1 /* 2 * Copyright (c) 1997, 2013, 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/symbolTable.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 #ifndef USDT2 101 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown); 102 #endif /* !USDT2 */ 103 104 #ifndef PRODUCT 105 106 // Statistics printing (method invocation histogram) 107 108 GrowableArray<Method*>* collected_invoked_methods; 109 110 void collect_invoked_methods(Method* m) { 111 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 112 collected_invoked_methods->push(m); 113 } 114 } 115 116 117 GrowableArray<Method*>* collected_profiled_methods; 118 119 void collect_profiled_methods(Method* m) { 120 Thread* thread = Thread::current(); 121 // This HandleMark prevents a huge amount of handles from being added 122 // to the metadata_handles() array on the thread. 123 HandleMark hm(thread); 124 methodHandle mh(thread, m); 125 if ((m->method_data() != NULL) && 126 (PrintMethodData || CompilerOracle::should_print(mh))) { 127 collected_profiled_methods->push(m); 128 } 129 } 130 131 132 int compare_methods(Method** a, Method** b) { 133 // %%% there can be 32-bit overflow here 134 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 135 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 136 } 137 138 139 void print_method_invocation_histogram() { 140 ResourceMark rm; 141 HandleMark hm; 142 collected_invoked_methods = new GrowableArray<Method*>(1024); 143 SystemDictionary::methods_do(collect_invoked_methods); 144 collected_invoked_methods->sort(&compare_methods); 145 // 146 tty->cr(); 147 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 148 tty->cr(); 149 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 150 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 151 synch_total = 0, nativ_total = 0, acces_total = 0; 152 for (int index = 0; index < collected_invoked_methods->length(); index++) { 153 Method* m = collected_invoked_methods->at(index); 154 int c = m->invocation_count() + m->compiled_invocation_count(); 155 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 156 int_total += m->invocation_count(); 157 comp_total += m->compiled_invocation_count(); 158 if (m->is_final()) final_total += c; 159 if (m->is_static()) static_total += c; 160 if (m->is_synchronized()) synch_total += c; 161 if (m->is_native()) nativ_total += c; 162 if (m->is_accessor()) acces_total += c; 163 } 164 tty->cr(); 165 total = int_total + comp_total; 166 tty->print_cr("Invocations summary:"); 167 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 168 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 169 tty->print_cr("\t%9d (100%%) total", total); 170 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 171 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 172 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 173 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 174 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 175 tty->cr(); 176 SharedRuntime::print_call_statistics(comp_total); 177 } 178 179 void print_method_profiling_data() { 180 ResourceMark rm; 181 HandleMark hm; 182 collected_profiled_methods = new GrowableArray<Method*>(1024); 183 SystemDictionary::methods_do(collect_profiled_methods); 184 collected_profiled_methods->sort(&compare_methods); 185 186 int count = collected_profiled_methods->length(); 187 int total_size = 0; 188 if (count > 0) { 189 for (int index = 0; index < count; index++) { 190 Method* m = collected_profiled_methods->at(index); 191 ttyLocker ttyl; 192 tty->print_cr("------------------------------------------------------------------------"); 193 //m->print_name(tty); 194 m->print_invocation_count(); 195 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes()); 196 tty->cr(); 197 // Dump data on parameters if any 198 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) { 199 tty->fill_to(2); 200 m->method_data()->parameters_type_data()->print_data_on(tty); 201 } 202 m->print_codes(); 203 total_size += m->method_data()->size_in_bytes(); 204 } 205 tty->print_cr("------------------------------------------------------------------------"); 206 tty->print_cr("Total MDO size: %d bytes", total_size); 207 } 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) { 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 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) { 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(MemTracker::reason()); 371 } 372 } 373 } 374 375 #else // PRODUCT MODE STATISTICS 376 377 void print_statistics() { 378 379 if (CITime) { 380 CompileBroker::print_times(); 381 } 382 383 if (PrintCodeCache) { 384 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 385 CodeCache::print(); 386 } 387 388 if (PrintMethodFlushingStatistics) { 389 NMethodSweeper::print(); 390 } 391 392 #ifdef COMPILER2 393 if (PrintPreciseBiasedLockingStatistics) { 394 OptoRuntime::print_named_counters(); 395 } 396 #endif 397 if (PrintBiasedLockingStatistics) { 398 BiasedLocking::print_counters(); 399 } 400 401 // Native memory tracking data 402 if (PrintNMTStatistics) { 403 if (MemTracker::is_on()) { 404 BaselineTTYOutputer outputer(tty); 405 MemTracker::print_memory_usage(outputer, K, false); 406 } else { 407 tty->print_cr(MemTracker::reason()); 408 } 409 } 410 } 411 412 #endif 413 414 415 // Helper class for registering on_exit calls through JVM_OnExit 416 417 extern "C" { 418 typedef void (*__exit_proc)(void); 419 } 420 421 class ExitProc : public CHeapObj<mtInternal> { 422 private: 423 __exit_proc _proc; 424 // void (*_proc)(void); 425 ExitProc* _next; 426 public: 427 // ExitProc(void (*proc)(void)) { 428 ExitProc(__exit_proc proc) { 429 _proc = proc; 430 _next = NULL; 431 } 432 void evaluate() { _proc(); } 433 ExitProc* next() const { return _next; } 434 void set_next(ExitProc* next) { _next = next; } 435 }; 436 437 438 // Linked list of registered on_exit procedures 439 440 static ExitProc* exit_procs = NULL; 441 442 443 extern "C" { 444 void register_on_exit_function(void (*func)(void)) { 445 ExitProc *entry = new ExitProc(func); 446 // Classic vm does not throw an exception in case the allocation failed, 447 if (entry != NULL) { 448 entry->set_next(exit_procs); 449 exit_procs = entry; 450 } 451 } 452 } 453 454 // Note: before_exit() can be executed only once, if more than one threads 455 // are trying to shutdown the VM at the same time, only one thread 456 // can run before_exit() and all other threads must wait. 457 void before_exit(JavaThread * thread) { 458 #define BEFORE_EXIT_NOT_RUN 0 459 #define BEFORE_EXIT_RUNNING 1 460 #define BEFORE_EXIT_DONE 2 461 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 462 463 // Note: don't use a Mutex to guard the entire before_exit(), as 464 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 465 // A CAS or OSMutex would work just fine but then we need to manipulate 466 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 467 // for synchronization. 468 { MutexLocker ml(BeforeExit_lock); 469 switch (_before_exit_status) { 470 case BEFORE_EXIT_NOT_RUN: 471 _before_exit_status = BEFORE_EXIT_RUNNING; 472 break; 473 case BEFORE_EXIT_RUNNING: 474 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 475 BeforeExit_lock->wait(); 476 } 477 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 478 return; 479 case BEFORE_EXIT_DONE: 480 return; 481 } 482 } 483 484 // The only difference between this and Win32's _onexit procs is that 485 // this version is invoked before any threads get killed. 486 ExitProc* current = exit_procs; 487 while (current != NULL) { 488 ExitProc* next = current->next(); 489 current->evaluate(); 490 delete current; 491 current = next; 492 } 493 494 // Hang forever on exit if we're reporting an error. 495 if (ShowMessageBoxOnError && is_error_reported()) { 496 os::infinite_sleep(); 497 } 498 499 // Terminate watcher thread - must before disenrolling any periodic task 500 if (PeriodicTask::num_tasks() > 0) 501 WatcherThread::stop(); 502 503 // Print statistics gathered (profiling ...) 504 if (Arguments::has_profile()) { 505 FlatProfiler::disengage(); 506 FlatProfiler::print(10); 507 } 508 509 // shut down the StatSampler task 510 StatSampler::disengage(); 511 StatSampler::destroy(); 512 513 // We do not need to explicitly stop concurrent GC threads because the 514 // JVM will be taken down at a safepoint when such threads are inactive -- 515 // except for some concurrent G1 threads, see (comment in) 516 // Threads::destroy_vm(). 517 518 // Print GC/heap related information. 519 if (PrintGCDetails) { 520 Universe::print(); 521 AdaptiveSizePolicyOutput(0); 522 if (Verbose) { 523 ClassLoaderDataGraph::dump_on(gclog_or_tty); 524 } 525 } 526 527 if (PrintBytecodeHistogram) { 528 BytecodeHistogram::print(); 529 } 530 531 if (JvmtiExport::should_post_thread_life()) { 532 JvmtiExport::post_thread_end(thread); 533 } 534 535 536 EventThreadEnd event; 537 if (event.should_commit()) { 538 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 539 event.commit(); 540 } 541 542 // Always call even when there are not JVMTI environments yet, since environments 543 // may be attached late and JVMTI must track phases of VM execution 544 JvmtiExport::post_vm_death(); 545 Threads::shutdown_vm_agents(); 546 547 // Terminate the signal thread 548 // Note: we don't wait until it actually dies. 549 os::terminate_signal_thread(); 550 551 print_statistics(); 552 Universe::heap()->print_tracing_info(); 553 554 { MutexLocker ml(BeforeExit_lock); 555 _before_exit_status = BEFORE_EXIT_DONE; 556 BeforeExit_lock->notify_all(); 557 } 558 559 // Shutdown NMT before exit. Otherwise, 560 // it will run into trouble when system destroys static variables. 561 MemTracker::shutdown(MemTracker::NMT_normal); 562 563 if (VerifyStringTableAtExit) { 564 int fail_cnt = 0; 565 { 566 MutexLocker ml(StringTable_lock); 567 fail_cnt = StringTable::verify_and_compare_entries(); 568 } 569 570 if (fail_cnt != 0) { 571 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt); 572 guarantee(fail_cnt == 0, "unexpected StringTable verification failures"); 573 } 574 } 575 576 #undef BEFORE_EXIT_NOT_RUN 577 #undef BEFORE_EXIT_RUNNING 578 #undef BEFORE_EXIT_DONE 579 } 580 581 void vm_exit(int code) { 582 Thread* thread = ThreadLocalStorage::is_initialized() ? 583 ThreadLocalStorage::get_thread_slow() : NULL; 584 if (thread == NULL) { 585 // we have serious problems -- just exit 586 vm_direct_exit(code); 587 } 588 589 if (VMThread::vm_thread() != NULL) { 590 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 591 VM_Exit op(code); 592 if (thread->is_Java_thread()) 593 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 594 VMThread::execute(&op); 595 // should never reach here; but in case something wrong with VM Thread. 596 vm_direct_exit(code); 597 } else { 598 // VM thread is gone, just exit 599 vm_direct_exit(code); 600 } 601 ShouldNotReachHere(); 602 } 603 604 void notify_vm_shutdown() { 605 // For now, just a dtrace probe. 606 #ifndef USDT2 607 HS_DTRACE_PROBE(hotspot, vm__shutdown); 608 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 609 #else /* USDT2 */ 610 HOTSPOT_VM_SHUTDOWN(); 611 #endif /* USDT2 */ 612 } 613 614 void vm_direct_exit(int code) { 615 notify_vm_shutdown(); 616 os::wait_for_keypress_at_exit(); 617 ::exit(code); 618 } 619 620 void vm_perform_shutdown_actions() { 621 // Warning: do not call 'exit_globals()' here. All threads are still running. 622 // Calling 'exit_globals()' will disable thread-local-storage and cause all 623 // kinds of assertions to trigger in debug mode. 624 if (is_init_completed()) { 625 Thread* thread = ThreadLocalStorage::is_initialized() ? 626 ThreadLocalStorage::get_thread_slow() : NULL; 627 if (thread != NULL && thread->is_Java_thread()) { 628 // We are leaving the VM, set state to native (in case any OS exit 629 // handlers call back to the VM) 630 JavaThread* jt = (JavaThread*)thread; 631 // Must always be walkable or have no last_Java_frame when in 632 // thread_in_native 633 jt->frame_anchor()->make_walkable(jt); 634 jt->set_thread_state(_thread_in_native); 635 } 636 } 637 notify_vm_shutdown(); 638 } 639 640 void vm_shutdown() 641 { 642 vm_perform_shutdown_actions(); 643 os::wait_for_keypress_at_exit(); 644 os::shutdown(); 645 } 646 647 void vm_abort(bool dump_core) { 648 vm_perform_shutdown_actions(); 649 os::wait_for_keypress_at_exit(); 650 os::abort(dump_core); 651 ShouldNotReachHere(); 652 } 653 654 void vm_notify_during_shutdown(const char* error, const char* message) { 655 if (error != NULL) { 656 tty->print_cr("Error occurred during initialization of VM"); 657 tty->print("%s", error); 658 if (message != NULL) { 659 tty->print_cr(": %s", message); 660 } 661 else { 662 tty->cr(); 663 } 664 } 665 if (ShowMessageBoxOnError && WizardMode) { 666 fatal("Error occurred during initialization of VM"); 667 } 668 } 669 670 void vm_exit_during_initialization(Handle exception) { 671 tty->print_cr("Error occurred during initialization of VM"); 672 // If there are exceptions on this thread it must be cleared 673 // first and here. Any future calls to EXCEPTION_MARK requires 674 // that no pending exceptions exist. 675 Thread *THREAD = Thread::current(); 676 if (HAS_PENDING_EXCEPTION) { 677 CLEAR_PENDING_EXCEPTION; 678 } 679 java_lang_Throwable::print(exception, tty); 680 tty->cr(); 681 java_lang_Throwable::print_stack_trace(exception(), tty); 682 tty->cr(); 683 vm_notify_during_shutdown(NULL, NULL); 684 685 // Failure during initialization, we don't want to dump core 686 vm_abort(false); 687 } 688 689 void vm_exit_during_initialization(Symbol* ex, const char* message) { 690 ResourceMark rm; 691 vm_notify_during_shutdown(ex->as_C_string(), message); 692 693 // Failure during initialization, we don't want to dump core 694 vm_abort(false); 695 } 696 697 void vm_exit_during_initialization(const char* error, const char* message) { 698 vm_notify_during_shutdown(error, message); 699 700 // Failure during initialization, we don't want to dump core 701 vm_abort(false); 702 } 703 704 void vm_shutdown_during_initialization(const char* error, const char* message) { 705 vm_notify_during_shutdown(error, message); 706 vm_shutdown(); 707 } 708 709 JDK_Version JDK_Version::_current; 710 const char* JDK_Version::_runtime_name; 711 const char* JDK_Version::_runtime_version; 712 713 void JDK_Version::initialize() { 714 jdk_version_info info; 715 assert(!_current.is_valid(), "Don't initialize twice"); 716 717 void *lib_handle = os::native_java_library(); 718 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 719 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 720 721 if (func == NULL) { 722 // JDK older than 1.6 723 _current._partially_initialized = true; 724 } else { 725 (*func)(&info, sizeof(info)); 726 727 int major = JDK_VERSION_MAJOR(info.jdk_version); 728 int minor = JDK_VERSION_MINOR(info.jdk_version); 729 int micro = JDK_VERSION_MICRO(info.jdk_version); 730 int build = JDK_VERSION_BUILD(info.jdk_version); 731 if (major == 1 && minor > 4) { 732 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 733 major = minor; 734 minor = micro; 735 micro = 0; 736 } 737 _current = JDK_Version(major, minor, micro, info.update_version, 738 info.special_update_version, build, 739 info.thread_park_blocker == 1, 740 info.post_vm_init_hook_enabled == 1, 741 info.pending_list_uses_discovered_field == 1); 742 } 743 } 744 745 void JDK_Version::fully_initialize( 746 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 747 // This is only called when current is less than 1.6 and we've gotten 748 // far enough in the initialization to determine the exact version. 749 assert(major < 6, "not needed for JDK version >= 6"); 750 assert(is_partially_initialized(), "must not initialize"); 751 if (major < 5) { 752 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 753 micro = minor; 754 minor = major; 755 major = 1; 756 } 757 _current = JDK_Version(major, minor, micro, update); 758 } 759 760 void JDK_Version_init() { 761 JDK_Version::initialize(); 762 } 763 764 static int64_t encode_jdk_version(const JDK_Version& v) { 765 return 766 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 767 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 768 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 769 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 770 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 771 ((int64_t)v.build_number() << (BitsPerByte * 0)); 772 } 773 774 int JDK_Version::compare(const JDK_Version& other) const { 775 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 776 if (!is_partially_initialized() && other.is_partially_initialized()) { 777 return -(other.compare(*this)); // flip the comparators 778 } 779 assert(!other.is_partially_initialized(), "Not initialized yet"); 780 if (is_partially_initialized()) { 781 assert(other.major_version() >= 6, 782 "Invalid JDK version comparison during initialization"); 783 return -1; 784 } else { 785 uint64_t e = encode_jdk_version(*this); 786 uint64_t o = encode_jdk_version(other); 787 return (e > o) ? 1 : ((e == o) ? 0 : -1); 788 } 789 } 790 791 void JDK_Version::to_string(char* buffer, size_t buflen) const { 792 size_t index = 0; 793 if (!is_valid()) { 794 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 795 } else if (is_partially_initialized()) { 796 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 797 } else { 798 index += jio_snprintf( 799 &buffer[index], buflen - index, "%d.%d", _major, _minor); 800 if (_micro > 0) { 801 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 802 } 803 if (_update > 0) { 804 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 805 } 806 if (_special > 0) { 807 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); 808 } 809 if (_build > 0) { 810 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 811 } 812 } 813 }