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