rev 49285 : [mq]: 8198691.patch

   1 /*
   2  * Copyright (c) 1997, 2018, 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 "jvm.h"
  27 #include "aot/aotLoader.hpp"
  28 #include "classfile/classLoader.hpp"
  29 #include "classfile/stringTable.hpp"
  30 #include "classfile/systemDictionary.hpp"
  31 #include "code/codeCache.hpp"
  32 #include "compiler/compileBroker.hpp"
  33 #include "compiler/compilerOracle.hpp"
  34 #include "gc/shared/genCollectedHeap.hpp"
  35 #include "interpreter/bytecodeHistogram.hpp"
  36 #if INCLUDE_JVMCI
  37 #include "jvmci/jvmciCompiler.hpp"
  38 #include "jvmci/jvmciRuntime.hpp"
  39 #endif
  40 #include "logging/log.hpp"
  41 #include "logging/logStream.hpp"
  42 #include "memory/oopFactory.hpp"
  43 #include "memory/resourceArea.hpp"
  44 #include "memory/universe.hpp"
  45 #include "oops/constantPool.hpp"
  46 #include "oops/generateOopMap.hpp"
  47 #include "oops/instanceKlass.hpp"
  48 #include "oops/instanceOop.hpp"
  49 #include "oops/method.hpp"
  50 #include "oops/objArrayOop.hpp"
  51 #include "oops/oop.inline.hpp"
  52 #include "oops/symbol.hpp"
  53 #include "prims/jvmtiExport.hpp"
  54 #include "runtime/arguments.hpp"
  55 #include "runtime/biasedLocking.hpp"
  56 #include "runtime/compilationPolicy.hpp"
  57 #include "runtime/deoptimization.hpp"
  58 #include "runtime/init.hpp"
  59 #include "runtime/interfaceSupport.inline.hpp"
  60 #include "runtime/java.hpp"
  61 #include "runtime/memprofiler.hpp"
  62 #include "runtime/sharedRuntime.hpp"
  63 #include "runtime/statSampler.hpp"
  64 #include "runtime/sweeper.hpp"
  65 #include "runtime/task.hpp"
  66 #include "runtime/thread.inline.hpp"
  67 #include "runtime/timer.hpp"
  68 #include "runtime/vm_operations.hpp"
  69 #include "services/memTracker.hpp"
  70 #include "trace/traceMacros.hpp"
  71 #include "trace/tracing.hpp"
  72 #include "utilities/dtrace.hpp"
  73 #include "utilities/globalDefinitions.hpp"
  74 #include "utilities/histogram.hpp"
  75 #include "utilities/macros.hpp"
  76 #include "utilities/vmError.hpp"
  77 #if INCLUDE_ALL_GCS
  78 #include "gc/cms/concurrentMarkSweepThread.hpp"
  79 #include "gc/parallel/psScavenge.hpp"
  80 #endif // INCLUDE_ALL_GCS
  81 #ifdef COMPILER1
  82 #include "c1/c1_Compiler.hpp"
  83 #include "c1/c1_Runtime1.hpp"
  84 #endif
  85 #ifdef COMPILER2
  86 #include "code/compiledIC.hpp"
  87 #include "compiler/methodLiveness.hpp"
  88 #include "opto/compile.hpp"
  89 #include "opto/indexSet.hpp"
  90 #include "opto/runtime.hpp"
  91 #endif
  92 
  93 GrowableArray<Method*>* collected_profiled_methods;
  94 
  95 int compare_methods(Method** a, Method** b) {
  96   // %%% there can be 32-bit overflow here
  97   return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
  98        - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
  99 }
 100 
 101 void collect_profiled_methods(Method* m) {
 102   Thread* thread = Thread::current();
 103   methodHandle mh(thread, m);
 104   if ((m->method_data() != NULL) &&
 105       (PrintMethodData || CompilerOracle::should_print(mh))) {
 106     collected_profiled_methods->push(m);
 107   }
 108 }
 109 
 110 void print_method_profiling_data() {
 111   if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
 112      (PrintMethodData || CompilerOracle::should_print_methods())) {
 113     ResourceMark rm;
 114     HandleMark hm;
 115     collected_profiled_methods = new GrowableArray<Method*>(1024);
 116     SystemDictionary::methods_do(collect_profiled_methods);
 117     collected_profiled_methods->sort(&compare_methods);
 118 
 119     int count = collected_profiled_methods->length();
 120     int total_size = 0;
 121     if (count > 0) {
 122       for (int index = 0; index < count; index++) {
 123         Method* m = collected_profiled_methods->at(index);
 124         ttyLocker ttyl;
 125         tty->print_cr("------------------------------------------------------------------------");
 126         m->print_invocation_count();
 127         tty->print_cr("  mdo size: %d bytes", m->method_data()->size_in_bytes());
 128         tty->cr();
 129         // Dump data on parameters if any
 130         if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
 131           tty->fill_to(2);
 132           m->method_data()->parameters_type_data()->print_data_on(tty);
 133         }
 134         m->print_codes();
 135         total_size += m->method_data()->size_in_bytes();
 136       }
 137       tty->print_cr("------------------------------------------------------------------------");
 138       tty->print_cr("Total MDO size: %d bytes", total_size);
 139     }
 140   }
 141 }
 142 
 143 
 144 #ifndef PRODUCT
 145 
 146 // Statistics printing (method invocation histogram)
 147 
 148 GrowableArray<Method*>* collected_invoked_methods;
 149 
 150 void collect_invoked_methods(Method* m) {
 151   if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
 152     collected_invoked_methods->push(m);
 153   }
 154 }
 155 
 156 
 157 
 158 
 159 void print_method_invocation_histogram() {
 160   ResourceMark rm;
 161   HandleMark hm;
 162   collected_invoked_methods = new GrowableArray<Method*>(1024);
 163   SystemDictionary::methods_do(collect_invoked_methods);
 164   collected_invoked_methods->sort(&compare_methods);
 165   //
 166   tty->cr();
 167   tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
 168   tty->cr();
 169   tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
 170   unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
 171       synch_total = 0, nativ_total = 0, acces_total = 0;
 172   for (int index = 0; index < collected_invoked_methods->length(); index++) {
 173     Method* m = collected_invoked_methods->at(index);
 174     int c = m->invocation_count() + m->compiled_invocation_count();
 175     if (c >= MethodHistogramCutoff) m->print_invocation_count();
 176     int_total  += m->invocation_count();
 177     comp_total += m->compiled_invocation_count();
 178     if (m->is_final())        final_total  += c;
 179     if (m->is_static())       static_total += c;
 180     if (m->is_synchronized()) synch_total  += c;
 181     if (m->is_native())       nativ_total  += c;
 182     if (m->is_accessor())     acces_total  += c;
 183   }
 184   tty->cr();
 185   total = int_total + comp_total;
 186   tty->print_cr("Invocations summary:");
 187   tty->print_cr("\t%9d (%4.1f%%) interpreted",  int_total,    100.0 * int_total    / total);
 188   tty->print_cr("\t%9d (%4.1f%%) compiled",     comp_total,   100.0 * comp_total   / total);
 189   tty->print_cr("\t%9d (100%%)  total",         total);
 190   tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total,  100.0 * synch_total  / total);
 191   tty->print_cr("\t%9d (%4.1f%%) final",        final_total,  100.0 * final_total  / total);
 192   tty->print_cr("\t%9d (%4.1f%%) static",       static_total, 100.0 * static_total / total);
 193   tty->print_cr("\t%9d (%4.1f%%) native",       nativ_total,  100.0 * nativ_total  / total);
 194   tty->print_cr("\t%9d (%4.1f%%) accessor",     acces_total,  100.0 * acces_total  / total);
 195   tty->cr();
 196   SharedRuntime::print_call_statistics(comp_total);
 197 }
 198 
 199 void print_bytecode_count() {
 200   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 201     tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
 202   }
 203 }
 204 
 205 AllocStats alloc_stats;
 206 
 207 
 208 
 209 // General statistics printing (profiling ...)
 210 void print_statistics() {
 211 #ifdef ASSERT
 212 
 213   if (CountRuntimeCalls) {
 214     extern Histogram *RuntimeHistogram;
 215     RuntimeHistogram->print();
 216   }
 217 
 218   if (CountJNICalls) {
 219     extern Histogram *JNIHistogram;
 220     JNIHistogram->print();
 221   }
 222 
 223   if (CountJVMCalls) {
 224     extern Histogram *JVMHistogram;
 225     JVMHistogram->print();
 226   }
 227 
 228 #endif
 229 
 230   if (MemProfiling) {
 231     MemProfiler::disengage();
 232   }
 233 
 234   if (CITime) {
 235     CompileBroker::print_times();
 236   }
 237 
 238 #ifdef COMPILER1
 239   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
 240     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
 241     Runtime1::print_statistics();
 242     Deoptimization::print_statistics();
 243     SharedRuntime::print_statistics();
 244   }
 245 #endif /* COMPILER1 */
 246 
 247 #ifdef COMPILER2
 248   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
 249     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
 250     Compile::print_statistics();
 251 #ifndef COMPILER1
 252     Deoptimization::print_statistics();
 253     SharedRuntime::print_statistics();
 254 #endif //COMPILER1
 255     os::print_statistics();
 256   }
 257 
 258   if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 259     OptoRuntime::print_named_counters();
 260   }
 261 
 262   if (TimeLivenessAnalysis) {
 263     MethodLiveness::print_times();
 264   }
 265 #ifdef ASSERT
 266   if (CollectIndexSetStatistics) {
 267     IndexSet::print_statistics();
 268   }
 269 #endif // ASSERT
 270 #else
 271 #ifdef INCLUDE_JVMCI
 272 #ifndef COMPILER1
 273   if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
 274     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
 275     Deoptimization::print_statistics();
 276     SharedRuntime::print_statistics();
 277   }
 278 #endif
 279 #endif
 280 #endif
 281 
 282   if (PrintAOTStatistics) {
 283     AOTLoader::print_statistics();
 284   }
 285 
 286   if (PrintNMethodStatistics) {
 287     nmethod::print_statistics();
 288   }
 289   if (CountCompiledCalls) {
 290     print_method_invocation_histogram();
 291   }
 292 
 293   print_method_profiling_data();
 294 
 295   if (TimeCompilationPolicy) {
 296     CompilationPolicy::policy()->print_time();
 297   }
 298   if (TimeOopMap) {
 299     GenerateOopMap::print_time();
 300   }
 301   if (ProfilerCheckIntervals) {
 302     PeriodicTask::print_intervals();
 303   }
 304   if (PrintSymbolTableSizeHistogram) {
 305     SymbolTable::print_histogram();
 306   }
 307   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 308     BytecodeCounter::print();
 309   }
 310   if (PrintBytecodePairHistogram) {
 311     BytecodePairHistogram::print();
 312   }
 313 
 314   if (PrintCodeCache) {
 315     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 316     CodeCache::print();
 317   }
 318 
 319   if (PrintMethodFlushingStatistics) {
 320     NMethodSweeper::print();






 321   }
 322 
 323   if (PrintCodeCache2) {
 324     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 325     CodeCache::print_internals();
 326   }
 327 
 328   if (PrintVtableStats) {
 329     klassVtable::print_statistics();
 330     klassItable::print_statistics();
 331   }
 332   if (VerifyOops) {
 333     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
 334   }
 335 
 336   print_bytecode_count();
 337   if (PrintMallocStatistics) {
 338     tty->print("allocation stats: ");
 339     alloc_stats.print();
 340     tty->cr();
 341   }
 342 
 343   if (PrintSystemDictionaryAtExit) {
 344     ResourceMark rm;
 345     SystemDictionary::print();
 346     ClassLoaderDataGraph::print();
 347   }
 348 
 349   if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
 350     Method::print_touched_methods(tty);
 351   }
 352 
 353   if (PrintBiasedLockingStatistics) {
 354     BiasedLocking::print_counters();
 355   }
 356 
 357   // Native memory tracking data
 358   if (PrintNMTStatistics) {
 359     MemTracker::final_report(tty);
 360   }
 361 
 362   ThreadsSMRSupport::log_statistics();
 363 }
 364 
 365 #else // PRODUCT MODE STATISTICS
 366 
 367 void print_statistics() {
 368 
 369   if (PrintMethodData) {
 370     print_method_profiling_data();
 371   }
 372 
 373   if (CITime) {
 374     CompileBroker::print_times();
 375   }
 376 
 377   if (PrintCodeCache) {
 378     MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 379     CodeCache::print();
 380   }
 381 
 382   if (PrintMethodFlushingStatistics) {
 383     NMethodSweeper::print();






 384   }
 385 
 386 #ifdef COMPILER2
 387   if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 388     OptoRuntime::print_named_counters();
 389   }
 390 #endif
 391   if (PrintBiasedLockingStatistics) {
 392     BiasedLocking::print_counters();
 393   }
 394 
 395   // Native memory tracking data
 396   if (PrintNMTStatistics) {
 397     MemTracker::final_report(tty);
 398   }
 399 
 400   if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
 401     Method::print_touched_methods(tty);
 402   }
 403 
 404   ThreadsSMRSupport::log_statistics();
 405 }
 406 
 407 #endif
 408 
 409 // Note: before_exit() can be executed only once, if more than one threads
 410 //       are trying to shutdown the VM at the same time, only one thread
 411 //       can run before_exit() and all other threads must wait.
 412 void before_exit(JavaThread* thread) {
 413   #define BEFORE_EXIT_NOT_RUN 0
 414   #define BEFORE_EXIT_RUNNING 1
 415   #define BEFORE_EXIT_DONE    2
 416   static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
 417 
 418   // Note: don't use a Mutex to guard the entire before_exit(), as
 419   // JVMTI post_thread_end_event and post_vm_death_event will run native code.
 420   // A CAS or OSMutex would work just fine but then we need to manipulate
 421   // thread state for Safepoint. Here we use Monitor wait() and notify_all()
 422   // for synchronization.
 423   { MutexLocker ml(BeforeExit_lock);
 424     switch (_before_exit_status) {
 425     case BEFORE_EXIT_NOT_RUN:
 426       _before_exit_status = BEFORE_EXIT_RUNNING;
 427       break;
 428     case BEFORE_EXIT_RUNNING:
 429       while (_before_exit_status == BEFORE_EXIT_RUNNING) {
 430         BeforeExit_lock->wait();
 431       }
 432       assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
 433       return;
 434     case BEFORE_EXIT_DONE:
 435       // need block to avoid SS compiler bug
 436       {
 437         return;
 438       }
 439     }
 440   }
 441 
 442 #if INCLUDE_JVMCI
 443   // We are not using CATCH here because we want the exit to continue normally.
 444   Thread* THREAD = thread;
 445   JVMCIRuntime::shutdown(THREAD);
 446   if (HAS_PENDING_EXCEPTION) {
 447     HandleMark hm(THREAD);
 448     Handle exception(THREAD, PENDING_EXCEPTION);
 449     CLEAR_PENDING_EXCEPTION;
 450     java_lang_Throwable::java_printStackTrace(exception, THREAD);
 451   }
 452 #endif
 453 
 454   // Hang forever on exit if we're reporting an error.
 455   if (ShowMessageBoxOnError && VMError::is_error_reported()) {
 456     os::infinite_sleep();
 457   }
 458 
 459   EventThreadEnd event;
 460   if (event.should_commit()) {
 461     event.set_thread(THREAD_TRACE_ID(thread));
 462     event.commit();
 463   }
 464 
 465   TRACE_VM_EXIT();
 466 
 467   // Stop the WatcherThread. We do this before disenrolling various
 468   // PeriodicTasks to reduce the likelihood of races.
 469   if (PeriodicTask::num_tasks() > 0) {
 470     WatcherThread::stop();
 471   }
 472 
 473   // shut down the StatSampler task
 474   StatSampler::disengage();
 475   StatSampler::destroy();
 476 
 477   // Stop concurrent GC threads
 478   Universe::heap()->stop();
 479 
 480   // Print GC/heap related information.
 481   Log(gc, heap, exit) log;
 482   if (log.is_info()) {
 483     ResourceMark rm;
 484     LogStream ls_info(log.info());
 485     Universe::print_on(&ls_info);
 486     if (log.is_trace()) {
 487       LogStream ls_trace(log.trace());
 488       ClassLoaderDataGraph::print_on(&ls_trace);
 489     }
 490   }
 491 
 492   if (PrintBytecodeHistogram) {
 493     BytecodeHistogram::print();
 494   }
 495 
 496   if (JvmtiExport::should_post_thread_life()) {
 497     JvmtiExport::post_thread_end(thread);
 498   }
 499 
 500   // Always call even when there are not JVMTI environments yet, since environments
 501   // may be attached late and JVMTI must track phases of VM execution
 502   JvmtiExport::post_vm_death();
 503   Threads::shutdown_vm_agents();
 504 
 505   // Terminate the signal thread
 506   // Note: we don't wait until it actually dies.
 507   os::terminate_signal_thread();
 508 
 509   print_statistics();
 510   Universe::heap()->print_tracing_info();
 511 
 512   { MutexLocker ml(BeforeExit_lock);
 513     _before_exit_status = BEFORE_EXIT_DONE;
 514     BeforeExit_lock->notify_all();
 515   }
 516 
 517   if (VerifyStringTableAtExit) {
 518     int fail_cnt = 0;
 519     {
 520       MutexLocker ml(StringTable_lock);
 521       fail_cnt = StringTable::verify_and_compare_entries();
 522     }
 523 
 524     if (fail_cnt != 0) {
 525       tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
 526       guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
 527     }
 528   }
 529 
 530   #undef BEFORE_EXIT_NOT_RUN
 531   #undef BEFORE_EXIT_RUNNING
 532   #undef BEFORE_EXIT_DONE
 533 }
 534 
 535 void vm_exit(int code) {
 536   Thread* thread =
 537       ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL;
 538   if (thread == NULL) {
 539     // very early initialization failure -- just exit
 540     vm_direct_exit(code);
 541   }
 542 
 543   if (VMThread::vm_thread() != NULL) {
 544     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
 545     VM_Exit op(code);
 546     if (thread->is_Java_thread())
 547       ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
 548     VMThread::execute(&op);
 549     // should never reach here; but in case something wrong with VM Thread.
 550     vm_direct_exit(code);
 551   } else {
 552     // VM thread is gone, just exit
 553     vm_direct_exit(code);
 554   }
 555   ShouldNotReachHere();
 556 }
 557 
 558 void notify_vm_shutdown() {
 559   // For now, just a dtrace probe.
 560   HOTSPOT_VM_SHUTDOWN();
 561   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
 562 }
 563 
 564 void vm_direct_exit(int code) {
 565   notify_vm_shutdown();
 566   os::wait_for_keypress_at_exit();
 567   os::exit(code);
 568 }
 569 
 570 void vm_perform_shutdown_actions() {
 571   // Warning: do not call 'exit_globals()' here. All threads are still running.
 572   // Calling 'exit_globals()' will disable thread-local-storage and cause all
 573   // kinds of assertions to trigger in debug mode.
 574   if (is_init_completed()) {
 575     Thread* thread = Thread::current_or_null();
 576     if (thread != NULL && thread->is_Java_thread()) {
 577       // We are leaving the VM, set state to native (in case any OS exit
 578       // handlers call back to the VM)
 579       JavaThread* jt = (JavaThread*)thread;
 580       // Must always be walkable or have no last_Java_frame when in
 581       // thread_in_native
 582       jt->frame_anchor()->make_walkable(jt);
 583       jt->set_thread_state(_thread_in_native);
 584     }
 585   }
 586   notify_vm_shutdown();
 587 }
 588 
 589 void vm_shutdown()
 590 {
 591   vm_perform_shutdown_actions();
 592   os::wait_for_keypress_at_exit();
 593   os::shutdown();
 594 }
 595 
 596 void vm_abort(bool dump_core) {
 597   vm_perform_shutdown_actions();
 598   os::wait_for_keypress_at_exit();
 599 
 600   // Flush stdout and stderr before abort.
 601   fflush(stdout);
 602   fflush(stderr);
 603 
 604   os::abort(dump_core);
 605   ShouldNotReachHere();
 606 }
 607 
 608 void vm_notify_during_shutdown(const char* error, const char* message) {
 609   if (error != NULL) {
 610     tty->print_cr("Error occurred during initialization of VM");
 611     tty->print("%s", error);
 612     if (message != NULL) {
 613       tty->print_cr(": %s", message);
 614     }
 615     else {
 616       tty->cr();
 617     }
 618   }
 619   if (ShowMessageBoxOnError && WizardMode) {
 620     fatal("Error occurred during initialization of VM");
 621   }
 622 }
 623 
 624 void vm_exit_during_initialization() {
 625   vm_notify_during_shutdown(NULL, NULL);
 626 
 627   // Failure during initialization, we don't want to dump core
 628   vm_abort(false);
 629 }
 630 
 631 void vm_exit_during_initialization(Handle exception) {
 632   tty->print_cr("Error occurred during initialization of VM");
 633   // If there are exceptions on this thread it must be cleared
 634   // first and here. Any future calls to EXCEPTION_MARK requires
 635   // that no pending exceptions exist.
 636   Thread *THREAD = Thread::current(); // can't be NULL
 637   if (HAS_PENDING_EXCEPTION) {
 638     CLEAR_PENDING_EXCEPTION;
 639   }
 640   java_lang_Throwable::print_stack_trace(exception, tty);
 641   tty->cr();
 642   vm_notify_during_shutdown(NULL, NULL);
 643 
 644   // Failure during initialization, we don't want to dump core
 645   vm_abort(false);
 646 }
 647 
 648 void vm_exit_during_initialization(Symbol* ex, const char* message) {
 649   ResourceMark rm;
 650   vm_notify_during_shutdown(ex->as_C_string(), message);
 651 
 652   // Failure during initialization, we don't want to dump core
 653   vm_abort(false);
 654 }
 655 
 656 void vm_exit_during_initialization(const char* error, const char* message) {
 657   vm_notify_during_shutdown(error, message);
 658 
 659   // Failure during initialization, we don't want to dump core
 660   vm_abort(false);
 661 }
 662 
 663 void vm_shutdown_during_initialization(const char* error, const char* message) {
 664   vm_notify_during_shutdown(error, message);
 665   vm_shutdown();
 666 }
 667 
 668 JDK_Version JDK_Version::_current;
 669 const char* JDK_Version::_runtime_name;
 670 const char* JDK_Version::_runtime_version;
 671 
 672 void JDK_Version::initialize() {
 673   jdk_version_info info;
 674   assert(!_current.is_valid(), "Don't initialize twice");
 675 
 676   void *lib_handle = os::native_java_library();
 677   jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
 678      os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
 679 
 680   assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223");
 681 
 682   (*func)(&info, sizeof(info));
 683 
 684   int major = JDK_VERSION_MAJOR(info.jdk_version);
 685   int minor = JDK_VERSION_MINOR(info.jdk_version);
 686   int security = JDK_VERSION_SECURITY(info.jdk_version);
 687   int build = JDK_VERSION_BUILD(info.jdk_version);
 688 
 689   // Incompatible with pre-4243978 JDK.
 690   if (info.pending_list_uses_discovered_field == 0) {
 691     vm_exit_during_initialization(
 692       "Incompatible JDK is not using Reference.discovered field for pending list");
 693   }
 694   _current = JDK_Version(major, minor, security, info.patch_version, build,
 695                          info.thread_park_blocker == 1,
 696                          info.post_vm_init_hook_enabled == 1);
 697 }
 698 
 699 void JDK_Version_init() {
 700   JDK_Version::initialize();
 701 }
 702 
 703 static int64_t encode_jdk_version(const JDK_Version& v) {
 704   return
 705     ((int64_t)v.major_version()          << (BitsPerByte * 4)) |
 706     ((int64_t)v.minor_version()          << (BitsPerByte * 3)) |
 707     ((int64_t)v.security_version()       << (BitsPerByte * 2)) |
 708     ((int64_t)v.patch_version()          << (BitsPerByte * 1)) |
 709     ((int64_t)v.build_number()           << (BitsPerByte * 0));
 710 }
 711 
 712 int JDK_Version::compare(const JDK_Version& other) const {
 713   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
 714   uint64_t e = encode_jdk_version(*this);
 715   uint64_t o = encode_jdk_version(other);
 716   return (e > o) ? 1 : ((e == o) ? 0 : -1);
 717 }
 718 
 719 void JDK_Version::to_string(char* buffer, size_t buflen) const {
 720   assert(buffer && buflen > 0, "call with useful buffer");
 721   size_t index = 0;
 722 
 723   if (!is_valid()) {
 724     jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
 725   } else {
 726     int rc = jio_snprintf(
 727         &buffer[index], buflen - index, "%d.%d", _major, _minor);
 728     if (rc == -1) return;
 729     index += rc;
 730     if (_security > 0) {
 731       rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
 732       if (rc == -1) return;
 733       index += rc;
 734     }
 735     if (_patch > 0) {
 736       rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch);
 737       if (rc == -1) return;
 738       index += rc;
 739     }
 740     if (_build > 0) {
 741       rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
 742       if (rc == -1) return;
 743       index += rc;
 744     }
 745   }
 746 }
--- EOF ---