpp" | |
| 53 #include "runtime/biasedLocking.hpp" | |
| 54 #include "runtime/deoptimization.hpp" | |
| 55 #include "runtime/fprofiler.hpp" | |
| 56 #include "runtime/frame.inline.hpp" | |
| 57 #include "runtime/init.hpp" | |
| 58 #include "runtime/interfaceSupport.hpp" | |
| 59 #include "runtime/java.hpp" | |
| 60 #include "runtime/javaCalls.hpp" | |
| 61 #include "runtime/jniPeriodicChecker.hpp" | |
| 62 #include "runtime/memprofiler.hpp" | |
| 63 #include "runtime/mutexLocker.hpp" | |
| 64 #include "runtime/objectMonitor.hpp" | |
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65 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 66 #include "runtime/osThread.hpp" |
| 67 #include "runtime/safepoint.hpp" | |
| 68 #include "runtime/sharedRuntime.hpp" | |
| 69 #include "runtime/statSampler.hpp" | |
| 70 #include "runtime/stubRoutines.hpp" | |
| 71 #include "runtime/task.hpp" | |
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72 #include "runtime/thread.inline.hpp" |
| 1972 | 73 #include "runtime/threadCritical.hpp" |
| 74 #include "runtime/threadLocalStorage.hpp" | |
| 75 #include "runtime/vframe.hpp" | |
| 76 #include "runtime/vframeArray.hpp" | |
| 77 #include "runtime/vframe_hp.hpp" | |
| 78 #include "runtime/vmThread.hpp" | |
| 79 #include "runtime/vm_operations.hpp" | |
| 80 #include "services/attachListener.hpp" | |
| 81 #include "services/management.hpp" | |
| 6197 | 82 #include "services/memTracker.hpp" |
| 1972 | 83 #include "services/threadService.hpp" |
| 10405 | 84 #include "trace/tracing.hpp" |
| 85 #include "trace/traceMacros.hpp" | |
| 1972 | 86 #include "utilities/defaultStream.hpp" |
| 87 #include "utilities/dtrace.hpp" | |
| 88 #include "utilities/events.hpp" | |
| 89 #include "utilities/preserveException.hpp" | |
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90 #include "utilities/macros.hpp" |
| 1972 | 91 #ifdef TARGET_OS_FAMILY_linux |
| 92 # include "os_linux.inline.hpp" | |
| 93 #endif | |
| 94 #ifdef TARGET_OS_FAMILY_solaris | |
| 95 # include "os_solaris.inline.hpp" | |
| 96 #endif | |
| 97 #ifdef TARGET_OS_FAMILY_windows | |
| 98 # include "os_windows.inline.hpp" | |
| 99 #endif | |
| 3960 | 100 #ifdef TARGET_OS_FAMILY_bsd |
| 101 # include "os_bsd.inline.hpp" | |
| 102 #endif | |
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103 #if INCLUDE_ALL_GCS |
| 1972 | 104 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" |
| 105 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
| 106 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
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107 #endif // INCLUDE_ALL_GCS |
| 1972 | 108 #ifdef COMPILER1 |
| 109 #include "c1/c1_Compiler.hpp" | |
| 110 #endif | |
| 111 #ifdef COMPILER2 | |
| 112 #include "opto/c2compiler.hpp" | |
| 113 #include "opto/idealGraphPrinter.hpp" | |
| 114 #endif | |
| 17780 | 115 #if INCLUDE_RTM_OPT |
| 116 #include "runtime/rtmLocking.hpp" | |
| 117 #endif | |
| 0 | 118 |
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119 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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120 |
| 0 | 121 #ifdef DTRACE_ENABLED |
| 122 | |
| 123 // Only bother with this argument setup if dtrace is available | |
| 124 | |
| 4006 | 125 #ifndef USDT2 |
| 0 | 126 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
| 127 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); | |
| 128 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, | |
| 129 intptr_t, intptr_t, bool); | |
| 130 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, | |
| 131 intptr_t, intptr_t, bool); | |
| 132 | |
| 133 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
| 134 { \ | |
| 135 ResourceMark rm(this); \ | |
| 136 int len = 0; \ | |
| 137 const char* name = (javathread)->get_thread_name(); \ | |
| 138 len = strlen(name); \ | |
| 139 HS_DTRACE_PROBE5(hotspot, thread__##probe, \ | |
| 140 name, len, \ | |
| 141 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
| 142 (javathread)->osthread()->thread_id(), \ | |
| 143 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
| 144 } | |
| 145 | |
| 4006 | 146 #else /* USDT2 */ |
| 147 | |
| 148 #define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START | |
| 149 #define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP | |
| 150 | |
| 151 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
| 152 { \ | |
| 153 ResourceMark rm(this); \ | |
| 154 int len = 0; \ | |
| 155 const char* name = (javathread)->get_thread_name(); \ | |
| 156 len = strlen(name); \ | |
| 157 HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ | |
| 158 (char *) name, len, \ | |
| 159 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
| 160 (uintptr_t) (javathread)->osthread()->thread_id(), \ | |
| 161 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
| 162 } | |
| 163 | |
| 164 #endif /* USDT2 */ | |
| 165 | |
| 0 | 166 #else // ndef DTRACE_ENABLED |
| 167 | |
| 168 #define DTRACE_THREAD_PROBE(probe, javathread) | |
| 169 | |
| 170 #endif // ndef DTRACE_ENABLED | |
| 171 | |
| 6197 | 172 |
| 0 | 173 // Class hierarchy |
| 174 // - Thread | |
| 175 // - VMThread | |
| 176 // - WatcherThread | |
| 177 // - ConcurrentMarkSweepThread | |
| 178 // - JavaThread | |
| 179 // - CompilerThread | |
| 180 | |
| 181 // ======= Thread ======== | |
| 182 // Support for forcing alignment of thread objects for biased locking | |
| 6197 | 183 void* Thread::allocate(size_t size, bool throw_excpt, MEMFLAGS flags) { |
| 0 | 184 if (UseBiasedLocking) { |
| 185 const int alignment = markOopDesc::biased_lock_alignment; | |
| 186 size_t aligned_size = size + (alignment - sizeof(intptr_t)); | |
| 6197 | 187 void* real_malloc_addr = throw_excpt? AllocateHeap(aligned_size, flags, CURRENT_PC) |
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188 : AllocateHeap(aligned_size, flags, CURRENT_PC, |
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189 AllocFailStrategy::RETURN_NULL); |
| 0 | 190 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); |
| 191 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= | |
| 192 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), | |
| 193 "JavaThread alignment code overflowed allocated storage"); | |
| 194 if (TraceBiasedLocking) { | |
| 195 if (aligned_addr != real_malloc_addr) | |
| 196 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, | |
| 197 real_malloc_addr, aligned_addr); | |
| 198 } | |
| 199 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; | |
| 200 return aligned_addr; | |
| 201 } else { | |
| 6197 | 202 return throw_excpt? AllocateHeap(size, flags, CURRENT_PC) |
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203 : AllocateHeap(size, flags, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
| 0 | 204 } |
| 205 } | |
| 206 | |
| 207 void Thread::operator delete(void* p) { | |
| 208 if (UseBiasedLocking) { | |
| 209 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; | |
| 6197 | 210 FreeHeap(real_malloc_addr, mtThread); |
| 0 | 211 } else { |
| 6197 | 212 FreeHeap(p, mtThread); |
| 0 | 213 } |
| 214 } | |
| 215 | |
| 216 | |
| 217 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, | |
| 218 // JavaThread | |
| 219 | |
| 220 | |
| 221 Thread::Thread() { | |
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222 // stack and get_thread |
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223 set_stack_base(NULL); |
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224 set_stack_size(0); |
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225 set_self_raw_id(0); |
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226 set_lgrp_id(-1); |
| 0 | 227 |
| 228 // allocated data structures | |
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229 set_osthread(NULL); |
| 6197 | 230 set_resource_area(new (mtThread)ResourceArea()); |
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231 DEBUG_ONLY(_current_resource_mark = NULL;) |
| 6197 | 232 set_handle_area(new (mtThread) HandleArea(NULL)); |
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233 set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(30, true)); |
| 0 | 234 set_active_handles(NULL); |
| 235 set_free_handle_block(NULL); | |
| 236 set_last_handle_mark(NULL); | |
| 237 | |
| 238 // This initial value ==> never claimed. | |
| 239 _oops_do_parity = 0; | |
| 240 | |
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241 _metadata_on_stack_buffer = NULL; |
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242 |
| 0 | 243 // the handle mark links itself to last_handle_mark |
| 10135 | 244 new HandleMark(this); |
| 245 | |
| 0 | 246 // plain initialization |
| 247 debug_only(_owned_locks = NULL;) | |
| 248 debug_only(_allow_allocation_count = 0;) | |
| 249 NOT_PRODUCT(_allow_safepoint_count = 0;) | |
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250 NOT_PRODUCT(_skip_gcalot = false;) |
| 0 | 251 _jvmti_env_iteration_count = 0; |
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252 set_allocated_bytes(0); |
| 0 | 253 _vm_operation_started_count = 0; |
| 254 _vm_operation_completed_count = 0; | |
| 255 _current_pending_monitor = NULL; | |
| 256 _current_pending_monitor_is_from_java = true; | |
| 257 _current_waiting_monitor = NULL; | |
| 258 _num_nested_signal = 0; | |
| 259 omFreeList = NULL ; | |
| 260 omFreeCount = 0 ; | |
| 261 omFreeProvision = 32 ; | |
| 1587 | 262 omInUseList = NULL ; |
| 263 omInUseCount = 0 ; | |
| 0 | 264 |
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265 #ifdef ASSERT |
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266 _visited_for_critical_count = false; |
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267 #endif |
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268 |
| 0 | 269 _SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true); |
| 270 _suspend_flags = 0; | |
| 271 | |
| 272 // thread-specific hashCode stream generator state - Marsaglia shift-xor form | |
| 273 _hashStateX = os::random() ; | |
| 274 _hashStateY = 842502087 ; | |
| 275 _hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ; | |
| 276 _hashStateW = 273326509 ; | |
| 277 | |
| 278 _OnTrap = 0 ; | |
| 279 _schedctl = NULL ; | |
| 280 _Stalled = 0 ; | |
| 281 _TypeTag = 0x2BAD ; | |
| 282 | |
| 283 // Many of the following fields are effectively final - immutable | |
| 284 // Note that nascent threads can't use the Native Monitor-Mutex | |
| 285 // construct until the _MutexEvent is initialized ... | |
| 286 // CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents | |
| 287 // we might instead use a stack of ParkEvents that we could provision on-demand. | |
| 288 // The stack would act as a cache to avoid calls to ParkEvent::Allocate() | |
| 289 // and ::Release() | |
| 290 _ParkEvent = ParkEvent::Allocate (this) ; | |
| 291 _SleepEvent = ParkEvent::Allocate (this) ; | |
| 292 _MutexEvent = ParkEvent::Allocate (this) ; | |
| 293 _MuxEvent = ParkEvent::Allocate (this) ; | |
| 294 | |
| 295 #ifdef CHECK_UNHANDLED_OOPS | |
| 296 if (CheckUnhandledOops) { | |
| 297 _unhandled_oops = new UnhandledOops(this); | |
| 298 } | |
| 299 #endif // CHECK_UNHANDLED_OOPS | |
| 300 #ifdef ASSERT | |
| 301 if (UseBiasedLocking) { | |
| 302 assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed"); | |
| 303 assert(this == _real_malloc_address || | |
| 304 this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment), | |
| 305 "bug in forced alignment of thread objects"); | |
| 306 } | |
| 307 #endif /* ASSERT */ | |
| 308 } | |
| 309 | |
| 310 void Thread::initialize_thread_local_storage() { | |
| 311 // Note: Make sure this method only calls | |
| 312 // non-blocking operations. Otherwise, it might not work | |
| 313 // with the thread-startup/safepoint interaction. | |
| 314 | |
| 315 // During Java thread startup, safepoint code should allow this | |
| 316 // method to complete because it may need to allocate memory to | |
| 317 // store information for the new thread. | |
| 318 | |
| 319 // initialize structure dependent on thread local storage | |
| 320 ThreadLocalStorage::set_thread(this); | |
| 321 } | |
| 322 | |
| 323 void Thread::record_stack_base_and_size() { | |
| 324 set_stack_base(os::current_stack_base()); | |
| 325 set_stack_size(os::current_stack_size()); | |
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326 if (is_Java_thread()) { |
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327 ((JavaThread*) this)->set_stack_overflow_limit(); |
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328 } |
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329 // CR 7190089: on Solaris, primordial thread's stack is adjusted |
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330 // in initialize_thread(). Without the adjustment, stack size is |
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331 // incorrect if stack is set to unlimited (ulimit -s unlimited). |
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332 // So far, only Solaris has real implementation of initialize_thread(). |
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333 // |
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334 // set up any platform-specific state. |
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335 os::initialize_thread(this); |
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336 |
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337 #if INCLUDE_NMT |
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338 // record thread's native stack, stack grows downward |
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339 address stack_low_addr = stack_base() - stack_size(); |
| 20360 | 340 MemTracker::record_thread_stack(stack_low_addr, stack_size()); |
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341 #endif // INCLUDE_NMT |
| 0 | 342 } |
| 343 | |
| 344 | |
| 345 Thread::~Thread() { | |
| 346 // Reclaim the objectmonitors from the omFreeList of the moribund thread. | |
| 347 ObjectSynchronizer::omFlush (this) ; | |
| 348 | |
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349 EVENT_THREAD_DESTRUCT(this); |
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350 |
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351 // stack_base can be NULL if the thread is never started or exited before |
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352 // record_stack_base_and_size called. Although, we would like to ensure |
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353 // that all started threads do call record_stack_base_and_size(), there is |
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354 // not proper way to enforce that. |
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355 #if INCLUDE_NMT |
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356 if (_stack_base != NULL) { |
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357 address low_stack_addr = stack_base() - stack_size(); |
| 20360 | 358 MemTracker::release_thread_stack(low_stack_addr, stack_size()); |
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359 #ifdef ASSERT |
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360 set_stack_base(NULL); |
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361 #endif |
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362 } |
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363 #endif // INCLUDE_NMT |
| 6197 | 364 |
| 0 | 365 // deallocate data structures |
| 366 delete resource_area(); | |
| 367 // since the handle marks are using the handle area, we have to deallocated the root | |
| 368 // handle mark before deallocating the thread's handle area, | |
| 369 assert(last_handle_mark() != NULL, "check we have an element"); | |
| 10135 | 370 delete last_handle_mark(); |
| 371 assert(last_handle_mark() == NULL, "check we have reached the end"); | |
| 0 | 372 |
| 373 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. | |
| 374 // We NULL out the fields for good hygiene. | |
| 375 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; | |
| 376 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; | |
| 377 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; | |
| 378 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; | |
| 379 | |
| 380 delete handle_area(); | |
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381 delete metadata_handles(); |
| 0 | 382 |
| 383 // osthread() can be NULL, if creation of thread failed. | |
| 384 if (osthread() != NULL) os::free_thread(osthread()); | |
| 385 | |
| 386 delete _SR_lock; | |
| 387 | |
| 388 // clear thread local storage if the Thread is deleting itself | |
| 389 if (this == Thread::current()) { | |
| 390 ThreadLocalStorage::set_thread(NULL); | |
| 391 } else { | |
| 392 // In the case where we're not the current thread, invalidate all the | |
| 393 // caches in case some code tries to get the current thread or the | |
| 394 // thread that was destroyed, and gets stale information. | |
| 395 ThreadLocalStorage::invalidate_all(); | |
| 396 } | |
| 397 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) | |
| 398 } | |
| 399 | |
| 400 // NOTE: dummy function for assertion purpose. | |
| 401 void Thread::run() { | |
| 402 ShouldNotReachHere(); | |
| 403 } | |
| 404 | |
| 405 #ifdef ASSERT | |
| 406 // Private method to check for dangling thread pointer | |
| 407 void check_for_dangling_thread_pointer(Thread *thread) { | |
| 408 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 409 "possibility of dangling Thread pointer"); | |
| 410 } | |
| 411 #endif | |
| 412 | |
| 413 | |
| 414 #ifndef PRODUCT | |
| 415 // Tracing method for basic thread operations | |
| 416 void Thread::trace(const char* msg, const Thread* const thread) { | |
| 417 if (!TraceThreadEvents) return; | |
| 418 ResourceMark rm; | |
| 419 ThreadCritical tc; | |
| 420 const char *name = "non-Java thread"; | |
| 421 int prio = -1; | |
| 422 if (thread->is_Java_thread() | |
| 423 && !thread->is_Compiler_thread()) { | |
| 424 // The Threads_lock must be held to get information about | |
| 425 // this thread but may not be in some situations when | |
| 426 // tracing thread events. | |
| 427 bool release_Threads_lock = false; | |
| 428 if (!Threads_lock->owned_by_self()) { | |
| 429 Threads_lock->lock(); | |
| 430 release_Threads_lock = true; | |
| 431 } | |
| 432 JavaThread* jt = (JavaThread *)thread; | |
| 433 name = (char *)jt->get_thread_name(); | |
| 434 oop thread_oop = jt->threadObj(); | |
| 435 if (thread_oop != NULL) { | |
| 436 prio = java_lang_Thread::priority(thread_oop); | |
| 437 } | |
| 438 if (release_Threads_lock) { | |
| 439 Threads_lock->unlock(); | |
| 440 } | |
| 441 } | |
| 442 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); | |
| 443 } | |
| 444 #endif | |
| 445 | |
| 446 | |
| 447 ThreadPriority Thread::get_priority(const Thread* const thread) { | |
| 448 trace("get priority", thread); | |
| 449 ThreadPriority priority; | |
| 450 // Can return an error! | |
| 451 (void)os::get_priority(thread, priority); | |
| 452 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); | |
| 453 return priority; | |
| 454 } | |
| 455 | |
| 456 void Thread::set_priority(Thread* thread, ThreadPriority priority) { | |
| 457 trace("set priority", thread); | |
| 458 debug_only(check_for_dangling_thread_pointer(thread);) | |
| 459 // Can return an error! | |
| 460 (void)os::set_priority(thread, priority); | |
| 461 } | |
| 462 | |
| 463 | |
| 464 void Thread::start(Thread* thread) { | |
| 465 trace("start", thread); | |
| 466 // Start is different from resume in that its safety is guaranteed by context or | |
| 467 // being called from a Java method synchronized on the Thread object. | |
| 468 if (!DisableStartThread) { | |
| 469 if (thread->is_Java_thread()) { | |
| 470 // Initialize the thread state to RUNNABLE before starting this thread. | |
| 471 // Can not set it after the thread started because we do not know the | |
| 472 // exact thread state at that time. It could be in MONITOR_WAIT or | |
| 473 // in SLEEPING or some other state. | |
| 474 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), | |
| 475 java_lang_Thread::RUNNABLE); | |
| 476 } | |
| 477 os::start_thread(thread); | |
| 478 } | |
| 479 } | |
| 480 | |
| 481 // Enqueue a VM_Operation to do the job for us - sometime later | |
| 482 void Thread::send_async_exception(oop java_thread, oop java_throwable) { | |
| 483 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); | |
| 484 VMThread::execute(vm_stop); | |
| 485 } | |
| 486 | |
| 487 | |
| 488 // | |
| 489 // Check if an external suspend request has completed (or has been | |
| 490 // cancelled). Returns true if the thread is externally suspended and | |
| 491 // false otherwise. | |
| 492 // | |
| 493 // The bits parameter returns information about the code path through | |
| 494 // the routine. Useful for debugging: | |
| 495 // | |
| 496 // set in is_ext_suspend_completed(): | |
| 497 // 0x00000001 - routine was entered | |
| 498 // 0x00000010 - routine return false at end | |
| 499 // 0x00000100 - thread exited (return false) | |
| 500 // 0x00000200 - suspend request cancelled (return false) | |
| 501 // 0x00000400 - thread suspended (return true) | |
| 502 // 0x00001000 - thread is in a suspend equivalent state (return true) | |
| 503 // 0x00002000 - thread is native and walkable (return true) | |
| 504 // 0x00004000 - thread is native_trans and walkable (needed retry) | |
| 505 // | |
| 506 // set in wait_for_ext_suspend_completion(): | |
| 507 // 0x00010000 - routine was entered | |
| 508 // 0x00020000 - suspend request cancelled before loop (return false) | |
| 509 // 0x00040000 - thread suspended before loop (return true) | |
| 510 // 0x00080000 - suspend request cancelled in loop (return false) | |
| 511 // 0x00100000 - thread suspended in loop (return true) | |
| 512 // 0x00200000 - suspend not completed during retry loop (return false) | |
| 513 // | |
| 514 | |
| 515 // Helper class for tracing suspend wait debug bits. | |
| 516 // | |
| 517 // 0x00000100 indicates that the target thread exited before it could | |
| 518 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and | |
| 519 // 0x00080000 each indicate a cancelled suspend request so they don't | |
| 520 // count as wait failures either. | |
| 521 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) | |
| 522 | |
| 523 class TraceSuspendDebugBits : public StackObj { | |
| 524 private: | |
| 525 JavaThread * jt; | |
| 526 bool is_wait; | |
| 527 bool called_by_wait; // meaningful when !is_wait | |
| 528 uint32_t * bits; | |
| 529 | |
| 530 public: | |
| 531 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, | |
| 532 uint32_t *_bits) { | |
| 533 jt = _jt; | |
| 534 is_wait = _is_wait; | |
| 535 called_by_wait = _called_by_wait; | |
| 536 bits = _bits; | |
| 537 } | |
| 538 | |
| 539 ~TraceSuspendDebugBits() { | |
| 540 if (!is_wait) { | |
| 541 #if 1 | |
| 542 // By default, don't trace bits for is_ext_suspend_completed() calls. | |
| 543 // That trace is very chatty. | |
| 544 return; | |
| 545 #else | |
| 546 if (!called_by_wait) { | |
| 547 // If tracing for is_ext_suspend_completed() is enabled, then only | |
| 548 // trace calls to it from wait_for_ext_suspend_completion() | |
| 549 return; | |
| 550 } | |
| 551 #endif | |
| 552 } | |
| 553 | |
| 554 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { | |
| 555 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { | |
| 556 MutexLocker ml(Threads_lock); // needed for get_thread_name() | |
| 557 ResourceMark rm; | |
| 558 | |
| 559 tty->print_cr( | |
| 560 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", | |
| 561 jt->get_thread_name(), *bits); | |
| 562 | |
| 563 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); | |
| 564 } | |
| 565 } | |
| 566 } | |
| 567 }; | |
| 568 #undef DEBUG_FALSE_BITS | |
| 569 | |
| 570 | |
| 571 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { | |
| 572 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); | |
| 573 | |
| 574 bool did_trans_retry = false; // only do thread_in_native_trans retry once | |
| 575 bool do_trans_retry; // flag to force the retry | |
| 576 | |
| 577 *bits |= 0x00000001; | |
| 578 | |
| 579 do { | |
| 580 do_trans_retry = false; | |
| 581 | |
| 582 if (is_exiting()) { | |
| 583 // Thread is in the process of exiting. This is always checked | |
| 584 // first to reduce the risk of dereferencing a freed JavaThread. | |
| 585 *bits |= 0x00000100; | |
| 586 return false; | |
| 587 } | |
| 588 | |
| 589 if (!is_external_suspend()) { | |
| 590 // Suspend request is cancelled. This is always checked before | |
| 591 // is_ext_suspended() to reduce the risk of a rogue resume | |
| 592 // confusing the thread that made the suspend request. | |
| 593 *bits |= 0x00000200; | |
| 594 return false; | |
| 595 } | |
| 596 | |
| 597 if (is_ext_suspended()) { | |
| 598 // thread is suspended | |
| 599 *bits |= 0x00000400; | |
| 600 return true; | |
| 601 } | |
| 602 | |
| 603 // Now that we no longer do hard suspends of threads running | |
| 604 // native code, the target thread can be changing thread state | |
| 605 // while we are in this routine: | |
| 606 // | |
| 607 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked | |
| 608 // | |
| 609 // We save a copy of the thread state as observed at this moment | |
| 610 // and make our decision about suspend completeness based on the | |
| 611 // copy. This closes the race where the thread state is seen as | |
| 612 // _thread_in_native_trans in the if-thread_blocked check, but is | |
| 613 // seen as _thread_blocked in if-thread_in_native_trans check. | |
| 614 JavaThreadState save_state = thread_state(); | |
| 615 | |
| 616 if (save_state == _thread_blocked && is_suspend_equivalent()) { | |
| 617 // If the thread's state is _thread_blocked and this blocking | |
| 618 // condition is known to be equivalent to a suspend, then we can | |
| 619 // consider the thread to be externally suspended. This means that | |
| 620 // the code that sets _thread_blocked has been modified to do | |
| 621 // self-suspension if the blocking condition releases. We also | |
| 622 // used to check for CONDVAR_WAIT here, but that is now covered by | |
| 623 // the _thread_blocked with self-suspension check. | |
| 624 // | |
| 625 // Return true since we wouldn't be here unless there was still an | |
| 626 // external suspend request. | |
| 627 *bits |= 0x00001000; | |
| 628 return true; | |
| 629 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) { | |
| 630 // Threads running native code will self-suspend on native==>VM/Java | |
| 631 // transitions. If its stack is walkable (should always be the case | |
| 632 // unless this function is called before the actual java_suspend() | |
| 633 // call), then the wait is done. | |
| 634 *bits |= 0x00002000; | |
| 635 return true; | |
| 636 } else if (!called_by_wait && !did_trans_retry && | |
| 637 save_state == _thread_in_native_trans && | |
| 638 frame_anchor()->walkable()) { | |
| 639 // The thread is transitioning from thread_in_native to another | |
| 640 // thread state. check_safepoint_and_suspend_for_native_trans() | |
| 641 // will force the thread to self-suspend. If it hasn't gotten | |
| 642 // there yet we may have caught the thread in-between the native | |
| 643 // code check above and the self-suspend. Lucky us. If we were | |
| 644 // called by wait_for_ext_suspend_completion(), then it | |
| 645 // will be doing the retries so we don't have to. | |
| 646 // | |
| 647 // Since we use the saved thread state in the if-statement above, | |
| 648 // there is a chance that the thread has already transitioned to | |
| 649 // _thread_blocked by the time we get here. In that case, we will | |
| 650 // make a single unnecessary pass through the logic below. This | |
| 651 // doesn't hurt anything since we still do the trans retry. | |
| 652 | |
| 653 *bits |= 0x00004000; | |
| 654 | |
| 655 // Once the thread leaves thread_in_native_trans for another | |
| 656 // thread state, we break out of this retry loop. We shouldn't | |
| 657 // need this flag to prevent us from getting back here, but | |
| 658 // sometimes paranoia is good. | |
| 659 did_trans_retry = true; | |
| 660 | |
| 661 // We wait for the thread to transition to a more usable state. | |
| 662 for (int i = 1; i <= SuspendRetryCount; i++) { | |
| 663 // We used to do an "os::yield_all(i)" call here with the intention | |
| 664 // that yielding would increase on each retry. However, the parameter | |
| 665 // is ignored on Linux which means the yield didn't scale up. Waiting | |
| 666 // on the SR_lock below provides a much more predictable scale up for | |
| 667 // the delay. It also provides a simple/direct point to check for any | |
| 668 // safepoint requests from the VMThread | |
| 669 | |
| 670 // temporarily drops SR_lock while doing wait with safepoint check | |
| 671 // (if we're a JavaThread - the WatcherThread can also call this) | |
| 672 // and increase delay with each retry | |
| 673 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
| 674 | |
| 675 // check the actual thread state instead of what we saved above | |
| 676 if (thread_state() != _thread_in_native_trans) { | |
| 677 // the thread has transitioned to another thread state so | |
| 678 // try all the checks (except this one) one more time. | |
| 679 do_trans_retry = true; | |
| 680 break; | |
| 681 } | |
| 682 } // end retry loop | |
| 683 | |
| 684 | |
| 685 } | |
| 686 } while (do_trans_retry); | |
| 687 | |
| 688 *bits |= 0x00000010; | |
| 689 return false; | |
| 690 } | |
| 691 | |
| 692 // | |
| 693 // Wait for an external suspend request to complete (or be cancelled). | |
| 694 // Returns true if the thread is externally suspended and false otherwise. | |
| 695 // | |
| 696 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, | |
| 697 uint32_t *bits) { | |
| 698 TraceSuspendDebugBits tsdb(this, true /* is_wait */, | |
| 699 false /* !called_by_wait */, bits); | |
| 700 | |
| 701 // local flag copies to minimize SR_lock hold time | |
| 702 bool is_suspended; | |
| 703 bool pending; | |
| 704 uint32_t reset_bits; | |
| 705 | |
| 706 // set a marker so is_ext_suspend_completed() knows we are the caller | |
| 707 *bits |= 0x00010000; | |
| 708 | |
| 709 // We use reset_bits to reinitialize the bits value at the top of | |
| 710 // each retry loop. This allows the caller to make use of any | |
| 711 // unused bits for their own marking purposes. | |
| 712 reset_bits = *bits; | |
| 713 | |
| 714 { | |
| 715 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 716 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
| 717 delay, bits); | |
| 718 pending = is_external_suspend(); | |
| 719 } | |
| 720 // must release SR_lock to allow suspension to complete | |
| 721 | |
| 722 if (!pending) { | |
| 723 // A cancelled suspend request is the only false return from | |
| 724 // is_ext_suspend_completed() that keeps us from entering the | |
| 725 // retry loop. | |
| 726 *bits |= 0x00020000; | |
| 727 return false; | |
| 728 } | |
| 729 | |
| 730 if (is_suspended) { | |
| 731 *bits |= 0x00040000; | |
| 732 return true; | |
| 733 } | |
| 734 | |
| 735 for (int i = 1; i <= retries; i++) { | |
| 736 *bits = reset_bits; // reinit to only track last retry | |
| 737 | |
| 738 // We used to do an "os::yield_all(i)" call here with the intention | |
| 739 // that yielding would increase on each retry. However, the parameter | |
| 740 // is ignored on Linux which means the yield didn't scale up. Waiting | |
| 741 // on the SR_lock below provides a much more predictable scale up for | |
| 742 // the delay. It also provides a simple/direct point to check for any | |
| 743 // safepoint requests from the VMThread | |
| 744 | |
| 745 { | |
| 746 MutexLocker ml(SR_lock()); | |
| 747 // wait with safepoint check (if we're a JavaThread - the WatcherThread | |
| 748 // can also call this) and increase delay with each retry | |
| 749 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
| 750 | |
| 751 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
| 752 delay, bits); | |
| 753 | |
| 754 // It is possible for the external suspend request to be cancelled | |
| 755 // (by a resume) before the actual suspend operation is completed. | |
| 756 // Refresh our local copy to see if we still need to wait. | |
| 757 pending = is_external_suspend(); | |
| 758 } | |
| 759 | |
| 760 if (!pending) { | |
| 761 // A cancelled suspend request is the only false return from | |
| 762 // is_ext_suspend_completed() that keeps us from staying in the | |
| 763 // retry loop. | |
| 764 *bits |= 0x00080000; | |
| 765 return false; | |
| 766 } | |
| 767 | |
| 768 if (is_suspended) { | |
| 769 *bits |= 0x00100000; | |
| 770 return true; | |
| 771 } | |
| 772 } // end retry loop | |
| 773 | |
| 774 // thread did not suspend after all our retries | |
| 775 *bits |= 0x00200000; | |
| 776 return false; | |
| 777 } | |
| 778 | |
| 779 #ifndef PRODUCT | |
| 780 void JavaThread::record_jump(address target, address instr, const char* file, int line) { | |
| 781 | |
| 782 // This should not need to be atomic as the only way for simultaneous | |
| 783 // updates is via interrupts. Even then this should be rare or non-existant | |
| 784 // and we don't care that much anyway. | |
| 785 | |
| 786 int index = _jmp_ring_index; | |
| 787 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); | |
| 788 _jmp_ring[index]._target = (intptr_t) target; | |
| 789 _jmp_ring[index]._instruction = (intptr_t) instr; | |
| 790 _jmp_ring[index]._file = file; | |
| 791 _jmp_ring[index]._line = line; | |
| 792 } | |
| 793 #endif /* PRODUCT */ | |
| 794 | |
| 795 // Called by flat profiler | |
| 796 // Callers have already called wait_for_ext_suspend_completion | |
| 797 // The assertion for that is currently too complex to put here: | |
| 798 bool JavaThread::profile_last_Java_frame(frame* _fr) { | |
| 799 bool gotframe = false; | |
| 800 // self suspension saves needed state. | |
| 801 if (has_last_Java_frame() && _anchor.walkable()) { | |
| 802 *_fr = pd_last_frame(); | |
| 803 gotframe = true; | |
| 804 } | |
| 805 return gotframe; | |
| 806 } | |
| 807 | |
| 808 void Thread::interrupt(Thread* thread) { | |
| 809 trace("interrupt", thread); | |
| 810 debug_only(check_for_dangling_thread_pointer(thread);) | |
| 811 os::interrupt(thread); | |
| 812 } | |
| 813 | |
| 814 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 815 trace("is_interrupted", thread); | |
| 816 debug_only(check_for_dangling_thread_pointer(thread);) | |
| 817 // Note: If clear_interrupted==false, this simply fetches and | |
| 818 // returns the value of the field osthread()->interrupted(). | |
| 819 return os::is_interrupted(thread, clear_interrupted); | |
| 820 } | |
| 821 | |
| 822 | |
| 823 // GC Support | |
| 824 bool Thread::claim_oops_do_par_case(int strong_roots_parity) { | |
| 825 jint thread_parity = _oops_do_parity; | |
| 826 if (thread_parity != strong_roots_parity) { | |
| 827 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); | |
|
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828 if (res == thread_parity) { |
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829 return true; |
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830 } else { |
| 0 | 831 guarantee(res == strong_roots_parity, "Or else what?"); |
|
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832 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
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833 "Should only fail when parallel."); |
| 0 | 834 return false; |
| 835 } | |
| 836 } | |
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837 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
| 0 | 838 "Should only fail when parallel."); |
| 839 return false; | |
| 840 } | |
| 841 | |
|
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842 void Thread::oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) { |
| 0 | 843 active_handles()->oops_do(f); |
| 844 // Do oop for ThreadShadow | |
| 845 f->do_oop((oop*)&_pending_exception); | |
|
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846 #ifdef JVMCI |
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847 f->do_oop((oop*)&_pending_failed_speculation); |
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848 #endif |
| 0 | 849 handle_area()->oops_do(f); |
| 850 } | |
| 851 | |
|
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852 void Thread::nmethods_do(CodeBlobClosure* cf) { |
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853 // no nmethods in a generic thread... |
| 0 | 854 } |
| 855 | |
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856 void Thread::metadata_do(void f(Metadata*)) { |
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857 if (metadata_handles() != NULL) { |
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858 for (int i = 0; i< metadata_handles()->length(); i++) { |
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859 f(metadata_handles()->at(i)); |
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860 } |
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861 } |
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862 } |
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863 |
| 0 | 864 void Thread::print_on(outputStream* st) const { |
| 865 // get_priority assumes osthread initialized | |
| 866 if (osthread() != NULL) { | |
| 6766 | 867 int os_prio; |
| 868 if (os::get_native_priority(this, &os_prio) == OS_OK) { | |
| 869 st->print("os_prio=%d ", os_prio); | |
| 870 } | |
| 871 st->print("tid=" INTPTR_FORMAT " ", this); | |
| 20393 | 872 ext().print_on(st); |
| 0 | 873 osthread()->print_on(st); |
| 874 } | |
| 875 debug_only(if (WizardMode) print_owned_locks_on(st);) | |
| 876 } | |
| 877 | |
| 878 // Thread::print_on_error() is called by fatal error handler. Don't use | |
| 879 // any lock or allocate memory. | |
| 880 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { | |
| 881 if (is_VM_thread()) st->print("VMThread"); | |
| 882 else if (is_Compiler_thread()) st->print("CompilerThread"); | |
| 883 else if (is_Java_thread()) st->print("JavaThread"); | |
| 884 else if (is_GC_task_thread()) st->print("GCTaskThread"); | |
| 885 else if (is_Watcher_thread()) st->print("WatcherThread"); | |
| 886 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); | |
| 887 else st->print("Thread"); | |
| 888 | |
| 889 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", | |
| 890 _stack_base - _stack_size, _stack_base); | |
| 891 | |
| 892 if (osthread()) { | |
| 893 st->print(" [id=%d]", osthread()->thread_id()); | |
| 894 } | |
| 895 } | |
| 896 | |
| 897 #ifdef ASSERT | |
| 898 void Thread::print_owned_locks_on(outputStream* st) const { | |
| 899 Monitor *cur = _owned_locks; | |
| 900 if (cur == NULL) { | |
| 901 st->print(" (no locks) "); | |
| 902 } else { | |
| 903 st->print_cr(" Locks owned:"); | |
| 904 while(cur) { | |
| 905 cur->print_on(st); | |
| 906 cur = cur->next(); | |
| 907 } | |
| 908 } | |
| 909 } | |
| 910 | |
| 911 static int ref_use_count = 0; | |
| 912 | |
| 913 bool Thread::owns_locks_but_compiled_lock() const { | |
| 914 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
| 915 if (cur != Compile_lock) return true; | |
| 916 } | |
| 917 return false; | |
| 918 } | |
| 919 | |
| 920 | |
| 921 #endif | |
| 922 | |
| 923 #ifndef PRODUCT | |
| 924 | |
| 925 // The flag: potential_vm_operation notifies if this particular safepoint state could potential | |
| 926 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that | |
| 927 // no threads which allow_vm_block's are held | |
| 928 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { | |
| 929 // Check if current thread is allowed to block at a safepoint | |
| 930 if (!(_allow_safepoint_count == 0)) | |
| 931 fatal("Possible safepoint reached by thread that does not allow it"); | |
| 932 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { | |
| 933 fatal("LEAF method calling lock?"); | |
| 934 } | |
| 935 | |
| 936 #ifdef ASSERT | |
| 937 if (potential_vm_operation && is_Java_thread() | |
| 938 && !Universe::is_bootstrapping()) { | |
| 939 // Make sure we do not hold any locks that the VM thread also uses. | |
| 940 // This could potentially lead to deadlocks | |
| 941 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
| 942 // Threads_lock is special, since the safepoint synchronization will not start before this is | |
| 943 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, | |
| 944 // since it is used to transfer control between JavaThreads and the VMThread | |
| 945 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! | |
| 946 if ( (cur->allow_vm_block() && | |
| 947 cur != Threads_lock && | |
| 948 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation | |
| 949 cur != VMOperationRequest_lock && | |
| 950 cur != VMOperationQueue_lock) || | |
| 951 cur->rank() == Mutex::special) { | |
|
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952 fatal(err_msg("Thread holding lock at safepoint that vm can block on: %s", cur->name())); |
| 0 | 953 } |
| 954 } | |
| 955 } | |
| 956 | |
| 957 if (GCALotAtAllSafepoints) { | |
| 958 // We could enter a safepoint here and thus have a gc | |
| 959 InterfaceSupport::check_gc_alot(); | |
| 960 } | |
| 961 #endif | |
| 962 } | |
| 963 #endif | |
| 964 | |
| 965 bool Thread::is_in_stack(address adr) const { | |
| 966 assert(Thread::current() == this, "is_in_stack can only be called from current thread"); | |
| 967 address end = os::current_stack_pointer(); | |
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968 // Allow non Java threads to call this without stack_base |
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969 if (_stack_base == NULL) return true; |
| 0 | 970 if (stack_base() >= adr && adr >= end) return true; |
| 971 | |
| 972 return false; | |
| 973 } | |
| 974 | |
| 975 | |
|
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976 bool Thread::is_in_usable_stack(address adr) const { |
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977 size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0; |
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978 size_t usable_stack_size = _stack_size - stack_guard_size; |
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979 |
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980 return ((adr < stack_base()) && (adr >= stack_base() - usable_stack_size)); |
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981 } |
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982 |
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983 |
| 0 | 984 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter |
| 985 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being | |
| 986 // used for compilation in the future. If that change is made, the need for these methods | |
| 987 // should be revisited, and they should be removed if possible. | |
| 988 | |
| 989 bool Thread::is_lock_owned(address adr) const { | |
|
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990 return on_local_stack(adr); |
| 0 | 991 } |
| 992 | |
| 993 bool Thread::set_as_starting_thread() { | |
| 994 // NOTE: this must be called inside the main thread. | |
| 995 return os::create_main_thread((JavaThread*)this); | |
| 996 } | |
| 997 | |
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998 static void initialize_class(Symbol* class_name, TRAPS) { |
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999 Klass* klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
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1000 InstanceKlass::cast(klass)->initialize(CHECK); |
| 0 | 1001 } |
| 1002 | |
| 1003 | |
| 1004 // Creates the initial ThreadGroup | |
| 1005 static Handle create_initial_thread_group(TRAPS) { | |
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1006 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
| 0 | 1007 instanceKlassHandle klass (THREAD, k); |
| 1008 | |
| 1009 Handle system_instance = klass->allocate_instance_handle(CHECK_NH); | |
| 1010 { | |
| 1011 JavaValue result(T_VOID); | |
| 1012 JavaCalls::call_special(&result, | |
| 1013 system_instance, | |
| 1014 klass, | |
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1015 vmSymbols::object_initializer_name(), |
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1016 vmSymbols::void_method_signature(), |
| 0 | 1017 CHECK_NH); |
| 1018 } | |
| 1019 Universe::set_system_thread_group(system_instance()); | |
| 1020 | |
| 1021 Handle main_instance = klass->allocate_instance_handle(CHECK_NH); | |
| 1022 { | |
| 1023 JavaValue result(T_VOID); | |
| 1024 Handle string = java_lang_String::create_from_str("main", CHECK_NH); | |
| 1025 JavaCalls::call_special(&result, | |
| 1026 main_instance, | |
| 1027 klass, | |
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1028 vmSymbols::object_initializer_name(), |
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1029 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 1030 system_instance, |
| 1031 string, | |
| 1032 CHECK_NH); | |
| 1033 } | |
| 1034 return main_instance; | |
| 1035 } | |
| 1036 | |
| 1037 // Creates the initial Thread | |
| 1038 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { | |
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1039 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
| 0 | 1040 instanceKlassHandle klass (THREAD, k); |
| 1041 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); | |
| 1042 | |
| 1043 java_lang_Thread::set_thread(thread_oop(), thread); | |
| 1044 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
| 1045 thread->set_threadObj(thread_oop()); | |
| 1046 | |
| 1047 Handle string = java_lang_String::create_from_str("main", CHECK_NULL); | |
| 1048 | |
| 1049 JavaValue result(T_VOID); | |
| 1050 JavaCalls::call_special(&result, thread_oop, | |
| 1051 klass, | |
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1052 vmSymbols::object_initializer_name(), |
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1053 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 1054 thread_group, |
| 1055 string, | |
| 1056 CHECK_NULL); | |
| 1057 return thread_oop(); | |
| 1058 } | |
| 1059 | |
| 1060 static void call_initializeSystemClass(TRAPS) { | |
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1061 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
| 0 | 1062 instanceKlassHandle klass (THREAD, k); |
| 1063 | |
| 1064 JavaValue result(T_VOID); | |
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1065 JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
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1066 vmSymbols::void_method_signature(), CHECK); |
| 0 | 1067 } |
| 1068 | |
| 6181 | 1069 char java_runtime_name[128] = ""; |
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1070 char java_runtime_version[128] = ""; |
| 6181 | 1071 |
| 1072 // extract the JRE name from sun.misc.Version.java_runtime_name | |
| 1073 static const char* get_java_runtime_name(TRAPS) { | |
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1074 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
| 6181 | 1075 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
| 1076 fieldDescriptor fd; | |
| 1077 bool found = k != NULL && | |
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1078 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_name_name(), |
| 6181 | 1079 vmSymbols::string_signature(), &fd); |
| 1080 if (found) { | |
| 1081 oop name_oop = k->java_mirror()->obj_field(fd.offset()); | |
| 1082 if (name_oop == NULL) | |
| 1083 return NULL; | |
| 1084 const char* name = java_lang_String::as_utf8_string(name_oop, | |
| 1085 java_runtime_name, | |
| 1086 sizeof(java_runtime_name)); | |
| 1087 return name; | |
| 1088 } else { | |
| 1089 return NULL; | |
| 1090 } | |
| 1091 } | |
| 1092 | |
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1093 // extract the JRE version from sun.misc.Version.java_runtime_version |
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1094 static const char* get_java_runtime_version(TRAPS) { |
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1095 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
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1096 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
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1097 fieldDescriptor fd; |
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1098 bool found = k != NULL && |
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1099 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_version_name(), |
|
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1100 vmSymbols::string_signature(), &fd); |
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1101 if (found) { |
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1102 oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
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1103 if (name_oop == NULL) |
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1104 return NULL; |
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1105 const char* name = java_lang_String::as_utf8_string(name_oop, |
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1106 java_runtime_version, |
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1107 sizeof(java_runtime_version)); |
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1108 return name; |
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1109 } else { |
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1110 return NULL; |
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1111 } |
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1112 } |
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1113 |
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1114 // General purpose hook into Java code, run once when the VM is initialized. |
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1115 // The Java library method itself may be changed independently from the VM. |
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1116 static void call_postVMInitHook(TRAPS) { |
|
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1117 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_PostVMInitHook(), THREAD); |
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1118 instanceKlassHandle klass (THREAD, k); |
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1119 if (klass.not_null()) { |
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1120 JavaValue result(T_VOID); |
|
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1121 JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
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1122 vmSymbols::void_method_signature(), |
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1123 CHECK); |
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1124 } |
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1125 } |
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1126 |
| 0 | 1127 static void reset_vm_info_property(TRAPS) { |
| 1128 // the vm info string | |
| 1129 ResourceMark rm(THREAD); | |
| 1130 const char *vm_info = VM_Version::vm_info_string(); | |
| 1131 | |
| 1132 // java.lang.System class | |
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1133 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
| 0 | 1134 instanceKlassHandle klass (THREAD, k); |
| 1135 | |
| 1136 // setProperty arguments | |
| 1137 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); | |
| 1138 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); | |
| 1139 | |
| 1140 // return value | |
| 1141 JavaValue r(T_OBJECT); | |
| 1142 | |
| 1143 // public static String setProperty(String key, String value); | |
| 1144 JavaCalls::call_static(&r, | |
| 1145 klass, | |
|
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1146 vmSymbols::setProperty_name(), |
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1147 vmSymbols::string_string_string_signature(), |
| 0 | 1148 key_str, |
| 1149 value_str, | |
| 1150 CHECK); | |
| 1151 } | |
| 1152 | |
| 1153 | |
| 1154 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { | |
| 1155 assert(thread_group.not_null(), "thread group should be specified"); | |
| 1156 assert(threadObj() == NULL, "should only create Java thread object once"); | |
| 1157 | |
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1158 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
| 0 | 1159 instanceKlassHandle klass (THREAD, k); |
| 1160 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
| 1161 | |
| 1162 java_lang_Thread::set_thread(thread_oop(), this); | |
| 1163 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
| 1164 set_threadObj(thread_oop()); | |
| 1165 | |
| 1166 JavaValue result(T_VOID); | |
| 1167 if (thread_name != NULL) { | |
| 1168 Handle name = java_lang_String::create_from_str(thread_name, CHECK); | |
| 1169 // Thread gets assigned specified name and null target | |
| 1170 JavaCalls::call_special(&result, | |
| 1171 thread_oop, | |
| 1172 klass, | |
|
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1173 vmSymbols::object_initializer_name(), |
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1174 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 1175 thread_group, // Argument 1 |
| 1176 name, // Argument 2 | |
| 1177 THREAD); | |
| 1178 } else { | |
| 1179 // Thread gets assigned name "Thread-nnn" and null target | |
| 1180 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) | |
| 1181 JavaCalls::call_special(&result, | |
| 1182 thread_oop, | |
| 1183 klass, | |
|
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1184 vmSymbols::object_initializer_name(), |
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1185 vmSymbols::threadgroup_runnable_void_signature(), |
| 0 | 1186 thread_group, // Argument 1 |
| 1187 Handle(), // Argument 2 | |
| 1188 THREAD); | |
| 1189 } | |
| 1190 | |
| 1191 | |
| 1192 if (daemon) { | |
| 1193 java_lang_Thread::set_daemon(thread_oop()); | |
| 1194 } | |
| 1195 | |
| 1196 if (HAS_PENDING_EXCEPTION) { | |
| 1197 return; | |
| 1198 } | |
| 1199 | |
| 1142 | 1200 KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
| 0 | 1201 Handle threadObj(this, this->threadObj()); |
| 1202 | |
| 1203 JavaCalls::call_special(&result, | |
| 1204 thread_group, | |
| 1205 group, | |
|
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1206 vmSymbols::add_method_name(), |
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1207 vmSymbols::thread_void_signature(), |
| 0 | 1208 threadObj, // Arg 1 |
| 1209 THREAD); | |
| 1210 | |
| 1211 | |
| 1212 } | |
| 1213 | |
| 1214 // NamedThread -- non-JavaThread subclasses with multiple | |
| 1215 // uniquely named instances should derive from this. | |
| 1216 NamedThread::NamedThread() : Thread() { | |
| 1217 _name = NULL; | |
|
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|
1218 _processed_thread = NULL; |
| 0 | 1219 } |
| 1220 | |
| 1221 NamedThread::~NamedThread() { | |
| 1222 if (_name != NULL) { | |
| 6197 | 1223 FREE_C_HEAP_ARRAY(char, _name, mtThread); |
| 0 | 1224 _name = NULL; |
| 1225 } | |
| 1226 } | |
| 1227 | |
| 1228 void NamedThread::set_name(const char* format, ...) { | |
| 1229 guarantee(_name == NULL, "Only get to set name once."); | |
| 6197 | 1230 _name = NEW_C_HEAP_ARRAY(char, max_name_len, mtThread); |
| 0 | 1231 guarantee(_name != NULL, "alloc failure"); |
| 1232 va_list ap; | |
| 1233 va_start(ap, format); | |
| 1234 jio_vsnprintf(_name, max_name_len, format, ap); | |
| 1235 va_end(ap); | |
| 1236 } | |
| 1237 | |
| 1238 // ======= WatcherThread ======== | |
| 1239 | |
| 1240 // The watcher thread exists to simulate timer interrupts. It should | |
| 1241 // be replaced by an abstraction over whatever native support for | |
| 1242 // timer interrupts exists on the platform. | |
| 1243 | |
| 1244 WatcherThread* WatcherThread::_watcher_thread = NULL; | |
|
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1245 bool WatcherThread::_startable = false; |
|
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1246 volatile bool WatcherThread::_should_terminate = false; |
| 0 | 1247 |
| 11151 | 1248 WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) { |
| 0 | 1249 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); |
| 1250 if (os::create_thread(this, os::watcher_thread)) { | |
| 1251 _watcher_thread = this; | |
| 1252 | |
| 1253 // Set the watcher thread to the highest OS priority which should not be | |
| 1254 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY | |
| 1255 // is created. The only normal thread using this priority is the reference | |
| 1256 // handler thread, which runs for very short intervals only. | |
| 1257 // If the VMThread's priority is not lower than the WatcherThread profiling | |
| 1258 // will be inaccurate. | |
| 1259 os::set_priority(this, MaxPriority); | |
| 1260 if (!DisableStartThread) { | |
| 1261 os::start_thread(this); | |
| 1262 } | |
| 1263 } | |
| 1264 } | |
| 1265 | |
|
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1266 int WatcherThread::sleep() const { |
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1267 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1268 |
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1269 // remaining will be zero if there are no tasks, |
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1270 // causing the WatcherThread to sleep until a task is |
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1271 // enrolled |
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1272 int remaining = PeriodicTask::time_to_wait(); |
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1273 int time_slept = 0; |
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1274 |
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1275 // we expect this to timeout - we only ever get unparked when |
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1276 // we should terminate or when a new task has been enrolled |
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1277 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
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1278 |
|
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1279 jlong time_before_loop = os::javaTimeNanos(); |
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1280 |
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1281 for (;;) { |
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1282 bool timedout = PeriodicTask_lock->wait(Mutex::_no_safepoint_check_flag, remaining); |
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1283 jlong now = os::javaTimeNanos(); |
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1284 |
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1285 if (remaining == 0) { |
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1286 // if we didn't have any tasks we could have waited for a long time |
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1287 // consider the time_slept zero and reset time_before_loop |
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1288 time_slept = 0; |
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1289 time_before_loop = now; |
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1290 } else { |
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1291 // need to recalulate since we might have new tasks in _tasks |
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1292 time_slept = (int) ((now - time_before_loop) / 1000000); |
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1293 } |
|
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1294 |
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1295 // Change to task list or spurious wakeup of some kind |
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1296 if (timedout || _should_terminate) { |
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|
1297 break; |
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|
1298 } |
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1299 |
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1300 remaining = PeriodicTask::time_to_wait(); |
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1301 if (remaining == 0) { |
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1302 // Last task was just disenrolled so loop around and wait until |
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1303 // another task gets enrolled |
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1304 continue; |
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1305 } |
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1306 |
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1307 remaining -= time_slept; |
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1308 if (remaining <= 0) |
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1309 break; |
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|
1310 } |
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1311 |
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1312 return time_slept; |
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1313 } |
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1314 |
| 0 | 1315 void WatcherThread::run() { |
| 1316 assert(this == watcher_thread(), "just checking"); | |
| 1317 | |
| 1318 this->record_stack_base_and_size(); | |
| 1319 this->initialize_thread_local_storage(); | |
| 1320 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 1321 while(!_should_terminate) { | |
| 1322 assert(watcher_thread() == Thread::current(), "thread consistency check"); | |
| 1323 assert(watcher_thread() == this, "thread consistency check"); | |
| 1324 | |
| 1325 // Calculate how long it'll be until the next PeriodicTask work | |
| 1326 // should be done, and sleep that amount of time. | |
|
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1327 int time_waited = sleep(); |
| 0 | 1328 |
| 1329 if (is_error_reported()) { | |
| 1330 // A fatal error has happened, the error handler(VMError::report_and_die) | |
| 1331 // should abort JVM after creating an error log file. However in some | |
| 1332 // rare cases, the error handler itself might deadlock. Here we try to | |
| 1333 // kill JVM if the fatal error handler fails to abort in 2 minutes. | |
| 1334 // | |
| 1335 // This code is in WatcherThread because WatcherThread wakes up | |
| 1336 // periodically so the fatal error handler doesn't need to do anything; | |
| 1337 // also because the WatcherThread is less likely to crash than other | |
| 1338 // threads. | |
| 1339 | |
| 1340 for (;;) { | |
| 1341 if (!ShowMessageBoxOnError | |
| 1342 && (OnError == NULL || OnError[0] == '\0') | |
| 1343 && Arguments::abort_hook() == NULL) { | |
| 1344 os::sleep(this, 2 * 60 * 1000, false); | |
| 1345 fdStream err(defaultStream::output_fd()); | |
| 1346 err.print_raw_cr("# [ timer expired, abort... ]"); | |
| 1347 // skip atexit/vm_exit/vm_abort hooks | |
| 1348 os::die(); | |
| 1349 } | |
| 1350 | |
| 1351 // Wake up 5 seconds later, the fatal handler may reset OnError or | |
| 1352 // ShowMessageBoxOnError when it is ready to abort. | |
| 1353 os::sleep(this, 5 * 1000, false); | |
| 1354 } | |
| 1355 } | |
| 1356 | |
|
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1357 PeriodicTask::real_time_tick(time_waited); |
| 0 | 1358 } |
| 1359 | |
| 1360 // Signal that it is terminated | |
| 1361 { | |
| 1362 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); | |
| 1363 _watcher_thread = NULL; | |
| 1364 Terminator_lock->notify(); | |
| 1365 } | |
| 1366 | |
| 1367 // Thread destructor usually does this.. | |
| 1368 ThreadLocalStorage::set_thread(NULL); | |
| 1369 } | |
| 1370 | |
| 1371 void WatcherThread::start() { | |
|
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1372 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1373 |
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1374 if (watcher_thread() == NULL && _startable) { |
| 0 | 1375 _should_terminate = false; |
| 1376 // Create the single instance of WatcherThread | |
| 1377 new WatcherThread(); | |
| 1378 } | |
| 1379 } | |
| 1380 | |
|
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1381 void WatcherThread::make_startable() { |
|
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1382 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1383 _startable = true; |
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1384 } |
|
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1385 |
| 0 | 1386 void WatcherThread::stop() { |
|
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1387 { |
|
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1388 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1389 _should_terminate = true; |
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1390 OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
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1391 |
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1392 WatcherThread* watcher = watcher_thread(); |
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1393 if (watcher != NULL) |
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1394 watcher->unpark(); |
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1395 } |
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1396 |
| 0 | 1397 // it is ok to take late safepoints here, if needed |
| 1398 MutexLocker mu(Terminator_lock); | |
|
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1399 |
| 0 | 1400 while(watcher_thread() != NULL) { |
| 1401 // This wait should make safepoint checks, wait without a timeout, | |
| 1402 // and wait as a suspend-equivalent condition. | |
| 1403 // | |
| 1404 // Note: If the FlatProfiler is running, then this thread is waiting | |
| 1405 // for the WatcherThread to terminate and the WatcherThread, via the | |
| 1406 // FlatProfiler task, is waiting for the external suspend request on | |
| 1407 // this thread to complete. wait_for_ext_suspend_completion() will | |
| 1408 // eventually timeout, but that takes time. Making this wait a | |
| 1409 // suspend-equivalent condition solves that timeout problem. | |
| 1410 // | |
| 1411 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
| 1412 Mutex::_as_suspend_equivalent_flag); | |
| 1413 } | |
| 1414 } | |
| 1415 | |
|
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1416 void WatcherThread::unpark() { |
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1417 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1418 PeriodicTask_lock->notify(); |
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1419 } |
|
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1420 |
| 0 | 1421 void WatcherThread::print_on(outputStream* st) const { |
| 1422 st->print("\"%s\" ", name()); | |
| 1423 Thread::print_on(st); | |
| 1424 st->cr(); | |
| 1425 } | |
| 1426 | |
| 1427 // ======= JavaThread ======== | |
| 1428 | |
|
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1429 #ifdef JVMCI |
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1430 |
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1431 jlong* JavaThread::_jvmci_old_thread_counters; |
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1432 |
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1433 bool jvmci_counters_include(JavaThread* thread) { |
|
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1434 oop threadObj = thread->threadObj(); |
|
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1435 return !JVMCICountersExcludeCompiler || !thread->is_Compiler_thread(); |
|
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1436 } |
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1437 |
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1438 void JavaThread::collect_counters(typeArrayOop array) { |
|
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1439 if (JVMCICounterSize > 0) { |
|
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1440 MutexLocker tl(Threads_lock); |
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1441 for (int i = 0; i < array->length(); i++) { |
|
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1442 array->long_at_put(i, _jvmci_old_thread_counters[i]); |
|
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1443 } |
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1444 for (JavaThread* tp = Threads::first(); tp != NULL; tp = tp->next()) { |
|
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1445 if (jvmci_counters_include(tp)) { |
|
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1446 for (int i = 0; i < array->length(); i++) { |
|
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1447 array->long_at_put(i, array->long_at(i) + tp->_jvmci_counters[i]); |
|
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1448 } |
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1449 } |
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1450 } |
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1451 } |
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1452 } |
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1453 |
|
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1454 #endif // JVMCI |
|
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1455 |
| 0 | 1456 // A JavaThread is a normal Java thread |
| 1457 | |
| 1458 void JavaThread::initialize() { | |
| 1459 // Initialize fields | |
|
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1460 |
|
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1461 // Set the claimed par_id to UINT_MAX (ie not claiming any par_ids) |
|
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1462 set_claimed_par_id(UINT_MAX); |
|
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1463 |
|
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1464 _buffer_blob = NULL; |
| 0 | 1465 set_saved_exception_pc(NULL); |
| 1466 set_threadObj(NULL); | |
| 1467 _anchor.clear(); | |
| 1468 set_entry_point(NULL); | |
| 1469 set_jni_functions(jni_functions()); | |
| 1470 set_callee_target(NULL); | |
| 1471 set_vm_result(NULL); | |
| 1472 set_vm_result_2(NULL); | |
| 1473 set_vframe_array_head(NULL); | |
| 1474 set_vframe_array_last(NULL); | |
| 1475 set_deferred_locals(NULL); | |
| 1476 set_deopt_mark(NULL); | |
|
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|
1477 set_deopt_nmethod(NULL); |
| 0 | 1478 clear_must_deopt_id(); |
| 1479 set_monitor_chunks(NULL); | |
| 1480 set_next(NULL); | |
| 1481 set_thread_state(_thread_new); | |
| 1482 _terminated = _not_terminated; | |
| 1483 _privileged_stack_top = NULL; | |
| 1484 _array_for_gc = NULL; | |
| 1485 _suspend_equivalent = false; | |
| 1486 _in_deopt_handler = 0; | |
| 1487 _doing_unsafe_access = false; | |
| 1488 _stack_guard_state = stack_guard_unused; | |
|
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1489 #ifdef JVMCI |
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1490 _jvmci_alternate_call_target = NULL; |
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1491 _jvmci_implicit_exception_pc = NULL; |
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1492 if (JVMCICounterSize > 0) { |
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1493 _jvmci_counters = NEW_C_HEAP_ARRAY(jlong, JVMCICounterSize, mtInternal); |
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1494 memset(_jvmci_counters, 0, sizeof(jlong) * JVMCICounterSize); |
|
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1495 } else { |
|
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1496 _jvmci_counters = NULL; |
|
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1497 } |
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|
1498 #endif // JVMCI |
|
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|
1499 (void)const_cast<oop&>(_exception_oop = NULL); |
| 0 | 1500 _exception_pc = 0; |
| 1501 _exception_handler_pc = 0; | |
| 1903 | 1502 _is_method_handle_return = 0; |
| 0 | 1503 _jvmti_thread_state= NULL; |
|
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1504 _should_post_on_exceptions_flag = JNI_FALSE; |
| 0 | 1505 _jvmti_get_loaded_classes_closure = NULL; |
| 1506 _interp_only_mode = 0; | |
| 1507 _special_runtime_exit_condition = _no_async_condition; | |
| 1508 _pending_async_exception = NULL; | |
| 1509 _thread_stat = NULL; | |
| 1510 _thread_stat = new ThreadStatistics(); | |
| 1511 _blocked_on_compilation = false; | |
| 1512 _jni_active_critical = 0; | |
| 1513 _do_not_unlock_if_synchronized = false; | |
| 1514 _cached_monitor_info = NULL; | |
| 1515 _parker = Parker::Allocate(this) ; | |
|
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|
1516 _scanned_nmethod = NULL; |
| 0 | 1517 |
| 1518 #ifndef PRODUCT | |
| 1519 _jmp_ring_index = 0; | |
| 1520 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { | |
| 1521 record_jump(NULL, NULL, NULL, 0); | |
| 1522 } | |
| 1523 #endif /* PRODUCT */ | |
| 1524 | |
| 1525 set_thread_profiler(NULL); | |
| 1526 if (FlatProfiler::is_active()) { | |
| 1527 // This is where we would decide to either give each thread it's own profiler | |
| 1528 // or use one global one from FlatProfiler, | |
| 1529 // or up to some count of the number of profiled threads, etc. | |
| 1530 ThreadProfiler* pp = new ThreadProfiler(); | |
| 1531 pp->engage(); | |
| 1532 set_thread_profiler(pp); | |
| 1533 } | |
| 1534 | |
| 1535 // Setup safepoint state info for this thread | |
| 1536 ThreadSafepointState::create(this); | |
| 1537 | |
| 1538 debug_only(_java_call_counter = 0); | |
| 1539 | |
| 1540 // JVMTI PopFrame support | |
| 1541 _popframe_condition = popframe_inactive; | |
| 1542 _popframe_preserved_args = NULL; | |
| 1543 _popframe_preserved_args_size = 0; | |
|
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|
1544 _frames_to_pop_failed_realloc = 0; |
| 0 | 1545 |
| 1546 pd_initialize(); | |
| 1547 } | |
| 1548 | |
|
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|
1549 #if INCLUDE_ALL_GCS |
|
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|
1550 SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
|
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1551 DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
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1552 #endif // INCLUDE_ALL_GCS |
|
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1553 |
| 4006 | 1554 JavaThread::JavaThread(bool is_attaching_via_jni) : |
|
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1555 Thread() |
|
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1556 #if INCLUDE_ALL_GCS |
|
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1557 , _satb_mark_queue(&_satb_mark_queue_set), |
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1558 _dirty_card_queue(&_dirty_card_queue_set) |
|
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1559 #endif // INCLUDE_ALL_GCS |
|
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|
1560 { |
| 0 | 1561 initialize(); |
| 4006 | 1562 if (is_attaching_via_jni) { |
| 1563 _jni_attach_state = _attaching_via_jni; | |
| 1564 } else { | |
| 1565 _jni_attach_state = _not_attaching_via_jni; | |
| 1566 } | |
|
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|
1567 assert(deferred_card_mark().is_empty(), "Default MemRegion ctor"); |
| 0 | 1568 } |
| 1569 | |
| 1570 bool JavaThread::reguard_stack(address cur_sp) { | |
| 1571 if (_stack_guard_state != stack_guard_yellow_disabled) { | |
| 1572 return true; // Stack already guarded or guard pages not needed. | |
| 1573 } | |
| 1574 | |
| 1575 if (register_stack_overflow()) { | |
| 1576 // For those architectures which have separate register and | |
| 1577 // memory stacks, we must check the register stack to see if | |
| 1578 // it has overflowed. | |
| 1579 return false; | |
| 1580 } | |
| 1581 | |
| 1582 // Java code never executes within the yellow zone: the latter is only | |
| 1583 // there to provoke an exception during stack banging. If java code | |
| 1584 // is executing there, either StackShadowPages should be larger, or | |
| 1585 // some exception code in c1, c2 or the interpreter isn't unwinding | |
| 1586 // when it should. | |
| 1587 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); | |
| 1588 | |
| 1589 enable_stack_yellow_zone(); | |
| 1590 return true; | |
| 1591 } | |
| 1592 | |
| 1593 bool JavaThread::reguard_stack(void) { | |
| 1594 return reguard_stack(os::current_stack_pointer()); | |
| 1595 } | |
| 1596 | |
| 1597 | |
| 1598 void JavaThread::block_if_vm_exited() { | |
| 1599 if (_terminated == _vm_exited) { | |
| 1600 // _vm_exited is set at safepoint, and Threads_lock is never released | |
| 1601 // we will block here forever | |
| 1602 Threads_lock->lock_without_safepoint_check(); | |
| 1603 ShouldNotReachHere(); | |
| 1604 } | |
| 1605 } | |
| 1606 | |
| 1607 | |
| 1608 // Remove this ifdef when C1 is ported to the compiler interface. | |
| 1609 static void compiler_thread_entry(JavaThread* thread, TRAPS); | |
| 1610 | |
|
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1611 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
|
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1612 Thread() |
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1613 #if INCLUDE_ALL_GCS |
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1614 , _satb_mark_queue(&_satb_mark_queue_set), |
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1615 _dirty_card_queue(&_dirty_card_queue_set) |
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1616 #endif // INCLUDE_ALL_GCS |
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1617 { |
| 0 | 1618 if (TraceThreadEvents) { |
| 1619 tty->print_cr("creating thread %p", this); | |
| 1620 } | |
| 1621 initialize(); | |
| 4006 | 1622 _jni_attach_state = _not_attaching_via_jni; |
| 0 | 1623 set_entry_point(entry_point); |
| 1624 // Create the native thread itself. | |
| 1625 // %note runtime_23 | |
| 1626 os::ThreadType thr_type = os::java_thread; | |
| 1627 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : | |
| 1628 os::java_thread; | |
| 1629 os::create_thread(this, thr_type, stack_sz); | |
| 1630 // The _osthread may be NULL here because we ran out of memory (too many threads active). | |
| 1631 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller | |
| 1632 // may hold a lock and all locks must be unlocked before throwing the exception (throwing | |
| 1633 // the exception consists of creating the exception object & initializing it, initialization | |
| 1634 // will leave the VM via a JavaCall and then all locks must be unlocked). | |
| 1635 // | |
| 1636 // The thread is still suspended when we reach here. Thread must be explicit started | |
| 1637 // by creator! Furthermore, the thread must also explicitly be added to the Threads list | |
| 1638 // by calling Threads:add. The reason why this is not done here, is because the thread | |
| 1639 // object must be fully initialized (take a look at JVM_Start) | |
| 1640 } | |
| 1641 | |
| 1642 JavaThread::~JavaThread() { | |
| 1643 if (TraceThreadEvents) { | |
| 1644 tty->print_cr("terminate thread %p", this); | |
| 1645 } | |
| 1646 | |
| 1647 // JSR166 -- return the parker to the free list | |
| 1648 Parker::Release(_parker); | |
| 1649 _parker = NULL ; | |
| 1650 | |
| 1651 // Free any remaining previous UnrollBlock | |
| 1652 vframeArray* old_array = vframe_array_last(); | |
| 1653 | |
| 1654 if (old_array != NULL) { | |
| 1655 Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); | |
| 1656 old_array->set_unroll_block(NULL); | |
| 1657 delete old_info; | |
| 1658 delete old_array; | |
| 1659 } | |
| 1660 | |
| 1661 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); | |
| 1662 if (deferred != NULL) { | |
| 1663 // This can only happen if thread is destroyed before deoptimization occurs. | |
| 1664 assert(deferred->length() != 0, "empty array!"); | |
| 1665 do { | |
| 1666 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); | |
| 1667 deferred->remove_at(0); | |
| 1668 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
| 1669 delete dlv; | |
| 1670 } while (deferred->length() != 0); | |
| 1671 delete deferred; | |
| 1672 } | |
| 1673 | |
| 1674 // All Java related clean up happens in exit | |
| 1675 ThreadSafepointState::destroy(this); | |
| 1676 if (_thread_profiler != NULL) delete _thread_profiler; | |
| 1677 if (_thread_stat != NULL) delete _thread_stat; | |
|
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1678 |
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1679 #ifdef JVMCI |
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1680 if (JVMCICounterSize > 0) { |
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1681 if (jvmci_counters_include(this)) { |
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1682 for (int i = 0; i < JVMCICounterSize; i++) { |
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1683 _jvmci_old_thread_counters[i] += _jvmci_counters[i]; |
|
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1684 } |
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1685 } |
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1686 FREE_C_HEAP_ARRAY(jlong, _jvmci_counters, mtInternal); |
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1687 } |
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1688 #endif // JVMCI |
| 0 | 1689 } |
| 1690 | |
| 1691 | |
| 1692 // The first routine called by a new Java thread | |
| 1693 void JavaThread::run() { | |
| 1694 // initialize thread-local alloc buffer related fields | |
| 1695 this->initialize_tlab(); | |
| 1696 | |
| 1697 // used to test validitity of stack trace backs | |
| 1698 this->record_base_of_stack_pointer(); | |
| 1699 | |
| 1700 // Record real stack base and size. | |
| 1701 this->record_stack_base_and_size(); | |
| 1702 | |
| 1703 // Initialize thread local storage; set before calling MutexLocker | |
| 1704 this->initialize_thread_local_storage(); | |
| 1705 | |
| 1706 this->create_stack_guard_pages(); | |
| 1707 | |
|
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1708 this->cache_global_variables(); |
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1709 |
| 0 | 1710 // Thread is now sufficient initialized to be handled by the safepoint code as being |
| 1711 // in the VM. Change thread state from _thread_new to _thread_in_vm | |
| 1712 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); | |
| 1713 | |
| 1714 assert(JavaThread::current() == this, "sanity check"); | |
| 1715 assert(!Thread::current()->owns_locks(), "sanity check"); | |
| 1716 | |
| 1717 DTRACE_THREAD_PROBE(start, this); | |
| 1718 | |
| 1719 // This operation might block. We call that after all safepoint checks for a new thread has | |
| 1720 // been completed. | |
| 1721 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 1722 | |
| 1723 if (JvmtiExport::should_post_thread_life()) { | |
| 1724 JvmtiExport::post_thread_start(this); | |
| 1725 } | |
| 1726 | |
| 10405 | 1727 EventThreadStart event; |
| 1728 if (event.should_commit()) { | |
| 1729 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
| 1730 event.commit(); | |
| 1731 } | |
|
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1732 |
| 0 | 1733 // We call another function to do the rest so we are sure that the stack addresses used |
| 1734 // from there will be lower than the stack base just computed | |
| 1735 thread_main_inner(); | |
| 1736 | |
| 1737 // Note, thread is no longer valid at this point! | |
| 1738 } | |
| 1739 | |
| 1740 | |
| 1741 void JavaThread::thread_main_inner() { | |
| 1742 assert(JavaThread::current() == this, "sanity check"); | |
| 1743 assert(this->threadObj() != NULL, "just checking"); | |
| 1744 | |
|
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1745 // Execute thread entry point unless this thread has a pending exception |
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1746 // or has been stopped before starting. |
| 0 | 1747 // Note: Due to JVM_StopThread we can have pending exceptions already! |
|
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1748 if (!this->has_pending_exception() && |
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1749 !java_lang_Thread::is_stillborn(this->threadObj())) { |
| 4006 | 1750 { |
| 1751 ResourceMark rm(this); | |
| 1752 this->set_native_thread_name(this->get_thread_name()); | |
| 1753 } | |
| 0 | 1754 HandleMark hm(this); |
| 1755 this->entry_point()(this, this); | |
| 1756 } | |
| 1757 | |
| 1758 DTRACE_THREAD_PROBE(stop, this); | |
| 1759 | |
| 1760 this->exit(false); | |
| 1761 delete this; | |
| 1762 } | |
| 1763 | |
| 1764 | |
| 1765 static void ensure_join(JavaThread* thread) { | |
| 1766 // We do not need to grap the Threads_lock, since we are operating on ourself. | |
| 1767 Handle threadObj(thread, thread->threadObj()); | |
| 1768 assert(threadObj.not_null(), "java thread object must exist"); | |
| 1769 ObjectLocker lock(threadObj, thread); | |
| 1770 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
| 1771 thread->clear_pending_exception(); | |
| 1772 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. | |
| 1773 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); | |
|
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1774 // Clear the native thread instance - this makes isAlive return false and allows the join() |
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1775 // to complete once we've done the notify_all below |
| 0 | 1776 java_lang_Thread::set_thread(threadObj(), NULL); |
| 1777 lock.notify_all(thread); | |
| 1778 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
| 1779 thread->clear_pending_exception(); | |
| 1780 } | |
| 1781 | |
|
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1782 |
| 0 | 1783 // For any new cleanup additions, please check to see if they need to be applied to |
| 1784 // cleanup_failed_attach_current_thread as well. | |
| 1785 void JavaThread::exit(bool destroy_vm, ExitType exit_type) { | |
| 1786 assert(this == JavaThread::current(), "thread consistency check"); | |
| 1787 | |
| 1788 HandleMark hm(this); | |
| 1789 Handle uncaught_exception(this, this->pending_exception()); | |
| 1790 this->clear_pending_exception(); | |
| 1791 Handle threadObj(this, this->threadObj()); | |
| 1792 assert(threadObj.not_null(), "Java thread object should be created"); | |
| 1793 | |
| 1794 if (get_thread_profiler() != NULL) { | |
| 1795 get_thread_profiler()->disengage(); | |
| 1796 ResourceMark rm; | |
| 1797 get_thread_profiler()->print(get_thread_name()); | |
| 1798 } | |
| 1799 | |
| 1800 | |
| 1801 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place | |
| 1802 { | |
| 1803 EXCEPTION_MARK; | |
| 1804 | |
| 1805 CLEAR_PENDING_EXCEPTION; | |
| 1806 } | |
| 1807 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This | |
| 1808 // has to be fixed by a runtime query method | |
| 1809 if (!destroy_vm || JDK_Version::is_jdk12x_version()) { | |
| 1810 // JSR-166: change call from from ThreadGroup.uncaughtException to | |
| 1811 // java.lang.Thread.dispatchUncaughtException | |
| 1812 if (uncaught_exception.not_null()) { | |
| 1813 Handle group(this, java_lang_Thread::threadGroup(threadObj())); | |
| 1814 { | |
| 1815 EXCEPTION_MARK; | |
| 1816 // Check if the method Thread.dispatchUncaughtException() exists. If so | |
| 1817 // call it. Otherwise we have an older library without the JSR-166 changes, | |
| 1818 // so call ThreadGroup.uncaughtException() | |
| 1819 KlassHandle recvrKlass(THREAD, threadObj->klass()); | |
| 1820 CallInfo callinfo; | |
| 1142 | 1821 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
| 0 | 1822 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
|
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1823 vmSymbols::dispatchUncaughtException_name(), |
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1824 vmSymbols::throwable_void_signature(), |
| 0 | 1825 KlassHandle(), false, false, THREAD); |
| 1826 CLEAR_PENDING_EXCEPTION; | |
| 1827 methodHandle method = callinfo.selected_method(); | |
| 1828 if (method.not_null()) { | |
| 1829 JavaValue result(T_VOID); | |
| 1830 JavaCalls::call_virtual(&result, | |
| 1831 threadObj, thread_klass, | |
|
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1832 vmSymbols::dispatchUncaughtException_name(), |
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1833 vmSymbols::throwable_void_signature(), |
| 0 | 1834 uncaught_exception, |
| 1835 THREAD); | |
| 1836 } else { | |
| 1142 | 1837 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
| 0 | 1838 JavaValue result(T_VOID); |
| 1839 JavaCalls::call_virtual(&result, | |
| 1840 group, thread_group, | |
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1841 vmSymbols::uncaughtException_name(), |
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1842 vmSymbols::thread_throwable_void_signature(), |
| 0 | 1843 threadObj, // Arg 1 |
| 1844 uncaught_exception, // Arg 2 | |
| 1845 THREAD); | |
| 1846 } | |
|
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1847 if (HAS_PENDING_EXCEPTION) { |
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1848 ResourceMark rm(this); |
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1849 jio_fprintf(defaultStream::error_stream(), |
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1850 "\nException: %s thrown from the UncaughtExceptionHandler" |
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1851 " in thread \"%s\"\n", |
| 6983 | 1852 pending_exception()->klass()->external_name(), |
|
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1853 get_thread_name()); |
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1854 CLEAR_PENDING_EXCEPTION; |
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1855 } |
| 0 | 1856 } |
| 1857 } | |
| 1858 | |
|
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1859 // Called before the java thread exit since we want to read info |
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1860 // from java_lang_Thread object |
| 10405 | 1861 EventThreadEnd event; |
| 1862 if (event.should_commit()) { | |
| 1863 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
| 1864 event.commit(); | |
| 1865 } | |
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1866 |
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1867 // Call after last event on thread |
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1868 EVENT_THREAD_EXIT(this); |
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1869 |
| 0 | 1870 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
| 1871 // the execution of the method. If that is not enough, then we don't really care. Thread.stop | |
| 1872 // is deprecated anyhow. | |
|
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1873 if (!is_Compiler_thread()) { |
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1874 int count = 3; |
| 0 | 1875 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { |
| 1876 EXCEPTION_MARK; | |
| 1877 JavaValue result(T_VOID); | |
| 1142 | 1878 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
| 0 | 1879 JavaCalls::call_virtual(&result, |
| 1880 threadObj, thread_klass, | |
|
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1881 vmSymbols::exit_method_name(), |
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1882 vmSymbols::void_method_signature(), |
| 0 | 1883 THREAD); |
| 1884 CLEAR_PENDING_EXCEPTION; | |
| 1885 } | |
| 1886 } | |
| 1887 // notify JVMTI | |
| 1888 if (JvmtiExport::should_post_thread_life()) { | |
| 1889 JvmtiExport::post_thread_end(this); | |
| 1890 } | |
| 1891 | |
| 1892 // We have notified the agents that we are exiting, before we go on, | |
| 1893 // we must check for a pending external suspend request and honor it | |
| 1894 // in order to not surprise the thread that made the suspend request. | |
| 1895 while (true) { | |
| 1896 { | |
| 1897 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1898 if (!is_external_suspend()) { | |
| 1899 set_terminated(_thread_exiting); | |
| 1900 ThreadService::current_thread_exiting(this); | |
| 1901 break; | |
| 1902 } | |
| 1903 // Implied else: | |
| 1904 // Things get a little tricky here. We have a pending external | |
| 1905 // suspend request, but we are holding the SR_lock so we | |
| 1906 // can't just self-suspend. So we temporarily drop the lock | |
| 1907 // and then self-suspend. | |
| 1908 } | |
| 1909 | |
| 1910 ThreadBlockInVM tbivm(this); | |
| 1911 java_suspend_self(); | |
| 1912 | |
| 1913 // We're done with this suspend request, but we have to loop around | |
| 1914 // and check again. Eventually we will get SR_lock without a pending | |
| 1915 // external suspend request and will be able to mark ourselves as | |
| 1916 // exiting. | |
| 1917 } | |
| 1918 // no more external suspends are allowed at this point | |
| 1919 } else { | |
| 1920 // before_exit() has already posted JVMTI THREAD_END events | |
| 1921 } | |
| 1922 | |
| 1923 // Notify waiters on thread object. This has to be done after exit() is called | |
| 1924 // on the thread (if the thread is the last thread in a daemon ThreadGroup the | |
| 1925 // group should have the destroyed bit set before waiters are notified). | |
| 1926 ensure_join(this); | |
| 1927 assert(!this->has_pending_exception(), "ensure_join should have cleared"); | |
| 1928 | |
| 1929 // 6282335 JNI DetachCurrentThread spec states that all Java monitors | |
| 1930 // held by this thread must be released. A detach operation must only | |
| 1931 // get here if there are no Java frames on the stack. Therefore, any | |
| 1932 // owned monitors at this point MUST be JNI-acquired monitors which are | |
| 1933 // pre-inflated and in the monitor cache. | |
| 1934 // | |
| 1935 // ensure_join() ignores IllegalThreadStateExceptions, and so does this. | |
| 1936 if (exit_type == jni_detach && JNIDetachReleasesMonitors) { | |
| 1937 assert(!this->has_last_Java_frame(), "detaching with Java frames?"); | |
| 1938 ObjectSynchronizer::release_monitors_owned_by_thread(this); | |
| 1939 assert(!this->has_pending_exception(), "release_monitors should have cleared"); | |
| 1940 } | |
| 1941 | |
| 1942 // These things needs to be done while we are still a Java Thread. Make sure that thread | |
| 1943 // is in a consistent state, in case GC happens | |
| 1944 assert(_privileged_stack_top == NULL, "must be NULL when we get here"); | |
| 1945 | |
| 1946 if (active_handles() != NULL) { | |
| 1947 JNIHandleBlock* block = active_handles(); | |
| 1948 set_active_handles(NULL); | |
| 1949 JNIHandleBlock::release_block(block); | |
| 1950 } | |
| 1951 | |
| 1952 if (free_handle_block() != NULL) { | |
| 1953 JNIHandleBlock* block = free_handle_block(); | |
| 1954 set_free_handle_block(NULL); | |
| 1955 JNIHandleBlock::release_block(block); | |
| 1956 } | |
| 1957 | |
| 1958 // These have to be removed while this is still a valid thread. | |
| 1959 remove_stack_guard_pages(); | |
| 1960 | |
| 1961 if (UseTLAB) { | |
| 1962 tlab().make_parsable(true); // retire TLAB | |
| 1963 } | |
| 1964 | |
|
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1965 if (JvmtiEnv::environments_might_exist()) { |
|
49
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1966 JvmtiExport::cleanup_thread(this); |
|
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1967 } |
|
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1968 |
|
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1969 // We must flush any deferred card marks before removing a thread from |
|
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1970 // the list of active threads. |
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1971 Universe::heap()->flush_deferred_store_barrier(this); |
|
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1972 assert(deferred_card_mark().is_empty(), "Should have been flushed"); |
|
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1973 |
|
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1974 #if INCLUDE_ALL_GCS |
|
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1975 // We must flush the G1-related buffers before removing a thread |
|
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1976 // from the list of active threads. We must do this after any deferred |
|
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1977 // card marks have been flushed (above) so that any entries that are |
|
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1978 // added to the thread's dirty card queue as a result are not lost. |
|
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1979 if (UseG1GC) { |
|
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1980 flush_barrier_queues(); |
|
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1981 } |
|
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1982 #endif // INCLUDE_ALL_GCS |
|
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1983 |
| 0 | 1984 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
| 1985 Threads::remove(this); | |
| 1986 } | |
| 1987 | |
|
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1988 #if INCLUDE_ALL_GCS |
|
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1989 // Flush G1-related queues. |
|
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1990 void JavaThread::flush_barrier_queues() { |
|
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1991 satb_mark_queue().flush(); |
|
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1992 dirty_card_queue().flush(); |
|
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1993 } |
|
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1994 |
|
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1995 void JavaThread::initialize_queues() { |
|
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1996 assert(!SafepointSynchronize::is_at_safepoint(), |
|
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1997 "we should not be at a safepoint"); |
|
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1998 |
|
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1999 ObjPtrQueue& satb_queue = satb_mark_queue(); |
|
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2000 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
|
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2001 // The SATB queue should have been constructed with its active |
|
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2002 // field set to false. |
|
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2003 assert(!satb_queue.is_active(), "SATB queue should not be active"); |
|
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|
2004 assert(satb_queue.is_empty(), "SATB queue should be empty"); |
|
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|
2005 // If we are creating the thread during a marking cycle, we should |
|
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2006 // set the active field of the SATB queue to true. |
|
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|
2007 if (satb_queue_set.is_active()) { |
|
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|
2008 satb_queue.set_active(true); |
|
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|
2009 } |
|
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|
2010 |
|
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2011 DirtyCardQueue& dirty_queue = dirty_card_queue(); |
|
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2012 // The dirty card queue should have been constructed with its |
|
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2013 // active field set to true. |
|
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|
2014 assert(dirty_queue.is_active(), "dirty card queue should be active"); |
|
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|
2015 } |
|
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2016 #endif // INCLUDE_ALL_GCS |
|
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2017 |
| 0 | 2018 void JavaThread::cleanup_failed_attach_current_thread() { |
|
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2019 if (get_thread_profiler() != NULL) { |
|
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2020 get_thread_profiler()->disengage(); |
|
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2021 ResourceMark rm; |
|
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2022 get_thread_profiler()->print(get_thread_name()); |
|
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2023 } |
|
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2024 |
|
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2025 if (active_handles() != NULL) { |
|
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2026 JNIHandleBlock* block = active_handles(); |
|
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2027 set_active_handles(NULL); |
|
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2028 JNIHandleBlock::release_block(block); |
|
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2029 } |
|
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2030 |
|
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2031 if (free_handle_block() != NULL) { |
|
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2032 JNIHandleBlock* block = free_handle_block(); |
|
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2033 set_free_handle_block(NULL); |
|
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2034 JNIHandleBlock::release_block(block); |
|
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2035 } |
|
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2036 |
|
1290
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2037 // These have to be removed while this is still a valid thread. |
|
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|
2038 remove_stack_guard_pages(); |
|
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2039 |
|
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2040 if (UseTLAB) { |
|
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2041 tlab().make_parsable(true); // retire TLAB, if any |
|
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|
2042 } |
|
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2043 |
|
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2044 #if INCLUDE_ALL_GCS |
|
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2045 if (UseG1GC) { |
|
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2046 flush_barrier_queues(); |
|
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2047 } |
|
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2048 #endif // INCLUDE_ALL_GCS |
|
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2049 |
|
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2050 Threads::remove(this); |
|
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2051 delete this; |
| 0 | 2052 } |
| 2053 | |
| 2054 | |
|
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2055 |
|
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|
2056 |
| 0 | 2057 JavaThread* JavaThread::active() { |
| 2058 Thread* thread = ThreadLocalStorage::thread(); | |
| 2059 assert(thread != NULL, "just checking"); | |
| 2060 if (thread->is_Java_thread()) { | |
| 2061 return (JavaThread*) thread; | |
| 2062 } else { | |
| 2063 assert(thread->is_VM_thread(), "this must be a vm thread"); | |
| 2064 VM_Operation* op = ((VMThread*) thread)->vm_operation(); | |
| 2065 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); | |
| 2066 assert(ret->is_Java_thread(), "must be a Java thread"); | |
| 2067 return ret; | |
| 2068 } | |
| 2069 } | |
| 2070 | |
| 2071 bool JavaThread::is_lock_owned(address adr) const { | |
|
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
2072 if (Thread::is_lock_owned(adr)) return true; |
| 0 | 2073 |
| 2074 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
| 2075 if (chunk->contains(adr)) return true; | |
| 2076 } | |
| 2077 | |
| 2078 return false; | |
| 2079 } | |
| 2080 | |
| 2081 | |
| 2082 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { | |
| 2083 chunk->set_next(monitor_chunks()); | |
| 2084 set_monitor_chunks(chunk); | |
| 2085 } | |
| 2086 | |
| 2087 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { | |
| 2088 guarantee(monitor_chunks() != NULL, "must be non empty"); | |
| 2089 if (monitor_chunks() == chunk) { | |
| 2090 set_monitor_chunks(chunk->next()); | |
| 2091 } else { | |
| 2092 MonitorChunk* prev = monitor_chunks(); | |
| 2093 while (prev->next() != chunk) prev = prev->next(); | |
| 2094 prev->set_next(chunk->next()); | |
| 2095 } | |
| 2096 } | |
| 2097 | |
| 2098 // JVM support. | |
| 2099 | |
| 2100 // Note: this function shouldn't block if it's called in | |
| 2101 // _thread_in_native_trans state (such as from | |
| 2102 // check_special_condition_for_native_trans()). | |
| 2103 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { | |
| 2104 | |
| 2105 if (has_last_Java_frame() && has_async_condition()) { | |
| 2106 // If we are at a polling page safepoint (not a poll return) | |
| 2107 // then we must defer async exception because live registers | |
| 2108 // will be clobbered by the exception path. Poll return is | |
| 2109 // ok because the call we a returning from already collides | |
| 2110 // with exception handling registers and so there is no issue. | |
| 2111 // (The exception handling path kills call result registers but | |
| 2112 // this is ok since the exception kills the result anyway). | |
| 2113 | |
| 2114 if (is_at_poll_safepoint()) { | |
| 2115 // if the code we are returning to has deoptimized we must defer | |
| 2116 // the exception otherwise live registers get clobbered on the | |
| 2117 // exception path before deoptimization is able to retrieve them. | |
| 2118 // | |
| 2119 RegisterMap map(this, false); | |
| 2120 frame caller_fr = last_frame().sender(&map); | |
| 2121 assert(caller_fr.is_compiled_frame(), "what?"); | |
| 2122 if (caller_fr.is_deoptimized_frame()) { | |
| 2123 if (TraceExceptions) { | |
| 2124 ResourceMark rm; | |
| 2125 tty->print_cr("deferred async exception at compiled safepoint"); | |
| 2126 } | |
| 2127 return; | |
| 2128 } | |
| 2129 } | |
| 2130 } | |
| 2131 | |
| 2132 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); | |
| 2133 if (condition == _no_async_condition) { | |
| 2134 // Conditions have changed since has_special_runtime_exit_condition() | |
| 2135 // was called: | |
| 2136 // - if we were here only because of an external suspend request, | |
| 2137 // then that was taken care of above (or cancelled) so we are done | |
| 2138 // - if we were here because of another async request, then it has | |
| 2139 // been cleared between the has_special_runtime_exit_condition() | |
| 2140 // and now so again we are done | |
| 2141 return; | |
| 2142 } | |
| 2143 | |
| 2144 // Check for pending async. exception | |
| 2145 if (_pending_async_exception != NULL) { | |
| 2146 // Only overwrite an already pending exception, if it is not a threadDeath. | |
| 1142 | 2147 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 2148 |
| 2149 // We cannot call Exceptions::_throw(...) here because we cannot block | |
| 2150 set_pending_exception(_pending_async_exception, __FILE__, __LINE__); | |
| 2151 | |
| 2152 if (TraceExceptions) { | |
| 2153 ResourceMark rm; | |
| 2154 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); | |
| 2155 if (has_last_Java_frame() ) { | |
| 2156 frame f = last_frame(); | |
| 2157 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); | |
| 2158 } | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2159 tty->print_cr(" of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
| 0 | 2160 } |
| 2161 _pending_async_exception = NULL; | |
| 2162 clear_has_async_exception(); | |
| 2163 } | |
| 2164 } | |
| 2165 | |
| 2166 if (check_unsafe_error && | |
| 2167 condition == _async_unsafe_access_error && !has_pending_exception()) { | |
| 2168 condition = _no_async_condition; // done | |
| 2169 switch (thread_state()) { | |
| 2170 case _thread_in_vm: | |
| 2171 { | |
| 2172 JavaThread* THREAD = this; | |
| 2173 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
| 2174 } | |
| 2175 case _thread_in_native: | |
| 2176 { | |
| 2177 ThreadInVMfromNative tiv(this); | |
| 2178 JavaThread* THREAD = this; | |
| 2179 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
| 2180 } | |
| 2181 case _thread_in_Java: | |
| 2182 { | |
| 2183 ThreadInVMfromJava tiv(this); | |
| 2184 JavaThread* THREAD = this; | |
| 2185 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); | |
| 2186 } | |
| 2187 default: | |
| 2188 ShouldNotReachHere(); | |
| 2189 } | |
| 2190 } | |
| 2191 | |
| 2192 assert(condition == _no_async_condition || has_pending_exception() || | |
| 2193 (!check_unsafe_error && condition == _async_unsafe_access_error), | |
| 2194 "must have handled the async condition, if no exception"); | |
| 2195 } | |
| 2196 | |
| 2197 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { | |
| 2198 // | |
| 2199 // Check for pending external suspend. Internal suspend requests do | |
| 2200 // not use handle_special_runtime_exit_condition(). | |
| 2201 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
| 2202 // thread is not the current thread. In older versions of jdbx, jdbx | |
| 2203 // threads could call into the VM with another thread's JNIEnv so we | |
| 2204 // can be here operating on behalf of a suspended thread (4432884). | |
| 2205 bool do_self_suspend = is_external_suspend_with_lock(); | |
| 2206 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { | |
| 2207 // | |
| 2208 // Because thread is external suspended the safepoint code will count | |
| 2209 // thread as at a safepoint. This can be odd because we can be here | |
| 2210 // as _thread_in_Java which would normally transition to _thread_blocked | |
| 2211 // at a safepoint. We would like to mark the thread as _thread_blocked | |
| 2212 // before calling java_suspend_self like all other callers of it but | |
| 2213 // we must then observe proper safepoint protocol. (We can't leave | |
| 2214 // _thread_blocked with a safepoint in progress). However we can be | |
| 2215 // here as _thread_in_native_trans so we can't use a normal transition | |
| 2216 // constructor/destructor pair because they assert on that type of | |
| 2217 // transition. We could do something like: | |
| 2218 // | |
| 2219 // JavaThreadState state = thread_state(); | |
| 2220 // set_thread_state(_thread_in_vm); | |
| 2221 // { | |
| 2222 // ThreadBlockInVM tbivm(this); | |
| 2223 // java_suspend_self() | |
| 2224 // } | |
| 2225 // set_thread_state(_thread_in_vm_trans); | |
| 2226 // if (safepoint) block; | |
| 2227 // set_thread_state(state); | |
| 2228 // | |
| 2229 // but that is pretty messy. Instead we just go with the way the | |
| 2230 // code has worked before and note that this is the only path to | |
| 2231 // java_suspend_self that doesn't put the thread in _thread_blocked | |
| 2232 // mode. | |
| 2233 | |
| 2234 frame_anchor()->make_walkable(this); | |
| 2235 java_suspend_self(); | |
| 2236 | |
| 2237 // We might be here for reasons in addition to the self-suspend request | |
| 2238 // so check for other async requests. | |
| 2239 } | |
| 2240 | |
| 2241 if (check_asyncs) { | |
| 2242 check_and_handle_async_exceptions(); | |
| 2243 } | |
| 2244 } | |
| 2245 | |
| 2246 void JavaThread::send_thread_stop(oop java_throwable) { | |
| 2247 assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); | |
| 2248 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); | |
| 2249 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
| 2250 | |
| 2251 // Do not throw asynchronous exceptions against the compiler thread | |
| 2252 // (the compiler thread should not be a Java thread -- fix in 1.4.2) | |
|
15463
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
2253 if (!can_call_java()) return; |
| 0 | 2254 |
| 2255 { | |
| 2256 // Actually throw the Throwable against the target Thread - however | |
| 2257 // only if there is no thread death exception installed already. | |
| 1142 | 2258 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 2259 // If the topmost frame is a runtime stub, then we are calling into |
| 2260 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) | |
| 2261 // must deoptimize the caller before continuing, as the compiled exception handler table | |
| 2262 // may not be valid | |
| 2263 if (has_last_Java_frame()) { | |
| 2264 frame f = last_frame(); | |
| 2265 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { | |
| 2266 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
| 2267 RegisterMap reg_map(this, UseBiasedLocking); | |
| 2268 frame compiled_frame = f.sender(®_map); | |
|
7428
2d6c433b1f38
8004741: Missing compiled exception handle table entry for multidimensional array allocation
kvn
parents:
7206
diff
changeset
|
2269 if (!StressCompiledExceptionHandlers && compiled_frame.can_be_deoptimized()) { |
| 0 | 2270 Deoptimization::deoptimize(this, compiled_frame, ®_map); |
| 2271 } | |
| 2272 } | |
| 2273 } | |
| 2274 | |
| 2275 // Set async. pending exception in thread. | |
| 2276 set_pending_async_exception(java_throwable); | |
| 2277 | |
| 2278 if (TraceExceptions) { | |
| 2279 ResourceMark rm; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2280 tty->print_cr("Pending Async. exception installed of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
| 0 | 2281 } |
| 2282 // for AbortVMOnException flag | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
2283 NOT_PRODUCT(Exceptions::debug_check_abort(InstanceKlass::cast(_pending_async_exception->klass())->external_name())); |
| 0 | 2284 } |
| 2285 } | |
| 2286 | |
| 2287 | |
| 2288 // Interrupt thread so it will wake up from a potential wait() | |
| 2289 Thread::interrupt(this); | |
| 2290 } | |
| 2291 | |
| 2292 // External suspension mechanism. | |
| 2293 // | |
| 2294 // Tell the VM to suspend a thread when ever it knows that it does not hold on | |
| 2295 // to any VM_locks and it is at a transition | |
| 2296 // Self-suspension will happen on the transition out of the vm. | |
| 2297 // Catch "this" coming in from JNIEnv pointers when the thread has been freed | |
| 2298 // | |
| 2299 // Guarantees on return: | |
| 2300 // + Target thread will not execute any new bytecode (that's why we need to | |
| 2301 // force a safepoint) | |
| 2302 // + Target thread will not enter any new monitors | |
| 2303 // | |
| 2304 void JavaThread::java_suspend() { | |
| 2305 { MutexLocker mu(Threads_lock); | |
| 2306 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { | |
| 2307 return; | |
| 2308 } | |
| 2309 } | |
| 2310 | |
| 2311 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 2312 if (!is_external_suspend()) { | |
| 2313 // a racing resume has cancelled us; bail out now | |
| 2314 return; | |
| 2315 } | |
| 2316 | |
| 2317 // suspend is done | |
| 2318 uint32_t debug_bits = 0; | |
| 2319 // Warning: is_ext_suspend_completed() may temporarily drop the | |
| 2320 // SR_lock to allow the thread to reach a stable thread state if | |
| 2321 // it is currently in a transient thread state. | |
| 2322 if (is_ext_suspend_completed(false /* !called_by_wait */, | |
| 2323 SuspendRetryDelay, &debug_bits) ) { | |
| 2324 return; | |
| 2325 } | |
| 2326 } | |
| 2327 | |
| 2328 VM_ForceSafepoint vm_suspend; | |
| 2329 VMThread::execute(&vm_suspend); | |
| 2330 } | |
| 2331 | |
| 2332 // Part II of external suspension. | |
| 2333 // A JavaThread self suspends when it detects a pending external suspend | |
| 2334 // request. This is usually on transitions. It is also done in places | |
| 2335 // where continuing to the next transition would surprise the caller, | |
| 2336 // e.g., monitor entry. | |
| 2337 // | |
| 2338 // Returns the number of times that the thread self-suspended. | |
| 2339 // | |
| 2340 // Note: DO NOT call java_suspend_self() when you just want to block current | |
| 2341 // thread. java_suspend_self() is the second stage of cooperative | |
| 2342 // suspension for external suspend requests and should only be used | |
| 2343 // to complete an external suspend request. | |
| 2344 // | |
| 2345 int JavaThread::java_suspend_self() { | |
| 2346 int ret = 0; | |
| 2347 | |
| 2348 // we are in the process of exiting so don't suspend | |
| 2349 if (is_exiting()) { | |
| 2350 clear_external_suspend(); | |
| 2351 return ret; | |
| 2352 } | |
| 2353 | |
| 2354 assert(_anchor.walkable() || | |
| 2355 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), | |
| 2356 "must have walkable stack"); | |
| 2357 | |
| 2358 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 2359 | |
| 979 | 2360 assert(!this->is_ext_suspended(), |
| 0 | 2361 "a thread trying to self-suspend should not already be suspended"); |
| 2362 | |
| 2363 if (this->is_suspend_equivalent()) { | |
| 2364 // If we are self-suspending as a result of the lifting of a | |
| 2365 // suspend equivalent condition, then the suspend_equivalent | |
| 2366 // flag is not cleared until we set the ext_suspended flag so | |
| 2367 // that wait_for_ext_suspend_completion() returns consistent | |
| 2368 // results. | |
| 2369 this->clear_suspend_equivalent(); | |
| 2370 } | |
| 2371 | |
| 2372 // A racing resume may have cancelled us before we grabbed SR_lock | |
| 2373 // above. Or another external suspend request could be waiting for us | |
| 2374 // by the time we return from SR_lock()->wait(). The thread | |
| 2375 // that requested the suspension may already be trying to walk our | |
| 2376 // stack and if we return now, we can change the stack out from under | |
| 2377 // it. This would be a "bad thing (TM)" and cause the stack walker | |
| 2378 // to crash. We stay self-suspended until there are no more pending | |
| 2379 // external suspend requests. | |
| 2380 while (is_external_suspend()) { | |
| 2381 ret++; | |
| 2382 this->set_ext_suspended(); | |
| 2383 | |
| 2384 // _ext_suspended flag is cleared by java_resume() | |
| 2385 while (is_ext_suspended()) { | |
| 2386 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); | |
| 2387 } | |
| 2388 } | |
| 2389 | |
| 2390 return ret; | |
| 2391 } | |
| 2392 | |
| 2393 #ifdef ASSERT | |
| 2394 // verify the JavaThread has not yet been published in the Threads::list, and | |
| 2395 // hence doesn't need protection from concurrent access at this stage | |
| 2396 void JavaThread::verify_not_published() { | |
| 2397 if (!Threads_lock->owned_by_self()) { | |
| 2398 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); | |
| 2399 assert( !Threads::includes(this), | |
| 2400 "java thread shouldn't have been published yet!"); | |
| 2401 } | |
| 2402 else { | |
| 2403 assert( !Threads::includes(this), | |
| 2404 "java thread shouldn't have been published yet!"); | |
| 2405 } | |
| 2406 } | |
| 2407 #endif | |
| 2408 | |
| 2409 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
| 2410 // progress or when _suspend_flags is non-zero. | |
| 2411 // Current thread needs to self-suspend if there is a suspend request and/or | |
| 2412 // block if a safepoint is in progress. | |
| 2413 // Async exception ISN'T checked. | |
| 2414 // Note only the ThreadInVMfromNative transition can call this function | |
| 2415 // directly and when thread state is _thread_in_native_trans | |
| 2416 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { | |
| 2417 assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); | |
| 2418 | |
| 2419 JavaThread *curJT = JavaThread::current(); | |
| 2420 bool do_self_suspend = thread->is_external_suspend(); | |
| 2421 | |
| 2422 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); | |
| 2423 | |
| 2424 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
| 2425 // thread is not the current thread. In older versions of jdbx, jdbx | |
| 2426 // threads could call into the VM with another thread's JNIEnv so we | |
| 2427 // can be here operating on behalf of a suspended thread (4432884). | |
| 2428 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { | |
| 2429 JavaThreadState state = thread->thread_state(); | |
| 2430 | |
| 2431 // We mark this thread_blocked state as a suspend-equivalent so | |
| 2432 // that a caller to is_ext_suspend_completed() won't be confused. | |
| 2433 // The suspend-equivalent state is cleared by java_suspend_self(). | |
| 2434 thread->set_suspend_equivalent(); | |
| 2435 | |
| 2436 // If the safepoint code sees the _thread_in_native_trans state, it will | |
| 2437 // wait until the thread changes to other thread state. There is no | |
| 2438 // guarantee on how soon we can obtain the SR_lock and complete the | |
| 2439 // self-suspend request. It would be a bad idea to let safepoint wait for | |
| 2440 // too long. Temporarily change the state to _thread_blocked to | |
| 2441 // let the VM thread know that this thread is ready for GC. The problem | |
| 2442 // of changing thread state is that safepoint could happen just after | |
| 2443 // java_suspend_self() returns after being resumed, and VM thread will | |
| 2444 // see the _thread_blocked state. We must check for safepoint | |
| 2445 // after restoring the state and make sure we won't leave while a safepoint | |
| 2446 // is in progress. | |
| 2447 thread->set_thread_state(_thread_blocked); | |
| 2448 thread->java_suspend_self(); | |
| 2449 thread->set_thread_state(state); | |
| 2450 // Make sure new state is seen by VM thread | |
| 2451 if (os::is_MP()) { | |
| 2452 if (UseMembar) { | |
| 2453 // Force a fence between the write above and read below | |
| 2454 OrderAccess::fence(); | |
| 2455 } else { | |
| 2456 // Must use this rather than serialization page in particular on Windows | |
| 2457 InterfaceSupport::serialize_memory(thread); | |
| 2458 } | |
| 2459 } | |
| 2460 } | |
| 2461 | |
| 2462 if (SafepointSynchronize::do_call_back()) { | |
| 2463 // If we are safepointing, then block the caller which may not be | |
| 2464 // the same as the target thread (see above). | |
| 2465 SafepointSynchronize::block(curJT); | |
| 2466 } | |
| 2467 | |
| 2468 if (thread->is_deopt_suspend()) { | |
| 2469 thread->clear_deopt_suspend(); | |
| 2470 RegisterMap map(thread, false); | |
| 2471 frame f = thread->last_frame(); | |
| 2472 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { | |
| 2473 f = f.sender(&map); | |
| 2474 } | |
| 2475 if (f.id() == thread->must_deopt_id()) { | |
| 2476 thread->clear_must_deopt_id(); | |
|
1727
da877bdc9000
6975006: assert(check.is_deoptimized_frame()) failed: missed deopt
never
parents:
1689
diff
changeset
|
2477 f.deoptimize(thread); |
| 0 | 2478 } else { |
| 2479 fatal("missed deoptimization!"); | |
| 2480 } | |
| 2481 } | |
| 2482 } | |
| 2483 | |
| 2484 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
| 2485 // progress or when _suspend_flags is non-zero. | |
| 2486 // Current thread needs to self-suspend if there is a suspend request and/or | |
| 2487 // block if a safepoint is in progress. | |
| 2488 // Also check for pending async exception (not including unsafe access error). | |
| 2489 // Note only the native==>VM/Java barriers can call this function and when | |
| 2490 // thread state is _thread_in_native_trans. | |
| 2491 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { | |
| 2492 check_safepoint_and_suspend_for_native_trans(thread); | |
| 2493 | |
| 2494 if (thread->has_async_exception()) { | |
| 2495 // We are in _thread_in_native_trans state, don't handle unsafe | |
| 2496 // access error since that may block. | |
| 2497 thread->check_and_handle_async_exceptions(false); | |
| 2498 } | |
| 2499 } | |
| 2500 | |
|
4873
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2501 // This is a variant of the normal |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2502 // check_special_condition_for_native_trans with slightly different |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2503 // semantics for use by critical native wrappers. It does all the |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2504 // normal checks but also performs the transition back into |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2505 // thread_in_Java state. This is required so that critical natives |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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diff
changeset
|
2506 // can potentially block and perform a GC if they are the last thread |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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diff
changeset
|
2507 // exiting the GC_locker. |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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diff
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|
2508 void JavaThread::check_special_condition_for_native_trans_and_transition(JavaThread *thread) { |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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parents:
4872
diff
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|
2509 check_special_condition_for_native_trans(thread); |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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diff
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|
2510 |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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parents:
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diff
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|
2511 // Finish the transition |
|
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7013347: allow crypto functions to be called inline to enhance performance
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parents:
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diff
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|
2512 thread->set_thread_state(_thread_in_Java); |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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diff
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|
2513 |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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diff
changeset
|
2514 if (thread->do_critical_native_unlock()) { |
|
0382d2b469b2
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4872
diff
changeset
|
2515 ThreadInVMfromJavaNoAsyncException tiv(thread); |
|
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diff
changeset
|
2516 GC_locker::unlock_critical(thread); |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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parents:
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diff
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|
2517 thread->clear_critical_native_unlock(); |
|
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diff
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|
2518 } |
|
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|
2519 } |
|
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|
2520 |
| 0 | 2521 // We need to guarantee the Threads_lock here, since resumes are not |
| 2522 // allowed during safepoint synchronization | |
| 2523 // Can only resume from an external suspension | |
| 2524 void JavaThread::java_resume() { | |
| 2525 assert_locked_or_safepoint(Threads_lock); | |
| 2526 | |
| 2527 // Sanity check: thread is gone, has started exiting or the thread | |
| 2528 // was not externally suspended. | |
| 2529 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { | |
| 2530 return; | |
| 2531 } | |
| 2532 | |
| 2533 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 2534 | |
| 2535 clear_external_suspend(); | |
| 2536 | |
| 2537 if (is_ext_suspended()) { | |
| 2538 clear_ext_suspended(); | |
| 2539 SR_lock()->notify_all(); | |
| 2540 } | |
| 2541 } | |
| 2542 | |
| 2543 void JavaThread::create_stack_guard_pages() { | |
| 2544 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; | |
| 2545 address low_addr = stack_base() - stack_size(); | |
| 2546 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
| 2547 | |
| 2548 int allocate = os::allocate_stack_guard_pages(); | |
| 2549 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); | |
| 2550 | |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2551 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
| 0 | 2552 warning("Attempt to allocate stack guard pages failed."); |
| 2553 return; | |
| 2554 } | |
| 2555 | |
| 2556 if (os::guard_memory((char *) low_addr, len)) { | |
| 2557 _stack_guard_state = stack_guard_enabled; | |
| 2558 } else { | |
| 2559 warning("Attempt to protect stack guard pages failed."); | |
| 2560 if (os::uncommit_memory((char *) low_addr, len)) { | |
| 2561 warning("Attempt to deallocate stack guard pages failed."); | |
| 2562 } | |
| 2563 } | |
| 2564 } | |
| 2565 | |
| 2566 void JavaThread::remove_stack_guard_pages() { | |
|
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
2567 assert(Thread::current() == this, "from different thread"); |
| 0 | 2568 if (_stack_guard_state == stack_guard_unused) return; |
| 2569 address low_addr = stack_base() - stack_size(); | |
| 2570 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
| 2571 | |
| 2572 if (os::allocate_stack_guard_pages()) { | |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2573 if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
| 0 | 2574 _stack_guard_state = stack_guard_unused; |
| 2575 } else { | |
| 2576 warning("Attempt to deallocate stack guard pages failed."); | |
| 2577 } | |
| 2578 } else { | |
| 2579 if (_stack_guard_state == stack_guard_unused) return; | |
| 2580 if (os::unguard_memory((char *) low_addr, len)) { | |
| 2581 _stack_guard_state = stack_guard_unused; | |
| 2582 } else { | |
| 2583 warning("Attempt to unprotect stack guard pages failed."); | |
| 2584 } | |
| 2585 } | |
| 2586 } | |
| 2587 | |
| 2588 void JavaThread::enable_stack_yellow_zone() { | |
| 2589 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2590 assert(_stack_guard_state != stack_guard_enabled, "already enabled"); | |
| 2591 | |
| 2592 // The base notation is from the stacks point of view, growing downward. | |
| 2593 // We need to adjust it to work correctly with guard_memory() | |
| 2594 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
| 2595 | |
| 2596 guarantee(base < stack_base(),"Error calculating stack yellow zone"); | |
| 2597 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); | |
| 2598 | |
| 2599 if (os::guard_memory((char *) base, stack_yellow_zone_size())) { | |
| 2600 _stack_guard_state = stack_guard_enabled; | |
| 2601 } else { | |
| 2602 warning("Attempt to guard stack yellow zone failed."); | |
| 2603 } | |
| 2604 enable_register_stack_guard(); | |
| 2605 } | |
| 2606 | |
| 2607 void JavaThread::disable_stack_yellow_zone() { | |
| 2608 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2609 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); | |
| 2610 | |
| 2611 // Simply return if called for a thread that does not use guard pages. | |
| 2612 if (_stack_guard_state == stack_guard_unused) return; | |
| 2613 | |
| 2614 // The base notation is from the stacks point of view, growing downward. | |
| 2615 // We need to adjust it to work correctly with guard_memory() | |
| 2616 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
| 2617 | |
| 2618 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { | |
| 2619 _stack_guard_state = stack_guard_yellow_disabled; | |
| 2620 } else { | |
| 2621 warning("Attempt to unguard stack yellow zone failed."); | |
| 2622 } | |
| 2623 disable_register_stack_guard(); | |
| 2624 } | |
| 2625 | |
| 2626 void JavaThread::enable_stack_red_zone() { | |
| 2627 // The base notation is from the stacks point of view, growing downward. | |
| 2628 // We need to adjust it to work correctly with guard_memory() | |
| 2629 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2630 address base = stack_red_zone_base() - stack_red_zone_size(); | |
| 2631 | |
| 2632 guarantee(base < stack_base(),"Error calculating stack red zone"); | |
| 2633 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); | |
| 2634 | |
| 2635 if(!os::guard_memory((char *) base, stack_red_zone_size())) { | |
| 2636 warning("Attempt to guard stack red zone failed."); | |
| 2637 } | |
| 2638 } | |
| 2639 | |
| 2640 void JavaThread::disable_stack_red_zone() { | |
| 2641 // The base notation is from the stacks point of view, growing downward. | |
| 2642 // We need to adjust it to work correctly with guard_memory() | |
| 2643 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2644 address base = stack_red_zone_base() - stack_red_zone_size(); | |
| 2645 if (!os::unguard_memory((char *)base, stack_red_zone_size())) { | |
| 2646 warning("Attempt to unguard stack red zone failed."); | |
| 2647 } | |
| 2648 } | |
| 2649 | |
| 2650 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { | |
| 2651 // ignore is there is no stack | |
| 2652 if (!has_last_Java_frame()) return; | |
| 2653 // traverse the stack frames. Starts from top frame. | |
| 2654 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
| 2655 frame* fr = fst.current(); | |
| 2656 f(fr, fst.register_map()); | |
| 2657 } | |
| 2658 } | |
| 2659 | |
| 2660 | |
| 2661 #ifndef PRODUCT | |
| 2662 // Deoptimization | |
| 2663 // Function for testing deoptimization | |
| 2664 void JavaThread::deoptimize() { | |
| 2665 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
| 2666 StackFrameStream fst(this, UseBiasedLocking); | |
| 2667 bool deopt = false; // Dump stack only if a deopt actually happens. | |
| 2668 bool only_at = strlen(DeoptimizeOnlyAt) > 0; | |
| 2669 // Iterate over all frames in the thread and deoptimize | |
| 2670 for(; !fst.is_done(); fst.next()) { | |
| 2671 if(fst.current()->can_be_deoptimized()) { | |
| 2672 | |
| 2673 if (only_at) { | |
| 2674 // Deoptimize only at particular bcis. DeoptimizeOnlyAt | |
| 2675 // consists of comma or carriage return separated numbers so | |
| 2676 // search for the current bci in that string. | |
| 2677 address pc = fst.current()->pc(); | |
| 2678 nmethod* nm = (nmethod*) fst.current()->cb(); | |
| 2679 ScopeDesc* sd = nm->scope_desc_at( pc); | |
| 2680 char buffer[8]; | |
| 2681 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); | |
| 2682 size_t len = strlen(buffer); | |
| 2683 const char * found = strstr(DeoptimizeOnlyAt, buffer); | |
| 2684 while (found != NULL) { | |
| 2685 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && | |
| 2686 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { | |
| 2687 // Check that the bci found is bracketed by terminators. | |
| 2688 break; | |
| 2689 } | |
| 2690 found = strstr(found + 1, buffer); | |
| 2691 } | |
| 2692 if (!found) { | |
| 2693 continue; | |
| 2694 } | |
| 2695 } | |
| 2696 | |
| 2697 if (DebugDeoptimization && !deopt) { | |
| 2698 deopt = true; // One-time only print before deopt | |
| 2699 tty->print_cr("[BEFORE Deoptimization]"); | |
| 2700 trace_frames(); | |
| 2701 trace_stack(); | |
| 2702 } | |
| 2703 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
| 2704 } | |
| 2705 } | |
| 2706 | |
| 2707 if (DebugDeoptimization && deopt) { | |
| 2708 tty->print_cr("[AFTER Deoptimization]"); | |
| 2709 trace_frames(); | |
| 2710 } | |
| 2711 } | |
| 2712 | |
| 2713 | |
| 2714 // Make zombies | |
| 2715 void JavaThread::make_zombies() { | |
| 2716 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
| 2717 if (fst.current()->can_be_deoptimized()) { | |
| 2718 // it is a Java nmethod | |
| 2719 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); | |
| 2720 nm->make_not_entrant(); | |
| 2721 } | |
| 2722 } | |
| 2723 } | |
| 2724 #endif // PRODUCT | |
| 2725 | |
| 2726 | |
| 2727 void JavaThread::deoptimized_wrt_marked_nmethods() { | |
| 2728 if (!has_last_Java_frame()) return; | |
| 2729 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
| 2730 StackFrameStream fst(this, UseBiasedLocking); | |
| 2731 for(; !fst.is_done(); fst.next()) { | |
| 2732 if (fst.current()->should_be_deoptimized()) { | |
| 2733 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); | |
| 2734 } | |
| 2735 } | |
| 2736 } | |
| 2737 | |
| 2738 | |
| 2739 // GC support | |
| 2740 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } | |
| 2741 | |
| 2742 void JavaThread::gc_epilogue() { | |
| 2743 frames_do(frame_gc_epilogue); | |
| 2744 } | |
| 2745 | |
| 2746 | |
| 2747 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } | |
| 2748 | |
| 2749 void JavaThread::gc_prologue() { | |
| 2750 frames_do(frame_gc_prologue); | |
| 2751 } | |
| 2752 | |
|
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2753 // If the caller is a NamedThread, then remember, in the current scope, |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2754 // the given JavaThread in its _processed_thread field. |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2755 class RememberProcessedThread: public StackObj { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2756 NamedThread* _cur_thr; |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2757 public: |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2758 RememberProcessedThread(JavaThread* jthr) { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2759 Thread* thread = Thread::current(); |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2760 if (thread->is_Named_thread()) { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2761 _cur_thr = (NamedThread *)thread; |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2762 _cur_thr->set_processed_thread(jthr); |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2763 } else { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2764 _cur_thr = NULL; |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2765 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2766 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2767 |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2768 ~RememberProcessedThread() { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2769 if (_cur_thr) { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2770 _cur_thr->set_processed_thread(NULL); |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2771 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2772 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2773 }; |
| 0 | 2774 |
|
20259
4af19b914f53
8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do
stefank
parents:
20197
diff
changeset
|
2775 void JavaThread::oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) { |
| 1166 | 2776 // Verify that the deferred card marks have been flushed. |
| 2777 assert(deferred_card_mark().is_empty(), "Should be empty during GC"); | |
|
1027
39b01ab7035a
6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents:
997
diff
changeset
|
2778 |
| 0 | 2779 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
| 2780 // since there may be more than one thread using each ThreadProfiler. | |
| 2781 | |
| 2782 // Traverse the GCHandles | |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
2783 Thread::oops_do(f, cld_f, cf); |
| 0 | 2784 |
| 2785 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
| 2786 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
| 2787 | |
| 2788 if (has_last_Java_frame()) { | |
|
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2789 // Record JavaThread to GC thread |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2790 RememberProcessedThread rpt(this); |
| 0 | 2791 |
| 2792 // Traverse the privileged stack | |
| 2793 if (_privileged_stack_top != NULL) { | |
| 2794 _privileged_stack_top->oops_do(f); | |
| 2795 } | |
| 2796 | |
| 2797 // traverse the registered growable array | |
| 2798 if (_array_for_gc != NULL) { | |
| 2799 for (int index = 0; index < _array_for_gc->length(); index++) { | |
| 2800 f->do_oop(_array_for_gc->adr_at(index)); | |
| 2801 } | |
| 2802 } | |
| 2803 | |
| 2804 // Traverse the monitor chunks | |
| 2805 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
| 2806 chunk->oops_do(f); | |
| 2807 } | |
| 2808 | |
| 2809 // Traverse the execution stack | |
| 2810 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
2811 fst.current()->oops_do(f, cld_f, cf, fst.register_map()); |
| 0 | 2812 } |
| 2813 } | |
| 2814 | |
| 2815 // callee_target is never live across a gc point so NULL it here should | |
| 2816 // it still contain a methdOop. | |
| 2817 | |
| 2818 set_callee_target(NULL); | |
| 2819 | |
| 2820 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); | |
| 2821 // If we have deferred set_locals there might be oops waiting to be | |
| 2822 // written | |
| 2823 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); | |
| 2824 if (list != NULL) { | |
| 2825 for (int i = 0; i < list->length(); i++) { | |
| 2826 list->at(i)->oops_do(f); | |
| 2827 } | |
| 2828 } | |
| 2829 | |
| 2830 // Traverse instance variables at the end since the GC may be moving things | |
| 2831 // around using this function | |
| 2832 f->do_oop((oop*) &_threadObj); | |
| 2833 f->do_oop((oop*) &_vm_result); | |
| 2834 f->do_oop((oop*) &_exception_oop); | |
| 2835 f->do_oop((oop*) &_pending_async_exception); | |
| 2836 | |
| 2837 if (jvmti_thread_state() != NULL) { | |
| 2838 jvmti_thread_state()->oops_do(f); | |
| 2839 } | |
|
3696
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2840 |
|
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2841 if (_scanned_nmethod != NULL && cf != NULL) { |
|
7212
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2842 // Safepoints can occur when the sweeper is scanning an nmethod so |
|
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2843 // process it here to make sure it isn't unloaded in the middle of |
|
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2844 // a scan. |
|
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2845 cf->do_code_blob(_scanned_nmethod); |
|
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2846 } |
| 0 | 2847 } |
| 2848 | |
|
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|
2849 void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
|
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|
2850 Thread::nmethods_do(cf); // (super method is a no-op) |
| 0 | 2851 |
| 2852 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
| 2853 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
| 2854 | |
| 2855 if (has_last_Java_frame()) { | |
| 2856 // Traverse the execution stack | |
| 2857 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
|
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|
2858 fst.current()->nmethods_do(cf); |
| 0 | 2859 } |
| 2860 } | |
| 2861 } | |
| 2862 | |
|
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2863 void JavaThread::metadata_do(void f(Metadata*)) { |
|
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|
2864 Thread::metadata_do(f); |
|
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|
2865 if (has_last_Java_frame()) { |
|
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|
2866 // Traverse the execution stack to call f() on the methods in the stack |
|
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|
2867 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
|
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|
2868 fst.current()->metadata_do(f); |
|
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|
2869 } |
|
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|
2870 } else if (is_Compiler_thread()) { |
|
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|
2871 // need to walk ciMetadata in current compile tasks to keep alive. |
|
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|
2872 CompilerThread* ct = (CompilerThread*)this; |
|
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|
2873 if (ct->env() != NULL) { |
|
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|
2874 ct->env()->metadata_do(f); |
|
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|
2875 } |
|
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|
2876 } |
|
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|
2877 } |
|
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|
2878 |
| 0 | 2879 // Printing |
| 2880 const char* _get_thread_state_name(JavaThreadState _thread_state) { | |
| 2881 switch (_thread_state) { | |
| 2882 case _thread_uninitialized: return "_thread_uninitialized"; | |
| 2883 case _thread_new: return "_thread_new"; | |
| 2884 case _thread_new_trans: return "_thread_new_trans"; | |
| 2885 case _thread_in_native: return "_thread_in_native"; | |
| 2886 case _thread_in_native_trans: return "_thread_in_native_trans"; | |
| 2887 case _thread_in_vm: return "_thread_in_vm"; | |
| 2888 case _thread_in_vm_trans: return "_thread_in_vm_trans"; | |
| 2889 case _thread_in_Java: return "_thread_in_Java"; | |
| 2890 case _thread_in_Java_trans: return "_thread_in_Java_trans"; | |
| 2891 case _thread_blocked: return "_thread_blocked"; | |
| 2892 case _thread_blocked_trans: return "_thread_blocked_trans"; | |
| 2893 default: return "unknown thread state"; | |
| 2894 } | |
| 2895 } | |
| 2896 | |
| 2897 #ifndef PRODUCT | |
| 2898 void JavaThread::print_thread_state_on(outputStream *st) const { | |
| 2899 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); | |
| 2900 }; | |
| 2901 void JavaThread::print_thread_state() const { | |
| 2902 print_thread_state_on(tty); | |
| 2903 }; | |
| 2904 #endif // PRODUCT | |
| 2905 | |
| 2906 // Called by Threads::print() for VM_PrintThreads operation | |
| 2907 void JavaThread::print_on(outputStream *st) const { | |
| 2908 st->print("\"%s\" ", get_thread_name()); | |
| 2909 oop thread_oop = threadObj(); | |
| 6766 | 2910 if (thread_oop != NULL) { |
| 2911 st->print("#" INT64_FORMAT " ", java_lang_Thread::thread_id(thread_oop)); | |
| 2912 if (java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); | |
| 2913 st->print("prio=%d ", java_lang_Thread::priority(thread_oop)); | |
| 2914 } | |
| 0 | 2915 Thread::print_on(st); |
| 2916 // print guess for valid stack memory region (assume 4K pages); helps lock debugging | |
|
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|
2917 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
| 0 | 2918 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
| 2919 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); | |
| 2920 } | |
| 2921 #ifndef PRODUCT | |
| 2922 print_thread_state_on(st); | |
| 2923 _safepoint_state->print_on(st); | |
| 2924 #endif // PRODUCT | |
| 2925 } | |
| 2926 | |
| 2927 // Called by fatal error handler. The difference between this and | |
| 2928 // JavaThread::print() is that we can't grab lock or allocate memory. | |
| 2929 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { | |
| 2930 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); | |
| 2931 oop thread_obj = threadObj(); | |
| 2932 if (thread_obj != NULL) { | |
| 2933 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); | |
| 2934 } | |
| 2935 st->print(" ["); | |
| 2936 st->print("%s", _get_thread_state_name(_thread_state)); | |
| 2937 if (osthread()) { | |
| 2938 st->print(", id=%d", osthread()->thread_id()); | |
| 2939 } | |
| 2940 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", | |
| 2941 _stack_base - _stack_size, _stack_base); | |
| 2942 st->print("]"); | |
| 2943 return; | |
| 2944 } | |
| 2945 | |
| 2946 // Verification | |
| 2947 | |
| 2948 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } | |
| 2949 | |
| 2950 void JavaThread::verify() { | |
| 2951 // Verify oops in the thread. | |
|
7179
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7177
diff
changeset
|
2952 oops_do(&VerifyOopClosure::verify_oop, NULL, NULL); |
| 0 | 2953 |
| 2954 // Verify the stack frames. | |
| 2955 frames_do(frame_verify); | |
| 2956 } | |
| 2957 | |
| 2958 // CR 6300358 (sub-CR 2137150) | |
| 2959 // Most callers of this method assume that it can't return NULL but a | |
| 2960 // thread may not have a name whilst it is in the process of attaching to | |
| 2961 // the VM - see CR 6412693, and there are places where a JavaThread can be | |
| 2962 // seen prior to having it's threadObj set (eg JNI attaching threads and | |
| 2963 // if vm exit occurs during initialization). These cases can all be accounted | |
| 2964 // for such that this method never returns NULL. | |
| 2965 const char* JavaThread::get_thread_name() const { | |
| 2966 #ifdef ASSERT | |
| 2967 // early safepoints can hit while current thread does not yet have TLS | |
| 2968 if (!SafepointSynchronize::is_at_safepoint()) { | |
| 2969 Thread *cur = Thread::current(); | |
| 2970 if (!(cur->is_Java_thread() && cur == this)) { | |
| 2971 // Current JavaThreads are allowed to get their own name without | |
| 2972 // the Threads_lock. | |
| 2973 assert_locked_or_safepoint(Threads_lock); | |
| 2974 } | |
| 2975 } | |
| 2976 #endif // ASSERT | |
| 2977 return get_thread_name_string(); | |
| 2978 } | |
| 2979 | |
| 2980 // Returns a non-NULL representation of this thread's name, or a suitable | |
| 2981 // descriptive string if there is no set name | |
| 2982 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { | |
| 2983 const char* name_str; | |
| 2984 oop thread_obj = threadObj(); | |
| 2985 if (thread_obj != NULL) { | |
| 2986 typeArrayOop name = java_lang_Thread::name(thread_obj); | |
| 2987 if (name != NULL) { | |
| 2988 if (buf == NULL) { | |
| 2989 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
| 2990 } | |
| 2991 else { | |
| 2992 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); | |
| 2993 } | |
| 2994 } | |
| 4006 | 2995 else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
| 0 | 2996 name_str = "<no-name - thread is attaching>"; |
| 2997 } | |
| 2998 else { | |
| 2999 name_str = Thread::name(); | |
| 3000 } | |
| 3001 } | |
| 3002 else { | |
| 3003 name_str = Thread::name(); | |
| 3004 } | |
| 3005 assert(name_str != NULL, "unexpected NULL thread name"); | |
| 3006 return name_str; | |
| 3007 } | |
| 3008 | |
| 3009 | |
| 3010 const char* JavaThread::get_threadgroup_name() const { | |
| 3011 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
| 3012 oop thread_obj = threadObj(); | |
| 3013 if (thread_obj != NULL) { | |
| 3014 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
| 3015 if (thread_group != NULL) { | |
| 3016 typeArrayOop name = java_lang_ThreadGroup::name(thread_group); | |
| 3017 // ThreadGroup.name can be null | |
| 3018 if (name != NULL) { | |
| 3019 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
| 3020 return str; | |
| 3021 } | |
| 3022 } | |
| 3023 } | |
| 3024 return NULL; | |
| 3025 } | |
| 3026 | |
| 3027 const char* JavaThread::get_parent_name() const { | |
| 3028 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
| 3029 oop thread_obj = threadObj(); | |
| 3030 if (thread_obj != NULL) { | |
| 3031 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
| 3032 if (thread_group != NULL) { | |
| 3033 oop parent = java_lang_ThreadGroup::parent(thread_group); | |
| 3034 if (parent != NULL) { | |
| 3035 typeArrayOop name = java_lang_ThreadGroup::name(parent); | |
| 3036 // ThreadGroup.name can be null | |
| 3037 if (name != NULL) { | |
| 3038 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
| 3039 return str; | |
| 3040 } | |
| 3041 } | |
| 3042 } | |
| 3043 } | |
| 3044 return NULL; | |
| 3045 } | |
| 3046 | |
| 3047 ThreadPriority JavaThread::java_priority() const { | |
| 3048 oop thr_oop = threadObj(); | |
| 3049 if (thr_oop == NULL) return NormPriority; // Bootstrapping | |
| 3050 ThreadPriority priority = java_lang_Thread::priority(thr_oop); | |
| 3051 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
| 3052 return priority; | |
| 3053 } | |
| 3054 | |
| 3055 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { | |
| 3056 | |
| 3057 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
| 3058 // Link Java Thread object <-> C++ Thread | |
| 3059 | |
| 3060 // Get the C++ thread object (an oop) from the JNI handle (a jthread) | |
| 3061 // and put it into a new Handle. The Handle "thread_oop" can then | |
| 3062 // be used to pass the C++ thread object to other methods. | |
| 3063 | |
| 3064 // Set the Java level thread object (jthread) field of the | |
| 3065 // new thread (a JavaThread *) to C++ thread object using the | |
| 3066 // "thread_oop" handle. | |
| 3067 | |
| 3068 // Set the thread field (a JavaThread *) of the | |
| 3069 // oop representing the java_lang_Thread to the new thread (a JavaThread *). | |
| 3070 | |
| 3071 Handle thread_oop(Thread::current(), | |
| 3072 JNIHandles::resolve_non_null(jni_thread)); | |
|
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diff
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|
3073 assert(InstanceKlass::cast(thread_oop->klass())->is_linked(), |
| 0 | 3074 "must be initialized"); |
| 3075 set_threadObj(thread_oop()); | |
| 3076 java_lang_Thread::set_thread(thread_oop(), this); | |
| 3077 | |
| 3078 if (prio == NoPriority) { | |
| 3079 prio = java_lang_Thread::priority(thread_oop()); | |
| 3080 assert(prio != NoPriority, "A valid priority should be present"); | |
| 3081 } | |
| 3082 | |
| 3083 // Push the Java priority down to the native thread; needs Threads_lock | |
| 3084 Thread::set_priority(this, prio); | |
| 3085 | |
| 20393 | 3086 prepare_ext(); |
| 3087 | |
| 0 | 3088 // Add the new thread to the Threads list and set it in motion. |
| 3089 // We must have threads lock in order to call Threads::add. | |
| 3090 // It is crucial that we do not block before the thread is | |
| 3091 // added to the Threads list for if a GC happens, then the java_thread oop | |
| 3092 // will not be visited by GC. | |
| 3093 Threads::add(this); | |
| 3094 } | |
| 3095 | |
| 3096 oop JavaThread::current_park_blocker() { | |
| 3097 // Support for JSR-166 locks | |
| 3098 oop thread_oop = threadObj(); | |
| 242 | 3099 if (thread_oop != NULL && |
| 3100 JDK_Version::current().supports_thread_park_blocker()) { | |
| 0 | 3101 return java_lang_Thread::park_blocker(thread_oop); |
| 3102 } | |
| 3103 return NULL; | |
| 3104 } | |
| 3105 | |
| 3106 | |
| 3107 void JavaThread::print_stack_on(outputStream* st) { | |
| 3108 if (!has_last_Java_frame()) return; | |
| 3109 ResourceMark rm; | |
| 3110 HandleMark hm; | |
| 3111 | |
| 3112 RegisterMap reg_map(this); | |
| 3113 vframe* start_vf = last_java_vframe(®_map); | |
| 3114 int count = 0; | |
| 3115 for (vframe* f = start_vf; f; f = f->sender() ) { | |
| 3116 if (f->is_java_frame()) { | |
| 3117 javaVFrame* jvf = javaVFrame::cast(f); | |
| 3118 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); | |
| 3119 | |
| 3120 // Print out lock information | |
| 3121 if (JavaMonitorsInStackTrace) { | |
| 3122 jvf->print_lock_info_on(st, count); | |
| 3123 } | |
| 3124 } else { | |
| 3125 // Ignore non-Java frames | |
| 3126 } | |
| 3127 | |
| 3128 // Bail-out case for too deep stacks | |
| 3129 count++; | |
| 3130 if (MaxJavaStackTraceDepth == count) return; | |
| 3131 } | |
| 3132 } | |
| 3133 | |
| 3134 | |
| 3135 // JVMTI PopFrame support | |
| 3136 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { | |
| 3137 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); | |
| 3138 if (in_bytes(size_in_bytes) != 0) { | |
| 6197 | 3139 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes), mtThread); |
| 0 | 3140 _popframe_preserved_args_size = in_bytes(size_in_bytes); |
|
1603
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1584
diff
changeset
|
3141 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
| 0 | 3142 } |
| 3143 } | |
| 3144 | |
| 3145 void* JavaThread::popframe_preserved_args() { | |
| 3146 return _popframe_preserved_args; | |
| 3147 } | |
| 3148 | |
| 3149 ByteSize JavaThread::popframe_preserved_args_size() { | |
| 3150 return in_ByteSize(_popframe_preserved_args_size); | |
| 3151 } | |
| 3152 | |
| 3153 WordSize JavaThread::popframe_preserved_args_size_in_words() { | |
| 3154 int sz = in_bytes(popframe_preserved_args_size()); | |
| 3155 assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); | |
| 3156 return in_WordSize(sz / wordSize); | |
| 3157 } | |
| 3158 | |
| 3159 void JavaThread::popframe_free_preserved_args() { | |
| 3160 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); | |
| 6197 | 3161 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args, mtThread); |
| 0 | 3162 _popframe_preserved_args = NULL; |
| 3163 _popframe_preserved_args_size = 0; | |
| 3164 } | |
| 3165 | |
| 3166 #ifndef PRODUCT | |
| 3167 | |
| 3168 void JavaThread::trace_frames() { | |
| 3169 tty->print_cr("[Describe stack]"); | |
| 3170 int frame_no = 1; | |
| 3171 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
| 3172 tty->print(" %d. ", frame_no++); | |
| 3173 fst.current()->print_value_on(tty,this); | |
| 3174 tty->cr(); | |
| 3175 } | |
| 3176 } | |
| 3177 | |
|
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diff
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|
3178 class PrintAndVerifyOopClosure: public OopClosure { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3179 protected: |
|
7588156f5cf9
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diff
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|
3180 template <class T> inline void do_oop_work(T* p) { |
|
7588156f5cf9
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diff
changeset
|
3181 oop obj = oopDesc::load_decode_heap_oop(p); |
|
7588156f5cf9
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|
3182 if (obj == NULL) return; |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3183 tty->print(INTPTR_FORMAT ": ", p); |
|
7588156f5cf9
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diff
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|
3184 if (obj->is_oop_or_null()) { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
changeset
|
3185 if (obj->is_objArray()) { |
|
7588156f5cf9
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diff
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|
3186 tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
|
7588156f5cf9
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diff
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|
3187 } else { |
|
7588156f5cf9
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3899
diff
changeset
|
3188 obj->print(); |
|
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diff
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|
3189 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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3899
diff
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|
3190 } else { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
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|
3191 tty->print_cr("invalid oop: " INTPTR_FORMAT, (oopDesc*) obj); |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3192 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
changeset
|
3193 tty->cr(); |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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3899
diff
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|
3194 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
changeset
|
3195 public: |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3196 virtual void do_oop(oop* p) { do_oop_work(p); } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3197 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3198 }; |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3199 |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3200 |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3201 static void oops_print(frame* f, const RegisterMap *map) { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3202 PrintAndVerifyOopClosure print; |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3203 f->print_value(); |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3204 f->oops_do(&print, NULL, NULL, (RegisterMap*)map); |
|
3908
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3205 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3206 |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3207 // Print our all the locations that contain oops and whether they are |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3208 // valid or not. This useful when trying to find the oldest frame |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3209 // where an oop has gone bad since the frame walk is from youngest to |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3210 // oldest. |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3211 void JavaThread::trace_oops() { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3212 tty->print_cr("[Trace oops]"); |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3213 frames_do(oops_print); |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3214 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3215 |
| 0 | 3216 |
|
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3217 #ifdef ASSERT |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3218 // Print or validate the layout of stack frames |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3219 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
|
3220 ResourceMark rm; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3221 PRESERVE_EXCEPTION_MARK; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3222 FrameValues values; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3223 int frame_no = 0; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3224 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
|
3225 fst.current()->describe(values, ++frame_no); |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3226 if (depth == frame_no) break; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3227 } |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3228 if (validate_only) { |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3229 values.validate(); |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3230 } else { |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3231 tty->print_cr("[Describe stack layout]"); |
|
4042
b20d64f83668
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
4007
diff
changeset
|
3232 values.print(this); |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3233 } |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3234 } |
|
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3235 #endif |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3236 |
| 0 | 3237 void JavaThread::trace_stack_from(vframe* start_vf) { |
| 3238 ResourceMark rm; | |
| 3239 int vframe_no = 1; | |
| 3240 for (vframe* f = start_vf; f; f = f->sender() ) { | |
| 3241 if (f->is_java_frame()) { | |
| 3242 javaVFrame::cast(f)->print_activation(vframe_no++); | |
| 3243 } else { | |
| 3244 f->print(); | |
| 3245 } | |
| 3246 if (vframe_no > StackPrintLimit) { | |
| 3247 tty->print_cr("...<more frames>..."); | |
| 3248 return; | |
| 3249 } | |
| 3250 } | |
| 3251 } | |
| 3252 | |
| 3253 | |
| 3254 void JavaThread::trace_stack() { | |
| 3255 if (!has_last_Java_frame()) return; | |
| 3256 ResourceMark rm; | |
| 3257 HandleMark hm; | |
| 3258 RegisterMap reg_map(this); | |
| 3259 trace_stack_from(last_java_vframe(®_map)); | |
| 3260 } | |
| 3261 | |
| 3262 | |
| 3263 #endif // PRODUCT | |
| 3264 | |
| 3265 | |
| 3266 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { | |
| 3267 assert(reg_map != NULL, "a map must be given"); | |
| 3268 frame f = last_frame(); | |
| 3269 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { | |
| 3270 if (vf->is_java_frame()) return javaVFrame::cast(vf); | |
| 3271 } | |
| 3272 return NULL; | |
| 3273 } | |
| 3274 | |
| 3275 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3276 Klass* JavaThread::security_get_caller_class(int depth) { |
| 0 | 3277 vframeStream vfst(this); |
| 3278 vfst.security_get_caller_frame(depth); | |
| 3279 if (!vfst.at_end()) { | |
| 3280 return vfst.method()->method_holder(); | |
| 3281 } | |
| 3282 return NULL; | |
| 3283 } | |
| 3284 | |
| 3285 static void compiler_thread_entry(JavaThread* thread, TRAPS) { | |
| 3286 assert(thread->is_Compiler_thread(), "must be compiler thread"); | |
| 3287 CompileBroker::compiler_thread_loop(); | |
| 3288 } | |
| 3289 | |
| 3290 // Create a CompilerThread | |
| 3291 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) | |
| 3292 : JavaThread(&compiler_thread_entry) { | |
| 3293 _env = NULL; | |
| 3294 _log = NULL; | |
| 3295 _task = NULL; | |
| 3296 _queue = queue; | |
| 3297 _counters = counters; | |
| 1584 | 3298 _buffer_blob = NULL; |
|
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3299 _scanned_nmethod = NULL; |
|
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3300 _compiler = NULL; |
| 0 | 3301 |
| 3302 #ifndef PRODUCT | |
| 3303 _ideal_graph_printer = NULL; | |
| 3304 #endif | |
| 3305 } | |
| 3306 | |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3307 #ifdef COMPILERJVMCI |
|
15463
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3308 bool CompilerThread::can_call_java() const { |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3309 return _compiler != NULL && _compiler->is_jvmci(); |
|
15463
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3310 } |
|
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3311 #endif |
|
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
3312 |
|
20259
4af19b914f53
8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do
stefank
parents:
20197
diff
changeset
|
3313 void CompilerThread::oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) { |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3314 JavaThread::oops_do(f, cld_f, cf); |
|
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3315 if (_scanned_nmethod != NULL && cf != NULL) { |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3316 // 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
|
3317 // 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
|
3318 // a scan. |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3319 cf->do_code_blob(_scanned_nmethod); |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3320 } |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3321 } |
| 0 | 3322 |
|
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3323 |
| 0 | 3324 // ======= Threads ======== |
| 3325 | |
| 3326 // The Threads class links together all active threads, and provides | |
| 3327 // operations over all threads. It is protected by its own Mutex | |
| 3328 // lock, which is also used in other contexts to protect thread | |
| 3329 // operations from having the thread being operated on from exiting | |
| 3330 // and going away unexpectedly (e.g., safepoint synchronization) | |
| 3331 | |
| 3332 JavaThread* Threads::_thread_list = NULL; | |
| 3333 int Threads::_number_of_threads = 0; | |
| 3334 int Threads::_number_of_non_daemon_threads = 0; | |
| 3335 int Threads::_return_code = 0; | |
| 3336 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
|
3337 #ifdef ASSERT |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3338 bool Threads::_vm_complete = false; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3339 #endif |
| 0 | 3340 |
| 3341 // All JavaThreads | |
| 3342 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) | |
| 3343 | |
| 3344 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system) | |
| 3345 void Threads::threads_do(ThreadClosure* tc) { | |
| 3346 assert_locked_or_safepoint(Threads_lock); | |
| 3347 // ALL_JAVA_THREADS iterates through all JavaThreads | |
| 3348 ALL_JAVA_THREADS(p) { | |
| 3349 tc->do_thread(p); | |
| 3350 } | |
| 3351 // Someday we could have a table or list of all non-JavaThreads. | |
| 3352 // For now, just manually iterate through them. | |
| 3353 tc->do_thread(VMThread::vm_thread()); | |
| 3354 Universe::heap()->gc_threads_do(tc); | |
|
323
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3355 WatcherThread *wt = WatcherThread::watcher_thread(); |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3356 // 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
|
3357 // 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
|
3358 // 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
|
3359 // 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
|
3360 // way to prevent termination of WatcherThread would be to acquire |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3361 // 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
|
3362 // checking in some cases. |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3363 if (wt != NULL) |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3364 tc->do_thread(wt); |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3365 |
| 0 | 3366 // If CompilerThreads ever become non-JavaThreads, add them here |
| 3367 } | |
| 3368 | |
| 3369 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { | |
| 3370 | |
| 242 | 3371 extern void JDK_Version_init(); |
| 3372 | |
| 0 | 3373 // Check version |
| 3374 if (!is_supported_jni_version(args->version)) return JNI_EVERSION; | |
| 3375 | |
| 3376 // Initialize the output stream module | |
| 3377 ostream_init(); | |
| 3378 | |
| 3379 // Process java launcher properties. | |
| 3380 Arguments::process_sun_java_launcher_properties(args); | |
| 3381 | |
| 3382 // Initialize the os module before using TLS | |
| 3383 os::init(); | |
| 3384 | |
| 3385 // Initialize system properties. | |
| 3386 Arguments::init_system_properties(); | |
| 3387 | |
| 242 | 3388 // So that JDK version can be used as a discrimintor when parsing arguments |
| 3389 JDK_Version_init(); | |
| 3390 | |
|
1864
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3391 // Update/Initialize System properties after JDK version number is known |
|
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3392 Arguments::init_version_specific_system_properties(); |
|
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3393 |
| 0 | 3394 // Parse arguments |
| 3395 jint parse_result = Arguments::parse(args); | |
| 3396 if (parse_result != JNI_OK) return parse_result; | |
| 3397 | |
|
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3398 os::init_before_ergo(); |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3399 |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3400 jint ergo_result = Arguments::apply_ergo(); |
|
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12173
diff
changeset
|
3401 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
|
3402 |
| 0 | 3403 if (PauseAtStartup) { |
| 3404 os::pause(); | |
| 3405 } | |
| 3406 | |
| 4006 | 3407 #ifndef USDT2 |
| 0 | 3408 HS_DTRACE_PROBE(hotspot, vm__init__begin); |
| 4006 | 3409 #else /* USDT2 */ |
| 3410 HOTSPOT_VM_INIT_BEGIN(); | |
| 3411 #endif /* USDT2 */ | |
| 0 | 3412 |
| 3413 // Record VM creation timing statistics | |
| 3414 TraceVmCreationTime create_vm_timer; | |
| 3415 create_vm_timer.start(); | |
| 3416 | |
| 3417 // Timing (must come after argument parsing) | |
| 3418 TraceTime timer("Create VM", TraceStartupTime); | |
| 3419 | |
| 3420 // Initialize the os module after parsing the args | |
| 3421 jint os_init_2_result = os::init_2(); | |
| 3422 if (os_init_2_result != JNI_OK) return os_init_2_result; | |
| 3423 | |
|
7177
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3424 jint adjust_after_os_result = Arguments::adjust_after_os(); |
|
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3425 if (adjust_after_os_result != JNI_OK) return adjust_after_os_result; |
|
53715fb1597d
7198334: UseNUMA modifies system parameters on non-NUMA system
brutisso
parents:
6985
diff
changeset
|
3426 |
| 6197 | 3427 // intialize TLS |
| 3428 ThreadLocalStorage::init(); | |
| 3429 | |
| 0 | 3430 // Initialize output stream logging |
| 3431 ostream_init_log(); | |
| 3432 | |
| 3433 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad | |
| 3434 // Must be before create_vm_init_agents() | |
| 3435 if (Arguments::init_libraries_at_startup()) { | |
| 3436 convert_vm_init_libraries_to_agents(); | |
| 3437 } | |
| 3438 | |
| 3439 // Launch -agentlib/-agentpath and converted -Xrun agents | |
| 3440 if (Arguments::init_agents_at_startup()) { | |
| 3441 create_vm_init_agents(); | |
| 3442 } | |
| 3443 | |
| 3444 // Initialize Threads state | |
| 3445 _thread_list = NULL; | |
| 3446 _number_of_threads = 0; | |
| 3447 _number_of_non_daemon_threads = 0; | |
| 3448 | |
| 3449 // Initialize global data structures and create system classes in heap | |
| 3450 vm_init_globals(); | |
| 3451 | |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3452 #ifdef JVMCI |
|
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3453 if (JVMCICounterSize > 0) { |
|
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3454 JavaThread::_jvmci_old_thread_counters = NEW_C_HEAP_ARRAY(jlong, JVMCICounterSize, mtInternal); |
|
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3455 memset(JavaThread::_jvmci_old_thread_counters, 0, sizeof(jlong) * JVMCICounterSize); |
|
13796
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3456 } else { |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3457 JavaThread::_jvmci_old_thread_counters = NULL; |
|
13796
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3458 } |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3459 #endif // JVMCI |
|
13796
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
3460 |
| 0 | 3461 // Attach the main thread to this os thread |
| 3462 JavaThread* main_thread = new JavaThread(); | |
| 3463 main_thread->set_thread_state(_thread_in_vm); | |
| 3464 // must do this before set_active_handles and initialize_thread_local_storage | |
| 3465 // Note: on solaris initialize_thread_local_storage() will (indirectly) | |
| 3466 // change the stack size recorded here to one based on the java thread | |
| 3467 // stacksize. This adjusted size is what is used to figure the placement | |
| 3468 // of the guard pages. | |
| 3469 main_thread->record_stack_base_and_size(); | |
| 3470 main_thread->initialize_thread_local_storage(); | |
| 3471 | |
| 3472 main_thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 3473 | |
| 3474 if (!main_thread->set_as_starting_thread()) { | |
| 3475 vm_shutdown_during_initialization( | |
| 3476 "Failed necessary internal allocation. Out of swap space"); | |
| 3477 delete main_thread; | |
| 3478 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
| 3479 return JNI_ENOMEM; | |
| 3480 } | |
| 3481 | |
| 3482 // Enable guard page *after* os::create_main_thread(), otherwise it would | |
| 3483 // crash Linux VM, see notes in os_linux.cpp. | |
| 3484 main_thread->create_stack_guard_pages(); | |
| 3485 | |
| 1878 | 3486 // Initialize Java-Level synchronization subsystem |
| 3487 ObjectMonitor::Initialize() ; | |
| 0 | 3488 |
| 3489 // Initialize global modules | |
| 3490 jint status = init_globals(); | |
| 3491 if (status != JNI_OK) { | |
| 3492 delete main_thread; | |
| 3493 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
| 3494 return status; | |
| 3495 } | |
| 3496 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3497 // Should be done after the heap is fully created |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3498 main_thread->cache_global_variables(); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3499 |
| 0 | 3500 HandleMark hm; |
| 3501 | |
| 3502 { MutexLocker mu(Threads_lock); | |
| 3503 Threads::add(main_thread); | |
| 3504 } | |
| 3505 | |
| 3506 // Any JVMTI raw monitors entered in onload will transition into | |
| 3507 // real raw monitor. VM is setup enough here for raw monitor enter. | |
| 3508 JvmtiExport::transition_pending_onload_raw_monitors(); | |
| 3509 | |
| 3510 // Create the VMThread | |
| 3511 { TraceTime timer("Start VMThread", TraceStartupTime); | |
| 3512 VMThread::create(); | |
| 3513 Thread* vmthread = VMThread::vm_thread(); | |
| 3514 | |
| 3515 if (!os::create_thread(vmthread, os::vm_thread)) | |
| 3516 vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); | |
| 3517 | |
| 3518 // Wait for the VM thread to become ready, and VMThread::run to initialize | |
| 3519 // Monitors can have spurious returns, must always check another state flag | |
| 3520 { | |
| 3521 MutexLocker ml(Notify_lock); | |
| 3522 os::start_thread(vmthread); | |
| 3523 while (vmthread->active_handles() == NULL) { | |
| 3524 Notify_lock->wait(); | |
| 3525 } | |
| 3526 } | |
| 3527 } | |
| 3528 | |
| 3529 assert (Universe::is_fully_initialized(), "not initialized"); | |
|
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3530 if (VerifyDuringStartup) { |
|
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9071
diff
changeset
|
3531 // 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
|
3532 VM_Verify verify_op; |
|
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3533 VMThread::execute(&verify_op); |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3534 } |
|
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3535 |
| 0 | 3536 EXCEPTION_MARK; |
| 3537 | |
| 3538 // At this point, the Universe is initialized, but we have not executed | |
| 3539 // any byte code. Now is a good time (the only time) to dump out the | |
| 3540 // internal state of the JVM for sharing. | |
| 3541 if (DumpSharedSpaces) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3542 MetaspaceShared::preload_and_dump(CHECK_0); |
| 0 | 3543 ShouldNotReachHere(); |
| 3544 } | |
| 3545 | |
| 3546 // Always call even when there are not JVMTI environments yet, since environments | |
| 3547 // may be attached late and JVMTI must track phases of VM execution | |
| 3548 JvmtiExport::enter_start_phase(); | |
| 3549 | |
| 3550 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. | |
| 3551 JvmtiExport::post_vm_start(); | |
| 3552 | |
| 3553 { | |
| 3554 TraceTime timer("Initialize java.lang classes", TraceStartupTime); | |
| 3555 | |
| 3556 if (EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
| 3557 create_vm_init_libraries(); | |
| 3558 } | |
| 3559 | |
| 7608 | 3560 initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
| 0 | 3561 |
| 3562 // Initialize java_lang.System (needed before creating the thread) | |
| 7608 | 3563 initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
| 3564 initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); | |
| 3565 Handle thread_group = create_initial_thread_group(CHECK_0); | |
| 3566 Universe::set_main_thread_group(thread_group()); | |
| 3567 initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); | |
| 3568 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); | |
| 3569 main_thread->set_threadObj(thread_object); | |
| 3570 // Set thread status to running since main thread has | |
| 3571 // been started and running. | |
| 3572 java_lang_Thread::set_thread_status(thread_object, | |
| 3573 java_lang_Thread::RUNNABLE); | |
| 3574 | |
| 3575 // The VM creates & returns objects of this class. Make sure it's initialized. | |
| 3576 initialize_class(vmSymbols::java_lang_Class(), CHECK_0); | |
| 3577 | |
| 3578 // The VM preresolves methods to these classes. Make sure that they get initialized | |
| 3579 initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); | |
| 3580 initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); | |
| 3581 call_initializeSystemClass(CHECK_0); | |
| 3582 | |
| 3583 // get the Java runtime name after java.lang.System is initialized | |
| 3584 JDK_Version::set_runtime_name(get_java_runtime_name(THREAD)); | |
| 3585 JDK_Version::set_runtime_version(get_java_runtime_version(THREAD)); | |
| 0 | 3586 |
| 3587 // an instance of OutOfMemory exception has been allocated earlier | |
| 7608 | 3588 initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
| 3589 initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); | |
| 3590 initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); | |
| 3591 initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); | |
| 3592 initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); | |
| 3593 initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); | |
| 3594 initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); | |
| 3595 initialize_class(vmSymbols::java_lang_IllegalArgumentException(), CHECK_0); | |
|
2416
38fea01eb669
6817525: turn on method handle functionality by default for JSR 292
twisti
parents:
2376
diff
changeset
|
3596 } |
| 0 | 3597 |
| 3598 // See : bugid 4211085. | |
| 3599 // Background : the static initializer of java.lang.Compiler tries to read | |
| 3600 // property"java.compiler" and read & write property "java.vm.info". | |
| 3601 // When a security manager is installed through the command line | |
| 3602 // option "-Djava.security.manager", the above properties are not | |
| 3603 // readable and the static initializer for java.lang.Compiler fails | |
| 3604 // resulting in a NoClassDefFoundError. This can happen in any | |
| 3605 // user code which calls methods in java.lang.Compiler. | |
| 3606 // Hack : the hack is to pre-load and initialize this class, so that only | |
| 3607 // system domains are on the stack when the properties are read. | |
| 3608 // Currently even the AWT code has calls to methods in java.lang.Compiler. | |
| 3609 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT. | |
| 3610 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and | |
| 3611 // read and write"java.vm.info" in the default policy file. See bugid 4211383 | |
| 3612 // 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
|
3613 initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
| 0 | 3614 |
| 3615 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to | |
| 3616 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot | |
| 3617 // compiler does not get loaded through java.lang.Compiler). "java -version" with the | |
| 3618 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here. | |
| 3619 // This should also be taken out as soon as 4211383 gets fixed. | |
| 3620 reset_vm_info_property(CHECK_0); | |
| 3621 | |
| 3622 quicken_jni_functions(); | |
| 3623 | |
|
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3624 // Must be run after init_ft which initializes ft_enabled |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3625 if (TRACE_INITIALIZE() != JNI_OK) { |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3626 vm_exit_during_initialization("Failed to initialize tracing backend"); |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3627 } |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3628 |
| 0 | 3629 // Set flag that basic initialization has completed. Used by exceptions and various |
| 3630 // debug stuff, that does not work until all basic classes have been initialized. | |
| 3631 set_init_completed(); | |
| 3632 | |
|
17979
e204777ac770
8042933: assert(capacity_until_gc >= committed_bytes) failed
ehelin
parents:
17937
diff
changeset
|
3633 Metaspace::post_initialize(); |
|
e204777ac770
8042933: assert(capacity_until_gc >= committed_bytes) failed
ehelin
parents:
17937
diff
changeset
|
3634 |
| 4006 | 3635 #ifndef USDT2 |
| 0 | 3636 HS_DTRACE_PROBE(hotspot, vm__init__end); |
| 4006 | 3637 #else /* USDT2 */ |
| 3638 HOTSPOT_VM_INIT_END(); | |
| 3639 #endif /* USDT2 */ | |
| 0 | 3640 |
| 3641 // record VM initialization completion time | |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3642 #if INCLUDE_MANAGEMENT |
| 0 | 3643 Management::record_vm_init_completed(); |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3644 #endif // INCLUDE_MANAGEMENT |
| 0 | 3645 |
| 3646 // Compute system loader. Note that this has to occur after set_init_completed, since | |
| 3647 // valid exceptions may be thrown in the process. | |
| 3648 // Note that we do not use CHECK_0 here since we are inside an EXCEPTION_MARK and | |
| 3649 // set_init_completed has just been called, causing exceptions not to be shortcut | |
| 3650 // anymore. We call vm_exit_during_initialization directly instead. | |
| 3651 SystemDictionary::compute_java_system_loader(THREAD); | |
| 3652 if (HAS_PENDING_EXCEPTION) { | |
| 3653 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
| 3654 } | |
| 3655 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3656 #if INCLUDE_ALL_GCS |
| 0 | 3657 // Support for ConcurrentMarkSweep. This should be cleaned up |
|
342
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3658 // 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
|
3659 // once things are properly refactored. XXX YSR |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3660 if (UseConcMarkSweepGC || UseG1GC) { |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3661 if (UseConcMarkSweepGC) { |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3662 ConcurrentMarkSweepThread::makeSurrogateLockerThread(THREAD); |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3663 } else { |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3664 ConcurrentMarkThread::makeSurrogateLockerThread(THREAD); |
|
37f87013dfd8
6711316: Open source the Garbage-First garbage collector
ysr
parents:
62
diff
changeset
|
3665 } |
| 0 | 3666 if (HAS_PENDING_EXCEPTION) { |
| 3667 vm_exit_during_initialization(Handle(THREAD, PENDING_EXCEPTION)); | |
| 3668 } | |
| 3669 } | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
3670 #endif // INCLUDE_ALL_GCS |
| 0 | 3671 |
| 3672 // Always call even when there are not JVMTI environments yet, since environments | |
| 3673 // may be attached late and JVMTI must track phases of VM execution | |
| 3674 JvmtiExport::enter_live_phase(); | |
| 3675 | |
| 3676 // Signal Dispatcher needs to be started before VMInit event is posted | |
| 3677 os::signal_init(); | |
| 3678 | |
| 3679 // Start Attach Listener if +StartAttachListener or it can't be started lazily | |
| 3680 if (!DisableAttachMechanism) { | |
|
11139
2e8f19c2feef
7162400: Intermittent java.io.IOException: Bad file number during HotSpotVirtualMachine.executeCommand
allwin
parents:
11136
diff
changeset
|
3681 AttachListener::vm_start(); |
| 0 | 3682 if (StartAttachListener || AttachListener::init_at_startup()) { |
| 3683 AttachListener::init(); | |
| 3684 } | |
| 3685 } | |
| 3686 | |
| 3687 // Launch -Xrun agents | |
| 3688 // Must be done in the JVMTI live phase so that for backward compatibility the JDWP | |
| 3689 // back-end can launch with -Xdebug -Xrunjdwp. | |
| 3690 if (!EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
| 3691 create_vm_init_libraries(); | |
| 3692 } | |
| 3693 | |
|
6002
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3694 // 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
|
3695 JvmtiExport::post_vm_initialized(); |
|
df4cd4aac5c1
7160924: jvmti: GetPhase returns incorrect phase before VMInit event is issued
rbackman
parents:
5928
diff
changeset
|
3696 |
| 10405 | 3697 if (TRACE_START() != JNI_OK) { |
| 3698 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
|
3699 } |
|
94ec88ca68e2
7115199: Add event tracing hooks and Java Flight Recorder infrastructure
phh
parents:
4095
diff
changeset
|
3700 |
|
3799
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3701 if (CleanChunkPoolAsync) { |
|
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3702 Chunk::start_chunk_pool_cleaner_task(); |
|
48048b59a551
7061204: clean the chunk table synchronously in embedded builds
jcoomes
parents:
3769
diff
changeset
|
3703 } |
| 0 | 3704 |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3705 #ifdef JVMCI |
|
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3706 status = JVMCIRuntime::check_arguments(main_thread); |
|
16270
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3707 if (status != JNI_OK) { |
|
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3708 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again |
|
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3709 return status; |
|
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3710 } |
|
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3711 #endif |
|
d56a09df1a1f
implemented eager checking of Graal options (GRAAL-807)
Doug Simon <doug.simon@oracle.com>
parents:
16242
diff
changeset
|
3712 |
| 0 | 3713 // initialize compiler(s) |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
3714 #if defined(COMPILER1) || defined(COMPILER2) || defined(SHARK) || defined(COMPILERJVMCI) |
| 0 | 3715 CompileBroker::compilation_init(); |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3716 #endif |
|
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3717 |
|
12163
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3718 if (EnableInvokeDynamic) { |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3719 // 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
|
3720 // 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
|
3721 // signature polymorphic MH intrinsics can be missed |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3722 // (see SystemDictionary::find_method_handle_intrinsic). |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3723 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
|
3724 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
|
3725 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
|
3726 } |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3727 |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3728 #if INCLUDE_MANAGEMENT |
| 0 | 3729 Management::initialize(THREAD); |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3730 #endif // INCLUDE_MANAGEMENT |
|
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3731 |
| 0 | 3732 if (HAS_PENDING_EXCEPTION) { |
| 3733 // management agent fails to start possibly due to | |
| 3734 // configuration problem and is responsible for printing | |
| 3735 // stack trace if appropriate. Simply exit VM. | |
| 3736 vm_exit(1); | |
| 3737 } | |
| 3738 | |
| 3739 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); | |
| 3740 if (MemProfiling) MemProfiler::engage(); | |
| 3741 StatSampler::engage(); | |
| 3742 if (CheckJNICalls) JniPeriodicChecker::engage(); | |
| 3743 | |
| 3744 BiasedLocking::init(); | |
| 3745 | |
| 17780 | 3746 #if INCLUDE_RTM_OPT |
| 3747 RTMLockingCounters::init(); | |
| 3748 #endif | |
| 3749 | |
|
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3750 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
|
3751 call_postVMInitHook(THREAD); |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3752 // 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
|
3753 // exceptions and provide means of diagnosis. |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3754 if (HAS_PENDING_EXCEPTION) { |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3755 CLEAR_PENDING_EXCEPTION; |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3756 } |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3757 } |
| 0 | 3758 |
|
6939
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3759 { |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3760 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
|
3761 // 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
|
3762 // or by dynamic enrollment. |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3763 WatcherThread::make_startable(); |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3764 // 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
|
3765 // 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
|
3766 // 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
|
3767 // 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
|
3768 if (PeriodicTask::num_tasks() > 0) { |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3769 WatcherThread::start(); |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3770 } |
| 0 | 3771 } |
| 3772 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3773 // Give os specific code one last chance to start |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3774 os::init_3(); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3775 |
| 0 | 3776 create_vm_timer.end(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3777 #ifdef ASSERT |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3778 _vm_complete = true; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3779 #endif |
| 0 | 3780 return JNI_OK; |
| 3781 } | |
| 3782 | |
| 3783 // type for the Agent_OnLoad and JVM_OnLoad entry points | |
| 3784 extern "C" { | |
| 3785 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); | |
| 3786 } | |
| 3787 // Find a command line agent library and return its entry point for | |
| 3788 // -agentlib: -agentpath: -Xrun | |
| 3789 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. | |
| 3790 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { | |
| 3791 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
|
3792 void *library = NULL; |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3793 |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3794 if (!agent->valid()) { |
| 0 | 3795 char buffer[JVM_MAXPATHLEN]; |
| 3796 char ebuf[1024]; | |
| 3797 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
|
3798 const char *msg = "Could not find agent library "; |
| 0 | 3799 |
| 12220 | 3800 // 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
|
3801 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
|
3802 library = agent->os_lib(); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3803 } else if (agent->is_absolute_path()) { |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3804 library = os::dll_load(name, ebuf, sizeof ebuf); |
| 0 | 3805 if (library == NULL) { |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3806 const char *sub_msg = " in absolute path, with error: "; |
|
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3807 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
| 6197 | 3808 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3809 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
| 0 | 3810 // If we can't find the agent, exit. |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3811 vm_exit_during_initialization(buf, NULL); |
| 6197 | 3812 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
| 0 | 3813 } |
| 3814 } else { | |
| 3815 // Try to load the agent from the standard dll directory | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3816 if (os::dll_build_name(buffer, sizeof(buffer), Arguments::get_dll_dir(), |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3817 name)) { |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3818 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3819 } |
| 0 | 3820 if (library == NULL) { // Try the local directory |
| 3821 char ns[1] = {0}; | |
|
6966
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3822 if (os::dll_build_name(buffer, sizeof(buffer), ns, name)) { |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3823 library = os::dll_load(buffer, ebuf, sizeof ebuf); |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3824 } |
| 0 | 3825 if (library == NULL) { |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3826 const char *sub_msg = " on the library path, with error: "; |
|
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3827 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
| 6197 | 3828 char *buf = NEW_C_HEAP_ARRAY(char, len, mtThread); |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3829 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
| 0 | 3830 // If we can't find the agent, exit. |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3831 vm_exit_during_initialization(buf, NULL); |
| 6197 | 3832 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
| 0 | 3833 } |
| 3834 } | |
| 3835 } | |
| 3836 agent->set_os_lib(library); | |
|
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3837 agent->set_valid(); |
| 0 | 3838 } |
| 3839 | |
| 3840 // Find the OnLoad function. | |
|
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3841 on_load_entry = |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3842 CAST_TO_FN_PTR(OnLoadEntry_t, os::find_agent_function(agent, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3843 false, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3844 on_load_symbols, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3845 num_symbol_entries)); |
| 0 | 3846 return on_load_entry; |
| 3847 } | |
| 3848 | |
| 3849 // Find the JVM_OnLoad entry point | |
| 3850 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { | |
| 3851 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; | |
| 3852 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
| 3853 } | |
| 3854 | |
| 3855 // Find the Agent_OnLoad entry point | |
| 3856 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { | |
| 3857 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; | |
| 3858 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
| 3859 } | |
| 3860 | |
| 3861 // For backwards compatibility with -Xrun | |
| 3862 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be | |
| 3863 // treated like -agentpath: | |
| 3864 // Must be called before agent libraries are created | |
| 3865 void Threads::convert_vm_init_libraries_to_agents() { | |
| 3866 AgentLibrary* agent; | |
| 3867 AgentLibrary* next; | |
| 3868 | |
| 3869 for (agent = Arguments::libraries(); agent != NULL; agent = next) { | |
| 3870 next = agent->next(); // cache the next agent now as this agent may get moved off this list | |
| 3871 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
| 3872 | |
| 3873 // If there is an JVM_OnLoad function it will get called later, | |
| 3874 // otherwise see if there is an Agent_OnLoad | |
| 3875 if (on_load_entry == NULL) { | |
| 3876 on_load_entry = lookup_agent_on_load(agent); | |
| 3877 if (on_load_entry != NULL) { | |
| 3878 // switch it to the agent list -- so that Agent_OnLoad will be called, | |
| 3879 // JVM_OnLoad won't be attempted and Agent_OnUnload will | |
| 3880 Arguments::convert_library_to_agent(agent); | |
| 3881 } else { | |
| 3882 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); | |
| 3883 } | |
| 3884 } | |
| 3885 } | |
| 3886 } | |
| 3887 | |
| 3888 // Create agents for -agentlib: -agentpath: and converted -Xrun | |
| 3889 // Invokes Agent_OnLoad | |
| 3890 // Called very early -- before JavaThreads exist | |
| 3891 void Threads::create_vm_init_agents() { | |
| 3892 extern struct JavaVM_ main_vm; | |
| 3893 AgentLibrary* agent; | |
| 3894 | |
| 3895 JvmtiExport::enter_onload_phase(); | |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3896 |
| 0 | 3897 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
| 3898 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); | |
| 3899 | |
| 3900 if (on_load_entry != NULL) { | |
| 3901 // Invoke the Agent_OnLoad function | |
| 3902 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
| 3903 if (err != JNI_OK) { | |
| 3904 vm_exit_during_initialization("agent library failed to init", agent->name()); | |
| 3905 } | |
| 3906 } else { | |
| 3907 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); | |
| 3908 } | |
| 3909 } | |
| 3910 JvmtiExport::enter_primordial_phase(); | |
| 3911 } | |
| 3912 | |
| 3913 extern "C" { | |
| 3914 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); | |
| 3915 } | |
| 3916 | |
| 3917 void Threads::shutdown_vm_agents() { | |
| 3918 // Send any Agent_OnUnload notifications | |
| 3919 const char *on_unload_symbols[] = AGENT_ONUNLOAD_SYMBOLS; | |
|
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3920 size_t num_symbol_entries = ARRAY_SIZE(on_unload_symbols); |
| 0 | 3921 extern struct JavaVM_ main_vm; |
| 3922 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
| 3923 | |
| 3924 // Find the Agent_OnUnload function. | |
|
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3925 Agent_OnUnload_t unload_entry = CAST_TO_FN_PTR(Agent_OnUnload_t, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3926 os::find_agent_function(agent, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3927 false, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3928 on_unload_symbols, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3929 num_symbol_entries)); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
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11154
diff
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|
3930 |
|
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11154
diff
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|
3931 // Invoke the Agent_OnUnload function |
|
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8014135: The JVMTI specification does not conform to recent changes in JNI specification
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11154
diff
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|
3932 if (unload_entry != NULL) { |
|
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8014135: The JVMTI specification does not conform to recent changes in JNI specification
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11154
diff
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|
3933 JavaThread* thread = JavaThread::current(); |
|
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8014135: The JVMTI specification does not conform to recent changes in JNI specification
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11154
diff
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|
3934 ThreadToNativeFromVM ttn(thread); |
|
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8014135: The JVMTI specification does not conform to recent changes in JNI specification
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11154
diff
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|
3935 HandleMark hm(thread); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
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changeset
|
3936 (*unload_entry)(&main_vm); |
| 0 | 3937 } |
| 3938 } | |
| 3939 } | |
| 3940 | |
| 3941 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries | |
| 3942 // Invokes JVM_OnLoad | |
| 3943 void Threads::create_vm_init_libraries() { | |
| 3944 extern struct JavaVM_ main_vm; | |
| 3945 AgentLibrary* agent; | |
| 3946 | |
| 3947 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { | |
| 3948 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
| 3949 | |
| 3950 if (on_load_entry != NULL) { | |
| 3951 // Invoke the JVM_OnLoad function | |
| 3952 JavaThread* thread = JavaThread::current(); | |
| 3953 ThreadToNativeFromVM ttn(thread); | |
| 3954 HandleMark hm(thread); | |
| 3955 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
| 3956 if (err != JNI_OK) { | |
| 3957 vm_exit_during_initialization("-Xrun library failed to init", agent->name()); | |
| 3958 } | |
| 3959 } else { | |
| 3960 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); | |
| 3961 } | |
| 3962 } | |
| 3963 } | |
| 3964 | |
| 20393 | 3965 JavaThread* Threads::find_java_thread_from_java_tid(jlong java_tid) { |
| 3966 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); | |
| 3967 | |
| 3968 JavaThread* java_thread = NULL; | |
| 3969 // Sequential search for now. Need to do better optimization later. | |
| 3970 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
| 3971 oop tobj = thread->threadObj(); | |
| 3972 if (!thread->is_exiting() && | |
| 3973 tobj != NULL && | |
| 3974 java_tid == java_lang_Thread::thread_id(tobj)) { | |
| 3975 java_thread = thread; | |
| 3976 break; | |
| 3977 } | |
| 3978 } | |
| 3979 return java_thread; | |
| 3980 } | |
| 3981 | |
| 3982 | |
| 0 | 3983 // Last thread running calls java.lang.Shutdown.shutdown() |
| 3984 void JavaThread::invoke_shutdown_hooks() { | |
| 3985 HandleMark hm(this); | |
| 3986 | |
| 3987 // We could get here with a pending exception, if so clear it now. | |
| 3988 if (this->has_pending_exception()) { | |
| 3989 this->clear_pending_exception(); | |
| 3990 } | |
| 3991 | |
| 3992 EXCEPTION_MARK; | |
|
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da91efe96a93
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|
3993 Klass* k = |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2162
diff
changeset
|
3994 SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
| 0 | 3995 THREAD); |
| 3996 if (k != NULL) { | |
| 3997 // SystemDictionary::resolve_or_null will return null if there was | |
| 3998 // an exception. If we cannot load the Shutdown class, just don't | |
| 3999 // call Shutdown.shutdown() at all. This will mean the shutdown hooks | |
| 4000 // and finalizers (if runFinalizersOnExit is set) won't be run. | |
| 4001 // Note that if a shutdown hook was registered or runFinalizersOnExit | |
| 4002 // was called, the Shutdown class would have already been loaded | |
| 4003 // (Runtime.addShutdownHook and runFinalizersOnExit will load it). | |
| 4004 instanceKlassHandle shutdown_klass (THREAD, k); | |
| 4005 JavaValue result(T_VOID); | |
| 4006 JavaCalls::call_static(&result, | |
| 4007 shutdown_klass, | |
|
2177
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|
4008 vmSymbols::shutdown_method_name(), |
|
3582bf76420e
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coleenp
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2162
diff
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|
4009 vmSymbols::void_method_signature(), |
| 0 | 4010 THREAD); |
| 4011 } | |
| 4012 CLEAR_PENDING_EXCEPTION; | |
| 4013 } | |
| 4014 | |
| 4015 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when | |
| 4016 // the program falls off the end of main(). Another VM exit path is through | |
| 4017 // vm_exit() when the program calls System.exit() to return a value or when | |
| 4018 // there is a serious error in VM. The two shutdown paths are not exactly | |
| 4019 // the same, but they share Shutdown.shutdown() at Java level and before_exit() | |
| 4020 // and VM_Exit op at VM level. | |
| 4021 // | |
| 4022 // Shutdown sequence: | |
| 6197 | 4023 // + Shutdown native memory tracking if it is on |
| 0 | 4024 // + Wait until we are the last non-daemon thread to execute |
| 4025 // <-- every thing is still working at this moment --> | |
| 4026 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level | |
| 4027 // shutdown hooks, run finalizers if finalization-on-exit | |
| 4028 // + Call before_exit(), prepare for VM exit | |
| 4029 // > run VM level shutdown hooks (they are registered through JVM_OnExit(), | |
| 4030 // currently the only user of this mechanism is File.deleteOnExit()) | |
| 4031 // > stop flat profiler, StatSampler, watcher thread, CMS threads, | |
| 4032 // post thread end and vm death events to JVMTI, | |
| 4033 // stop signal thread | |
| 4034 // + Call JavaThread::exit(), it will: | |
| 4035 // > release JNI handle blocks, remove stack guard pages | |
| 4036 // > remove this thread from Threads list | |
| 4037 // <-- no more Java code from this thread after this point --> | |
| 4038 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop | |
| 4039 // the compiler threads at safepoint | |
| 4040 // <-- do not use anything that could get blocked by Safepoint --> | |
| 4041 // + Disable tracing at JNI/JVM barriers | |
| 4042 // + Set _vm_exited flag for threads that are still running native code | |
| 4043 // + Delete this thread | |
| 4044 // + Call exit_globals() | |
| 4045 // > deletes tty | |
| 4046 // > deletes PerfMemory resources | |
| 4047 // + Return to caller | |
| 4048 | |
| 4049 bool Threads::destroy_vm() { | |
| 4050 JavaThread* thread = JavaThread::current(); | |
| 4051 | |
|
6725
da91efe96a93
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|
4052 #ifdef ASSERT |
|
da91efe96a93
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coleenp
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diff
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|
4053 _vm_complete = false; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6198
diff
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|
4054 #endif |
| 0 | 4055 // Wait until we are the last non-daemon thread to execute |
| 4056 { MutexLocker nu(Threads_lock); | |
| 4057 while (Threads::number_of_non_daemon_threads() > 1 ) | |
| 4058 // This wait should make safepoint checks, wait without a timeout, | |
| 4059 // and wait as a suspend-equivalent condition. | |
| 4060 // | |
| 4061 // Note: If the FlatProfiler is running and this thread is waiting | |
| 4062 // for another non-daemon thread to finish, then the FlatProfiler | |
| 4063 // is waiting for the external suspend request on this thread to | |
| 4064 // complete. wait_for_ext_suspend_completion() will eventually | |
| 4065 // timeout, but that takes time. Making this wait a suspend- | |
| 4066 // equivalent condition solves that timeout problem. | |
| 4067 // | |
| 4068 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
| 4069 Mutex::_as_suspend_equivalent_flag); | |
| 4070 } | |
| 4071 | |
| 4072 // Hang forever on exit if we are reporting an error. | |
| 4073 if (ShowMessageBoxOnError && is_error_reported()) { | |
| 4074 os::infinite_sleep(); | |
| 4075 } | |
|
2302
da091bb67459
7022037: Pause when exiting if debugger is attached on windows
sla
parents:
2203
diff
changeset
|
4076 os::wait_for_keypress_at_exit(); |
| 0 | 4077 |
| 4078 if (JDK_Version::is_jdk12x_version()) { | |
| 4079 // We are the last thread running, so check if finalizers should be run. | |
| 4080 // For 1.3 or later this is done in thread->invoke_shutdown_hooks() | |
| 4081 HandleMark rm(thread); | |
| 4082 Universe::run_finalizers_on_exit(); | |
| 4083 } else { | |
| 4084 // run Java level shutdown hooks | |
| 4085 thread->invoke_shutdown_hooks(); | |
| 4086 } | |
| 4087 | |
| 4088 before_exit(thread); | |
| 4089 | |
| 4090 thread->exit(true); | |
| 4091 | |
| 4092 // Stop VM thread. | |
| 4093 { | |
| 4094 // 4945125 The vm thread comes to a safepoint during exit. | |
| 4095 // GC vm_operations can get caught at the safepoint, and the | |
| 4096 // heap is unparseable if they are caught. Grab the Heap_lock | |
| 4097 // to prevent this. The GC vm_operations will not be able to | |
| 17992 | 4098 // queue until after the vm thread is dead. After this point, |
| 4099 // we'll never emerge out of the safepoint before the VM exits. | |
|
3769
ef2d1b8f2dd4
7051430: CMS: ongoing CMS cycle should terminate abruptly to allow prompt JVM termination at exit
ysr
parents:
3388
diff
changeset
|
4100 |
| 0 | 4101 MutexLocker ml(Heap_lock); |
| 4102 | |
| 4103 VMThread::wait_for_vm_thread_exit(); | |
| 4104 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); | |
| 4105 VMThread::destroy(); | |
| 4106 } | |
| 4107 | |
| 4108 // clean up ideal graph printers | |
| 4109 #if defined(COMPILER2) && !defined(PRODUCT) | |
| 4110 IdealGraphPrinter::clean_up(); | |
| 4111 #endif | |
| 4112 | |
| 4113 // Now, all Java threads are gone except daemon threads. Daemon threads | |
| 4114 // running Java code or in VM are stopped by the Safepoint. However, | |
| 4115 // daemon threads executing native code are still running. But they | |
| 4116 // will be stopped at native=>Java/VM barriers. Note that we can't | |
| 4117 // simply kill or suspend them, as it is inherently deadlock-prone. | |
| 4118 | |
| 4119 #ifndef PRODUCT | |
| 4120 // disable function tracing at JNI/JVM barriers | |
| 4121 TraceJNICalls = false; | |
| 4122 TraceJVMCalls = false; | |
| 4123 TraceRuntimeCalls = false; | |
| 4124 #endif | |
| 4125 | |
| 4126 VM_Exit::set_vm_exited(); | |
| 4127 | |
| 4128 notify_vm_shutdown(); | |
| 4129 | |
| 4130 delete thread; | |
| 4131 | |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
4132 #ifdef JVMCI |
|
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
4133 if (JVMCICounterSize > 0) { |
|
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
4134 FREE_C_HEAP_ARRAY(jlong, JavaThread::_jvmci_old_thread_counters, mtInternal); |
|
13796
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
4135 } |
|
21559
be896a1983c0
recast all Graal native code as JVMCI code (JBS:GRAAL-53)
Doug Simon <doug.simon@oracle.com>
parents:
20804
diff
changeset
|
4136 #endif // JVMCI |
|
13796
8cd953e97e2d
rework of benchmark counters: fix size at VM entry, not at build time
Lukas Stadler <lukas.stadler@jku.at>
parents:
13739
diff
changeset
|
4137 |
| 0 | 4138 // exit_globals() will delete tty |
| 4139 exit_globals(); | |
| 4140 | |
| 4141 return true; | |
| 4142 } | |
| 4143 | |
| 4144 | |
| 4145 jboolean Threads::is_supported_jni_version_including_1_1(jint version) { | |
| 4146 if (version == JNI_VERSION_1_1) return JNI_TRUE; | |
| 4147 return is_supported_jni_version(version); | |
| 4148 } | |
| 4149 | |
| 4150 | |
| 4151 jboolean Threads::is_supported_jni_version(jint version) { | |
| 4152 if (version == JNI_VERSION_1_2) return JNI_TRUE; | |
| 4153 if (version == JNI_VERSION_1_4) return JNI_TRUE; | |
| 4154 if (version == JNI_VERSION_1_6) return JNI_TRUE; | |
|
8793
499ccc15bbc8
8005716: Enhance JNI specification to allow support of static JNI libraries in Embedded JREs
bpittore
parents:
8673
diff
changeset
|
4155 if (version == JNI_VERSION_1_8) return JNI_TRUE; |
| 0 | 4156 return JNI_FALSE; |
| 4157 } | |
| 4158 | |
| 4159 | |
| 4160 void Threads::add(JavaThread* p, bool force_daemon) { | |
| 4161 // The threads lock must be owned at this point | |
| 4162 assert_locked_or_safepoint(Threads_lock); | |
|
1842
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
4163 |
|
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
4164 // 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
|
4165 // why it is called here. |
|
6e0aac35bfa9
6980838: G1: guarantee(false) failed: thread has an unexpected active value in its SATB queue
tonyp
parents:
1838
diff
changeset
|
4166 p->initialize_queues(); |
| 0 | 4167 p->set_next(_thread_list); |
| 4168 _thread_list = p; | |
| 4169 _number_of_threads++; | |
| 4170 oop threadObj = p->threadObj(); | |
| 4171 bool daemon = true; | |
| 4172 // Bootstrapping problem: threadObj can be null for initial | |
| 4173 // JavaThread (or for threads attached via JNI) | |
| 4174 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { | |
| 4175 _number_of_non_daemon_threads++; | |
| 4176 daemon = false; | |
| 4177 } | |
| 4178 | |
| 4179 ThreadService::add_thread(p, daemon); | |
| 4180 | |
| 4181 // Possible GC point. | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4800
diff
changeset
|
4182 Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
| 0 | 4183 } |
| 4184 | |
| 4185 void Threads::remove(JavaThread* p) { | |
| 4186 // Extra scope needed for Thread_lock, so we can check | |
| 4187 // that we do not remove thread without safepoint code notice | |
| 4188 { MutexLocker ml(Threads_lock); | |
| 4189 | |
| 4190 assert(includes(p), "p must be present"); | |
| 4191 | |
| 4192 JavaThread* current = _thread_list; | |
| 4193 JavaThread* prev = NULL; | |
| 4194 | |
| 4195 while (current != p) { | |
| 4196 prev = current; | |
| 4197 current = current->next(); | |
| 4198 } | |
| 4199 | |
| 4200 if (prev) { | |
| 4201 prev->set_next(current->next()); | |
| 4202 } else { | |
| 4203 _thread_list = p->next(); | |
| 4204 } | |
| 4205 _number_of_threads--; | |
| 4206 oop threadObj = p->threadObj(); | |
| 4207 bool daemon = true; | |
| 4208 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { | |
| 4209 _number_of_non_daemon_threads--; | |
| 4210 daemon = false; | |
| 4211 | |
| 4212 // Only one thread left, do a notify on the Threads_lock so a thread waiting | |
| 4213 // on destroy_vm will wake up. | |
| 4214 if (number_of_non_daemon_threads() == 1) | |
| 4215 Threads_lock->notify_all(); | |
| 4216 } | |
| 4217 ThreadService::remove_thread(p, daemon); | |
| 4218 | |
| 4219 // Make sure that safepoint code disregard this thread. This is needed since | |
| 4220 // the thread might mess around with locks after this point. This can cause it | |
| 4221 // to do callbacks into the safepoint code. However, the safepoint code is not aware | |
| 4222 // of this thread since it is removed from the queue. | |
| 4223 p->set_terminated_value(); | |
| 4224 } // unlock Threads_lock | |
| 4225 | |
| 4226 // 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
|
4227 Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
| 0 | 4228 } |
| 4229 | |
| 4230 // Threads_lock must be held when this is called (or must be called during a safepoint) | |
| 4231 bool Threads::includes(JavaThread* p) { | |
| 4232 assert(Threads_lock->is_locked(), "sanity check"); | |
| 4233 ALL_JAVA_THREADS(q) { | |
| 4234 if (q == p ) { | |
| 4235 return true; | |
| 4236 } | |
| 4237 } | |
| 4238 return false; | |
| 4239 } | |
| 4240 | |
| 4241 // Operations on the Threads list for GC. These are not explicitly locked, | |
| 4242 // but the garbage collector must provide a safe context for them to run. | |
| 4243 // In particular, these things should never be called when the Threads_lock | |
| 4244 // is held by some other thread. (Note: the Safepoint abstraction also | |
| 4245 // uses the Threads_lock to gurantee this property. It also makes sure that | |
| 4246 // all threads gets blocked when exiting or starting). | |
| 4247 | |
|
20259
4af19b914f53
8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do
stefank
parents:
20197
diff
changeset
|
4248 void Threads::oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) { |
| 0 | 4249 ALL_JAVA_THREADS(p) { |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
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7177
diff
changeset
|
4250 p->oops_do(f, cld_f, cf); |
| 0 | 4251 } |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
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7177
diff
changeset
|
4252 VMThread::vm_thread()->oops_do(f, cld_f, cf); |
| 0 | 4253 } |
| 4254 | |
|
20259
4af19b914f53
8035393: Use CLDClosure instead of CLDToOopClosure in frame::oops_interpreted_do
stefank
parents:
20197
diff
changeset
|
4255 void Threads::possibly_parallel_oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf) { |
| 0 | 4256 // Introduce a mechanism allowing parallel threads to claim threads as |
| 4257 // root groups. Overhead should be small enough to use all the time, | |
| 4258 // even in sequential code. | |
| 4259 SharedHeap* sh = SharedHeap::heap(); | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4042
diff
changeset
|
4260 // Cannot yet substitute active_workers for n_par_threads |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4261 // because of G1CollectedHeap::verify() use of |
|
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20259
diff
changeset
|
4262 // SharedHeap::process_roots(). n_par_threads == 0 will |
|
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20259
diff
changeset
|
4263 // turn off parallelism in process_roots while active_workers |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4264 // is being used for parallelism elsewhere. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4265 bool is_par = sh->n_par_threads() > 0; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4266 assert(!is_par || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4267 (SharedHeap::heap()->n_par_threads() == |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4042
diff
changeset
|
4268 SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
| 0 | 4269 int cp = SharedHeap::heap()->strong_roots_parity(); |
| 4270 ALL_JAVA_THREADS(p) { | |
| 4271 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
|
4272 p->oops_do(f, cld_f, cf); |
| 0 | 4273 } |
| 4274 } | |
| 4275 VMThread* vmt = VMThread::vm_thread(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4276 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
|
4277 vmt->oops_do(f, cld_f, cf); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3938
diff
changeset
|
4278 } |
| 0 | 4279 } |
| 4280 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4281 #if INCLUDE_ALL_GCS |
| 0 | 4282 // Used by ParallelScavenge |
| 4283 void Threads::create_thread_roots_tasks(GCTaskQueue* q) { | |
| 4284 ALL_JAVA_THREADS(p) { | |
| 4285 q->enqueue(new ThreadRootsTask(p)); | |
| 4286 } | |
| 4287 q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); | |
| 4288 } | |
| 4289 | |
| 4290 // Used by Parallel Old | |
| 4291 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { | |
| 4292 ALL_JAVA_THREADS(p) { | |
| 4293 q->enqueue(new ThreadRootsMarkingTask(p)); | |
| 4294 } | |
| 4295 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); | |
| 4296 } | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4297 #endif // INCLUDE_ALL_GCS |
| 0 | 4298 |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4299 void Threads::nmethods_do(CodeBlobClosure* cf) { |
| 0 | 4300 ALL_JAVA_THREADS(p) { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4301 p->nmethods_do(cf); |
| 0 | 4302 } |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
4303 VMThread::vm_thread()->nmethods_do(cf); |
| 0 | 4304 } |
| 4305 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4306 void Threads::metadata_do(void f(Metadata*)) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4307 ALL_JAVA_THREADS(p) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4308 p->metadata_do(f); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4309 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4310 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
4311 |
| 0 | 4312 void Threads::gc_epilogue() { |
| 4313 ALL_JAVA_THREADS(p) { | |
| 4314 p->gc_epilogue(); | |
| 4315 } | |
| 4316 } | |
| 4317 | |
| 4318 void Threads::gc_prologue() { | |
| 4319 ALL_JAVA_THREADS(p) { | |
| 4320 p->gc_prologue(); | |
| 4321 } | |
| 4322 } | |
| 4323 | |
| 4324 void Threads::deoptimized_wrt_marked_nmethods() { | |
| 4325 ALL_JAVA_THREADS(p) { | |
| 4326 p->deoptimized_wrt_marked_nmethods(); | |
| 4327 } | |
| 4328 } | |
| 4329 | |
| 4330 | |
| 4331 // Get count Java threads that are waiting to enter the specified monitor. | |
| 4332 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, | |
| 4333 address monitor, bool doLock) { | |
| 4334 assert(doLock || SafepointSynchronize::is_at_safepoint(), | |
| 4335 "must grab Threads_lock or be at safepoint"); | |
| 4336 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); | |
| 4337 | |
| 4338 int i = 0; | |
| 4339 { | |
| 4340 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
| 4341 ALL_JAVA_THREADS(p) { | |
|
15463
a20be10ad437
made Graal work with the HotSpot compiler queue and compiler threads, enabled by -XX:-UseGraalCompilationQueue
Doug Simon <doug.simon@oracle.com>
parents:
15352
diff
changeset
|
4342 if (!p->can_call_java()) continue; |
| 0 | 4343 |
| 4344 address pending = (address)p->current_pending_monitor(); | |
| 4345 if (pending == monitor) { // found a match | |
| 4346 if (i < count) result->append(p); // save the first count matches | |
| 4347 i++; | |
| 4348 } | |
| 4349 } | |
| 4350 } | |
| 4351 return result; | |
| 4352 } | |
| 4353 | |
| 4354 | |
| 4355 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { | |
| 4356 assert(doLock || | |
| 4357 Threads_lock->owned_by_self() || | |
| 4358 SafepointSynchronize::is_at_safepoint(), | |
| 4359 "must grab Threads_lock or be at safepoint"); | |
| 4360 | |
| 4361 // NULL owner means not locked so we can skip the search | |
| 4362 if (owner == NULL) return NULL; | |
| 4363 | |
| 4364 { | |
| 4365 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
| 4366 ALL_JAVA_THREADS(p) { | |
| 4367 // first, see if owner is the address of a Java thread | |
| 4368 if (owner == (address)p) return p; | |
| 4369 } | |
| 4370 } | |
|
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4371 // Cannot assert on lack of success here 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
|
4372 // 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
|
4373 // like deadlock detection. |
| 0 | 4374 if (UseHeavyMonitors) return NULL; |
| 4375 | |
| 4376 // | |
| 4377 // If we didn't find a matching Java thread and we didn't force use of | |
| 4378 // heavyweight monitors, then the owner is the stack address of the | |
| 4379 // Lock Word in the owning Java thread's stack. | |
| 4380 // | |
| 4381 JavaThread* the_owner = NULL; | |
| 4382 { | |
| 4383 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
| 4384 ALL_JAVA_THREADS(q) { | |
|
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4385 if (q->is_lock_owned(owner)) { |
| 0 | 4386 the_owner = q; |
|
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4387 break; |
| 0 | 4388 } |
| 4389 } | |
| 4390 } | |
|
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4391 // cannot assert on lack of success here; see above comment |
| 0 | 4392 return the_owner; |
| 4393 } | |
| 4394 | |
| 4395 // Threads::print_on() is called at safepoint by VM_PrintThreads operation. | |
| 4396 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { | |
| 4397 char buf[32]; | |
| 18041 | 4398 st->print_raw_cr(os::local_time_string(buf, sizeof(buf))); |
| 0 | 4399 |
| 4400 st->print_cr("Full thread dump %s (%s %s):", | |
| 4401 Abstract_VM_Version::vm_name(), | |
| 4402 Abstract_VM_Version::vm_release(), | |
| 4403 Abstract_VM_Version::vm_info_string() | |
| 4404 ); | |
| 4405 st->cr(); | |
| 4406 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4407 #if INCLUDE_ALL_GCS |
| 0 | 4408 // Dump concurrent locks |
| 4409 ConcurrentLocksDump concurrent_locks; | |
| 4410 if (print_concurrent_locks) { | |
| 4411 concurrent_locks.dump_at_safepoint(); | |
| 4412 } | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4413 #endif // INCLUDE_ALL_GCS |
| 0 | 4414 |
| 4415 ALL_JAVA_THREADS(p) { | |
| 4416 ResourceMark rm; | |
| 4417 p->print_on(st); | |
| 4418 if (print_stacks) { | |
| 4419 if (internal_format) { | |
| 4420 p->trace_stack(); | |
| 4421 } else { | |
| 4422 p->print_stack_on(st); | |
| 4423 } | |
| 4424 } | |
| 4425 st->cr(); | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4426 #if INCLUDE_ALL_GCS |
| 0 | 4427 if (print_concurrent_locks) { |
| 4428 concurrent_locks.print_locks_on(p, st); | |
| 4429 } | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4430 #endif // INCLUDE_ALL_GCS |
| 0 | 4431 } |
| 4432 | |
| 4433 VMThread::vm_thread()->print_on(st); | |
| 4434 st->cr(); | |
| 4435 Universe::heap()->print_gc_threads_on(st); | |
| 4436 WatcherThread* wt = WatcherThread::watcher_thread(); | |
| 6766 | 4437 if (wt != NULL) { |
| 4438 wt->print_on(st); | |
| 4439 st->cr(); | |
| 4440 } | |
| 0 | 4441 CompileBroker::print_compiler_threads_on(st); |
| 4442 st->flush(); | |
| 4443 } | |
| 4444 | |
| 4445 // Threads::print_on_error() is called by fatal error handler. It's possible | |
| 4446 // that VM is not at safepoint and/or current thread is inside signal handler. | |
| 4447 // Don't print stack trace, as the stack may not be walkable. Don't allocate | |
| 4448 // memory (even in resource area), it might deadlock the error handler. | |
| 4449 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { | |
| 4450 bool found_current = false; | |
| 4451 st->print_cr("Java Threads: ( => current thread )"); | |
| 4452 ALL_JAVA_THREADS(thread) { | |
| 4453 bool is_current = (current == thread); | |
| 4454 found_current = found_current || is_current; | |
| 4455 | |
| 4456 st->print("%s", is_current ? "=>" : " "); | |
| 4457 | |
| 4458 st->print(PTR_FORMAT, thread); | |
| 4459 st->print(" "); | |
| 4460 thread->print_on_error(st, buf, buflen); | |
| 4461 st->cr(); | |
| 4462 } | |
| 4463 st->cr(); | |
| 4464 | |
| 4465 st->print_cr("Other Threads:"); | |
| 4466 if (VMThread::vm_thread()) { | |
| 4467 bool is_current = (current == VMThread::vm_thread()); | |
| 4468 found_current = found_current || is_current; | |
| 4469 st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); | |
| 4470 | |
| 4471 st->print(PTR_FORMAT, VMThread::vm_thread()); | |
| 4472 st->print(" "); | |
| 4473 VMThread::vm_thread()->print_on_error(st, buf, buflen); | |
| 4474 st->cr(); | |
| 4475 } | |
| 4476 WatcherThread* wt = WatcherThread::watcher_thread(); | |
| 4477 if (wt != NULL) { | |
| 4478 bool is_current = (current == wt); | |
| 4479 found_current = found_current || is_current; | |
| 4480 st->print("%s", is_current ? "=>" : " "); | |
| 4481 | |
| 4482 st->print(PTR_FORMAT, wt); | |
| 4483 st->print(" "); | |
| 4484 wt->print_on_error(st, buf, buflen); | |
| 4485 st->cr(); | |
| 4486 } | |
| 4487 if (!found_current) { | |
| 4488 st->cr(); | |
| 4489 st->print("=>" PTR_FORMAT " (exited) ", current); | |
| 4490 current->print_on_error(st, buf, buflen); | |
| 4491 st->cr(); | |
| 4492 } | |
| 4493 } | |
| 4494 | |
| 1878 | 4495 // Internal SpinLock and Mutex |
| 4496 // Based on ParkEvent | |
| 4497 | |
| 4498 // Ad-hoc mutual exclusion primitives: SpinLock and Mux | |
| 0 | 4499 // |
| 1878 | 4500 // We employ SpinLocks _only for low-contention, fixed-length |
| 4501 // short-duration critical sections where we're concerned | |
| 4502 // about native mutex_t or HotSpot Mutex:: latency. | |
| 4503 // The mux construct provides a spin-then-block mutual exclusion | |
| 4504 // mechanism. | |
| 4505 // | |
| 4506 // Testing has shown that contention on the ListLock guarding gFreeList | |
| 4507 // is common. If we implement ListLock as a simple SpinLock it's common | |
| 4508 // for the JVM to devolve to yielding with little progress. This is true | |
| 4509 // despite the fact that the critical sections protected by ListLock are | |
| 4510 // extremely short. | |
| 0 | 4511 // |
| 1878 | 4512 // TODO-FIXME: ListLock should be of type SpinLock. |
| 4513 // We should make this a 1st-class type, integrated into the lock | |
| 4514 // hierarchy as leaf-locks. Critically, the SpinLock structure | |
| 4515 // should have sufficient padding to avoid false-sharing and excessive | |
| 4516 // cache-coherency traffic. | |
| 4517 | |
| 4518 | |
| 4519 typedef volatile int SpinLockT ; | |
| 4520 | |
| 4521 void Thread::SpinAcquire (volatile int * adr, const char * LockName) { | |
| 4522 if (Atomic::cmpxchg (1, adr, 0) == 0) { | |
| 4523 return ; // normal fast-path return | |
| 4524 } | |
| 4525 | |
| 4526 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy. | |
| 4527 TEVENT (SpinAcquire - ctx) ; | |
| 4528 int ctr = 0 ; | |
| 4529 int Yields = 0 ; | |
| 0 | 4530 for (;;) { |
| 1878 | 4531 while (*adr != 0) { |
| 4532 ++ctr ; | |
| 4533 if ((ctr & 0xFFF) == 0 || !os::is_MP()) { | |
| 4534 if (Yields > 5) { | |
|
17706
0e6af9b390af
8028280: ParkEvent leak when running modified runThese which only loads classes
dsimms
parents:
13004
diff
changeset
|
4535 os::naked_short_sleep(1); |
| 1878 | 4536 } else { |
| 4537 os::NakedYield() ; | |
| 4538 ++Yields ; | |
| 4539 } | |
| 4540 } else { | |
| 4541 SpinPause() ; | |
| 0 | 4542 } |
| 1878 | 4543 } |
| 4544 if (Atomic::cmpxchg (1, adr, 0) == 0) return ; | |
| 0 | 4545 } |
| 4546 } | |
| 4547 | |
| 1878 | 4548 void Thread::SpinRelease (volatile int * adr) { |
| 4549 assert (*adr != 0, "invariant") ; | |
| 4550 OrderAccess::fence() ; // guarantee at least release consistency. | |
| 4551 // Roach-motel semantics. | |
| 4552 // It's safe if subsequent LDs and STs float "up" into the critical section, | |
| 4553 // but prior LDs and STs within the critical section can't be allowed | |
| 4554 // to reorder or float past the ST that releases the lock. | |
| 4555 *adr = 0 ; | |
| 0 | 4556 } |
| 4557 | |
| 1878 | 4558 // muxAcquire and muxRelease: |
| 4559 // | |
| 4560 // * muxAcquire and muxRelease support a single-word lock-word construct. | |
| 4561 // The LSB of the word is set IFF the lock is held. | |
| 4562 // The remainder of the word points to the head of a singly-linked list | |
| 4563 // of threads blocked on the lock. | |
| 4564 // | |
| 4565 // * The current implementation of muxAcquire-muxRelease uses its own | |
| 4566 // dedicated Thread._MuxEvent instance. If we're interested in | |
| 4567 // minimizing the peak number of extant ParkEvent instances then | |
| 4568 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long | |
| 4569 // as certain invariants were satisfied. Specifically, care would need | |
| 4570 // to be taken with regards to consuming unpark() "permits". | |
| 4571 // A safe rule of thumb is that a thread would never call muxAcquire() | |
| 4572 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently | |
| 4573 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could | |
| 4574 // consume an unpark() permit intended for monitorenter, for instance. | |
| 4575 // One way around this would be to widen the restricted-range semaphore | |
| 4576 // implemented in park(). Another alternative would be to provide | |
| 4577 // multiple instances of the PlatformEvent() for each thread. One | |
| 4578 // instance would be dedicated to muxAcquire-muxRelease, for instance. | |
| 4579 // | |
| 4580 // * Usage: | |
| 4581 // -- Only as leaf locks | |
| 4582 // -- for short-term locking only as muxAcquire does not perform | |
| 4583 // thread state transitions. | |
| 4584 // | |
| 4585 // Alternatives: | |
| 4586 // * We could implement muxAcquire and muxRelease with MCS or CLH locks | |
| 4587 // but with parking or spin-then-park instead of pure spinning. | |
| 4588 // * Use Taura-Oyama-Yonenzawa locks. | |
| 4589 // * It's possible to construct a 1-0 lock if we encode the lockword as | |
| 4590 // (List,LockByte). Acquire will CAS the full lockword while Release | |
| 4591 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so | |
| 4592 // acquiring threads use timers (ParkTimed) to detect and recover from | |
| 4593 // the stranding window. Thread/Node structures must be aligned on 256-byte | |
| 4594 // boundaries by using placement-new. | |
| 4595 // * Augment MCS with advisory back-link fields maintained with CAS(). | |
| 4596 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. | |
| 4597 // The validity of the backlinks must be ratified before we trust the value. | |
| 4598 // If the backlinks are invalid the exiting thread must back-track through the | |
| 4599 // the forward links, which are always trustworthy. | |
| 4600 // * Add a successor indication. The LockWord is currently encoded as | |
| 4601 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable | |
| 4602 // to provide the usual futile-wakeup optimization. | |
| 4603 // See RTStt for details. | |
| 4604 // * Consider schedctl.sc_nopreempt to cover the critical section. | |
| 4605 // | |
| 4606 | |
| 4607 | |
| 4608 typedef volatile intptr_t MutexT ; // Mux Lock-word | |
| 4609 enum MuxBits { LOCKBIT = 1 } ; | |
| 4610 | |
| 4611 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { | |
| 4612 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
| 4613 if (w == 0) return ; | |
| 4614 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4615 return ; | |
| 4616 } | |
| 4617 | |
| 4618 TEVENT (muxAcquire - Contention) ; | |
| 4619 ParkEvent * const Self = Thread::current()->_MuxEvent ; | |
| 4620 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; | |
| 0 | 4621 for (;;) { |
| 1878 | 4622 int its = (os::is_MP() ? 100 : 0) + 1 ; |
| 4623 | |
| 4624 // Optional spin phase: spin-then-park strategy | |
| 4625 while (--its >= 0) { | |
| 4626 w = *Lock ; | |
| 4627 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4628 return ; | |
| 4629 } | |
| 4630 } | |
| 4631 | |
| 4632 Self->reset() ; | |
| 4633 Self->OnList = intptr_t(Lock) ; | |
| 4634 // The following fence() isn't _strictly necessary as the subsequent | |
| 4635 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
| 4636 OrderAccess::fence(); | |
| 4637 for (;;) { | |
| 4638 w = *Lock ; | |
| 4639 if ((w & LOCKBIT) == 0) { | |
| 4640 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4641 Self->OnList = 0 ; // hygiene - allows stronger asserts | |
| 4642 return ; | |
| 4643 } | |
| 4644 continue ; // Interference -- *Lock changed -- Just retry | |
| 0 | 4645 } |
| 1878 | 4646 assert (w & LOCKBIT, "invariant") ; |
| 4647 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
| 4648 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; | |
| 4649 } | |
| 4650 | |
| 4651 while (Self->OnList != 0) { | |
| 4652 Self->park() ; | |
| 4653 } | |
| 0 | 4654 } |
| 4655 } | |
| 4656 | |
| 1878 | 4657 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
| 4658 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
| 4659 if (w == 0) return ; | |
| 4660 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4661 return ; | |
| 4662 } | |
| 4663 | |
| 4664 TEVENT (muxAcquire - Contention) ; | |
| 4665 ParkEvent * ReleaseAfter = NULL ; | |
| 4666 if (ev == NULL) { | |
| 4667 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; | |
| 4668 } | |
| 4669 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; | |
| 4670 for (;;) { | |
| 4671 guarantee (ev->OnList == 0, "invariant") ; | |
| 4672 int its = (os::is_MP() ? 100 : 0) + 1 ; | |
| 4673 | |
| 4674 // Optional spin phase: spin-then-park strategy | |
| 4675 while (--its >= 0) { | |
| 4676 w = *Lock ; | |
| 4677 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4678 if (ReleaseAfter != NULL) { | |
| 4679 ParkEvent::Release (ReleaseAfter) ; | |
| 4680 } | |
| 4681 return ; | |
| 4682 } | |
| 4683 } | |
| 4684 | |
| 4685 ev->reset() ; | |
| 4686 ev->OnList = intptr_t(Lock) ; | |
| 4687 // The following fence() isn't _strictly necessary as the subsequent | |
| 4688 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
| 4689 OrderAccess::fence(); | |
| 4690 for (;;) { | |
| 4691 w = *Lock ; | |
| 4692 if ((w & LOCKBIT) == 0) { | |
| 4693 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4694 ev->OnList = 0 ; | |
| 4695 // We call ::Release while holding the outer lock, thus | |
| 4696 // artificially lengthening the critical section. | |
| 4697 // Consider deferring the ::Release() until the subsequent unlock(), | |
| 4698 // after we've dropped the outer lock. | |
| 4699 if (ReleaseAfter != NULL) { | |
| 4700 ParkEvent::Release (ReleaseAfter) ; | |
| 4701 } | |
| 4702 return ; | |
| 4703 } | |
| 4704 continue ; // Interference -- *Lock changed -- Just retry | |
| 4705 } | |
| 4706 assert (w & LOCKBIT, "invariant") ; | |
| 4707 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
| 4708 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; | |
| 4709 } | |
| 4710 | |
| 4711 while (ev->OnList != 0) { | |
| 4712 ev->park() ; | |
| 4713 } | |
| 4714 } | |
| 4715 } | |
| 4716 | |
| 4717 // Release() must extract a successor from the list and then wake that thread. | |
| 4718 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme | |
| 4719 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based | |
| 4720 // Release() would : | |
| 4721 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. | |
| 4722 // (B) Extract a successor from the private list "in-hand" | |
| 4723 // (C) attempt to CAS() the residual back into *Lock over null. | |
| 4724 // If there were any newly arrived threads and the CAS() would fail. | |
| 4725 // In that case Release() would detach the RATs, re-merge the list in-hand | |
| 4726 // with the RATs and repeat as needed. Alternately, Release() might | |
| 4727 // detach and extract a successor, but then pass the residual list to the wakee. | |
| 4728 // The wakee would be responsible for reattaching and remerging before it | |
| 4729 // competed for the lock. | |
| 4730 // | |
| 4731 // Both "pop" and DMR are immune from ABA corruption -- there can be | |
| 4732 // multiple concurrent pushers, but only one popper or detacher. | |
| 4733 // This implementation pops from the head of the list. This is unfair, | |
| 4734 // but tends to provide excellent throughput as hot threads remain hot. | |
| 4735 // (We wake recently run threads first). | |
| 4736 | |
| 4737 void Thread::muxRelease (volatile intptr_t * Lock) { | |
| 4738 for (;;) { | |
| 4739 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; | |
| 4740 assert (w & LOCKBIT, "invariant") ; | |
| 4741 if (w == LOCKBIT) return ; | |
| 4742 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; | |
| 4743 assert (List != NULL, "invariant") ; | |
| 4744 assert (List->OnList == intptr_t(Lock), "invariant") ; | |
| 4745 ParkEvent * nxt = List->ListNext ; | |
| 4746 | |
| 4747 // The following CAS() releases the lock and pops the head element. | |
| 4748 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { | |
| 4749 continue ; | |
| 4750 } | |
| 4751 List->OnList = 0 ; | |
| 4752 OrderAccess::fence() ; | |
| 4753 List->unpark () ; | |
| 4754 return ; | |
| 4755 } | |
| 4756 } | |
| 4757 | |
| 4758 | |
| 0 | 4759 void Threads::verify() { |
| 4760 ALL_JAVA_THREADS(p) { | |
| 4761 p->verify(); | |
| 4762 } | |
| 4763 VMThread* thread = VMThread::vm_thread(); | |
| 4764 if (thread != NULL) thread->verify(); | |
| 4765 } |