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/task.hpp" 56 #include "runtime/thread.inline.hpp" 57 #include "runtime/timer.hpp" 58 #include "runtime/vm_operations.hpp" 59 #include "services/memReporter.hpp" 60 #include "services/memTracker.hpp" 61 #include "trace/tracing.hpp" 62 #include "utilities/dtrace.hpp" 63 #include "utilities/globalDefinitions.hpp" 64 #include "utilities/histogram.hpp" 65 #include "utilities/macros.hpp" 66 #include "utilities/vmError.hpp" 67 #ifdef TARGET_ARCH_x86 68 # include "vm_version_x86.hpp" 69 #endif 70 #ifdef TARGET_ARCH_sparc 71 # include "vm_version_sparc.hpp" 72 #endif 73 #ifdef TARGET_ARCH_zero 74 # include "vm_version_zero.hpp" 75 #endif 76 #ifdef TARGET_ARCH_arm 77 # include "vm_version_arm.hpp" 78 #endif 79 #ifdef TARGET_ARCH_ppc 80 # include "vm_version_ppc.hpp" 81 #endif 82 #if INCLUDE_ALL_GCS 83 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp" 84 #include "gc_implementation/parallelScavenge/psScavenge.hpp" 85 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp" 86 #endif // INCLUDE_ALL_GCS 87 #ifdef COMPILER1 88 #include "c1/c1_Compiler.hpp" 89 #include "c1/c1_Runtime1.hpp" 90 #endif 91 #ifdef COMPILER2 92 #include "code/compiledIC.hpp" 93 #include "compiler/methodLiveness.hpp" 94 #include "opto/compile.hpp" 95 #include "opto/indexSet.hpp" 96 #include "opto/runtime.hpp" 97 #endif 98 99 #ifndef USDT2 100 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown); 101 #endif /* !USDT2 */ 102 103 #ifndef PRODUCT 104 105 // Statistics printing (method invocation histogram) 106 107 GrowableArray<Method*>* collected_invoked_methods; 108 109 void collect_invoked_methods(Method* m) { 110 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) { 111 collected_invoked_methods->push(m); 112 } 113 } 114 115 116 GrowableArray<Method*>* collected_profiled_methods; 117 118 void collect_profiled_methods(Method* m) { 119 Thread* thread = Thread::current(); 120 // This HandleMark prevents a huge amount of handles from being added 121 // to the metadata_handles() array on the thread. 122 HandleMark hm(thread); 123 methodHandle mh(thread, m); 124 if ((m->method_data() != NULL) && 125 (PrintMethodData || PrintMethodDataStats || CompilerOracle::should_print(mh))) { 126 collected_profiled_methods->push(m); 127 } 128 } 129 130 131 int compare_methods(Method** a, Method** b) { 132 // %%% there can be 32-bit overflow here 133 return ((*b)->invocation_count() + (*b)->compiled_invocation_count()) 134 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()); 135 } 136 137 138 void print_method_invocation_histogram() { 139 ResourceMark rm; 140 HandleMark hm; 141 collected_invoked_methods = new GrowableArray<Method*>(1024); 142 SystemDictionary::methods_do(collect_invoked_methods); 143 collected_invoked_methods->sort(&compare_methods); 144 // 145 tty->cr(); 146 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff); 147 tty->cr(); 148 tty->print_cr("____Count_(I+C)____Method________________________Module_________________"); 149 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0, 150 synch_total = 0, nativ_total = 0, acces_total = 0; 151 for (int index = 0; index < collected_invoked_methods->length(); index++) { 152 Method* m = collected_invoked_methods->at(index); 153 int c = m->invocation_count() + m->compiled_invocation_count(); 154 if (c >= MethodHistogramCutoff) m->print_invocation_count(); 155 int_total += m->invocation_count(); 156 comp_total += m->compiled_invocation_count(); 157 if (m->is_final()) final_total += c; 158 if (m->is_static()) static_total += c; 159 if (m->is_synchronized()) synch_total += c; 160 if (m->is_native()) nativ_total += c; 161 if (m->is_accessor()) acces_total += c; 162 } 163 tty->cr(); 164 total = int_total + comp_total; 165 tty->print_cr("Invocations summary:"); 166 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total); 167 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total); 168 tty->print_cr("\t%9d (100%%) total", total); 169 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total); 170 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total); 171 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total); 172 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total); 173 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total); 174 tty->cr(); 175 SharedRuntime::print_call_statistics(comp_total); 176 } 177 178 void print_method_profiling_data() { 179 ResourceMark rm; 180 HandleMark hm; 181 collected_profiled_methods = new GrowableArray<Method*>(1024); 182 SystemDictionary::methods_do(collect_profiled_methods); 183 collected_profiled_methods->sort(&compare_methods); 184 185 int count = collected_profiled_methods->length(); 186 int total_size = 0; 187 if (count > 0) { 188 for (int index = 0; index < count; index++) { 189 Method* m = collected_profiled_methods->at(index); 190 if (PrintMethodData || CompilerOracle::should_print(m)) { 191 ttyLocker ttyl; 192 tty->print_cr("------------------------------------------------------------------------"); 193 //m->print_name(tty); 194 m->print_invocation_count(); 195 tty->cr(); 196 m->print_codes(); 197 } 198 if (PrintMethodDataStats) { 199 total_size += m->method_data()->size_in_bytes(); 200 } 201 } 202 tty->print_cr("------------------------------------------------------------------------"); 203 } 204 if (PrintMethodDataStats) { 205 tty->print_cr("Total MDO space = %d", total_size); 206 } 207 } 208 209 void print_bytecode_count() { 210 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 211 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value()); 212 } 213 } 214 215 AllocStats alloc_stats; 216 217 218 219 // General statistics printing (profiling ...) 220 221 void print_statistics() { 222 223 #ifdef ASSERT 224 225 if (CountRuntimeCalls) { 226 extern Histogram *RuntimeHistogram; 227 RuntimeHistogram->print(); 228 } 229 230 if (CountJNICalls) { 231 extern Histogram *JNIHistogram; 232 JNIHistogram->print(); 233 } 234 235 if (CountJVMCalls) { 236 extern Histogram *JVMHistogram; 237 JVMHistogram->print(); 238 } 239 240 #endif 241 242 if (MemProfiling) { 243 MemProfiler::disengage(); 244 } 245 246 if (CITime) { 247 CompileBroker::print_times(); 248 } 249 250 #ifdef COMPILER1 251 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) { 252 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics); 253 Runtime1::print_statistics(); 254 Deoptimization::print_statistics(); 255 SharedRuntime::print_statistics(); 256 nmethod::print_statistics(); 257 } 258 #endif /* COMPILER1 */ 259 260 #ifdef COMPILER2 261 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) { 262 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics); 263 Compile::print_statistics(); 264 #ifndef COMPILER1 265 Deoptimization::print_statistics(); 266 nmethod::print_statistics(); 267 SharedRuntime::print_statistics(); 268 #endif //COMPILER1 269 os::print_statistics(); 270 } 271 272 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) { 273 OptoRuntime::print_named_counters(); 274 } 275 276 if (TimeLivenessAnalysis) { 277 MethodLiveness::print_times(); 278 } 279 #ifdef ASSERT 280 if (CollectIndexSetStatistics) { 281 IndexSet::print_statistics(); 282 } 283 #endif // ASSERT 284 #endif // COMPILER2 285 if (CountCompiledCalls) { 286 print_method_invocation_histogram(); 287 } 288 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) { 289 print_method_profiling_data(); 290 } 291 if (TimeCompiler) { 292 COMPILER2_PRESENT(Compile::print_timers();) 293 } 294 if (TimeCompilationPolicy) { 295 CompilationPolicy::policy()->print_time(); 296 } 297 if (TimeOopMap) { 298 GenerateOopMap::print_time(); 299 } 300 if (ProfilerCheckIntervals) { 301 PeriodicTask::print_intervals(); 302 } 303 if (PrintSymbolTableSizeHistogram) { 304 SymbolTable::print_histogram(); 305 } 306 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) { 307 BytecodeCounter::print(); 308 } 309 if (PrintBytecodePairHistogram) { 310 BytecodePairHistogram::print(); 311 } 312 313 if (PrintCodeCache) { 314 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 315 CodeCache::print(); 316 } 317 318 if (PrintCodeCache2) { 319 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 320 CodeCache::print_internals(); 321 } 322 323 if (PrintClassStatistics) { 324 SystemDictionary::print_class_statistics(); 325 } 326 if (PrintMethodStatistics) { 327 SystemDictionary::print_method_statistics(); 328 } 329 330 if (PrintVtableStats) { 331 klassVtable::print_statistics(); 332 klassItable::print_statistics(); 333 } 334 if (VerifyOops) { 335 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count()); 336 } 337 338 print_bytecode_count(); 339 if (PrintMallocStatistics) { 340 tty->print("allocation stats: "); 341 alloc_stats.print(); 342 tty->cr(); 343 } 344 345 if (PrintSystemDictionaryAtExit) { 346 SystemDictionary::print(); 347 } 348 349 if (PrintBiasedLockingStatistics) { 350 BiasedLocking::print_counters(); 351 } 352 353 #ifdef ENABLE_ZAP_DEAD_LOCALS 354 #ifdef COMPILER2 355 if (ZapDeadCompiledLocals) { 356 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count); 357 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count); 358 } 359 #endif // COMPILER2 360 #endif // ENABLE_ZAP_DEAD_LOCALS 361 // Native memory tracking data 362 if (PrintNMTStatistics) { 363 if (MemTracker::is_on()) { 364 BaselineTTYOutputer outputer(tty); 365 MemTracker::print_memory_usage(outputer, K, false); 366 } else { 367 tty->print_cr(MemTracker::reason()); 368 } 369 } 370 } 371 372 #else // PRODUCT MODE STATISTICS 373 374 void print_statistics() { 375 376 if (CITime) { 377 CompileBroker::print_times(); 378 } 379 380 if (PrintCodeCache) { 381 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 382 CodeCache::print(); 383 } 384 385 #ifdef COMPILER2 386 if (PrintPreciseBiasedLockingStatistics) { 387 OptoRuntime::print_named_counters(); 388 } 389 #endif 390 if (PrintBiasedLockingStatistics) { 391 BiasedLocking::print_counters(); 392 } 393 394 // Native memory tracking data 395 if (PrintNMTStatistics) { 396 if (MemTracker::is_on()) { 397 BaselineTTYOutputer outputer(tty); 398 MemTracker::print_memory_usage(outputer, K, false); 399 } else { 400 tty->print_cr(MemTracker::reason()); 401 } 402 } 403 } 404 405 #endif 406 407 408 // Helper class for registering on_exit calls through JVM_OnExit 409 410 extern "C" { 411 typedef void (*__exit_proc)(void); 412 } 413 414 class ExitProc : public CHeapObj<mtInternal> { 415 private: 416 __exit_proc _proc; 417 // void (*_proc)(void); 418 ExitProc* _next; 419 public: 420 // ExitProc(void (*proc)(void)) { 421 ExitProc(__exit_proc proc) { 422 _proc = proc; 423 _next = NULL; 424 } 425 void evaluate() { _proc(); } 426 ExitProc* next() const { return _next; } 427 void set_next(ExitProc* next) { _next = next; } 428 }; 429 430 431 // Linked list of registered on_exit procedures 432 433 static ExitProc* exit_procs = NULL; 434 435 436 extern "C" { 437 void register_on_exit_function(void (*func)(void)) { 438 ExitProc *entry = new ExitProc(func); 439 // Classic vm does not throw an exception in case the allocation failed, 440 if (entry != NULL) { 441 entry->set_next(exit_procs); 442 exit_procs = entry; 443 } 444 } 445 } 446 447 // Note: before_exit() can be executed only once, if more than one threads 448 // are trying to shutdown the VM at the same time, only one thread 449 // can run before_exit() and all other threads must wait. 450 void before_exit(JavaThread * thread) { 451 #define BEFORE_EXIT_NOT_RUN 0 452 #define BEFORE_EXIT_RUNNING 1 453 #define BEFORE_EXIT_DONE 2 454 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN; 455 456 // Note: don't use a Mutex to guard the entire before_exit(), as 457 // JVMTI post_thread_end_event and post_vm_death_event will run native code. 458 // A CAS or OSMutex would work just fine but then we need to manipulate 459 // thread state for Safepoint. Here we use Monitor wait() and notify_all() 460 // for synchronization. 461 { MutexLocker ml(BeforeExit_lock); 462 switch (_before_exit_status) { 463 case BEFORE_EXIT_NOT_RUN: 464 _before_exit_status = BEFORE_EXIT_RUNNING; 465 break; 466 case BEFORE_EXIT_RUNNING: 467 while (_before_exit_status == BEFORE_EXIT_RUNNING) { 468 BeforeExit_lock->wait(); 469 } 470 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state"); 471 return; 472 case BEFORE_EXIT_DONE: 473 return; 474 } 475 } 476 477 // The only difference between this and Win32's _onexit procs is that 478 // this version is invoked before any threads get killed. 479 ExitProc* current = exit_procs; 480 while (current != NULL) { 481 ExitProc* next = current->next(); 482 current->evaluate(); 483 delete current; 484 current = next; 485 } 486 487 // Hang forever on exit if we're reporting an error. 488 if (ShowMessageBoxOnError && is_error_reported()) { 489 os::infinite_sleep(); 490 } 491 492 // Terminate watcher thread - must before disenrolling any periodic task 493 if (PeriodicTask::num_tasks() > 0) 494 WatcherThread::stop(); 495 496 // Print statistics gathered (profiling ...) 497 if (Arguments::has_profile()) { 498 FlatProfiler::disengage(); 499 FlatProfiler::print(10); 500 } 501 502 // shut down the StatSampler task 503 StatSampler::disengage(); 504 StatSampler::destroy(); 505 506 // We do not need to explicitly stop concurrent GC threads because the 507 // JVM will be taken down at a safepoint when such threads are inactive -- 508 // except for some concurrent G1 threads, see (comment in) 509 // Threads::destroy_vm(). 510 511 // Print GC/heap related information. 512 if (PrintGCDetails) { 513 Universe::print(); 514 AdaptiveSizePolicyOutput(0); 515 if (Verbose) { 516 ClassLoaderDataGraph::dump_on(gclog_or_tty); 517 } 518 } 519 520 if (PrintBytecodeHistogram) { 521 BytecodeHistogram::print(); 522 } 523 524 if (JvmtiExport::should_post_thread_life()) { 525 JvmtiExport::post_thread_end(thread); 526 } 527 528 529 EventThreadEnd event; 530 if (event.should_commit()) { 531 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj())); 532 event.commit(); 533 } 534 535 // Always call even when there are not JVMTI environments yet, since environments 536 // may be attached late and JVMTI must track phases of VM execution 537 JvmtiExport::post_vm_death(); 538 Threads::shutdown_vm_agents(); 539 540 // Terminate the signal thread 541 // Note: we don't wait until it actually dies. 542 os::terminate_signal_thread(); 543 544 print_statistics(); 545 Universe::heap()->print_tracing_info(); 546 547 { MutexLocker ml(BeforeExit_lock); 548 _before_exit_status = BEFORE_EXIT_DONE; 549 BeforeExit_lock->notify_all(); 550 } 551 552 // Shutdown NMT before exit. Otherwise, 553 // it will run into trouble when system destroys static variables. 554 MemTracker::shutdown(MemTracker::NMT_normal); 555 556 #undef BEFORE_EXIT_NOT_RUN 557 #undef BEFORE_EXIT_RUNNING 558 #undef BEFORE_EXIT_DONE 559 } 560 561 void vm_exit(int code) { 562 Thread* thread = ThreadLocalStorage::is_initialized() ? 563 ThreadLocalStorage::get_thread_slow() : NULL; 564 if (thread == NULL) { 565 // we have serious problems -- just exit 566 vm_direct_exit(code); 567 } 568 569 if (VMThread::vm_thread() != NULL) { 570 // Fire off a VM_Exit operation to bring VM to a safepoint and exit 571 VM_Exit op(code); 572 if (thread->is_Java_thread()) 573 ((JavaThread*)thread)->set_thread_state(_thread_in_vm); 574 VMThread::execute(&op); 575 // should never reach here; but in case something wrong with VM Thread. 576 vm_direct_exit(code); 577 } else { 578 // VM thread is gone, just exit 579 vm_direct_exit(code); 580 } 581 ShouldNotReachHere(); 582 } 583 584 void notify_vm_shutdown() { 585 // For now, just a dtrace probe. 586 #ifndef USDT2 587 HS_DTRACE_PROBE(hotspot, vm__shutdown); 588 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG(); 589 #else /* USDT2 */ 590 HOTSPOT_VM_SHUTDOWN(); 591 #endif /* USDT2 */ 592 } 593 594 void vm_direct_exit(int code) { 595 notify_vm_shutdown(); 596 os::wait_for_keypress_at_exit(); 597 ::exit(code); 598 } 599 600 void vm_perform_shutdown_actions() { 601 // Warning: do not call 'exit_globals()' here. All threads are still running. 602 // Calling 'exit_globals()' will disable thread-local-storage and cause all 603 // kinds of assertions to trigger in debug mode. 604 if (is_init_completed()) { 605 Thread* thread = ThreadLocalStorage::is_initialized() ? 606 ThreadLocalStorage::get_thread_slow() : NULL; 607 if (thread != NULL && thread->is_Java_thread()) { 608 // We are leaving the VM, set state to native (in case any OS exit 609 // handlers call back to the VM) 610 JavaThread* jt = (JavaThread*)thread; 611 // Must always be walkable or have no last_Java_frame when in 612 // thread_in_native 613 jt->frame_anchor()->make_walkable(jt); 614 jt->set_thread_state(_thread_in_native); 615 } 616 } 617 notify_vm_shutdown(); 618 } 619 620 void vm_shutdown() 621 { 622 vm_perform_shutdown_actions(); 623 os::wait_for_keypress_at_exit(); 624 os::shutdown(); 625 } 626 627 void vm_abort(bool dump_core) { 628 vm_perform_shutdown_actions(); 629 os::wait_for_keypress_at_exit(); 630 os::abort(dump_core); 631 ShouldNotReachHere(); 632 } 633 634 void vm_notify_during_shutdown(const char* error, const char* message) { 635 if (error != NULL) { 636 tty->print_cr("Error occurred during initialization of VM"); 637 tty->print("%s", error); 638 if (message != NULL) { 639 tty->print_cr(": %s", message); 640 } 641 else { 642 tty->cr(); 643 } 644 } 645 if (ShowMessageBoxOnError && WizardMode) { 646 fatal("Error occurred during initialization of VM"); 647 } 648 } 649 650 void vm_exit_during_initialization(Handle exception) { 651 tty->print_cr("Error occurred during initialization of VM"); 652 // If there are exceptions on this thread it must be cleared 653 // first and here. Any future calls to EXCEPTION_MARK requires 654 // that no pending exceptions exist. 655 Thread *THREAD = Thread::current(); 656 if (HAS_PENDING_EXCEPTION) { 657 CLEAR_PENDING_EXCEPTION; 658 } 659 java_lang_Throwable::print(exception, tty); 660 tty->cr(); 661 java_lang_Throwable::print_stack_trace(exception(), tty); 662 tty->cr(); 663 vm_notify_during_shutdown(NULL, NULL); 664 665 // Failure during initialization, we don't want to dump core 666 vm_abort(false); 667 } 668 669 void vm_exit_during_initialization(Symbol* ex, const char* message) { 670 ResourceMark rm; 671 vm_notify_during_shutdown(ex->as_C_string(), message); 672 673 // Failure during initialization, we don't want to dump core 674 vm_abort(false); 675 } 676 677 void vm_exit_during_initialization(const char* error, const char* message) { 678 vm_notify_during_shutdown(error, message); 679 680 // Failure during initialization, we don't want to dump core 681 vm_abort(false); 682 } 683 684 void vm_shutdown_during_initialization(const char* error, const char* message) { 685 vm_notify_during_shutdown(error, message); 686 vm_shutdown(); 687 } 688 689 JDK_Version JDK_Version::_current; 690 const char* JDK_Version::_runtime_name; 691 const char* JDK_Version::_runtime_version; 692 693 void JDK_Version::initialize() { 694 jdk_version_info info; 695 assert(!_current.is_valid(), "Don't initialize twice"); 696 697 void *lib_handle = os::native_java_library(); 698 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t, 699 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0")); 700 701 if (func == NULL) { 702 // JDK older than 1.6 703 _current._partially_initialized = true; 704 } else { 705 (*func)(&info, sizeof(info)); 706 707 int major = JDK_VERSION_MAJOR(info.jdk_version); 708 int minor = JDK_VERSION_MINOR(info.jdk_version); 709 int micro = JDK_VERSION_MICRO(info.jdk_version); 710 int build = JDK_VERSION_BUILD(info.jdk_version); 711 if (major == 1 && minor > 4) { 712 // We represent "1.5.0" as "5.0", but 1.4.2 as itself. 713 major = minor; 714 minor = micro; 715 micro = 0; 716 } 717 _current = JDK_Version(major, minor, micro, info.update_version, 718 info.special_update_version, build, 719 info.thread_park_blocker == 1, 720 info.post_vm_init_hook_enabled == 1, 721 info.pending_list_uses_discovered_field == 1); 722 } 723 } 724 725 void JDK_Version::fully_initialize( 726 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) { 727 // This is only called when current is less than 1.6 and we've gotten 728 // far enough in the initialization to determine the exact version. 729 assert(major < 6, "not needed for JDK version >= 6"); 730 assert(is_partially_initialized(), "must not initialize"); 731 if (major < 5) { 732 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc. 733 micro = minor; 734 minor = major; 735 major = 1; 736 } 737 _current = JDK_Version(major, minor, micro, update); 738 } 739 740 void JDK_Version_init() { 741 JDK_Version::initialize(); 742 } 743 744 static int64_t encode_jdk_version(const JDK_Version& v) { 745 return 746 ((int64_t)v.major_version() << (BitsPerByte * 5)) | 747 ((int64_t)v.minor_version() << (BitsPerByte * 4)) | 748 ((int64_t)v.micro_version() << (BitsPerByte * 3)) | 749 ((int64_t)v.update_version() << (BitsPerByte * 2)) | 750 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) | 751 ((int64_t)v.build_number() << (BitsPerByte * 0)); 752 } 753 754 int JDK_Version::compare(const JDK_Version& other) const { 755 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)"); 756 if (!is_partially_initialized() && other.is_partially_initialized()) { 757 return -(other.compare(*this)); // flip the comparators 758 } 759 assert(!other.is_partially_initialized(), "Not initialized yet"); 760 if (is_partially_initialized()) { 761 assert(other.major_version() >= 6, 762 "Invalid JDK version comparison during initialization"); 763 return -1; 764 } else { 765 uint64_t e = encode_jdk_version(*this); 766 uint64_t o = encode_jdk_version(other); 767 return (e > o) ? 1 : ((e == o) ? 0 : -1); 768 } 769 } 770 771 void JDK_Version::to_string(char* buffer, size_t buflen) const { 772 size_t index = 0; 773 if (!is_valid()) { 774 jio_snprintf(buffer, buflen, "%s", "(uninitialized)"); 775 } else if (is_partially_initialized()) { 776 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0"); 777 } else { 778 index += jio_snprintf( 779 &buffer[index], buflen - index, "%d.%d", _major, _minor); 780 if (_micro > 0) { 781 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro); 782 } 783 if (_update > 0) { 784 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update); 785 } 786 if (_special > 0) { 787 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special); 788 } 789 if (_build > 0) { 790 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build); 791 } 792 } 793 }