Mercurial > hg > truffle
annotate src/share/vm/runtime/thread.cpp @ 13212:eb03a7335eb0
Use fixed instead of virtual register for target in far foreign call, since the register allocator does not support virtual registers to be used at call sites.
| author | Christian Wimmer <christian.wimmer@oracle.com> |
|---|---|
| date | Mon, 02 Dec 2013 14:20:32 -0800 |
| parents | 6b2d8d20ecbd |
| children | 5a9afbf72714 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 7951 | 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/classLoader.hpp" | |
| 27 #include "classfile/javaClasses.hpp" | |
| 28 #include "classfile/systemDictionary.hpp" | |
| 29 #include "classfile/vmSymbols.hpp" | |
| 30 #include "code/scopeDesc.hpp" | |
| 31 #include "compiler/compileBroker.hpp" | |
|
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32 #ifdef GRAAL |
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33 #include "graal/graalCompiler.hpp" |
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34 #endif |
| 1972 | 35 #include "interpreter/interpreter.hpp" |
| 36 #include "interpreter/linkResolver.hpp" | |
|
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37 #include "interpreter/oopMapCache.hpp" |
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38 #include "jvmtifiles/jvmtiEnv.hpp" |
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39 #include "memory/gcLocker.inline.hpp" |
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40 #include "memory/metaspaceShared.hpp" |
| 1972 | 41 #include "memory/oopFactory.hpp" |
| 42 #include "memory/universe.inline.hpp" | |
| 43 #include "oops/instanceKlass.hpp" | |
| 44 #include "oops/objArrayOop.hpp" | |
| 45 #include "oops/oop.inline.hpp" | |
|
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46 #include "oops/symbol.hpp" |
| 1972 | 47 #include "prims/jvm_misc.hpp" |
| 48 #include "prims/jvmtiExport.hpp" | |
| 49 #include "prims/jvmtiThreadState.hpp" | |
| 50 #include "prims/privilegedStack.hpp" | |
| 51 #include "runtime/arguments.hpp" | |
| 52 #include "runtime/biasedLocking.hpp" | |
| 53 #include "runtime/deoptimization.hpp" | |
| 54 #include "runtime/fprofiler.hpp" | |
| 55 #include "runtime/frame.inline.hpp" | |
|
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56 #include "runtime/gpu.hpp" |
| 1972 | 57 #include "runtime/init.hpp" |
| 58 #include "runtime/interfaceSupport.hpp" | |
| 59 #include "runtime/java.hpp" | |
| 60 #include "runtime/javaCalls.hpp" | |
| 61 #include "runtime/jniPeriodicChecker.hpp" | |
| 62 #include "runtime/memprofiler.hpp" | |
| 63 #include "runtime/mutexLocker.hpp" | |
| 64 #include "runtime/objectMonitor.hpp" | |
| 65 #include "runtime/osThread.hpp" | |
| 66 #include "runtime/safepoint.hpp" | |
| 67 #include "runtime/sharedRuntime.hpp" | |
| 68 #include "runtime/statSampler.hpp" | |
| 69 #include "runtime/stubRoutines.hpp" | |
| 70 #include "runtime/task.hpp" | |
|
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71 #include "runtime/thread.inline.hpp" |
| 1972 | 72 #include "runtime/threadCritical.hpp" |
| 73 #include "runtime/threadLocalStorage.hpp" | |
| 74 #include "runtime/vframe.hpp" | |
| 75 #include "runtime/vframeArray.hpp" | |
| 76 #include "runtime/vframe_hp.hpp" | |
| 77 #include "runtime/vmThread.hpp" | |
| 78 #include "runtime/vm_operations.hpp" | |
| 79 #include "services/attachListener.hpp" | |
| 80 #include "services/management.hpp" | |
| 6197 | 81 #include "services/memTracker.hpp" |
| 1972 | 82 #include "services/threadService.hpp" |
| 10405 | 83 #include "trace/tracing.hpp" |
| 84 #include "trace/traceMacros.hpp" | |
| 1972 | 85 #include "utilities/defaultStream.hpp" |
| 86 #include "utilities/dtrace.hpp" | |
| 87 #include "utilities/events.hpp" | |
| 88 #include "utilities/preserveException.hpp" | |
|
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89 #include "utilities/macros.hpp" |
| 1972 | 90 #ifdef TARGET_OS_FAMILY_linux |
| 91 # include "os_linux.inline.hpp" | |
| 92 #endif | |
| 93 #ifdef TARGET_OS_FAMILY_solaris | |
| 94 # include "os_solaris.inline.hpp" | |
| 95 #endif | |
| 96 #ifdef TARGET_OS_FAMILY_windows | |
| 97 # include "os_windows.inline.hpp" | |
| 98 #endif | |
| 3960 | 99 #ifdef TARGET_OS_FAMILY_bsd |
| 100 # include "os_bsd.inline.hpp" | |
| 101 #endif | |
|
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102 #if INCLUDE_ALL_GCS |
| 1972 | 103 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" |
| 104 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
| 105 #include "gc_implementation/parallelScavenge/pcTasks.hpp" | |
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106 #endif // INCLUDE_ALL_GCS |
| 1972 | 107 #ifdef COMPILER1 |
| 108 #include "c1/c1_Compiler.hpp" | |
| 109 #endif | |
| 110 #ifdef COMPILER2 | |
| 111 #include "opto/c2compiler.hpp" | |
| 112 #include "opto/idealGraphPrinter.hpp" | |
| 113 #endif | |
| 0 | 114 |
| 115 #ifdef DTRACE_ENABLED | |
| 116 | |
| 117 // Only bother with this argument setup if dtrace is available | |
| 118 | |
| 4006 | 119 #ifndef USDT2 |
| 0 | 120 HS_DTRACE_PROBE_DECL(hotspot, vm__init__begin); |
| 121 HS_DTRACE_PROBE_DECL(hotspot, vm__init__end); | |
| 122 HS_DTRACE_PROBE_DECL5(hotspot, thread__start, char*, intptr_t, | |
| 123 intptr_t, intptr_t, bool); | |
| 124 HS_DTRACE_PROBE_DECL5(hotspot, thread__stop, char*, intptr_t, | |
| 125 intptr_t, intptr_t, bool); | |
| 126 | |
| 127 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
| 128 { \ | |
| 129 ResourceMark rm(this); \ | |
| 130 int len = 0; \ | |
| 131 const char* name = (javathread)->get_thread_name(); \ | |
| 132 len = strlen(name); \ | |
| 133 HS_DTRACE_PROBE5(hotspot, thread__##probe, \ | |
| 134 name, len, \ | |
| 135 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
| 136 (javathread)->osthread()->thread_id(), \ | |
| 137 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
| 138 } | |
| 139 | |
| 4006 | 140 #else /* USDT2 */ |
| 141 | |
| 142 #define HOTSPOT_THREAD_PROBE_start HOTSPOT_THREAD_PROBE_START | |
| 143 #define HOTSPOT_THREAD_PROBE_stop HOTSPOT_THREAD_PROBE_STOP | |
| 144 | |
| 145 #define DTRACE_THREAD_PROBE(probe, javathread) \ | |
| 146 { \ | |
| 147 ResourceMark rm(this); \ | |
| 148 int len = 0; \ | |
| 149 const char* name = (javathread)->get_thread_name(); \ | |
| 150 len = strlen(name); \ | |
| 151 HOTSPOT_THREAD_PROBE_##probe( /* probe = start, stop */ \ | |
| 152 (char *) name, len, \ | |
| 153 java_lang_Thread::thread_id((javathread)->threadObj()), \ | |
| 154 (uintptr_t) (javathread)->osthread()->thread_id(), \ | |
| 155 java_lang_Thread::is_daemon((javathread)->threadObj())); \ | |
| 156 } | |
| 157 | |
| 158 #endif /* USDT2 */ | |
| 159 | |
| 0 | 160 #else // ndef DTRACE_ENABLED |
| 161 | |
| 162 #define DTRACE_THREAD_PROBE(probe, javathread) | |
| 163 | |
| 164 #endif // ndef DTRACE_ENABLED | |
| 165 | |
| 6197 | 166 |
| 0 | 167 // Class hierarchy |
| 168 // - Thread | |
| 169 // - VMThread | |
| 170 // - WatcherThread | |
| 171 // - ConcurrentMarkSweepThread | |
| 172 // - JavaThread | |
| 173 // - CompilerThread | |
| 174 | |
| 175 // ======= Thread ======== | |
| 176 // Support for forcing alignment of thread objects for biased locking | |
| 6197 | 177 void* Thread::allocate(size_t size, bool throw_excpt, MEMFLAGS flags) { |
| 0 | 178 if (UseBiasedLocking) { |
| 179 const int alignment = markOopDesc::biased_lock_alignment; | |
| 180 size_t aligned_size = size + (alignment - sizeof(intptr_t)); | |
| 6197 | 181 void* real_malloc_addr = throw_excpt? AllocateHeap(aligned_size, flags, CURRENT_PC) |
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182 : AllocateHeap(aligned_size, flags, CURRENT_PC, |
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183 AllocFailStrategy::RETURN_NULL); |
| 0 | 184 void* aligned_addr = (void*) align_size_up((intptr_t) real_malloc_addr, alignment); |
| 185 assert(((uintptr_t) aligned_addr + (uintptr_t) size) <= | |
| 186 ((uintptr_t) real_malloc_addr + (uintptr_t) aligned_size), | |
| 187 "JavaThread alignment code overflowed allocated storage"); | |
| 188 if (TraceBiasedLocking) { | |
| 189 if (aligned_addr != real_malloc_addr) | |
| 190 tty->print_cr("Aligned thread " INTPTR_FORMAT " to " INTPTR_FORMAT, | |
| 191 real_malloc_addr, aligned_addr); | |
| 192 } | |
| 193 ((Thread*) aligned_addr)->_real_malloc_address = real_malloc_addr; | |
| 194 return aligned_addr; | |
| 195 } else { | |
| 6197 | 196 return throw_excpt? AllocateHeap(size, flags, CURRENT_PC) |
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197 : AllocateHeap(size, flags, CURRENT_PC, AllocFailStrategy::RETURN_NULL); |
| 0 | 198 } |
| 199 } | |
| 200 | |
| 201 void Thread::operator delete(void* p) { | |
| 202 if (UseBiasedLocking) { | |
| 203 void* real_malloc_addr = ((Thread*) p)->_real_malloc_address; | |
| 6197 | 204 FreeHeap(real_malloc_addr, mtThread); |
| 0 | 205 } else { |
| 6197 | 206 FreeHeap(p, mtThread); |
| 0 | 207 } |
| 208 } | |
| 209 | |
| 210 | |
| 211 // Base class for all threads: VMThread, WatcherThread, ConcurrentMarkSweepThread, | |
| 212 // JavaThread | |
| 213 | |
| 214 | |
| 215 Thread::Thread() { | |
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216 // stack and get_thread |
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217 set_stack_base(NULL); |
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218 set_stack_size(0); |
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219 set_self_raw_id(0); |
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220 set_lgrp_id(-1); |
| 0 | 221 |
| 222 // allocated data structures | |
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223 set_osthread(NULL); |
| 6197 | 224 set_resource_area(new (mtThread)ResourceArea()); |
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225 DEBUG_ONLY(_current_resource_mark = NULL;) |
| 6197 | 226 set_handle_area(new (mtThread) HandleArea(NULL)); |
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227 set_metadata_handles(new (ResourceObj::C_HEAP, mtClass) GrowableArray<Metadata*>(30, true)); |
| 0 | 228 set_active_handles(NULL); |
| 229 set_free_handle_block(NULL); | |
| 230 set_last_handle_mark(NULL); | |
| 231 | |
| 232 // This initial value ==> never claimed. | |
| 233 _oops_do_parity = 0; | |
| 234 | |
| 235 // the handle mark links itself to last_handle_mark | |
| 10135 | 236 new HandleMark(this); |
| 237 | |
| 0 | 238 // plain initialization |
| 239 debug_only(_owned_locks = NULL;) | |
| 240 debug_only(_allow_allocation_count = 0;) | |
| 241 NOT_PRODUCT(_allow_safepoint_count = 0;) | |
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242 NOT_PRODUCT(_skip_gcalot = false;) |
| 0 | 243 CHECK_UNHANDLED_OOPS_ONLY(_gc_locked_out_count = 0;) |
| 244 _jvmti_env_iteration_count = 0; | |
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245 set_allocated_bytes(0); |
| 0 | 246 _vm_operation_started_count = 0; |
| 247 _vm_operation_completed_count = 0; | |
| 248 _current_pending_monitor = NULL; | |
| 249 _current_pending_monitor_is_from_java = true; | |
| 250 _current_waiting_monitor = NULL; | |
| 251 _num_nested_signal = 0; | |
| 252 omFreeList = NULL ; | |
| 253 omFreeCount = 0 ; | |
| 254 omFreeProvision = 32 ; | |
| 1587 | 255 omInUseList = NULL ; |
| 256 omInUseCount = 0 ; | |
| 0 | 257 |
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258 #ifdef ASSERT |
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259 _visited_for_critical_count = false; |
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260 #endif |
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261 |
| 0 | 262 _SR_lock = new Monitor(Mutex::suspend_resume, "SR_lock", true); |
| 263 _suspend_flags = 0; | |
| 264 | |
| 265 // thread-specific hashCode stream generator state - Marsaglia shift-xor form | |
| 266 _hashStateX = os::random() ; | |
| 267 _hashStateY = 842502087 ; | |
| 268 _hashStateZ = 0x8767 ; // (int)(3579807591LL & 0xffff) ; | |
| 269 _hashStateW = 273326509 ; | |
| 270 | |
| 271 _OnTrap = 0 ; | |
| 272 _schedctl = NULL ; | |
| 273 _Stalled = 0 ; | |
| 274 _TypeTag = 0x2BAD ; | |
| 275 | |
| 276 // Many of the following fields are effectively final - immutable | |
| 277 // Note that nascent threads can't use the Native Monitor-Mutex | |
| 278 // construct until the _MutexEvent is initialized ... | |
| 279 // CONSIDER: instead of using a fixed set of purpose-dedicated ParkEvents | |
| 280 // we might instead use a stack of ParkEvents that we could provision on-demand. | |
| 281 // The stack would act as a cache to avoid calls to ParkEvent::Allocate() | |
| 282 // and ::Release() | |
| 283 _ParkEvent = ParkEvent::Allocate (this) ; | |
| 284 _SleepEvent = ParkEvent::Allocate (this) ; | |
| 285 _MutexEvent = ParkEvent::Allocate (this) ; | |
| 286 _MuxEvent = ParkEvent::Allocate (this) ; | |
| 287 | |
| 288 #ifdef CHECK_UNHANDLED_OOPS | |
| 289 if (CheckUnhandledOops) { | |
| 290 _unhandled_oops = new UnhandledOops(this); | |
| 291 } | |
| 292 #endif // CHECK_UNHANDLED_OOPS | |
| 293 #ifdef ASSERT | |
| 294 if (UseBiasedLocking) { | |
| 295 assert((((uintptr_t) this) & (markOopDesc::biased_lock_alignment - 1)) == 0, "forced alignment of thread object failed"); | |
| 296 assert(this == _real_malloc_address || | |
| 297 this == (void*) align_size_up((intptr_t) _real_malloc_address, markOopDesc::biased_lock_alignment), | |
| 298 "bug in forced alignment of thread objects"); | |
| 299 } | |
| 300 #endif /* ASSERT */ | |
| 301 } | |
| 302 | |
| 303 void Thread::initialize_thread_local_storage() { | |
| 304 // Note: Make sure this method only calls | |
| 305 // non-blocking operations. Otherwise, it might not work | |
| 306 // with the thread-startup/safepoint interaction. | |
| 307 | |
| 308 // During Java thread startup, safepoint code should allow this | |
| 309 // method to complete because it may need to allocate memory to | |
| 310 // store information for the new thread. | |
| 311 | |
| 312 // initialize structure dependent on thread local storage | |
| 313 ThreadLocalStorage::set_thread(this); | |
| 314 } | |
| 315 | |
| 316 void Thread::record_stack_base_and_size() { | |
| 317 set_stack_base(os::current_stack_base()); | |
| 318 set_stack_size(os::current_stack_size()); | |
|
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319 // CR 7190089: on Solaris, primordial thread's stack is adjusted |
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320 // in initialize_thread(). Without the adjustment, stack size is |
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321 // incorrect if stack is set to unlimited (ulimit -s unlimited). |
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322 // So far, only Solaris has real implementation of initialize_thread(). |
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323 // |
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324 // set up any platform-specific state. |
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325 os::initialize_thread(this); |
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326 |
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327 #if INCLUDE_NMT |
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328 // record thread's native stack, stack grows downward |
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329 address stack_low_addr = stack_base() - stack_size(); |
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330 MemTracker::record_thread_stack(stack_low_addr, stack_size(), this, |
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331 CURRENT_PC); |
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332 #endif // INCLUDE_NMT |
| 0 | 333 } |
| 334 | |
| 335 | |
| 336 Thread::~Thread() { | |
| 337 // Reclaim the objectmonitors from the omFreeList of the moribund thread. | |
| 338 ObjectSynchronizer::omFlush (this) ; | |
| 339 | |
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340 EVENT_THREAD_DESTRUCT(this); |
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341 |
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342 // stack_base can be NULL if the thread is never started or exited before |
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343 // record_stack_base_and_size called. Although, we would like to ensure |
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344 // that all started threads do call record_stack_base_and_size(), there is |
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345 // not proper way to enforce that. |
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346 #if INCLUDE_NMT |
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347 if (_stack_base != NULL) { |
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348 address low_stack_addr = stack_base() - stack_size(); |
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349 MemTracker::release_thread_stack(low_stack_addr, stack_size(), this); |
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350 #ifdef ASSERT |
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351 set_stack_base(NULL); |
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352 #endif |
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353 } |
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354 #endif // INCLUDE_NMT |
| 6197 | 355 |
| 0 | 356 // deallocate data structures |
| 357 delete resource_area(); | |
| 358 // since the handle marks are using the handle area, we have to deallocated the root | |
| 359 // handle mark before deallocating the thread's handle area, | |
| 360 assert(last_handle_mark() != NULL, "check we have an element"); | |
| 10135 | 361 delete last_handle_mark(); |
| 362 assert(last_handle_mark() == NULL, "check we have reached the end"); | |
| 0 | 363 |
| 364 // It's possible we can encounter a null _ParkEvent, etc., in stillborn threads. | |
| 365 // We NULL out the fields for good hygiene. | |
| 366 ParkEvent::Release (_ParkEvent) ; _ParkEvent = NULL ; | |
| 367 ParkEvent::Release (_SleepEvent) ; _SleepEvent = NULL ; | |
| 368 ParkEvent::Release (_MutexEvent) ; _MutexEvent = NULL ; | |
| 369 ParkEvent::Release (_MuxEvent) ; _MuxEvent = NULL ; | |
| 370 | |
| 371 delete handle_area(); | |
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372 delete metadata_handles(); |
| 0 | 373 |
| 374 // osthread() can be NULL, if creation of thread failed. | |
| 375 if (osthread() != NULL) os::free_thread(osthread()); | |
| 376 | |
| 377 delete _SR_lock; | |
| 378 | |
| 379 // clear thread local storage if the Thread is deleting itself | |
| 380 if (this == Thread::current()) { | |
| 381 ThreadLocalStorage::set_thread(NULL); | |
| 382 } else { | |
| 383 // In the case where we're not the current thread, invalidate all the | |
| 384 // caches in case some code tries to get the current thread or the | |
| 385 // thread that was destroyed, and gets stale information. | |
| 386 ThreadLocalStorage::invalidate_all(); | |
| 387 } | |
| 388 CHECK_UNHANDLED_OOPS_ONLY(if (CheckUnhandledOops) delete unhandled_oops();) | |
| 389 } | |
| 390 | |
| 391 // NOTE: dummy function for assertion purpose. | |
| 392 void Thread::run() { | |
| 393 ShouldNotReachHere(); | |
| 394 } | |
| 395 | |
| 396 #ifdef ASSERT | |
| 397 // Private method to check for dangling thread pointer | |
| 398 void check_for_dangling_thread_pointer(Thread *thread) { | |
| 399 assert(!thread->is_Java_thread() || Thread::current() == thread || Threads_lock->owned_by_self(), | |
| 400 "possibility of dangling Thread pointer"); | |
| 401 } | |
| 402 #endif | |
| 403 | |
| 404 | |
| 405 #ifndef PRODUCT | |
| 406 // Tracing method for basic thread operations | |
| 407 void Thread::trace(const char* msg, const Thread* const thread) { | |
| 408 if (!TraceThreadEvents) return; | |
| 409 ResourceMark rm; | |
| 410 ThreadCritical tc; | |
| 411 const char *name = "non-Java thread"; | |
| 412 int prio = -1; | |
| 413 if (thread->is_Java_thread() | |
| 414 && !thread->is_Compiler_thread()) { | |
| 415 // The Threads_lock must be held to get information about | |
| 416 // this thread but may not be in some situations when | |
| 417 // tracing thread events. | |
| 418 bool release_Threads_lock = false; | |
| 419 if (!Threads_lock->owned_by_self()) { | |
| 420 Threads_lock->lock(); | |
| 421 release_Threads_lock = true; | |
| 422 } | |
| 423 JavaThread* jt = (JavaThread *)thread; | |
| 424 name = (char *)jt->get_thread_name(); | |
| 425 oop thread_oop = jt->threadObj(); | |
| 426 if (thread_oop != NULL) { | |
| 427 prio = java_lang_Thread::priority(thread_oop); | |
| 428 } | |
| 429 if (release_Threads_lock) { | |
| 430 Threads_lock->unlock(); | |
| 431 } | |
| 432 } | |
| 433 tty->print_cr("Thread::%s " INTPTR_FORMAT " [%lx] %s (prio: %d)", msg, thread, thread->osthread()->thread_id(), name, prio); | |
| 434 } | |
| 435 #endif | |
| 436 | |
| 437 | |
| 438 ThreadPriority Thread::get_priority(const Thread* const thread) { | |
| 439 trace("get priority", thread); | |
| 440 ThreadPriority priority; | |
| 441 // Can return an error! | |
| 442 (void)os::get_priority(thread, priority); | |
| 443 assert(MinPriority <= priority && priority <= MaxPriority, "non-Java priority found"); | |
| 444 return priority; | |
| 445 } | |
| 446 | |
| 447 void Thread::set_priority(Thread* thread, ThreadPriority priority) { | |
| 448 trace("set priority", thread); | |
| 449 debug_only(check_for_dangling_thread_pointer(thread);) | |
| 450 // Can return an error! | |
| 451 (void)os::set_priority(thread, priority); | |
| 452 } | |
| 453 | |
| 454 | |
| 455 void Thread::start(Thread* thread) { | |
| 456 trace("start", thread); | |
| 457 // Start is different from resume in that its safety is guaranteed by context or | |
| 458 // being called from a Java method synchronized on the Thread object. | |
| 459 if (!DisableStartThread) { | |
| 460 if (thread->is_Java_thread()) { | |
| 461 // Initialize the thread state to RUNNABLE before starting this thread. | |
| 462 // Can not set it after the thread started because we do not know the | |
| 463 // exact thread state at that time. It could be in MONITOR_WAIT or | |
| 464 // in SLEEPING or some other state. | |
| 465 java_lang_Thread::set_thread_status(((JavaThread*)thread)->threadObj(), | |
| 466 java_lang_Thread::RUNNABLE); | |
| 467 } | |
| 468 os::start_thread(thread); | |
| 469 } | |
| 470 } | |
| 471 | |
| 472 // Enqueue a VM_Operation to do the job for us - sometime later | |
| 473 void Thread::send_async_exception(oop java_thread, oop java_throwable) { | |
| 474 VM_ThreadStop* vm_stop = new VM_ThreadStop(java_thread, java_throwable); | |
| 475 VMThread::execute(vm_stop); | |
| 476 } | |
| 477 | |
| 478 | |
| 479 // | |
| 480 // Check if an external suspend request has completed (or has been | |
| 481 // cancelled). Returns true if the thread is externally suspended and | |
| 482 // false otherwise. | |
| 483 // | |
| 484 // The bits parameter returns information about the code path through | |
| 485 // the routine. Useful for debugging: | |
| 486 // | |
| 487 // set in is_ext_suspend_completed(): | |
| 488 // 0x00000001 - routine was entered | |
| 489 // 0x00000010 - routine return false at end | |
| 490 // 0x00000100 - thread exited (return false) | |
| 491 // 0x00000200 - suspend request cancelled (return false) | |
| 492 // 0x00000400 - thread suspended (return true) | |
| 493 // 0x00001000 - thread is in a suspend equivalent state (return true) | |
| 494 // 0x00002000 - thread is native and walkable (return true) | |
| 495 // 0x00004000 - thread is native_trans and walkable (needed retry) | |
| 496 // | |
| 497 // set in wait_for_ext_suspend_completion(): | |
| 498 // 0x00010000 - routine was entered | |
| 499 // 0x00020000 - suspend request cancelled before loop (return false) | |
| 500 // 0x00040000 - thread suspended before loop (return true) | |
| 501 // 0x00080000 - suspend request cancelled in loop (return false) | |
| 502 // 0x00100000 - thread suspended in loop (return true) | |
| 503 // 0x00200000 - suspend not completed during retry loop (return false) | |
| 504 // | |
| 505 | |
| 506 // Helper class for tracing suspend wait debug bits. | |
| 507 // | |
| 508 // 0x00000100 indicates that the target thread exited before it could | |
| 509 // self-suspend which is not a wait failure. 0x00000200, 0x00020000 and | |
| 510 // 0x00080000 each indicate a cancelled suspend request so they don't | |
| 511 // count as wait failures either. | |
| 512 #define DEBUG_FALSE_BITS (0x00000010 | 0x00200000) | |
| 513 | |
| 514 class TraceSuspendDebugBits : public StackObj { | |
| 515 private: | |
| 516 JavaThread * jt; | |
| 517 bool is_wait; | |
| 518 bool called_by_wait; // meaningful when !is_wait | |
| 519 uint32_t * bits; | |
| 520 | |
| 521 public: | |
| 522 TraceSuspendDebugBits(JavaThread *_jt, bool _is_wait, bool _called_by_wait, | |
| 523 uint32_t *_bits) { | |
| 524 jt = _jt; | |
| 525 is_wait = _is_wait; | |
| 526 called_by_wait = _called_by_wait; | |
| 527 bits = _bits; | |
| 528 } | |
| 529 | |
| 530 ~TraceSuspendDebugBits() { | |
| 531 if (!is_wait) { | |
| 532 #if 1 | |
| 533 // By default, don't trace bits for is_ext_suspend_completed() calls. | |
| 534 // That trace is very chatty. | |
| 535 return; | |
| 536 #else | |
| 537 if (!called_by_wait) { | |
| 538 // If tracing for is_ext_suspend_completed() is enabled, then only | |
| 539 // trace calls to it from wait_for_ext_suspend_completion() | |
| 540 return; | |
| 541 } | |
| 542 #endif | |
| 543 } | |
| 544 | |
| 545 if (AssertOnSuspendWaitFailure || TraceSuspendWaitFailures) { | |
| 546 if (bits != NULL && (*bits & DEBUG_FALSE_BITS) != 0) { | |
| 547 MutexLocker ml(Threads_lock); // needed for get_thread_name() | |
| 548 ResourceMark rm; | |
| 549 | |
| 550 tty->print_cr( | |
| 551 "Failed wait_for_ext_suspend_completion(thread=%s, debug_bits=%x)", | |
| 552 jt->get_thread_name(), *bits); | |
| 553 | |
| 554 guarantee(!AssertOnSuspendWaitFailure, "external suspend wait failed"); | |
| 555 } | |
| 556 } | |
| 557 } | |
| 558 }; | |
| 559 #undef DEBUG_FALSE_BITS | |
| 560 | |
| 561 | |
| 562 bool JavaThread::is_ext_suspend_completed(bool called_by_wait, int delay, uint32_t *bits) { | |
| 563 TraceSuspendDebugBits tsdb(this, false /* !is_wait */, called_by_wait, bits); | |
| 564 | |
| 565 bool did_trans_retry = false; // only do thread_in_native_trans retry once | |
| 566 bool do_trans_retry; // flag to force the retry | |
| 567 | |
| 568 *bits |= 0x00000001; | |
| 569 | |
| 570 do { | |
| 571 do_trans_retry = false; | |
| 572 | |
| 573 if (is_exiting()) { | |
| 574 // Thread is in the process of exiting. This is always checked | |
| 575 // first to reduce the risk of dereferencing a freed JavaThread. | |
| 576 *bits |= 0x00000100; | |
| 577 return false; | |
| 578 } | |
| 579 | |
| 580 if (!is_external_suspend()) { | |
| 581 // Suspend request is cancelled. This is always checked before | |
| 582 // is_ext_suspended() to reduce the risk of a rogue resume | |
| 583 // confusing the thread that made the suspend request. | |
| 584 *bits |= 0x00000200; | |
| 585 return false; | |
| 586 } | |
| 587 | |
| 588 if (is_ext_suspended()) { | |
| 589 // thread is suspended | |
| 590 *bits |= 0x00000400; | |
| 591 return true; | |
| 592 } | |
| 593 | |
| 594 // Now that we no longer do hard suspends of threads running | |
| 595 // native code, the target thread can be changing thread state | |
| 596 // while we are in this routine: | |
| 597 // | |
| 598 // _thread_in_native -> _thread_in_native_trans -> _thread_blocked | |
| 599 // | |
| 600 // We save a copy of the thread state as observed at this moment | |
| 601 // and make our decision about suspend completeness based on the | |
| 602 // copy. This closes the race where the thread state is seen as | |
| 603 // _thread_in_native_trans in the if-thread_blocked check, but is | |
| 604 // seen as _thread_blocked in if-thread_in_native_trans check. | |
| 605 JavaThreadState save_state = thread_state(); | |
| 606 | |
| 607 if (save_state == _thread_blocked && is_suspend_equivalent()) { | |
| 608 // If the thread's state is _thread_blocked and this blocking | |
| 609 // condition is known to be equivalent to a suspend, then we can | |
| 610 // consider the thread to be externally suspended. This means that | |
| 611 // the code that sets _thread_blocked has been modified to do | |
| 612 // self-suspension if the blocking condition releases. We also | |
| 613 // used to check for CONDVAR_WAIT here, but that is now covered by | |
| 614 // the _thread_blocked with self-suspension check. | |
| 615 // | |
| 616 // Return true since we wouldn't be here unless there was still an | |
| 617 // external suspend request. | |
| 618 *bits |= 0x00001000; | |
| 619 return true; | |
| 620 } else if (save_state == _thread_in_native && frame_anchor()->walkable()) { | |
| 621 // Threads running native code will self-suspend on native==>VM/Java | |
| 622 // transitions. If its stack is walkable (should always be the case | |
| 623 // unless this function is called before the actual java_suspend() | |
| 624 // call), then the wait is done. | |
| 625 *bits |= 0x00002000; | |
| 626 return true; | |
| 627 } else if (!called_by_wait && !did_trans_retry && | |
| 628 save_state == _thread_in_native_trans && | |
| 629 frame_anchor()->walkable()) { | |
| 630 // The thread is transitioning from thread_in_native to another | |
| 631 // thread state. check_safepoint_and_suspend_for_native_trans() | |
| 632 // will force the thread to self-suspend. If it hasn't gotten | |
| 633 // there yet we may have caught the thread in-between the native | |
| 634 // code check above and the self-suspend. Lucky us. If we were | |
| 635 // called by wait_for_ext_suspend_completion(), then it | |
| 636 // will be doing the retries so we don't have to. | |
| 637 // | |
| 638 // Since we use the saved thread state in the if-statement above, | |
| 639 // there is a chance that the thread has already transitioned to | |
| 640 // _thread_blocked by the time we get here. In that case, we will | |
| 641 // make a single unnecessary pass through the logic below. This | |
| 642 // doesn't hurt anything since we still do the trans retry. | |
| 643 | |
| 644 *bits |= 0x00004000; | |
| 645 | |
| 646 // Once the thread leaves thread_in_native_trans for another | |
| 647 // thread state, we break out of this retry loop. We shouldn't | |
| 648 // need this flag to prevent us from getting back here, but | |
| 649 // sometimes paranoia is good. | |
| 650 did_trans_retry = true; | |
| 651 | |
| 652 // We wait for the thread to transition to a more usable state. | |
| 653 for (int i = 1; i <= SuspendRetryCount; i++) { | |
| 654 // We used to do an "os::yield_all(i)" call here with the intention | |
| 655 // that yielding would increase on each retry. However, the parameter | |
| 656 // is ignored on Linux which means the yield didn't scale up. Waiting | |
| 657 // on the SR_lock below provides a much more predictable scale up for | |
| 658 // the delay. It also provides a simple/direct point to check for any | |
| 659 // safepoint requests from the VMThread | |
| 660 | |
| 661 // temporarily drops SR_lock while doing wait with safepoint check | |
| 662 // (if we're a JavaThread - the WatcherThread can also call this) | |
| 663 // and increase delay with each retry | |
| 664 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
| 665 | |
| 666 // check the actual thread state instead of what we saved above | |
| 667 if (thread_state() != _thread_in_native_trans) { | |
| 668 // the thread has transitioned to another thread state so | |
| 669 // try all the checks (except this one) one more time. | |
| 670 do_trans_retry = true; | |
| 671 break; | |
| 672 } | |
| 673 } // end retry loop | |
| 674 | |
| 675 | |
| 676 } | |
| 677 } while (do_trans_retry); | |
| 678 | |
| 679 *bits |= 0x00000010; | |
| 680 return false; | |
| 681 } | |
| 682 | |
| 683 // | |
| 684 // Wait for an external suspend request to complete (or be cancelled). | |
| 685 // Returns true if the thread is externally suspended and false otherwise. | |
| 686 // | |
| 687 bool JavaThread::wait_for_ext_suspend_completion(int retries, int delay, | |
| 688 uint32_t *bits) { | |
| 689 TraceSuspendDebugBits tsdb(this, true /* is_wait */, | |
| 690 false /* !called_by_wait */, bits); | |
| 691 | |
| 692 // local flag copies to minimize SR_lock hold time | |
| 693 bool is_suspended; | |
| 694 bool pending; | |
| 695 uint32_t reset_bits; | |
| 696 | |
| 697 // set a marker so is_ext_suspend_completed() knows we are the caller | |
| 698 *bits |= 0x00010000; | |
| 699 | |
| 700 // We use reset_bits to reinitialize the bits value at the top of | |
| 701 // each retry loop. This allows the caller to make use of any | |
| 702 // unused bits for their own marking purposes. | |
| 703 reset_bits = *bits; | |
| 704 | |
| 705 { | |
| 706 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 707 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
| 708 delay, bits); | |
| 709 pending = is_external_suspend(); | |
| 710 } | |
| 711 // must release SR_lock to allow suspension to complete | |
| 712 | |
| 713 if (!pending) { | |
| 714 // A cancelled suspend request is the only false return from | |
| 715 // is_ext_suspend_completed() that keeps us from entering the | |
| 716 // retry loop. | |
| 717 *bits |= 0x00020000; | |
| 718 return false; | |
| 719 } | |
| 720 | |
| 721 if (is_suspended) { | |
| 722 *bits |= 0x00040000; | |
| 723 return true; | |
| 724 } | |
| 725 | |
| 726 for (int i = 1; i <= retries; i++) { | |
| 727 *bits = reset_bits; // reinit to only track last retry | |
| 728 | |
| 729 // We used to do an "os::yield_all(i)" call here with the intention | |
| 730 // that yielding would increase on each retry. However, the parameter | |
| 731 // is ignored on Linux which means the yield didn't scale up. Waiting | |
| 732 // on the SR_lock below provides a much more predictable scale up for | |
| 733 // the delay. It also provides a simple/direct point to check for any | |
| 734 // safepoint requests from the VMThread | |
| 735 | |
| 736 { | |
| 737 MutexLocker ml(SR_lock()); | |
| 738 // wait with safepoint check (if we're a JavaThread - the WatcherThread | |
| 739 // can also call this) and increase delay with each retry | |
| 740 SR_lock()->wait(!Thread::current()->is_Java_thread(), i * delay); | |
| 741 | |
| 742 is_suspended = is_ext_suspend_completed(true /* called_by_wait */, | |
| 743 delay, bits); | |
| 744 | |
| 745 // It is possible for the external suspend request to be cancelled | |
| 746 // (by a resume) before the actual suspend operation is completed. | |
| 747 // Refresh our local copy to see if we still need to wait. | |
| 748 pending = is_external_suspend(); | |
| 749 } | |
| 750 | |
| 751 if (!pending) { | |
| 752 // A cancelled suspend request is the only false return from | |
| 753 // is_ext_suspend_completed() that keeps us from staying in the | |
| 754 // retry loop. | |
| 755 *bits |= 0x00080000; | |
| 756 return false; | |
| 757 } | |
| 758 | |
| 759 if (is_suspended) { | |
| 760 *bits |= 0x00100000; | |
| 761 return true; | |
| 762 } | |
| 763 } // end retry loop | |
| 764 | |
| 765 // thread did not suspend after all our retries | |
| 766 *bits |= 0x00200000; | |
| 767 return false; | |
| 768 } | |
| 769 | |
| 770 #ifndef PRODUCT | |
| 771 void JavaThread::record_jump(address target, address instr, const char* file, int line) { | |
| 772 | |
| 773 // This should not need to be atomic as the only way for simultaneous | |
| 774 // updates is via interrupts. Even then this should be rare or non-existant | |
| 775 // and we don't care that much anyway. | |
| 776 | |
| 777 int index = _jmp_ring_index; | |
| 778 _jmp_ring_index = (index + 1 ) & (jump_ring_buffer_size - 1); | |
| 779 _jmp_ring[index]._target = (intptr_t) target; | |
| 780 _jmp_ring[index]._instruction = (intptr_t) instr; | |
| 781 _jmp_ring[index]._file = file; | |
| 782 _jmp_ring[index]._line = line; | |
| 783 } | |
| 784 #endif /* PRODUCT */ | |
| 785 | |
| 786 // Called by flat profiler | |
| 787 // Callers have already called wait_for_ext_suspend_completion | |
| 788 // The assertion for that is currently too complex to put here: | |
| 789 bool JavaThread::profile_last_Java_frame(frame* _fr) { | |
| 790 bool gotframe = false; | |
| 791 // self suspension saves needed state. | |
| 792 if (has_last_Java_frame() && _anchor.walkable()) { | |
| 793 *_fr = pd_last_frame(); | |
| 794 gotframe = true; | |
| 795 } | |
| 796 return gotframe; | |
| 797 } | |
| 798 | |
| 799 void Thread::interrupt(Thread* thread) { | |
| 800 trace("interrupt", thread); | |
| 801 debug_only(check_for_dangling_thread_pointer(thread);) | |
| 802 os::interrupt(thread); | |
| 803 } | |
| 804 | |
| 805 bool Thread::is_interrupted(Thread* thread, bool clear_interrupted) { | |
| 806 trace("is_interrupted", thread); | |
| 807 debug_only(check_for_dangling_thread_pointer(thread);) | |
| 808 // Note: If clear_interrupted==false, this simply fetches and | |
| 809 // returns the value of the field osthread()->interrupted(). | |
| 810 return os::is_interrupted(thread, clear_interrupted); | |
| 811 } | |
| 812 | |
| 813 | |
| 814 // GC Support | |
| 815 bool Thread::claim_oops_do_par_case(int strong_roots_parity) { | |
| 816 jint thread_parity = _oops_do_parity; | |
| 817 if (thread_parity != strong_roots_parity) { | |
| 818 jint res = Atomic::cmpxchg(strong_roots_parity, &_oops_do_parity, thread_parity); | |
|
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819 if (res == thread_parity) { |
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820 return true; |
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821 } else { |
| 0 | 822 guarantee(res == strong_roots_parity, "Or else what?"); |
|
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823 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
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824 "Should only fail when parallel."); |
| 0 | 825 return false; |
| 826 } | |
| 827 } | |
|
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828 assert(SharedHeap::heap()->workers()->active_workers() > 0, |
| 0 | 829 "Should only fail when parallel."); |
| 830 return false; | |
| 831 } | |
| 832 | |
|
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833 void Thread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
| 0 | 834 active_handles()->oops_do(f); |
| 835 // Do oop for ThreadShadow | |
| 836 f->do_oop((oop*)&_pending_exception); | |
| 837 handle_area()->oops_do(f); | |
| 838 } | |
| 839 | |
|
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840 void Thread::nmethods_do(CodeBlobClosure* cf) { |
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841 // no nmethods in a generic thread... |
| 0 | 842 } |
| 843 | |
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844 void Thread::metadata_do(void f(Metadata*)) { |
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845 if (metadata_handles() != NULL) { |
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846 for (int i = 0; i< metadata_handles()->length(); i++) { |
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847 f(metadata_handles()->at(i)); |
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848 } |
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849 } |
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850 } |
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851 |
| 0 | 852 void Thread::print_on(outputStream* st) const { |
| 853 // get_priority assumes osthread initialized | |
| 854 if (osthread() != NULL) { | |
| 6766 | 855 int os_prio; |
| 856 if (os::get_native_priority(this, &os_prio) == OS_OK) { | |
| 857 st->print("os_prio=%d ", os_prio); | |
| 858 } | |
| 859 st->print("tid=" INTPTR_FORMAT " ", this); | |
| 0 | 860 osthread()->print_on(st); |
| 861 } | |
| 862 debug_only(if (WizardMode) print_owned_locks_on(st);) | |
| 863 } | |
| 864 | |
| 865 // Thread::print_on_error() is called by fatal error handler. Don't use | |
| 866 // any lock or allocate memory. | |
| 867 void Thread::print_on_error(outputStream* st, char* buf, int buflen) const { | |
| 868 if (is_VM_thread()) st->print("VMThread"); | |
| 869 else if (is_Compiler_thread()) st->print("CompilerThread"); | |
| 870 else if (is_Java_thread()) st->print("JavaThread"); | |
| 871 else if (is_GC_task_thread()) st->print("GCTaskThread"); | |
| 872 else if (is_Watcher_thread()) st->print("WatcherThread"); | |
| 873 else if (is_ConcurrentGC_thread()) st->print("ConcurrentGCThread"); | |
| 874 else st->print("Thread"); | |
| 875 | |
| 876 st->print(" [stack: " PTR_FORMAT "," PTR_FORMAT "]", | |
| 877 _stack_base - _stack_size, _stack_base); | |
| 878 | |
| 879 if (osthread()) { | |
| 880 st->print(" [id=%d]", osthread()->thread_id()); | |
| 881 } | |
| 882 } | |
| 883 | |
| 884 #ifdef ASSERT | |
| 885 void Thread::print_owned_locks_on(outputStream* st) const { | |
| 886 Monitor *cur = _owned_locks; | |
| 887 if (cur == NULL) { | |
| 888 st->print(" (no locks) "); | |
| 889 } else { | |
| 890 st->print_cr(" Locks owned:"); | |
| 891 while(cur) { | |
| 892 cur->print_on(st); | |
| 893 cur = cur->next(); | |
| 894 } | |
| 895 } | |
| 896 } | |
| 897 | |
| 898 static int ref_use_count = 0; | |
| 899 | |
| 900 bool Thread::owns_locks_but_compiled_lock() const { | |
| 901 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
| 902 if (cur != Compile_lock) return true; | |
| 903 } | |
| 904 return false; | |
| 905 } | |
| 906 | |
| 907 | |
| 908 #endif | |
| 909 | |
| 910 #ifndef PRODUCT | |
| 911 | |
| 912 // The flag: potential_vm_operation notifies if this particular safepoint state could potential | |
| 913 // invoke the vm-thread (i.e., and oop allocation). In that case, we also have to make sure that | |
| 914 // no threads which allow_vm_block's are held | |
| 915 void Thread::check_for_valid_safepoint_state(bool potential_vm_operation) { | |
| 916 // Check if current thread is allowed to block at a safepoint | |
| 917 if (!(_allow_safepoint_count == 0)) | |
| 918 fatal("Possible safepoint reached by thread that does not allow it"); | |
| 919 if (is_Java_thread() && ((JavaThread*)this)->thread_state() != _thread_in_vm) { | |
| 920 fatal("LEAF method calling lock?"); | |
| 921 } | |
| 922 | |
| 923 #ifdef ASSERT | |
| 924 if (potential_vm_operation && is_Java_thread() | |
| 925 && !Universe::is_bootstrapping()) { | |
| 926 // Make sure we do not hold any locks that the VM thread also uses. | |
| 927 // This could potentially lead to deadlocks | |
| 928 for(Monitor *cur = _owned_locks; cur; cur = cur->next()) { | |
| 929 // Threads_lock is special, since the safepoint synchronization will not start before this is | |
| 930 // acquired. Hence, a JavaThread cannot be holding it at a safepoint. So is VMOperationRequest_lock, | |
| 931 // since it is used to transfer control between JavaThreads and the VMThread | |
| 932 // Do not *exclude* any locks unless you are absolutly sure it is correct. Ask someone else first! | |
| 933 if ( (cur->allow_vm_block() && | |
| 934 cur != Threads_lock && | |
| 935 cur != Compile_lock && // Temporary: should not be necessary when we get spearate compilation | |
| 936 cur != VMOperationRequest_lock && | |
| 937 cur != VMOperationQueue_lock) || | |
| 938 cur->rank() == Mutex::special) { | |
| 939 warning("Thread holding lock at safepoint that vm can block on: %s", cur->name()); | |
| 940 } | |
| 941 } | |
| 942 } | |
| 943 | |
| 944 if (GCALotAtAllSafepoints) { | |
| 945 // We could enter a safepoint here and thus have a gc | |
| 946 InterfaceSupport::check_gc_alot(); | |
| 947 } | |
| 948 #endif | |
| 949 } | |
| 950 #endif | |
| 951 | |
| 952 bool Thread::is_in_stack(address adr) const { | |
| 953 assert(Thread::current() == this, "is_in_stack can only be called from current thread"); | |
| 954 address end = os::current_stack_pointer(); | |
|
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955 // Allow non Java threads to call this without stack_base |
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956 if (_stack_base == NULL) return true; |
| 0 | 957 if (stack_base() >= adr && adr >= end) return true; |
| 958 | |
| 959 return false; | |
| 960 } | |
| 961 | |
| 962 | |
|
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963 bool Thread::is_in_usable_stack(address adr) const { |
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964 size_t stack_guard_size = os::uses_stack_guard_pages() ? (StackYellowPages + StackRedPages) * os::vm_page_size() : 0; |
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965 size_t usable_stack_size = _stack_size - stack_guard_size; |
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966 |
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967 return ((adr < stack_base()) && (adr >= stack_base() - usable_stack_size)); |
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968 } |
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969 |
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970 |
| 0 | 971 // We had to move these methods here, because vm threads get into ObjectSynchronizer::enter |
| 972 // However, there is a note in JavaThread::is_lock_owned() about the VM threads not being | |
| 973 // used for compilation in the future. If that change is made, the need for these methods | |
| 974 // should be revisited, and they should be removed if possible. | |
| 975 | |
| 976 bool Thread::is_lock_owned(address adr) const { | |
|
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977 return on_local_stack(adr); |
| 0 | 978 } |
| 979 | |
| 980 bool Thread::set_as_starting_thread() { | |
| 981 // NOTE: this must be called inside the main thread. | |
| 982 return os::create_main_thread((JavaThread*)this); | |
| 983 } | |
| 984 | |
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985 static void initialize_class(Symbol* class_name, TRAPS) { |
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986 Klass* klass = SystemDictionary::resolve_or_fail(class_name, true, CHECK); |
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987 InstanceKlass::cast(klass)->initialize(CHECK); |
| 0 | 988 } |
| 989 | |
| 990 | |
| 991 // Creates the initial ThreadGroup | |
| 992 static Handle create_initial_thread_group(TRAPS) { | |
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993 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_ThreadGroup(), true, CHECK_NH); |
| 0 | 994 instanceKlassHandle klass (THREAD, k); |
| 995 | |
| 996 Handle system_instance = klass->allocate_instance_handle(CHECK_NH); | |
| 997 { | |
| 998 JavaValue result(T_VOID); | |
| 999 JavaCalls::call_special(&result, | |
| 1000 system_instance, | |
| 1001 klass, | |
|
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1002 vmSymbols::object_initializer_name(), |
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1003 vmSymbols::void_method_signature(), |
| 0 | 1004 CHECK_NH); |
| 1005 } | |
| 1006 Universe::set_system_thread_group(system_instance()); | |
| 1007 | |
| 1008 Handle main_instance = klass->allocate_instance_handle(CHECK_NH); | |
| 1009 { | |
| 1010 JavaValue result(T_VOID); | |
| 1011 Handle string = java_lang_String::create_from_str("main", CHECK_NH); | |
| 1012 JavaCalls::call_special(&result, | |
| 1013 main_instance, | |
| 1014 klass, | |
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1015 vmSymbols::object_initializer_name(), |
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1016 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 1017 system_instance, |
| 1018 string, | |
| 1019 CHECK_NH); | |
| 1020 } | |
| 1021 return main_instance; | |
| 1022 } | |
| 1023 | |
| 1024 // Creates the initial Thread | |
| 1025 static oop create_initial_thread(Handle thread_group, JavaThread* thread, TRAPS) { | |
|
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1026 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_NULL); |
| 0 | 1027 instanceKlassHandle klass (THREAD, k); |
| 1028 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_NULL); | |
| 1029 | |
| 1030 java_lang_Thread::set_thread(thread_oop(), thread); | |
| 1031 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
| 1032 thread->set_threadObj(thread_oop()); | |
| 1033 | |
| 1034 Handle string = java_lang_String::create_from_str("main", CHECK_NULL); | |
| 1035 | |
| 1036 JavaValue result(T_VOID); | |
| 1037 JavaCalls::call_special(&result, thread_oop, | |
| 1038 klass, | |
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1039 vmSymbols::object_initializer_name(), |
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1040 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 1041 thread_group, |
| 1042 string, | |
| 1043 CHECK_NULL); | |
| 1044 return thread_oop(); | |
| 1045 } | |
| 1046 | |
| 1047 static void call_initializeSystemClass(TRAPS) { | |
|
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1048 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
| 0 | 1049 instanceKlassHandle klass (THREAD, k); |
| 1050 | |
| 1051 JavaValue result(T_VOID); | |
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1052 JavaCalls::call_static(&result, klass, vmSymbols::initializeSystemClass_name(), |
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1053 vmSymbols::void_method_signature(), CHECK); |
| 0 | 1054 } |
| 1055 | |
| 6181 | 1056 char java_runtime_name[128] = ""; |
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1057 char java_runtime_version[128] = ""; |
| 6181 | 1058 |
| 1059 // extract the JRE name from sun.misc.Version.java_runtime_name | |
| 1060 static const char* get_java_runtime_name(TRAPS) { | |
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1061 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
| 6181 | 1062 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
| 1063 fieldDescriptor fd; | |
| 1064 bool found = k != NULL && | |
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1065 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_name_name(), |
| 6181 | 1066 vmSymbols::string_signature(), &fd); |
| 1067 if (found) { | |
| 1068 oop name_oop = k->java_mirror()->obj_field(fd.offset()); | |
| 1069 if (name_oop == NULL) | |
| 1070 return NULL; | |
| 1071 const char* name = java_lang_String::as_utf8_string(name_oop, | |
| 1072 java_runtime_name, | |
| 1073 sizeof(java_runtime_name)); | |
| 1074 return name; | |
| 1075 } else { | |
| 1076 return NULL; | |
| 1077 } | |
| 1078 } | |
| 1079 | |
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1080 // extract the JRE version from sun.misc.Version.java_runtime_version |
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1081 static const char* get_java_runtime_version(TRAPS) { |
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1082 Klass* k = SystemDictionary::find(vmSymbols::sun_misc_Version(), |
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1083 Handle(), Handle(), CHECK_AND_CLEAR_NULL); |
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1084 fieldDescriptor fd; |
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1085 bool found = k != NULL && |
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1086 InstanceKlass::cast(k)->find_local_field(vmSymbols::java_runtime_version_name(), |
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1087 vmSymbols::string_signature(), &fd); |
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1088 if (found) { |
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1089 oop name_oop = k->java_mirror()->obj_field(fd.offset()); |
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1090 if (name_oop == NULL) |
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1091 return NULL; |
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1092 const char* name = java_lang_String::as_utf8_string(name_oop, |
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1093 java_runtime_version, |
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1094 sizeof(java_runtime_version)); |
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1095 return name; |
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1096 } else { |
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1097 return NULL; |
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1098 } |
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1099 } |
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1100 |
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1101 // General purpose hook into Java code, run once when the VM is initialized. |
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1102 // The Java library method itself may be changed independently from the VM. |
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1103 static void call_postVMInitHook(TRAPS) { |
|
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1104 Klass* k = SystemDictionary::resolve_or_null(vmSymbols::sun_misc_PostVMInitHook(), THREAD); |
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1105 instanceKlassHandle klass (THREAD, k); |
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1106 if (klass.not_null()) { |
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1107 JavaValue result(T_VOID); |
|
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1108 JavaCalls::call_static(&result, klass, vmSymbols::run_method_name(), |
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1109 vmSymbols::void_method_signature(), |
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1110 CHECK); |
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1111 } |
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1112 } |
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1113 |
| 0 | 1114 static void reset_vm_info_property(TRAPS) { |
| 1115 // the vm info string | |
| 1116 ResourceMark rm(THREAD); | |
| 1117 const char *vm_info = VM_Version::vm_info_string(); | |
| 1118 | |
| 1119 // java.lang.System class | |
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1120 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_System(), true, CHECK); |
| 0 | 1121 instanceKlassHandle klass (THREAD, k); |
| 1122 | |
| 1123 // setProperty arguments | |
| 1124 Handle key_str = java_lang_String::create_from_str("java.vm.info", CHECK); | |
| 1125 Handle value_str = java_lang_String::create_from_str(vm_info, CHECK); | |
| 1126 | |
| 1127 // return value | |
| 1128 JavaValue r(T_OBJECT); | |
| 1129 | |
| 1130 // public static String setProperty(String key, String value); | |
| 1131 JavaCalls::call_static(&r, | |
| 1132 klass, | |
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1133 vmSymbols::setProperty_name(), |
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1134 vmSymbols::string_string_string_signature(), |
| 0 | 1135 key_str, |
| 1136 value_str, | |
| 1137 CHECK); | |
| 1138 } | |
| 1139 | |
| 1140 | |
| 1141 void JavaThread::allocate_threadObj(Handle thread_group, char* thread_name, bool daemon, TRAPS) { | |
| 1142 assert(thread_group.not_null(), "thread group should be specified"); | |
| 1143 assert(threadObj() == NULL, "should only create Java thread object once"); | |
| 1144 | |
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1145 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK); |
| 0 | 1146 instanceKlassHandle klass (THREAD, k); |
| 1147 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK); | |
| 1148 | |
| 1149 java_lang_Thread::set_thread(thread_oop(), this); | |
| 1150 java_lang_Thread::set_priority(thread_oop(), NormPriority); | |
| 1151 set_threadObj(thread_oop()); | |
| 1152 | |
| 1153 JavaValue result(T_VOID); | |
| 1154 if (thread_name != NULL) { | |
| 1155 Handle name = java_lang_String::create_from_str(thread_name, CHECK); | |
| 1156 // Thread gets assigned specified name and null target | |
| 1157 JavaCalls::call_special(&result, | |
| 1158 thread_oop, | |
| 1159 klass, | |
|
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1160 vmSymbols::object_initializer_name(), |
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1161 vmSymbols::threadgroup_string_void_signature(), |
| 0 | 1162 thread_group, // Argument 1 |
| 1163 name, // Argument 2 | |
| 1164 THREAD); | |
| 1165 } else { | |
| 1166 // Thread gets assigned name "Thread-nnn" and null target | |
| 1167 // (java.lang.Thread doesn't have a constructor taking only a ThreadGroup argument) | |
| 1168 JavaCalls::call_special(&result, | |
| 1169 thread_oop, | |
| 1170 klass, | |
|
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1171 vmSymbols::object_initializer_name(), |
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1172 vmSymbols::threadgroup_runnable_void_signature(), |
| 0 | 1173 thread_group, // Argument 1 |
| 1174 Handle(), // Argument 2 | |
| 1175 THREAD); | |
| 1176 } | |
| 1177 | |
| 1178 | |
| 1179 if (daemon) { | |
| 1180 java_lang_Thread::set_daemon(thread_oop()); | |
| 1181 } | |
| 1182 | |
| 1183 if (HAS_PENDING_EXCEPTION) { | |
| 1184 return; | |
| 1185 } | |
| 1186 | |
| 1142 | 1187 KlassHandle group(this, SystemDictionary::ThreadGroup_klass()); |
| 0 | 1188 Handle threadObj(this, this->threadObj()); |
| 1189 | |
| 1190 JavaCalls::call_special(&result, | |
| 1191 thread_group, | |
| 1192 group, | |
|
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1193 vmSymbols::add_method_name(), |
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1194 vmSymbols::thread_void_signature(), |
| 0 | 1195 threadObj, // Arg 1 |
| 1196 THREAD); | |
| 1197 | |
| 1198 | |
| 1199 } | |
| 1200 | |
| 1201 // NamedThread -- non-JavaThread subclasses with multiple | |
| 1202 // uniquely named instances should derive from this. | |
| 1203 NamedThread::NamedThread() : Thread() { | |
| 1204 _name = NULL; | |
|
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1205 _processed_thread = NULL; |
| 0 | 1206 } |
| 1207 | |
| 1208 NamedThread::~NamedThread() { | |
| 1209 if (_name != NULL) { | |
| 6197 | 1210 FREE_C_HEAP_ARRAY(char, _name, mtThread); |
| 0 | 1211 _name = NULL; |
| 1212 } | |
| 1213 } | |
| 1214 | |
| 1215 void NamedThread::set_name(const char* format, ...) { | |
| 1216 guarantee(_name == NULL, "Only get to set name once."); | |
| 6197 | 1217 _name = NEW_C_HEAP_ARRAY(char, max_name_len, mtThread); |
| 0 | 1218 guarantee(_name != NULL, "alloc failure"); |
| 1219 va_list ap; | |
| 1220 va_start(ap, format); | |
| 1221 jio_vsnprintf(_name, max_name_len, format, ap); | |
| 1222 va_end(ap); | |
| 1223 } | |
| 1224 | |
| 1225 // ======= WatcherThread ======== | |
| 1226 | |
| 1227 // The watcher thread exists to simulate timer interrupts. It should | |
| 1228 // be replaced by an abstraction over whatever native support for | |
| 1229 // timer interrupts exists on the platform. | |
| 1230 | |
| 1231 WatcherThread* WatcherThread::_watcher_thread = NULL; | |
|
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1232 bool WatcherThread::_startable = false; |
|
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1233 volatile bool WatcherThread::_should_terminate = false; |
| 0 | 1234 |
| 11151 | 1235 WatcherThread::WatcherThread() : Thread(), _crash_protection(NULL) { |
| 0 | 1236 assert(watcher_thread() == NULL, "we can only allocate one WatcherThread"); |
| 1237 if (os::create_thread(this, os::watcher_thread)) { | |
| 1238 _watcher_thread = this; | |
| 1239 | |
| 1240 // Set the watcher thread to the highest OS priority which should not be | |
| 1241 // used, unless a Java thread with priority java.lang.Thread.MAX_PRIORITY | |
| 1242 // is created. The only normal thread using this priority is the reference | |
| 1243 // handler thread, which runs for very short intervals only. | |
| 1244 // If the VMThread's priority is not lower than the WatcherThread profiling | |
| 1245 // will be inaccurate. | |
| 1246 os::set_priority(this, MaxPriority); | |
| 1247 if (!DisableStartThread) { | |
| 1248 os::start_thread(this); | |
| 1249 } | |
| 1250 } | |
| 1251 } | |
| 1252 | |
|
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1253 int WatcherThread::sleep() const { |
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1254 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1255 |
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1256 // remaining will be zero if there are no tasks, |
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1257 // causing the WatcherThread to sleep until a task is |
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1258 // enrolled |
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1259 int remaining = PeriodicTask::time_to_wait(); |
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1260 int time_slept = 0; |
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1261 |
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1262 // we expect this to timeout - we only ever get unparked when |
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1263 // we should terminate or when a new task has been enrolled |
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1264 OSThreadWaitState osts(this->osthread(), false /* not Object.wait() */); |
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1265 |
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1266 jlong time_before_loop = os::javaTimeNanos(); |
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1267 |
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1268 for (;;) { |
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1269 bool timedout = PeriodicTask_lock->wait(Mutex::_no_safepoint_check_flag, remaining); |
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1270 jlong now = os::javaTimeNanos(); |
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1271 |
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1272 if (remaining == 0) { |
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1273 // if we didn't have any tasks we could have waited for a long time |
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1274 // consider the time_slept zero and reset time_before_loop |
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1275 time_slept = 0; |
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1276 time_before_loop = now; |
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1277 } else { |
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1278 // need to recalulate since we might have new tasks in _tasks |
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1279 time_slept = (int) ((now - time_before_loop) / 1000000); |
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1280 } |
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1281 |
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1282 // Change to task list or spurious wakeup of some kind |
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1283 if (timedout || _should_terminate) { |
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1284 break; |
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1285 } |
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1286 |
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1287 remaining = PeriodicTask::time_to_wait(); |
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1288 if (remaining == 0) { |
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1289 // Last task was just disenrolled so loop around and wait until |
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1290 // another task gets enrolled |
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1291 continue; |
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1292 } |
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1293 |
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1294 remaining -= time_slept; |
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1295 if (remaining <= 0) |
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1296 break; |
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1297 } |
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1298 |
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1299 return time_slept; |
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1300 } |
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1301 |
| 0 | 1302 void WatcherThread::run() { |
| 1303 assert(this == watcher_thread(), "just checking"); | |
| 1304 | |
| 1305 this->record_stack_base_and_size(); | |
| 1306 this->initialize_thread_local_storage(); | |
| 1307 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 1308 while(!_should_terminate) { | |
| 1309 assert(watcher_thread() == Thread::current(), "thread consistency check"); | |
| 1310 assert(watcher_thread() == this, "thread consistency check"); | |
| 1311 | |
| 1312 // Calculate how long it'll be until the next PeriodicTask work | |
| 1313 // should be done, and sleep that amount of time. | |
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1314 int time_waited = sleep(); |
| 0 | 1315 |
| 1316 if (is_error_reported()) { | |
| 1317 // A fatal error has happened, the error handler(VMError::report_and_die) | |
| 1318 // should abort JVM after creating an error log file. However in some | |
| 1319 // rare cases, the error handler itself might deadlock. Here we try to | |
| 1320 // kill JVM if the fatal error handler fails to abort in 2 minutes. | |
| 1321 // | |
| 1322 // This code is in WatcherThread because WatcherThread wakes up | |
| 1323 // periodically so the fatal error handler doesn't need to do anything; | |
| 1324 // also because the WatcherThread is less likely to crash than other | |
| 1325 // threads. | |
| 1326 | |
| 1327 for (;;) { | |
| 1328 if (!ShowMessageBoxOnError | |
| 1329 && (OnError == NULL || OnError[0] == '\0') | |
| 1330 && Arguments::abort_hook() == NULL) { | |
| 1331 os::sleep(this, 2 * 60 * 1000, false); | |
| 1332 fdStream err(defaultStream::output_fd()); | |
| 1333 err.print_raw_cr("# [ timer expired, abort... ]"); | |
| 1334 // skip atexit/vm_exit/vm_abort hooks | |
| 1335 os::die(); | |
| 1336 } | |
| 1337 | |
| 1338 // Wake up 5 seconds later, the fatal handler may reset OnError or | |
| 1339 // ShowMessageBoxOnError when it is ready to abort. | |
| 1340 os::sleep(this, 5 * 1000, false); | |
| 1341 } | |
| 1342 } | |
| 1343 | |
|
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1344 PeriodicTask::real_time_tick(time_waited); |
| 0 | 1345 } |
| 1346 | |
| 1347 // Signal that it is terminated | |
| 1348 { | |
| 1349 MutexLockerEx mu(Terminator_lock, Mutex::_no_safepoint_check_flag); | |
| 1350 _watcher_thread = NULL; | |
| 1351 Terminator_lock->notify(); | |
| 1352 } | |
| 1353 | |
| 1354 // Thread destructor usually does this.. | |
| 1355 ThreadLocalStorage::set_thread(NULL); | |
| 1356 } | |
| 1357 | |
| 1358 void WatcherThread::start() { | |
|
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1359 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1360 |
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1361 if (watcher_thread() == NULL && _startable) { |
| 0 | 1362 _should_terminate = false; |
| 1363 // Create the single instance of WatcherThread | |
| 1364 new WatcherThread(); | |
| 1365 } | |
| 1366 } | |
| 1367 | |
|
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1368 void WatcherThread::make_startable() { |
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1369 assert(PeriodicTask_lock->owned_by_self(), "PeriodicTask_lock required"); |
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1370 _startable = true; |
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1371 } |
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1372 |
| 0 | 1373 void WatcherThread::stop() { |
|
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1374 { |
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1375 MutexLockerEx ml(PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1376 _should_terminate = true; |
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1377 OrderAccess::fence(); // ensure WatcherThread sees update in main loop |
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1378 |
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1379 WatcherThread* watcher = watcher_thread(); |
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1380 if (watcher != NULL) |
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1381 watcher->unpark(); |
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1382 } |
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1383 |
| 0 | 1384 // it is ok to take late safepoints here, if needed |
| 1385 MutexLocker mu(Terminator_lock); | |
|
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1386 |
| 0 | 1387 while(watcher_thread() != NULL) { |
| 1388 // This wait should make safepoint checks, wait without a timeout, | |
| 1389 // and wait as a suspend-equivalent condition. | |
| 1390 // | |
| 1391 // Note: If the FlatProfiler is running, then this thread is waiting | |
| 1392 // for the WatcherThread to terminate and the WatcherThread, via the | |
| 1393 // FlatProfiler task, is waiting for the external suspend request on | |
| 1394 // this thread to complete. wait_for_ext_suspend_completion() will | |
| 1395 // eventually timeout, but that takes time. Making this wait a | |
| 1396 // suspend-equivalent condition solves that timeout problem. | |
| 1397 // | |
| 1398 Terminator_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
| 1399 Mutex::_as_suspend_equivalent_flag); | |
| 1400 } | |
| 1401 } | |
| 1402 | |
|
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1403 void WatcherThread::unpark() { |
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1404 MutexLockerEx ml(PeriodicTask_lock->owned_by_self() ? NULL : PeriodicTask_lock, Mutex::_no_safepoint_check_flag); |
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1405 PeriodicTask_lock->notify(); |
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1406 } |
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1407 |
| 0 | 1408 void WatcherThread::print_on(outputStream* st) const { |
| 1409 st->print("\"%s\" ", name()); | |
| 1410 Thread::print_on(st); | |
| 1411 st->cr(); | |
| 1412 } | |
| 1413 | |
| 1414 // ======= JavaThread ======== | |
| 1415 | |
|
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1416 #ifdef GRAAL |
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1417 |
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1418 #if GRAAL_COUNTERS_SIZE > 0 |
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1419 jlong JavaThread::_graal_old_thread_counters[GRAAL_COUNTERS_SIZE]; |
|
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1420 |
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1421 bool graal_counters_include(oop threadObj) { |
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1422 return !GRAAL_COUNTERS_EXCLUDE_COMPILER_THREADS || threadObj == NULL || threadObj->klass() != SystemDictionary::CompilerThread_klass(); |
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1423 } |
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1424 |
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1425 void JavaThread::collect_counters(typeArrayOop array) { |
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1426 MutexLocker tl(Threads_lock); |
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1427 for (int i = 0; i < array->length(); i++) { |
|
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1428 array->long_at_put(i, _graal_old_thread_counters[i]); |
|
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1429 } |
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1430 for (JavaThread* tp = Threads::first(); tp != NULL; tp = tp->next()) { |
|
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1431 if (graal_counters_include(tp->threadObj())) { |
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1432 for (int i = 0; i < array->length(); i++) { |
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1433 array->long_at_put(i, array->long_at(i) + tp->_graal_counters[i]); |
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1434 } |
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1435 } |
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1436 } |
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1437 } |
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1438 #else |
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1439 void JavaThread::collect_counters(typeArrayOop array) { |
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1440 // empty |
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1441 } |
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1442 #endif // GRAAL_COUNTERS_SIZE > 0 |
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1443 |
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1444 #endif // GRAAL |
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1445 |
| 0 | 1446 // A JavaThread is a normal Java thread |
| 1447 | |
| 1448 void JavaThread::initialize() { | |
| 1449 // Initialize fields | |
|
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1450 |
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1451 // Set the claimed par_id to -1 (ie not claiming any par_ids) |
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1452 set_claimed_par_id(-1); |
|
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1453 |
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|
1454 _buffer_blob = NULL; |
| 0 | 1455 set_saved_exception_pc(NULL); |
| 1456 set_threadObj(NULL); | |
| 1457 _anchor.clear(); | |
| 1458 set_entry_point(NULL); | |
| 1459 set_jni_functions(jni_functions()); | |
| 1460 set_callee_target(NULL); | |
| 1461 set_vm_result(NULL); | |
| 1462 set_vm_result_2(NULL); | |
| 1463 set_vframe_array_head(NULL); | |
| 1464 set_vframe_array_last(NULL); | |
| 1465 set_deferred_locals(NULL); | |
| 1466 set_deopt_mark(NULL); | |
|
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|
1467 set_deopt_nmethod(NULL); |
| 0 | 1468 clear_must_deopt_id(); |
| 1469 set_monitor_chunks(NULL); | |
| 1470 set_next(NULL); | |
| 1471 set_thread_state(_thread_new); | |
|
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1472 #if INCLUDE_NMT |
| 6197 | 1473 set_recorder(NULL); |
|
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1474 #endif |
| 0 | 1475 _terminated = _not_terminated; |
| 1476 _privileged_stack_top = NULL; | |
| 1477 _array_for_gc = NULL; | |
| 1478 _suspend_equivalent = false; | |
| 1479 _in_deopt_handler = 0; | |
| 1480 _doing_unsafe_access = false; | |
| 1481 _stack_guard_state = stack_guard_unused; | |
|
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1482 #ifdef GRAAL |
|
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1483 _graal_alternate_call_target = NULL; |
|
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1484 _graal_implicit_exception_pc = NULL; |
|
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1485 _graal_compiling = false; |
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1486 #if GRAAL_COUNTERS_SIZE > 0 |
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1487 for (int i = 0; i < GRAAL_COUNTERS_SIZE; i++) { |
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1488 _graal_counters[i] = 0; |
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1489 } |
|
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1490 #endif // GRAAL_COUNTER_SIZE > 0 |
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1491 #endif // GRAAL |
|
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1492 (void)const_cast<oop&>(_exception_oop = NULL); |
| 0 | 1493 _exception_pc = 0; |
| 1494 _exception_handler_pc = 0; | |
| 1903 | 1495 _is_method_handle_return = 0; |
| 0 | 1496 _jvmti_thread_state= NULL; |
|
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1497 _should_post_on_exceptions_flag = JNI_FALSE; |
| 0 | 1498 _jvmti_get_loaded_classes_closure = NULL; |
| 1499 _interp_only_mode = 0; | |
| 1500 _special_runtime_exit_condition = _no_async_condition; | |
| 1501 _pending_async_exception = NULL; | |
| 1502 _thread_stat = NULL; | |
| 1503 _thread_stat = new ThreadStatistics(); | |
| 1504 _blocked_on_compilation = false; | |
| 1505 _jni_active_critical = 0; | |
| 1506 _do_not_unlock_if_synchronized = false; | |
| 1507 _cached_monitor_info = NULL; | |
| 1508 _parker = Parker::Allocate(this) ; | |
|
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1509 _scanned_nmethod = NULL; |
| 0 | 1510 |
| 1511 #ifndef PRODUCT | |
| 1512 _jmp_ring_index = 0; | |
| 1513 for (int ji = 0 ; ji < jump_ring_buffer_size ; ji++ ) { | |
| 1514 record_jump(NULL, NULL, NULL, 0); | |
| 1515 } | |
| 1516 #endif /* PRODUCT */ | |
| 1517 | |
| 1518 set_thread_profiler(NULL); | |
| 1519 if (FlatProfiler::is_active()) { | |
| 1520 // This is where we would decide to either give each thread it's own profiler | |
| 1521 // or use one global one from FlatProfiler, | |
| 1522 // or up to some count of the number of profiled threads, etc. | |
| 1523 ThreadProfiler* pp = new ThreadProfiler(); | |
| 1524 pp->engage(); | |
| 1525 set_thread_profiler(pp); | |
| 1526 } | |
| 1527 | |
| 1528 // Setup safepoint state info for this thread | |
| 1529 ThreadSafepointState::create(this); | |
| 1530 | |
| 1531 debug_only(_java_call_counter = 0); | |
| 1532 | |
| 1533 // JVMTI PopFrame support | |
| 1534 _popframe_condition = popframe_inactive; | |
| 1535 _popframe_preserved_args = NULL; | |
| 1536 _popframe_preserved_args_size = 0; | |
| 1537 | |
| 1538 pd_initialize(); | |
| 1539 } | |
| 1540 | |
|
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1541 #if INCLUDE_ALL_GCS |
|
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1542 SATBMarkQueueSet JavaThread::_satb_mark_queue_set; |
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1543 DirtyCardQueueSet JavaThread::_dirty_card_queue_set; |
|
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1544 #endif // INCLUDE_ALL_GCS |
|
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1545 |
| 4006 | 1546 JavaThread::JavaThread(bool is_attaching_via_jni) : |
|
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1547 Thread() |
|
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1548 #if INCLUDE_ALL_GCS |
|
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1549 , _satb_mark_queue(&_satb_mark_queue_set), |
|
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1550 _dirty_card_queue(&_dirty_card_queue_set) |
|
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1551 #endif // INCLUDE_ALL_GCS |
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1552 { |
| 0 | 1553 initialize(); |
| 4006 | 1554 if (is_attaching_via_jni) { |
| 1555 _jni_attach_state = _attaching_via_jni; | |
| 1556 } else { | |
| 1557 _jni_attach_state = _not_attaching_via_jni; | |
| 1558 } | |
|
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1559 assert(deferred_card_mark().is_empty(), "Default MemRegion ctor"); |
| 6197 | 1560 _safepoint_visible = false; |
| 0 | 1561 } |
| 1562 | |
| 1563 bool JavaThread::reguard_stack(address cur_sp) { | |
| 1564 if (_stack_guard_state != stack_guard_yellow_disabled) { | |
| 1565 return true; // Stack already guarded or guard pages not needed. | |
| 1566 } | |
| 1567 | |
| 1568 if (register_stack_overflow()) { | |
| 1569 // For those architectures which have separate register and | |
| 1570 // memory stacks, we must check the register stack to see if | |
| 1571 // it has overflowed. | |
| 1572 return false; | |
| 1573 } | |
| 1574 | |
| 1575 // Java code never executes within the yellow zone: the latter is only | |
| 1576 // there to provoke an exception during stack banging. If java code | |
| 1577 // is executing there, either StackShadowPages should be larger, or | |
| 1578 // some exception code in c1, c2 or the interpreter isn't unwinding | |
| 1579 // when it should. | |
| 1580 guarantee(cur_sp > stack_yellow_zone_base(), "not enough space to reguard - increase StackShadowPages"); | |
| 1581 | |
| 1582 enable_stack_yellow_zone(); | |
| 1583 return true; | |
| 1584 } | |
| 1585 | |
| 1586 bool JavaThread::reguard_stack(void) { | |
| 1587 return reguard_stack(os::current_stack_pointer()); | |
| 1588 } | |
| 1589 | |
| 1590 | |
| 1591 void JavaThread::block_if_vm_exited() { | |
| 1592 if (_terminated == _vm_exited) { | |
| 1593 // _vm_exited is set at safepoint, and Threads_lock is never released | |
| 1594 // we will block here forever | |
| 1595 Threads_lock->lock_without_safepoint_check(); | |
| 1596 ShouldNotReachHere(); | |
| 1597 } | |
| 1598 } | |
| 1599 | |
| 1600 | |
| 1601 // Remove this ifdef when C1 is ported to the compiler interface. | |
| 1602 static void compiler_thread_entry(JavaThread* thread, TRAPS); | |
| 1603 | |
|
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1604 JavaThread::JavaThread(ThreadFunction entry_point, size_t stack_sz) : |
|
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|
1605 Thread() |
|
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1606 #if INCLUDE_ALL_GCS |
|
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1607 , _satb_mark_queue(&_satb_mark_queue_set), |
|
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1608 _dirty_card_queue(&_dirty_card_queue_set) |
|
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1609 #endif // INCLUDE_ALL_GCS |
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|
1610 { |
| 0 | 1611 if (TraceThreadEvents) { |
| 1612 tty->print_cr("creating thread %p", this); | |
| 1613 } | |
| 1614 initialize(); | |
| 4006 | 1615 _jni_attach_state = _not_attaching_via_jni; |
| 0 | 1616 set_entry_point(entry_point); |
| 1617 // Create the native thread itself. | |
| 1618 // %note runtime_23 | |
| 1619 os::ThreadType thr_type = os::java_thread; | |
| 1620 thr_type = entry_point == &compiler_thread_entry ? os::compiler_thread : | |
| 1621 os::java_thread; | |
| 1622 os::create_thread(this, thr_type, stack_sz); | |
| 6197 | 1623 _safepoint_visible = false; |
| 0 | 1624 // The _osthread may be NULL here because we ran out of memory (too many threads active). |
| 1625 // We need to throw and OutOfMemoryError - however we cannot do this here because the caller | |
| 1626 // may hold a lock and all locks must be unlocked before throwing the exception (throwing | |
| 1627 // the exception consists of creating the exception object & initializing it, initialization | |
| 1628 // will leave the VM via a JavaCall and then all locks must be unlocked). | |
| 1629 // | |
| 1630 // The thread is still suspended when we reach here. Thread must be explicit started | |
| 1631 // by creator! Furthermore, the thread must also explicitly be added to the Threads list | |
| 1632 // by calling Threads:add. The reason why this is not done here, is because the thread | |
| 1633 // object must be fully initialized (take a look at JVM_Start) | |
| 1634 } | |
| 1635 | |
| 1636 JavaThread::~JavaThread() { | |
| 1637 if (TraceThreadEvents) { | |
| 1638 tty->print_cr("terminate thread %p", this); | |
| 1639 } | |
| 1640 | |
|
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1641 // By now, this thread should already be invisible to safepoint, |
|
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1642 // and its per-thread recorder also collected. |
| 6197 | 1643 assert(!is_safepoint_visible(), "wrong state"); |
|
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|
1644 #if INCLUDE_NMT |
|
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1645 assert(get_recorder() == NULL, "Already collected"); |
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1646 #endif // INCLUDE_NMT |
| 6197 | 1647 |
| 0 | 1648 // JSR166 -- return the parker to the free list |
| 1649 Parker::Release(_parker); | |
| 1650 _parker = NULL ; | |
| 1651 | |
| 1652 // Free any remaining previous UnrollBlock | |
| 1653 vframeArray* old_array = vframe_array_last(); | |
| 1654 | |
| 1655 if (old_array != NULL) { | |
| 1656 Deoptimization::UnrollBlock* old_info = old_array->unroll_block(); | |
| 1657 old_array->set_unroll_block(NULL); | |
| 1658 delete old_info; | |
| 1659 delete old_array; | |
| 1660 } | |
| 1661 | |
| 1662 GrowableArray<jvmtiDeferredLocalVariableSet*>* deferred = deferred_locals(); | |
| 1663 if (deferred != NULL) { | |
| 1664 // This can only happen if thread is destroyed before deoptimization occurs. | |
| 1665 assert(deferred->length() != 0, "empty array!"); | |
| 1666 do { | |
| 1667 jvmtiDeferredLocalVariableSet* dlv = deferred->at(0); | |
| 1668 deferred->remove_at(0); | |
| 1669 // individual jvmtiDeferredLocalVariableSet are CHeapObj's | |
| 1670 delete dlv; | |
| 1671 } while (deferred->length() != 0); | |
| 1672 delete deferred; | |
| 1673 } | |
| 1674 | |
| 1675 // All Java related clean up happens in exit | |
| 1676 ThreadSafepointState::destroy(this); | |
| 1677 if (_thread_profiler != NULL) delete _thread_profiler; | |
| 1678 if (_thread_stat != NULL) delete _thread_stat; | |
|
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1679 |
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|
1680 #if defined(GRAAL) && (GRAAL_COUNTERS_SIZE > 0) |
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1681 if (graal_counters_include(threadObj())) { |
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1682 for (int i = 0; i < GRAAL_COUNTERS_SIZE; i++) { |
|
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|
1683 _graal_old_thread_counters[i] += _graal_counters[i]; |
|
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|
1684 } |
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1685 } |
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|
1686 #endif |
| 0 | 1687 } |
| 1688 | |
| 1689 | |
| 1690 // The first routine called by a new Java thread | |
| 1691 void JavaThread::run() { | |
| 1692 // initialize thread-local alloc buffer related fields | |
| 1693 this->initialize_tlab(); | |
| 1694 | |
| 1695 // used to test validitity of stack trace backs | |
| 1696 this->record_base_of_stack_pointer(); | |
| 1697 | |
| 1698 // Record real stack base and size. | |
| 1699 this->record_stack_base_and_size(); | |
| 1700 | |
| 1701 // Initialize thread local storage; set before calling MutexLocker | |
| 1702 this->initialize_thread_local_storage(); | |
| 1703 | |
| 1704 this->create_stack_guard_pages(); | |
| 1705 | |
|
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1706 this->cache_global_variables(); |
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1707 |
| 0 | 1708 // Thread is now sufficient initialized to be handled by the safepoint code as being |
| 1709 // in the VM. Change thread state from _thread_new to _thread_in_vm | |
| 1710 ThreadStateTransition::transition_and_fence(this, _thread_new, _thread_in_vm); | |
| 1711 | |
| 1712 assert(JavaThread::current() == this, "sanity check"); | |
| 1713 assert(!Thread::current()->owns_locks(), "sanity check"); | |
| 1714 | |
| 1715 DTRACE_THREAD_PROBE(start, this); | |
| 1716 | |
| 1717 // This operation might block. We call that after all safepoint checks for a new thread has | |
| 1718 // been completed. | |
| 1719 this->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 1720 | |
| 1721 if (JvmtiExport::should_post_thread_life()) { | |
| 1722 JvmtiExport::post_thread_start(this); | |
| 1723 } | |
| 1724 | |
| 10405 | 1725 EventThreadStart event; |
| 1726 if (event.should_commit()) { | |
| 1727 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
| 1728 event.commit(); | |
| 1729 } | |
|
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|
1730 |
| 0 | 1731 // We call another function to do the rest so we are sure that the stack addresses used |
| 1732 // from there will be lower than the stack base just computed | |
| 1733 thread_main_inner(); | |
| 1734 | |
| 1735 // Note, thread is no longer valid at this point! | |
| 1736 } | |
| 1737 | |
| 1738 | |
| 1739 void JavaThread::thread_main_inner() { | |
| 1740 assert(JavaThread::current() == this, "sanity check"); | |
| 1741 assert(this->threadObj() != NULL, "just checking"); | |
| 1742 | |
|
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|
1743 // Execute thread entry point unless this thread has a pending exception |
|
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|
1744 // or has been stopped before starting. |
| 0 | 1745 // Note: Due to JVM_StopThread we can have pending exceptions already! |
|
2162
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|
1746 if (!this->has_pending_exception() && |
|
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|
1747 !java_lang_Thread::is_stillborn(this->threadObj())) { |
| 4006 | 1748 { |
| 1749 ResourceMark rm(this); | |
| 1750 this->set_native_thread_name(this->get_thread_name()); | |
| 1751 } | |
| 0 | 1752 HandleMark hm(this); |
| 1753 this->entry_point()(this, this); | |
| 1754 } | |
| 1755 | |
| 1756 DTRACE_THREAD_PROBE(stop, this); | |
| 1757 | |
| 1758 this->exit(false); | |
| 1759 delete this; | |
| 1760 } | |
| 1761 | |
| 1762 | |
| 1763 static void ensure_join(JavaThread* thread) { | |
| 1764 // We do not need to grap the Threads_lock, since we are operating on ourself. | |
| 1765 Handle threadObj(thread, thread->threadObj()); | |
| 1766 assert(threadObj.not_null(), "java thread object must exist"); | |
| 1767 ObjectLocker lock(threadObj, thread); | |
| 1768 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
| 1769 thread->clear_pending_exception(); | |
| 1770 // Thread is exiting. So set thread_status field in java.lang.Thread class to TERMINATED. | |
| 1771 java_lang_Thread::set_thread_status(threadObj(), java_lang_Thread::TERMINATED); | |
|
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|
1772 // Clear the native thread instance - this makes isAlive return false and allows the join() |
|
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1773 // to complete once we've done the notify_all below |
| 0 | 1774 java_lang_Thread::set_thread(threadObj(), NULL); |
| 1775 lock.notify_all(thread); | |
| 1776 // Ignore pending exception (ThreadDeath), since we are exiting anyway | |
| 1777 thread->clear_pending_exception(); | |
| 1778 } | |
| 1779 | |
|
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|
1780 |
| 0 | 1781 // For any new cleanup additions, please check to see if they need to be applied to |
| 1782 // cleanup_failed_attach_current_thread as well. | |
| 1783 void JavaThread::exit(bool destroy_vm, ExitType exit_type) { | |
| 1784 assert(this == JavaThread::current(), "thread consistency check"); | |
| 1785 | |
| 1786 HandleMark hm(this); | |
| 1787 Handle uncaught_exception(this, this->pending_exception()); | |
| 1788 this->clear_pending_exception(); | |
| 1789 Handle threadObj(this, this->threadObj()); | |
| 1790 assert(threadObj.not_null(), "Java thread object should be created"); | |
| 1791 | |
| 1792 if (get_thread_profiler() != NULL) { | |
| 1793 get_thread_profiler()->disengage(); | |
| 1794 ResourceMark rm; | |
| 1795 get_thread_profiler()->print(get_thread_name()); | |
| 1796 } | |
| 1797 | |
| 1798 | |
| 1799 // FIXIT: This code should be moved into else part, when reliable 1.2/1.3 check is in place | |
| 1800 { | |
| 1801 EXCEPTION_MARK; | |
| 1802 | |
| 1803 CLEAR_PENDING_EXCEPTION; | |
| 1804 } | |
| 1805 // FIXIT: The is_null check is only so it works better on JDK1.2 VM's. This | |
| 1806 // has to be fixed by a runtime query method | |
| 1807 if (!destroy_vm || JDK_Version::is_jdk12x_version()) { | |
| 1808 // JSR-166: change call from from ThreadGroup.uncaughtException to | |
| 1809 // java.lang.Thread.dispatchUncaughtException | |
| 1810 if (uncaught_exception.not_null()) { | |
| 1811 Handle group(this, java_lang_Thread::threadGroup(threadObj())); | |
| 1812 { | |
| 1813 EXCEPTION_MARK; | |
| 1814 // Check if the method Thread.dispatchUncaughtException() exists. If so | |
| 1815 // call it. Otherwise we have an older library without the JSR-166 changes, | |
| 1816 // so call ThreadGroup.uncaughtException() | |
| 1817 KlassHandle recvrKlass(THREAD, threadObj->klass()); | |
| 1818 CallInfo callinfo; | |
| 1142 | 1819 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
| 0 | 1820 LinkResolver::resolve_virtual_call(callinfo, threadObj, recvrKlass, thread_klass, |
|
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1821 vmSymbols::dispatchUncaughtException_name(), |
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1822 vmSymbols::throwable_void_signature(), |
| 0 | 1823 KlassHandle(), false, false, THREAD); |
| 1824 CLEAR_PENDING_EXCEPTION; | |
| 1825 methodHandle method = callinfo.selected_method(); | |
| 1826 if (method.not_null()) { | |
| 1827 JavaValue result(T_VOID); | |
| 1828 JavaCalls::call_virtual(&result, | |
| 1829 threadObj, thread_klass, | |
|
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1830 vmSymbols::dispatchUncaughtException_name(), |
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1831 vmSymbols::throwable_void_signature(), |
| 0 | 1832 uncaught_exception, |
| 1833 THREAD); | |
| 1834 } else { | |
| 1142 | 1835 KlassHandle thread_group(THREAD, SystemDictionary::ThreadGroup_klass()); |
| 0 | 1836 JavaValue result(T_VOID); |
| 1837 JavaCalls::call_virtual(&result, | |
| 1838 group, thread_group, | |
|
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1839 vmSymbols::uncaughtException_name(), |
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1840 vmSymbols::thread_throwable_void_signature(), |
| 0 | 1841 threadObj, // Arg 1 |
| 1842 uncaught_exception, // Arg 2 | |
| 1843 THREAD); | |
| 1844 } | |
|
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1845 if (HAS_PENDING_EXCEPTION) { |
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1846 ResourceMark rm(this); |
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1847 jio_fprintf(defaultStream::error_stream(), |
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1848 "\nException: %s thrown from the UncaughtExceptionHandler" |
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1849 " in thread \"%s\"\n", |
| 6983 | 1850 pending_exception()->klass()->external_name(), |
|
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1851 get_thread_name()); |
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1852 CLEAR_PENDING_EXCEPTION; |
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1853 } |
| 0 | 1854 } |
| 1855 } | |
| 1856 | |
|
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1857 // Called before the java thread exit since we want to read info |
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1858 // from java_lang_Thread object |
| 10405 | 1859 EventThreadEnd event; |
| 1860 if (event.should_commit()) { | |
| 1861 event.set_javalangthread(java_lang_Thread::thread_id(this->threadObj())); | |
| 1862 event.commit(); | |
| 1863 } | |
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1864 |
|
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1865 // Call after last event on thread |
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1866 EVENT_THREAD_EXIT(this); |
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1867 |
| 0 | 1868 // Call Thread.exit(). We try 3 times in case we got another Thread.stop during |
| 1869 // the execution of the method. If that is not enough, then we don't really care. Thread.stop | |
| 1870 // is deprecated anyhow. | |
|
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1871 if (!is_Compiler_thread()) { |
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1872 int count = 3; |
| 0 | 1873 while (java_lang_Thread::threadGroup(threadObj()) != NULL && (count-- > 0)) { |
| 1874 EXCEPTION_MARK; | |
| 1875 JavaValue result(T_VOID); | |
| 1142 | 1876 KlassHandle thread_klass(THREAD, SystemDictionary::Thread_klass()); |
| 0 | 1877 JavaCalls::call_virtual(&result, |
| 1878 threadObj, thread_klass, | |
|
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1879 vmSymbols::exit_method_name(), |
|
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1880 vmSymbols::void_method_signature(), |
| 0 | 1881 THREAD); |
| 1882 CLEAR_PENDING_EXCEPTION; | |
| 1883 } | |
| 1884 } | |
| 1885 // notify JVMTI | |
| 1886 if (JvmtiExport::should_post_thread_life()) { | |
| 1887 JvmtiExport::post_thread_end(this); | |
| 1888 } | |
| 1889 | |
| 1890 // We have notified the agents that we are exiting, before we go on, | |
| 1891 // we must check for a pending external suspend request and honor it | |
| 1892 // in order to not surprise the thread that made the suspend request. | |
| 1893 while (true) { | |
| 1894 { | |
| 1895 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 1896 if (!is_external_suspend()) { | |
| 1897 set_terminated(_thread_exiting); | |
| 1898 ThreadService::current_thread_exiting(this); | |
| 1899 break; | |
| 1900 } | |
| 1901 // Implied else: | |
| 1902 // Things get a little tricky here. We have a pending external | |
| 1903 // suspend request, but we are holding the SR_lock so we | |
| 1904 // can't just self-suspend. So we temporarily drop the lock | |
| 1905 // and then self-suspend. | |
| 1906 } | |
| 1907 | |
| 1908 ThreadBlockInVM tbivm(this); | |
| 1909 java_suspend_self(); | |
| 1910 | |
| 1911 // We're done with this suspend request, but we have to loop around | |
| 1912 // and check again. Eventually we will get SR_lock without a pending | |
| 1913 // external suspend request and will be able to mark ourselves as | |
| 1914 // exiting. | |
| 1915 } | |
| 1916 // no more external suspends are allowed at this point | |
| 1917 } else { | |
| 1918 // before_exit() has already posted JVMTI THREAD_END events | |
| 1919 } | |
| 1920 | |
| 1921 // Notify waiters on thread object. This has to be done after exit() is called | |
| 1922 // on the thread (if the thread is the last thread in a daemon ThreadGroup the | |
| 1923 // group should have the destroyed bit set before waiters are notified). | |
| 1924 ensure_join(this); | |
| 1925 assert(!this->has_pending_exception(), "ensure_join should have cleared"); | |
| 1926 | |
| 1927 // 6282335 JNI DetachCurrentThread spec states that all Java monitors | |
| 1928 // held by this thread must be released. A detach operation must only | |
| 1929 // get here if there are no Java frames on the stack. Therefore, any | |
| 1930 // owned monitors at this point MUST be JNI-acquired monitors which are | |
| 1931 // pre-inflated and in the monitor cache. | |
| 1932 // | |
| 1933 // ensure_join() ignores IllegalThreadStateExceptions, and so does this. | |
| 1934 if (exit_type == jni_detach && JNIDetachReleasesMonitors) { | |
| 1935 assert(!this->has_last_Java_frame(), "detaching with Java frames?"); | |
| 1936 ObjectSynchronizer::release_monitors_owned_by_thread(this); | |
| 1937 assert(!this->has_pending_exception(), "release_monitors should have cleared"); | |
| 1938 } | |
| 1939 | |
| 1940 // These things needs to be done while we are still a Java Thread. Make sure that thread | |
| 1941 // is in a consistent state, in case GC happens | |
| 1942 assert(_privileged_stack_top == NULL, "must be NULL when we get here"); | |
| 1943 | |
| 1944 if (active_handles() != NULL) { | |
| 1945 JNIHandleBlock* block = active_handles(); | |
| 1946 set_active_handles(NULL); | |
| 1947 JNIHandleBlock::release_block(block); | |
| 1948 } | |
| 1949 | |
| 1950 if (free_handle_block() != NULL) { | |
| 1951 JNIHandleBlock* block = free_handle_block(); | |
| 1952 set_free_handle_block(NULL); | |
| 1953 JNIHandleBlock::release_block(block); | |
| 1954 } | |
| 1955 | |
| 1956 // These have to be removed while this is still a valid thread. | |
| 1957 remove_stack_guard_pages(); | |
| 1958 | |
| 1959 if (UseTLAB) { | |
| 1960 tlab().make_parsable(true); // retire TLAB | |
| 1961 } | |
| 1962 | |
|
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1963 if (JvmtiEnv::environments_might_exist()) { |
|
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1964 JvmtiExport::cleanup_thread(this); |
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1965 } |
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1966 |
|
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1967 // We must flush any deferred card marks before removing a thread from |
|
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1968 // the list of active threads. |
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1969 Universe::heap()->flush_deferred_store_barrier(this); |
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1970 assert(deferred_card_mark().is_empty(), "Should have been flushed"); |
|
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1971 |
|
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1972 #if INCLUDE_ALL_GCS |
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1973 // We must flush the G1-related buffers before removing a thread |
|
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1974 // from the list of active threads. We must do this after any deferred |
|
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1975 // card marks have been flushed (above) so that any entries that are |
|
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8001384: G1: assert(!is_null(v)) failed: narrow oop value can never be zero
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1976 // added to the thread's dirty card queue as a result are not lost. |
|
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1977 if (UseG1GC) { |
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1978 flush_barrier_queues(); |
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1979 } |
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1980 #endif // INCLUDE_ALL_GCS |
|
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1981 |
| 0 | 1982 // Remove from list of active threads list, and notify VM thread if we are the last non-daemon thread |
| 1983 Threads::remove(this); | |
| 1984 } | |
| 1985 | |
|
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1986 #if INCLUDE_ALL_GCS |
|
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1987 // Flush G1-related queues. |
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1988 void JavaThread::flush_barrier_queues() { |
|
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1989 satb_mark_queue().flush(); |
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1990 dirty_card_queue().flush(); |
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1991 } |
|
1842
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1992 |
|
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1993 void JavaThread::initialize_queues() { |
|
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1994 assert(!SafepointSynchronize::is_at_safepoint(), |
|
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1995 "we should not be at a safepoint"); |
|
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1996 |
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1997 ObjPtrQueue& satb_queue = satb_mark_queue(); |
|
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1998 SATBMarkQueueSet& satb_queue_set = satb_mark_queue_set(); |
|
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1999 // The SATB queue should have been constructed with its active |
|
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2000 // field set to false. |
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2001 assert(!satb_queue.is_active(), "SATB queue should not be active"); |
|
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2002 assert(satb_queue.is_empty(), "SATB queue should be empty"); |
|
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2003 // If we are creating the thread during a marking cycle, we should |
|
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2004 // set the active field of the SATB queue to true. |
|
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2005 if (satb_queue_set.is_active()) { |
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2006 satb_queue.set_active(true); |
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2007 } |
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2008 |
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2009 DirtyCardQueue& dirty_queue = dirty_card_queue(); |
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2010 // The dirty card queue should have been constructed with its |
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2011 // active field set to true. |
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2012 assert(dirty_queue.is_active(), "dirty card queue should be active"); |
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2013 } |
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2014 #endif // INCLUDE_ALL_GCS |
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2015 |
| 0 | 2016 void JavaThread::cleanup_failed_attach_current_thread() { |
|
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2017 if (get_thread_profiler() != NULL) { |
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2018 get_thread_profiler()->disengage(); |
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2019 ResourceMark rm; |
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2020 get_thread_profiler()->print(get_thread_name()); |
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2021 } |
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2022 |
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2023 if (active_handles() != NULL) { |
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2024 JNIHandleBlock* block = active_handles(); |
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2025 set_active_handles(NULL); |
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2026 JNIHandleBlock::release_block(block); |
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2027 } |
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2028 |
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2029 if (free_handle_block() != NULL) { |
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2030 JNIHandleBlock* block = free_handle_block(); |
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2031 set_free_handle_block(NULL); |
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2032 JNIHandleBlock::release_block(block); |
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2033 } |
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2034 |
|
1290
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2035 // These have to be removed while this is still a valid thread. |
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2036 remove_stack_guard_pages(); |
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2037 |
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2038 if (UseTLAB) { |
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2039 tlab().make_parsable(true); // retire TLAB, if any |
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2040 } |
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2041 |
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2042 #if INCLUDE_ALL_GCS |
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441
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2043 if (UseG1GC) { |
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2044 flush_barrier_queues(); |
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2045 } |
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2046 #endif // INCLUDE_ALL_GCS |
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2047 |
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2048 Threads::remove(this); |
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2049 delete this; |
| 0 | 2050 } |
| 2051 | |
| 2052 | |
|
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2053 |
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2054 |
| 0 | 2055 JavaThread* JavaThread::active() { |
| 2056 Thread* thread = ThreadLocalStorage::thread(); | |
| 2057 assert(thread != NULL, "just checking"); | |
| 2058 if (thread->is_Java_thread()) { | |
| 2059 return (JavaThread*) thread; | |
| 2060 } else { | |
| 2061 assert(thread->is_VM_thread(), "this must be a vm thread"); | |
| 2062 VM_Operation* op = ((VMThread*) thread)->vm_operation(); | |
| 2063 JavaThread *ret=op == NULL ? NULL : (JavaThread *)op->calling_thread(); | |
| 2064 assert(ret->is_Java_thread(), "must be a Java thread"); | |
| 2065 return ret; | |
| 2066 } | |
| 2067 } | |
| 2068 | |
| 2069 bool JavaThread::is_lock_owned(address adr) const { | |
|
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2070 if (Thread::is_lock_owned(adr)) return true; |
| 0 | 2071 |
| 2072 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
| 2073 if (chunk->contains(adr)) return true; | |
| 2074 } | |
| 2075 | |
| 2076 return false; | |
| 2077 } | |
| 2078 | |
| 2079 | |
| 2080 void JavaThread::add_monitor_chunk(MonitorChunk* chunk) { | |
| 2081 chunk->set_next(monitor_chunks()); | |
| 2082 set_monitor_chunks(chunk); | |
| 2083 } | |
| 2084 | |
| 2085 void JavaThread::remove_monitor_chunk(MonitorChunk* chunk) { | |
| 2086 guarantee(monitor_chunks() != NULL, "must be non empty"); | |
| 2087 if (monitor_chunks() == chunk) { | |
| 2088 set_monitor_chunks(chunk->next()); | |
| 2089 } else { | |
| 2090 MonitorChunk* prev = monitor_chunks(); | |
| 2091 while (prev->next() != chunk) prev = prev->next(); | |
| 2092 prev->set_next(chunk->next()); | |
| 2093 } | |
| 2094 } | |
| 2095 | |
| 2096 // JVM support. | |
| 2097 | |
| 2098 // Note: this function shouldn't block if it's called in | |
| 2099 // _thread_in_native_trans state (such as from | |
| 2100 // check_special_condition_for_native_trans()). | |
| 2101 void JavaThread::check_and_handle_async_exceptions(bool check_unsafe_error) { | |
| 2102 | |
| 2103 if (has_last_Java_frame() && has_async_condition()) { | |
| 2104 // If we are at a polling page safepoint (not a poll return) | |
| 2105 // then we must defer async exception because live registers | |
| 2106 // will be clobbered by the exception path. Poll return is | |
| 2107 // ok because the call we a returning from already collides | |
| 2108 // with exception handling registers and so there is no issue. | |
| 2109 // (The exception handling path kills call result registers but | |
| 2110 // this is ok since the exception kills the result anyway). | |
| 2111 | |
| 2112 if (is_at_poll_safepoint()) { | |
| 2113 // if the code we are returning to has deoptimized we must defer | |
| 2114 // the exception otherwise live registers get clobbered on the | |
| 2115 // exception path before deoptimization is able to retrieve them. | |
| 2116 // | |
| 2117 RegisterMap map(this, false); | |
| 2118 frame caller_fr = last_frame().sender(&map); | |
| 2119 assert(caller_fr.is_compiled_frame(), "what?"); | |
| 2120 if (caller_fr.is_deoptimized_frame()) { | |
| 2121 if (TraceExceptions) { | |
| 2122 ResourceMark rm; | |
| 2123 tty->print_cr("deferred async exception at compiled safepoint"); | |
| 2124 } | |
| 2125 return; | |
| 2126 } | |
| 2127 } | |
| 2128 } | |
| 2129 | |
| 2130 JavaThread::AsyncRequests condition = clear_special_runtime_exit_condition(); | |
| 2131 if (condition == _no_async_condition) { | |
| 2132 // Conditions have changed since has_special_runtime_exit_condition() | |
| 2133 // was called: | |
| 2134 // - if we were here only because of an external suspend request, | |
| 2135 // then that was taken care of above (or cancelled) so we are done | |
| 2136 // - if we were here because of another async request, then it has | |
| 2137 // been cleared between the has_special_runtime_exit_condition() | |
| 2138 // and now so again we are done | |
| 2139 return; | |
| 2140 } | |
| 2141 | |
| 2142 // Check for pending async. exception | |
| 2143 if (_pending_async_exception != NULL) { | |
| 2144 // Only overwrite an already pending exception, if it is not a threadDeath. | |
| 1142 | 2145 if (!has_pending_exception() || !pending_exception()->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 2146 |
| 2147 // We cannot call Exceptions::_throw(...) here because we cannot block | |
| 2148 set_pending_exception(_pending_async_exception, __FILE__, __LINE__); | |
| 2149 | |
| 2150 if (TraceExceptions) { | |
| 2151 ResourceMark rm; | |
| 2152 tty->print("Async. exception installed at runtime exit (" INTPTR_FORMAT ")", this); | |
| 2153 if (has_last_Java_frame() ) { | |
| 2154 frame f = last_frame(); | |
| 2155 tty->print(" (pc: " INTPTR_FORMAT " sp: " INTPTR_FORMAT " )", f.pc(), f.sp()); | |
| 2156 } | |
|
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diff
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|
2157 tty->print_cr(" of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
| 0 | 2158 } |
| 2159 _pending_async_exception = NULL; | |
| 2160 clear_has_async_exception(); | |
| 2161 } | |
| 2162 } | |
| 2163 | |
| 2164 if (check_unsafe_error && | |
| 2165 condition == _async_unsafe_access_error && !has_pending_exception()) { | |
| 2166 condition = _no_async_condition; // done | |
| 2167 switch (thread_state()) { | |
| 2168 case _thread_in_vm: | |
| 2169 { | |
| 2170 JavaThread* THREAD = this; | |
| 2171 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
| 2172 } | |
| 2173 case _thread_in_native: | |
| 2174 { | |
| 2175 ThreadInVMfromNative tiv(this); | |
| 2176 JavaThread* THREAD = this; | |
| 2177 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in an unsafe memory access operation"); | |
| 2178 } | |
| 2179 case _thread_in_Java: | |
| 2180 { | |
| 2181 ThreadInVMfromJava tiv(this); | |
| 2182 JavaThread* THREAD = this; | |
| 2183 THROW_MSG(vmSymbols::java_lang_InternalError(), "a fault occurred in a recent unsafe memory access operation in compiled Java code"); | |
| 2184 } | |
| 2185 default: | |
| 2186 ShouldNotReachHere(); | |
| 2187 } | |
| 2188 } | |
| 2189 | |
| 2190 assert(condition == _no_async_condition || has_pending_exception() || | |
| 2191 (!check_unsafe_error && condition == _async_unsafe_access_error), | |
| 2192 "must have handled the async condition, if no exception"); | |
| 2193 } | |
| 2194 | |
| 2195 void JavaThread::handle_special_runtime_exit_condition(bool check_asyncs) { | |
| 2196 // | |
| 2197 // Check for pending external suspend. Internal suspend requests do | |
| 2198 // not use handle_special_runtime_exit_condition(). | |
| 2199 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
| 2200 // thread is not the current thread. In older versions of jdbx, jdbx | |
| 2201 // threads could call into the VM with another thread's JNIEnv so we | |
| 2202 // can be here operating on behalf of a suspended thread (4432884). | |
| 2203 bool do_self_suspend = is_external_suspend_with_lock(); | |
| 2204 if (do_self_suspend && (!AllowJNIEnvProxy || this == JavaThread::current())) { | |
| 2205 // | |
| 2206 // Because thread is external suspended the safepoint code will count | |
| 2207 // thread as at a safepoint. This can be odd because we can be here | |
| 2208 // as _thread_in_Java which would normally transition to _thread_blocked | |
| 2209 // at a safepoint. We would like to mark the thread as _thread_blocked | |
| 2210 // before calling java_suspend_self like all other callers of it but | |
| 2211 // we must then observe proper safepoint protocol. (We can't leave | |
| 2212 // _thread_blocked with a safepoint in progress). However we can be | |
| 2213 // here as _thread_in_native_trans so we can't use a normal transition | |
| 2214 // constructor/destructor pair because they assert on that type of | |
| 2215 // transition. We could do something like: | |
| 2216 // | |
| 2217 // JavaThreadState state = thread_state(); | |
| 2218 // set_thread_state(_thread_in_vm); | |
| 2219 // { | |
| 2220 // ThreadBlockInVM tbivm(this); | |
| 2221 // java_suspend_self() | |
| 2222 // } | |
| 2223 // set_thread_state(_thread_in_vm_trans); | |
| 2224 // if (safepoint) block; | |
| 2225 // set_thread_state(state); | |
| 2226 // | |
| 2227 // but that is pretty messy. Instead we just go with the way the | |
| 2228 // code has worked before and note that this is the only path to | |
| 2229 // java_suspend_self that doesn't put the thread in _thread_blocked | |
| 2230 // mode. | |
| 2231 | |
| 2232 frame_anchor()->make_walkable(this); | |
| 2233 java_suspend_self(); | |
| 2234 | |
| 2235 // We might be here for reasons in addition to the self-suspend request | |
| 2236 // so check for other async requests. | |
| 2237 } | |
| 2238 | |
| 2239 if (check_asyncs) { | |
| 2240 check_and_handle_async_exceptions(); | |
| 2241 } | |
| 2242 } | |
| 2243 | |
| 2244 void JavaThread::send_thread_stop(oop java_throwable) { | |
| 2245 assert(Thread::current()->is_VM_thread(), "should be in the vm thread"); | |
| 2246 assert(Threads_lock->is_locked(), "Threads_lock should be locked by safepoint code"); | |
| 2247 assert(SafepointSynchronize::is_at_safepoint(), "all threads are stopped"); | |
| 2248 | |
| 2249 // Do not throw asynchronous exceptions against the compiler thread | |
| 2250 // (the compiler thread should not be a Java thread -- fix in 1.4.2) | |
| 2251 if (is_Compiler_thread()) return; | |
| 2252 | |
| 2253 { | |
| 2254 // Actually throw the Throwable against the target Thread - however | |
| 2255 // only if there is no thread death exception installed already. | |
| 1142 | 2256 if (_pending_async_exception == NULL || !_pending_async_exception->is_a(SystemDictionary::ThreadDeath_klass())) { |
| 0 | 2257 // If the topmost frame is a runtime stub, then we are calling into |
| 2258 // OptoRuntime from compiled code. Some runtime stubs (new, monitor_exit..) | |
| 2259 // must deoptimize the caller before continuing, as the compiled exception handler table | |
| 2260 // may not be valid | |
| 2261 if (has_last_Java_frame()) { | |
| 2262 frame f = last_frame(); | |
| 2263 if (f.is_runtime_frame() || f.is_safepoint_blob_frame()) { | |
| 2264 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
| 2265 RegisterMap reg_map(this, UseBiasedLocking); | |
| 2266 frame compiled_frame = f.sender(®_map); | |
|
7428
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diff
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|
2267 if (!StressCompiledExceptionHandlers && compiled_frame.can_be_deoptimized()) { |
|
13188
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deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13114
diff
changeset
|
2268 Deoptimization::deoptimize(this, compiled_frame, ®_map); |
| 0 | 2269 } |
| 2270 } | |
| 2271 } | |
| 2272 | |
| 2273 // Set async. pending exception in thread. | |
| 2274 set_pending_async_exception(java_throwable); | |
| 2275 | |
| 2276 if (TraceExceptions) { | |
| 2277 ResourceMark rm; | |
|
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diff
changeset
|
2278 tty->print_cr("Pending Async. exception installed of type: %s", InstanceKlass::cast(_pending_async_exception->klass())->external_name()); |
| 0 | 2279 } |
| 2280 // for AbortVMOnException flag | |
|
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|
2281 NOT_PRODUCT(Exceptions::debug_check_abort(InstanceKlass::cast(_pending_async_exception->klass())->external_name())); |
| 0 | 2282 } |
| 2283 } | |
| 2284 | |
| 2285 | |
| 2286 // Interrupt thread so it will wake up from a potential wait() | |
| 2287 Thread::interrupt(this); | |
| 2288 } | |
| 2289 | |
| 2290 // External suspension mechanism. | |
| 2291 // | |
| 2292 // Tell the VM to suspend a thread when ever it knows that it does not hold on | |
| 2293 // to any VM_locks and it is at a transition | |
| 2294 // Self-suspension will happen on the transition out of the vm. | |
| 2295 // Catch "this" coming in from JNIEnv pointers when the thread has been freed | |
| 2296 // | |
| 2297 // Guarantees on return: | |
| 2298 // + Target thread will not execute any new bytecode (that's why we need to | |
| 2299 // force a safepoint) | |
| 2300 // + Target thread will not enter any new monitors | |
| 2301 // | |
| 2302 void JavaThread::java_suspend() { | |
| 2303 { MutexLocker mu(Threads_lock); | |
| 2304 if (!Threads::includes(this) || is_exiting() || this->threadObj() == NULL) { | |
| 2305 return; | |
| 2306 } | |
| 2307 } | |
| 2308 | |
| 2309 { MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 2310 if (!is_external_suspend()) { | |
| 2311 // a racing resume has cancelled us; bail out now | |
| 2312 return; | |
| 2313 } | |
| 2314 | |
| 2315 // suspend is done | |
| 2316 uint32_t debug_bits = 0; | |
| 2317 // Warning: is_ext_suspend_completed() may temporarily drop the | |
| 2318 // SR_lock to allow the thread to reach a stable thread state if | |
| 2319 // it is currently in a transient thread state. | |
| 2320 if (is_ext_suspend_completed(false /* !called_by_wait */, | |
| 2321 SuspendRetryDelay, &debug_bits) ) { | |
| 2322 return; | |
| 2323 } | |
| 2324 } | |
| 2325 | |
| 2326 VM_ForceSafepoint vm_suspend; | |
| 2327 VMThread::execute(&vm_suspend); | |
| 2328 } | |
| 2329 | |
| 2330 // Part II of external suspension. | |
| 2331 // A JavaThread self suspends when it detects a pending external suspend | |
| 2332 // request. This is usually on transitions. It is also done in places | |
| 2333 // where continuing to the next transition would surprise the caller, | |
| 2334 // e.g., monitor entry. | |
| 2335 // | |
| 2336 // Returns the number of times that the thread self-suspended. | |
| 2337 // | |
| 2338 // Note: DO NOT call java_suspend_self() when you just want to block current | |
| 2339 // thread. java_suspend_self() is the second stage of cooperative | |
| 2340 // suspension for external suspend requests and should only be used | |
| 2341 // to complete an external suspend request. | |
| 2342 // | |
| 2343 int JavaThread::java_suspend_self() { | |
| 2344 int ret = 0; | |
| 2345 | |
| 2346 // we are in the process of exiting so don't suspend | |
| 2347 if (is_exiting()) { | |
| 2348 clear_external_suspend(); | |
| 2349 return ret; | |
| 2350 } | |
| 2351 | |
| 2352 assert(_anchor.walkable() || | |
| 2353 (is_Java_thread() && !((JavaThread*)this)->has_last_Java_frame()), | |
| 2354 "must have walkable stack"); | |
| 2355 | |
| 2356 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 2357 | |
| 979 | 2358 assert(!this->is_ext_suspended(), |
| 0 | 2359 "a thread trying to self-suspend should not already be suspended"); |
| 2360 | |
| 2361 if (this->is_suspend_equivalent()) { | |
| 2362 // If we are self-suspending as a result of the lifting of a | |
| 2363 // suspend equivalent condition, then the suspend_equivalent | |
| 2364 // flag is not cleared until we set the ext_suspended flag so | |
| 2365 // that wait_for_ext_suspend_completion() returns consistent | |
| 2366 // results. | |
| 2367 this->clear_suspend_equivalent(); | |
| 2368 } | |
| 2369 | |
| 2370 // A racing resume may have cancelled us before we grabbed SR_lock | |
| 2371 // above. Or another external suspend request could be waiting for us | |
| 2372 // by the time we return from SR_lock()->wait(). The thread | |
| 2373 // that requested the suspension may already be trying to walk our | |
| 2374 // stack and if we return now, we can change the stack out from under | |
| 2375 // it. This would be a "bad thing (TM)" and cause the stack walker | |
| 2376 // to crash. We stay self-suspended until there are no more pending | |
| 2377 // external suspend requests. | |
| 2378 while (is_external_suspend()) { | |
| 2379 ret++; | |
| 2380 this->set_ext_suspended(); | |
| 2381 | |
| 2382 // _ext_suspended flag is cleared by java_resume() | |
| 2383 while (is_ext_suspended()) { | |
| 2384 this->SR_lock()->wait(Mutex::_no_safepoint_check_flag); | |
| 2385 } | |
| 2386 } | |
| 2387 | |
| 2388 return ret; | |
| 2389 } | |
| 2390 | |
| 2391 #ifdef ASSERT | |
| 2392 // verify the JavaThread has not yet been published in the Threads::list, and | |
| 2393 // hence doesn't need protection from concurrent access at this stage | |
| 2394 void JavaThread::verify_not_published() { | |
| 2395 if (!Threads_lock->owned_by_self()) { | |
| 2396 MutexLockerEx ml(Threads_lock, Mutex::_no_safepoint_check_flag); | |
| 2397 assert( !Threads::includes(this), | |
| 2398 "java thread shouldn't have been published yet!"); | |
| 2399 } | |
| 2400 else { | |
| 2401 assert( !Threads::includes(this), | |
| 2402 "java thread shouldn't have been published yet!"); | |
| 2403 } | |
| 2404 } | |
| 2405 #endif | |
| 2406 | |
| 2407 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
| 2408 // progress or when _suspend_flags is non-zero. | |
| 2409 // Current thread needs to self-suspend if there is a suspend request and/or | |
| 2410 // block if a safepoint is in progress. | |
| 2411 // Async exception ISN'T checked. | |
| 2412 // Note only the ThreadInVMfromNative transition can call this function | |
| 2413 // directly and when thread state is _thread_in_native_trans | |
| 2414 void JavaThread::check_safepoint_and_suspend_for_native_trans(JavaThread *thread) { | |
| 2415 assert(thread->thread_state() == _thread_in_native_trans, "wrong state"); | |
| 2416 | |
| 2417 JavaThread *curJT = JavaThread::current(); | |
| 2418 bool do_self_suspend = thread->is_external_suspend(); | |
| 2419 | |
| 2420 assert(!curJT->has_last_Java_frame() || curJT->frame_anchor()->walkable(), "Unwalkable stack in native->vm transition"); | |
| 2421 | |
| 2422 // If JNIEnv proxies are allowed, don't self-suspend if the target | |
| 2423 // thread is not the current thread. In older versions of jdbx, jdbx | |
| 2424 // threads could call into the VM with another thread's JNIEnv so we | |
| 2425 // can be here operating on behalf of a suspended thread (4432884). | |
| 2426 if (do_self_suspend && (!AllowJNIEnvProxy || curJT == thread)) { | |
| 2427 JavaThreadState state = thread->thread_state(); | |
| 2428 | |
| 2429 // We mark this thread_blocked state as a suspend-equivalent so | |
| 2430 // that a caller to is_ext_suspend_completed() won't be confused. | |
| 2431 // The suspend-equivalent state is cleared by java_suspend_self(). | |
| 2432 thread->set_suspend_equivalent(); | |
| 2433 | |
| 2434 // If the safepoint code sees the _thread_in_native_trans state, it will | |
| 2435 // wait until the thread changes to other thread state. There is no | |
| 2436 // guarantee on how soon we can obtain the SR_lock and complete the | |
| 2437 // self-suspend request. It would be a bad idea to let safepoint wait for | |
| 2438 // too long. Temporarily change the state to _thread_blocked to | |
| 2439 // let the VM thread know that this thread is ready for GC. The problem | |
| 2440 // of changing thread state is that safepoint could happen just after | |
| 2441 // java_suspend_self() returns after being resumed, and VM thread will | |
| 2442 // see the _thread_blocked state. We must check for safepoint | |
| 2443 // after restoring the state and make sure we won't leave while a safepoint | |
| 2444 // is in progress. | |
| 2445 thread->set_thread_state(_thread_blocked); | |
| 2446 thread->java_suspend_self(); | |
| 2447 thread->set_thread_state(state); | |
| 2448 // Make sure new state is seen by VM thread | |
| 2449 if (os::is_MP()) { | |
| 2450 if (UseMembar) { | |
| 2451 // Force a fence between the write above and read below | |
| 2452 OrderAccess::fence(); | |
| 2453 } else { | |
| 2454 // Must use this rather than serialization page in particular on Windows | |
| 2455 InterfaceSupport::serialize_memory(thread); | |
| 2456 } | |
| 2457 } | |
| 2458 } | |
| 2459 | |
| 2460 if (SafepointSynchronize::do_call_back()) { | |
| 2461 // If we are safepointing, then block the caller which may not be | |
| 2462 // the same as the target thread (see above). | |
| 2463 SafepointSynchronize::block(curJT); | |
| 2464 } | |
| 2465 | |
| 2466 if (thread->is_deopt_suspend()) { | |
| 2467 thread->clear_deopt_suspend(); | |
| 2468 RegisterMap map(thread, false); | |
| 2469 frame f = thread->last_frame(); | |
| 2470 while ( f.id() != thread->must_deopt_id() && ! f.is_first_frame()) { | |
| 2471 f = f.sender(&map); | |
| 2472 } | |
| 2473 if (f.id() == thread->must_deopt_id()) { | |
| 2474 thread->clear_must_deopt_id(); | |
|
1727
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parents:
1689
diff
changeset
|
2475 f.deoptimize(thread); |
| 0 | 2476 } else { |
| 2477 fatal("missed deoptimization!"); | |
| 2478 } | |
| 2479 } | |
| 2480 } | |
| 2481 | |
| 2482 // Slow path when the native==>VM/Java barriers detect a safepoint is in | |
| 2483 // progress or when _suspend_flags is non-zero. | |
| 2484 // Current thread needs to self-suspend if there is a suspend request and/or | |
| 2485 // block if a safepoint is in progress. | |
| 2486 // Also check for pending async exception (not including unsafe access error). | |
| 2487 // Note only the native==>VM/Java barriers can call this function and when | |
| 2488 // thread state is _thread_in_native_trans. | |
| 2489 void JavaThread::check_special_condition_for_native_trans(JavaThread *thread) { | |
| 2490 check_safepoint_and_suspend_for_native_trans(thread); | |
| 2491 | |
| 2492 if (thread->has_async_exception()) { | |
| 2493 // We are in _thread_in_native_trans state, don't handle unsafe | |
| 2494 // access error since that may block. | |
| 2495 thread->check_and_handle_async_exceptions(false); | |
| 2496 } | |
| 2497 } | |
| 2498 | |
|
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|
2499 // This is a variant of the normal |
|
0382d2b469b2
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diff
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|
2500 // check_special_condition_for_native_trans with slightly different |
|
0382d2b469b2
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parents:
4872
diff
changeset
|
2501 // semantics for use by critical native wrappers. It does all the |
|
0382d2b469b2
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parents:
4872
diff
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|
2502 // normal checks but also performs the transition back into |
|
0382d2b469b2
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never
parents:
4872
diff
changeset
|
2503 // thread_in_Java state. This is required so that critical natives |
|
0382d2b469b2
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parents:
4872
diff
changeset
|
2504 // can potentially block and perform a GC if they are the last thread |
|
0382d2b469b2
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parents:
4872
diff
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|
2505 // exiting the GC_locker. |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
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parents:
4872
diff
changeset
|
2506 void JavaThread::check_special_condition_for_native_trans_and_transition(JavaThread *thread) { |
|
0382d2b469b2
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parents:
4872
diff
changeset
|
2507 check_special_condition_for_native_trans(thread); |
|
0382d2b469b2
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parents:
4872
diff
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|
2508 |
|
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changeset
|
2509 // Finish the transition |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2510 thread->set_thread_state(_thread_in_Java); |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2511 |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2512 if (thread->do_critical_native_unlock()) { |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2513 ThreadInVMfromJavaNoAsyncException tiv(thread); |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2514 GC_locker::unlock_critical(thread); |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2515 thread->clear_critical_native_unlock(); |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2516 } |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2517 } |
|
0382d2b469b2
7013347: allow crypto functions to be called inline to enhance performance
never
parents:
4872
diff
changeset
|
2518 |
| 0 | 2519 // We need to guarantee the Threads_lock here, since resumes are not |
| 2520 // allowed during safepoint synchronization | |
| 2521 // Can only resume from an external suspension | |
| 2522 void JavaThread::java_resume() { | |
| 2523 assert_locked_or_safepoint(Threads_lock); | |
| 2524 | |
| 2525 // Sanity check: thread is gone, has started exiting or the thread | |
| 2526 // was not externally suspended. | |
| 2527 if (!Threads::includes(this) || is_exiting() || !is_external_suspend()) { | |
| 2528 return; | |
| 2529 } | |
| 2530 | |
| 2531 MutexLockerEx ml(SR_lock(), Mutex::_no_safepoint_check_flag); | |
| 2532 | |
| 2533 clear_external_suspend(); | |
| 2534 | |
| 2535 if (is_ext_suspended()) { | |
| 2536 clear_ext_suspended(); | |
| 2537 SR_lock()->notify_all(); | |
| 2538 } | |
| 2539 } | |
| 2540 | |
| 2541 void JavaThread::create_stack_guard_pages() { | |
| 2542 if (! os::uses_stack_guard_pages() || _stack_guard_state != stack_guard_unused) return; | |
| 2543 address low_addr = stack_base() - stack_size(); | |
| 2544 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
| 2545 | |
| 2546 int allocate = os::allocate_stack_guard_pages(); | |
| 2547 // warning("Guarding at " PTR_FORMAT " for len " SIZE_FORMAT "\n", low_addr, len); | |
| 2548 | |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2549 if (allocate && !os::create_stack_guard_pages((char *) low_addr, len)) { |
| 0 | 2550 warning("Attempt to allocate stack guard pages failed."); |
| 2551 return; | |
| 2552 } | |
| 2553 | |
| 2554 if (os::guard_memory((char *) low_addr, len)) { | |
| 2555 _stack_guard_state = stack_guard_enabled; | |
| 2556 } else { | |
| 2557 warning("Attempt to protect stack guard pages failed."); | |
| 2558 if (os::uncommit_memory((char *) low_addr, len)) { | |
| 2559 warning("Attempt to deallocate stack guard pages failed."); | |
| 2560 } | |
| 2561 } | |
| 2562 } | |
| 2563 | |
| 2564 void JavaThread::remove_stack_guard_pages() { | |
|
6882
716c64bda5ba
7199092: NMT: NMT needs to deal overlapped virtual memory ranges
zgu
parents:
6872
diff
changeset
|
2565 assert(Thread::current() == this, "from different thread"); |
| 0 | 2566 if (_stack_guard_state == stack_guard_unused) return; |
| 2567 address low_addr = stack_base() - stack_size(); | |
| 2568 size_t len = (StackYellowPages + StackRedPages) * os::vm_page_size(); | |
| 2569 | |
| 2570 if (os::allocate_stack_guard_pages()) { | |
|
1320
3b3d12e645e7
6929067: Stack guard pages should be removed when thread is detached
coleenp
parents:
1290
diff
changeset
|
2571 if (os::remove_stack_guard_pages((char *) low_addr, len)) { |
| 0 | 2572 _stack_guard_state = stack_guard_unused; |
| 2573 } else { | |
| 2574 warning("Attempt to deallocate stack guard pages failed."); | |
| 2575 } | |
| 2576 } else { | |
| 2577 if (_stack_guard_state == stack_guard_unused) return; | |
| 2578 if (os::unguard_memory((char *) low_addr, len)) { | |
| 2579 _stack_guard_state = stack_guard_unused; | |
| 2580 } else { | |
| 2581 warning("Attempt to unprotect stack guard pages failed."); | |
| 2582 } | |
| 2583 } | |
| 2584 } | |
| 2585 | |
| 2586 void JavaThread::enable_stack_yellow_zone() { | |
| 2587 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2588 assert(_stack_guard_state != stack_guard_enabled, "already enabled"); | |
| 2589 | |
| 2590 // The base notation is from the stacks point of view, growing downward. | |
| 2591 // We need to adjust it to work correctly with guard_memory() | |
| 2592 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
| 2593 | |
| 2594 guarantee(base < stack_base(),"Error calculating stack yellow zone"); | |
| 2595 guarantee(base < os::current_stack_pointer(),"Error calculating stack yellow zone"); | |
| 2596 | |
| 2597 if (os::guard_memory((char *) base, stack_yellow_zone_size())) { | |
| 2598 _stack_guard_state = stack_guard_enabled; | |
| 2599 } else { | |
| 2600 warning("Attempt to guard stack yellow zone failed."); | |
| 2601 } | |
| 2602 enable_register_stack_guard(); | |
| 2603 } | |
| 2604 | |
| 2605 void JavaThread::disable_stack_yellow_zone() { | |
| 2606 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2607 assert(_stack_guard_state != stack_guard_yellow_disabled, "already disabled"); | |
| 2608 | |
| 2609 // Simply return if called for a thread that does not use guard pages. | |
| 2610 if (_stack_guard_state == stack_guard_unused) return; | |
| 2611 | |
| 2612 // The base notation is from the stacks point of view, growing downward. | |
| 2613 // We need to adjust it to work correctly with guard_memory() | |
| 2614 address base = stack_yellow_zone_base() - stack_yellow_zone_size(); | |
| 2615 | |
| 2616 if (os::unguard_memory((char *)base, stack_yellow_zone_size())) { | |
| 2617 _stack_guard_state = stack_guard_yellow_disabled; | |
| 2618 } else { | |
| 2619 warning("Attempt to unguard stack yellow zone failed."); | |
| 2620 } | |
| 2621 disable_register_stack_guard(); | |
| 2622 } | |
| 2623 | |
| 2624 void JavaThread::enable_stack_red_zone() { | |
| 2625 // The base notation is from the stacks point of view, growing downward. | |
| 2626 // We need to adjust it to work correctly with guard_memory() | |
| 2627 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2628 address base = stack_red_zone_base() - stack_red_zone_size(); | |
| 2629 | |
| 2630 guarantee(base < stack_base(),"Error calculating stack red zone"); | |
| 2631 guarantee(base < os::current_stack_pointer(),"Error calculating stack red zone"); | |
| 2632 | |
| 2633 if(!os::guard_memory((char *) base, stack_red_zone_size())) { | |
| 2634 warning("Attempt to guard stack red zone failed."); | |
| 2635 } | |
| 2636 } | |
| 2637 | |
| 2638 void JavaThread::disable_stack_red_zone() { | |
| 2639 // The base notation is from the stacks point of view, growing downward. | |
| 2640 // We need to adjust it to work correctly with guard_memory() | |
| 2641 assert(_stack_guard_state != stack_guard_unused, "must be using guard pages."); | |
| 2642 address base = stack_red_zone_base() - stack_red_zone_size(); | |
| 2643 if (!os::unguard_memory((char *)base, stack_red_zone_size())) { | |
| 2644 warning("Attempt to unguard stack red zone failed."); | |
| 2645 } | |
| 2646 } | |
| 2647 | |
| 2648 void JavaThread::frames_do(void f(frame*, const RegisterMap* map)) { | |
| 2649 // ignore is there is no stack | |
| 2650 if (!has_last_Java_frame()) return; | |
| 2651 // traverse the stack frames. Starts from top frame. | |
| 2652 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
| 2653 frame* fr = fst.current(); | |
| 2654 f(fr, fst.register_map()); | |
| 2655 } | |
| 2656 } | |
| 2657 | |
| 2658 | |
| 2659 #ifndef PRODUCT | |
| 2660 // Deoptimization | |
| 2661 // Function for testing deoptimization | |
| 2662 void JavaThread::deoptimize() { | |
| 2663 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
| 2664 StackFrameStream fst(this, UseBiasedLocking); | |
| 2665 bool deopt = false; // Dump stack only if a deopt actually happens. | |
| 2666 bool only_at = strlen(DeoptimizeOnlyAt) > 0; | |
| 2667 // Iterate over all frames in the thread and deoptimize | |
| 2668 for(; !fst.is_done(); fst.next()) { | |
| 2669 if(fst.current()->can_be_deoptimized()) { | |
| 2670 | |
| 2671 if (only_at) { | |
| 2672 // Deoptimize only at particular bcis. DeoptimizeOnlyAt | |
| 2673 // consists of comma or carriage return separated numbers so | |
| 2674 // search for the current bci in that string. | |
| 2675 address pc = fst.current()->pc(); | |
| 2676 nmethod* nm = (nmethod*) fst.current()->cb(); | |
| 2677 ScopeDesc* sd = nm->scope_desc_at( pc); | |
| 2678 char buffer[8]; | |
| 2679 jio_snprintf(buffer, sizeof(buffer), "%d", sd->bci()); | |
| 2680 size_t len = strlen(buffer); | |
| 2681 const char * found = strstr(DeoptimizeOnlyAt, buffer); | |
| 2682 while (found != NULL) { | |
| 2683 if ((found[len] == ',' || found[len] == '\n' || found[len] == '\0') && | |
| 2684 (found == DeoptimizeOnlyAt || found[-1] == ',' || found[-1] == '\n')) { | |
| 2685 // Check that the bci found is bracketed by terminators. | |
| 2686 break; | |
| 2687 } | |
| 2688 found = strstr(found + 1, buffer); | |
| 2689 } | |
| 2690 if (!found) { | |
| 2691 continue; | |
| 2692 } | |
| 2693 } | |
| 2694 | |
| 2695 if (DebugDeoptimization && !deopt) { | |
| 2696 deopt = true; // One-time only print before deopt | |
| 2697 tty->print_cr("[BEFORE Deoptimization]"); | |
| 2698 trace_frames(); | |
| 2699 trace_stack(); | |
| 2700 } | |
|
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13114
diff
changeset
|
2701 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
| 0 | 2702 } |
| 2703 } | |
| 2704 | |
| 2705 if (DebugDeoptimization && deopt) { | |
| 2706 tty->print_cr("[AFTER Deoptimization]"); | |
| 2707 trace_frames(); | |
| 2708 } | |
| 2709 } | |
| 2710 | |
| 2711 | |
| 2712 // Make zombies | |
| 2713 void JavaThread::make_zombies() { | |
| 2714 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
| 2715 if (fst.current()->can_be_deoptimized()) { | |
| 2716 // it is a Java nmethod | |
| 2717 nmethod* nm = CodeCache::find_nmethod(fst.current()->pc()); | |
| 2718 nm->make_not_entrant(); | |
| 2719 } | |
| 2720 } | |
| 2721 } | |
| 2722 #endif // PRODUCT | |
| 2723 | |
| 2724 | |
| 2725 void JavaThread::deoptimized_wrt_marked_nmethods() { | |
| 2726 if (!has_last_Java_frame()) return; | |
| 2727 // BiasedLocking needs an updated RegisterMap for the revoke monitors pass | |
| 2728 StackFrameStream fst(this, UseBiasedLocking); | |
| 2729 for(; !fst.is_done(); fst.next()) { | |
| 2730 if (fst.current()->should_be_deoptimized()) { | |
| 6843 | 2731 if (LogCompilation && xtty != NULL) { |
| 2732 nmethod* nm = fst.current()->cb()->as_nmethod_or_null(); | |
| 2733 xtty->elem("deoptimized thread='" UINTX_FORMAT "' compile_id='%d'", | |
| 2734 this->name(), nm != NULL ? nm->compile_id() : -1); | |
| 2735 } | |
| 2736 | |
|
13188
6b2d8d20ecbd
deoptimization: add helper to minimize hsx diff #resolve GRAAL-531
Bernhard Urban <bernhard.urban@jku.at>
parents:
13114
diff
changeset
|
2737 Deoptimization::deoptimize(this, *fst.current(), fst.register_map()); |
| 0 | 2738 } |
| 2739 } | |
| 2740 } | |
| 2741 | |
| 2742 | |
| 2743 // GC support | |
| 2744 static void frame_gc_epilogue(frame* f, const RegisterMap* map) { f->gc_epilogue(); } | |
| 2745 | |
| 2746 void JavaThread::gc_epilogue() { | |
| 2747 frames_do(frame_gc_epilogue); | |
| 2748 } | |
| 2749 | |
| 2750 | |
| 2751 static void frame_gc_prologue(frame* f, const RegisterMap* map) { f->gc_prologue(); } | |
| 2752 | |
| 2753 void JavaThread::gc_prologue() { | |
| 2754 frames_do(frame_gc_prologue); | |
| 2755 } | |
| 2756 | |
|
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2757 // 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
|
2758 // 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
|
2759 class RememberProcessedThread: public StackObj { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2760 NamedThread* _cur_thr; |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2761 public: |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2762 RememberProcessedThread(JavaThread* jthr) { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2763 Thread* thread = Thread::current(); |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2764 if (thread->is_Named_thread()) { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2765 _cur_thr = (NamedThread *)thread; |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2766 _cur_thr->set_processed_thread(jthr); |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2767 } else { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2768 _cur_thr = NULL; |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2769 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2770 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2771 |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2772 ~RememberProcessedThread() { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2773 if (_cur_thr) { |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2774 _cur_thr->set_processed_thread(NULL); |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2775 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2776 } |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2777 }; |
| 0 | 2778 |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
2779 void JavaThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
| 1166 | 2780 // Verify that the deferred card marks have been flushed. |
| 2781 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
|
2782 |
| 0 | 2783 // The ThreadProfiler oops_do is done from FlatProfiler::oops_do |
| 2784 // since there may be more than one thread using each ThreadProfiler. | |
| 2785 | |
| 2786 // Traverse the GCHandles | |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
2787 Thread::oops_do(f, cld_f, cf); |
| 0 | 2788 |
| 2789 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
| 2790 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
| 2791 | |
| 2792 if (has_last_Java_frame()) { | |
|
1119
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2793 // Record JavaThread to GC thread |
|
547f81740344
6361589: Print out stack trace for target thread of GC crash
minqi
parents:
1115
diff
changeset
|
2794 RememberProcessedThread rpt(this); |
| 0 | 2795 |
| 2796 // Traverse the privileged stack | |
| 2797 if (_privileged_stack_top != NULL) { | |
| 2798 _privileged_stack_top->oops_do(f); | |
| 2799 } | |
| 2800 | |
| 2801 // traverse the registered growable array | |
| 2802 if (_array_for_gc != NULL) { | |
| 2803 for (int index = 0; index < _array_for_gc->length(); index++) { | |
| 2804 f->do_oop(_array_for_gc->adr_at(index)); | |
| 2805 } | |
| 2806 } | |
| 2807 | |
| 2808 // Traverse the monitor chunks | |
| 2809 for (MonitorChunk* chunk = monitor_chunks(); chunk != NULL; chunk = chunk->next()) { | |
| 2810 chunk->oops_do(f); | |
| 2811 } | |
| 2812 | |
| 2813 // Traverse the execution stack | |
| 2814 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
|
2815 fst.current()->oops_do(f, cld_f, cf, fst.register_map()); |
| 0 | 2816 } |
| 2817 } | |
| 2818 | |
| 2819 // callee_target is never live across a gc point so NULL it here should | |
| 2820 // it still contain a methdOop. | |
| 2821 | |
| 2822 set_callee_target(NULL); | |
| 2823 | |
| 2824 assert(vframe_array_head() == NULL, "deopt in progress at a safepoint!"); | |
| 2825 // If we have deferred set_locals there might be oops waiting to be | |
| 2826 // written | |
| 2827 GrowableArray<jvmtiDeferredLocalVariableSet*>* list = deferred_locals(); | |
| 2828 if (list != NULL) { | |
| 2829 for (int i = 0; i < list->length(); i++) { | |
| 2830 list->at(i)->oops_do(f); | |
| 2831 } | |
| 2832 } | |
| 2833 | |
| 2834 // Traverse instance variables at the end since the GC may be moving things | |
| 2835 // around using this function | |
| 2836 f->do_oop((oop*) &_threadObj); | |
| 2837 f->do_oop((oop*) &_vm_result); | |
| 2838 f->do_oop((oop*) &_exception_oop); | |
| 2839 f->do_oop((oop*) &_pending_async_exception); | |
| 2840 | |
| 2841 if (jvmti_thread_state() != NULL) { | |
| 2842 jvmti_thread_state()->oops_do(f); | |
| 2843 } | |
|
3696
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2844 |
|
dc7902820c9b
Make NMethodSweeper work on any JavaThread
Gilles Duboscq <gilles.m.duboscq@gmail.com>
parents:
3650
diff
changeset
|
2845 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
|
2846 // 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
|
2847 // 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
|
2848 // a scan. |
|
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
2849 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
|
2850 } |
| 0 | 2851 } |
| 2852 | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
844
diff
changeset
|
2853 void JavaThread::nmethods_do(CodeBlobClosure* cf) { |
|
148e5441d916
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|
2854 Thread::nmethods_do(cf); // (super method is a no-op) |
| 0 | 2855 |
| 2856 assert( (!has_last_Java_frame() && java_call_counter() == 0) || | |
| 2857 (has_last_Java_frame() && java_call_counter() > 0), "wrong java_sp info!"); | |
| 2858 | |
| 2859 if (has_last_Java_frame()) { | |
| 2860 // Traverse the execution stack | |
| 2861 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
|
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|
2862 fst.current()->nmethods_do(cf); |
| 0 | 2863 } |
| 2864 } | |
| 2865 } | |
| 2866 | |
|
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2867 void JavaThread::metadata_do(void f(Metadata*)) { |
|
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|
2868 Thread::metadata_do(f); |
|
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|
2869 if (has_last_Java_frame()) { |
|
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|
2870 // Traverse the execution stack to call f() on the methods in the stack |
|
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|
2871 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { |
|
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|
2872 fst.current()->metadata_do(f); |
|
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|
2873 } |
|
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|
2874 } else if (is_Compiler_thread()) { |
|
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|
2875 // need to walk ciMetadata in current compile tasks to keep alive. |
|
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|
2876 CompilerThread* ct = (CompilerThread*)this; |
|
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|
2877 if (ct->env() != NULL) { |
|
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|
2878 ct->env()->metadata_do(f); |
|
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|
2879 } |
|
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|
2880 } |
|
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|
2881 } |
|
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|
2882 |
| 0 | 2883 // Printing |
| 2884 const char* _get_thread_state_name(JavaThreadState _thread_state) { | |
| 2885 switch (_thread_state) { | |
| 2886 case _thread_uninitialized: return "_thread_uninitialized"; | |
| 2887 case _thread_new: return "_thread_new"; | |
| 2888 case _thread_new_trans: return "_thread_new_trans"; | |
| 2889 case _thread_in_native: return "_thread_in_native"; | |
| 2890 case _thread_in_native_trans: return "_thread_in_native_trans"; | |
| 2891 case _thread_in_vm: return "_thread_in_vm"; | |
| 2892 case _thread_in_vm_trans: return "_thread_in_vm_trans"; | |
| 2893 case _thread_in_Java: return "_thread_in_Java"; | |
| 2894 case _thread_in_Java_trans: return "_thread_in_Java_trans"; | |
| 2895 case _thread_blocked: return "_thread_blocked"; | |
| 2896 case _thread_blocked_trans: return "_thread_blocked_trans"; | |
| 2897 default: return "unknown thread state"; | |
| 2898 } | |
| 2899 } | |
| 2900 | |
| 2901 #ifndef PRODUCT | |
| 2902 void JavaThread::print_thread_state_on(outputStream *st) const { | |
| 2903 st->print_cr(" JavaThread state: %s", _get_thread_state_name(_thread_state)); | |
| 2904 }; | |
| 2905 void JavaThread::print_thread_state() const { | |
| 2906 print_thread_state_on(tty); | |
| 2907 }; | |
| 2908 #endif // PRODUCT | |
| 2909 | |
| 2910 // Called by Threads::print() for VM_PrintThreads operation | |
| 2911 void JavaThread::print_on(outputStream *st) const { | |
| 2912 st->print("\"%s\" ", get_thread_name()); | |
| 2913 oop thread_oop = threadObj(); | |
| 6766 | 2914 if (thread_oop != NULL) { |
| 2915 st->print("#" INT64_FORMAT " ", java_lang_Thread::thread_id(thread_oop)); | |
| 2916 if (java_lang_Thread::is_daemon(thread_oop)) st->print("daemon "); | |
| 2917 st->print("prio=%d ", java_lang_Thread::priority(thread_oop)); | |
| 2918 } | |
| 0 | 2919 Thread::print_on(st); |
| 2920 // print guess for valid stack memory region (assume 4K pages); helps lock debugging | |
|
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|
2921 st->print_cr("[" INTPTR_FORMAT "]", (intptr_t)last_Java_sp() & ~right_n_bits(12)); |
| 0 | 2922 if (thread_oop != NULL && JDK_Version::is_gte_jdk15x_version()) { |
| 2923 st->print_cr(" java.lang.Thread.State: %s", java_lang_Thread::thread_status_name(thread_oop)); | |
| 2924 } | |
| 2925 #ifndef PRODUCT | |
| 2926 print_thread_state_on(st); | |
| 2927 _safepoint_state->print_on(st); | |
| 2928 #endif // PRODUCT | |
| 2929 } | |
| 2930 | |
| 2931 // Called by fatal error handler. The difference between this and | |
| 2932 // JavaThread::print() is that we can't grab lock or allocate memory. | |
| 2933 void JavaThread::print_on_error(outputStream* st, char *buf, int buflen) const { | |
| 2934 st->print("JavaThread \"%s\"", get_thread_name_string(buf, buflen)); | |
| 2935 oop thread_obj = threadObj(); | |
| 2936 if (thread_obj != NULL) { | |
| 2937 if (java_lang_Thread::is_daemon(thread_obj)) st->print(" daemon"); | |
| 2938 } | |
| 2939 st->print(" ["); | |
| 2940 st->print("%s", _get_thread_state_name(_thread_state)); | |
| 2941 if (osthread()) { | |
| 2942 st->print(", id=%d", osthread()->thread_id()); | |
| 2943 } | |
| 2944 st->print(", stack(" PTR_FORMAT "," PTR_FORMAT ")", | |
| 2945 _stack_base - _stack_size, _stack_base); | |
| 2946 st->print("]"); | |
| 2947 return; | |
| 2948 } | |
| 2949 | |
| 2950 // Verification | |
| 2951 | |
| 2952 static void frame_verify(frame* f, const RegisterMap *map) { f->verify(map); } | |
| 2953 | |
| 2954 void JavaThread::verify() { | |
| 2955 // Verify oops in the thread. | |
|
7179
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7177
diff
changeset
|
2956 oops_do(&VerifyOopClosure::verify_oop, NULL, NULL); |
| 0 | 2957 |
| 2958 // Verify the stack frames. | |
| 2959 frames_do(frame_verify); | |
| 2960 } | |
| 2961 | |
| 2962 // CR 6300358 (sub-CR 2137150) | |
| 2963 // Most callers of this method assume that it can't return NULL but a | |
| 2964 // thread may not have a name whilst it is in the process of attaching to | |
| 2965 // the VM - see CR 6412693, and there are places where a JavaThread can be | |
| 2966 // seen prior to having it's threadObj set (eg JNI attaching threads and | |
| 2967 // if vm exit occurs during initialization). These cases can all be accounted | |
| 2968 // for such that this method never returns NULL. | |
| 2969 const char* JavaThread::get_thread_name() const { | |
| 2970 #ifdef ASSERT | |
| 2971 // early safepoints can hit while current thread does not yet have TLS | |
| 2972 if (!SafepointSynchronize::is_at_safepoint()) { | |
| 2973 Thread *cur = Thread::current(); | |
| 2974 if (!(cur->is_Java_thread() && cur == this)) { | |
| 2975 // Current JavaThreads are allowed to get their own name without | |
| 2976 // the Threads_lock. | |
| 2977 assert_locked_or_safepoint(Threads_lock); | |
| 2978 } | |
| 2979 } | |
| 2980 #endif // ASSERT | |
| 2981 return get_thread_name_string(); | |
| 2982 } | |
| 2983 | |
| 2984 // Returns a non-NULL representation of this thread's name, or a suitable | |
| 2985 // descriptive string if there is no set name | |
| 2986 const char* JavaThread::get_thread_name_string(char* buf, int buflen) const { | |
| 2987 const char* name_str; | |
| 2988 oop thread_obj = threadObj(); | |
| 2989 if (thread_obj != NULL) { | |
| 2990 typeArrayOop name = java_lang_Thread::name(thread_obj); | |
| 2991 if (name != NULL) { | |
| 2992 if (buf == NULL) { | |
| 2993 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
| 2994 } | |
| 2995 else { | |
| 2996 name_str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length(), buf, buflen); | |
| 2997 } | |
| 2998 } | |
| 4006 | 2999 else if (is_attaching_via_jni()) { // workaround for 6412693 - see 6404306 |
| 0 | 3000 name_str = "<no-name - thread is attaching>"; |
| 3001 } | |
| 3002 else { | |
| 3003 name_str = Thread::name(); | |
| 3004 } | |
| 3005 } | |
| 3006 else { | |
| 3007 name_str = Thread::name(); | |
| 3008 } | |
| 3009 assert(name_str != NULL, "unexpected NULL thread name"); | |
| 3010 return name_str; | |
| 3011 } | |
| 3012 | |
| 3013 | |
| 3014 const char* JavaThread::get_threadgroup_name() const { | |
| 3015 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
| 3016 oop thread_obj = threadObj(); | |
| 3017 if (thread_obj != NULL) { | |
| 3018 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
| 3019 if (thread_group != NULL) { | |
| 3020 typeArrayOop name = java_lang_ThreadGroup::name(thread_group); | |
| 3021 // ThreadGroup.name can be null | |
| 3022 if (name != NULL) { | |
| 3023 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
| 3024 return str; | |
| 3025 } | |
| 3026 } | |
| 3027 } | |
| 3028 return NULL; | |
| 3029 } | |
| 3030 | |
| 3031 const char* JavaThread::get_parent_name() const { | |
| 3032 debug_only(if (JavaThread::current() != this) assert_locked_or_safepoint(Threads_lock);) | |
| 3033 oop thread_obj = threadObj(); | |
| 3034 if (thread_obj != NULL) { | |
| 3035 oop thread_group = java_lang_Thread::threadGroup(thread_obj); | |
| 3036 if (thread_group != NULL) { | |
| 3037 oop parent = java_lang_ThreadGroup::parent(thread_group); | |
| 3038 if (parent != NULL) { | |
| 3039 typeArrayOop name = java_lang_ThreadGroup::name(parent); | |
| 3040 // ThreadGroup.name can be null | |
| 3041 if (name != NULL) { | |
| 3042 const char* str = UNICODE::as_utf8((jchar*) name->base(T_CHAR), name->length()); | |
| 3043 return str; | |
| 3044 } | |
| 3045 } | |
| 3046 } | |
| 3047 } | |
| 3048 return NULL; | |
| 3049 } | |
| 3050 | |
| 3051 ThreadPriority JavaThread::java_priority() const { | |
| 3052 oop thr_oop = threadObj(); | |
| 3053 if (thr_oop == NULL) return NormPriority; // Bootstrapping | |
| 3054 ThreadPriority priority = java_lang_Thread::priority(thr_oop); | |
| 3055 assert(MinPriority <= priority && priority <= MaxPriority, "sanity check"); | |
| 3056 return priority; | |
| 3057 } | |
| 3058 | |
| 3059 void JavaThread::prepare(jobject jni_thread, ThreadPriority prio) { | |
| 3060 | |
| 3061 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); | |
| 3062 // Link Java Thread object <-> C++ Thread | |
| 3063 | |
| 3064 // Get the C++ thread object (an oop) from the JNI handle (a jthread) | |
| 3065 // and put it into a new Handle. The Handle "thread_oop" can then | |
| 3066 // be used to pass the C++ thread object to other methods. | |
| 3067 | |
| 3068 // Set the Java level thread object (jthread) field of the | |
| 3069 // new thread (a JavaThread *) to C++ thread object using the | |
| 3070 // "thread_oop" handle. | |
| 3071 | |
| 3072 // Set the thread field (a JavaThread *) of the | |
| 3073 // oop representing the java_lang_Thread to the new thread (a JavaThread *). | |
| 3074 | |
| 3075 Handle thread_oop(Thread::current(), | |
| 3076 JNIHandles::resolve_non_null(jni_thread)); | |
|
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diff
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|
3077 assert(InstanceKlass::cast(thread_oop->klass())->is_linked(), |
| 0 | 3078 "must be initialized"); |
| 3079 set_threadObj(thread_oop()); | |
| 3080 java_lang_Thread::set_thread(thread_oop(), this); | |
| 3081 | |
| 3082 if (prio == NoPriority) { | |
| 3083 prio = java_lang_Thread::priority(thread_oop()); | |
| 3084 assert(prio != NoPriority, "A valid priority should be present"); | |
| 3085 } | |
| 3086 | |
| 3087 // Push the Java priority down to the native thread; needs Threads_lock | |
| 3088 Thread::set_priority(this, prio); | |
| 3089 | |
| 3090 // Add the new thread to the Threads list and set it in motion. | |
| 3091 // We must have threads lock in order to call Threads::add. | |
| 3092 // It is crucial that we do not block before the thread is | |
| 3093 // added to the Threads list for if a GC happens, then the java_thread oop | |
| 3094 // will not be visited by GC. | |
| 3095 Threads::add(this); | |
| 3096 } | |
| 3097 | |
| 3098 oop JavaThread::current_park_blocker() { | |
| 3099 // Support for JSR-166 locks | |
| 3100 oop thread_oop = threadObj(); | |
| 242 | 3101 if (thread_oop != NULL && |
| 3102 JDK_Version::current().supports_thread_park_blocker()) { | |
| 0 | 3103 return java_lang_Thread::park_blocker(thread_oop); |
| 3104 } | |
| 3105 return NULL; | |
| 3106 } | |
| 3107 | |
| 3108 | |
| 3109 void JavaThread::print_stack_on(outputStream* st) { | |
| 3110 if (!has_last_Java_frame()) return; | |
| 3111 ResourceMark rm; | |
| 3112 HandleMark hm; | |
| 3113 | |
| 3114 RegisterMap reg_map(this); | |
| 3115 vframe* start_vf = last_java_vframe(®_map); | |
| 3116 int count = 0; | |
| 3117 for (vframe* f = start_vf; f; f = f->sender() ) { | |
| 3118 if (f->is_java_frame()) { | |
| 3119 javaVFrame* jvf = javaVFrame::cast(f); | |
| 3120 java_lang_Throwable::print_stack_element(st, jvf->method(), jvf->bci()); | |
| 3121 | |
| 3122 // Print out lock information | |
| 3123 if (JavaMonitorsInStackTrace) { | |
| 3124 jvf->print_lock_info_on(st, count); | |
| 3125 } | |
| 3126 } else { | |
| 3127 // Ignore non-Java frames | |
| 3128 } | |
| 3129 | |
| 3130 // Bail-out case for too deep stacks | |
| 3131 count++; | |
| 3132 if (MaxJavaStackTraceDepth == count) return; | |
| 3133 } | |
| 3134 } | |
| 3135 | |
| 3136 | |
| 3137 // JVMTI PopFrame support | |
| 3138 void JavaThread::popframe_preserve_args(ByteSize size_in_bytes, void* start) { | |
| 3139 assert(_popframe_preserved_args == NULL, "should not wipe out old PopFrame preserved arguments"); | |
| 3140 if (in_bytes(size_in_bytes) != 0) { | |
| 6197 | 3141 _popframe_preserved_args = NEW_C_HEAP_ARRAY(char, in_bytes(size_in_bytes), mtThread); |
| 0 | 3142 _popframe_preserved_args_size = in_bytes(size_in_bytes); |
|
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6730276: JDI_REGRESSION tests fail with "Error: count must be non-zero" error on x86
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1584
diff
changeset
|
3143 Copy::conjoint_jbytes(start, _popframe_preserved_args, _popframe_preserved_args_size); |
| 0 | 3144 } |
| 3145 } | |
| 3146 | |
| 3147 void* JavaThread::popframe_preserved_args() { | |
| 3148 return _popframe_preserved_args; | |
| 3149 } | |
| 3150 | |
| 3151 ByteSize JavaThread::popframe_preserved_args_size() { | |
| 3152 return in_ByteSize(_popframe_preserved_args_size); | |
| 3153 } | |
| 3154 | |
| 3155 WordSize JavaThread::popframe_preserved_args_size_in_words() { | |
| 3156 int sz = in_bytes(popframe_preserved_args_size()); | |
| 3157 assert(sz % wordSize == 0, "argument size must be multiple of wordSize"); | |
| 3158 return in_WordSize(sz / wordSize); | |
| 3159 } | |
| 3160 | |
| 3161 void JavaThread::popframe_free_preserved_args() { | |
| 3162 assert(_popframe_preserved_args != NULL, "should not free PopFrame preserved arguments twice"); | |
| 6197 | 3163 FREE_C_HEAP_ARRAY(char, (char*) _popframe_preserved_args, mtThread); |
| 0 | 3164 _popframe_preserved_args = NULL; |
| 3165 _popframe_preserved_args_size = 0; | |
| 3166 } | |
| 3167 | |
| 3168 #ifndef PRODUCT | |
| 3169 | |
| 3170 void JavaThread::trace_frames() { | |
| 3171 tty->print_cr("[Describe stack]"); | |
| 3172 int frame_no = 1; | |
| 3173 for(StackFrameStream fst(this); !fst.is_done(); fst.next()) { | |
| 3174 tty->print(" %d. ", frame_no++); | |
| 3175 fst.current()->print_value_on(tty,this); | |
| 3176 tty->cr(); | |
| 3177 } | |
| 3178 } | |
| 3179 | |
|
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diff
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|
3180 class PrintAndVerifyOopClosure: public OopClosure { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3181 protected: |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3182 template <class T> inline void do_oop_work(T* p) { |
|
7588156f5cf9
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diff
changeset
|
3183 oop obj = oopDesc::load_decode_heap_oop(p); |
|
7588156f5cf9
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|
3184 if (obj == NULL) return; |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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3899
diff
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|
3185 tty->print(INTPTR_FORMAT ": ", p); |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3186 if (obj->is_oop_or_null()) { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
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|
3187 if (obj->is_objArray()) { |
|
7588156f5cf9
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3899
diff
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|
3188 tty->print_cr("valid objArray: " INTPTR_FORMAT, (oopDesc*) obj); |
|
7588156f5cf9
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diff
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|
3189 } else { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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3899
diff
changeset
|
3190 obj->print(); |
|
7588156f5cf9
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3899
diff
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|
3191 } |
|
7588156f5cf9
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3899
diff
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|
3192 } else { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
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|
3193 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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|
3194 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
changeset
|
3195 tty->cr(); |
|
7588156f5cf9
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3899
diff
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|
3196 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
changeset
|
3197 public: |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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parents:
3899
diff
changeset
|
3198 virtual void do_oop(oop* p) { do_oop_work(p); } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
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diff
changeset
|
3199 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
|
3200 }; |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3201 |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3202 |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3203 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
|
3204 PrintAndVerifyOopClosure print; |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3205 f->print_value(); |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3206 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
|
3207 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3208 |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3209 // 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
|
3210 // 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
|
3211 // 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
|
3212 // oldest. |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3213 void JavaThread::trace_oops() { |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3214 tty->print_cr("[Trace oops]"); |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3215 frames_do(oops_print); |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3216 } |
|
7588156f5cf9
7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244)
never
parents:
3899
diff
changeset
|
3217 |
| 0 | 3218 |
|
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3219 #ifdef ASSERT |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3220 // 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
|
3221 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
|
3222 ResourceMark rm; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3223 PRESERVE_EXCEPTION_MARK; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3224 FrameValues values; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3225 int frame_no = 0; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3226 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
|
3227 fst.current()->describe(values, ++frame_no); |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3228 if (depth == frame_no) break; |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3229 } |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3230 if (validate_only) { |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3231 values.validate(); |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3232 } else { |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3233 tty->print_cr("[Describe stack layout]"); |
|
4042
b20d64f83668
7090904: JSR 292: JRuby junit test crashes in PSScavengeRootsClosure::do_oop
twisti
parents:
4007
diff
changeset
|
3234 values.print(this); |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3235 } |
|
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3236 } |
|
3388
a80577f854f9
7045513: JSR 292 inlining causes crashes in methodHandleWalk.cpp
never
parents:
3384
diff
changeset
|
3237 #endif |
|
3336
2e038ad0c1d0
7009361: JSR 292 Invalid value on stack on solaris-sparc with -Xcomp
never
parents:
2416
diff
changeset
|
3238 |
| 0 | 3239 void JavaThread::trace_stack_from(vframe* start_vf) { |
| 3240 ResourceMark rm; | |
| 3241 int vframe_no = 1; | |
| 3242 for (vframe* f = start_vf; f; f = f->sender() ) { | |
| 3243 if (f->is_java_frame()) { | |
| 3244 javaVFrame::cast(f)->print_activation(vframe_no++); | |
| 3245 } else { | |
| 3246 f->print(); | |
| 3247 } | |
| 3248 if (vframe_no > StackPrintLimit) { | |
| 3249 tty->print_cr("...<more frames>..."); | |
| 3250 return; | |
| 3251 } | |
| 3252 } | |
| 3253 } | |
| 3254 | |
| 3255 | |
| 3256 void JavaThread::trace_stack() { | |
| 3257 if (!has_last_Java_frame()) return; | |
| 3258 ResourceMark rm; | |
| 3259 HandleMark hm; | |
| 3260 RegisterMap reg_map(this); | |
| 3261 trace_stack_from(last_java_vframe(®_map)); | |
| 3262 } | |
| 3263 | |
| 3264 | |
| 3265 #endif // PRODUCT | |
| 3266 | |
| 3267 | |
| 3268 javaVFrame* JavaThread::last_java_vframe(RegisterMap *reg_map) { | |
| 3269 assert(reg_map != NULL, "a map must be given"); | |
| 3270 frame f = last_frame(); | |
| 3271 for (vframe* vf = vframe::new_vframe(&f, reg_map, this); vf; vf = vf->sender() ) { | |
| 3272 if (vf->is_java_frame()) return javaVFrame::cast(vf); | |
| 3273 } | |
| 3274 return NULL; | |
| 3275 } | |
| 3276 | |
| 3277 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3278 Klass* JavaThread::security_get_caller_class(int depth) { |
| 0 | 3279 vframeStream vfst(this); |
| 3280 vfst.security_get_caller_frame(depth); | |
| 3281 if (!vfst.at_end()) { | |
| 3282 return vfst.method()->method_holder(); | |
| 3283 } | |
| 3284 return NULL; | |
| 3285 } | |
| 3286 | |
| 3287 static void compiler_thread_entry(JavaThread* thread, TRAPS) { | |
| 3288 assert(thread->is_Compiler_thread(), "must be compiler thread"); | |
| 3289 CompileBroker::compiler_thread_loop(); | |
| 3290 } | |
| 3291 | |
| 3292 // Create a CompilerThread | |
| 3293 CompilerThread::CompilerThread(CompileQueue* queue, CompilerCounters* counters) | |
| 3294 : JavaThread(&compiler_thread_entry) { | |
| 3295 _env = NULL; | |
| 3296 _log = NULL; | |
| 3297 _task = NULL; | |
| 3298 _queue = queue; | |
| 3299 _counters = counters; | |
| 1584 | 3300 _buffer_blob = NULL; |
|
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3301 _scanned_nmethod = NULL; |
|
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3302 _compiler = NULL; |
| 0 | 3303 |
| 3304 #ifndef PRODUCT | |
| 3305 _ideal_graph_printer = NULL; | |
| 3306 #endif | |
| 3307 } | |
| 3308 | |
|
7179
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3309 void CompilerThread::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
|
d0aa87f04bd5
8003720: NPG: Method in interpreter stack frame can be deallocated
stefank
parents:
7177
diff
changeset
|
3310 JavaThread::oops_do(f, cld_f, cf); |
|
3384
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3311 if (_scanned_nmethod != NULL && cf != NULL) { |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3312 // 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
|
3313 // 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
|
3314 // a scan. |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3315 cf->do_code_blob(_scanned_nmethod); |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3316 } |
|
f52ed367b66d
6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify
never
parents:
3336
diff
changeset
|
3317 } |
| 0 | 3318 |
|
12880
469216acdb28
8023014: CodeSweeperSweepNoFlushTest.java fails with HS crash
anoll
parents:
12316
diff
changeset
|
3319 |
| 0 | 3320 // ======= Threads ======== |
| 3321 | |
| 3322 // The Threads class links together all active threads, and provides | |
| 3323 // operations over all threads. It is protected by its own Mutex | |
| 3324 // lock, which is also used in other contexts to protect thread | |
| 3325 // operations from having the thread being operated on from exiting | |
| 3326 // and going away unexpectedly (e.g., safepoint synchronization) | |
| 3327 | |
| 3328 JavaThread* Threads::_thread_list = NULL; | |
| 3329 int Threads::_number_of_threads = 0; | |
| 3330 int Threads::_number_of_non_daemon_threads = 0; | |
| 3331 int Threads::_return_code = 0; | |
| 3332 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
|
3333 #ifdef ASSERT |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3334 bool Threads::_vm_complete = false; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3335 #endif |
| 0 | 3336 |
| 3337 // All JavaThreads | |
| 3338 #define ALL_JAVA_THREADS(X) for (JavaThread* X = _thread_list; X; X = X->next()) | |
| 3339 | |
| 3340 // All JavaThreads + all non-JavaThreads (i.e., every thread in the system) | |
| 3341 void Threads::threads_do(ThreadClosure* tc) { | |
| 3342 assert_locked_or_safepoint(Threads_lock); | |
| 3343 // ALL_JAVA_THREADS iterates through all JavaThreads | |
| 3344 ALL_JAVA_THREADS(p) { | |
| 3345 tc->do_thread(p); | |
| 3346 } | |
| 3347 // Someday we could have a table or list of all non-JavaThreads. | |
| 3348 // For now, just manually iterate through them. | |
| 3349 tc->do_thread(VMThread::vm_thread()); | |
| 3350 Universe::heap()->gc_threads_do(tc); | |
|
323
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3351 WatcherThread *wt = WatcherThread::watcher_thread(); |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3352 // 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
|
3353 // 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
|
3354 // 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
|
3355 // 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
|
3356 // way to prevent termination of WatcherThread would be to acquire |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3357 // 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
|
3358 // checking in some cases. |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3359 if (wt != NULL) |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3360 tc->do_thread(wt); |
|
b33eef719520
6740526: sun/management/HotspotThreadMBean/GetInternalThreads.java test failed
xlu
parents:
286
diff
changeset
|
3361 |
| 0 | 3362 // If CompilerThreads ever become non-JavaThreads, add them here |
| 3363 } | |
| 3364 | |
| 3365 jint Threads::create_vm(JavaVMInitArgs* args, bool* canTryAgain) { | |
| 3366 | |
| 242 | 3367 extern void JDK_Version_init(); |
| 3368 | |
| 0 | 3369 // Check version |
| 3370 if (!is_supported_jni_version(args->version)) return JNI_EVERSION; | |
| 3371 | |
| 3372 // Initialize the output stream module | |
| 3373 ostream_init(); | |
| 3374 | |
| 3375 // Process java launcher properties. | |
| 3376 Arguments::process_sun_java_launcher_properties(args); | |
| 3377 | |
| 3378 // Initialize the os module before using TLS | |
| 3379 os::init(); | |
| 3380 | |
| 3381 // Initialize system properties. | |
| 3382 Arguments::init_system_properties(); | |
| 3383 | |
| 242 | 3384 // So that JDK version can be used as a discrimintor when parsing arguments |
| 3385 JDK_Version_init(); | |
| 3386 | |
|
1864
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3387 // Update/Initialize System properties after JDK version number is known |
|
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3388 Arguments::init_version_specific_system_properties(); |
|
dfb38ea7da17
6988363: Rebrand vm vendor property settings (jdk7 only)
zgu
parents:
1731
diff
changeset
|
3389 |
| 0 | 3390 // Parse arguments |
| 3391 jint parse_result = Arguments::parse(args); | |
| 3392 if (parse_result != JNI_OK) return parse_result; | |
| 3393 | |
|
13114
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
3394 // Probe for existance of supported GPU and initialize it if one |
|
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
3395 // exists. |
|
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
3396 gpu::init(); |
|
5465ba051280
HSAIL: removed AMD GPU detection until a) clashing AMD CPU and GPU vendor ID issue is resolved and b) HSA port is more complete
Doug Simon <doug.simon@oracle.com>
parents:
13089
diff
changeset
|
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 | |
| 3430 // Bootstrap native memory tracking, so it can start recording memory | |
| 3431 // activities before worker thread is started. This is the first phase | |
| 3432 // of bootstrapping, VM is currently running in single-thread mode. | |
| 3433 MemTracker::bootstrap_single_thread(); | |
| 3434 | |
| 0 | 3435 // Initialize output stream logging |
| 3436 ostream_init_log(); | |
| 3437 | |
| 3438 // Convert -Xrun to -agentlib: if there is no JVM_OnLoad | |
| 3439 // Must be before create_vm_init_agents() | |
| 3440 if (Arguments::init_libraries_at_startup()) { | |
| 3441 convert_vm_init_libraries_to_agents(); | |
| 3442 } | |
| 3443 | |
| 3444 // Launch -agentlib/-agentpath and converted -Xrun agents | |
| 3445 if (Arguments::init_agents_at_startup()) { | |
| 3446 create_vm_init_agents(); | |
| 3447 } | |
| 3448 | |
| 3449 // Initialize Threads state | |
| 3450 _thread_list = NULL; | |
| 3451 _number_of_threads = 0; | |
| 3452 _number_of_non_daemon_threads = 0; | |
| 3453 | |
| 3454 // Initialize global data structures and create system classes in heap | |
| 3455 vm_init_globals(); | |
| 3456 | |
| 3457 // Attach the main thread to this os thread | |
| 3458 JavaThread* main_thread = new JavaThread(); | |
| 3459 main_thread->set_thread_state(_thread_in_vm); | |
| 3460 // must do this before set_active_handles and initialize_thread_local_storage | |
| 3461 // Note: on solaris initialize_thread_local_storage() will (indirectly) | |
| 3462 // change the stack size recorded here to one based on the java thread | |
| 3463 // stacksize. This adjusted size is what is used to figure the placement | |
| 3464 // of the guard pages. | |
| 3465 main_thread->record_stack_base_and_size(); | |
| 3466 main_thread->initialize_thread_local_storage(); | |
| 3467 | |
| 3468 main_thread->set_active_handles(JNIHandleBlock::allocate_block()); | |
| 3469 | |
| 3470 if (!main_thread->set_as_starting_thread()) { | |
| 3471 vm_shutdown_during_initialization( | |
| 3472 "Failed necessary internal allocation. Out of swap space"); | |
| 3473 delete main_thread; | |
| 3474 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
| 3475 return JNI_ENOMEM; | |
| 3476 } | |
| 3477 | |
| 3478 // Enable guard page *after* os::create_main_thread(), otherwise it would | |
| 3479 // crash Linux VM, see notes in os_linux.cpp. | |
| 3480 main_thread->create_stack_guard_pages(); | |
| 3481 | |
| 1878 | 3482 // Initialize Java-Level synchronization subsystem |
| 3483 ObjectMonitor::Initialize() ; | |
| 0 | 3484 |
| 6197 | 3485 // Second phase of bootstrapping, VM is about entering multi-thread mode |
| 3486 MemTracker::bootstrap_multi_thread(); | |
| 3487 | |
| 0 | 3488 // Initialize global modules |
| 3489 jint status = init_globals(); | |
| 3490 if (status != JNI_OK) { | |
| 3491 delete main_thread; | |
| 3492 *canTryAgain = false; // don't let caller call JNI_CreateJavaVM again | |
| 3493 return status; | |
| 3494 } | |
| 3495 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3496 // Should be done after the heap is fully created |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3497 main_thread->cache_global_variables(); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3498 |
| 0 | 3499 HandleMark hm; |
| 3500 | |
| 3501 { MutexLocker mu(Threads_lock); | |
| 3502 Threads::add(main_thread); | |
| 3503 } | |
| 3504 | |
| 3505 // Any JVMTI raw monitors entered in onload will transition into | |
| 3506 // real raw monitor. VM is setup enough here for raw monitor enter. | |
| 3507 JvmtiExport::transition_pending_onload_raw_monitors(); | |
| 3508 | |
| 6197 | 3509 // Fully start NMT |
| 3510 MemTracker::start(); | |
| 3511 | |
| 0 | 3512 // Create the VMThread |
| 3513 { TraceTime timer("Start VMThread", TraceStartupTime); | |
| 3514 VMThread::create(); | |
| 3515 Thread* vmthread = VMThread::vm_thread(); | |
| 3516 | |
| 3517 if (!os::create_thread(vmthread, os::vm_thread)) | |
| 3518 vm_exit_during_initialization("Cannot create VM thread. Out of system resources."); | |
| 3519 | |
| 3520 // Wait for the VM thread to become ready, and VMThread::run to initialize | |
| 3521 // Monitors can have spurious returns, must always check another state flag | |
| 3522 { | |
| 3523 MutexLocker ml(Notify_lock); | |
| 3524 os::start_thread(vmthread); | |
| 3525 while (vmthread->active_handles() == NULL) { | |
| 3526 Notify_lock->wait(); | |
| 3527 } | |
| 3528 } | |
| 3529 } | |
| 3530 | |
| 3531 assert (Universe::is_fully_initialized(), "not initialized"); | |
|
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3532 if (VerifyDuringStartup) { |
|
10186
b06ac540229e
8013132: Add a flag to turn off the output of the verbose verification code
stefank
parents:
9071
diff
changeset
|
3533 // 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
|
3534 VM_Verify verify_op; |
|
9071
68fe50d4f1d5
8011343: Add new flag for verifying the heap during startup
johnc
parents:
8855
diff
changeset
|
3535 VMThread::execute(&verify_op); |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3536 } |
|
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8793
diff
changeset
|
3537 |
| 0 | 3538 EXCEPTION_MARK; |
| 3539 | |
| 3540 // At this point, the Universe is initialized, but we have not executed | |
| 3541 // any byte code. Now is a good time (the only time) to dump out the | |
| 3542 // internal state of the JVM for sharing. | |
| 3543 if (DumpSharedSpaces) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3544 MetaspaceShared::preload_and_dump(CHECK_0); |
| 0 | 3545 ShouldNotReachHere(); |
| 3546 } | |
| 3547 | |
| 3548 // Always call even when there are not JVMTI environments yet, since environments | |
| 3549 // may be attached late and JVMTI must track phases of VM execution | |
| 3550 JvmtiExport::enter_start_phase(); | |
| 3551 | |
| 3552 // Notify JVMTI agents that VM has started (JNI is up) - nop if no agents. | |
| 3553 JvmtiExport::post_vm_start(); | |
| 3554 | |
| 3555 { | |
| 3556 TraceTime timer("Initialize java.lang classes", TraceStartupTime); | |
| 3557 | |
| 3558 if (EagerXrunInit && Arguments::init_libraries_at_startup()) { | |
| 3559 create_vm_init_libraries(); | |
| 3560 } | |
| 3561 | |
| 7608 | 3562 initialize_class(vmSymbols::java_lang_String(), CHECK_0); |
| 0 | 3563 |
| 3564 // Initialize java_lang.System (needed before creating the thread) | |
| 7608 | 3565 initialize_class(vmSymbols::java_lang_System(), CHECK_0); |
| 3566 initialize_class(vmSymbols::java_lang_ThreadGroup(), CHECK_0); | |
| 3567 Handle thread_group = create_initial_thread_group(CHECK_0); | |
| 3568 Universe::set_main_thread_group(thread_group()); | |
| 3569 initialize_class(vmSymbols::java_lang_Thread(), CHECK_0); | |
| 3570 oop thread_object = create_initial_thread(thread_group, main_thread, CHECK_0); | |
| 3571 main_thread->set_threadObj(thread_object); | |
| 3572 // Set thread status to running since main thread has | |
| 3573 // been started and running. | |
| 3574 java_lang_Thread::set_thread_status(thread_object, | |
| 3575 java_lang_Thread::RUNNABLE); | |
| 3576 | |
| 3577 // The VM creates & returns objects of this class. Make sure it's initialized. | |
| 3578 initialize_class(vmSymbols::java_lang_Class(), CHECK_0); | |
| 3579 | |
| 3580 // The VM preresolves methods to these classes. Make sure that they get initialized | |
| 3581 initialize_class(vmSymbols::java_lang_reflect_Method(), CHECK_0); | |
| 3582 initialize_class(vmSymbols::java_lang_ref_Finalizer(), CHECK_0); | |
| 3583 call_initializeSystemClass(CHECK_0); | |
| 3584 | |
| 3585 // get the Java runtime name after java.lang.System is initialized | |
| 3586 JDK_Version::set_runtime_name(get_java_runtime_name(THREAD)); | |
| 3587 JDK_Version::set_runtime_version(get_java_runtime_version(THREAD)); | |
| 0 | 3588 |
| 3589 // an instance of OutOfMemory exception has been allocated earlier | |
| 7608 | 3590 initialize_class(vmSymbols::java_lang_OutOfMemoryError(), CHECK_0); |
| 3591 initialize_class(vmSymbols::java_lang_NullPointerException(), CHECK_0); | |
| 3592 initialize_class(vmSymbols::java_lang_ClassCastException(), CHECK_0); | |
| 3593 initialize_class(vmSymbols::java_lang_ArrayStoreException(), CHECK_0); | |
| 3594 initialize_class(vmSymbols::java_lang_ArithmeticException(), CHECK_0); | |
| 3595 initialize_class(vmSymbols::java_lang_StackOverflowError(), CHECK_0); | |
| 3596 initialize_class(vmSymbols::java_lang_IllegalMonitorStateException(), CHECK_0); | |
| 3597 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
|
3598 } |
| 0 | 3599 |
| 3600 // See : bugid 4211085. | |
| 3601 // Background : the static initializer of java.lang.Compiler tries to read | |
| 3602 // property"java.compiler" and read & write property "java.vm.info". | |
| 3603 // When a security manager is installed through the command line | |
| 3604 // option "-Djava.security.manager", the above properties are not | |
| 3605 // readable and the static initializer for java.lang.Compiler fails | |
| 3606 // resulting in a NoClassDefFoundError. This can happen in any | |
| 3607 // user code which calls methods in java.lang.Compiler. | |
| 3608 // Hack : the hack is to pre-load and initialize this class, so that only | |
| 3609 // system domains are on the stack when the properties are read. | |
| 3610 // Currently even the AWT code has calls to methods in java.lang.Compiler. | |
| 3611 // On the classic VM, java.lang.Compiler is loaded very early to load the JIT. | |
| 3612 // Future Fix : the best fix is to grant everyone permissions to read "java.compiler" and | |
| 3613 // read and write"java.vm.info" in the default policy file. See bugid 4211383 | |
| 3614 // 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
|
3615 initialize_class(vmSymbols::java_lang_Compiler(), CHECK_0); |
| 0 | 3616 |
| 3617 // More hackery - the static initializer of java.lang.Compiler adds the string "nojit" to | |
| 3618 // the java.vm.info property if no jit gets loaded through java.lang.Compiler (the hotspot | |
| 3619 // compiler does not get loaded through java.lang.Compiler). "java -version" with the | |
| 3620 // hotspot vm says "nojit" all the time which is confusing. So, we reset it here. | |
| 3621 // This should also be taken out as soon as 4211383 gets fixed. | |
| 3622 reset_vm_info_property(CHECK_0); | |
| 3623 | |
| 3624 quicken_jni_functions(); | |
| 3625 | |
|
4932
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3626 // Must be run after init_ft which initializes ft_enabled |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3627 if (TRACE_INITIALIZE() != JNI_OK) { |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3628 vm_exit_during_initialization("Failed to initialize tracing backend"); |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3629 } |
|
f1cb6f9cfe21
7145243: Need additional specializations for argument parsing framework
fparain
parents:
4873
diff
changeset
|
3630 |
| 0 | 3631 // Set flag that basic initialization has completed. Used by exceptions and various |
| 3632 // debug stuff, that does not work until all basic classes have been initialized. | |
| 3633 set_init_completed(); | |
| 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 |
| 3705 // initialize compiler(s) | |
|
7212
291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
Doug Simon <doug.simon@oracle.com>
diff
changeset
|
3706 #if defined(COMPILER1) || defined(COMPILER2) || defined(SHARK) || defined(GRAALVM) |
| 0 | 3707 CompileBroker::compilation_init(); |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3708 #endif |
|
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3709 |
|
12163
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3710 if (EnableInvokeDynamic) { |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3711 // 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
|
3712 // 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
|
3713 // signature polymorphic MH intrinsics can be missed |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3714 // (see SystemDictionary::find_method_handle_intrinsic). |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3715 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
|
3716 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
|
3717 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
|
3718 } |
|
74608df95ba3
8022595: JSR292: deadlock during class loading of MethodHandles, MethodHandleImpl & MethodHandleNatives
vlivanov
parents:
11154
diff
changeset
|
3719 |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3720 #if INCLUDE_MANAGEMENT |
| 0 | 3721 Management::initialize(THREAD); |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3722 #endif // INCLUDE_MANAGEMENT |
|
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3723 |
| 0 | 3724 if (HAS_PENDING_EXCEPTION) { |
| 3725 // management agent fails to start possibly due to | |
| 3726 // configuration problem and is responsible for printing | |
| 3727 // stack trace if appropriate. Simply exit VM. | |
| 3728 vm_exit(1); | |
| 3729 } | |
| 3730 | |
| 3731 if (Arguments::has_profile()) FlatProfiler::engage(main_thread, true); | |
| 3732 if (MemProfiling) MemProfiler::engage(); | |
| 3733 StatSampler::engage(); | |
| 3734 if (CheckJNICalls) JniPeriodicChecker::engage(); | |
| 3735 | |
| 3736 BiasedLocking::init(); | |
| 3737 | |
|
2129
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3738 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
|
3739 call_postVMInitHook(THREAD); |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3740 // 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
|
3741 // exceptions and provide means of diagnosis. |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3742 if (HAS_PENDING_EXCEPTION) { |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3743 CLEAR_PENDING_EXCEPTION; |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3744 } |
|
8f8dfba37802
6994753: Implement optional hook to a Java method at VM startup.
kevinw
parents:
2126
diff
changeset
|
3745 } |
| 0 | 3746 |
|
6939
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3747 { |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3748 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
|
3749 // 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
|
3750 // or by dynamic enrollment. |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3751 WatcherThread::make_startable(); |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3752 // 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
|
3753 // 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
|
3754 // 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
|
3755 // 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
|
3756 if (PeriodicTask::num_tasks() > 0) { |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3757 WatcherThread::start(); |
|
c284cf4781f0
7127792: Add the ability to change an existing PeriodicTask's execution interval
rbackman
parents:
6921
diff
changeset
|
3758 } |
| 0 | 3759 } |
| 3760 | |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3761 // Give os specific code one last chance to start |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3762 os::init_3(); |
|
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
1608
diff
changeset
|
3763 |
| 0 | 3764 create_vm_timer.end(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3765 #ifdef ASSERT |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3766 _vm_complete = true; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6198
diff
changeset
|
3767 #endif |
| 0 | 3768 return JNI_OK; |
| 3769 } | |
| 3770 | |
| 3771 // type for the Agent_OnLoad and JVM_OnLoad entry points | |
| 3772 extern "C" { | |
| 3773 typedef jint (JNICALL *OnLoadEntry_t)(JavaVM *, char *, void *); | |
| 3774 } | |
| 3775 // Find a command line agent library and return its entry point for | |
| 3776 // -agentlib: -agentpath: -Xrun | |
| 3777 // num_symbol_entries must be passed-in since only the caller knows the number of symbols in the array. | |
| 3778 static OnLoadEntry_t lookup_on_load(AgentLibrary* agent, const char *on_load_symbols[], size_t num_symbol_entries) { | |
| 3779 OnLoadEntry_t on_load_entry = NULL; | |
|
12117
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8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
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diff
changeset
|
3780 void *library = NULL; |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
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11154
diff
changeset
|
3781 |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
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11154
diff
changeset
|
3782 if (!agent->valid()) { |
| 0 | 3783 char buffer[JVM_MAXPATHLEN]; |
| 3784 char ebuf[1024]; | |
| 3785 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
|
3786 const char *msg = "Could not find agent library "; |
| 0 | 3787 |
| 12220 | 3788 // First check to see if agent is statically linked into executable |
|
12117
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8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3789 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
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11154
diff
changeset
|
3790 library = agent->os_lib(); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
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11154
diff
changeset
|
3791 } else if (agent->is_absolute_path()) { |
|
1980
828eafbd85cc
6348631: remove the use of the HPI library from Hotspot
ikrylov
parents:
1972
diff
changeset
|
3792 library = os::dll_load(name, ebuf, sizeof ebuf); |
| 0 | 3793 if (library == NULL) { |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3794 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
|
3795 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
| 6197 | 3796 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
|
3797 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
| 0 | 3798 // 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
|
3799 vm_exit_during_initialization(buf, NULL); |
| 6197 | 3800 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
| 0 | 3801 } |
| 3802 } else { | |
| 3803 // 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
|
3804 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
|
3805 name)) { |
|
6cb0d32b828b
8001185: parsing of sun.boot.library.path in os::dll_build_name somewhat broken
bpittore
parents:
6921
diff
changeset
|
3806 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
|
3807 } |
| 0 | 3808 if (library == NULL) { // Try the local directory |
| 3809 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
|
3810 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
|
3811 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
|
3812 } |
| 0 | 3813 if (library == NULL) { |
|
1694
ab3fd720516c
6378314: Bad warning message when agent library not found. local directory is not searched.
rasbold
parents:
1681
diff
changeset
|
3814 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
|
3815 size_t len = strlen(msg) + strlen(name) + strlen(sub_msg) + strlen(ebuf) + 1; |
| 6197 | 3816 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
|
3817 jio_snprintf(buf, len, "%s%s%s%s", msg, name, sub_msg, ebuf); |
| 0 | 3818 // 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
|
3819 vm_exit_during_initialization(buf, NULL); |
| 6197 | 3820 FREE_C_HEAP_ARRAY(char, buf, mtThread); |
| 0 | 3821 } |
| 3822 } | |
| 3823 } | |
| 3824 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
|
3825 agent->set_valid(); |
| 0 | 3826 } |
| 3827 | |
| 3828 // Find the OnLoad function. | |
|
12117
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3829 on_load_entry = |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3830 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
|
3831 false, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3832 on_load_symbols, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3833 num_symbol_entries)); |
| 0 | 3834 return on_load_entry; |
| 3835 } | |
| 3836 | |
| 3837 // Find the JVM_OnLoad entry point | |
| 3838 static OnLoadEntry_t lookup_jvm_on_load(AgentLibrary* agent) { | |
| 3839 const char *on_load_symbols[] = JVM_ONLOAD_SYMBOLS; | |
| 3840 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
| 3841 } | |
| 3842 | |
| 3843 // Find the Agent_OnLoad entry point | |
| 3844 static OnLoadEntry_t lookup_agent_on_load(AgentLibrary* agent) { | |
| 3845 const char *on_load_symbols[] = AGENT_ONLOAD_SYMBOLS; | |
| 3846 return lookup_on_load(agent, on_load_symbols, sizeof(on_load_symbols) / sizeof(char*)); | |
| 3847 } | |
| 3848 | |
| 3849 // For backwards compatibility with -Xrun | |
| 3850 // Convert libraries with no JVM_OnLoad, but which have Agent_OnLoad to be | |
| 3851 // treated like -agentpath: | |
| 3852 // Must be called before agent libraries are created | |
| 3853 void Threads::convert_vm_init_libraries_to_agents() { | |
| 3854 AgentLibrary* agent; | |
| 3855 AgentLibrary* next; | |
| 3856 | |
| 3857 for (agent = Arguments::libraries(); agent != NULL; agent = next) { | |
| 3858 next = agent->next(); // cache the next agent now as this agent may get moved off this list | |
| 3859 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
| 3860 | |
| 3861 // If there is an JVM_OnLoad function it will get called later, | |
| 3862 // otherwise see if there is an Agent_OnLoad | |
| 3863 if (on_load_entry == NULL) { | |
| 3864 on_load_entry = lookup_agent_on_load(agent); | |
| 3865 if (on_load_entry != NULL) { | |
| 3866 // switch it to the agent list -- so that Agent_OnLoad will be called, | |
| 3867 // JVM_OnLoad won't be attempted and Agent_OnUnload will | |
| 3868 Arguments::convert_library_to_agent(agent); | |
| 3869 } else { | |
| 3870 vm_exit_during_initialization("Could not find JVM_OnLoad or Agent_OnLoad function in the library", agent->name()); | |
| 3871 } | |
| 3872 } | |
| 3873 } | |
| 3874 } | |
| 3875 | |
| 3876 // Create agents for -agentlib: -agentpath: and converted -Xrun | |
| 3877 // Invokes Agent_OnLoad | |
| 3878 // Called very early -- before JavaThreads exist | |
| 3879 void Threads::create_vm_init_agents() { | |
| 3880 extern struct JavaVM_ main_vm; | |
| 3881 AgentLibrary* agent; | |
| 3882 | |
| 3883 JvmtiExport::enter_onload_phase(); | |
|
6854
fb19af007ffc
7189254: Change makefiles for more flexibility to override defaults
jprovino
parents:
6769
diff
changeset
|
3884 |
| 0 | 3885 for (agent = Arguments::agents(); agent != NULL; agent = agent->next()) { |
| 3886 OnLoadEntry_t on_load_entry = lookup_agent_on_load(agent); | |
| 3887 | |
| 3888 if (on_load_entry != NULL) { | |
| 3889 // Invoke the Agent_OnLoad function | |
| 3890 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
| 3891 if (err != JNI_OK) { | |
| 3892 vm_exit_during_initialization("agent library failed to init", agent->name()); | |
| 3893 } | |
| 3894 } else { | |
| 3895 vm_exit_during_initialization("Could not find Agent_OnLoad function in the agent library", agent->name()); | |
| 3896 } | |
| 3897 } | |
| 3898 JvmtiExport::enter_primordial_phase(); | |
| 3899 } | |
| 3900 | |
| 3901 extern "C" { | |
| 3902 typedef void (JNICALL *Agent_OnUnload_t)(JavaVM *); | |
| 3903 } | |
| 3904 | |
| 3905 void Threads::shutdown_vm_agents() { | |
| 3906 // Send any Agent_OnUnload notifications | |
| 3907 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
|
3908 size_t num_symbol_entries = ARRAY_SIZE(on_unload_symbols); |
| 0 | 3909 extern struct JavaVM_ main_vm; |
| 3910 for (AgentLibrary* agent = Arguments::agents(); agent != NULL; agent = agent->next()) { | |
| 3911 | |
| 3912 // 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
|
3913 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
|
3914 os::find_agent_function(agent, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3915 false, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3916 on_unload_symbols, |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3917 num_symbol_entries)); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3918 |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3919 // Invoke the Agent_OnUnload function |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3920 if (unload_entry != NULL) { |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3921 JavaThread* thread = JavaThread::current(); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3922 ThreadToNativeFromVM ttn(thread); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3923 HandleMark hm(thread); |
|
f92b82d454fa
8014135: The JVMTI specification does not conform to recent changes in JNI specification
bpittore
parents:
11154
diff
changeset
|
3924 (*unload_entry)(&main_vm); |
| 0 | 3925 } |
| 3926 } | |
| 3927 } | |
| 3928 | |
| 3929 // Called for after the VM is initialized for -Xrun libraries which have not been converted to agent libraries | |
| 3930 // Invokes JVM_OnLoad | |
| 3931 void Threads::create_vm_init_libraries() { | |
| 3932 extern struct JavaVM_ main_vm; | |
| 3933 AgentLibrary* agent; | |
| 3934 | |
| 3935 for (agent = Arguments::libraries(); agent != NULL; agent = agent->next()) { | |
| 3936 OnLoadEntry_t on_load_entry = lookup_jvm_on_load(agent); | |
| 3937 | |
| 3938 if (on_load_entry != NULL) { | |
| 3939 // Invoke the JVM_OnLoad function | |
| 3940 JavaThread* thread = JavaThread::current(); | |
| 3941 ThreadToNativeFromVM ttn(thread); | |
| 3942 HandleMark hm(thread); | |
| 3943 jint err = (*on_load_entry)(&main_vm, agent->options(), NULL); | |
| 3944 if (err != JNI_OK) { | |
| 3945 vm_exit_during_initialization("-Xrun library failed to init", agent->name()); | |
| 3946 } | |
| 3947 } else { | |
| 3948 vm_exit_during_initialization("Could not find JVM_OnLoad function in -Xrun library", agent->name()); | |
| 3949 } | |
| 3950 } | |
| 3951 } | |
| 3952 | |
| 3953 // Last thread running calls java.lang.Shutdown.shutdown() | |
| 3954 void JavaThread::invoke_shutdown_hooks() { | |
| 3955 HandleMark hm(this); | |
| 3956 | |
| 3957 // We could get here with a pending exception, if so clear it now. | |
| 3958 if (this->has_pending_exception()) { | |
| 3959 this->clear_pending_exception(); | |
| 3960 } | |
| 3961 | |
| 3962 EXCEPTION_MARK; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6198
diff
changeset
|
3963 Klass* k = |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3964 SystemDictionary::resolve_or_null(vmSymbols::java_lang_Shutdown(), |
| 0 | 3965 THREAD); |
| 3966 if (k != NULL) { | |
| 3967 // SystemDictionary::resolve_or_null will return null if there was | |
| 3968 // an exception. If we cannot load the Shutdown class, just don't | |
| 3969 // call Shutdown.shutdown() at all. This will mean the shutdown hooks | |
| 3970 // and finalizers (if runFinalizersOnExit is set) won't be run. | |
| 3971 // Note that if a shutdown hook was registered or runFinalizersOnExit | |
| 3972 // was called, the Shutdown class would have already been loaded | |
| 3973 // (Runtime.addShutdownHook and runFinalizersOnExit will load it). | |
| 3974 instanceKlassHandle shutdown_klass (THREAD, k); | |
| 3975 JavaValue result(T_VOID); | |
| 3976 JavaCalls::call_static(&result, | |
| 3977 shutdown_klass, | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3978 vmSymbols::shutdown_method_name(), |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2162
diff
changeset
|
3979 vmSymbols::void_method_signature(), |
| 0 | 3980 THREAD); |
| 3981 } | |
| 3982 CLEAR_PENDING_EXCEPTION; | |
| 3983 } | |
| 3984 | |
| 3985 // Threads::destroy_vm() is normally called from jni_DestroyJavaVM() when | |
| 3986 // the program falls off the end of main(). Another VM exit path is through | |
| 3987 // vm_exit() when the program calls System.exit() to return a value or when | |
| 3988 // there is a serious error in VM. The two shutdown paths are not exactly | |
| 3989 // the same, but they share Shutdown.shutdown() at Java level and before_exit() | |
| 3990 // and VM_Exit op at VM level. | |
| 3991 // | |
| 3992 // Shutdown sequence: | |
| 6197 | 3993 // + Shutdown native memory tracking if it is on |
| 0 | 3994 // + Wait until we are the last non-daemon thread to execute |
| 3995 // <-- every thing is still working at this moment --> | |
| 3996 // + Call java.lang.Shutdown.shutdown(), which will invoke Java level | |
| 3997 // shutdown hooks, run finalizers if finalization-on-exit | |
| 3998 // + Call before_exit(), prepare for VM exit | |
| 3999 // > run VM level shutdown hooks (they are registered through JVM_OnExit(), | |
| 4000 // currently the only user of this mechanism is File.deleteOnExit()) | |
| 4001 // > stop flat profiler, StatSampler, watcher thread, CMS threads, | |
| 4002 // post thread end and vm death events to JVMTI, | |
| 4003 // stop signal thread | |
| 4004 // + Call JavaThread::exit(), it will: | |
| 4005 // > release JNI handle blocks, remove stack guard pages | |
| 4006 // > remove this thread from Threads list | |
| 4007 // <-- no more Java code from this thread after this point --> | |
| 4008 // + Stop VM thread, it will bring the remaining VM to a safepoint and stop | |
| 4009 // the compiler threads at safepoint | |
| 4010 // <-- do not use anything that could get blocked by Safepoint --> | |
| 4011 // + Disable tracing at JNI/JVM barriers | |
| 4012 // + Set _vm_exited flag for threads that are still running native code | |
| 4013 // + Delete this thread | |
| 4014 // + Call exit_globals() | |
| 4015 // > deletes tty | |
| 4016 // > deletes PerfMemory resources | |
| 4017 // + Return to caller | |
| 4018 | |
| 4019 bool Threads::destroy_vm() { | |
| 4020 JavaThread* thread = JavaThread::current(); | |
| 4021 | |
|
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4022 #ifdef ASSERT |
|
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4023 _vm_complete = false; |
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4024 #endif |
| 0 | 4025 // Wait until we are the last non-daemon thread to execute |
| 4026 { MutexLocker nu(Threads_lock); | |
| 4027 while (Threads::number_of_non_daemon_threads() > 1 ) | |
| 4028 // This wait should make safepoint checks, wait without a timeout, | |
| 4029 // and wait as a suspend-equivalent condition. | |
| 4030 // | |
| 4031 // Note: If the FlatProfiler is running and this thread is waiting | |
| 4032 // for another non-daemon thread to finish, then the FlatProfiler | |
| 4033 // is waiting for the external suspend request on this thread to | |
| 4034 // complete. wait_for_ext_suspend_completion() will eventually | |
| 4035 // timeout, but that takes time. Making this wait a suspend- | |
| 4036 // equivalent condition solves that timeout problem. | |
| 4037 // | |
| 4038 Threads_lock->wait(!Mutex::_no_safepoint_check_flag, 0, | |
| 4039 Mutex::_as_suspend_equivalent_flag); | |
| 4040 } | |
| 4041 | |
| 4042 // Hang forever on exit if we are reporting an error. | |
| 4043 if (ShowMessageBoxOnError && is_error_reported()) { | |
| 4044 os::infinite_sleep(); | |
| 4045 } | |
|
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|
4046 os::wait_for_keypress_at_exit(); |
| 0 | 4047 |
| 4048 if (JDK_Version::is_jdk12x_version()) { | |
| 4049 // We are the last thread running, so check if finalizers should be run. | |
| 4050 // For 1.3 or later this is done in thread->invoke_shutdown_hooks() | |
| 4051 HandleMark rm(thread); | |
| 4052 Universe::run_finalizers_on_exit(); | |
| 4053 } else { | |
| 4054 // run Java level shutdown hooks | |
| 4055 thread->invoke_shutdown_hooks(); | |
| 4056 } | |
| 4057 | |
| 4058 before_exit(thread); | |
| 4059 | |
| 4060 thread->exit(true); | |
| 4061 | |
| 4062 // Stop VM thread. | |
| 4063 { | |
| 4064 // 4945125 The vm thread comes to a safepoint during exit. | |
| 4065 // GC vm_operations can get caught at the safepoint, and the | |
| 4066 // heap is unparseable if they are caught. Grab the Heap_lock | |
| 4067 // to prevent this. The GC vm_operations will not be able to | |
| 4068 // queue until after the vm thread is dead. | |
|
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4069 // After this point, we'll never emerge out of the safepoint before |
|
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4070 // the VM exits, so concurrent GC threads do not need to be explicitly |
|
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4071 // stopped; they remain inactive until the process exits. |
|
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4072 // Note: some concurrent G1 threads may be running during a safepoint, |
|
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4073 // but these will not be accessing the heap, just some G1-specific side |
|
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4074 // data structures that are not accessed by any other threads but them |
|
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4075 // after this point in a terminal safepoint. |
|
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|
4076 |
| 0 | 4077 MutexLocker ml(Heap_lock); |
| 4078 | |
| 4079 VMThread::wait_for_vm_thread_exit(); | |
| 4080 assert(SafepointSynchronize::is_at_safepoint(), "VM thread should exit at Safepoint"); | |
| 4081 VMThread::destroy(); | |
| 4082 } | |
| 4083 | |
| 4084 // clean up ideal graph printers | |
| 4085 #if defined(COMPILER2) && !defined(PRODUCT) | |
| 4086 IdealGraphPrinter::clean_up(); | |
| 4087 #endif | |
| 4088 | |
| 4089 // Now, all Java threads are gone except daemon threads. Daemon threads | |
| 4090 // running Java code or in VM are stopped by the Safepoint. However, | |
| 4091 // daemon threads executing native code are still running. But they | |
| 4092 // will be stopped at native=>Java/VM barriers. Note that we can't | |
| 4093 // simply kill or suspend them, as it is inherently deadlock-prone. | |
| 4094 | |
| 4095 #ifndef PRODUCT | |
| 4096 // disable function tracing at JNI/JVM barriers | |
| 4097 TraceJNICalls = false; | |
| 4098 TraceJVMCalls = false; | |
| 4099 TraceRuntimeCalls = false; | |
| 4100 #endif | |
| 4101 | |
| 4102 VM_Exit::set_vm_exited(); | |
| 4103 | |
| 4104 notify_vm_shutdown(); | |
| 4105 | |
| 4106 delete thread; | |
| 4107 | |
| 4108 // exit_globals() will delete tty | |
| 4109 exit_globals(); | |
| 4110 | |
| 4111 return true; | |
| 4112 } | |
| 4113 | |
| 4114 | |
| 4115 jboolean Threads::is_supported_jni_version_including_1_1(jint version) { | |
| 4116 if (version == JNI_VERSION_1_1) return JNI_TRUE; | |
| 4117 return is_supported_jni_version(version); | |
| 4118 } | |
| 4119 | |
| 4120 | |
| 4121 jboolean Threads::is_supported_jni_version(jint version) { | |
| 4122 if (version == JNI_VERSION_1_2) return JNI_TRUE; | |
| 4123 if (version == JNI_VERSION_1_4) return JNI_TRUE; | |
| 4124 if (version == JNI_VERSION_1_6) return JNI_TRUE; | |
|
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|
4125 if (version == JNI_VERSION_1_8) return JNI_TRUE; |
| 0 | 4126 return JNI_FALSE; |
| 4127 } | |
| 4128 | |
| 4129 | |
| 4130 void Threads::add(JavaThread* p, bool force_daemon) { | |
| 4131 // The threads lock must be owned at this point | |
| 4132 assert_locked_or_safepoint(Threads_lock); | |
|
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4133 |
|
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4134 // See the comment for this method in thread.hpp for its purpose and |
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|
4135 // why it is called here. |
|
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|
4136 p->initialize_queues(); |
| 0 | 4137 p->set_next(_thread_list); |
| 4138 _thread_list = p; | |
| 4139 _number_of_threads++; | |
| 4140 oop threadObj = p->threadObj(); | |
| 4141 bool daemon = true; | |
| 4142 // Bootstrapping problem: threadObj can be null for initial | |
| 4143 // JavaThread (or for threads attached via JNI) | |
| 4144 if ((!force_daemon) && (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj))) { | |
| 4145 _number_of_non_daemon_threads++; | |
| 4146 daemon = false; | |
| 4147 } | |
| 4148 | |
| 6197 | 4149 p->set_safepoint_visible(true); |
| 4150 | |
| 0 | 4151 ThreadService::add_thread(p, daemon); |
| 4152 | |
| 4153 // Possible GC point. | |
|
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|
4154 Events::log(p, "Thread added: " INTPTR_FORMAT, p); |
| 0 | 4155 } |
| 4156 | |
| 4157 void Threads::remove(JavaThread* p) { | |
| 4158 // Extra scope needed for Thread_lock, so we can check | |
| 4159 // that we do not remove thread without safepoint code notice | |
| 4160 { MutexLocker ml(Threads_lock); | |
| 4161 | |
| 4162 assert(includes(p), "p must be present"); | |
| 4163 | |
| 4164 JavaThread* current = _thread_list; | |
| 4165 JavaThread* prev = NULL; | |
| 4166 | |
| 4167 while (current != p) { | |
| 4168 prev = current; | |
| 4169 current = current->next(); | |
| 4170 } | |
| 4171 | |
| 4172 if (prev) { | |
| 4173 prev->set_next(current->next()); | |
| 4174 } else { | |
| 4175 _thread_list = p->next(); | |
| 4176 } | |
| 4177 _number_of_threads--; | |
| 4178 oop threadObj = p->threadObj(); | |
| 4179 bool daemon = true; | |
| 4180 if (threadObj == NULL || !java_lang_Thread::is_daemon(threadObj)) { | |
| 4181 _number_of_non_daemon_threads--; | |
| 4182 daemon = false; | |
| 4183 | |
| 4184 // Only one thread left, do a notify on the Threads_lock so a thread waiting | |
| 4185 // on destroy_vm will wake up. | |
| 4186 if (number_of_non_daemon_threads() == 1) | |
| 4187 Threads_lock->notify_all(); | |
| 4188 } | |
| 4189 ThreadService::remove_thread(p, daemon); | |
| 4190 | |
| 4191 // Make sure that safepoint code disregard this thread. This is needed since | |
| 4192 // the thread might mess around with locks after this point. This can cause it | |
| 4193 // to do callbacks into the safepoint code. However, the safepoint code is not aware | |
| 4194 // of this thread since it is removed from the queue. | |
| 4195 p->set_terminated_value(); | |
| 6197 | 4196 |
| 4197 // Now, this thread is not visible to safepoint | |
| 4198 p->set_safepoint_visible(false); | |
|
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4199 // once the thread becomes safepoint invisible, we can not use its per-thread |
|
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4200 // recorder. And Threads::do_threads() no longer walks this thread, so we have |
|
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4201 // to release its per-thread recorder here. |
|
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|
4202 MemTracker::thread_exiting(p); |
| 0 | 4203 } // unlock Threads_lock |
| 4204 | |
| 4205 // Since Events::log uses a lock, we grab it outside the Threads_lock | |
|
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4206 Events::log(p, "Thread exited: " INTPTR_FORMAT, p); |
| 0 | 4207 } |
| 4208 | |
| 4209 // Threads_lock must be held when this is called (or must be called during a safepoint) | |
| 4210 bool Threads::includes(JavaThread* p) { | |
| 4211 assert(Threads_lock->is_locked(), "sanity check"); | |
| 4212 ALL_JAVA_THREADS(q) { | |
| 4213 if (q == p ) { | |
| 4214 return true; | |
| 4215 } | |
| 4216 } | |
| 4217 return false; | |
| 4218 } | |
| 4219 | |
| 4220 // Operations on the Threads list for GC. These are not explicitly locked, | |
| 4221 // but the garbage collector must provide a safe context for them to run. | |
| 4222 // In particular, these things should never be called when the Threads_lock | |
| 4223 // is held by some other thread. (Note: the Safepoint abstraction also | |
| 4224 // uses the Threads_lock to gurantee this property. It also makes sure that | |
| 4225 // all threads gets blocked when exiting or starting). | |
| 4226 | |
|
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|
4227 void Threads::oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
| 0 | 4228 ALL_JAVA_THREADS(p) { |
|
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|
4229 p->oops_do(f, cld_f, cf); |
| 0 | 4230 } |
|
7179
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|
4231 VMThread::vm_thread()->oops_do(f, cld_f, cf); |
| 0 | 4232 } |
| 4233 | |
|
7179
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|
4234 void Threads::possibly_parallel_oops_do(OopClosure* f, CLDToOopClosure* cld_f, CodeBlobClosure* cf) { |
| 0 | 4235 // Introduce a mechanism allowing parallel threads to claim threads as |
| 4236 // root groups. Overhead should be small enough to use all the time, | |
| 4237 // even in sequential code. | |
| 4238 SharedHeap* sh = SharedHeap::heap(); | |
|
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|
4239 // Cannot yet substitute active_workers for n_par_threads |
|
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|
4240 // because of G1CollectedHeap::verify() use of |
|
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|
4241 // SharedHeap::process_strong_roots(). n_par_threads == 0 will |
|
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|
4242 // turn off parallelism in process_strong_roots while active_workers |
|
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|
4243 // is being used for parallelism elsewhere. |
|
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|
4244 bool is_par = sh->n_par_threads() > 0; |
|
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|
4245 assert(!is_par || |
|
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|
4246 (SharedHeap::heap()->n_par_threads() == |
|
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|
4247 SharedHeap::heap()->workers()->active_workers()), "Mismatch"); |
| 0 | 4248 int cp = SharedHeap::heap()->strong_roots_parity(); |
| 4249 ALL_JAVA_THREADS(p) { | |
| 4250 if (p->claim_oops_do(is_par, cp)) { | |
|
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|
4251 p->oops_do(f, cld_f, cf); |
| 0 | 4252 } |
| 4253 } | |
| 4254 VMThread* vmt = VMThread::vm_thread(); | |
|
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|
4255 if (vmt->claim_oops_do(is_par, cp)) { |
|
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|
4256 vmt->oops_do(f, cld_f, cf); |
|
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|
4257 } |
| 0 | 4258 } |
| 4259 | |
|
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|
4260 #if INCLUDE_ALL_GCS |
| 0 | 4261 // Used by ParallelScavenge |
| 4262 void Threads::create_thread_roots_tasks(GCTaskQueue* q) { | |
| 4263 ALL_JAVA_THREADS(p) { | |
| 4264 q->enqueue(new ThreadRootsTask(p)); | |
| 4265 } | |
| 4266 q->enqueue(new ThreadRootsTask(VMThread::vm_thread())); | |
| 4267 } | |
| 4268 | |
| 4269 // Used by Parallel Old | |
| 4270 void Threads::create_thread_roots_marking_tasks(GCTaskQueue* q) { | |
| 4271 ALL_JAVA_THREADS(p) { | |
| 4272 q->enqueue(new ThreadRootsMarkingTask(p)); | |
| 4273 } | |
| 4274 q->enqueue(new ThreadRootsMarkingTask(VMThread::vm_thread())); | |
| 4275 } | |
|
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|
4276 #endif // INCLUDE_ALL_GCS |
| 0 | 4277 |
|
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|
4278 void Threads::nmethods_do(CodeBlobClosure* cf) { |
| 0 | 4279 ALL_JAVA_THREADS(p) { |
|
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|
4280 p->nmethods_do(cf); |
| 0 | 4281 } |
|
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|
4282 VMThread::vm_thread()->nmethods_do(cf); |
| 0 | 4283 } |
| 4284 | |
|
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4285 void Threads::metadata_do(void f(Metadata*)) { |
|
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|
4286 ALL_JAVA_THREADS(p) { |
|
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|
4287 p->metadata_do(f); |
|
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|
4288 } |
|
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|
4289 } |
|
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|
4290 |
| 0 | 4291 void Threads::gc_epilogue() { |
| 4292 ALL_JAVA_THREADS(p) { | |
| 4293 p->gc_epilogue(); | |
| 4294 } | |
| 4295 } | |
| 4296 | |
| 4297 void Threads::gc_prologue() { | |
| 4298 ALL_JAVA_THREADS(p) { | |
| 4299 p->gc_prologue(); | |
| 4300 } | |
| 4301 } | |
| 4302 | |
| 4303 void Threads::deoptimized_wrt_marked_nmethods() { | |
| 4304 ALL_JAVA_THREADS(p) { | |
| 4305 p->deoptimized_wrt_marked_nmethods(); | |
| 4306 } | |
| 4307 } | |
| 4308 | |
| 4309 | |
| 4310 // Get count Java threads that are waiting to enter the specified monitor. | |
| 4311 GrowableArray<JavaThread*>* Threads::get_pending_threads(int count, | |
| 4312 address monitor, bool doLock) { | |
| 4313 assert(doLock || SafepointSynchronize::is_at_safepoint(), | |
| 4314 "must grab Threads_lock or be at safepoint"); | |
| 4315 GrowableArray<JavaThread*>* result = new GrowableArray<JavaThread*>(count); | |
| 4316 | |
| 4317 int i = 0; | |
| 4318 { | |
| 4319 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
| 4320 ALL_JAVA_THREADS(p) { | |
| 4321 if (p->is_Compiler_thread()) continue; | |
| 4322 | |
| 4323 address pending = (address)p->current_pending_monitor(); | |
| 4324 if (pending == monitor) { // found a match | |
| 4325 if (i < count) result->append(p); // save the first count matches | |
| 4326 i++; | |
| 4327 } | |
| 4328 } | |
| 4329 } | |
| 4330 return result; | |
| 4331 } | |
| 4332 | |
| 4333 | |
| 4334 JavaThread *Threads::owning_thread_from_monitor_owner(address owner, bool doLock) { | |
| 4335 assert(doLock || | |
| 4336 Threads_lock->owned_by_self() || | |
| 4337 SafepointSynchronize::is_at_safepoint(), | |
| 4338 "must grab Threads_lock or be at safepoint"); | |
| 4339 | |
| 4340 // NULL owner means not locked so we can skip the search | |
| 4341 if (owner == NULL) return NULL; | |
| 4342 | |
| 4343 { | |
| 4344 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
| 4345 ALL_JAVA_THREADS(p) { | |
| 4346 // first, see if owner is the address of a Java thread | |
| 4347 if (owner == (address)p) return p; | |
| 4348 } | |
| 4349 } | |
|
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4350 // 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
|
4351 // 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
|
4352 // like deadlock detection. |
| 0 | 4353 if (UseHeavyMonitors) return NULL; |
| 4354 | |
| 4355 // | |
| 4356 // If we didn't find a matching Java thread and we didn't force use of | |
| 4357 // heavyweight monitors, then the owner is the stack address of the | |
| 4358 // Lock Word in the owning Java thread's stack. | |
| 4359 // | |
| 4360 JavaThread* the_owner = NULL; | |
| 4361 { | |
| 4362 MutexLockerEx ml(doLock ? Threads_lock : NULL); | |
| 4363 ALL_JAVA_THREADS(q) { | |
|
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
xlu
parents:
669
diff
changeset
|
4364 if (q->is_lock_owned(owner)) { |
| 0 | 4365 the_owner = q; |
|
702
b9fba36710f2
6699669: Hotspot server leaves synchronized block with monitor in bad state
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parents:
669
diff
changeset
|
4366 break; |
| 0 | 4367 } |
| 4368 } | |
| 4369 } | |
|
8673
5ee250974db9
8007476: assert(the_owner != NULL) failed: Did not find owning Java thread for lock word address
dcubed
parents:
8041
diff
changeset
|
4370 // cannot assert on lack of success here; see above comment |
| 0 | 4371 return the_owner; |
| 4372 } | |
| 4373 | |
| 4374 // Threads::print_on() is called at safepoint by VM_PrintThreads operation. | |
| 4375 void Threads::print_on(outputStream* st, bool print_stacks, bool internal_format, bool print_concurrent_locks) { | |
| 4376 char buf[32]; | |
| 4377 st->print_cr(os::local_time_string(buf, sizeof(buf))); | |
| 4378 | |
| 4379 st->print_cr("Full thread dump %s (%s %s):", | |
| 4380 Abstract_VM_Version::vm_name(), | |
| 4381 Abstract_VM_Version::vm_release(), | |
| 4382 Abstract_VM_Version::vm_info_string() | |
| 4383 ); | |
| 4384 st->cr(); | |
| 4385 | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4386 #if INCLUDE_ALL_GCS |
| 0 | 4387 // Dump concurrent locks |
| 4388 ConcurrentLocksDump concurrent_locks; | |
| 4389 if (print_concurrent_locks) { | |
| 4390 concurrent_locks.dump_at_safepoint(); | |
| 4391 } | |
|
8001
db9981fd3124
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jprovino
parents:
7615
diff
changeset
|
4392 #endif // INCLUDE_ALL_GCS |
| 0 | 4393 |
| 4394 ALL_JAVA_THREADS(p) { | |
| 4395 ResourceMark rm; | |
| 4396 p->print_on(st); | |
| 4397 if (print_stacks) { | |
| 4398 if (internal_format) { | |
| 4399 p->trace_stack(); | |
| 4400 } else { | |
| 4401 p->print_stack_on(st); | |
| 4402 } | |
| 4403 } | |
| 4404 st->cr(); | |
|
8001
db9981fd3124
8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS
jprovino
parents:
7615
diff
changeset
|
4405 #if INCLUDE_ALL_GCS |
| 0 | 4406 if (print_concurrent_locks) { |
| 4407 concurrent_locks.print_locks_on(p, st); | |
| 4408 } | |
|
8001
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jprovino
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7615
diff
changeset
|
4409 #endif // INCLUDE_ALL_GCS |
| 0 | 4410 } |
| 4411 | |
| 4412 VMThread::vm_thread()->print_on(st); | |
| 4413 st->cr(); | |
| 4414 Universe::heap()->print_gc_threads_on(st); | |
| 4415 WatcherThread* wt = WatcherThread::watcher_thread(); | |
| 6766 | 4416 if (wt != NULL) { |
| 4417 wt->print_on(st); | |
| 4418 st->cr(); | |
| 4419 } | |
| 0 | 4420 CompileBroker::print_compiler_threads_on(st); |
| 4421 st->flush(); | |
| 4422 } | |
| 4423 | |
| 4424 // Threads::print_on_error() is called by fatal error handler. It's possible | |
| 4425 // that VM is not at safepoint and/or current thread is inside signal handler. | |
| 4426 // Don't print stack trace, as the stack may not be walkable. Don't allocate | |
| 4427 // memory (even in resource area), it might deadlock the error handler. | |
| 4428 void Threads::print_on_error(outputStream* st, Thread* current, char* buf, int buflen) { | |
| 4429 bool found_current = false; | |
| 4430 st->print_cr("Java Threads: ( => current thread )"); | |
| 4431 ALL_JAVA_THREADS(thread) { | |
| 4432 bool is_current = (current == thread); | |
| 4433 found_current = found_current || is_current; | |
| 4434 | |
| 4435 st->print("%s", is_current ? "=>" : " "); | |
| 4436 | |
| 4437 st->print(PTR_FORMAT, thread); | |
| 4438 st->print(" "); | |
| 4439 thread->print_on_error(st, buf, buflen); | |
| 4440 st->cr(); | |
| 4441 } | |
| 4442 st->cr(); | |
| 4443 | |
| 4444 st->print_cr("Other Threads:"); | |
| 4445 if (VMThread::vm_thread()) { | |
| 4446 bool is_current = (current == VMThread::vm_thread()); | |
| 4447 found_current = found_current || is_current; | |
| 4448 st->print("%s", current == VMThread::vm_thread() ? "=>" : " "); | |
| 4449 | |
| 4450 st->print(PTR_FORMAT, VMThread::vm_thread()); | |
| 4451 st->print(" "); | |
| 4452 VMThread::vm_thread()->print_on_error(st, buf, buflen); | |
| 4453 st->cr(); | |
| 4454 } | |
| 4455 WatcherThread* wt = WatcherThread::watcher_thread(); | |
| 4456 if (wt != NULL) { | |
| 4457 bool is_current = (current == wt); | |
| 4458 found_current = found_current || is_current; | |
| 4459 st->print("%s", is_current ? "=>" : " "); | |
| 4460 | |
| 4461 st->print(PTR_FORMAT, wt); | |
| 4462 st->print(" "); | |
| 4463 wt->print_on_error(st, buf, buflen); | |
| 4464 st->cr(); | |
| 4465 } | |
| 4466 if (!found_current) { | |
| 4467 st->cr(); | |
| 4468 st->print("=>" PTR_FORMAT " (exited) ", current); | |
| 4469 current->print_on_error(st, buf, buflen); | |
| 4470 st->cr(); | |
| 4471 } | |
| 4472 } | |
| 4473 | |
| 1878 | 4474 // Internal SpinLock and Mutex |
| 4475 // Based on ParkEvent | |
| 4476 | |
| 4477 // Ad-hoc mutual exclusion primitives: SpinLock and Mux | |
| 0 | 4478 // |
| 1878 | 4479 // We employ SpinLocks _only for low-contention, fixed-length |
| 4480 // short-duration critical sections where we're concerned | |
| 4481 // about native mutex_t or HotSpot Mutex:: latency. | |
| 4482 // The mux construct provides a spin-then-block mutual exclusion | |
| 4483 // mechanism. | |
| 4484 // | |
| 4485 // Testing has shown that contention on the ListLock guarding gFreeList | |
| 4486 // is common. If we implement ListLock as a simple SpinLock it's common | |
| 4487 // for the JVM to devolve to yielding with little progress. This is true | |
| 4488 // despite the fact that the critical sections protected by ListLock are | |
| 4489 // extremely short. | |
| 0 | 4490 // |
| 1878 | 4491 // TODO-FIXME: ListLock should be of type SpinLock. |
| 4492 // We should make this a 1st-class type, integrated into the lock | |
| 4493 // hierarchy as leaf-locks. Critically, the SpinLock structure | |
| 4494 // should have sufficient padding to avoid false-sharing and excessive | |
| 4495 // cache-coherency traffic. | |
| 4496 | |
| 4497 | |
| 4498 typedef volatile int SpinLockT ; | |
| 4499 | |
| 4500 void Thread::SpinAcquire (volatile int * adr, const char * LockName) { | |
| 4501 if (Atomic::cmpxchg (1, adr, 0) == 0) { | |
| 4502 return ; // normal fast-path return | |
| 4503 } | |
| 4504 | |
| 4505 // Slow-path : We've encountered contention -- Spin/Yield/Block strategy. | |
| 4506 TEVENT (SpinAcquire - ctx) ; | |
| 4507 int ctr = 0 ; | |
| 4508 int Yields = 0 ; | |
| 0 | 4509 for (;;) { |
| 1878 | 4510 while (*adr != 0) { |
| 4511 ++ctr ; | |
| 4512 if ((ctr & 0xFFF) == 0 || !os::is_MP()) { | |
| 4513 if (Yields > 5) { | |
| 4514 // Consider using a simple NakedSleep() instead. | |
| 4515 // Then SpinAcquire could be called by non-JVM threads | |
| 4516 Thread::current()->_ParkEvent->park(1) ; | |
| 4517 } else { | |
| 4518 os::NakedYield() ; | |
| 4519 ++Yields ; | |
| 4520 } | |
| 4521 } else { | |
| 4522 SpinPause() ; | |
| 0 | 4523 } |
| 1878 | 4524 } |
| 4525 if (Atomic::cmpxchg (1, adr, 0) == 0) return ; | |
| 0 | 4526 } |
| 4527 } | |
| 4528 | |
| 1878 | 4529 void Thread::SpinRelease (volatile int * adr) { |
| 4530 assert (*adr != 0, "invariant") ; | |
| 4531 OrderAccess::fence() ; // guarantee at least release consistency. | |
| 4532 // Roach-motel semantics. | |
| 4533 // It's safe if subsequent LDs and STs float "up" into the critical section, | |
| 4534 // but prior LDs and STs within the critical section can't be allowed | |
| 4535 // to reorder or float past the ST that releases the lock. | |
| 4536 *adr = 0 ; | |
| 0 | 4537 } |
| 4538 | |
| 1878 | 4539 // muxAcquire and muxRelease: |
| 4540 // | |
| 4541 // * muxAcquire and muxRelease support a single-word lock-word construct. | |
| 4542 // The LSB of the word is set IFF the lock is held. | |
| 4543 // The remainder of the word points to the head of a singly-linked list | |
| 4544 // of threads blocked on the lock. | |
| 4545 // | |
| 4546 // * The current implementation of muxAcquire-muxRelease uses its own | |
| 4547 // dedicated Thread._MuxEvent instance. If we're interested in | |
| 4548 // minimizing the peak number of extant ParkEvent instances then | |
| 4549 // we could eliminate _MuxEvent and "borrow" _ParkEvent as long | |
| 4550 // as certain invariants were satisfied. Specifically, care would need | |
| 4551 // to be taken with regards to consuming unpark() "permits". | |
| 4552 // A safe rule of thumb is that a thread would never call muxAcquire() | |
| 4553 // if it's enqueued (cxq, EntryList, WaitList, etc) and will subsequently | |
| 4554 // park(). Otherwise the _ParkEvent park() operation in muxAcquire() could | |
| 4555 // consume an unpark() permit intended for monitorenter, for instance. | |
| 4556 // One way around this would be to widen the restricted-range semaphore | |
| 4557 // implemented in park(). Another alternative would be to provide | |
| 4558 // multiple instances of the PlatformEvent() for each thread. One | |
| 4559 // instance would be dedicated to muxAcquire-muxRelease, for instance. | |
| 4560 // | |
| 4561 // * Usage: | |
| 4562 // -- Only as leaf locks | |
| 4563 // -- for short-term locking only as muxAcquire does not perform | |
| 4564 // thread state transitions. | |
| 4565 // | |
| 4566 // Alternatives: | |
| 4567 // * We could implement muxAcquire and muxRelease with MCS or CLH locks | |
| 4568 // but with parking or spin-then-park instead of pure spinning. | |
| 4569 // * Use Taura-Oyama-Yonenzawa locks. | |
| 4570 // * It's possible to construct a 1-0 lock if we encode the lockword as | |
| 4571 // (List,LockByte). Acquire will CAS the full lockword while Release | |
| 4572 // will STB 0 into the LockByte. The 1-0 scheme admits stranding, so | |
| 4573 // acquiring threads use timers (ParkTimed) to detect and recover from | |
| 4574 // the stranding window. Thread/Node structures must be aligned on 256-byte | |
| 4575 // boundaries by using placement-new. | |
| 4576 // * Augment MCS with advisory back-link fields maintained with CAS(). | |
| 4577 // Pictorially: LockWord -> T1 <-> T2 <-> T3 <-> ... <-> Tn <-> Owner. | |
| 4578 // The validity of the backlinks must be ratified before we trust the value. | |
| 4579 // If the backlinks are invalid the exiting thread must back-track through the | |
| 4580 // the forward links, which are always trustworthy. | |
| 4581 // * Add a successor indication. The LockWord is currently encoded as | |
| 4582 // (List, LOCKBIT:1). We could also add a SUCCBIT or an explicit _succ variable | |
| 4583 // to provide the usual futile-wakeup optimization. | |
| 4584 // See RTStt for details. | |
| 4585 // * Consider schedctl.sc_nopreempt to cover the critical section. | |
| 4586 // | |
| 4587 | |
| 4588 | |
| 4589 typedef volatile intptr_t MutexT ; // Mux Lock-word | |
| 4590 enum MuxBits { LOCKBIT = 1 } ; | |
| 4591 | |
| 4592 void Thread::muxAcquire (volatile intptr_t * Lock, const char * LockName) { | |
| 4593 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
| 4594 if (w == 0) return ; | |
| 4595 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4596 return ; | |
| 4597 } | |
| 4598 | |
| 4599 TEVENT (muxAcquire - Contention) ; | |
| 4600 ParkEvent * const Self = Thread::current()->_MuxEvent ; | |
| 4601 assert ((intptr_t(Self) & LOCKBIT) == 0, "invariant") ; | |
| 0 | 4602 for (;;) { |
| 1878 | 4603 int its = (os::is_MP() ? 100 : 0) + 1 ; |
| 4604 | |
| 4605 // Optional spin phase: spin-then-park strategy | |
| 4606 while (--its >= 0) { | |
| 4607 w = *Lock ; | |
| 4608 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4609 return ; | |
| 4610 } | |
| 4611 } | |
| 4612 | |
| 4613 Self->reset() ; | |
| 4614 Self->OnList = intptr_t(Lock) ; | |
| 4615 // The following fence() isn't _strictly necessary as the subsequent | |
| 4616 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
| 4617 OrderAccess::fence(); | |
| 4618 for (;;) { | |
| 4619 w = *Lock ; | |
| 4620 if ((w & LOCKBIT) == 0) { | |
| 4621 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4622 Self->OnList = 0 ; // hygiene - allows stronger asserts | |
| 4623 return ; | |
| 4624 } | |
| 4625 continue ; // Interference -- *Lock changed -- Just retry | |
| 0 | 4626 } |
| 1878 | 4627 assert (w & LOCKBIT, "invariant") ; |
| 4628 Self->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
| 4629 if (Atomic::cmpxchg_ptr (intptr_t(Self)|LOCKBIT, Lock, w) == w) break ; | |
| 4630 } | |
| 4631 | |
| 4632 while (Self->OnList != 0) { | |
| 4633 Self->park() ; | |
| 4634 } | |
| 0 | 4635 } |
| 4636 } | |
| 4637 | |
| 1878 | 4638 void Thread::muxAcquireW (volatile intptr_t * Lock, ParkEvent * ev) { |
| 4639 intptr_t w = Atomic::cmpxchg_ptr (LOCKBIT, Lock, 0) ; | |
| 4640 if (w == 0) return ; | |
| 4641 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4642 return ; | |
| 4643 } | |
| 4644 | |
| 4645 TEVENT (muxAcquire - Contention) ; | |
| 4646 ParkEvent * ReleaseAfter = NULL ; | |
| 4647 if (ev == NULL) { | |
| 4648 ev = ReleaseAfter = ParkEvent::Allocate (NULL) ; | |
| 4649 } | |
| 4650 assert ((intptr_t(ev) & LOCKBIT) == 0, "invariant") ; | |
| 4651 for (;;) { | |
| 4652 guarantee (ev->OnList == 0, "invariant") ; | |
| 4653 int its = (os::is_MP() ? 100 : 0) + 1 ; | |
| 4654 | |
| 4655 // Optional spin phase: spin-then-park strategy | |
| 4656 while (--its >= 0) { | |
| 4657 w = *Lock ; | |
| 4658 if ((w & LOCKBIT) == 0 && Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4659 if (ReleaseAfter != NULL) { | |
| 4660 ParkEvent::Release (ReleaseAfter) ; | |
| 4661 } | |
| 4662 return ; | |
| 4663 } | |
| 4664 } | |
| 4665 | |
| 4666 ev->reset() ; | |
| 4667 ev->OnList = intptr_t(Lock) ; | |
| 4668 // The following fence() isn't _strictly necessary as the subsequent | |
| 4669 // CAS() both serializes execution and ratifies the fetched *Lock value. | |
| 4670 OrderAccess::fence(); | |
| 4671 for (;;) { | |
| 4672 w = *Lock ; | |
| 4673 if ((w & LOCKBIT) == 0) { | |
| 4674 if (Atomic::cmpxchg_ptr (w|LOCKBIT, Lock, w) == w) { | |
| 4675 ev->OnList = 0 ; | |
| 4676 // We call ::Release while holding the outer lock, thus | |
| 4677 // artificially lengthening the critical section. | |
| 4678 // Consider deferring the ::Release() until the subsequent unlock(), | |
| 4679 // after we've dropped the outer lock. | |
| 4680 if (ReleaseAfter != NULL) { | |
| 4681 ParkEvent::Release (ReleaseAfter) ; | |
| 4682 } | |
| 4683 return ; | |
| 4684 } | |
| 4685 continue ; // Interference -- *Lock changed -- Just retry | |
| 4686 } | |
| 4687 assert (w & LOCKBIT, "invariant") ; | |
| 4688 ev->ListNext = (ParkEvent *) (w & ~LOCKBIT ); | |
| 4689 if (Atomic::cmpxchg_ptr (intptr_t(ev)|LOCKBIT, Lock, w) == w) break ; | |
| 4690 } | |
| 4691 | |
| 4692 while (ev->OnList != 0) { | |
| 4693 ev->park() ; | |
| 4694 } | |
| 4695 } | |
| 4696 } | |
| 4697 | |
| 4698 // Release() must extract a successor from the list and then wake that thread. | |
| 4699 // It can "pop" the front of the list or use a detach-modify-reattach (DMR) scheme | |
| 4700 // similar to that used by ParkEvent::Allocate() and ::Release(). DMR-based | |
| 4701 // Release() would : | |
| 4702 // (A) CAS() or swap() null to *Lock, releasing the lock and detaching the list. | |
| 4703 // (B) Extract a successor from the private list "in-hand" | |
| 4704 // (C) attempt to CAS() the residual back into *Lock over null. | |
| 4705 // If there were any newly arrived threads and the CAS() would fail. | |
| 4706 // In that case Release() would detach the RATs, re-merge the list in-hand | |
| 4707 // with the RATs and repeat as needed. Alternately, Release() might | |
| 4708 // detach and extract a successor, but then pass the residual list to the wakee. | |
| 4709 // The wakee would be responsible for reattaching and remerging before it | |
| 4710 // competed for the lock. | |
| 4711 // | |
| 4712 // Both "pop" and DMR are immune from ABA corruption -- there can be | |
| 4713 // multiple concurrent pushers, but only one popper or detacher. | |
| 4714 // This implementation pops from the head of the list. This is unfair, | |
| 4715 // but tends to provide excellent throughput as hot threads remain hot. | |
| 4716 // (We wake recently run threads first). | |
| 4717 | |
| 4718 void Thread::muxRelease (volatile intptr_t * Lock) { | |
| 4719 for (;;) { | |
| 4720 const intptr_t w = Atomic::cmpxchg_ptr (0, Lock, LOCKBIT) ; | |
| 4721 assert (w & LOCKBIT, "invariant") ; | |
| 4722 if (w == LOCKBIT) return ; | |
| 4723 ParkEvent * List = (ParkEvent *) (w & ~LOCKBIT) ; | |
| 4724 assert (List != NULL, "invariant") ; | |
| 4725 assert (List->OnList == intptr_t(Lock), "invariant") ; | |
| 4726 ParkEvent * nxt = List->ListNext ; | |
| 4727 | |
| 4728 // The following CAS() releases the lock and pops the head element. | |
| 4729 if (Atomic::cmpxchg_ptr (intptr_t(nxt), Lock, w) != w) { | |
| 4730 continue ; | |
| 4731 } | |
| 4732 List->OnList = 0 ; | |
| 4733 OrderAccess::fence() ; | |
| 4734 List->unpark () ; | |
| 4735 return ; | |
| 4736 } | |
| 4737 } | |
| 4738 | |
| 4739 | |
| 0 | 4740 void Threads::verify() { |
| 4741 ALL_JAVA_THREADS(p) { | |
| 4742 p->verify(); | |
| 4743 } | |
| 4744 VMThread* thread = VMThread::vm_thread(); | |
| 4745 if (thread != NULL) thread->verify(); | |
| 4746 } |