1 /*
  2  * Copyright (c) 1997, 2026, 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 "cds/aotLinkedClassBulkLoader.hpp"
 26 #include "cds/aotMetaspace.hpp"
 27 #include "cds/cds_globals.hpp"
 28 #include "cds/cdsConfig.hpp"
 29 #include "cds/classListWriter.hpp"
 30 #include "cds/dynamicArchive.hpp"
 31 #include "cds/methodProfiler.hpp"
 32 #include "classfile/classLoader.hpp"
 33 #include "classfile/classLoaderDataGraph.hpp"
 34 #include "classfile/javaClasses.hpp"
 35 #include "classfile/stringTable.hpp"
 36 #include "classfile/symbolTable.hpp"
 37 #include "classfile/systemDictionary.hpp"
 38 #include "code/aotCodeCache.hpp"
 39 #include "code/codeCache.hpp"
 40 #include "compiler/compilationMemoryStatistic.hpp"
 41 #include "compiler/compilationPolicy.hpp"
 42 #include "compiler/compileBroker.hpp"
 43 #include "compiler/compilerOracle.hpp"
 44 #include "gc/shared/collectedHeap.hpp"
 45 #include "gc/shared/stringdedup/stringDedup.hpp"
 46 #include "interpreter/bytecodeHistogram.hpp"
 47 #include "interpreter/interpreterRuntime.hpp"
 48 #include "jfr/jfrEvents.hpp"
 49 #include "jfr/support/jfrThreadId.hpp"
 50 #include "jvm.h"
 51 #include "logging/log.hpp"
 52 #include "logging/logStream.hpp"
 53 #include "memory/metaspaceUtils.hpp"
 54 #include "memory/oopFactory.hpp"
 55 #include "memory/resourceArea.hpp"
 56 #include "memory/universe.hpp"
 57 #include "nmt/memMapPrinter.hpp"
 58 #include "nmt/memTracker.hpp"
 59 #include "oops/constantPool.hpp"
 60 #include "oops/generateOopMap.hpp"
 61 #include "oops/instanceKlass.hpp"
 62 #include "oops/instanceOop.hpp"
 63 #include "oops/klassVtable.hpp"
 64 #include "oops/method.inline.hpp"
 65 #include "oops/objArrayOop.hpp"
 66 #include "oops/oop.inline.hpp"
 67 #include "oops/symbol.hpp"
 68 #include "oops/trainingData.hpp"
 69 #include "prims/jvmtiAgentList.hpp"
 70 #include "prims/jvmtiExport.hpp"
 71 #include "prims/methodHandles.hpp"
 72 #include "runtime/continuation.hpp"
 73 #include "runtime/deoptimization.hpp"
 74 #include "runtime/flags/flagSetting.hpp"
 75 #include "runtime/globals_extension.hpp"
 76 #include "runtime/handles.inline.hpp"
 77 #include "runtime/init.hpp"
 78 #include "runtime/interfaceSupport.inline.hpp"
 79 #include "runtime/java.hpp"
 80 #include "runtime/javaThread.hpp"
 81 #include "runtime/os.hpp"
 82 #include "runtime/sharedRuntime.hpp"
 83 #include "runtime/stubRoutines.hpp"
 84 #include "runtime/task.hpp"
 85 #include "runtime/threads.hpp"
 86 #include "runtime/timer.hpp"
 87 #include "runtime/trimNativeHeap.hpp"
 88 #include "runtime/vm_version.hpp"
 89 #include "runtime/vmOperations.hpp"
 90 #include "runtime/vmThread.hpp"
 91 #include "sanitizers/leak.hpp"
 92 #include "utilities/dtrace.hpp"
 93 #include "utilities/events.hpp"
 94 #include "utilities/globalDefinitions.hpp"
 95 #include "utilities/macros.hpp"
 96 #include "utilities/vmError.hpp"
 97 #ifdef COMPILER1
 98 #include "c1/c1_Compiler.hpp"
 99 #include "c1/c1_Runtime1.hpp"
100 #endif
101 #ifdef COMPILER2
102 #include "code/compiledIC.hpp"
103 #include "opto/compile.hpp"
104 #include "opto/indexSet.hpp"
105 #include "opto/runtime.hpp"
106 #endif
107 #if INCLUDE_JFR
108 #include "jfr/jfr.hpp"
109 #endif
110 #if INCLUDE_JVMCI
111 #include "jvmci/jvmci.hpp"
112 #endif
113 
114 GrowableArray<Method*>* collected_profiled_methods;
115 
116 static int compare_methods(Method** a, Method** b) {
117   // compiled_invocation_count() returns int64_t, forcing the entire expression
118   // to be evaluated as int64_t. Overflow is not an issue.
119   int64_t diff = (((*b)->invocation_count() + (*b)->compiled_invocation_count())
120                 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()));
121   return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
122 }
123 
124 static void collect_profiled_methods(Method* m) {
125   Thread* thread = Thread::current();
126   methodHandle mh(thread, m);
127   if ((m->method_data() != nullptr) &&
128       (PrintMethodData || CompilerOracle::should_print(mh))) {
129     collected_profiled_methods->push(m);
130   }
131 }
132 
133 static void print_method_profiling_data() {
134   if ((ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) &&
135      (PrintMethodData || CompilerOracle::should_print_methods())) {
136     ResourceMark rm;
137     collected_profiled_methods = new GrowableArray<Method*>(1024);
138     SystemDictionary::methods_do(collect_profiled_methods);
139     collected_profiled_methods->sort(&compare_methods);
140 
141     int count = collected_profiled_methods->length();
142     int total_size = 0;
143     if (count > 0) {
144       for (int index = 0; index < count; index++) {
145         Method* m = collected_profiled_methods->at(index);
146 
147         // Instead of taking tty lock, we collect all lines into a string stream
148         // and then print them all at once.
149         ResourceMark rm2;
150         stringStream ss;
151 
152         ss.print_cr("------------------------------------------------------------------------");
153         m->print_invocation_count(&ss);
154         ss.print_cr("  mdo size: %d bytes", m->method_data()->size_in_bytes());
155         ss.cr();
156         // Dump data on parameters if any
157         if (m->method_data() != nullptr && m->method_data()->parameters_type_data() != nullptr) {
158           ss.fill_to(2);
159           m->method_data()->parameters_type_data()->print_data_on(&ss);
160         }
161         m->print_codes_on(&ss);
162         tty->print("%s", ss.as_string()); // print all at once
163         total_size += m->method_data()->size_in_bytes();
164       }
165       tty->print_cr("------------------------------------------------------------------------");
166       tty->print_cr("Total MDO size: %d bytes", total_size);
167     }
168   }
169 }
170 
171 void perf_jvm_print_on(outputStream* st);
172 
173 void log_vm_init_stats() {
174   LogStreamHandle(Info, init) log;
175   if (log.is_enabled()) {
176     SharedRuntime::print_counters_on(&log);
177     ClassLoader::print_counters(&log);
178     AOTLinkedClassBulkLoader::print_counters_on(&log);
179     log.cr();
180     // FIXME: intermittent crashes
181 //    if (CountBytecodesPerThread) {
182 //      log.print_cr("Thread info:");
183 //      class PrintThreadInfo : public ThreadClosure {
184 //        outputStream* _st;
185 //      public:
186 //        PrintThreadInfo(outputStream* st) : ThreadClosure(), _st(st) {}
187 //        void do_thread(Thread* thread) {
188 //          JavaThread* jt = JavaThread::cast(thread);
189 //          if (jt->bc_counter_value() > 0) {
190 //            _st->print_cr("  Thread " INTPTR_FORMAT ": %ld bytecodes executed (clinit: %ld)",
191 //                          p2i(jt), /*jt->name(),*/ jt->bc_counter_value(), jt->clinit_bc_counter_value());
192 //          }
193 //        }
194 //      };
195 //      PrintThreadInfo cl(&log);
196 //      Threads::java_threads_do(&cl);
197 //    }
198 //    log.cr();
199     log.print_cr("Deoptimization events: ");
200     Deoptimization::print_statistics_on(&log);
201     log.cr();
202 
203     log.print("Compilation statistics: ");
204     CompileBroker::print_statistics_on(&log);
205     log.cr();
206 
207     {
208       MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
209       log.print("Code cache statistics: ");
210       CodeCache::print_nmethod_statistics_on(&log);
211       log.cr();
212     }
213 
214     if (AOTCodeCache::is_on_for_use()) {
215       log.print_cr("Startup Code Cache: ");
216       AOTCodeCache::print_statistics_on(&log);
217       log.cr();
218       AOTCodeCache::print_timers_on(&log);
219     }
220 
221     VMThread::print_counters_on(&log);
222     log.cr();
223     MutexLockerImpl::print_counters_on(&log);
224     log.cr();
225     log.print("Runtime events for thread \"main\"");
226     if (ProfileRuntimeCalls) {
227       log.print_cr(" (%d nested events):", ProfileVMCallContext::nested_runtime_calls_count());
228 
229       InterpreterRuntime::print_counters_on(&log);
230 #ifdef COMPILER1
231       Runtime1::print_counters_on(&log);
232 #endif
233 #ifdef COMPILER2
234       OptoRuntime::print_counters_on(&log);
235       Deoptimization::print_counters_on(&log);
236 #endif
237     } else {
238       log.print_cr(": no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
239     }
240     log.cr();
241     perf_jvm_print_on(&log);
242     log.cr();
243     MethodHandles::print_counters_on(&log);
244   }
245 }
246 
247 void print_bytecode_count() {
248   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
249     tty->print_cr("[BytecodeCounter::counter_value = %zu]", BytecodeCounter::counter_value());
250   }
251 }
252 
253 #ifndef PRODUCT
254 
255 // Statistics printing (method invocation histogram)
256 
257 GrowableArray<Method*>* collected_invoked_methods;
258 
259 static void collect_invoked_methods(Method* m) {
260   if (m->invocation_count() + m->compiled_invocation_count() >= 1) {
261     collected_invoked_methods->push(m);
262   }
263 }
264 
265 
266 // Invocation count accumulators should be unsigned long to shift the
267 // overflow border. Longer-running workloads tend to create invocation
268 // counts which already overflow 32-bit counters for individual methods.
269 static void print_method_invocation_histogram() {
270   ResourceMark rm;
271   collected_invoked_methods = new GrowableArray<Method*>(1024);
272   SystemDictionary::methods_do(collect_invoked_methods);
273   collected_invoked_methods->sort(&compare_methods);
274   //
275   tty->cr();
276   tty->print_cr("Histogram Over Method Invocation Counters (cutoff = %zd):", MethodHistogramCutoff);
277   tty->cr();
278   tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
279   uint64_t total        = 0,
280            int_total    = 0,
281            comp_total   = 0,
282            special_total= 0,
283            static_total = 0,
284            final_total  = 0,
285            synch_total  = 0,
286            native_total = 0,
287            access_total = 0;
288   for (int index = 0; index < collected_invoked_methods->length(); index++) {
289     // Counter values returned from getter methods are signed int.
290     // To shift the overflow border by a factor of two, we interpret
291     // them here as unsigned long. A counter can't be negative anyway.
292     Method* m = collected_invoked_methods->at(index);
293     uint64_t iic = (uint64_t)m->invocation_count();
294     uint64_t cic = (uint64_t)m->compiled_invocation_count();
295     if ((iic + cic) >= (uint64_t)MethodHistogramCutoff) m->print_invocation_count(tty);
296     int_total  += iic;
297     comp_total += cic;
298     if (m->is_final())        final_total  += iic + cic;
299     if (m->is_static())       static_total += iic + cic;
300     if (m->is_synchronized()) synch_total  += iic + cic;
301     if (m->is_native())       native_total += iic + cic;
302     if (m->is_accessor())     access_total += iic + cic;
303   }
304   tty->cr();
305   total = int_total + comp_total;
306   special_total = final_total + static_total +synch_total + native_total + access_total;
307   tty->print_cr("Invocations summary for %d methods:", collected_invoked_methods->length());
308   double total_div = (double)total;
309   tty->print_cr("\t" UINT64_FORMAT_W(12) " (100%%)  total",           total);
310   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- interpreted", int_total,     100.0 * (double)int_total    / total_div);
311   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- compiled",    comp_total,    100.0 * (double)comp_total   / total_div);
312   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- special methods (interpreted and compiled)",
313                                                                          special_total, 100.0 * (double)special_total/ total_div);
314   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%)    |- synchronized",synch_total,   100.0 * (double)synch_total  / total_div);
315   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%)    |- final",       final_total,   100.0 * (double)final_total  / total_div);
316   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%)    |- static",      static_total,  100.0 * (double)static_total / total_div);
317   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%)    |- native",      native_total,  100.0 * (double)native_total / total_div);
318   tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%)    |- accessor",    access_total,  100.0 * (double)access_total / total_div);
319   tty->cr();
320   SharedRuntime::print_call_statistics_on(tty);

321 




322 }
323 
324 #else
325 
326 static void print_method_invocation_histogram() {}

327 
328 #endif // PRODUCT
329 
330 
331 // General statistics printing (profiling ...)
332 void print_statistics() {
333 #if INCLUDE_CDS
334   if (AOTReplayTraining && AOTPrintTrainingInfo) {
335     TrainingData::print_archived_training_data_on(tty);
336   }
337 #endif
338   if (CITime) {
339     CompileBroker::print_times();
340   }
341 
342 #ifdef COMPILER1
343   if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
344     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
345     Runtime1::print_statistics_on(tty);
346     SharedRuntime::print_statistics();
347   }
348 #endif /* COMPILER1 */
349 
350 #ifdef COMPILER2
351   if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
352     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
353     Compile::print_statistics();
354     Deoptimization::print_statistics();
355 #ifndef COMPILER1
356     SharedRuntime::print_statistics();
357 #endif //COMPILER1
358   }
359 
360   if (PrintLockStatistics) {
361     OptoRuntime::print_named_counters();
362   }
363 #ifdef ASSERT
364   if (CollectIndexSetStatistics) {
365     IndexSet::print_statistics();
366   }
367 #endif // ASSERT
368 #else // COMPILER2
369 #if INCLUDE_JVMCI
370 #ifndef COMPILER1
371   if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
372     FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
373     Deoptimization::print_statistics();
374     SharedRuntime::print_statistics();
375   }
376 #endif // COMPILER1
377 #endif // INCLUDE_JVMCI
378 #endif // COMPILER2
379 
380   if (PrintNMethodStatistics) {
381     nmethod::print_statistics();
382   }
383   if (CountCompiledCalls) {
384     print_method_invocation_histogram();
385   }
386 
387   print_method_profiling_data();
388 
389   if (TimeOopMap) {
390     GenerateOopMap::print_time();
391   }
392   if (PrintSymbolTableSizeHistogram) {
393     SymbolTable::print_histogram();
394   }
395   if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
396     BytecodeCounter::print();
397   }
398   if (PrintBytecodePairHistogram) {
399     BytecodePairHistogram::print();
400   }
401 
402   if (PrintCodeCache) {
403     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
404     CodeCache::print();
405   }
406 
407   // CodeHeap State Analytics.
408   if (PrintCodeHeapAnalytics) {
409     CompileBroker::print_heapinfo(nullptr, "all", 4096); // details
410   }
411 
412   LogStreamHandle(Debug, codecache, nmethod) log;
413   if (log.is_enabled()) {
414     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
415     CodeCache::print_nmethods_on(&log);
416   }
417 
418 #ifndef PRODUCT
419   if (PrintCodeCache2) {
420     MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
421     CodeCache::print_internals();
422   }
423 #endif
424 
425   if (VerifyOops && Verbose) {
426     tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
427   }
428 
429   print_bytecode_count();
430 
431   if (PrintVMInfoAtExit) {
432     // Use an intermediate stream to prevent deadlocking on tty_lock
433     stringStream ss;
434     VMError::print_vm_info(&ss);
435     tty->print_raw(ss.base());
436   }
437 
438   if (PrintSystemDictionaryAtExit) {
439     ResourceMark rm;
440     MutexLocker mcld(ClassLoaderDataGraph_lock);
441     SystemDictionary::print();
442   }
443 
444   if (PrintClassLoaderDataGraphAtExit) {
445     ResourceMark rm;
446     MutexLocker mcld(ClassLoaderDataGraph_lock);
447     ClassLoaderDataGraph::print();
448   }
449 
450   // Native memory tracking data
451   if (PrintNMTStatistics) {
452     MemTracker::final_report(tty);
453   }
454 
455   if (PrintMetaspaceStatisticsAtExit) {
456     MetaspaceUtils::print_basic_report(tty, 0);
457   }
458 
459   if (PrintCompilerMemoryStatisticsAtExit) {
460     CompilationMemoryStatistic::print_final_report(tty);
461   }
462 
463   ThreadsSMRSupport::log_statistics();
464 
465   log_vm_init_stats();
466 
467   if (log_is_enabled(Info, perf, class, link)) {
468     LogStreamHandle(Info, perf, class, link) log;
469     log.print_cr("At VM exit:");
470     ClassLoader::print_counters(&log);
471   }
472 }
473 
474 // Note: before_exit() can be executed only once, if more than one threads
475 //       are trying to shutdown the VM at the same time, only one thread
476 //       can run before_exit() and all other threads must wait.
477 void before_exit(JavaThread* thread, bool halt) {
478   #define BEFORE_EXIT_NOT_RUN 0
479   #define BEFORE_EXIT_RUNNING 1
480   #define BEFORE_EXIT_DONE    2
481   static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
482 
483   Events::log(thread, "Before exit entered");
484 
485   // Note: don't use a Mutex to guard the entire before_exit(), as
486   // JVMTI post_thread_end_event and post_vm_death_event will run native code.
487   // A CAS or OSMutex would work just fine but then we need to manipulate
488   // thread state for Safepoint. Here we use Monitor wait() and notify_all()
489   // for synchronization.
490   { MonitorLocker ml(BeforeExit_lock);
491     switch (_before_exit_status) {
492     case BEFORE_EXIT_NOT_RUN:
493       _before_exit_status = BEFORE_EXIT_RUNNING;
494       break;
495     case BEFORE_EXIT_RUNNING:
496       while (_before_exit_status == BEFORE_EXIT_RUNNING) {
497         ml.wait();
498       }
499       assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
500       return;
501     case BEFORE_EXIT_DONE:
502       // need block to avoid SS compiler bug
503       {
504         return;
505       }
506     }
507   }
508 
509   // At this point only one thread is executing this logic. Any other threads
510   // attempting to invoke before_exit() will wait above and return early once
511   // this thread finishes before_exit().
512 
513   // Do not add any additional shutdown logic between the above mutex logic and
514   // leak sanitizer logic below. Any additional shutdown code which performs some
515   // cleanup should be added after the leak sanitizer logic below.
516 
517 #ifdef LEAK_SANITIZER
518   // If we are built with LSan, we need to perform leak checking. If we are
519   // terminating normally, not halting and no VM error, we perform a normal
520   // leak check which terminates if leaks are found. If we are not terminating
521   // normally, halting or VM error, we perform a recoverable leak check which
522   // prints leaks but will not terminate.
523   if (!halt && !VMError::is_error_reported()) {
524     LSAN_DO_LEAK_CHECK();
525   } else {
526     // Ignore the return value.
527     static_cast<void>(LSAN_DO_RECOVERABLE_LEAK_CHECK());
528   }
529 #endif
530 
531 #if INCLUDE_CDS
532   MethodProfiler::process_method_hotness();
533   // Dynamic CDS dumping must happen whilst we can still reliably
534   // run Java code.
535   DynamicArchive::dump_at_exit(thread);
536   assert(!thread->has_pending_exception(), "must be");
537 #endif
538 
539   // Actual shutdown logic begins here.
540 
541 #if INCLUDE_JVMCI
542   if (EnableJVMCI) {
543     JVMCI::shutdown(thread);
544   }
545 #endif
546 
547 #if INCLUDE_CDS
548   ClassListWriter::write_resolved_constants();
549   ClassListWriter::write_reflection_data();
550   ClassListWriter::write_loader_negative_lookup_cache();
551   if (CDSConfig::is_dumping_preimage_static_archive()) {
552     AOTMetaspace::dump_static_archive(thread);
553   }
554 #endif
555 
556   // Hang forever on exit if we're reporting an error.
557   if (ShowMessageBoxOnError && VMError::is_error_reported()) {
558     os::infinite_sleep();
559   }
560 
561   EventThreadEnd event;
562   if (event.should_commit()) {
563     event.set_thread(JFR_JVM_THREAD_ID(thread));
564     event.commit();
565   }
566 
567   JFR_ONLY(Jfr::on_vm_shutdown(false, halt);)
568 
569   // Stop the WatcherThread. We do this before disenrolling various
570   // PeriodicTasks to reduce the likelihood of races.
571   WatcherThread::stop();
572 
573   NativeHeapTrimmer::cleanup();
574 
575   if (JvmtiExport::should_post_thread_life()) {
576     JvmtiExport::post_thread_end(thread);
577   }
578 
579   // Always call even when there are not JVMTI environments yet, since environments
580   // may be attached late and JVMTI must track phases of VM execution.
581   JvmtiExport::post_vm_death();
582   JvmtiAgentList::unload_agents();
583 
584   // No user code can be executed in the current thread after this point.
585 
586   // Run before exit and then stop concurrent GC threads.
587   Universe::before_exit();
588 
589   if (PrintBytecodeHistogram) {
590     BytecodeHistogram::print(PrintBytecodeHistogramCutoff);
591   }
592 
593 #ifdef LINUX
594   if (DumpPerfMapAtExit) {
595     CodeCache::write_perf_map(nullptr, tty);
596   }
597   if (PrintMemoryMapAtExit) {
598     MemMapPrinter::print_all_mappings(tty);
599   }
600 #endif
601 
602   // Terminate the signal thread
603   // Note: we don't wait until it actually dies.
604   os::terminate_signal_thread();
605 
606   #if INCLUDE_CDS
607   if (AOTVerifyTrainingData) {
608     TrainingData::verify();
609   }
610   #endif
611 
612   print_statistics();
613 
614   { MutexLocker ml(BeforeExit_lock);
615     _before_exit_status = BEFORE_EXIT_DONE;
616     BeforeExit_lock->notify_all();
617   }
618 
619   if (VerifyStringTableAtExit) {
620     size_t fail_cnt = StringTable::verify_and_compare_entries();
621     if (fail_cnt != 0) {
622       tty->print_cr("ERROR: fail_cnt=%zu", fail_cnt);
623       guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
624     }
625   }
626 
627   #undef BEFORE_EXIT_NOT_RUN
628   #undef BEFORE_EXIT_RUNNING
629   #undef BEFORE_EXIT_DONE
630 }
631 
632 void vm_exit(int code) {
633   Thread* thread =
634       ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : nullptr;
635   if (thread == nullptr) {
636     // very early initialization failure -- just exit
637     vm_direct_exit(code);
638   }
639 
640   // We'd like to add an entry to the XML log to show that the VM is
641   // terminating, but we can't safely do that here. The logic to make
642   // XML termination logging safe is tied to the termination of the
643   // VMThread, and it doesn't terminate on this exit path. See 8222534.
644 
645   if (VMThread::vm_thread() != nullptr) {
646     if (thread->is_Java_thread()) {
647       // We must be "in_vm" for the code below to work correctly.
648       // Historically there must have been some exit path for which
649       // that was not the case and so we set it explicitly - even
650       // though we no longer know what that path may be.
651       JavaThread::cast(thread)->set_thread_state(_thread_in_vm);
652     }
653 
654     // Fire off a VM_Exit operation to bring VM to a safepoint and exit
655     VM_Exit op(code);
656 
657     // 4945125 The vm thread comes to a safepoint during exit.
658     // GC vm_operations can get caught at the safepoint, and the
659     // heap is unparseable if they are caught. Grab the Heap_lock
660     // to prevent this. The GC vm_operations will not be able to
661     // queue until after we release it, but we never do that as we
662     // are terminating the VM process.
663     MutexLocker ml(Heap_lock);
664 
665     VMThread::execute(&op);
666     // should never reach here; but in case something wrong with VM Thread.
667     vm_direct_exit(code);
668   } else {
669     // VM thread is gone, just exit
670     vm_direct_exit(code);
671   }
672   ShouldNotReachHere();
673 }
674 
675 void notify_vm_shutdown() {
676   // For now, just a dtrace probe.
677   HOTSPOT_VM_SHUTDOWN();
678 }
679 
680 void vm_direct_exit(int code) {
681   notify_vm_shutdown();
682   os::wait_for_keypress_at_exit();
683   os::exit(code);
684 }
685 
686 void vm_direct_exit(int code, const char* message) {
687   if (message != nullptr) {
688     tty->print_cr("%s", message);
689   }
690   vm_direct_exit(code);
691 }
692 
693 static void vm_perform_shutdown_actions() {
694   if (is_init_completed()) {
695     Thread* thread = Thread::current_or_null();
696     if (thread != nullptr && thread->is_Java_thread()) {
697       // We are leaving the VM, set state to native (in case any OS exit
698       // handlers call back to the VM)
699       JavaThread* jt = JavaThread::cast(thread);
700       // Must always be walkable or have no last_Java_frame when in
701       // thread_in_native
702       jt->frame_anchor()->make_walkable();
703       jt->set_thread_state(_thread_in_native);
704     }
705   }
706   notify_vm_shutdown();
707 }
708 
709 void vm_shutdown()
710 {
711   vm_perform_shutdown_actions();
712   os::wait_for_keypress_at_exit();
713   os::shutdown();
714 }
715 
716 void vm_abort(bool dump_core) {
717   vm_perform_shutdown_actions();
718   os::wait_for_keypress_at_exit();
719 
720   // Flush stdout and stderr before abort.
721   fflush(stdout);
722   fflush(stderr);
723 
724   os::abort(dump_core);
725   ShouldNotReachHere();
726 }
727 
728 static void vm_notify_during_cds_dumping(const char* error, const char* message) {
729   if (error != nullptr) {
730     tty->print_cr("Error occurred during CDS dumping");
731     tty->print("%s", error);
732     if (message != nullptr) {
733       tty->print_cr(": %s", message);
734     }
735     else {
736       tty->cr();
737     }
738   }
739 }
740 
741 void vm_exit_during_cds_dumping(const char* error, const char* message) {
742   vm_notify_during_cds_dumping(error, message);
743 
744   // Failure during CDS dumping, we don't want to dump core
745   vm_abort(false);
746 }
747 
748 static void vm_notify_during_shutdown(const char* error, const char* message) {
749   if (error != nullptr) {
750     tty->print_cr("Error occurred during initialization of VM");
751     tty->print("%s", error);
752     if (message != nullptr) {
753       tty->print_cr(": %s", message);
754     }
755     else {
756       tty->cr();
757     }
758   }
759   if (ShowMessageBoxOnError && WizardMode) {
760     fatal("Error occurred during initialization of VM");
761   }
762 }
763 
764 void vm_exit_during_initialization() {
765   vm_notify_during_shutdown(nullptr, nullptr);
766 
767   // Failure during initialization, we don't want to dump core
768   vm_abort(false);
769 }
770 
771 void vm_exit_during_initialization(Handle exception) {
772   tty->print_cr("Error occurred during initialization of VM");
773   // If there are exceptions on this thread it must be cleared
774   // first and here. Any future calls to EXCEPTION_MARK requires
775   // that no pending exceptions exist.
776   JavaThread* THREAD = JavaThread::current(); // can't be null
777   if (HAS_PENDING_EXCEPTION) {
778     CLEAR_PENDING_EXCEPTION;
779   }
780   java_lang_Throwable::print_stack_trace(exception, tty);
781   tty->cr();
782   vm_notify_during_shutdown(nullptr, nullptr);
783 
784   // Failure during initialization, we don't want to dump core
785   vm_abort(false);
786 }
787 
788 void vm_exit_during_initialization(Symbol* ex, const char* message) {
789   ResourceMark rm;
790   vm_notify_during_shutdown(ex->as_C_string(), message);
791 
792   // Failure during initialization, we don't want to dump core
793   vm_abort(false);
794 }
795 
796 void vm_exit_during_initialization(const char* error, const char* message) {
797   vm_notify_during_shutdown(error, message);
798 
799   // Failure during initialization, we don't want to dump core
800   vm_abort(false);
801 }
802 
803 void vm_shutdown_during_initialization(const char* error, const char* message) {
804   vm_notify_during_shutdown(error, message);
805   vm_shutdown();
806 }
807 
808 JDK_Version JDK_Version::_current;
809 const char* JDK_Version::_java_version;
810 const char* JDK_Version::_runtime_name;
811 const char* JDK_Version::_runtime_version;
812 const char* JDK_Version::_runtime_vendor_version;
813 const char* JDK_Version::_runtime_vendor_vm_bug_url;
814 
815 void JDK_Version::initialize() {
816   assert(!_current.is_valid(), "Don't initialize twice");
817 
818   int major = VM_Version::vm_major_version();
819   int minor = VM_Version::vm_minor_version();
820   int security = VM_Version::vm_security_version();
821   int build = VM_Version::vm_build_number();
822   int patch = VM_Version::vm_patch_version();
823   _current = JDK_Version(major, minor, security, patch, build);
824 }
825 
826 void JDK_Version_init() {
827   JDK_Version::initialize();
828 }
829 
830 static int64_t encode_jdk_version(const JDK_Version& v) {
831   return
832     ((int64_t)v.major_version()          << (BitsPerByte * 4)) |
833     ((int64_t)v.minor_version()          << (BitsPerByte * 3)) |
834     ((int64_t)v.security_version()       << (BitsPerByte * 2)) |
835     ((int64_t)v.patch_version()          << (BitsPerByte * 1)) |
836     ((int64_t)v.build_number()           << (BitsPerByte * 0));
837 }
838 
839 int JDK_Version::compare(const JDK_Version& other) const {
840   assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
841   uint64_t e = encode_jdk_version(*this);
842   uint64_t o = encode_jdk_version(other);
843   return (e > o) ? 1 : ((e == o) ? 0 : -1);
844 }
845 
846 /* See JEP 223 */
847 void JDK_Version::to_string(char* buffer, size_t buflen) const {
848   assert((buffer != nullptr) && (buflen > 0), "call with useful buffer");
849   stringStream ss{buffer, buflen};
850   if (!is_valid()) {
851     ss.print_raw("(uninitialized)");
852   } else {
853     ss.print("%d.%d", _major, _minor);
854     if (_patch > 0) {
855       ss.print(".%d.%d", _security, _patch);
856     } else if (_security > 0) {
857       ss.print(".%d", _security);
858     }
859     if (_build > 0) {
860       ss.print("+%d", _build);
861     }
862   }
863 }
864 
865 void JDK_Version::set_java_version(const char* version) {
866   _java_version = os::strdup(version);
867 }
868 
869 void JDK_Version::set_runtime_name(const char* name) {
870   _runtime_name = os::strdup(name);
871 }
872 
873 void JDK_Version::set_runtime_version(const char* version) {
874   _runtime_version = os::strdup(version);
875 }
876 
877 void JDK_Version::set_runtime_vendor_version(const char* vendor_version) {
878   _runtime_vendor_version = os::strdup(vendor_version);
879 }
880 
881 void JDK_Version::set_runtime_vendor_vm_bug_url(const char* vendor_vm_bug_url) {
882   _runtime_vendor_vm_bug_url = os::strdup(vendor_vm_bug_url);
883 }
--- EOF ---