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 (PrintCodeCacheDetails) {
 310     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 311     CodeCache::print_details();
 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 }