1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 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 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/classLoader.hpp" 27 #include "classfile/stringTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "code/codeCache.hpp" 30 #include "compiler/compileBroker.hpp" 31 #include "compiler/compilerOracle.hpp" 32 #include "interpreter/bytecodeHistogram.hpp" 33 #include "memory/genCollectedHeap.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/universe.hpp" 36 #include "oops/constantPool.hpp" 37 #include "oops/generateOopMap.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceOop.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "prims/jvmtiExport.hpp" 45 #include "runtime/arguments.hpp" 46 #include "runtime/biasedLocking.hpp" 47 #include "runtime/compilationPolicy.hpp" 48 #include "runtime/fprofiler.hpp" 49 #include "runtime/init.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/java.hpp" 52 #include "runtime/memprofiler.hpp" 53 #include "runtime/sharedRuntime.hpp" 54 #include "runtime/statSampler.hpp" 55 #include "runtime/sweeper.hpp" 56 #include "runtime/task.hpp" 57 #include "runtime/thread.inline.hpp" 58 #include "runtime/timer.hpp" 59 #include "runtime/vm_operations.hpp" 60 #include "services/memReporter.hpp" 61 #include "services/memTracker.hpp" 62 #include "trace/tracing.hpp" 63 #include "utilities/dtrace.hpp" 64 #include "utilities/globalDefinitions.hpp" 65 #include "utilities/histogram.hpp" 66 #include "utilities/macros.hpp" 67 #include "utilities/vmError.hpp" 68 #ifdef TARGET_ARCH_x86 69 # include "vm_version_x86.hpp" 70 #endif 71 #ifdef TARGET_ARCH_sparc 72 # include "vm_version_sparc.hpp" 73 #endif 74 #ifdef TARGET_ARCH_zero 75 # include "vm_version_zero.hpp" 76 #endif 77 #ifdef TARGET_ARCH_arm 78 # include "vm_version_arm.hpp" 79 #endif 80 #ifdef TARGET_ARCH_ppc 81 # include "vm_version_ppc.hpp" 82 #endif 83 #if INCLUDE_ALL_GCS 84 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" 85 #include "gc_implementation/parallelScavenge/psScavenge.hpp" 86 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 87 #endif // INCLUDE_ALL_GCS 88 #ifdef COMPILER1 89 #include "c1/c1_Compiler.hpp" 90 #include "c1/c1_Runtime1.hpp" 91 #endif 92 #ifdef COMPILER2 93 #include "code/compiledIC.hpp" 94 #include "compiler/methodLiveness.hpp" 95 #include "opto/compile.hpp" 96 #include "opto/indexSet.hpp" 97 #include "opto/runtime.hpp" 98 #endif 99 100 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 101 102 GrowableArray<Method*>* collected_profiled_methods; 103 104 int compare_methods(Method** a, Method** b) { 105 // %%% there can be 32-bit overflow here 106 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 107 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 108 } 109 110 void collect_profiled_methods(Method* m) { 111 Thread* thread = Thread::current(); 112 // This HandleMark prevents a huge amount of handles from being added 113 // to the metadata_handles() array on the thread. 114 HandleMark hm(thread); 115 methodHandle mh(thread, m); 116 if ((m->method_data() != NULL) && 117 (PrintMethodData || CompilerOracle::should_print(mh))) { 118 collected_profiled_methods->push(m); 119 } 120 } 121 122 void print_method_profiling_data() { 123 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) { 124 ResourceMark rm; 125 HandleMark hm; 126 collected_profiled_methods = new GrowableArray<Method*>(1024); 127 ClassLoaderDataGraph::methods_do(collect_profiled_methods); 128 collected_profiled_methods->sort(&compare_methods); 129 130 int count = collected_profiled_methods->length(); 131 int total_size = 0; 132 if (count > 0) { 133 for (int index = 0; index < count; index++) { 134 Method* m = collected_profiled_methods->at(index); 135 ttyLocker ttyl; 136 tty->print_cr("------------------------------------------------------------------------"); 137 m->print_invocation_count(); 138 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 139 tty->cr(); 140 // Dump data on parameters if any 141 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 142 tty->fill_to(2); 143 m->method_data()->parameters_type_data()->print_data_on(tty); 144 } 145 m->print_codes(); 146 total_size += m->method_data()->size_in_bytes(); 147 } 148 tty->print_cr("------------------------------------------------------------------------"); 149 tty->print_cr("Total MDO size: %d bytes", total_size); 150 } 151 } 152 } 153 154 155 #ifndef PRODUCT 156 157 // Statistics printing (method invocation histogram) 158 159 GrowableArray<Method*>* collected_invoked_methods; 160 161 void collect_invoked_methods(Method* m) { 162 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 163 collected_invoked_methods->push(m); 164 } 165 } 166 167 168 169 170 void print_method_invocation_histogram() { 171 ResourceMark rm; 172 HandleMark hm; 173 collected_invoked_methods = new GrowableArray<Method*>(1024); 174 SystemDictionary::methods_do(collect_invoked_methods); 175 collected_invoked_methods->sort(&compare_methods); 176 // 177 tty->cr(); 178 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 179 tty->cr(); 180 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 181 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 182 synch_total = 0, nativ_total = 0, acces_total = 0; 183 for (int index = 0; index < collected_invoked_methods->length(); index++) { 184 Method* m = collected_invoked_methods->at(index); 185 int c = m->invocation_count() + m->compiled_invocation_count(); 186 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 187 int_total += m->invocation_count(); 188 comp_total += m->compiled_invocation_count(); 189 if (m->is_final()) final_total += c; 190 if (m->is_static()) static_total += c; 191 if (m->is_synchronized()) synch_total += c; 192 if (m->is_native()) nativ_total += c; 193 if (m->is_accessor()) acces_total += c; 194 } 195 tty->cr(); 196 total = int_total + comp_total; 197 tty->print_cr("Invocations summary:"); 198 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 199 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 200 tty->print_cr("\t%9d (100%%) total", total); 201 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 202 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 203 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 204 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 205 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 206 tty->cr(); 207 SharedRuntime::print_call_statistics(comp_total); 208 } 209 210 void print_bytecode_count() { 211 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 212 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 213 } 214 } 215 216 AllocStats alloc_stats; 217 218 219 220 // General statistics printing (profiling ...) 221 void print_statistics() { 222 #ifdef ASSERT 223 224 if (CountRuntimeCalls) { 225 extern Histogram *RuntimeHistogram; 226 RuntimeHistogram->print(); 227 } 228 229 if (CountJNICalls) { 230 extern Histogram *JNIHistogram; 231 JNIHistogram->print(); 232 } 233 234 if (CountJVMCalls) { 235 extern Histogram *JVMHistogram; 236 JVMHistogram->print(); 237 } 238 239 #endif 240 241 if (MemProfiling) { 242 MemProfiler::disengage(); 243 } 244 245 if (CITime) { 246 CompileBroker::print_times(); 247 } 248 249 #ifdef COMPILER1 250 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 251 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 252 Runtime1::print_statistics(); 253 Deoptimization::print_statistics(); 254 SharedRuntime::print_statistics(); 255 nmethod::print_statistics(); 256 } 257 #endif /* COMPILER1 */ 258 259 #ifdef COMPILER2 260 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 261 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 262 Compile::print_statistics(); 263 #ifndef COMPILER1 264 Deoptimization::print_statistics(); 265 nmethod::print_statistics(); 266 SharedRuntime::print_statistics(); 267 #endif //COMPILER1 268 os::print_statistics(); 269 } 270 271 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 272 OptoRuntime::print_named_counters(); 273 } 274 275 if (TimeLivenessAnalysis) { 276 MethodLiveness::print_times(); 277 } 278 #ifdef ASSERT 279 if (CollectIndexSetStatistics) { 280 IndexSet::print_statistics(); 281 } 282 #endif // ASSERT 283 #endif // COMPILER2 284 if (CountCompiledCalls) { 285 print_method_invocation_histogram(); 286 } 287 288 print_method_profiling_data(); 289 290 if (TimeCompiler) { 291 COMPILER2_PRESENT(Compile::print_timers();) 292 } 293 if (TimeCompilationPolicy) { 294 CompilationPolicy::policy()->print_time(); 295 } 296 if (TimeOopMap) { 297 GenerateOopMap::print_time(); 298 } 299 if (ProfilerCheckIntervals) { 300 PeriodicTask::print_intervals(); 301 } 302 if (PrintSymbolTableSizeHistogram) { 303 SymbolTable::print_histogram(); 304 } 305 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 306 BytecodeCounter::print(); 307 } 308 if (PrintBytecodePairHistogram) { 309 BytecodePairHistogram::print(); 310 } 311 312 if (PrintCodeCache) { 313 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 314 CodeCache::print(); 315 } 316 317 if (PrintMethodFlushingStatistics) { 318 NMethodSweeper::print(); 319 } 320 321 if (PrintCodeCache2) { 322 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 323 CodeCache::print_internals(); 324 } 325 326 if (PrintClassStatistics) { 327 SystemDictionary::print_class_statistics(); 328 } 329 if (PrintMethodStatistics) { 330 SystemDictionary::print_method_statistics(); 331 } 332 333 if (PrintVtableStats) { 334 klassVtable::print_statistics(); 335 klassItable::print_statistics(); 336 } 337 if (VerifyOops) { 338 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 339 } 340 341 print_bytecode_count(); 342 if (PrintMallocStatistics) { 343 tty->print("allocation stats: "); 344 alloc_stats.print(); 345 tty->cr(); 346 } 347 348 if (PrintSystemDictionaryAtExit) { 349 SystemDictionary::print(); 350 } 351 352 if (PrintBiasedLockingStatistics) { 353 BiasedLocking::print_counters(); 354 } 355 356 #ifdef ENABLE_ZAP_DEAD_LOCALS 357 #ifdef COMPILER2 358 if (ZapDeadCompiledLocals) { 359 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); 360 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); 361 } 362 #endif // COMPILER2 363 #endif // ENABLE_ZAP_DEAD_LOCALS 364 // Native memory tracking data 365 if (PrintNMTStatistics) { 366 if (MemTracker::is_on()) { 367 BaselineTTYOutputer outputer(tty); 368 MemTracker::print_memory_usage(outputer, K, false); 369 } else { 370 tty->print_cr("%s", MemTracker::reason()); 371 } 372 } 373 } 374 375 #else // PRODUCT MODE STATISTICS 376 377 void print_statistics() { 378 379 if (PrintMethodData) { 380 print_method_profiling_data(); 381 } 382 383 if (CITime) { 384 CompileBroker::print_times(); 385 } 386 387 if (PrintCodeCache) { 388 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 389 CodeCache::print(); 390 } 391 392 if (PrintMethodFlushingStatistics) { 393 NMethodSweeper::print(); 394 } 395 396 #ifdef COMPILER2 397 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) { 398 OptoRuntime::print_named_counters(); 399 } 400 #endif 401 if (PrintBiasedLockingStatistics) { 402 BiasedLocking::print_counters(); 403 } 404 405 // Native memory tracking data 406 if (PrintNMTStatistics) { 407 if (MemTracker::is_on()) { 408 BaselineTTYOutputer outputer(tty); 409 MemTracker::print_memory_usage(outputer, K, false); 410 } else { 411 tty->print_cr("%s", MemTracker::reason()); 412 } 413 } 414 } 415 416 #endif 417 418 419 // Helper class for registering on_exit calls through JVM_OnExit 420 421 extern "C" { 422 typedef void (*__exit_proc)(void); 423 } 424 425 class ExitProc : public CHeapObj<mtInternal> { 426 private: 427 __exit_proc _proc; 428 // void (*_proc)(void); 429 ExitProc* _next; 430 public: 431 // ExitProc(void (*proc)(void)) { 432 ExitProc(__exit_proc proc) { 433 _proc = proc; 434 _next = NULL; 435 } 436 void evaluate() { _proc(); } 437 ExitProc* next() const { return _next; } 438 void set_next(ExitProc* next) { _next = next; } 439 }; 440 441 442 // Linked list of registered on_exit procedures 443 444 static ExitProc* exit_procs = NULL; 445 446 447 extern "C" { 448 void register_on_exit_function(void (*func)(void)) { 449 ExitProc *entry = new ExitProc(func); 450 // Classic vm does not throw an exception in case the allocation failed, 451 if (entry != NULL) { 452 entry->set_next(exit_procs); 453 exit_procs = entry; 454 } 455 } 456 } 457 458 // Note: before_exit() can be executed only once, if more than one threads 459 // are trying to shutdown the VM at the same time, only one thread 460 // can run before_exit() and all other threads must wait. 461 void before_exit(JavaThread * thread) { 462 #define BEFORE_EXIT_NOT_RUN 0 463 #define BEFORE_EXIT_RUNNING 1 464 #define BEFORE_EXIT_DONE 2 465 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 466 467 // Note: don't use a Mutex to guard the entire before_exit(), as 468 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 469 // A CAS or OSMutex would work just fine but then we need to manipulate 470 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 471 // for synchronization. 472 { MutexLocker ml(BeforeExit_lock); 473 switch (_before_exit_status) { 474 case BEFORE_EXIT_NOT_RUN: 475 _before_exit_status = BEFORE_EXIT_RUNNING; 476 break; 477 case BEFORE_EXIT_RUNNING: 478 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 479 BeforeExit_lock->wait(); 480 } 481 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 482 return; 483 case BEFORE_EXIT_DONE: 484 return; 485 } 486 } 487 488 // The only difference between this and Win32's _onexit procs is that 489 // this version is invoked before any threads get killed. 490 ExitProc* current = exit_procs; 491 while (current != NULL) { 492 ExitProc* next = current->next(); 493 current->evaluate(); 494 delete current; 495 current = next; 496 } 497 498 // Hang forever on exit if we're reporting an error. 499 if (ShowMessageBoxOnError && is_error_reported()) { 500 os::infinite_sleep(); 501 } 502 503 // Stop any ongoing concurrent GC work 504 Universe::heap()->stop(); 505 506 // Terminate watcher thread - must before disenrolling any periodic task 507 if (PeriodicTask::num_tasks() > 0) 508 WatcherThread::stop(); 509 510 // Print statistics gathered (profiling ...) 511 if (Arguments::has_profile()) { 512 FlatProfiler::disengage(); 513 FlatProfiler::print(10); 514 } 515 516 // shut down the StatSampler task 517 StatSampler::disengage(); 518 StatSampler::destroy(); 519 520 // We do not need to explicitly stop concurrent GC threads because the 521 // JVM will be taken down at a safepoint when such threads are inactive -- 522 // except for some concurrent G1 threads, see (comment in) 523 // Threads::destroy_vm(). 524 525 // Print GC/heap related information. 526 if (PrintGCDetails) { 527 Universe::print(); 528 AdaptiveSizePolicyOutput(0); 529 if (Verbose) { 530 ClassLoaderDataGraph::dump_on(gclog_or_tty); 531 } 532 } 533 534 if (PrintBytecodeHistogram) { 535 BytecodeHistogram::print(); 536 } 537 538 if (JvmtiExport::should_post_thread_life()) { 539 JvmtiExport::post_thread_end(thread); 540 } 541 542 543 EventThreadEnd event; 544 if (event.should_commit()) { 545 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 546 event.commit(); 547 } 548 549 // Always call even when there are not JVMTI environments yet, since environments 550 // may be attached late and JVMTI must track phases of VM execution 551 JvmtiExport::post_vm_death(); 552 Threads::shutdown_vm_agents(); 553 554 // Terminate the signal thread 555 // Note: we don't wait until it actually dies. 556 os::terminate_signal_thread(); 557 558 print_statistics(); 559 Universe::heap()->print_tracing_info(); 560 561 { MutexLocker ml(BeforeExit_lock); 562 _before_exit_status = BEFORE_EXIT_DONE; 563 BeforeExit_lock->notify_all(); 564 } 565 566 // Shutdown NMT before exit. Otherwise, 567 // it will run into trouble when system destroys static variables. 568 MemTracker::shutdown(MemTracker::NMT_normal); 569 570 if (VerifyStringTableAtExit) { 571 int fail_cnt = 0; 572 { 573 MutexLocker ml(StringTable_lock); 574 fail_cnt = StringTable::verify_and_compare_entries(); 575 } 576 577 if (fail_cnt != 0) { 578 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 579 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 580 } 581 } 582 583 #undef BEFORE_EXIT_NOT_RUN 584 #undef BEFORE_EXIT_RUNNING 585 #undef BEFORE_EXIT_DONE 586 } 587 588 void vm_exit(int code) { 589 Thread* thread = ThreadLocalStorage::is_initialized() ? 590 ThreadLocalStorage::get_thread_slow() : NULL; 591 if (thread == NULL) { 592 // we have serious problems -- just exit 593 vm_direct_exit(code); 594 } 595 596 if (VMThread::vm_thread() != NULL) { 597 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 598 VM_Exit op(code); 599 if (thread->is_Java_thread()) 600 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 601 VMThread::execute(&op); 602 // should never reach here; but in case something wrong with VM Thread. 603 vm_direct_exit(code); 604 } else { 605 // VM thread is gone, just exit 606 vm_direct_exit(code); 607 } 608 ShouldNotReachHere(); 609 } 610 611 void notify_vm_shutdown() { 612 // For now, just a dtrace probe. 613 HOTSPOT_VM_SHUTDOWN(); 614 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 615 } 616 617 void vm_direct_exit(int code) { 618 notify_vm_shutdown(); 619 os::wait_for_keypress_at_exit(); 620 ::exit(code); 621 } 622 623 void vm_perform_shutdown_actions() { 624 // Warning: do not call 'exit_globals()' here. All threads are still running. 625 // Calling 'exit_globals()' will disable thread-local-storage and cause all 626 // kinds of assertions to trigger in debug mode. 627 if (is_init_completed()) { 628 Thread* thread = ThreadLocalStorage::is_initialized() ? 629 ThreadLocalStorage::get_thread_slow() : NULL; 630 if (thread != NULL && thread->is_Java_thread()) { 631 // We are leaving the VM, set state to native (in case any OS exit 632 // handlers call back to the VM) 633 JavaThread* jt = (JavaThread*)thread; 634 // Must always be walkable or have no last_Java_frame when in 635 // thread_in_native 636 jt->frame_anchor()->make_walkable(jt); 637 jt->set_thread_state(_thread_in_native); 638 } 639 } 640 notify_vm_shutdown(); 641 } 642 643 void vm_shutdown() 644 { 645 vm_perform_shutdown_actions(); 646 os::wait_for_keypress_at_exit(); 647 os::shutdown(); 648 } 649 650 void vm_abort(bool dump_core) { 651 vm_perform_shutdown_actions(); 652 os::wait_for_keypress_at_exit(); 653 os::abort(dump_core); 654 ShouldNotReachHere(); 655 } 656 657 void vm_notify_during_shutdown(const char* error, const char* message) { 658 if (error != NULL) { 659 tty->print_cr("Error occurred during initialization of VM"); 660 tty->print("%s", error); 661 if (message != NULL) { 662 tty->print_cr(": %s", message); 663 } 664 else { 665 tty->cr(); 666 } 667 } 668 if (ShowMessageBoxOnError && WizardMode) { 669 fatal("Error occurred during initialization of VM"); 670 } 671 } 672 673 void vm_exit_during_initialization(Handle exception) { 674 tty->print_cr("Error occurred during initialization of VM"); 675 // If there are exceptions on this thread it must be cleared 676 // first and here. Any future calls to EXCEPTION_MARK requires 677 // that no pending exceptions exist. 678 Thread *THREAD = Thread::current(); 679 if (HAS_PENDING_EXCEPTION) { 680 CLEAR_PENDING_EXCEPTION; 681 } 682 java_lang_Throwable::print(exception, tty); 683 tty->cr(); 684 java_lang_Throwable::print_stack_trace(exception(), tty); 685 tty->cr(); 686 vm_notify_during_shutdown(NULL, NULL); 687 688 // Failure during initialization, we don't want to dump core 689 vm_abort(false); 690 } 691 692 void vm_exit_during_initialization(Symbol* ex, const char* message) { 693 ResourceMark rm; 694 vm_notify_during_shutdown(ex->as_C_string(), message); 695 696 // Failure during initialization, we don't want to dump core 697 vm_abort(false); 698 } 699 700 void vm_exit_during_initialization(const char* error, const char* message) { 701 vm_notify_during_shutdown(error, message); 702 703 // Failure during initialization, we don't want to dump core 704 vm_abort(false); 705 } 706 707 void vm_shutdown_during_initialization(const char* error, const char* message) { 708 vm_notify_during_shutdown(error, message); 709 vm_shutdown(); 710 } 711 712 JDK_Version JDK_Version::_current; 713 const char* JDK_Version::_runtime_name; 714 const char* JDK_Version::_runtime_version; 715 716 void JDK_Version::initialize() { 717 jdk_version_info info; 718 assert(!_current.is_valid(), "Don't initialize twice"); 719 720 void *lib_handle = os::native_java_library(); 721 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 722 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 723 724 if (func == NULL) { 725 // JDK older than 1.6 726 _current._partially_initialized = true; 727 } else { 728 (*func)(&info, sizeof(info)); 729 730 int major = JDK_VERSION_MAJOR(info.jdk_version); 731 int minor = JDK_VERSION_MINOR(info.jdk_version); 732 int micro = JDK_VERSION_MICRO(info.jdk_version); 733 int build = JDK_VERSION_BUILD(info.jdk_version); 734 if (major == 1 && minor > 4) { 735 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 736 major = minor; 737 minor = micro; 738 micro = 0; 739 } 740 _current = JDK_Version(major, minor, micro, info.update_version, 741 info.special_update_version, build, 742 info.thread_park_blocker == 1, 743 info.post_vm_init_hook_enabled == 1, 744 info.pending_list_uses_discovered_field == 1); 745 } 746 } 747 748 void JDK_Version::fully_initialize( 749 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 750 // This is only called when current is less than 1.6 and we've gotten 751 // far enough in the initialization to determine the exact version. 752 assert(major < 6, "not needed for JDK version >= 6"); 753 assert(is_partially_initialized(), "must not initialize"); 754 if (major < 5) { 755 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 756 micro = minor; 757 minor = major; 758 major = 1; 759 } 760 _current = JDK_Version(major, minor, micro, update); 761 } 762 763 void JDK_Version_init() { 764 JDK_Version::initialize(); 765 } 766 767 static int64_t encode_jdk_version(const JDK_Version& v) { 768 return 769 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 770 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 771 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 772 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 773 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 774 ((int64_t)v.build_number() << (BitsPerByte * 0)); 775 } 776 777 int JDK_Version::compare(const JDK_Version& other) const { 778 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 779 if (!is_partially_initialized() && other.is_partially_initialized()) { 780 return -(other.compare(*this)); // flip the comparators 781 } 782 assert(!other.is_partially_initialized(), "Not initialized yet"); 783 if (is_partially_initialized()) { 784 assert(other.major_version() >= 6, 785 "Invalid JDK version comparison during initialization"); 786 return -1; 787 } else { 788 uint64_t e = encode_jdk_version(*this); 789 uint64_t o = encode_jdk_version(other); 790 return (e > o) ? 1 : ((e == o) ? 0 : -1); 791 } 792 } 793 794 void JDK_Version::to_string(char* buffer, size_t buflen) const { 795 size_t index = 0; 796 if (!is_valid()) { 797 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 798 } else if (is_partially_initialized()) { 799 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 800 } else { 801 index += jio_snprintf( 802 &buffer[index], buflen - index, "%d.%d", _major, _minor); 803 if (_micro > 0) { 804 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 805 } 806 if (_update > 0) { 807 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 808 } 809 if (_special > 0) { 810 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); 811 } 812 if (_build > 0) { 813 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 814 } 815 } 816 }