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/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/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 
 101 GrowableArray<Method*>* collected_profiled_methods;
 102 
 103 int compare_methods(Method** a, Method** b) {
 104   // %%% there can be 32-bit overflow here
 105   return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
 106        - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
 107 }
 108 
 109 void collect_profiled_methods(Method* m) {
 110   Thread* thread = Thread::current();
 111   // This HandleMark prevents a huge amount of handles from being added
 112   // to the metadata_handles() array on the thread.
 113   HandleMark hm(thread);
 114   methodHandle mh(thread, m);
 115   if ((m->method_data() != NULL) &&
 116       (PrintMethodData || CompilerOracle::should_print(mh))) {
 117     collected_profiled_methods->push(m);
 118   }
 119 }
 120 
 121 void print_method_profiling_data() {
 122   if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
 123     ResourceMark rm;
 124     HandleMark hm;
 125     collected_profiled_methods = new GrowableArray<Method*>(1024);
 126     ClassLoaderDataGraph::methods_do(collect_profiled_methods);
 127     collected_profiled_methods->sort(&compare_methods);
 128 
 129     int count = collected_profiled_methods->length();
 130     int total_size = 0;
 131     if (count > 0) {
 132       for (int index = 0; index < count; index++) {
 133         Method* m = collected_profiled_methods->at(index);
 134         ttyLocker ttyl;
 135         tty->print_cr("------------------------------------------------------------------------");
 136         m->print_invocation_count();
 137         tty->print_cr("  mdo size: %d bytes", m->method_data()->size_in_bytes());
 138         tty->cr();
 139         // Dump data on parameters if any
 140         if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
 141           tty->fill_to(2);
 142           m->method_data()->parameters_type_data()->print_data_on(tty);
 143         }
 144         m->print_codes();
 145         total_size += m->method_data()->size_in_bytes();
 146       }
 147       tty->print_cr("------------------------------------------------------------------------");
 148       tty->print_cr("Total MDO size: %d bytes", total_size);
 149     }
 150   }
 151 }
 152 
 153 
 154 #ifndef PRODUCT
 155 
 156 // Statistics printing (method invocation histogram)
 157 
 158 GrowableArray<Method*>* collected_invoked_methods;
 159 
 160 void collect_invoked_methods(Method* m) {
 161   if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
 162     collected_invoked_methods->push(m);
 163   }
 164 }
 165 
 166 
 167 
 168 
 169 void print_method_invocation_histogram() {
 170   ResourceMark rm;
 171   HandleMark hm;
 172   collected_invoked_methods = new GrowableArray<Method*>(1024);
 173   SystemDictionary::methods_do(collect_invoked_methods);
 174   collected_invoked_methods->sort(&compare_methods);
 175   //
 176   tty->cr();
 177   tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
 178   tty->cr();
 179   tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
 180   unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
 181       synch_total = 0, nativ_total = 0, acces_total = 0;
 182   for (int index = 0; index < collected_invoked_methods->length(); index++) {
 183     Method* m = collected_invoked_methods->at(index);
 184     int c = m->invocation_count() + m->compiled_invocation_count();
 185     if (c >= MethodHistogramCutoff) m->print_invocation_count();
 186     int_total  += m->invocation_count();
 187     comp_total += m->compiled_invocation_count();
 188     if (m->is_final())        final_total  += c;
 189     if (m->is_static())       static_total += c;
 190     if (m->is_synchronized()) synch_total  += c;
 191     if (m->is_native())       nativ_total  += c;
 192     if (m->is_accessor())     acces_total  += c;
 193   }
 194   tty->cr();
 195   total = int_total + comp_total;
 196   tty->print_cr("Invocations summary:");
 197   tty->print_cr("\t%9d (%4.1f%%) interpreted",  int_total,    100.0 * int_total    / total);
 198   tty->print_cr("\t%9d (%4.1f%%) compiled",     comp_total,   100.0 * comp_total   / total);
 199   tty->print_cr("\t%9d (100%%)  total",         total);
 200   tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total,  100.0 * synch_total  / total);
 201   tty->print_cr("\t%9d (%4.1f%%) final",        final_total,  100.0 * final_total  / total);
 202   tty->print_cr("\t%9d (%4.1f%%) static",       static_total, 100.0 * static_total / total);
 203   tty->print_cr("\t%9d (%4.1f%%) native",       nativ_total,  100.0 * nativ_total  / total);
 204   tty->print_cr("\t%9d (%4.1f%%) accessor",     acces_total,  100.0 * acces_total  / total);
 205   tty->cr();
 206   SharedRuntime::print_call_statistics(comp_total);
 207 }
 208 
 209 void print_bytecode_count() {
 210   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 211     tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
 212   }
 213 }
 214 
 215 AllocStats alloc_stats;
 216 
 217 
 218 
 219 // General statistics printing (profiling ...)
 220 void print_statistics() {
 221 #ifdef ASSERT
 222 
 223   if (CountRuntimeCalls) {
 224     extern Histogram *RuntimeHistogram;
 225     RuntimeHistogram->print();
 226   }
 227 
 228   if (CountJNICalls) {
 229     extern Histogram *JNIHistogram;
 230     JNIHistogram->print();
 231   }
 232 
 233   if (CountJVMCalls) {
 234     extern Histogram *JVMHistogram;
 235     JVMHistogram->print();
 236   }
 237 
 238 #endif
 239 
 240   if (MemProfiling) {
 241     MemProfiler::disengage();
 242   }
 243 
 244   if (CITime) {
 245     CompileBroker::print_times();
 246   }
 247 
 248 #ifdef COMPILER1
 249   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
 250     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
 251     Runtime1::print_statistics();
 252     Deoptimization::print_statistics();
 253     SharedRuntime::print_statistics();
 254     nmethod::print_statistics();
 255   }
 256 #endif /* COMPILER1 */
 257 
 258 #ifdef COMPILER2
 259   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
 260     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
 261     Compile::print_statistics();
 262 #ifndef COMPILER1
 263     Deoptimization::print_statistics();
 264     nmethod::print_statistics();
 265     SharedRuntime::print_statistics();
 266 #endif //COMPILER1
 267     os::print_statistics();
 268   }
 269 
 270   if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 271     OptoRuntime::print_named_counters();
 272   }
 273 
 274   if (TimeLivenessAnalysis) {
 275     MethodLiveness::print_times();
 276   }
 277 #ifdef ASSERT
 278   if (CollectIndexSetStatistics) {
 279     IndexSet::print_statistics();
 280   }
 281 #endif // ASSERT
 282 #endif // COMPILER2
 283   if (CountCompiledCalls) {
 284     print_method_invocation_histogram();
 285   }
 286 
 287   print_method_profiling_data();
 288 
 289   if (TimeCompiler) {
 290     COMPILER2_PRESENT(Compile::print_timers();)
 291   }
 292   if (TimeCompilationPolicy) {
 293     CompilationPolicy::policy()->print_time();
 294   }
 295   if (TimeOopMap) {
 296     GenerateOopMap::print_time();
 297   }
 298   if (ProfilerCheckIntervals) {
 299     PeriodicTask::print_intervals();
 300   }
 301   if (PrintSymbolTableSizeHistogram) {
 302     SymbolTable::print_histogram();
 303   }
 304   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 305     BytecodeCounter::print();
 306   }
 307   if (PrintBytecodePairHistogram) {
 308     BytecodePairHistogram::print();
 309   }
 310 
 311   if (PrintCodeCache) {
 312     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 313     CodeCache::print();
 314   }
 315 
 316   if (PrintMethodFlushingStatistics) {
 317     NMethodSweeper::print();
 318   }
 319 
 320   if (PrintCodeCache2) {
 321     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 322     CodeCache::print_internals();
 323   }
 324 
 325   if (PrintClassStatistics) {
 326     SystemDictionary::print_class_statistics();
 327   }
 328   if (PrintMethodStatistics) {
 329     SystemDictionary::print_method_statistics();
 330   }
 331 
 332   if (PrintVtableStats) {
 333     klassVtable::print_statistics();
 334     klassItable::print_statistics();
 335   }
 336   if (VerifyOops) {
 337     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
 338   }
 339 
 340   print_bytecode_count();
 341   if (PrintMallocStatistics) {
 342     tty->print("allocation stats: ");
 343     alloc_stats.print();
 344     tty->cr();
 345   }
 346 
 347   if (PrintSystemDictionaryAtExit) {
 348     SystemDictionary::print();
 349   }
 350 
 351   if (PrintBiasedLockingStatistics) {
 352     BiasedLocking::print_counters();
 353   }
 354 
 355 #ifdef ENABLE_ZAP_DEAD_LOCALS
 356 #ifdef COMPILER2
 357   if (ZapDeadCompiledLocals) {
 358     tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
 359     tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
 360   }
 361 #endif // COMPILER2
 362 #endif // ENABLE_ZAP_DEAD_LOCALS
 363   // Native memory tracking data
 364   if (PrintNMTStatistics) {
 365     if (MemTracker::is_on()) {
 366       BaselineTTYOutputer outputer(tty);
 367       MemTracker::print_memory_usage(outputer, K, false);
 368     } else {
 369       tty->print_cr(MemTracker::reason());
 370     }
 371   }
 372 }
 373 
 374 #else // PRODUCT MODE STATISTICS
 375 
 376 void print_statistics() {
 377 
 378   if (PrintMethodData) {
 379     print_method_profiling_data();
 380   }
 381 
 382   if (CITime) {
 383     CompileBroker::print_times();
 384   }
 385 
 386   if (PrintCodeCache) {
 387     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 388     CodeCache::print();
 389   }
 390 
 391   if (PrintMethodFlushingStatistics) {
 392     NMethodSweeper::print();
 393   }
 394 
 395 #ifdef COMPILER2
 396   if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 397     OptoRuntime::print_named_counters();
 398   }
 399 #endif
 400   if (PrintBiasedLockingStatistics) {
 401     BiasedLocking::print_counters();
 402   }
 403 
 404   // Native memory tracking data
 405   if (PrintNMTStatistics) {
 406     if (MemTracker::is_on()) {
 407       BaselineTTYOutputer outputer(tty);
 408       MemTracker::print_memory_usage(outputer, K, false);
 409     } else {
 410       tty->print_cr(MemTracker::reason());
 411     }
 412   }
 413 }
 414 
 415 #endif
 416 
 417 
 418 // Helper class for registering on_exit calls through JVM_OnExit
 419 
 420 extern "C" {
 421     typedef void (*__exit_proc)(void);
 422 }
 423 
 424 class ExitProc : public CHeapObj<mtInternal> {
 425  private:
 426   __exit_proc _proc;
 427   // void (*_proc)(void);
 428   ExitProc* _next;
 429  public:
 430   // ExitProc(void (*proc)(void)) {
 431   ExitProc(__exit_proc proc) {
 432     _proc = proc;
 433     _next = NULL;
 434   }
 435   void evaluate()               { _proc(); }
 436   ExitProc* next() const        { return _next; }
 437   void set_next(ExitProc* next) { _next = next; }
 438 };
 439 
 440 
 441 // Linked list of registered on_exit procedures
 442 
 443 static ExitProc* exit_procs = NULL;
 444 
 445 
 446 extern "C" {
 447   void register_on_exit_function(void (*func)(void)) {
 448     ExitProc *entry = new ExitProc(func);
 449     // Classic vm does not throw an exception in case the allocation failed,
 450     if (entry != NULL) {
 451       entry->set_next(exit_procs);
 452       exit_procs = entry;
 453     }
 454   }
 455 }
 456 
 457 // Note: before_exit() can be executed only once, if more than one threads
 458 //       are trying to shutdown the VM at the same time, only one thread
 459 //       can run before_exit() and all other threads must wait.
 460 void before_exit(JavaThread * thread) {
 461   #define BEFORE_EXIT_NOT_RUN 0
 462   #define BEFORE_EXIT_RUNNING 1
 463   #define BEFORE_EXIT_DONE    2
 464   static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
 465 
 466   // Note: don't use a Mutex to guard the entire before_exit(), as
 467   // JVMTI post_thread_end_event and post_vm_death_event will run native code.
 468   // A CAS or OSMutex would work just fine but then we need to manipulate
 469   // thread state for Safepoint. Here we use Monitor wait() and notify_all()
 470   // for synchronization.
 471   { MutexLocker ml(BeforeExit_lock);
 472     switch (_before_exit_status) {
 473     case BEFORE_EXIT_NOT_RUN:
 474       _before_exit_status = BEFORE_EXIT_RUNNING;
 475       break;
 476     case BEFORE_EXIT_RUNNING:
 477       while (_before_exit_status == BEFORE_EXIT_RUNNING) {
 478         BeforeExit_lock->wait();
 479       }
 480       assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
 481       return;
 482     case BEFORE_EXIT_DONE:
 483       return;
 484     }
 485   }
 486 
 487   // The only difference between this and Win32's _onexit procs is that
 488   // this version is invoked before any threads get killed.
 489   ExitProc* current = exit_procs;
 490   while (current != NULL) {
 491     ExitProc* next = current->next();
 492     current->evaluate();
 493     delete current;
 494     current = next;
 495   }
 496 
 497   // Hang forever on exit if we're reporting an error.
 498   if (ShowMessageBoxOnError && is_error_reported()) {
 499     os::infinite_sleep();
 500   }
 501 
 502   // Stop any ongoing concurrent GC work
 503   Universe::heap()->stop();
 504 
 505   // Terminate watcher thread - must before disenrolling any periodic task
 506   if (PeriodicTask::num_tasks() > 0)
 507     WatcherThread::stop();
 508 
 509   // Print statistics gathered (profiling ...)
 510   if (Arguments::has_profile()) {
 511     FlatProfiler::disengage();
 512     FlatProfiler::print(10);
 513   }
 514 
 515   // shut down the StatSampler task
 516   StatSampler::disengage();
 517   StatSampler::destroy();
 518 
 519   // We do not need to explicitly stop concurrent GC threads because the
 520   // JVM will be taken down at a safepoint when such threads are inactive --
 521   // except for some concurrent G1 threads, see (comment in)
 522   // Threads::destroy_vm().
 523 
 524   // Print GC/heap related information.
 525   if (PrintGCDetails) {
 526     Universe::print();
 527     AdaptiveSizePolicyOutput(0);
 528     if (Verbose) {
 529       ClassLoaderDataGraph::dump_on(gclog_or_tty);
 530     }
 531   }
 532 
 533   if (PrintBytecodeHistogram) {
 534     BytecodeHistogram::print();
 535   }
 536 
 537   if (JvmtiExport::should_post_thread_life()) {
 538     JvmtiExport::post_thread_end(thread);
 539   }
 540 
 541 
 542   EventThreadEnd event;
 543   if (event.should_commit()) {
 544       event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
 545       event.commit();
 546   }
 547 
 548   // Always call even when there are not JVMTI environments yet, since environments
 549   // may be attached late and JVMTI must track phases of VM execution
 550   JvmtiExport::post_vm_death();
 551   Threads::shutdown_vm_agents();
 552 
 553   // Terminate the signal thread
 554   // Note: we don't wait until it actually dies.
 555   os::terminate_signal_thread();
 556 
 557   print_statistics();
 558   Universe::heap()->print_tracing_info();
 559 
 560   { MutexLocker ml(BeforeExit_lock);
 561     _before_exit_status = BEFORE_EXIT_DONE;
 562     BeforeExit_lock->notify_all();
 563   }
 564 
 565   // Shutdown NMT before exit. Otherwise,
 566   // it will run into trouble when system destroys static variables.
 567   MemTracker::shutdown(MemTracker::NMT_normal);
 568 
 569   if (VerifyStringTableAtExit) {
 570     int fail_cnt = 0;
 571     {
 572       MutexLocker ml(StringTable_lock);
 573       fail_cnt = StringTable::verify_and_compare_entries();
 574     }
 575 
 576     if (fail_cnt != 0) {
 577       tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
 578       guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
 579     }
 580   }
 581 
 582   #undef BEFORE_EXIT_NOT_RUN
 583   #undef BEFORE_EXIT_RUNNING
 584   #undef BEFORE_EXIT_DONE
 585 }
 586 
 587 void vm_exit(int code) {
 588   Thread* thread = ThreadLocalStorage::is_initialized() ?
 589     ThreadLocalStorage::get_thread_slow() : NULL;
 590   if (thread == NULL) {
 591     // we have serious problems -- just exit
 592     vm_direct_exit(code);
 593   }
 594 
 595   if (VMThread::vm_thread() != NULL) {
 596     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
 597     VM_Exit op(code);
 598     if (thread->is_Java_thread())
 599       ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
 600     VMThread::execute(&op);
 601     // should never reach here; but in case something wrong with VM Thread.
 602     vm_direct_exit(code);
 603   } else {
 604     // VM thread is gone, just exit
 605     vm_direct_exit(code);
 606   }
 607   ShouldNotReachHere();
 608 }
 609 
 610 void notify_vm_shutdown() {
 611   // For now, just a dtrace probe.
 612   HOTSPOT_VM_SHUTDOWN();
 613   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
 614 }
 615 
 616 void vm_direct_exit(int code) {
 617   notify_vm_shutdown();
 618   os::wait_for_keypress_at_exit();
 619   ::exit(code);
 620 }
 621 
 622 void vm_perform_shutdown_actions() {
 623   // Warning: do not call 'exit_globals()' here. All threads are still running.
 624   // Calling 'exit_globals()' will disable thread-local-storage and cause all
 625   // kinds of assertions to trigger in debug mode.
 626   if (is_init_completed()) {
 627     Thread* thread = ThreadLocalStorage::is_initialized() ?
 628                      ThreadLocalStorage::get_thread_slow() : NULL;
 629     if (thread != NULL && thread->is_Java_thread()) {
 630       // We are leaving the VM, set state to native (in case any OS exit
 631       // handlers call back to the VM)
 632       JavaThread* jt = (JavaThread*)thread;
 633       // Must always be walkable or have no last_Java_frame when in
 634       // thread_in_native
 635       jt->frame_anchor()->make_walkable(jt);
 636       jt->set_thread_state(_thread_in_native);
 637     }
 638   }
 639   notify_vm_shutdown();
 640 }
 641 
 642 void vm_shutdown()
 643 {
 644   vm_perform_shutdown_actions();
 645   os::wait_for_keypress_at_exit();
 646   os::shutdown();
 647 }
 648 
 649 void vm_abort(bool dump_core) {
 650   vm_perform_shutdown_actions();
 651   os::wait_for_keypress_at_exit();
 652   os::abort(dump_core);
 653   ShouldNotReachHere();
 654 }
 655 
 656 void vm_notify_during_shutdown(const char* error, const char* message) {
 657   if (error != NULL) {
 658     tty->print_cr("Error occurred during initialization of VM");
 659     tty->print("%s", error);
 660     if (message != NULL) {
 661       tty->print_cr(": %s", message);
 662     }
 663     else {
 664       tty->cr();
 665     }
 666   }
 667   if (ShowMessageBoxOnError && WizardMode) {
 668     fatal("Error occurred during initialization of VM");
 669   }
 670 }
 671 
 672 void vm_exit_during_initialization(Handle exception) {
 673   tty->print_cr("Error occurred during initialization of VM");
 674   // If there are exceptions on this thread it must be cleared
 675   // first and here. Any future calls to EXCEPTION_MARK requires
 676   // that no pending exceptions exist.
 677   Thread *THREAD = Thread::current();
 678   if (HAS_PENDING_EXCEPTION) {
 679     CLEAR_PENDING_EXCEPTION;
 680   }
 681   java_lang_Throwable::print(exception, tty);
 682   tty->cr();
 683   java_lang_Throwable::print_stack_trace(exception(), tty);
 684   tty->cr();
 685   vm_notify_during_shutdown(NULL, NULL);
 686 
 687   // Failure during initialization, we don't want to dump core
 688   vm_abort(false);
 689 }
 690 
 691 void vm_exit_during_initialization(Symbol* ex, const char* message) {
 692   ResourceMark rm;
 693   vm_notify_during_shutdown(ex->as_C_string(), message);
 694 
 695   // Failure during initialization, we don't want to dump core
 696   vm_abort(false);
 697 }
 698 
 699 void vm_exit_during_initialization(const char* error, const char* message) {
 700   vm_notify_during_shutdown(error, message);
 701 
 702   // Failure during initialization, we don't want to dump core
 703   vm_abort(false);
 704 }
 705 
 706 void vm_shutdown_during_initialization(const char* error, const char* message) {
 707   vm_notify_during_shutdown(error, message);
 708   vm_shutdown();
 709 }
 710 
 711 JDK_Version JDK_Version::_current;
 712 const char* JDK_Version::_runtime_name;
 713 const char* JDK_Version::_runtime_version;
 714 
 715 void JDK_Version::initialize() {
 716   jdk_version_info info;
 717   assert(!_current.is_valid(), "Don't initialize twice");
 718 
 719   void *lib_handle = os::native_java_library();
 720   jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
 721      os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
 722 
 723   if (func == NULL) {
 724     // JDK older than 1.6
 725     _current._partially_initialized = true;
 726   } else {
 727     (*func)(&info, sizeof(info));
 728 
 729     int major = JDK_VERSION_MAJOR(info.jdk_version);
 730     int minor = JDK_VERSION_MINOR(info.jdk_version);
 731     int micro = JDK_VERSION_MICRO(info.jdk_version);
 732     int build = JDK_VERSION_BUILD(info.jdk_version);
 733     if (major == 1 && minor > 4) {
 734       // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
 735       major = minor;
 736       minor = micro;
 737       micro = 0;
 738     }
 739     _current = JDK_Version(major, minor, micro, info.update_version,
 740                            info.special_update_version, build,
 741                            info.thread_park_blocker == 1,
 742                            info.post_vm_init_hook_enabled == 1,
 743                            info.pending_list_uses_discovered_field == 1);
 744   }
 745 }
 746 
 747 void JDK_Version::fully_initialize(
 748     uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
 749   // This is only called when current is less than 1.6 and we've gotten
 750   // far enough in the initialization to determine the exact version.
 751   assert(major < 6, "not needed for JDK version >= 6");
 752   assert(is_partially_initialized(), "must not initialize");
 753   if (major < 5) {
 754     // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
 755     micro = minor;
 756     minor = major;
 757     major = 1;
 758   }
 759   _current = JDK_Version(major, minor, micro, update);
 760 }
 761 
 762 void JDK_Version_init() {
 763   JDK_Version::initialize();
 764 }
 765 
 766 static int64_t encode_jdk_version(const JDK_Version& v) {
 767   return
 768     ((int64_t)v.major_version()          << (BitsPerByte * 5)) |
 769     ((int64_t)v.minor_version()          << (BitsPerByte * 4)) |
 770     ((int64_t)v.micro_version()          << (BitsPerByte * 3)) |
 771     ((int64_t)v.update_version()         << (BitsPerByte * 2)) |
 772     ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
 773     ((int64_t)v.build_number()           << (BitsPerByte * 0));
 774 }
 775 
 776 int JDK_Version::compare(const JDK_Version& other) const {
 777   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
 778   if (!is_partially_initialized() && other.is_partially_initialized()) {
 779     return -(other.compare(*this)); // flip the comparators
 780   }
 781   assert(!other.is_partially_initialized(), "Not initialized yet");
 782   if (is_partially_initialized()) {
 783     assert(other.major_version() >= 6,
 784            "Invalid JDK version comparison during initialization");
 785     return -1;
 786   } else {
 787     uint64_t e = encode_jdk_version(*this);
 788     uint64_t o = encode_jdk_version(other);
 789     return (e > o) ? 1 : ((e == o) ? 0 : -1);
 790   }
 791 }
 792 
 793 void JDK_Version::to_string(char* buffer, size_t buflen) const {
 794   size_t index = 0;
 795   if (!is_valid()) {
 796     jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
 797   } else if (is_partially_initialized()) {
 798     jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
 799   } else {
 800     index += jio_snprintf(
 801         &buffer[index], buflen - index, "%d.%d", _major, _minor);
 802     if (_micro > 0) {
 803       index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
 804     }
 805     if (_update > 0) {
 806       index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
 807     }
 808     if (_special > 0) {
 809       index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
 810     }
 811     if (_build > 0) {
 812       index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
 813     }
 814   }
 815 }