1 /*
   2  * Copyright (c) 1997, 2019, 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/classLoaderDataGraph.hpp"
  30 #include "classfile/stringTable.hpp"
  31 #include "classfile/symbolTable.hpp"
  32 #include "classfile/systemDictionary.hpp"
  33 #include "code/codeCache.hpp"
  34 #include "compiler/compileBroker.hpp"
  35 #include "compiler/compilerOracle.hpp"
  36 #include "interpreter/bytecodeHistogram.hpp"
  37 #include "jfr/jfrEvents.hpp"
  38 #include "jfr/support/jfrThreadId.hpp"
  39 #if INCLUDE_JVMCI
  40 #include "jvmci/jvmci.hpp"
  41 #endif
  42 #include "logging/log.hpp"
  43 #include "logging/logStream.hpp"
  44 #include "memory/oopFactory.hpp"
  45 #include "memory/resourceArea.hpp"
  46 #include "memory/dynamicArchive.hpp"
  47 #include "memory/universe.hpp"
  48 #include "oops/constantPool.hpp"
  49 #include "oops/generateOopMap.hpp"
  50 #include "oops/instanceKlass.hpp"
  51 #include "oops/instanceOop.hpp"
  52 #include "oops/method.hpp"
  53 #include "oops/objArrayOop.hpp"
  54 #include "oops/oop.inline.hpp"
  55 #include "oops/symbol.hpp"
  56 #include "prims/jvmtiExport.hpp"
  57 #include "runtime/arguments.hpp"
  58 #include "runtime/biasedLocking.hpp"
  59 #include "runtime/compilationPolicy.hpp"
  60 #include "runtime/deoptimization.hpp"
  61 #include "runtime/flags/flagSetting.hpp"
  62 #include "runtime/handles.inline.hpp"
  63 #include "runtime/init.hpp"
  64 #include "runtime/interfaceSupport.inline.hpp"
  65 #include "runtime/java.hpp"
  66 #include "runtime/memprofiler.hpp"
  67 #include "runtime/sharedRuntime.hpp"
  68 #include "runtime/statSampler.hpp"
  69 #include "runtime/sweeper.hpp"
  70 #include "runtime/task.hpp"
  71 #include "runtime/thread.inline.hpp"
  72 #include "runtime/timer.hpp"
  73 #include "runtime/vmOperations.hpp"
  74 #include "services/memTracker.hpp"
  75 #include "utilities/dtrace.hpp"
  76 #include "utilities/globalDefinitions.hpp"
  77 #include "utilities/histogram.hpp"
  78 #include "utilities/macros.hpp"
  79 #include "utilities/vmError.hpp"
  80 #ifdef COMPILER1
  81 #include "c1/c1_Compiler.hpp"
  82 #include "c1/c1_Runtime1.hpp"
  83 #endif
  84 #ifdef COMPILER2
  85 #include "code/compiledIC.hpp"
  86 #include "opto/compile.hpp"
  87 #include "opto/indexSet.hpp"
  88 #include "opto/runtime.hpp"
  89 #endif
  90 #if INCLUDE_JFR
  91 #include "jfr/jfr.hpp"
  92 #endif
  93 
  94 GrowableArray<Method*>* collected_profiled_methods;
  95 
  96 int compare_methods(Method** a, Method** b) {
  97   // %%% there can be 32-bit overflow here
  98   return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
  99        - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
 100 }
 101 
 102 void collect_profiled_methods(Method* m) {
 103   Thread* thread = Thread::current();
 104   methodHandle mh(thread, m);
 105   if ((m->method_data() != NULL) &&
 106       (PrintMethodData || CompilerOracle::should_print(mh))) {
 107     collected_profiled_methods->push(m);
 108   }
 109 }
 110 
 111 void print_method_profiling_data() {
 112   if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
 113      (PrintMethodData || CompilerOracle::should_print_methods())) {
 114     ResourceMark rm;
 115     HandleMark hm;
 116     collected_profiled_methods = new GrowableArray<Method*>(1024);
 117     SystemDictionary::methods_do(collect_profiled_methods);
 118     collected_profiled_methods->sort(&compare_methods);
 119 
 120     int count = collected_profiled_methods->length();
 121     int total_size = 0;
 122     if (count > 0) {
 123       for (int index = 0; index < count; index++) {
 124         Method* m = collected_profiled_methods->at(index);
 125         ttyLocker ttyl;
 126         tty->print_cr("------------------------------------------------------------------------");
 127         m->print_invocation_count();
 128         tty->print_cr("  mdo size: %d bytes", m->method_data()->size_in_bytes());
 129         tty->cr();
 130         // Dump data on parameters if any
 131         if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
 132           tty->fill_to(2);
 133           m->method_data()->parameters_type_data()->print_data_on(tty);
 134         }
 135         m->print_codes();
 136         total_size += m->method_data()->size_in_bytes();
 137       }
 138       tty->print_cr("------------------------------------------------------------------------");
 139       tty->print_cr("Total MDO size: %d bytes", total_size);
 140     }
 141   }
 142 }
 143 
 144 
 145 #ifndef PRODUCT
 146 
 147 // Statistics printing (method invocation histogram)
 148 
 149 GrowableArray<Method*>* collected_invoked_methods;
 150 
 151 void collect_invoked_methods(Method* m) {
 152   if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
 153     collected_invoked_methods->push(m);
 154   }
 155 }
 156 
 157 
 158 
 159 
 160 void print_method_invocation_histogram() {
 161   ResourceMark rm;
 162   HandleMark hm;
 163   collected_invoked_methods = new GrowableArray<Method*>(1024);
 164   SystemDictionary::methods_do(collect_invoked_methods);
 165   collected_invoked_methods->sort(&compare_methods);
 166   //
 167   tty->cr();
 168   tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
 169   tty->cr();
 170   tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
 171   unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
 172       synch_total = 0, nativ_total = 0, acces_total = 0;
 173   for (int index = 0; index < collected_invoked_methods->length(); index++) {
 174     Method* m = collected_invoked_methods->at(index);
 175     int c = m->invocation_count() + m->compiled_invocation_count();
 176     if (c >= MethodHistogramCutoff) m->print_invocation_count();
 177     int_total  += m->invocation_count();
 178     comp_total += m->compiled_invocation_count();
 179     if (m->is_final())        final_total  += c;
 180     if (m->is_static())       static_total += c;
 181     if (m->is_synchronized()) synch_total  += c;
 182     if (m->is_native())       nativ_total  += c;
 183     if (m->is_accessor())     acces_total  += c;
 184   }
 185   tty->cr();
 186   total = int_total + comp_total;
 187   tty->print_cr("Invocations summary:");
 188   tty->print_cr("\t%9d (%4.1f%%) interpreted",  int_total,    100.0 * int_total    / total);
 189   tty->print_cr("\t%9d (%4.1f%%) compiled",     comp_total,   100.0 * comp_total   / total);
 190   tty->print_cr("\t%9d (100%%)  total",         total);
 191   tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total,  100.0 * synch_total  / total);
 192   tty->print_cr("\t%9d (%4.1f%%) final",        final_total,  100.0 * final_total  / total);
 193   tty->print_cr("\t%9d (%4.1f%%) static",       static_total, 100.0 * static_total / total);
 194   tty->print_cr("\t%9d (%4.1f%%) native",       nativ_total,  100.0 * nativ_total  / total);
 195   tty->print_cr("\t%9d (%4.1f%%) accessor",     acces_total,  100.0 * acces_total  / total);
 196   tty->cr();
 197   SharedRuntime::print_call_statistics(comp_total);
 198 }
 199 
 200 void print_bytecode_count() {
 201   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 202     tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
 203   }
 204 }
 205 
 206 AllocStats alloc_stats;
 207 
 208 
 209 
 210 // General statistics printing (profiling ...)
 211 void print_statistics() {
 212 #ifdef ASSERT
 213 
 214   if (CountRuntimeCalls) {
 215     extern Histogram *RuntimeHistogram;
 216     RuntimeHistogram->print();
 217   }
 218 
 219   if (CountJNICalls) {
 220     extern Histogram *JNIHistogram;
 221     JNIHistogram->print();
 222   }
 223 
 224   if (CountJVMCalls) {
 225     extern Histogram *JVMHistogram;
 226     JVMHistogram->print();
 227   }
 228 
 229 #endif
 230 
 231   if (MemProfiling) {
 232     MemProfiler::disengage();
 233   }
 234 
 235   if (CITime) {
 236     CompileBroker::print_times();
 237   }
 238 
 239 #ifdef COMPILER1
 240   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
 241     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
 242     Runtime1::print_statistics();
 243     Deoptimization::print_statistics();
 244     SharedRuntime::print_statistics();
 245   }
 246 #endif /* COMPILER1 */
 247 
 248 #ifdef COMPILER2
 249   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
 250     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
 251     Compile::print_statistics();
 252 #ifndef COMPILER1
 253     Deoptimization::print_statistics();
 254     SharedRuntime::print_statistics();
 255 #endif //COMPILER1
 256     os::print_statistics();
 257   }
 258 
 259   if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 260     OptoRuntime::print_named_counters();
 261   }
 262 #ifdef ASSERT
 263   if (CollectIndexSetStatistics) {
 264     IndexSet::print_statistics();
 265   }
 266 #endif // ASSERT
 267 #else // COMPILER2
 268 #if INCLUDE_JVMCI
 269 #ifndef COMPILER1
 270   if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
 271     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
 272     Deoptimization::print_statistics();
 273     SharedRuntime::print_statistics();
 274   }
 275 #endif // COMPILER1
 276 #endif // INCLUDE_JVMCI
 277 #endif // COMPILER2
 278 
 279   if (PrintAOTStatistics) {
 280     AOTLoader::print_statistics();
 281   }
 282 
 283   if (PrintNMethodStatistics) {
 284     nmethod::print_statistics();
 285   }
 286   if (CountCompiledCalls) {
 287     print_method_invocation_histogram();
 288   }
 289 
 290   print_method_profiling_data();
 291 
 292   if (TimeOopMap) {
 293     GenerateOopMap::print_time();
 294   }
 295   if (PrintSymbolTableSizeHistogram) {
 296     SymbolTable::print_histogram();
 297   }
 298   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 299     BytecodeCounter::print();
 300   }
 301   if (PrintBytecodePairHistogram) {
 302     BytecodePairHistogram::print();
 303   }
 304 
 305   if (PrintCodeCache) {
 306     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 307     CodeCache::print();
 308   }
 309 
 310   // CodeHeap State Analytics.
 311   // Does also call NMethodSweeper::print(tty)
 312   if (PrintCodeHeapAnalytics) {
 313     CompileBroker::print_heapinfo(NULL, "all", "4096"); // details
 314   } else if (PrintMethodFlushingStatistics) {
 315     NMethodSweeper::print(tty);
 316   }
 317 
 318   if (PrintCodeCache2) {
 319     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 320     CodeCache::print_internals();
 321   }
 322 
 323   if (PrintVtableStats) {
 324     klassVtable::print_statistics();
 325     klassItable::print_statistics();
 326   }
 327   if (VerifyOops && Verbose) {
 328     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
 329   }
 330 
 331   print_bytecode_count();
 332   if (PrintMallocStatistics) {
 333     tty->print("allocation stats: ");
 334     alloc_stats.print();
 335     tty->cr();
 336   }
 337 
 338   if (PrintSystemDictionaryAtExit) {
 339     ResourceMark rm;
 340     MutexLocker mcld(ClassLoaderDataGraph_lock);
 341     SystemDictionary::print();
 342     ClassLoaderDataGraph::print();
 343   }
 344 
 345   if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
 346     Method::print_touched_methods(tty);
 347   }
 348 
 349   if (PrintBiasedLockingStatistics) {
 350     BiasedLocking::print_counters();
 351   }
 352 
 353   // Native memory tracking data
 354   if (PrintNMTStatistics) {
 355     MemTracker::final_report(tty);
 356   }
 357 
 358   ThreadsSMRSupport::log_statistics();
 359 }
 360 
 361 #else // PRODUCT MODE STATISTICS
 362 
 363 void print_statistics() {
 364 
 365   if (PrintMethodData) {
 366     print_method_profiling_data();
 367   }
 368 
 369   if (CITime) {
 370     CompileBroker::print_times();
 371   }
 372 
 373   if (PrintCodeCache) {
 374     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 375     CodeCache::print();
 376   }
 377 
 378   // CodeHeap State Analytics.
 379   // Does also call NMethodSweeper::print(tty)
 380   if (PrintCodeHeapAnalytics) {
 381     CompileBroker::print_heapinfo(NULL, "all", "4096"); // details
 382   } else if (PrintMethodFlushingStatistics) {
 383     NMethodSweeper::print(tty);
 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   { MonitorLocker 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         ml.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   JVMCI::shutdown();
 444 #endif
 445 
 446   // Hang forever on exit if we're reporting an error.
 447   if (ShowMessageBoxOnError && VMError::is_error_reported()) {
 448     os::infinite_sleep();
 449   }
 450 
 451   EventThreadEnd event;
 452   if (event.should_commit()) {
 453     event.set_thread(JFR_THREAD_ID(thread));
 454     event.commit();
 455   }
 456 
 457   JFR_ONLY(Jfr::on_vm_shutdown();)
 458 
 459   // Stop the WatcherThread. We do this before disenrolling various
 460   // PeriodicTasks to reduce the likelihood of races.
 461   if (PeriodicTask::num_tasks() > 0) {
 462     WatcherThread::stop();
 463   }
 464 
 465   // shut down the StatSampler task
 466   StatSampler::disengage();
 467   StatSampler::destroy();
 468 
 469   // Stop concurrent GC threads
 470   Universe::heap()->stop();
 471 
 472   // Print GC/heap related information.
 473   Log(gc, heap, exit) log;
 474   if (log.is_info()) {
 475     ResourceMark rm;
 476     LogStream ls_info(log.info());
 477     Universe::print_on(&ls_info);
 478     if (log.is_trace()) {
 479       LogStream ls_trace(log.trace());
 480       MutexLocker mcld(ClassLoaderDataGraph_lock);
 481       ClassLoaderDataGraph::print_on(&ls_trace);
 482     }
 483   }
 484 
 485   if (PrintBytecodeHistogram) {
 486     BytecodeHistogram::print();
 487   }
 488 
 489   if (JvmtiExport::should_post_thread_life()) {
 490     JvmtiExport::post_thread_end(thread);
 491   }
 492 
 493   // Always call even when there are not JVMTI environments yet, since environments
 494   // may be attached late and JVMTI must track phases of VM execution
 495   JvmtiExport::post_vm_death();
 496   Threads::shutdown_vm_agents();
 497 
 498   // Terminate the signal thread
 499   // Note: we don't wait until it actually dies.
 500   os::terminate_signal_thread();
 501 
 502 #if INCLUDE_CDS
 503   if (DynamicDumpSharedSpaces) {
 504     DynamicArchive::dump();
 505   }
 506 #endif
 507 
 508   print_statistics();
 509   Universe::heap()->print_tracing_info();
 510 
 511   { MutexLocker ml(BeforeExit_lock);
 512     _before_exit_status = BEFORE_EXIT_DONE;
 513     BeforeExit_lock->notify_all();
 514   }
 515 
 516   if (VerifyStringTableAtExit) {
 517     size_t fail_cnt = StringTable::verify_and_compare_entries();
 518     if (fail_cnt != 0) {
 519       tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT, fail_cnt);
 520       guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
 521     }
 522   }
 523 
 524   #undef BEFORE_EXIT_NOT_RUN
 525   #undef BEFORE_EXIT_RUNNING
 526   #undef BEFORE_EXIT_DONE
 527 }
 528 
 529 void vm_exit(int code) {
 530   Thread* thread =
 531       ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL;
 532   if (thread == NULL) {
 533     // very early initialization failure -- just exit
 534     vm_direct_exit(code);
 535   }
 536 
 537   // We'd like to add an entry to the XML log to show that the VM is
 538   // terminating, but we can't safely do that here. The logic to make
 539   // XML termination logging safe is tied to the termination of the
 540   // VMThread, and it doesn't terminate on this exit path. See 8222534.
 541 
 542   if (VMThread::vm_thread() != NULL) {
 543     if (thread->is_Java_thread()) {
 544       // We must be "in_vm" for the code below to work correctly.
 545       // Historically there must have been some exit path for which
 546       // that was not the case and so we set it explicitly - even
 547       // though we no longer know what that path may be.
 548       ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
 549     }
 550 
 551     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
 552     VM_Exit op(code);
 553 
 554     // 4945125 The vm thread comes to a safepoint during exit.
 555     // GC vm_operations can get caught at the safepoint, and the
 556     // heap is unparseable if they are caught. Grab the Heap_lock
 557     // to prevent this. The GC vm_operations will not be able to
 558     // queue until after we release it, but we never do that as we
 559     // are terminating the VM process.
 560     MutexLocker ml(Heap_lock);
 561 
 562     VMThread::execute(&op);
 563     // should never reach here; but in case something wrong with VM Thread.
 564     vm_direct_exit(code);
 565   } else {
 566     // VM thread is gone, just exit
 567     vm_direct_exit(code);
 568   }
 569   ShouldNotReachHere();
 570 }
 571 
 572 void notify_vm_shutdown() {
 573   // For now, just a dtrace probe.
 574   HOTSPOT_VM_SHUTDOWN();
 575   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
 576 }
 577 
 578 void vm_direct_exit(int code) {
 579   notify_vm_shutdown();
 580   os::wait_for_keypress_at_exit();
 581   os::exit(code);
 582 }
 583 
 584 void vm_perform_shutdown_actions() {
 585   if (is_init_completed()) {
 586     Thread* thread = Thread::current_or_null();
 587     if (thread != NULL && thread->is_Java_thread()) {
 588       // We are leaving the VM, set state to native (in case any OS exit
 589       // handlers call back to the VM)
 590       JavaThread* jt = (JavaThread*)thread;
 591       // Must always be walkable or have no last_Java_frame when in
 592       // thread_in_native
 593       jt->frame_anchor()->make_walkable(jt);
 594       jt->set_thread_state(_thread_in_native);
 595     }
 596   }
 597   notify_vm_shutdown();
 598 }
 599 
 600 void vm_shutdown()
 601 {
 602   vm_perform_shutdown_actions();
 603   os::wait_for_keypress_at_exit();
 604   os::shutdown();
 605 }
 606 
 607 void vm_abort(bool dump_core) {
 608   vm_perform_shutdown_actions();
 609   os::wait_for_keypress_at_exit();
 610 
 611   // Flush stdout and stderr before abort.
 612   fflush(stdout);
 613   fflush(stderr);
 614 
 615   os::abort(dump_core);
 616   ShouldNotReachHere();
 617 }
 618 
 619 void vm_notify_during_cds_dumping(const char* error, const char* message) {
 620   if (error != NULL) {
 621     tty->print_cr("Error occurred during CDS dumping");
 622     tty->print("%s", error);
 623     if (message != NULL) {
 624       tty->print_cr(": %s", message);
 625     }
 626     else {
 627       tty->cr();
 628     }
 629   }
 630 }
 631 
 632 void vm_exit_during_cds_dumping(const char* error, const char* message) {
 633   vm_notify_during_cds_dumping(error, message);
 634 
 635   // Failure during CDS dumping, we don't want to dump core
 636   vm_abort(false);
 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() {
 656   vm_notify_during_shutdown(NULL, NULL);
 657 
 658   // Failure during initialization, we don't want to dump core
 659   vm_abort(false);
 660 }
 661 
 662 void vm_exit_during_initialization(Handle exception) {
 663   tty->print_cr("Error occurred during initialization of VM");
 664   // If there are exceptions on this thread it must be cleared
 665   // first and here. Any future calls to EXCEPTION_MARK requires
 666   // that no pending exceptions exist.
 667   Thread *THREAD = Thread::current(); // can't be NULL
 668   if (HAS_PENDING_EXCEPTION) {
 669     CLEAR_PENDING_EXCEPTION;
 670   }
 671   java_lang_Throwable::print_stack_trace(exception, tty);
 672   tty->cr();
 673   vm_notify_during_shutdown(NULL, NULL);
 674 
 675   // Failure during initialization, we don't want to dump core
 676   vm_abort(false);
 677 }
 678 
 679 void vm_exit_during_initialization(Symbol* ex, const char* message) {
 680   ResourceMark rm;
 681   vm_notify_during_shutdown(ex->as_C_string(), message);
 682 
 683   // Failure during initialization, we don't want to dump core
 684   vm_abort(false);
 685 }
 686 
 687 void vm_exit_during_initialization(const char* error, const char* message) {
 688   vm_notify_during_shutdown(error, message);
 689 
 690   // Failure during initialization, we don't want to dump core
 691   vm_abort(false);
 692 }
 693 
 694 void vm_shutdown_during_initialization(const char* error, const char* message) {
 695   vm_notify_during_shutdown(error, message);
 696   vm_shutdown();
 697 }
 698 
 699 JDK_Version JDK_Version::_current;
 700 const char* JDK_Version::_runtime_name;
 701 const char* JDK_Version::_runtime_version;
 702 
 703 void JDK_Version::initialize() {
 704   jdk_version_info info;
 705   assert(!_current.is_valid(), "Don't initialize twice");
 706 
 707   void *lib_handle = os::native_java_library();
 708   jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
 709      os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
 710 
 711   assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223");
 712 
 713   (*func)(&info, sizeof(info));
 714 
 715   int major = JDK_VERSION_MAJOR(info.jdk_version);
 716   int minor = JDK_VERSION_MINOR(info.jdk_version);
 717   int security = JDK_VERSION_SECURITY(info.jdk_version);
 718   int build = JDK_VERSION_BUILD(info.jdk_version);
 719 
 720   _current = JDK_Version(major, minor, security, info.patch_version, build);
 721 }
 722 
 723 void JDK_Version_init() {
 724   JDK_Version::initialize();
 725 }
 726 
 727 static int64_t encode_jdk_version(const JDK_Version& v) {
 728   return
 729     ((int64_t)v.major_version()          << (BitsPerByte * 4)) |
 730     ((int64_t)v.minor_version()          << (BitsPerByte * 3)) |
 731     ((int64_t)v.security_version()       << (BitsPerByte * 2)) |
 732     ((int64_t)v.patch_version()          << (BitsPerByte * 1)) |
 733     ((int64_t)v.build_number()           << (BitsPerByte * 0));
 734 }
 735 
 736 int JDK_Version::compare(const JDK_Version& other) const {
 737   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
 738   uint64_t e = encode_jdk_version(*this);
 739   uint64_t o = encode_jdk_version(other);
 740   return (e > o) ? 1 : ((e == o) ? 0 : -1);
 741 }
 742 
 743 void JDK_Version::to_string(char* buffer, size_t buflen) const {
 744   assert(buffer && buflen > 0, "call with useful buffer");
 745   size_t index = 0;
 746 
 747   if (!is_valid()) {
 748     jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
 749   } else {
 750     int rc = jio_snprintf(
 751         &buffer[index], buflen - index, "%d.%d", _major, _minor);
 752     if (rc == -1) return;
 753     index += rc;
 754     if (_security > 0) {
 755       rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
 756       if (rc == -1) return;
 757       index += rc;
 758     }
 759     if (_patch > 0) {
 760       rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch);
 761       if (rc == -1) return;
 762       index += rc;
 763     }
 764     if (_build > 0) {
 765       rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
 766       if (rc == -1) return;
 767       index += rc;
 768     }
 769   }
 770 }