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 // Buffering to a stringStream, disable internal buffering so it's not done twice.
162 m->print_codes_on(&ss, 0, false);
163 tty->print("%s", ss.as_string()); // print all at once
164 total_size += m->method_data()->size_in_bytes();
165 }
166 tty->print_cr("------------------------------------------------------------------------");
167 tty->print_cr("Total MDO size: %d bytes", total_size);
168 }
169 }
170 }
171
172 void perf_jvm_print_on(outputStream* st);
173
174 void log_vm_init_stats() {
175 LogStreamHandle(Info, init) log;
176 if (log.is_enabled()) {
177 SharedRuntime::print_counters_on(&log);
178 ClassLoader::print_counters(&log);
179 AOTLinkedClassBulkLoader::print_counters_on(&log);
180 log.cr();
181 // FIXME: intermittent crashes
182 // if (CountBytecodesPerThread) {
183 // log.print_cr("Thread info:");
184 // class PrintThreadInfo : public ThreadClosure {
185 // outputStream* _st;
186 // public:
187 // PrintThreadInfo(outputStream* st) : ThreadClosure(), _st(st) {}
188 // void do_thread(Thread* thread) {
189 // JavaThread* jt = JavaThread::cast(thread);
190 // if (jt->bc_counter_value() > 0) {
191 // _st->print_cr(" Thread " INTPTR_FORMAT ": %ld bytecodes executed (clinit: %ld)",
192 // p2i(jt), /*jt->name(),*/ jt->bc_counter_value(), jt->clinit_bc_counter_value());
193 // }
194 // }
195 // };
196 // PrintThreadInfo cl(&log);
197 // Threads::java_threads_do(&cl);
198 // }
199 // log.cr();
200 log.print_cr("Deoptimization events: ");
201 Deoptimization::print_statistics_on(&log);
202 log.cr();
203
204 log.print("Compilation statistics: ");
205 CompileBroker::print_statistics_on(&log);
206 log.cr();
207
208 {
209 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
210 log.print("Code cache statistics: ");
211 CodeCache::print_nmethod_statistics_on(&log);
212 log.cr();
213 }
214
215 if (AOTCodeCache::is_on_for_use()) {
216 log.print_cr("Startup Code Cache: ");
217 AOTCodeCache::print_statistics_on(&log);
218 log.cr();
219 AOTCodeCache::print_timers_on(&log);
220 }
221
222 VMThread::print_counters_on(&log);
223 log.cr();
224 MutexLockerImpl::print_counters_on(&log);
225 log.cr();
226 log.print("Runtime events for thread \"main\"");
227 if (ProfileRuntimeCalls) {
228 log.print_cr(" (%d nested events):", ProfileVMCallContext::nested_runtime_calls_count());
229
230 InterpreterRuntime::print_counters_on(&log);
231 #ifdef COMPILER1
232 Runtime1::print_counters_on(&log);
233 #endif
234 #ifdef COMPILER2
235 OptoRuntime::print_counters_on(&log);
236 Deoptimization::print_counters_on(&log);
237 #endif
238 } else {
239 log.print_cr(": no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
240 }
241 log.cr();
242 perf_jvm_print_on(&log);
243 log.cr();
244 MethodHandles::print_counters_on(&log);
245 }
246 }
247
248 void print_bytecode_count() {
249 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
250 tty->print_cr("[BytecodeCounter::counter_value = %zu]", BytecodeCounter::counter_value());
251 }
252 }
253
254 #ifndef PRODUCT
255
256 // Statistics printing (method invocation histogram)
257
258 GrowableArray<Method*>* collected_invoked_methods;
259
260 static void collect_invoked_methods(Method* m) {
261 if (m->invocation_count() + m->compiled_invocation_count() >= 1) {
262 collected_invoked_methods->push(m);
263 }
264 }
265
266
267 // Invocation count accumulators should be unsigned long to shift the
268 // overflow border. Longer-running workloads tend to create invocation
269 // counts which already overflow 32-bit counters for individual methods.
270 static void print_method_invocation_histogram() {
271 ResourceMark rm;
272 collected_invoked_methods = new GrowableArray<Method*>(1024);
273 SystemDictionary::methods_do(collect_invoked_methods);
274 collected_invoked_methods->sort(&compare_methods);
275 //
276 tty->cr();
277 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = %zd):", MethodHistogramCutoff);
278 tty->cr();
279 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
280 uint64_t total = 0,
281 int_total = 0,
282 comp_total = 0,
283 special_total= 0,
284 static_total = 0,
285 final_total = 0,
286 synch_total = 0,
287 native_total = 0,
288 access_total = 0;
289 for (int index = 0; index < collected_invoked_methods->length(); index++) {
290 // Counter values returned from getter methods are signed int.
291 // To shift the overflow border by a factor of two, we interpret
292 // them here as unsigned long. A counter can't be negative anyway.
293 Method* m = collected_invoked_methods->at(index);
294 uint64_t iic = (uint64_t)m->invocation_count();
295 uint64_t cic = (uint64_t)m->compiled_invocation_count();
296 if ((iic + cic) >= (uint64_t)MethodHistogramCutoff) m->print_invocation_count(tty);
297 int_total += iic;
298 comp_total += cic;
299 if (m->is_final()) final_total += iic + cic;
300 if (m->is_static()) static_total += iic + cic;
301 if (m->is_synchronized()) synch_total += iic + cic;
302 if (m->is_native()) native_total += iic + cic;
303 if (m->is_accessor()) access_total += iic + cic;
304 }
305 tty->cr();
306 total = int_total + comp_total;
307 special_total = final_total + static_total +synch_total + native_total + access_total;
308 tty->print_cr("Invocations summary for %d methods:", collected_invoked_methods->length());
309 double total_div = (double)total;
310 tty->print_cr("\t" UINT64_FORMAT_W(12) " (100%%) total", total);
311 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- interpreted", int_total, 100.0 * (double)int_total / total_div);
312 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- compiled", comp_total, 100.0 * (double)comp_total / total_div);
313 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- special methods (interpreted and compiled)",
314 special_total, 100.0 * (double)special_total/ total_div);
315 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- synchronized",synch_total, 100.0 * (double)synch_total / total_div);
316 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- final", final_total, 100.0 * (double)final_total / total_div);
317 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- static", static_total, 100.0 * (double)static_total / total_div);
318 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- native", native_total, 100.0 * (double)native_total / total_div);
319 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- accessor", access_total, 100.0 * (double)access_total / total_div);
320 tty->cr();
321 SharedRuntime::print_call_statistics_on(tty);
322
323 }
324
325 #else
326
327 static void print_method_invocation_histogram() {}
328
329 #endif // PRODUCT
330
331
332 // General statistics printing (profiling ...)
333 void print_statistics_before_exit() {
334 #if INCLUDE_CDS
335 if (AOTReplayTraining && AOTPrintTrainingInfo) {
336 TrainingData::print_archived_training_data_on(tty);
337 }
338 #endif
339 if (CITime) {
340 CompileBroker::print_times();
341 }
342
343 #ifdef COMPILER1
344 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
345 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
346 Runtime1::print_statistics_on(tty);
347 SharedRuntime::print_statistics();
348 }
349 #endif /* COMPILER1 */
350
351 #ifdef COMPILER2
352 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
353 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
354 Compile::print_statistics();
355 Deoptimization::print_statistics();
356 #ifndef COMPILER1
357 SharedRuntime::print_statistics();
358 #endif //COMPILER1
359 }
360
361 if (PrintLockStatistics) {
362 OptoRuntime::print_named_counters();
363 }
364 #ifdef ASSERT
365 if (CollectIndexSetStatistics) {
366 IndexSet::print_statistics();
367 }
368 #endif // ASSERT
369 #else // COMPILER2
370 #if INCLUDE_JVMCI
371 #ifndef COMPILER1
372 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
373 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
374 Deoptimization::print_statistics();
375 SharedRuntime::print_statistics();
376 }
377 #endif // COMPILER1
378 #endif // INCLUDE_JVMCI
379 #endif // COMPILER2
380
381 if (PrintNMethodStatistics) {
382 nmethod::print_statistics();
383 }
384 if (CountCompiledCalls) {
385 print_method_invocation_histogram();
386 }
387
388 print_method_profiling_data();
389
390 if (TimeOopMap) {
391 GenerateOopMap::print_time();
392 }
393 if (PrintSymbolTableSizeHistogram) {
394 SymbolTable::print_histogram();
395 }
396 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
397 BytecodeCounter::print();
398 }
399 if (PrintBytecodePairHistogram) {
400 BytecodePairHistogram::print();
401 }
402
403 if (PrintCodeCache) {
404 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
405 CodeCache::print();
406 }
407
408 // CodeHeap State Analytics.
409 if (PrintCodeHeapAnalytics) {
410 CompileBroker::print_heapinfo(nullptr, "all", 4096); // details
411 }
412
413 LogStreamHandle(Debug, codecache, nmethod) log;
414 if (log.is_enabled()) {
415 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
416 CodeCache::print_nmethods_on(&log);
417 }
418
419 #ifndef PRODUCT
420 if (PrintCodeCache2) {
421 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
422 CodeCache::print_internals();
423 }
424 #endif
425
426 if (VerifyOops && Verbose) {
427 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
428 }
429
430 print_bytecode_count();
431
432 if (PrintVMInfoAtExit) {
433 // Use an intermediate stream to prevent deadlocking on tty_lock
434 stringStream ss;
435 VMError::print_vm_info(&ss);
436 tty->print_raw(ss.base());
437 }
438
439 if (PrintSystemDictionaryAtExit) {
440 ResourceMark rm;
441 MutexLocker mcld(ClassLoaderDataGraph_lock);
442 SystemDictionary::print();
443 }
444
445 if (PrintClassLoaderDataGraphAtExit) {
446 ResourceMark rm;
447 MutexLocker mcld(ClassLoaderDataGraph_lock);
448 ClassLoaderDataGraph::print();
449 }
450
451 // Native memory tracking data
452 if (PrintNMTStatistics) {
453 MemTracker::final_report(tty);
454 }
455
456 if (PrintMetaspaceStatisticsAtExit) {
457 MetaspaceUtils::print_basic_report(tty, 0);
458 }
459
460 if (PrintCompilerMemoryStatisticsAtExit) {
461 CompilationMemoryStatistic::print_final_report(tty);
462 }
463
464 ThreadsSMRSupport::log_statistics();
465
466 log_vm_init_stats();
467
468 if (log_is_enabled(Info, perf, class, link)) {
469 LogStreamHandle(Info, perf, class, link) log;
470 log.print_cr("At VM exit:");
471 ClassLoader::print_counters(&log);
472 }
473 }
474
475 // Note: before_exit() can be executed only once, if more than one threads
476 // are trying to shutdown the VM at the same time, only one thread
477 // can run before_exit() and all other threads must wait.
478 void before_exit(JavaThread* thread, bool halt) {
479 #define BEFORE_EXIT_NOT_RUN 0
480 #define BEFORE_EXIT_RUNNING 1
481 #define BEFORE_EXIT_DONE 2
482 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
483
484 Events::log(thread, "Before exit entered");
485
486 // Note: don't use a Mutex to guard the entire before_exit(), as
487 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
488 // A CAS or OSMutex would work just fine but then we need to manipulate
489 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
490 // for synchronization.
491 { MonitorLocker ml(BeforeExit_lock);
492 switch (_before_exit_status) {
493 case BEFORE_EXIT_NOT_RUN:
494 _before_exit_status = BEFORE_EXIT_RUNNING;
495 break;
496 case BEFORE_EXIT_RUNNING:
497 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
498 ml.wait();
499 }
500 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
501 return;
502 case BEFORE_EXIT_DONE:
503 // need block to avoid SS compiler bug
504 {
505 return;
506 }
507 }
508 }
509
510 // At this point only one thread is executing this logic. Any other threads
511 // attempting to invoke before_exit() will wait above and return early once
512 // this thread finishes before_exit().
513
514 // Do not add any additional shutdown logic between the above mutex logic and
515 // leak sanitizer logic below. Any additional shutdown code which performs some
516 // cleanup should be added after the leak sanitizer logic below.
517
518 #ifdef LEAK_SANITIZER
519 // If we are built with LSan, we need to perform leak checking. If we are
520 // terminating normally, not halting and no VM error, we perform a normal
521 // leak check which terminates if leaks are found. If we are not terminating
522 // normally, halting or VM error, we perform a recoverable leak check which
523 // prints leaks but will not terminate.
524 if (!halt && !VMError::is_error_reported()) {
525 LSAN_DO_LEAK_CHECK();
526 } else {
527 // Ignore the return value.
528 static_cast<void>(LSAN_DO_RECOVERABLE_LEAK_CHECK());
529 }
530 #endif
531
532 #if INCLUDE_CDS
533 MethodProfiler::process_method_hotness();
534 // Dynamic CDS dumping must happen whilst we can still reliably
535 // run Java code.
536 DynamicArchive::dump_at_exit(thread);
537 assert(!thread->has_pending_exception(), "must be");
538 #endif
539
540 // Actual shutdown logic begins here.
541
542 #if INCLUDE_JVMCI
543 if (EnableJVMCI) {
544 JVMCI::shutdown(thread);
545 }
546 #endif
547
548 #if INCLUDE_CDS
549 ClassListWriter::write_resolved_constants();
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_before_exit();
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 }