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/deoptimization.hpp"
  60 #include "runtime/flags/flagSetting.hpp"
  61 #include "runtime/handles.inline.hpp"
  62 #include "runtime/init.hpp"
  63 #include "runtime/interfaceSupport.inline.hpp"
  64 #include "runtime/java.hpp"
  65 #include "runtime/memprofiler.hpp"
  66 #include "runtime/sharedRuntime.hpp"
  67 #include "runtime/statSampler.hpp"
  68 #include "runtime/sweeper.hpp"
  69 #include "runtime/task.hpp"
  70 #include "runtime/thread.inline.hpp"
  71 #include "runtime/timer.hpp"
  72 #include "runtime/vmOperations.hpp"
  73 #include "services/memTracker.hpp"
  74 #include "utilities/dtrace.hpp"
  75 #include "utilities/globalDefinitions.hpp"
  76 #include "utilities/histogram.hpp"
  77 #include "utilities/macros.hpp"
  78 #include "utilities/vmError.hpp"
  79 #ifdef COMPILER1
  80 #include "c1/c1_Compiler.hpp"
  81 #include "c1/c1_Runtime1.hpp"
  82 #endif
  83 #ifdef COMPILER2
  84 #include "code/compiledIC.hpp"
  85 #include "opto/compile.hpp"
  86 #include "opto/indexSet.hpp"
  87 #include "opto/runtime.hpp"
  88 #endif
  89 #if INCLUDE_JFR
  90 #include "jfr/jfr.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 
 206 // General statistics printing (profiling ...)
 207 void print_statistics() {
 208 #ifdef ASSERT
 209 
 210   if (CountRuntimeCalls) {
 211     extern Histogram *RuntimeHistogram;
 212     RuntimeHistogram->print();
 213   }
 214 
 215   if (CountJNICalls) {
 216     extern Histogram *JNIHistogram;
 217     JNIHistogram->print();
 218   }
 219 
 220   if (CountJVMCalls) {
 221     extern Histogram *JVMHistogram;
 222     JVMHistogram->print();
 223   }
 224 
 225 #endif
 226 
 227   if (MemProfiling) {
 228     MemProfiler::disengage();
 229   }
 230 
 231   if (CITime) {
 232     CompileBroker::print_times();
 233   }
 234 
 235 #ifdef COMPILER1
 236   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
 237     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
 238     Runtime1::print_statistics();
 239     Deoptimization::print_statistics();
 240     SharedRuntime::print_statistics();
 241   }
 242 #endif /* COMPILER1 */
 243 
 244 #ifdef COMPILER2
 245   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
 246     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
 247     Compile::print_statistics();
 248 #ifndef COMPILER1
 249     Deoptimization::print_statistics();
 250     SharedRuntime::print_statistics();
 251 #endif //COMPILER1
 252     os::print_statistics();
 253   }
 254 
 255   if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 256     OptoRuntime::print_named_counters();
 257   }
 258 #ifdef ASSERT
 259   if (CollectIndexSetStatistics) {
 260     IndexSet::print_statistics();
 261   }
 262 #endif // ASSERT
 263 #else // COMPILER2
 264 #if INCLUDE_JVMCI
 265 #ifndef COMPILER1
 266   if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
 267     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
 268     Deoptimization::print_statistics();
 269     SharedRuntime::print_statistics();
 270   }
 271 #endif // COMPILER1
 272 #endif // INCLUDE_JVMCI
 273 #endif // COMPILER2
 274 
 275   if (PrintAOTStatistics) {
 276     AOTLoader::print_statistics();
 277   }
 278 
 279   if (PrintNMethodStatistics) {
 280     nmethod::print_statistics();
 281   }
 282   if (CountCompiledCalls) {
 283     print_method_invocation_histogram();
 284   }
 285 
 286   print_method_profiling_data();
 287 
 288   if (TimeOopMap) {
 289     GenerateOopMap::print_time();
 290   }
 291   if (PrintSymbolTableSizeHistogram) {
 292     SymbolTable::print_histogram();
 293   }
 294   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
 295     BytecodeCounter::print();
 296   }
 297   if (PrintBytecodePairHistogram) {
 298     BytecodePairHistogram::print();
 299   }
 300 
 301   if (PrintCodeCache) {
 302     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 303     CodeCache::print();
 304   }
 305 
 306   // CodeHeap State Analytics.
 307   // Does also call NMethodSweeper::print(tty)
 308   if (PrintCodeHeapAnalytics) {
 309     CompileBroker::print_heapinfo(NULL, "all", 4096); // details
 310   } else if (PrintMethodFlushingStatistics) {
 311     NMethodSweeper::print(tty);
 312   }
 313 
 314   if (PrintCodeCache2) {
 315     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 316     CodeCache::print_internals();
 317   }
 318 
 319   if (PrintVtableStats) {
 320     klassVtable::print_statistics();
 321     klassItable::print_statistics();
 322   }
 323   if (VerifyOops && Verbose) {
 324     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
 325   }
 326 
 327   print_bytecode_count();
 328 
 329   if (PrintSystemDictionaryAtExit) {
 330     ResourceMark rm;
 331     MutexLocker mcld(ClassLoaderDataGraph_lock);
 332     SystemDictionary::print();
 333     ClassLoaderDataGraph::print();
 334   }
 335 
 336   if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
 337     Method::print_touched_methods(tty);
 338   }
 339 
 340   if (PrintBiasedLockingStatistics) {
 341     BiasedLocking::print_counters();
 342   }
 343 
 344   // Native memory tracking data
 345   if (PrintNMTStatistics) {
 346     MemTracker::final_report(tty);
 347   }
 348 
 349   ThreadsSMRSupport::log_statistics();
 350 }
 351 
 352 #else // PRODUCT MODE STATISTICS
 353 
 354 void print_statistics() {
 355 
 356   if (PrintMethodData) {
 357     print_method_profiling_data();
 358   }
 359 
 360   if (CITime) {
 361     CompileBroker::print_times();
 362   }
 363 
 364   if (PrintCodeCache) {
 365     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
 366     CodeCache::print();
 367   }
 368 
 369   // CodeHeap State Analytics.
 370   // Does also call NMethodSweeper::print(tty)
 371   if (PrintCodeHeapAnalytics) {
 372     CompileBroker::print_heapinfo(NULL, "all", 4096); // details
 373   } else if (PrintMethodFlushingStatistics) {
 374     NMethodSweeper::print(tty);
 375   }
 376 
 377 #ifdef COMPILER2
 378   if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
 379     OptoRuntime::print_named_counters();
 380   }
 381 #endif
 382   if (PrintBiasedLockingStatistics) {
 383     BiasedLocking::print_counters();
 384   }
 385 
 386   // Native memory tracking data
 387   if (PrintNMTStatistics) {
 388     MemTracker::final_report(tty);
 389   }
 390 
 391   if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
 392     Method::print_touched_methods(tty);
 393   }
 394 
 395   ThreadsSMRSupport::log_statistics();
 396 }
 397 
 398 #endif
 399 
 400 // Note: before_exit() can be executed only once, if more than one threads
 401 //       are trying to shutdown the VM at the same time, only one thread
 402 //       can run before_exit() and all other threads must wait.
 403 void before_exit(JavaThread* thread) {
 404   #define BEFORE_EXIT_NOT_RUN 0
 405   #define BEFORE_EXIT_RUNNING 1
 406   #define BEFORE_EXIT_DONE    2
 407   static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
 408 
 409   // Note: don't use a Mutex to guard the entire before_exit(), as
 410   // JVMTI post_thread_end_event and post_vm_death_event will run native code.
 411   // A CAS or OSMutex would work just fine but then we need to manipulate
 412   // thread state for Safepoint. Here we use Monitor wait() and notify_all()
 413   // for synchronization.
 414   { MonitorLocker ml(BeforeExit_lock);
 415     switch (_before_exit_status) {
 416     case BEFORE_EXIT_NOT_RUN:
 417       _before_exit_status = BEFORE_EXIT_RUNNING;
 418       break;
 419     case BEFORE_EXIT_RUNNING:
 420       while (_before_exit_status == BEFORE_EXIT_RUNNING) {
 421         ml.wait();
 422       }
 423       assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
 424       return;
 425     case BEFORE_EXIT_DONE:
 426       // need block to avoid SS compiler bug
 427       {
 428         return;
 429       }
 430     }
 431   }
 432 
 433 #if INCLUDE_JVMCI
 434   JVMCI::shutdown();
 435 #endif
 436 
 437   // Hang forever on exit if we're reporting an error.
 438   if (ShowMessageBoxOnError && VMError::is_error_reported()) {
 439     os::infinite_sleep();
 440   }
 441 
 442   EventThreadEnd event;
 443   if (event.should_commit()) {
 444     event.set_thread(JFR_THREAD_ID(thread));
 445     event.commit();
 446   }
 447 
 448   JFR_ONLY(Jfr::on_vm_shutdown();)
 449 
 450   // Stop the WatcherThread. We do this before disenrolling various
 451   // PeriodicTasks to reduce the likelihood of races.
 452   if (PeriodicTask::num_tasks() > 0) {
 453     WatcherThread::stop();
 454   }
 455 
 456   // shut down the StatSampler task
 457   StatSampler::disengage();
 458   StatSampler::destroy();
 459 
 460   // Stop concurrent GC threads
 461   Universe::heap()->stop();
 462 
 463   // Print GC/heap related information.
 464   Log(gc, heap, exit) log;
 465   if (log.is_info()) {
 466     ResourceMark rm;
 467     LogStream ls_info(log.info());
 468     Universe::print_on(&ls_info);
 469     if (log.is_trace()) {
 470       LogStream ls_trace(log.trace());
 471       MutexLocker mcld(ClassLoaderDataGraph_lock);
 472       ClassLoaderDataGraph::print_on(&ls_trace);
 473     }
 474   }
 475 
 476   if (PrintBytecodeHistogram) {
 477     BytecodeHistogram::print();
 478   }
 479 
 480   if (JvmtiExport::should_post_thread_life()) {
 481     JvmtiExport::post_thread_end(thread);
 482   }
 483 
 484   // Always call even when there are not JVMTI environments yet, since environments
 485   // may be attached late and JVMTI must track phases of VM execution
 486   JvmtiExport::post_vm_death();
 487   Threads::shutdown_vm_agents();
 488 
 489   // Terminate the signal thread
 490   // Note: we don't wait until it actually dies.
 491   os::terminate_signal_thread();
 492 
 493 #if INCLUDE_CDS
 494   if (DynamicDumpSharedSpaces) {
 495     DynamicArchive::dump();
 496   }
 497 #endif
 498 
 499   print_statistics();
 500   Universe::heap()->print_tracing_info();
 501 
 502   { MutexLocker ml(BeforeExit_lock);
 503     _before_exit_status = BEFORE_EXIT_DONE;
 504     BeforeExit_lock->notify_all();
 505   }
 506 
 507   if (VerifyStringTableAtExit) {
 508     size_t fail_cnt = StringTable::verify_and_compare_entries();
 509     if (fail_cnt != 0) {
 510       tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT, fail_cnt);
 511       guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
 512     }
 513   }
 514 
 515   #undef BEFORE_EXIT_NOT_RUN
 516   #undef BEFORE_EXIT_RUNNING
 517   #undef BEFORE_EXIT_DONE
 518 }
 519 
 520 void vm_exit(int code) {
 521   Thread* thread =
 522       ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL;
 523   if (thread == NULL) {
 524     // very early initialization failure -- just exit
 525     vm_direct_exit(code);
 526   }
 527 
 528   // We'd like to add an entry to the XML log to show that the VM is
 529   // terminating, but we can't safely do that here. The logic to make
 530   // XML termination logging safe is tied to the termination of the
 531   // VMThread, and it doesn't terminate on this exit path. See 8222534.
 532 
 533   if (VMThread::vm_thread() != NULL) {
 534     if (thread->is_Java_thread()) {
 535       // We must be "in_vm" for the code below to work correctly.
 536       // Historically there must have been some exit path for which
 537       // that was not the case and so we set it explicitly - even
 538       // though we no longer know what that path may be.
 539       ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
 540     }
 541 
 542     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
 543     VM_Exit op(code);
 544 
 545     // 4945125 The vm thread comes to a safepoint during exit.
 546     // GC vm_operations can get caught at the safepoint, and the
 547     // heap is unparseable if they are caught. Grab the Heap_lock
 548     // to prevent this. The GC vm_operations will not be able to
 549     // queue until after we release it, but we never do that as we
 550     // are terminating the VM process.
 551     MutexLocker ml(Heap_lock);
 552 
 553     VMThread::execute(&op);
 554     // should never reach here; but in case something wrong with VM Thread.
 555     vm_direct_exit(code);
 556   } else {
 557     // VM thread is gone, just exit
 558     vm_direct_exit(code);
 559   }
 560   ShouldNotReachHere();
 561 }
 562 
 563 void notify_vm_shutdown() {
 564   // For now, just a dtrace probe.
 565   HOTSPOT_VM_SHUTDOWN();
 566   HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
 567 }
 568 
 569 void vm_direct_exit(int code) {
 570   notify_vm_shutdown();
 571   os::wait_for_keypress_at_exit();
 572   os::exit(code);
 573 }
 574 
 575 void vm_perform_shutdown_actions() {
 576   if (is_init_completed()) {
 577     Thread* thread = Thread::current_or_null();
 578     if (thread != NULL && thread->is_Java_thread()) {
 579       // We are leaving the VM, set state to native (in case any OS exit
 580       // handlers call back to the VM)
 581       JavaThread* jt = (JavaThread*)thread;
 582       // Must always be walkable or have no last_Java_frame when in
 583       // thread_in_native
 584       jt->frame_anchor()->make_walkable(jt);
 585       jt->set_thread_state(_thread_in_native);
 586     }
 587   }
 588   notify_vm_shutdown();
 589 }
 590 
 591 void vm_shutdown()
 592 {
 593   vm_perform_shutdown_actions();
 594   os::wait_for_keypress_at_exit();
 595   os::shutdown();
 596 }
 597 
 598 void vm_abort(bool dump_core) {
 599   vm_perform_shutdown_actions();
 600   os::wait_for_keypress_at_exit();
 601 
 602   // Flush stdout and stderr before abort.
 603   fflush(stdout);
 604   fflush(stderr);
 605 
 606   os::abort(dump_core);
 607   ShouldNotReachHere();
 608 }
 609 
 610 void vm_notify_during_cds_dumping(const char* error, const char* message) {
 611   if (error != NULL) {
 612     tty->print_cr("Error occurred during CDS dumping");
 613     tty->print("%s", error);
 614     if (message != NULL) {
 615       tty->print_cr(": %s", message);
 616     }
 617     else {
 618       tty->cr();
 619     }
 620   }
 621 }
 622 
 623 void vm_exit_during_cds_dumping(const char* error, const char* message) {
 624   vm_notify_during_cds_dumping(error, message);
 625 
 626   // Failure during CDS dumping, we don't want to dump core
 627   vm_abort(false);
 628 }
 629 
 630 void vm_notify_during_shutdown(const char* error, const char* message) {
 631   if (error != NULL) {
 632     tty->print_cr("Error occurred during initialization of VM");
 633     tty->print("%s", error);
 634     if (message != NULL) {
 635       tty->print_cr(": %s", message);
 636     }
 637     else {
 638       tty->cr();
 639     }
 640   }
 641   if (ShowMessageBoxOnError && WizardMode) {
 642     fatal("Error occurred during initialization of VM");
 643   }
 644 }
 645 
 646 void vm_exit_during_initialization() {
 647   vm_notify_during_shutdown(NULL, NULL);
 648 
 649   // Failure during initialization, we don't want to dump core
 650   vm_abort(false);
 651 }
 652 
 653 void vm_exit_during_initialization(Handle exception) {
 654   tty->print_cr("Error occurred during initialization of VM");
 655   // If there are exceptions on this thread it must be cleared
 656   // first and here. Any future calls to EXCEPTION_MARK requires
 657   // that no pending exceptions exist.
 658   Thread *THREAD = Thread::current(); // can't be NULL
 659   if (HAS_PENDING_EXCEPTION) {
 660     CLEAR_PENDING_EXCEPTION;
 661   }
 662   java_lang_Throwable::print_stack_trace(exception, tty);
 663   tty->cr();
 664   vm_notify_during_shutdown(NULL, NULL);
 665 
 666   // Failure during initialization, we don't want to dump core
 667   vm_abort(false);
 668 }
 669 
 670 void vm_exit_during_initialization(Symbol* ex, const char* message) {
 671   ResourceMark rm;
 672   vm_notify_during_shutdown(ex->as_C_string(), message);
 673 
 674   // Failure during initialization, we don't want to dump core
 675   vm_abort(false);
 676 }
 677 
 678 void vm_exit_during_initialization(const char* error, const char* message) {
 679   vm_notify_during_shutdown(error, message);
 680 
 681   // Failure during initialization, we don't want to dump core
 682   vm_abort(false);
 683 }
 684 
 685 void vm_shutdown_during_initialization(const char* error, const char* message) {
 686   vm_notify_during_shutdown(error, message);
 687   vm_shutdown();
 688 }
 689 
 690 JDK_Version JDK_Version::_current;
 691 const char* JDK_Version::_runtime_name;
 692 const char* JDK_Version::_runtime_version;
 693 const char* JDK_Version::_runtime_vendor_version;
 694 const char* JDK_Version::_runtime_vendor_vm_bug_url;
 695 
 696 void JDK_Version::initialize() {
 697   jdk_version_info info;
 698   assert(!_current.is_valid(), "Don't initialize twice");
 699 
 700   void *lib_handle = os::native_java_library();
 701   jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
 702      os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
 703 
 704   assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223");
 705 
 706   (*func)(&info, sizeof(info));
 707 
 708   int major = JDK_VERSION_MAJOR(info.jdk_version);
 709   int minor = JDK_VERSION_MINOR(info.jdk_version);
 710   int security = JDK_VERSION_SECURITY(info.jdk_version);
 711   int build = JDK_VERSION_BUILD(info.jdk_version);
 712 
 713   _current = JDK_Version(major, minor, security, info.patch_version, build);
 714 }
 715 
 716 void JDK_Version_init() {
 717   JDK_Version::initialize();
 718 }
 719 
 720 static int64_t encode_jdk_version(const JDK_Version& v) {
 721   return
 722     ((int64_t)v.major_version()          << (BitsPerByte * 4)) |
 723     ((int64_t)v.minor_version()          << (BitsPerByte * 3)) |
 724     ((int64_t)v.security_version()       << (BitsPerByte * 2)) |
 725     ((int64_t)v.patch_version()          << (BitsPerByte * 1)) |
 726     ((int64_t)v.build_number()           << (BitsPerByte * 0));
 727 }
 728 
 729 int JDK_Version::compare(const JDK_Version& other) const {
 730   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
 731   uint64_t e = encode_jdk_version(*this);
 732   uint64_t o = encode_jdk_version(other);
 733   return (e > o) ? 1 : ((e == o) ? 0 : -1);
 734 }
 735 
 736 void JDK_Version::to_string(char* buffer, size_t buflen) const {
 737   assert(buffer && buflen > 0, "call with useful buffer");
 738   size_t index = 0;
 739 
 740   if (!is_valid()) {
 741     jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
 742   } else {
 743     int rc = jio_snprintf(
 744         &buffer[index], buflen - index, "%d.%d", _major, _minor);
 745     if (rc == -1) return;
 746     index += rc;
 747     if (_security > 0) {
 748       rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
 749       if (rc == -1) return;
 750       index += rc;
 751     }
 752     if (_patch > 0) {
 753       rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch);
 754       if (rc == -1) return;
 755       index += rc;
 756     }
 757     if (_build > 0) {
 758       rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
 759       if (rc == -1) return;
 760       index += rc;
 761     }
 762   }
 763 }