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/aprofiler.hpp"
  46 #include "runtime/arguments.hpp"
  47 #include "runtime/biasedLocking.hpp"
  48 #include "runtime/compilationPolicy.hpp"
  49 #include "runtime/fprofiler.hpp"
  50 #include "runtime/init.hpp"
  51 #include "runtime/interfaceSupport.hpp"
  52 #include "runtime/java.hpp"
  53 #include "runtime/memprofiler.hpp"
  54 #include "runtime/sharedRuntime.hpp"
  55 #include "runtime/statSampler.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   if (count > 0) {
 188     for (int index = 0; index < count; index++) {
 189       Method* m = collected_profiled_methods->at(index);
 190       ttyLocker ttyl;
 191       tty->print_cr("------------------------------------------------------------------------");
 192       //m->print_name(tty);
 193       m->print_invocation_count();
 194       tty->cr();
 195       m->print_codes();
 196     }
 197     tty->print_cr("------------------------------------------------------------------------");
 198   }
 199 }
 200 
 201 void print_bytecode_count() {
 202   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 203     tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
 204   }
 205 }
 206 
 207 AllocStats alloc_stats;
 208 
 209 
 210 
 211 // General statistics printing (profiling ...)
 212 
 213 void print_statistics() {
 214 
 215 #ifdef ASSERT
 216 
 217   if (CountRuntimeCalls) {
 218     extern Histogram *RuntimeHistogram;
 219     RuntimeHistogram->print();
 220   }
 221 
 222   if (CountJNICalls) {
 223     extern Histogram *JNIHistogram;
 224     JNIHistogram->print();
 225   }
 226 
 227   if (CountJVMCalls) {
 228     extern Histogram *JVMHistogram;
 229     JVMHistogram->print();
 230   }
 231 
 232 #endif
 233 
 234   if (MemProfiling) {
 235     MemProfiler::disengage();
 236   }
 237 
 238   if (CITime) {
 239     CompileBroker::print_times();
 240   }
 241 
 242 #ifdef COMPILER1
 243   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
 244     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
 245     Runtime1::print_statistics();
 246     Deoptimization::print_statistics();
 247     SharedRuntime::print_statistics();
 248     nmethod::print_statistics();
 249   }
 250 #endif /* COMPILER1 */
 251 
 252 #ifdef COMPILER2
 253   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
 254     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
 255     Compile::print_statistics();
 256 #ifndef COMPILER1
 257     Deoptimization::print_statistics();
 258     nmethod::print_statistics();
 259     SharedRuntime::print_statistics();
 260 #endif //COMPILER1
 261     os::print_statistics();
 262   }
 263 
 264   if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
 265     OptoRuntime::print_named_counters();
 266   }
 267 
 268   if (TimeLivenessAnalysis) {
 269     MethodLiveness::print_times();
 270   }
 271 #ifdef ASSERT
 272   if (CollectIndexSetStatistics) {
 273     IndexSet::print_statistics();
 274   }
 275 #endif // ASSERT
 276 #endif // COMPILER2
 277   if (CountCompiledCalls) {
 278     print_method_invocation_histogram();
 279   }
 280   if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
 281     print_method_profiling_data();
 282   }
 283   if (TimeCompiler) {
 284     COMPILER2_PRESENT(Compile::print_timers();)
 285   }
 286   if (TimeCompilationPolicy) {
 287     CompilationPolicy::policy()->print_time();
 288   }
 289   if (TimeOopMap) {
 290     GenerateOopMap::print_time();
 291   }
 292   if (ProfilerCheckIntervals) {
 293     PeriodicTask::print_intervals();
 294   }
 295   if (PrintSymbolTableSizeHistogram) {
 296     SymbolTable::print_histogram();
 297   }
 298   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 299     BytecodeCounter::print();
 300   }
 301   if (PrintBytecodePairHistogram) {
 302     BytecodePairHistogram::print();
 303   }
 304 
 305   if (PrintCodeCache) {
 306     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 307     CodeCache::print();
 308   }
 309 
 310   if (PrintCodeCache2) {
 311     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 312     CodeCache::print_internals();
 313   }
 314 
 315   if (PrintClassStatistics) {
 316     SystemDictionary::print_class_statistics();
 317   }
 318   if (PrintMethodStatistics) {
 319     SystemDictionary::print_method_statistics();
 320   }
 321 
 322   if (PrintVtableStats) {
 323     klassVtable::print_statistics();
 324     klassItable::print_statistics();
 325   }
 326   if (VerifyOops) {
 327     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
 328   }
 329 
 330   print_bytecode_count();
 331   if (PrintMallocStatistics) {
 332     tty->print("allocation stats: ");
 333     alloc_stats.print();
 334     tty->cr();
 335   }
 336 
 337   if (PrintSystemDictionaryAtExit) {
 338     SystemDictionary::print();
 339   }
 340 
 341   if (PrintBiasedLockingStatistics) {
 342     BiasedLocking::print_counters();
 343   }
 344 
 345 #ifdef ENABLE_ZAP_DEAD_LOCALS
 346 #ifdef COMPILER2
 347   if (ZapDeadCompiledLocals) {
 348     tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
 349     tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
 350   }
 351 #endif // COMPILER2
 352 #endif // ENABLE_ZAP_DEAD_LOCALS
 353   // Native memory tracking data
 354   if (PrintNMTStatistics) {
 355     if (MemTracker::is_on()) {
 356       BaselineTTYOutputer outputer(tty);
 357       MemTracker::print_memory_usage(outputer, K, false);
 358     } else {
 359       tty->print_cr(MemTracker::reason());
 360     }
 361   }
 362 }
 363 
 364 #else // PRODUCT MODE STATISTICS
 365 
 366 void print_statistics() {
 367 
 368   if (CITime) {
 369     CompileBroker::print_times();
 370   }
 371 
 372   if (PrintCodeCache) {
 373     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 374     CodeCache::print();
 375   }
 376 
 377 #ifdef COMPILER2
 378   if (PrintPreciseBiasedLockingStatistics) {
 379     OptoRuntime::print_named_counters();
 380   }
 381 #endif
 382   if (PrintBiasedLockingStatistics) {
 383     BiasedLocking::print_counters();
 384   }
 385 
 386   // Native memory tracking data
 387   if (PrintNMTStatistics) {
 388     if (MemTracker::is_on()) {
 389       BaselineTTYOutputer outputer(tty);
 390       MemTracker::print_memory_usage(outputer, K, false);
 391     } else {
 392       tty->print_cr(MemTracker::reason());
 393     }
 394   }
 395 }
 396 
 397 #endif
 398 
 399 
 400 // Helper class for registering on_exit calls through JVM_OnExit
 401 
 402 extern "C" {
 403     typedef void (*__exit_proc)(void);
 404 }
 405 
 406 class ExitProc : public CHeapObj<mtInternal> {
 407  private:
 408   __exit_proc _proc;
 409   // void (*_proc)(void);
 410   ExitProc* _next;
 411  public:
 412   // ExitProc(void (*proc)(void)) {
 413   ExitProc(__exit_proc proc) {
 414     _proc = proc;
 415     _next = NULL;
 416   }
 417   void evaluate()               { _proc(); }
 418   ExitProc* next() const        { return _next; }
 419   void set_next(ExitProc* next) { _next = next; }
 420 };
 421 
 422 
 423 // Linked list of registered on_exit procedures
 424 
 425 static ExitProc* exit_procs = NULL;
 426 
 427 
 428 extern "C" {
 429   void register_on_exit_function(void (*func)(void)) {
 430     ExitProc *entry = new ExitProc(func);
 431     // Classic vm does not throw an exception in case the allocation failed,
 432     if (entry != NULL) {
 433       entry->set_next(exit_procs);
 434       exit_procs = entry;
 435     }
 436   }
 437 }
 438 
 439 // Note: before_exit() can be executed only once, if more than one threads
 440 //       are trying to shutdown the VM at the same time, only one thread
 441 //       can run before_exit() and all other threads must wait.
 442 void before_exit(JavaThread * thread) {
 443   #define BEFORE_EXIT_NOT_RUN 0
 444   #define BEFORE_EXIT_RUNNING 1
 445   #define BEFORE_EXIT_DONE    2
 446   static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
 447 
 448   // Note: don't use a Mutex to guard the entire before_exit(), as
 449   // JVMTI post_thread_end_event and post_vm_death_event will run native code.
 450   // A CAS or OSMutex would work just fine but then we need to manipulate
 451   // thread state for Safepoint. Here we use Monitor wait() and notify_all()
 452   // for synchronization.
 453   { MutexLocker ml(BeforeExit_lock);
 454     switch (_before_exit_status) {
 455     case BEFORE_EXIT_NOT_RUN:
 456       _before_exit_status = BEFORE_EXIT_RUNNING;
 457       break;
 458     case BEFORE_EXIT_RUNNING:
 459       while (_before_exit_status == BEFORE_EXIT_RUNNING) {
 460         BeforeExit_lock->wait();
 461       }
 462       assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
 463       return;
 464     case BEFORE_EXIT_DONE:
 465       return;
 466     }
 467   }
 468 
 469   // The only difference between this and Win32's _onexit procs is that
 470   // this version is invoked before any threads get killed.
 471   ExitProc* current = exit_procs;
 472   while (current != NULL) {
 473     ExitProc* next = current->next();
 474     current->evaluate();
 475     delete current;
 476     current = next;
 477   }
 478 
 479   // Hang forever on exit if we're reporting an error.
 480   if (ShowMessageBoxOnError && is_error_reported()) {
 481     os::infinite_sleep();
 482   }
 483 
 484   // Terminate watcher thread - must before disenrolling any periodic task
 485   if (PeriodicTask::num_tasks() > 0)
 486     WatcherThread::stop();
 487 
 488   // Print statistics gathered (profiling ...)
 489   if (Arguments::has_profile()) {
 490     FlatProfiler::disengage();
 491     FlatProfiler::print(10);
 492   }
 493 
 494   // shut down the StatSampler task
 495   StatSampler::disengage();
 496   StatSampler::destroy();
 497 
 498   // We do not need to explicitly stop concurrent GC threads because the
 499   // JVM will be taken down at a safepoint when such threads are inactive --
 500   // except for some concurrent G1 threads, see (comment in)
 501   // Threads::destroy_vm().
 502 
 503   // Print GC/heap related information.
 504   if (PrintGCDetails) {
 505     Universe::print();
 506     AdaptiveSizePolicyOutput(0);
 507     if (Verbose) {
 508       ClassLoaderDataGraph::dump_on(gclog_or_tty);
 509     }
 510   }
 511 
 512 
 513   if (Arguments::has_alloc_profile()) {
 514     HandleMark hm;
 515     // Do one last collection to enumerate all the objects
 516     // allocated since the last one.
 517     Universe::heap()->collect(GCCause::_allocation_profiler);
 518     AllocationProfiler::disengage();
 519     AllocationProfiler::print(0);
 520   }
 521 
 522   if (PrintBytecodeHistogram) {
 523     BytecodeHistogram::print();
 524   }
 525 
 526   if (JvmtiExport::should_post_thread_life()) {
 527     JvmtiExport::post_thread_end(thread);
 528   }
 529 
 530 
 531   EventThreadEnd event;
 532   if (event.should_commit()) {
 533       event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
 534       event.commit();
 535   }
 536 
 537   // Always call even when there are not JVMTI environments yet, since environments
 538   // may be attached late and JVMTI must track phases of VM execution
 539   JvmtiExport::post_vm_death();
 540   Threads::shutdown_vm_agents();
 541 
 542   // Terminate the signal thread
 543   // Note: we don't wait until it actually dies.
 544   os::terminate_signal_thread();
 545 
 546   print_statistics();
 547   Universe::heap()->print_tracing_info();
 548 
 549   { MutexLocker ml(BeforeExit_lock);
 550     _before_exit_status = BEFORE_EXIT_DONE;
 551     BeforeExit_lock->notify_all();
 552   }
 553 
 554   // Shutdown NMT before exit. Otherwise,
 555   // it will run into trouble when system destroys static variables.
 556   MemTracker::shutdown(MemTracker::NMT_normal);
 557 
 558   #undef BEFORE_EXIT_NOT_RUN
 559   #undef BEFORE_EXIT_RUNNING
 560   #undef BEFORE_EXIT_DONE
 561 }
 562 
 563 void vm_exit(int code) {
 564   Thread* thread = ThreadLocalStorage::is_initialized() ?
 565     ThreadLocalStorage::get_thread_slow() : NULL;
 566   if (thread == NULL) {
 567     // we have serious problems -- just exit
 568     vm_direct_exit(code);
 569   }
 570 
 571   if (VMThread::vm_thread() != NULL) {
 572     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
 573     VM_Exit op(code);
 574     if (thread->is_Java_thread())
 575       ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
 576     VMThread::execute(&op);
 577     // should never reach here; but in case something wrong with VM Thread.
 578     vm_direct_exit(code);
 579   } else {
 580     // VM thread is gone, just exit
 581     vm_direct_exit(code);
 582   }
 583   ShouldNotReachHere();
 584 }
 585 
 586 void notify_vm_shutdown() {
 587   // For now, just a dtrace probe.
 588 #ifndef USDT2
 589   HS_DTRACE_PROBE(hotspot, vm__shutdown);
 590   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
 591 #else /* USDT2 */
 592   HOTSPOT_VM_SHUTDOWN();
 593 #endif /* USDT2 */
 594 }
 595 
 596 void vm_direct_exit(int code) {
 597   notify_vm_shutdown();
 598   os::wait_for_keypress_at_exit();
 599   ::exit(code);
 600 }
 601 
 602 void vm_perform_shutdown_actions() {
 603   // Warning: do not call 'exit_globals()' here. All threads are still running.
 604   // Calling 'exit_globals()' will disable thread-local-storage and cause all
 605   // kinds of assertions to trigger in debug mode.
 606   if (is_init_completed()) {
 607     Thread* thread = ThreadLocalStorage::is_initialized() ?
 608                      ThreadLocalStorage::get_thread_slow() : NULL;
 609     if (thread != NULL && thread->is_Java_thread()) {
 610       // We are leaving the VM, set state to native (in case any OS exit
 611       // handlers call back to the VM)
 612       JavaThread* jt = (JavaThread*)thread;
 613       // Must always be walkable or have no last_Java_frame when in
 614       // thread_in_native
 615       jt->frame_anchor()->make_walkable(jt);
 616       jt->set_thread_state(_thread_in_native);
 617     }
 618   }
 619   notify_vm_shutdown();
 620 }
 621 
 622 void vm_shutdown()
 623 {
 624   vm_perform_shutdown_actions();
 625   os::wait_for_keypress_at_exit();
 626   os::shutdown();
 627 }
 628 
 629 void vm_abort(bool dump_core) {
 630   vm_perform_shutdown_actions();
 631   os::wait_for_keypress_at_exit();
 632   os::abort(dump_core);
 633   ShouldNotReachHere();
 634 }
 635 
 636 void vm_notify_during_shutdown(const char* error, const char* message) {
 637   if (error != NULL) {
 638     tty->print_cr("Error occurred during initialization of VM");
 639     tty->print("%s", error);
 640     if (message != NULL) {
 641       tty->print_cr(": %s", message);
 642     }
 643     else {
 644       tty->cr();
 645     }
 646   }
 647   if (ShowMessageBoxOnError && WizardMode) {
 648     fatal("Error occurred during initialization of VM");
 649   }
 650 }
 651 
 652 void vm_exit_during_initialization(Handle exception) {
 653   tty->print_cr("Error occurred during initialization of VM");
 654   // If there are exceptions on this thread it must be cleared
 655   // first and here. Any future calls to EXCEPTION_MARK requires
 656   // that no pending exceptions exist.
 657   Thread *THREAD = Thread::current();
 658   if (HAS_PENDING_EXCEPTION) {
 659     CLEAR_PENDING_EXCEPTION;
 660   }
 661   java_lang_Throwable::print(exception, tty);
 662   tty->cr();
 663   java_lang_Throwable::print_stack_trace(exception(), tty);
 664   tty->cr();
 665   vm_notify_during_shutdown(NULL, NULL);
 666 
 667   // Failure during initialization, we don't want to dump core
 668   vm_abort(false);
 669 }
 670 
 671 void vm_exit_during_initialization(Symbol* ex, const char* message) {
 672   ResourceMark rm;
 673   vm_notify_during_shutdown(ex->as_C_string(), message);
 674 
 675   // Failure during initialization, we don't want to dump core
 676   vm_abort(false);
 677 }
 678 
 679 void vm_exit_during_initialization(const char* error, const char* message) {
 680   vm_notify_during_shutdown(error, message);
 681 
 682   // Failure during initialization, we don't want to dump core
 683   vm_abort(false);
 684 }
 685 
 686 void vm_shutdown_during_initialization(const char* error, const char* message) {
 687   vm_notify_during_shutdown(error, message);
 688   vm_shutdown();
 689 }
 690 
 691 JDK_Version JDK_Version::_current;
 692 const char* JDK_Version::_runtime_name;
 693 const char* JDK_Version::_runtime_version;
 694 
 695 void JDK_Version::initialize() {
 696   jdk_version_info info;
 697   assert(!_current.is_valid(), "Don't initialize twice");
 698 
 699   void *lib_handle = os::native_java_library();
 700   jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
 701      os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
 702 
 703   if (func == NULL) {
 704     // JDK older than 1.6
 705     _current._partially_initialized = true;
 706   } else {
 707     (*func)(&info, sizeof(info));
 708 
 709     int major = JDK_VERSION_MAJOR(info.jdk_version);
 710     int minor = JDK_VERSION_MINOR(info.jdk_version);
 711     int micro = JDK_VERSION_MICRO(info.jdk_version);
 712     int build = JDK_VERSION_BUILD(info.jdk_version);
 713     if (major == 1 && minor > 4) {
 714       // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
 715       major = minor;
 716       minor = micro;
 717       micro = 0;
 718     }
 719     _current = JDK_Version(major, minor, micro, info.update_version,
 720                            info.special_update_version, build,
 721                            info.thread_park_blocker == 1,
 722                            info.post_vm_init_hook_enabled == 1,
 723                            info.pending_list_uses_discovered_field == 1);
 724   }
 725 }
 726 
 727 void JDK_Version::fully_initialize(
 728     uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
 729   // This is only called when current is less than 1.6 and we've gotten
 730   // far enough in the initialization to determine the exact version.
 731   assert(major < 6, "not needed for JDK version >= 6");
 732   assert(is_partially_initialized(), "must not initialize");
 733   if (major < 5) {
 734     // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
 735     micro = minor;
 736     minor = major;
 737     major = 1;
 738   }
 739   _current = JDK_Version(major, minor, micro, update);
 740 }
 741 
 742 void JDK_Version_init() {
 743   JDK_Version::initialize();
 744 }
 745 
 746 static int64_t encode_jdk_version(const JDK_Version& v) {
 747   return
 748     ((int64_t)v.major_version()          << (BitsPerByte * 5)) |
 749     ((int64_t)v.minor_version()          << (BitsPerByte * 4)) |
 750     ((int64_t)v.micro_version()          << (BitsPerByte * 3)) |
 751     ((int64_t)v.update_version()         << (BitsPerByte * 2)) |
 752     ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
 753     ((int64_t)v.build_number()           << (BitsPerByte * 0));
 754 }
 755 
 756 int JDK_Version::compare(const JDK_Version& other) const {
 757   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
 758   if (!is_partially_initialized() && other.is_partially_initialized()) {
 759     return -(other.compare(*this)); // flip the comparators
 760   }
 761   assert(!other.is_partially_initialized(), "Not initialized yet");
 762   if (is_partially_initialized()) {
 763     assert(other.major_version() >= 6,
 764            "Invalid JDK version comparison during initialization");
 765     return -1;
 766   } else {
 767     uint64_t e = encode_jdk_version(*this);
 768     uint64_t o = encode_jdk_version(other);
 769     return (e > o) ? 1 : ((e == o) ? 0 : -1);
 770   }
 771 }
 772 
 773 void JDK_Version::to_string(char* buffer, size_t buflen) const {
 774   size_t index = 0;
 775   if (!is_valid()) {
 776     jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
 777   } else if (is_partially_initialized()) {
 778     jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
 779   } else {
 780     index += jio_snprintf(
 781         &buffer[index], buflen - index, "%d.%d", _major, _minor);
 782     if (_micro > 0) {
 783       index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
 784     }
 785     if (_update > 0) {
 786       index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
 787     }
 788     if (_special > 0) {
 789       index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
 790     }
 791     if (_build > 0) {
 792       index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
 793     }
 794   }
 795 }