1 /*
   2  * Copyright (c) 1997, 2016, 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/deoptimization.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/sweeper.hpp"
  57 #include "runtime/task.hpp"
  58 #include "runtime/thread.inline.hpp"
  59 #include "runtime/timer.hpp"
  60 #include "runtime/vm_operations.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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 117 
 118 GrowableArray<Method*>* collected_profiled_methods;
 119 
 120 void collect_profiled_methods(Method* m) {
 121   Thread* thread = Thread::current();
 122   // This HandleMark prevents a huge amount of handles from being added
 123   // to the metadata_handles() array on the thread.
 124   HandleMark hm(thread);
 125   methodHandle mh(thread, m);
 126   if ((m->method_data() != NULL) &&
 127       (PrintMethodData || CompilerOracle::should_print(mh))) {
 128     collected_profiled_methods->push(m);
 129   }
 130 }
 131 
 132 
 133 int compare_methods(Method** a, Method** b) {
 134   // %%% there can be 32-bit overflow here
 135   return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
 136        - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
 137 }
 138 
 139 
 140 void print_method_invocation_histogram() {
 141   ResourceMark rm;
 142   HandleMark hm;
 143   collected_invoked_methods = new GrowableArray<Method*>(1024);
 144   SystemDictionary::methods_do(collect_invoked_methods);
 145   collected_invoked_methods->sort(&compare_methods);
 146   //
 147   tty->cr();
 148   tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
 149   tty->cr();
 150   tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
 151   unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
 152       synch_total = 0, nativ_total = 0, acces_total = 0;
 153   for (int index = 0; index < collected_invoked_methods->length(); index++) {
 154     Method* m = collected_invoked_methods->at(index);
 155     int c = m->invocation_count() + m->compiled_invocation_count();
 156     if (c >= MethodHistogramCutoff) m->print_invocation_count();
 157     int_total  += m->invocation_count();
 158     comp_total += m->compiled_invocation_count();
 159     if (m->is_final())        final_total  += c;
 160     if (m->is_static())       static_total += c;
 161     if (m->is_synchronized()) synch_total  += c;
 162     if (m->is_native())       nativ_total  += c;
 163     if (m->is_accessor())     acces_total  += c;
 164   }
 165   tty->cr();
 166   total = int_total + comp_total;
 167   tty->print_cr("Invocations summary:");
 168   tty->print_cr("\t%9d (%4.1f%%) interpreted",  int_total,    100.0 * int_total    / total);
 169   tty->print_cr("\t%9d (%4.1f%%) compiled",     comp_total,   100.0 * comp_total   / total);
 170   tty->print_cr("\t%9d (100%%)  total",         total);
 171   tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total,  100.0 * synch_total  / total);
 172   tty->print_cr("\t%9d (%4.1f%%) final",        final_total,  100.0 * final_total  / total);
 173   tty->print_cr("\t%9d (%4.1f%%) static",       static_total, 100.0 * static_total / total);
 174   tty->print_cr("\t%9d (%4.1f%%) native",       nativ_total,  100.0 * nativ_total  / total);
 175   tty->print_cr("\t%9d (%4.1f%%) accessor",     acces_total,  100.0 * acces_total  / total);
 176   tty->cr();
 177   SharedRuntime::print_call_statistics(comp_total);
 178 }
 179 
 180 void print_method_profiling_data() {
 181   ResourceMark rm;
 182   HandleMark hm;
 183   collected_profiled_methods = new GrowableArray<Method*>(1024);
 184   SystemDictionary::methods_do(collect_profiled_methods);
 185   collected_profiled_methods->sort(&compare_methods);
 186 
 187   int count = collected_profiled_methods->length();
 188   int total_size = 0;
 189   if (count > 0) {
 190     for (int index = 0; index < count; index++) {
 191       Method* m = collected_profiled_methods->at(index);
 192       ttyLocker ttyl;
 193       tty->print_cr("------------------------------------------------------------------------");
 194       //m->print_name(tty);
 195       m->print_invocation_count();
 196       tty->print_cr("  mdo size: %d bytes", m->method_data()->size_in_bytes());
 197       tty->cr();
 198       // Dump data on parameters if any
 199       if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
 200         tty->fill_to(2);
 201         m->method_data()->parameters_type_data()->print_data_on(tty);
 202       }
 203       m->print_codes();
 204       total_size += m->method_data()->size_in_bytes();
 205     }
 206     tty->print_cr("------------------------------------------------------------------------");
 207     tty->print_cr("Total MDO size: %d bytes", total_size);
 208   }
 209 }
 210 
 211 void print_bytecode_count() {
 212   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 213     tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
 214   }
 215 }
 216 
 217 AllocStats alloc_stats;
 218 
 219 
 220 
 221 // General statistics printing (profiling ...)
 222 void print_statistics() {
 223 #ifdef ASSERT
 224 
 225   if (CountRuntimeCalls) {
 226     extern Histogram *RuntimeHistogram;
 227     RuntimeHistogram->print();
 228   }
 229 
 230   if (CountJNICalls) {
 231     extern Histogram *JNIHistogram;
 232     JNIHistogram->print();
 233   }
 234 
 235   if (CountJVMCalls) {
 236     extern Histogram *JVMHistogram;
 237     JVMHistogram->print();
 238   }
 239 
 240 #endif
 241 
 242   if (MemProfiling) {
 243     MemProfiler::disengage();
 244   }
 245 
 246   if (CITime) {
 247     CompileBroker::print_times();
 248   }
 249 
 250 #ifdef COMPILER1
 251   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
 252     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
 253     Runtime1::print_statistics();
 254     Deoptimization::print_statistics();
 255     SharedRuntime::print_statistics();
 256     nmethod::print_statistics();
 257   }
 258 #endif /* COMPILER1 */
 259 
 260 #ifdef COMPILER2
 261   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
 262     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
 263     Compile::print_statistics();
 264 #ifndef COMPILER1
 265     Deoptimization::print_statistics();
 266     nmethod::print_statistics();
 267     SharedRuntime::print_statistics();
 268 #endif //COMPILER1
 269     os::print_statistics();
 270   }
 271 
 272   if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 273     OptoRuntime::print_named_counters();
 274   }
 275 
 276   if (TimeLivenessAnalysis) {
 277     MethodLiveness::print_times();
 278   }
 279 #ifdef ASSERT
 280   if (CollectIndexSetStatistics) {
 281     IndexSet::print_statistics();
 282   }
 283 #endif // ASSERT
 284 #endif // COMPILER2
 285   if (CountCompiledCalls) {
 286     print_method_invocation_histogram();
 287   }
 288   if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
 289     print_method_profiling_data();
 290   }
 291   if (TimeCompiler) {
 292     COMPILER2_PRESENT(Compile::print_timers();)
 293   }
 294   if (TimeCompilationPolicy) {
 295     CompilationPolicy::policy()->print_time();
 296   }
 297   if (TimeOopMap) {
 298     GenerateOopMap::print_time();
 299   }
 300   if (ProfilerCheckIntervals) {
 301     PeriodicTask::print_intervals();
 302   }
 303   if (PrintSymbolTableSizeHistogram) {
 304     SymbolTable::print_histogram();
 305   }
 306   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 307     BytecodeCounter::print();
 308   }
 309   if (PrintBytecodePairHistogram) {
 310     BytecodePairHistogram::print();
 311   }
 312 
 313   if (PrintCodeCache) {
 314     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 315     CodeCache::print();
 316   }
 317 
 318   if (PrintMethodFlushingStatistics) {
 319     NMethodSweeper::print();
 320   }
 321 
 322   if (PrintCodeCache2) {
 323     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 324     CodeCache::print_internals();
 325   }
 326 
 327   if (PrintClassStatistics) {
 328     SystemDictionary::print_class_statistics();
 329   }
 330   if (PrintMethodStatistics) {
 331     SystemDictionary::print_method_statistics();
 332   }
 333 
 334   if (PrintVtableStats) {
 335     klassVtable::print_statistics();
 336     klassItable::print_statistics();
 337   }
 338   if (VerifyOops && Verbose) {
 339     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
 340   }
 341 
 342   print_bytecode_count();
 343   if (PrintMallocStatistics) {
 344     tty->print("allocation stats: ");
 345     alloc_stats.print();
 346     tty->cr();
 347   }
 348 
 349   if (PrintSystemDictionaryAtExit) {
 350     SystemDictionary::print();
 351   }
 352 
 353   if (PrintBiasedLockingStatistics) {
 354     BiasedLocking::print_counters();
 355   }
 356 
 357 #ifdef ENABLE_ZAP_DEAD_LOCALS
 358 #ifdef COMPILER2
 359   if (ZapDeadCompiledLocals) {
 360     tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
 361     tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
 362   }
 363 #endif // COMPILER2
 364 #endif // ENABLE_ZAP_DEAD_LOCALS
 365   // Native memory tracking data
 366   if (PrintNMTStatistics) {
 367     MemTracker::final_report(tty);
 368   }
 369 }
 370 
 371 #else // PRODUCT MODE STATISTICS
 372 
 373 void print_statistics() {
 374 
 375   if (CITime) {
 376     CompileBroker::print_times();
 377   }
 378 
 379   if (PrintCodeCache) {
 380     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 381     CodeCache::print();
 382   }
 383 
 384   if (PrintMethodFlushingStatistics) {
 385     NMethodSweeper::print();
 386   }
 387 
 388 #ifdef COMPILER2
 389   if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 390     OptoRuntime::print_named_counters();
 391   }
 392 #endif
 393   if (PrintBiasedLockingStatistics) {
 394     BiasedLocking::print_counters();
 395   }
 396 
 397   // Native memory tracking data
 398   if (PrintNMTStatistics) {
 399     MemTracker::final_report(tty);
 400   }
 401 }
 402 
 403 #endif
 404 
 405 
 406 // Helper class for registering on_exit calls through JVM_OnExit
 407 
 408 extern "C" {
 409     typedef void (*__exit_proc)(void);
 410 }
 411 
 412 class ExitProc : public CHeapObj<mtInternal> {
 413  private:
 414   __exit_proc _proc;
 415   // void (*_proc)(void);
 416   ExitProc* _next;
 417  public:
 418   // ExitProc(void (*proc)(void)) {
 419   ExitProc(__exit_proc proc) {
 420     _proc = proc;
 421     _next = NULL;
 422   }
 423   void evaluate()               { _proc(); }
 424   ExitProc* next() const        { return _next; }
 425   void set_next(ExitProc* next) { _next = next; }
 426 };
 427 
 428 
 429 // Linked list of registered on_exit procedures
 430 
 431 static ExitProc* exit_procs = NULL;
 432 
 433 
 434 extern "C" {
 435   void register_on_exit_function(void (*func)(void)) {
 436     ExitProc *entry = new ExitProc(func);
 437     // Classic vm does not throw an exception in case the allocation failed,
 438     if (entry != NULL) {
 439       entry->set_next(exit_procs);
 440       exit_procs = entry;
 441     }
 442   }
 443 }
 444 
 445 // Note: before_exit() can be executed only once, if more than one threads
 446 //       are trying to shutdown the VM at the same time, only one thread
 447 //       can run before_exit() and all other threads must wait.
 448 void before_exit(JavaThread * thread) {
 449   #define BEFORE_EXIT_NOT_RUN 0
 450   #define BEFORE_EXIT_RUNNING 1
 451   #define BEFORE_EXIT_DONE    2
 452   static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
 453 
 454   // Note: don't use a Mutex to guard the entire before_exit(), as
 455   // JVMTI post_thread_end_event and post_vm_death_event will run native code.
 456   // A CAS or OSMutex would work just fine but then we need to manipulate
 457   // thread state for Safepoint. Here we use Monitor wait() and notify_all()
 458   // for synchronization.
 459   { MutexLocker ml(BeforeExit_lock);
 460     switch (_before_exit_status) {
 461     case BEFORE_EXIT_NOT_RUN:
 462       _before_exit_status = BEFORE_EXIT_RUNNING;
 463       break;
 464     case BEFORE_EXIT_RUNNING:
 465       while (_before_exit_status == BEFORE_EXIT_RUNNING) {
 466         BeforeExit_lock->wait();
 467       }
 468       assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
 469       return;
 470     case BEFORE_EXIT_DONE:
 471       return;
 472     }
 473   }
 474 
 475   // The only difference between this and Win32's _onexit procs is that
 476   // this version is invoked before any threads get killed.
 477   ExitProc* current = exit_procs;
 478   while (current != NULL) {
 479     ExitProc* next = current->next();
 480     current->evaluate();
 481     delete current;
 482     current = next;
 483   }
 484 
 485   // Hang forever on exit if we're reporting an error.
 486   if (ShowMessageBoxOnError && is_error_reported()) {
 487     os::infinite_sleep();
 488   }
 489 
 490   // Terminate watcher thread - must before disenrolling any periodic task
 491   if (PeriodicTask::num_tasks() > 0)
 492     WatcherThread::stop();
 493 
 494   // Print statistics gathered (profiling ...)
 495   if (Arguments::has_profile()) {
 496     FlatProfiler::disengage();
 497     FlatProfiler::print(10);
 498   }
 499 
 500   // shut down the StatSampler task
 501   StatSampler::disengage();
 502   StatSampler::destroy();
 503 
 504   // Stop concurrent GC threads
 505   Universe::heap()->stop();
 506 
 507   // Print GC/heap related information.
 508   if (PrintGCDetails) {
 509     Universe::print();
 510     AdaptiveSizePolicyOutput(0);
 511     if (Verbose) {
 512       ClassLoaderDataGraph::dump_on(gclog_or_tty);
 513     }
 514   }
 515 
 516   if (PrintBytecodeHistogram) {
 517     BytecodeHistogram::print();
 518   }
 519 
 520   if (JvmtiExport::should_post_thread_life()) {
 521     JvmtiExport::post_thread_end(thread);
 522   }
 523 
 524 
 525   EventThreadEnd event;
 526   if (event.should_commit()) {
 527       event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
 528       event.commit();
 529   }
 530 
 531   // Always call even when there are not JVMTI environments yet, since environments
 532   // may be attached late and JVMTI must track phases of VM execution
 533   JvmtiExport::post_vm_death();
 534   Threads::shutdown_vm_agents();
 535 
 536   // Terminate the signal thread
 537   // Note: we don't wait until it actually dies.
 538   os::terminate_signal_thread();
 539 
 540   print_statistics();
 541   Universe::heap()->print_tracing_info();
 542 
 543   { MutexLocker ml(BeforeExit_lock);
 544     _before_exit_status = BEFORE_EXIT_DONE;
 545     BeforeExit_lock->notify_all();
 546   }
 547 
 548   if (VerifyStringTableAtExit) {
 549     int fail_cnt = 0;
 550     {
 551       MutexLocker ml(StringTable_lock);
 552       fail_cnt = StringTable::verify_and_compare_entries();
 553     }
 554 
 555     if (fail_cnt != 0) {
 556       tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
 557       guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
 558     }
 559   }
 560 
 561   #undef BEFORE_EXIT_NOT_RUN
 562   #undef BEFORE_EXIT_RUNNING
 563   #undef BEFORE_EXIT_DONE
 564 }
 565 
 566 void vm_exit(int code) {
 567   Thread* thread = ThreadLocalStorage::is_initialized() ?
 568     ThreadLocalStorage::get_thread_slow() : NULL;
 569   if (thread == NULL) {
 570     // we have serious problems -- just exit
 571     vm_direct_exit(code);
 572   }
 573 
 574   if (VMThread::vm_thread() != NULL) {
 575     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
 576     VM_Exit op(code);
 577     if (thread->is_Java_thread())
 578       ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
 579     VMThread::execute(&op);
 580     // should never reach here; but in case something wrong with VM Thread.
 581     vm_direct_exit(code);
 582   } else {
 583     // VM thread is gone, just exit
 584     vm_direct_exit(code);
 585   }
 586   ShouldNotReachHere();
 587 }
 588 
 589 void notify_vm_shutdown() {
 590   // For now, just a dtrace probe.
 591 #ifndef USDT2
 592   HS_DTRACE_PROBE(hotspot, vm__shutdown);
 593   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
 594 #else /* USDT2 */
 595   HOTSPOT_VM_SHUTDOWN();
 596 #endif /* USDT2 */
 597 }
 598 
 599 void vm_direct_exit(int code) {
 600   notify_vm_shutdown();
 601   os::wait_for_keypress_at_exit();
 602   ::exit(code);
 603 }
 604 
 605 void vm_perform_shutdown_actions() {
 606   // Warning: do not call 'exit_globals()' here. All threads are still running.
 607   // Calling 'exit_globals()' will disable thread-local-storage and cause all
 608   // kinds of assertions to trigger in debug mode.
 609   if (is_init_completed()) {
 610     Thread* thread = ThreadLocalStorage::is_initialized() ?
 611                      ThreadLocalStorage::get_thread_slow() : NULL;
 612     if (thread != NULL && thread->is_Java_thread()) {
 613       // We are leaving the VM, set state to native (in case any OS exit
 614       // handlers call back to the VM)
 615       JavaThread* jt = (JavaThread*)thread;
 616       // Must always be walkable or have no last_Java_frame when in
 617       // thread_in_native
 618       jt->frame_anchor()->make_walkable(jt);
 619       jt->set_thread_state(_thread_in_native);
 620     }
 621   }
 622   notify_vm_shutdown();
 623 }
 624 
 625 void vm_shutdown()
 626 {
 627   vm_perform_shutdown_actions();
 628   os::wait_for_keypress_at_exit();
 629   os::shutdown();
 630 }
 631 
 632 void vm_abort(bool dump_core) {
 633   vm_perform_shutdown_actions();
 634   os::wait_for_keypress_at_exit();
 635   os::abort(dump_core);
 636   ShouldNotReachHere();
 637 }
 638 
 639 void vm_notify_during_shutdown(const char* error, const char* message) {
 640   if (error != NULL) {
 641     tty->print_cr("Error occurred during initialization of VM");
 642     tty->print("%s", error);
 643     if (message != NULL) {
 644       tty->print_cr(": %s", message);
 645     }
 646     else {
 647       tty->cr();
 648     }
 649   }
 650   if (ShowMessageBoxOnError && WizardMode) {
 651     fatal("Error occurred during initialization of VM");
 652   }
 653 }
 654 
 655 void vm_exit_during_initialization(Handle exception) {
 656   tty->print_cr("Error occurred during initialization of VM");
 657   // If there are exceptions on this thread it must be cleared
 658   // first and here. Any future calls to EXCEPTION_MARK requires
 659   // that no pending exceptions exist.
 660   Thread *THREAD = Thread::current();
 661   if (HAS_PENDING_EXCEPTION) {
 662     CLEAR_PENDING_EXCEPTION;
 663   }
 664   java_lang_Throwable::print(exception, tty);
 665   tty->cr();
 666   java_lang_Throwable::print_stack_trace(exception(), tty);
 667   tty->cr();
 668   vm_notify_during_shutdown(NULL, NULL);
 669 
 670   // Failure during initialization, we don't want to dump core
 671   vm_abort(false);
 672 }
 673 
 674 void vm_exit_during_initialization(Symbol* ex, const char* message) {
 675   ResourceMark rm;
 676   vm_notify_during_shutdown(ex->as_C_string(), message);
 677 
 678   // Failure during initialization, we don't want to dump core
 679   vm_abort(false);
 680 }
 681 
 682 void vm_exit_during_initialization(const char* error, const char* message) {
 683   vm_notify_during_shutdown(error, message);
 684 
 685   // Failure during initialization, we don't want to dump core
 686   vm_abort(false);
 687 }
 688 
 689 void vm_shutdown_during_initialization(const char* error, const char* message) {
 690   vm_notify_during_shutdown(error, message);
 691   vm_shutdown();
 692 }
 693 
 694 JDK_Version JDK_Version::_current;
 695 const char* JDK_Version::_runtime_name;
 696 const char* JDK_Version::_runtime_version;
 697 
 698 void JDK_Version::initialize() {
 699   jdk_version_info info;
 700   assert(!_current.is_valid(), "Don't initialize twice");
 701 
 702   void *lib_handle = os::native_java_library();
 703   jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
 704      os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
 705 
 706   if (func == NULL) {
 707     // JDK older than 1.6
 708     _current._partially_initialized = true;
 709   } else {
 710     (*func)(&info, sizeof(info));
 711 
 712     int major = JDK_VERSION_MAJOR(info.jdk_version);
 713     int minor = JDK_VERSION_MINOR(info.jdk_version);
 714     int micro = JDK_VERSION_MICRO(info.jdk_version);
 715     int build = JDK_VERSION_BUILD(info.jdk_version);
 716     if (major == 1 && minor > 4) {
 717       // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
 718       major = minor;
 719       minor = micro;
 720       micro = 0;
 721     }
 722     _current = JDK_Version(major, minor, micro, info.update_version,
 723                            info.special_update_version, build,
 724                            info.thread_park_blocker == 1,
 725                            info.post_vm_init_hook_enabled == 1,
 726                            info.pending_list_uses_discovered_field == 1);
 727   }
 728 }
 729 
 730 void JDK_Version::fully_initialize(
 731     uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
 732   // This is only called when current is less than 1.6 and we've gotten
 733   // far enough in the initialization to determine the exact version.
 734   assert(major < 6, "not needed for JDK version >= 6");
 735   assert(is_partially_initialized(), "must not initialize");
 736   if (major < 5) {
 737     // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
 738     micro = minor;
 739     minor = major;
 740     major = 1;
 741   }
 742   _current = JDK_Version(major, minor, micro, update);
 743 }
 744 
 745 void JDK_Version_init() {
 746   JDK_Version::initialize();
 747 }
 748 
 749 static int64_t encode_jdk_version(const JDK_Version& v) {
 750   return
 751     ((int64_t)v.major_version()          << (BitsPerByte * 5)) |
 752     ((int64_t)v.minor_version()          << (BitsPerByte * 4)) |
 753     ((int64_t)v.micro_version()          << (BitsPerByte * 3)) |
 754     ((int64_t)v.update_version()         << (BitsPerByte * 2)) |
 755     ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
 756     ((int64_t)v.build_number()           << (BitsPerByte * 0));
 757 }
 758 
 759 int JDK_Version::compare(const JDK_Version& other) const {
 760   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
 761   if (!is_partially_initialized() && other.is_partially_initialized()) {
 762     return -(other.compare(*this)); // flip the comparators
 763   }
 764   assert(!other.is_partially_initialized(), "Not initialized yet");
 765   if (is_partially_initialized()) {
 766     assert(other.major_version() >= 6,
 767            "Invalid JDK version comparison during initialization");
 768     return -1;
 769   } else {
 770     uint64_t e = encode_jdk_version(*this);
 771     uint64_t o = encode_jdk_version(other);
 772     return (e > o) ? 1 : ((e == o) ? 0 : -1);
 773   }
 774 }
 775 
 776 void JDK_Version::to_string(char* buffer, size_t buflen) const {
 777   assert(buffer && buflen > 0, "call with useful buffer");
 778   size_t index = 0;
 779   if (!is_valid()) {
 780     jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
 781   } else if (is_partially_initialized()) {
 782     jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
 783   } else {
 784     int rc = jio_snprintf(
 785         &buffer[index], buflen - index, "%d.%d", _major, _minor);
 786     if (rc == -1) return;
 787     index += rc;
 788     if (_micro > 0) {
 789       rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
 790       if (rc == -1) return;
 791       index += rc;
 792     }
 793     if (_update > 0) {
 794       rc = jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
 795       if (rc == -1) return;
 796       index += rc;
 797     }
 798     if (_special > 0) {
 799       rc = jio_snprintf(&buffer[index], buflen - index, "%c", _special);
 800       if (rc == -1) return;
 801       index += rc;
 802     }
 803     if (_build > 0) {
 804       rc = jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
 805       if (rc == -1) return;
 806       index += rc;
 807     }
 808   }
 809 }
--- EOF ---