       1 /*
       2  * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
       3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
       4  *
       5  * This code is free software; you can redistribute it and/or modify it
       6  * under the terms of the GNU General Public License version 2 only, as
       7  * published by the Free Software Foundation.
       8  *
       9  * This code is distributed in the hope that it will be useful, but WITHOUT
      10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      12  * version 2 for more details (a copy is included in the LICENSE file that
      13  * accompanied this code).
      14  *
      15  * You should have received a copy of the GNU General Public License version
      16  * 2 along with this work; if not, write to the Free Software Foundation,
      17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
      18  *
      19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
      20  * or visit www.oracle.com if you need additional information or have any
      21  * questions.
      22  *
      23  */
      24
      25 #include "precompiled.hpp"
      26 #include "classfile/classLoader.hpp"
      27 #include "classfile/symbolTable.hpp"
      28 #include "classfile/systemDictionary.hpp"
      29 #include "code/codeCache.hpp"
      30 #include "compiler/compileBroker.hpp"
      31 #include "compiler/compilerOracle.hpp"
      32 #include "interpreter/bytecodeHistogram.hpp"
      33 #include "memory/genCollectedHeap.hpp"
      34 #include "memory/oopFactory.hpp"
      35 #include "memory/universe.hpp"
      36 #include "oops/constantPool.hpp"
      37 #include "oops/generateOopMap.hpp"
      38 #include "oops/instanceKlass.hpp"
      39 #include "oops/instanceOop.hpp"
      40 #include "oops/method.hpp"
      41 #include "oops/objArrayOop.hpp"
      42 #include "oops/oop.inline.hpp"
      43 #include "oops/symbol.hpp"
      44 #include "prims/jvmtiExport.hpp"
      45 #include "runtime/arguments.hpp"
      46 #include "runtime/biasedLocking.hpp"
      47 #include "runtime/compilationPolicy.hpp"
      48 #include "runtime/fprofiler.hpp"
      49 #include "runtime/init.hpp"
      50 #include "runtime/interfaceSupport.hpp"
      51 #include "runtime/java.hpp"
      52 #include "runtime/memprofiler.hpp"
      53 #include "runtime/sharedRuntime.hpp"
      54 #include "runtime/statSampler.hpp"
      55 #include "runtime/sweeper.hpp"
      56 #include "runtime/task.hpp"
      57 #include "runtime/thread.inline.hpp"
      58 #include "runtime/timer.hpp"
      59 #include "runtime/vm_operations.hpp"
      60 #include "services/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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
     116
     117 GrowableArray<Method*>* collected_profiled_methods;
     118
     119 void collect_profiled_methods(Method* m) {
     120   Thread* thread = Thread::current();
     121   // This HandleMark prevents a huge amount of handles from being added
     122   // to the metadata_handles() array on the thread.
     123   HandleMark hm(thread);
     124   methodHandle mh(thread, m);
     125   if ((m->method_data() != NULL) &&
     126       (PrintMethodData || CompilerOracle::should_print(mh))) {
     127     collected_profiled_methods->push(m);
     128   }
     129 }
     130
     131
     132 int compare_methods(Method** a, Method** b) {
     133   // %%% there can be 32-bit overflow here
     134   return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
     135        - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
     136 }
     137
     138
     139 void print_method_invocation_histogram() {
     140   ResourceMark rm;
     141   HandleMark hm;
     142   collected_invoked_methods = new GrowableArray<Method*>(1024);
     143   SystemDictionary::methods_do(collect_invoked_methods);
     144   collected_invoked_methods->sort(&compare_methods);
     145   //
     146   tty->cr();
     147   tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
     148   tty->cr();
     149   tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
     150   unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
     151       synch_total = 0, nativ_total = 0, acces_total = 0;
     152   for (int index = 0; index < collected_invoked_methods->length(); index++) {
     153     Method* m = collected_invoked_methods->at(index);
     154     int c = m->invocation_count() + m->compiled_invocation_count();
     155     if (c >= MethodHistogramCutoff) m->print_invocation_count();
     156     int_total  += m->invocation_count();
     157     comp_total += m->compiled_invocation_count();
     158     if (m->is_final())        final_total  += c;
     159     if (m->is_static())       static_total += c;
     160     if (m->is_synchronized()) synch_total  += c;
     161     if (m->is_native())       nativ_total  += c;
     162     if (m->is_accessor())     acces_total  += c;
     163   }
     164   tty->cr();
     165   total = int_total + comp_total;
     166   tty->print_cr("Invocations summary:");
     167   tty->print_cr("\t%9d (%4.1f%%) interpreted",  int_total,    100.0 * int_total    / total);
     168   tty->print_cr("\t%9d (%4.1f%%) compiled",     comp_total,   100.0 * comp_total   / total);
     169   tty->print_cr("\t%9d (100%%)  total",         total);
     170   tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total,  100.0 * synch_total  / total);
     171   tty->print_cr("\t%9d (%4.1f%%) final",        final_total,  100.0 * final_total  / total);
     172   tty->print_cr("\t%9d (%4.1f%%) static",       static_total, 100.0 * static_total / total);
     173   tty->print_cr("\t%9d (%4.1f%%) native",       nativ_total,  100.0 * nativ_total  / total);
     174   tty->print_cr("\t%9d (%4.1f%%) accessor",     acces_total,  100.0 * acces_total  / total);
     175   tty->cr();
     176   SharedRuntime::print_call_statistics(comp_total);
     177 }
     178
     179 void print_method_profiling_data() {
     180   ResourceMark rm;
     181   HandleMark hm;
     182   collected_profiled_methods = new GrowableArray<Method*>(1024);
     183   SystemDictionary::methods_do(collect_profiled_methods);
     184   collected_profiled_methods->sort(&compare_methods);
     185
     186   int count = collected_profiled_methods->length();
     187   int total_size = 0;
     188   if (count > 0) {
     189     for (int index = 0; index < count; index++) {
     190       Method* m = collected_profiled_methods->at(index);
     191       ttyLocker ttyl;
     192       tty->print_cr("------------------------------------------------------------------------");
     193       //m->print_name(tty);
     194       m->print_invocation_count();
     195       tty->print_cr("  mdo size: %d bytes", m->method_data()->size_in_bytes());
     196       tty->cr();
     197       // Dump data on parameters if any
     198       if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
     199         tty->fill_to(2);
     200         m->method_data()->parameters_type_data()->print_data_on(tty);
     201       }
     202       m->print_codes();
     203       total_size += m->method_data()->size_in_bytes();
     204     }
     205     tty->print_cr("------------------------------------------------------------------------");
     206     tty->print_cr("Total MDO size: %d bytes", total_size);
     207   }
     208 }
     209
     210 void print_bytecode_count() {
     211   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
     212     tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
     213   }
     214 }
     215
     216 AllocStats alloc_stats;
     217
     218
     219
     220 // General statistics printing (profiling ...)
     221 void print_statistics() {
     222 #ifdef ASSERT
     223
     224   if (CountRuntimeCalls) {
     225     extern Histogram *RuntimeHistogram;
     226     RuntimeHistogram->print();
     227   }
     228
     229   if (CountJNICalls) {
     230     extern Histogram *JNIHistogram;
     231     JNIHistogram->print();
     232   }
     233
     234   if (CountJVMCalls) {
     235     extern Histogram *JVMHistogram;
     236     JVMHistogram->print();
     237   }
     238
     239 #endif
     240
     241   if (MemProfiling) {
     242     MemProfiler::disengage();
     243   }
     244
     245   if (CITime) {
     246     CompileBroker::print_times();
     247   }
     248
     249 #ifdef COMPILER1
     250   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
     251     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
     252     Runtime1::print_statistics();
     253     Deoptimization::print_statistics();
     254     SharedRuntime::print_statistics();
     255     nmethod::print_statistics();
     256   }
     257 #endif /* COMPILER1 */
     258
     259 #ifdef COMPILER2
     260   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
     261     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
     262     Compile::print_statistics();
     263 #ifndef COMPILER1
     264     Deoptimization::print_statistics();
     265     nmethod::print_statistics();
     266     SharedRuntime::print_statistics();
     267 #endif //COMPILER1
     268     os::print_statistics();
     269   }
     270
     271   if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
     272     OptoRuntime::print_named_counters();
     273   }
     274
     275   if (TimeLivenessAnalysis) {
     276     MethodLiveness::print_times();
     277   }
     278 #ifdef ASSERT
     279   if (CollectIndexSetStatistics) {
     280     IndexSet::print_statistics();
     281   }
     282 #endif // ASSERT
     283 #endif // COMPILER2
     284   if (CountCompiledCalls) {
     285     print_method_invocation_histogram();
     286   }
     287   if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
     288     print_method_profiling_data();
     289   }
     290   if (TimeCompiler) {
     291     COMPILER2_PRESENT(Compile::print_timers();)
     292   }
     293   if (TimeCompilationPolicy) {
     294     CompilationPolicy::policy()->print_time();
     295   }
     296   if (TimeOopMap) {
     297     GenerateOopMap::print_time();
     298   }
     299   if (ProfilerCheckIntervals) {
     300     PeriodicTask::print_intervals();
     301   }
     302   if (PrintSymbolTableSizeHistogram) {
     303     SymbolTable::print_histogram();
     304   }
     305   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
     306     BytecodeCounter::print();
     307   }
     308   if (PrintBytecodePairHistogram) {
     309     BytecodePairHistogram::print();
     310   }
     311
     312   if (PrintCodeCache) {
     313     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
     314     CodeCache::print();
     315   }
     316
     317   if (PrintMethodFlushingStatistics) {
     318     NMethodSweeper::print();
     319   }
     320
     321   if (PrintCodeCache2) {
     322     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
     323     CodeCache::print_internals();
     324   }
     325
     326   if (PrintClassStatistics) {
     327     SystemDictionary::print_class_statistics();
     328   }
     329   if (PrintMethodStatistics) {
     330     SystemDictionary::print_method_statistics();
     331   }
     332
     333   if (PrintVtableStats) {
     334     klassVtable::print_statistics();
     335     klassItable::print_statistics();
     336   }
     337   if (VerifyOops) {
     338     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
     339   }
     340
     341   print_bytecode_count();
     342   if (PrintMallocStatistics) {
     343     tty->print("allocation stats: ");
     344     alloc_stats.print();
     345     tty->cr();
     346   }
     347
     348   if (PrintSystemDictionaryAtExit) {
     349     SystemDictionary::print();
     350   }
     351
     352   if (PrintBiasedLockingStatistics) {
     353     BiasedLocking::print_counters();
     354   }
     355
     356 #ifdef ENABLE_ZAP_DEAD_LOCALS
     357 #ifdef COMPILER2
     358   if (ZapDeadCompiledLocals) {
     359     tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
     360     tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
     361   }
     362 #endif // COMPILER2
     363 #endif // ENABLE_ZAP_DEAD_LOCALS
     364   // Native memory tracking data
     365   if (PrintNMTStatistics) {
     366     MemTracker::final_report(tty);
     367   }
     368 }
     369
     370 #else // PRODUCT MODE STATISTICS
     371
     372 void print_statistics() {
     373
     374   if (CITime) {
     375     CompileBroker::print_times();
     376   }
     377
     378   if (PrintCodeCache) {
     379     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
     380     CodeCache::print();
     381   }
     382
     383   if (PrintMethodFlushingStatistics) {
     384     NMethodSweeper::print();
     385   }
     386
     387 #ifdef COMPILER2
     388   if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
     389     OptoRuntime::print_named_counters();
     390   }
     391 #endif
     392   if (PrintBiasedLockingStatistics) {
     393     BiasedLocking::print_counters();
     394   }
     395
     396   // Native memory tracking data
     397   if (PrintNMTStatistics) {
     398     MemTracker::final_report(tty);
     399   }
     400 }
     401
     402 #endif
     403
     404
     405 // Helper class for registering on_exit calls through JVM_OnExit
     406
     407 extern "C" {
     408     typedef void (*__exit_proc)(void);
     409 }
     410
     411 class ExitProc : public CHeapObj<mtInternal> {
     412  private:
     413   __exit_proc _proc;
     414   // void (*_proc)(void);
     415   ExitProc* _next;
     416  public:
     417   // ExitProc(void (*proc)(void)) {
     418   ExitProc(__exit_proc proc) {
     419     _proc = proc;
     420     _next = NULL;
     421   }
     422   void evaluate()               { _proc(); }
     423   ExitProc* next() const        { return _next; }
     424   void set_next(ExitProc* next) { _next = next; }
     425 };
     426
     427
     428 // Linked list of registered on_exit procedures
     429
     430 static ExitProc* exit_procs = NULL;
     431
     432
     433 extern "C" {
     434   void register_on_exit_function(void (*func)(void)) {
     435     ExitProc *entry = new ExitProc(func);
     436     // Classic vm does not throw an exception in case the allocation failed,
     437     if (entry != NULL) {
     438       entry->set_next(exit_procs);
     439       exit_procs = entry;
     440     }
     441   }
     442 }
     443
     444 // Note: before_exit() can be executed only once, if more than one threads
     445 //       are trying to shutdown the VM at the same time, only one thread
     446 //       can run before_exit() and all other threads must wait.
     447 void before_exit(JavaThread * thread) {
     448   #define BEFORE_EXIT_NOT_RUN 0
     449   #define BEFORE_EXIT_RUNNING 1
     450   #define BEFORE_EXIT_DONE    2
     451   static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
     452
     453   // Note: don't use a Mutex to guard the entire before_exit(), as
     454   // JVMTI post_thread_end_event and post_vm_death_event will run native code.
     455   // A CAS or OSMutex would work just fine but then we need to manipulate
     456   // thread state for Safepoint. Here we use Monitor wait() and notify_all()
     457   // for synchronization.
     458   { MutexLocker ml(BeforeExit_lock);
     459     switch (_before_exit_status) {
     460     case BEFORE_EXIT_NOT_RUN:
     461       _before_exit_status = BEFORE_EXIT_RUNNING;
     462       break;
     463     case BEFORE_EXIT_RUNNING:
     464       while (_before_exit_status == BEFORE_EXIT_RUNNING) {
     465         BeforeExit_lock->wait();
     466       }
     467       assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
     468       return;
     469     case BEFORE_EXIT_DONE:
     470       return;
     471     }
     472   }
     473
     474   // The only difference between this and Win32's _onexit procs is that
     475   // this version is invoked before any threads get killed.
     476   ExitProc* current = exit_procs;
     477   while (current != NULL) {
     478     ExitProc* next = current->next();
     479     current->evaluate();
     480     delete current;
     481     current = next;
     482   }
     483
     484   // Hang forever on exit if we're reporting an error.
     485   if (ShowMessageBoxOnError && is_error_reported()) {
     486     os::infinite_sleep();
     487   }
     488
     489   // Terminate watcher thread - must before disenrolling any periodic task
     490   if (PeriodicTask::num_tasks() > 0)
     491     WatcherThread::stop();
     492
     493   // Print statistics gathered (profiling ...)
     494   if (Arguments::has_profile()) {
     495     FlatProfiler::disengage();
     496     FlatProfiler::print(10);
     497   }
     498
     499   // shut down the StatSampler task
     500   StatSampler::disengage();
     501   StatSampler::destroy();
     502
     503   // Stop concurrent GC threads
     504   Universe::heap()->stop();
     505
     506   // Print GC/heap related information.
     507   if (PrintGCDetails) {
     508     Universe::print();
     509     AdaptiveSizePolicyOutput(0);
     510     if (Verbose) {
     511       ClassLoaderDataGraph::dump_on(gclog_or_tty);
     512     }
     513   }
     514
     515   if (PrintBytecodeHistogram) {
     516     BytecodeHistogram::print();
     517   }
     518
     519   if (JvmtiExport::should_post_thread_life()) {
     520     JvmtiExport::post_thread_end(thread);
     521   }
     522
     523
     524   EventThreadEnd event;
     525   if (event.should_commit()) {
     526       event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
     527       event.commit();
     528   }
     529
     530   // Always call even when there are not JVMTI environments yet, since environments
     531   // may be attached late and JVMTI must track phases of VM execution
     532   JvmtiExport::post_vm_death();
     533   Threads::shutdown_vm_agents();
     534
     535   // Terminate the signal thread
     536   // Note: we don't wait until it actually dies.
     537   os::terminate_signal_thread();
     538
     539   print_statistics();
     540   Universe::heap()->print_tracing_info();
     541
     542   { MutexLocker ml(BeforeExit_lock);
     543     _before_exit_status = BEFORE_EXIT_DONE;
     544     BeforeExit_lock->notify_all();
     545   }
     546
     547   if (VerifyStringTableAtExit) {
     548     int fail_cnt = 0;
     549     {
     550       MutexLocker ml(StringTable_lock);
     551       fail_cnt = StringTable::verify_and_compare_entries();
     552     }
     553
     554     if (fail_cnt != 0) {
     555       tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
     556       guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
     557     }
     558   }
     559
     560   #undef BEFORE_EXIT_NOT_RUN
     561   #undef BEFORE_EXIT_RUNNING
     562   #undef BEFORE_EXIT_DONE
     563 }
     564
     565 void vm_exit(int code) {
     566   Thread* thread = ThreadLocalStorage::is_initialized() ?
     567     ThreadLocalStorage::get_thread_slow() : NULL;
     568   if (thread == NULL) {
     569     // we have serious problems -- just exit
     570     vm_direct_exit(code);
     571   }
     572
     573   if (VMThread::vm_thread() != NULL) {
     574     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
     575     VM_Exit op(code);
     576     if (thread->is_Java_thread())
     577       ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
     578     VMThread::execute(&op);
     579     // should never reach here; but in case something wrong with VM Thread.
     580     vm_direct_exit(code);
     581   } else {
     582     // VM thread is gone, just exit
     583     vm_direct_exit(code);
     584   }
     585   ShouldNotReachHere();
     586 }
     587
     588 void notify_vm_shutdown() {
     589   // For now, just a dtrace probe.
     590 #ifndef USDT2
     591   HS_DTRACE_PROBE(hotspot, vm__shutdown);
     592   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
     593 #else /* USDT2 */
     594   HOTSPOT_VM_SHUTDOWN();
     595 #endif /* USDT2 */
     596 }
     597
     598 void vm_direct_exit(int code) {
     599   notify_vm_shutdown();
     600   os::wait_for_keypress_at_exit();
     601   ::exit(code);
     602 }
     603
     604 void vm_perform_shutdown_actions() {
     605   // Warning: do not call 'exit_globals()' here. All threads are still running.
     606   // Calling 'exit_globals()' will disable thread-local-storage and cause all
     607   // kinds of assertions to trigger in debug mode.
     608   if (is_init_completed()) {
     609     Thread* thread = ThreadLocalStorage::is_initialized() ?
     610                      ThreadLocalStorage::get_thread_slow() : NULL;
     611     if (thread != NULL && thread->is_Java_thread()) {
     612       // We are leaving the VM, set state to native (in case any OS exit
     613       // handlers call back to the VM)
     614       JavaThread* jt = (JavaThread*)thread;
     615       // Must always be walkable or have no last_Java_frame when in
     616       // thread_in_native
     617       jt->frame_anchor()->make_walkable(jt);
     618       jt->set_thread_state(_thread_in_native);
     619     }
     620   }
     621   notify_vm_shutdown();
     622 }
     623
     624 void vm_shutdown()
     625 {
     626   vm_perform_shutdown_actions();
     627   os::wait_for_keypress_at_exit();
     628   os::shutdown();
     629 }
     630
     631 void vm_abort(bool dump_core) {
     632   vm_perform_shutdown_actions();
     633   os::wait_for_keypress_at_exit();
     634   os::abort(dump_core);
     635   ShouldNotReachHere();
     636 }
     637
     638 void vm_notify_during_shutdown(const char* error, const char* message) {
     639   if (error != NULL) {
     640     tty->print_cr("Error occurred during initialization of VM");
     641     tty->print("%s", error);
     642     if (message != NULL) {
     643       tty->print_cr(": %s", message);
     644     }
     645     else {
     646       tty->cr();
     647     }
     648   }
     649   if (ShowMessageBoxOnError && WizardMode) {
     650     fatal("Error occurred during initialization of VM");
     651   }
     652 }
     653
     654 void vm_exit_during_initialization(Handle exception) {
     655   tty->print_cr("Error occurred during initialization of VM");
     656   // If there are exceptions on this thread it must be cleared
     657   // first and here. Any future calls to EXCEPTION_MARK requires
     658   // that no pending exceptions exist.
     659   Thread *THREAD = Thread::current();
     660   if (HAS_PENDING_EXCEPTION) {
     661     CLEAR_PENDING_EXCEPTION;
     662   }
     663   java_lang_Throwable::print(exception, tty);
     664   tty->cr();
     665   java_lang_Throwable::print_stack_trace(exception(), tty);
     666   tty->cr();
     667   vm_notify_during_shutdown(NULL, NULL);
     668
     669   // Failure during initialization, we don't want to dump core
     670   vm_abort(false);
     671 }
     672
     673 void vm_exit_during_initialization(Symbol* ex, const char* message) {
     674   ResourceMark rm;
     675   vm_notify_during_shutdown(ex->as_C_string(), message);
     676
     677   // Failure during initialization, we don't want to dump core
     678   vm_abort(false);
     679 }
     680
     681 void vm_exit_during_initialization(const char* error, const char* message) {
     682   vm_notify_during_shutdown(error, message);
     683
     684   // Failure during initialization, we don't want to dump core
     685   vm_abort(false);
     686 }
     687
     688 void vm_shutdown_during_initialization(const char* error, const char* message) {
     689   vm_notify_during_shutdown(error, message);
     690   vm_shutdown();
     691 }
     692
     693 JDK_Version JDK_Version::_current;
     694 const char* JDK_Version::_runtime_name;
     695 const char* JDK_Version::_runtime_version;
     696
     697 void JDK_Version::initialize() {
     698   jdk_version_info info;
     699   assert(!_current.is_valid(), "Don't initialize twice");
     700
     701   void *lib_handle = os::native_java_library();
     702   jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
     703      os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
     704
     705   if (func == NULL) {
     706     // JDK older than 1.6
     707     _current._partially_initialized = true;
     708   } else {
     709     (*func)(&info, sizeof(info));
     710
     711     int major = JDK_VERSION_MAJOR(info.jdk_version);
     712     int minor = JDK_VERSION_MINOR(info.jdk_version);
     713     int micro = JDK_VERSION_MICRO(info.jdk_version);
     714     int build = JDK_VERSION_BUILD(info.jdk_version);
     715     if (major == 1 && minor > 4) {
     716       // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
     717       major = minor;
     718       minor = micro;
     719       micro = 0;
     720     }
     721     _current = JDK_Version(major, minor, micro, info.update_version,
     722                            info.special_update_version, build,
     723                            info.thread_park_blocker == 1,
     724                            info.post_vm_init_hook_enabled == 1,
     725                            info.pending_list_uses_discovered_field == 1);
     726   }
     727 }
     728
     729 void JDK_Version::fully_initialize(
     730     uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
     731   // This is only called when current is less than 1.6 and we've gotten
     732   // far enough in the initialization to determine the exact version.
     733   assert(major < 6, "not needed for JDK version >= 6");
     734   assert(is_partially_initialized(), "must not initialize");
     735   if (major < 5) {
     736     // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
     737     micro = minor;
     738     minor = major;
     739     major = 1;
     740   }
     741   _current = JDK_Version(major, minor, micro, update);
     742 }
     743
     744 void JDK_Version_init() {
     745   JDK_Version::initialize();
     746 }
     747
     748 static int64_t encode_jdk_version(const JDK_Version& v) {
     749   return
     750     ((int64_t)v.major_version()          << (BitsPerByte * 5)) |
     751     ((int64_t)v.minor_version()          << (BitsPerByte * 4)) |
     752     ((int64_t)v.micro_version()          << (BitsPerByte * 3)) |
     753     ((int64_t)v.update_version()         << (BitsPerByte * 2)) |
     754     ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
     755     ((int64_t)v.build_number()           << (BitsPerByte * 0));
     756 }
     757
     758 int JDK_Version::compare(const JDK_Version& other) const {
     759   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
     760   if (!is_partially_initialized() && other.is_partially_initialized()) {
     761     return -(other.compare(*this)); // flip the comparators
     762   }
     763   assert(!other.is_partially_initialized(), "Not initialized yet");
     764   if (is_partially_initialized()) {
     765     assert(other.major_version() >= 6,
     766            "Invalid JDK version comparison during initialization");
     767     return -1;
     768   } else {
     769     uint64_t e = encode_jdk_version(*this);
     770     uint64_t o = encode_jdk_version(other);
     771     return (e > o) ? 1 : ((e == o) ? 0 : -1);
     772   }
     773 }
     774
     775 void JDK_Version::to_string(char* buffer, size_t buflen) const {
     776   size_t index = 0;
     777   if (!is_valid()) {
     778     jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
     779   } else if (is_partially_initialized()) {
     780     jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
     781   } else {
     782     index += jio_snprintf(
     783         &buffer[index], buflen - index, "%d.%d", _major, _minor);
     784     if (_micro > 0) {
     785       index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
     786     }
     787     if (_update > 0) {
     788       index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
     789     }
     790     if (_special > 0) {
     791       index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
     792     }
     793     if (_build > 0) {
     794       index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
     795     }
     796   }
     797 }