1 /*
2 * Copyright (c) 1997, 2024, 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 "cds/aotLinkedClassBulkLoader.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 "cds/metaspaceShared.hpp"
33 #include "classfile/classLoader.hpp"
34 #include "classfile/classLoaderDataGraph.hpp"
35 #include "classfile/javaClasses.hpp"
36 #include "classfile/stringTable.hpp"
37 #include "classfile/symbolTable.hpp"
38 #include "classfile/systemDictionary.hpp"
39 #include "code/codeCache.hpp"
40 #include "code/SCCache.hpp"
41 #include "compiler/compilationMemoryStatistic.hpp"
42 #include "compiler/compilationPolicy.hpp"
43 #include "compiler/compileBroker.hpp"
44 #include "compiler/compilerOracle.hpp"
45 #include "gc/shared/collectedHeap.hpp"
46 #include "gc/shared/stringdedup/stringDedup.hpp"
47 #include "interpreter/bytecodeHistogram.hpp"
48 #include "interpreter/interpreterRuntime.hpp"
49 #include "jfr/jfrEvents.hpp"
50 #include "jfr/support/jfrThreadId.hpp"
51 #include "jvm.h"
52 #include "logging/log.hpp"
53 #include "logging/logStream.hpp"
54 #include "memory/metaspaceUtils.hpp"
55 #include "memory/oopFactory.hpp"
56 #include "memory/resourceArea.hpp"
57 #include "memory/universe.hpp"
58 #include "nmt/memMapPrinter.hpp"
59 #include "nmt/memTracker.hpp"
60 #include "oops/constantPool.hpp"
61 #include "oops/generateOopMap.hpp"
62 #include "oops/instanceKlass.hpp"
63 #include "oops/instanceOop.hpp"
64 #include "oops/klassVtable.hpp"
65 #include "oops/method.hpp"
66 #include "oops/objArrayOop.hpp"
67 #include "oops/oop.inline.hpp"
68 #include "oops/symbol.hpp"
69 #include "oops/trainingData.hpp"
70 #include "prims/jvmtiAgentList.hpp"
71 #include "prims/jvmtiExport.hpp"
72 #include "prims/methodHandles.hpp"
73 #include "runtime/continuation.hpp"
74 #include "runtime/deoptimization.hpp"
75 #include "runtime/flags/flagSetting.hpp"
76 #include "runtime/globals_extension.hpp"
77 #include "runtime/handles.inline.hpp"
78 #include "runtime/init.hpp"
79 #include "runtime/interfaceSupport.inline.hpp"
80 #include "runtime/java.hpp"
81 #include "runtime/javaThread.hpp"
82 #include "runtime/sharedRuntime.hpp"
83 #include "runtime/statSampler.hpp"
84 #include "runtime/stubRoutines.hpp"
85 #include "runtime/task.hpp"
86 #include "runtime/threads.hpp"
87 #include "runtime/timer.hpp"
88 #include "runtime/trimNativeHeap.hpp"
89 #include "runtime/vmOperations.hpp"
90 #include "runtime/vmThread.hpp"
91 #include "runtime/vm_version.hpp"
92 #include "sanitizers/leak.hpp"
93 #include "utilities/dtrace.hpp"
94 #include "utilities/events.hpp"
95 #include "utilities/globalDefinitions.hpp"
96 #include "utilities/macros.hpp"
97 #include "utilities/vmError.hpp"
98 #ifdef COMPILER1
99 #include "c1/c1_Compiler.hpp"
100 #include "c1/c1_Runtime1.hpp"
101 #endif
102 #ifdef COMPILER2
103 #include "code/compiledIC.hpp"
104 #include "opto/compile.hpp"
105 #include "opto/indexSet.hpp"
106 #include "opto/runtime.hpp"
107 #endif
108 #if INCLUDE_JFR
109 #include "jfr/jfr.hpp"
110 #endif
111 #if INCLUDE_JVMCI
112 #include "jvmci/jvmci.hpp"
113 #endif
114
115 GrowableArray<Method*>* collected_profiled_methods;
116
117 static int compare_methods(Method** a, Method** b) {
118 // compiled_invocation_count() returns int64_t, forcing the entire expression
119 // to be evaluated as int64_t. Overflow is not an issue.
120 int64_t diff = (((*b)->invocation_count() + (*b)->compiled_invocation_count())
121 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()));
122 return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
123 }
124
125 static void collect_profiled_methods(Method* m) {
126 Thread* thread = Thread::current();
127 methodHandle mh(thread, m);
128 if ((m->method_data() != nullptr) &&
129 (PrintMethodData || CompilerOracle::should_print(mh))) {
130 collected_profiled_methods->push(m);
131 }
132 }
133
134 static void print_method_profiling_data() {
135 if ((ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) &&
136 (PrintMethodData || CompilerOracle::should_print_methods())) {
137 ResourceMark rm;
138 collected_profiled_methods = new GrowableArray<Method*>(1024);
139 SystemDictionary::methods_do(collect_profiled_methods);
140 collected_profiled_methods->sort(&compare_methods);
141
142 int count = collected_profiled_methods->length();
143 int total_size = 0;
144 if (count > 0) {
145 for (int index = 0; index < count; index++) {
146 Method* m = collected_profiled_methods->at(index);
147
148 // Instead of taking tty lock, we collect all lines into a string stream
149 // and then print them all at once.
150 ResourceMark rm2;
151 stringStream ss;
152
153 ss.print_cr("------------------------------------------------------------------------");
154 m->print_invocation_count(&ss);
155 ss.print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
156 ss.cr();
157 // Dump data on parameters if any
158 if (m->method_data() != nullptr && m->method_data()->parameters_type_data() != nullptr) {
159 ss.fill_to(2);
160 m->method_data()->parameters_type_data()->print_data_on(&ss);
161 }
162 m->print_codes_on(&ss);
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 (SCCache::is_on_for_read()) {
216 log.print_cr("Startup Code Cache: ");
217 SCCache::print_statistics_on(&log);
218 log.cr();
219 SCCache::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 = " JLONG_FORMAT "]", 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 = " INTX_FORMAT "):", 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 #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 (ReplayTraining && PrintTrainingInfo) {
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 (PrintSystemDictionaryAtExit) {
432 ResourceMark rm;
433 MutexLocker mcld(ClassLoaderDataGraph_lock);
434 SystemDictionary::print();
435 }
436
437 if (PrintClassLoaderDataGraphAtExit) {
438 ResourceMark rm;
439 MutexLocker mcld(ClassLoaderDataGraph_lock);
440 ClassLoaderDataGraph::print();
441 }
442
443 // Native memory tracking data
444 if (PrintNMTStatistics) {
445 MemTracker::final_report(tty);
446 }
447
448 if (PrintMetaspaceStatisticsAtExit) {
449 MetaspaceUtils::print_basic_report(tty, 0);
450 }
451
452 if (CompilerOracle::should_print_final_memstat_report()) {
453 CompilationMemoryStatistic::print_all_by_size(tty, false, 0);
454 }
455
456 ThreadsSMRSupport::log_statistics();
457
458 log_vm_init_stats();
459
460 if (log_is_enabled(Info, perf, class, link)) {
461 LogStreamHandle(Info, perf, class, link) log;
462 log.print_cr("At VM exit:");
463 ClassLoader::print_counters(&log);
464 }
465 }
466
467 // Note: before_exit() can be executed only once, if more than one threads
468 // are trying to shutdown the VM at the same time, only one thread
469 // can run before_exit() and all other threads must wait.
470 void before_exit(JavaThread* thread, bool halt) {
471 #define BEFORE_EXIT_NOT_RUN 0
472 #define BEFORE_EXIT_RUNNING 1
473 #define BEFORE_EXIT_DONE 2
474 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
475
476 Events::log(thread, "Before exit entered");
477
478 // Note: don't use a Mutex to guard the entire before_exit(), as
479 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
480 // A CAS or OSMutex would work just fine but then we need to manipulate
481 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
482 // for synchronization.
483 { MonitorLocker ml(BeforeExit_lock);
484 switch (_before_exit_status) {
485 case BEFORE_EXIT_NOT_RUN:
486 _before_exit_status = BEFORE_EXIT_RUNNING;
487 break;
488 case BEFORE_EXIT_RUNNING:
489 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
490 ml.wait();
491 }
492 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
493 return;
494 case BEFORE_EXIT_DONE:
495 // need block to avoid SS compiler bug
496 {
497 return;
498 }
499 }
500 }
501
502 // At this point only one thread is executing this logic. Any other threads
503 // attempting to invoke before_exit() will wait above and return early once
504 // this thread finishes before_exit().
505
506 // Do not add any additional shutdown logic between the above mutex logic and
507 // leak sanitizer logic below. Any additional shutdown code which performs some
508 // cleanup should be added after the leak sanitizer logic below.
509
510 #ifdef LEAK_SANITIZER
511 // If we are built with LSan, we need to perform leak checking. If we are
512 // terminating normally, not halting and no VM error, we perform a normal
513 // leak check which terminates if leaks are found. If we are not terminating
514 // normally, halting or VM error, we perform a recoverable leak check which
515 // prints leaks but will not terminate.
516 if (!halt && !VMError::is_error_reported()) {
517 LSAN_DO_LEAK_CHECK();
518 } else {
519 // Ignore the return value.
520 static_cast<void>(LSAN_DO_RECOVERABLE_LEAK_CHECK());
521 }
522 #endif
523
524 #if INCLUDE_CDS
525 MethodProfiler::process_method_hotness();
526 #endif
527
528 // Actual shutdown logic begins here.
529
530 #if INCLUDE_JVMCI
531 if (EnableJVMCI) {
532 JVMCI::shutdown(thread);
533 }
534 #endif
535
536 #if INCLUDE_CDS
537 ClassListWriter::write_resolved_constants();
538 ClassListWriter::write_reflection_data();
539 ClassListWriter::write_loader_negative_lookup_cache();
540 // Dynamic CDS dumping must happen whilst we can still reliably
541 // run Java code.
542 if (CDSConfig::is_dumping_preimage_static_archive()) {
543 // Creating the hotspot.cds.preimage file
544 MetaspaceShared::preload_and_dump(thread);
545 } else {
546 DynamicArchive::dump_at_exit(thread, ArchiveClassesAtExit);
547 }
548 assert(!thread->has_pending_exception(), "must be");
549 #endif
550
551 SCCache::close(); // Write final data and close archive
552
553 // Hang forever on exit if we're reporting an error.
554 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
555 os::infinite_sleep();
556 }
557
558 EventThreadEnd event;
559 if (event.should_commit()) {
560 event.set_thread(JFR_JVM_THREAD_ID(thread));
561 event.commit();
562 }
563
564 JFR_ONLY(Jfr::on_vm_shutdown(false, halt);)
565
566 // Stop the WatcherThread. We do this before disenrolling various
567 // PeriodicTasks to reduce the likelihood of races.
568 WatcherThread::stop();
569
570 // shut down the StatSampler task
571 StatSampler::disengage();
572 StatSampler::destroy();
573
574 NativeHeapTrimmer::cleanup();
575
576 // Stop concurrent GC threads
577 Universe::heap()->stop();
578
579 // Print GC/heap related information.
580 Log(gc, heap, exit) log;
581 if (log.is_info()) {
582 ResourceMark rm;
583 LogStream ls_info(log.info());
584 Universe::print_on(&ls_info);
585 if (log.is_trace()) {
586 LogStream ls_trace(log.trace());
587 MutexLocker mcld(ClassLoaderDataGraph_lock);
588 ClassLoaderDataGraph::print_on(&ls_trace);
589 }
590 }
591
592 if (PrintBytecodeHistogram) {
593 BytecodeHistogram::print(PrintBytecodeHistogramCutoff);
594 }
595
596 #ifdef LINUX
597 if (DumpPerfMapAtExit) {
598 CodeCache::write_perf_map(nullptr, tty);
599 }
600 if (PrintMemoryMapAtExit) {
601 MemMapPrinter::print_all_mappings(tty);
602 }
603 #endif
604
605 if (JvmtiExport::should_post_thread_life()) {
606 JvmtiExport::post_thread_end(thread);
607 }
608
609 // Always call even when there are not JVMTI environments yet, since environments
610 // may be attached late and JVMTI must track phases of VM execution
611 JvmtiExport::post_vm_death();
612 JvmtiAgentList::unload_agents();
613
614 // Terminate the signal thread
615 // Note: we don't wait until it actually dies.
616 os::terminate_signal_thread();
617
618 if (VerifyTrainingData) {
619 EXCEPTION_MARK;
620 CompilationPolicy::replay_training_at_init(true, THREAD); // implies TrainingData::verify()
621 }
622
623 print_statistics();
624 Universe::heap()->print_tracing_info();
625
626 { MutexLocker ml(BeforeExit_lock);
627 _before_exit_status = BEFORE_EXIT_DONE;
628 BeforeExit_lock->notify_all();
629 }
630
631 if (VerifyStringTableAtExit) {
632 size_t fail_cnt = StringTable::verify_and_compare_entries();
633 if (fail_cnt != 0) {
634 tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT, fail_cnt);
635 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
636 }
637 }
638
639 #undef BEFORE_EXIT_NOT_RUN
640 #undef BEFORE_EXIT_RUNNING
641 #undef BEFORE_EXIT_DONE
642 }
643
644 void vm_exit(int code) {
645 Thread* thread =
646 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : nullptr;
647 if (thread == nullptr) {
648 // very early initialization failure -- just exit
649 vm_direct_exit(code);
650 }
651
652 // We'd like to add an entry to the XML log to show that the VM is
653 // terminating, but we can't safely do that here. The logic to make
654 // XML termination logging safe is tied to the termination of the
655 // VMThread, and it doesn't terminate on this exit path. See 8222534.
656
657 if (VMThread::vm_thread() != nullptr) {
658 if (thread->is_Java_thread()) {
659 // We must be "in_vm" for the code below to work correctly.
660 // Historically there must have been some exit path for which
661 // that was not the case and so we set it explicitly - even
662 // though we no longer know what that path may be.
663 JavaThread::cast(thread)->set_thread_state(_thread_in_vm);
664 }
665
666 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
667 VM_Exit op(code);
668
669 // 4945125 The vm thread comes to a safepoint during exit.
670 // GC vm_operations can get caught at the safepoint, and the
671 // heap is unparseable if they are caught. Grab the Heap_lock
672 // to prevent this. The GC vm_operations will not be able to
673 // queue until after we release it, but we never do that as we
674 // are terminating the VM process.
675 MutexLocker ml(Heap_lock);
676
677 VMThread::execute(&op);
678 // should never reach here; but in case something wrong with VM Thread.
679 vm_direct_exit(code);
680 } else {
681 // VM thread is gone, just exit
682 vm_direct_exit(code);
683 }
684 ShouldNotReachHere();
685 }
686
687 void notify_vm_shutdown() {
688 // For now, just a dtrace probe.
689 HOTSPOT_VM_SHUTDOWN();
690 }
691
692 void vm_direct_exit(int code) {
693 notify_vm_shutdown();
694 os::wait_for_keypress_at_exit();
695 os::exit(code);
696 }
697
698 void vm_direct_exit(int code, const char* message) {
699 if (message != nullptr) {
700 tty->print_cr("%s", message);
701 }
702 vm_direct_exit(code);
703 }
704
705 static void vm_perform_shutdown_actions() {
706 if (is_init_completed()) {
707 Thread* thread = Thread::current_or_null();
708 if (thread != nullptr && thread->is_Java_thread()) {
709 // We are leaving the VM, set state to native (in case any OS exit
710 // handlers call back to the VM)
711 JavaThread* jt = JavaThread::cast(thread);
712 // Must always be walkable or have no last_Java_frame when in
713 // thread_in_native
714 jt->frame_anchor()->make_walkable();
715 jt->set_thread_state(_thread_in_native);
716 }
717 }
718 notify_vm_shutdown();
719 }
720
721 void vm_shutdown()
722 {
723 vm_perform_shutdown_actions();
724 os::wait_for_keypress_at_exit();
725 os::shutdown();
726 }
727
728 void vm_abort(bool dump_core) {
729 vm_perform_shutdown_actions();
730 os::wait_for_keypress_at_exit();
731
732 // Flush stdout and stderr before abort.
733 fflush(stdout);
734 fflush(stderr);
735
736 os::abort(dump_core);
737 ShouldNotReachHere();
738 }
739
740 static void vm_notify_during_cds_dumping(const char* error, const char* message) {
741 if (error != nullptr) {
742 tty->print_cr("Error occurred during CDS dumping");
743 tty->print("%s", error);
744 if (message != nullptr) {
745 tty->print_cr(": %s", message);
746 }
747 else {
748 tty->cr();
749 }
750 }
751 }
752
753 void vm_exit_during_cds_dumping(const char* error, const char* message) {
754 vm_notify_during_cds_dumping(error, message);
755
756 // Failure during CDS dumping, we don't want to dump core
757 vm_abort(false);
758 }
759
760 static void vm_notify_during_shutdown(const char* error, const char* message) {
761 if (error != nullptr) {
762 tty->print_cr("Error occurred during initialization of VM");
763 tty->print("%s", error);
764 if (message != nullptr) {
765 tty->print_cr(": %s", message);
766 }
767 else {
768 tty->cr();
769 }
770 }
771 if (ShowMessageBoxOnError && WizardMode) {
772 fatal("Error occurred during initialization of VM");
773 }
774 }
775
776 void vm_exit_during_initialization() {
777 vm_notify_during_shutdown(nullptr, nullptr);
778
779 // Failure during initialization, we don't want to dump core
780 vm_abort(false);
781 }
782
783 void vm_exit_during_initialization(Handle exception) {
784 tty->print_cr("Error occurred during initialization of VM");
785 // If there are exceptions on this thread it must be cleared
786 // first and here. Any future calls to EXCEPTION_MARK requires
787 // that no pending exceptions exist.
788 JavaThread* THREAD = JavaThread::current(); // can't be null
789 if (HAS_PENDING_EXCEPTION) {
790 CLEAR_PENDING_EXCEPTION;
791 }
792 java_lang_Throwable::print_stack_trace(exception, tty);
793 tty->cr();
794 vm_notify_during_shutdown(nullptr, nullptr);
795
796 // Failure during initialization, we don't want to dump core
797 vm_abort(false);
798 }
799
800 void vm_exit_during_initialization(Symbol* ex, const char* message) {
801 ResourceMark rm;
802 vm_notify_during_shutdown(ex->as_C_string(), message);
803
804 // Failure during initialization, we don't want to dump core
805 vm_abort(false);
806 }
807
808 void vm_exit_during_initialization(const char* error, const char* message) {
809 vm_notify_during_shutdown(error, message);
810
811 // Failure during initialization, we don't want to dump core
812 vm_abort(false);
813 }
814
815 void vm_shutdown_during_initialization(const char* error, const char* message) {
816 vm_notify_during_shutdown(error, message);
817 vm_shutdown();
818 }
819
820 JDK_Version JDK_Version::_current;
821 const char* JDK_Version::_java_version;
822 const char* JDK_Version::_runtime_name;
823 const char* JDK_Version::_runtime_version;
824 const char* JDK_Version::_runtime_vendor_version;
825 const char* JDK_Version::_runtime_vendor_vm_bug_url;
826
827 void JDK_Version::initialize() {
828 assert(!_current.is_valid(), "Don't initialize twice");
829
830 int major = VM_Version::vm_major_version();
831 int minor = VM_Version::vm_minor_version();
832 int security = VM_Version::vm_security_version();
833 int build = VM_Version::vm_build_number();
834 int patch = VM_Version::vm_patch_version();
835 _current = JDK_Version(major, minor, security, patch, build);
836 }
837
838 void JDK_Version_init() {
839 JDK_Version::initialize();
840 }
841
842 static int64_t encode_jdk_version(const JDK_Version& v) {
843 return
844 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
845 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
846 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
847 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
848 ((int64_t)v.build_number() << (BitsPerByte * 0));
849 }
850
851 int JDK_Version::compare(const JDK_Version& other) const {
852 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
853 uint64_t e = encode_jdk_version(*this);
854 uint64_t o = encode_jdk_version(other);
855 return (e > o) ? 1 : ((e == o) ? 0 : -1);
856 }
857
858 /* See JEP 223 */
859 void JDK_Version::to_string(char* buffer, size_t buflen) const {
860 assert(buffer && buflen > 0, "call with useful buffer");
861 size_t index = 0;
862
863 if (!is_valid()) {
864 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
865 } else {
866 int rc = jio_snprintf(
867 &buffer[index], buflen - index, "%d.%d", _major, _minor);
868 if (rc == -1) return;
869 index += rc;
870 if (_patch > 0) {
871 rc = jio_snprintf(&buffer[index], buflen - index, ".%d.%d", _security, _patch);
872 if (rc == -1) return;
873 index += rc;
874 } else if (_security > 0) {
875 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
876 if (rc == -1) return;
877 index += rc;
878 }
879 if (_build > 0) {
880 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
881 if (rc == -1) return;
882 index += rc;
883 }
884 }
885 }