1 /*
2 * Copyright (c) 1997, 2025, 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/cds_globals.hpp"
27 #include "cds/cdsConfig.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/dynamicArchive.hpp"
30 #include "cds/methodProfiler.hpp"
31 #include "cds/metaspaceShared.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/codeCache.hpp"
39 #include "code/aotCodeCache.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/sharedRuntime.hpp"
82 #include "runtime/stubRoutines.hpp"
83 #include "runtime/task.hpp"
84 #include "runtime/threads.hpp"
85 #include "runtime/timer.hpp"
86 #include "runtime/trimNativeHeap.hpp"
87 #include "runtime/vmOperations.hpp"
88 #include "runtime/vmThread.hpp"
89 #include "runtime/vm_version.hpp"
90 #include "sanitizers/leak.hpp"
91 #include "utilities/dtrace.hpp"
92 #include "utilities/events.hpp"
93 #include "utilities/globalDefinitions.hpp"
94 #include "utilities/macros.hpp"
95 #include "utilities/vmError.hpp"
96 #ifdef COMPILER1
97 #include "c1/c1_Compiler.hpp"
98 #include "c1/c1_Runtime1.hpp"
99 #endif
100 #ifdef COMPILER2
101 #include "code/compiledIC.hpp"
102 #include "opto/compile.hpp"
103 #include "opto/indexSet.hpp"
104 #include "opto/runtime.hpp"
105 #endif
106 #if INCLUDE_JFR
107 #include "jfr/jfr.hpp"
108 #endif
109 #if INCLUDE_JVMCI
110 #include "jvmci/jvmci.hpp"
111 #endif
112
113 GrowableArray<Method*>* collected_profiled_methods;
114
115 static int compare_methods(Method** a, Method** b) {
116 // compiled_invocation_count() returns int64_t, forcing the entire expression
117 // to be evaluated as int64_t. Overflow is not an issue.
118 int64_t diff = (((*b)->invocation_count() + (*b)->compiled_invocation_count())
119 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()));
120 return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
121 }
122
123 static void collect_profiled_methods(Method* m) {
124 Thread* thread = Thread::current();
125 methodHandle mh(thread, m);
126 if ((m->method_data() != nullptr) &&
127 (PrintMethodData || CompilerOracle::should_print(mh))) {
128 collected_profiled_methods->push(m);
129 }
130 }
131
132 static void print_method_profiling_data() {
133 if ((ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) &&
134 (PrintMethodData || CompilerOracle::should_print_methods())) {
135 ResourceMark rm;
136 collected_profiled_methods = new GrowableArray<Method*>(1024);
137 SystemDictionary::methods_do(collect_profiled_methods);
138 collected_profiled_methods->sort(&compare_methods);
139
140 int count = collected_profiled_methods->length();
141 int total_size = 0;
142 if (count > 0) {
143 for (int index = 0; index < count; index++) {
144 Method* m = collected_profiled_methods->at(index);
145
146 // Instead of taking tty lock, we collect all lines into a string stream
147 // and then print them all at once.
148 ResourceMark rm2;
149 stringStream ss;
150
151 ss.print_cr("------------------------------------------------------------------------");
152 m->print_invocation_count(&ss);
153 ss.print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
154 ss.cr();
155 // Dump data on parameters if any
156 if (m->method_data() != nullptr && m->method_data()->parameters_type_data() != nullptr) {
157 ss.fill_to(2);
158 m->method_data()->parameters_type_data()->print_data_on(&ss);
159 }
160 m->print_codes_on(&ss);
161 tty->print("%s", ss.as_string()); // print all at once
162 total_size += m->method_data()->size_in_bytes();
163 }
164 tty->print_cr("------------------------------------------------------------------------");
165 tty->print_cr("Total MDO size: %d bytes", total_size);
166 }
167 }
168 }
169
170 void perf_jvm_print_on(outputStream* st);
171
172 void log_vm_init_stats() {
173 LogStreamHandle(Info, init) log;
174 if (log.is_enabled()) {
175 SharedRuntime::print_counters_on(&log);
176 ClassLoader::print_counters(&log);
177 AOTLinkedClassBulkLoader::print_counters_on(&log);
178 log.cr();
179 // FIXME: intermittent crashes
180 // if (CountBytecodesPerThread) {
181 // log.print_cr("Thread info:");
182 // class PrintThreadInfo : public ThreadClosure {
183 // outputStream* _st;
184 // public:
185 // PrintThreadInfo(outputStream* st) : ThreadClosure(), _st(st) {}
186 // void do_thread(Thread* thread) {
187 // JavaThread* jt = JavaThread::cast(thread);
188 // if (jt->bc_counter_value() > 0) {
189 // _st->print_cr(" Thread " INTPTR_FORMAT ": %ld bytecodes executed (clinit: %ld)",
190 // p2i(jt), /*jt->name(),*/ jt->bc_counter_value(), jt->clinit_bc_counter_value());
191 // }
192 // }
193 // };
194 // PrintThreadInfo cl(&log);
195 // Threads::java_threads_do(&cl);
196 // }
197 // log.cr();
198 log.print_cr("Deoptimization events: ");
199 Deoptimization::print_statistics_on(&log);
200 log.cr();
201
202 log.print("Compilation statistics: ");
203 CompileBroker::print_statistics_on(&log);
204 log.cr();
205
206 {
207 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
208 log.print("Code cache statistics: ");
209 CodeCache::print_nmethod_statistics_on(&log);
210 log.cr();
211 }
212
213 if (AOTCodeCache::is_on_for_use()) {
214 log.print_cr("Startup Code Cache: ");
215 AOTCodeCache::print_statistics_on(&log);
216 log.cr();
217 AOTCodeCache::print_timers_on(&log);
218 }
219
220 VMThread::print_counters_on(&log);
221 log.cr();
222 MutexLockerImpl::print_counters_on(&log);
223 log.cr();
224 log.print("Runtime events for thread \"main\"");
225 if (ProfileRuntimeCalls) {
226 log.print_cr(" (%d nested events):", ProfileVMCallContext::nested_runtime_calls_count());
227
228 InterpreterRuntime::print_counters_on(&log);
229 #ifdef COMPILER1
230 Runtime1::print_counters_on(&log);
231 #endif
232 #ifdef COMPILER2
233 OptoRuntime::print_counters_on(&log);
234 Deoptimization::print_counters_on(&log);
235 #endif
236 } else {
237 log.print_cr(": no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
238 }
239 log.cr();
240 perf_jvm_print_on(&log);
241 log.cr();
242 MethodHandles::print_counters_on(&log);
243 }
244 }
245
246 void print_bytecode_count() {
247 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
248 tty->print_cr("[BytecodeCounter::counter_value = %zu]", BytecodeCounter::counter_value());
249 }
250 }
251
252 #ifndef PRODUCT
253
254 // Statistics printing (method invocation histogram)
255
256 GrowableArray<Method*>* collected_invoked_methods;
257
258 static void collect_invoked_methods(Method* m) {
259 if (m->invocation_count() + m->compiled_invocation_count() >= 1) {
260 collected_invoked_methods->push(m);
261 }
262 }
263
264
265 // Invocation count accumulators should be unsigned long to shift the
266 // overflow border. Longer-running workloads tend to create invocation
267 // counts which already overflow 32-bit counters for individual methods.
268 static void print_method_invocation_histogram() {
269 ResourceMark rm;
270 collected_invoked_methods = new GrowableArray<Method*>(1024);
271 SystemDictionary::methods_do(collect_invoked_methods);
272 collected_invoked_methods->sort(&compare_methods);
273 //
274 tty->cr();
275 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = %zd):", MethodHistogramCutoff);
276 tty->cr();
277 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
278 uint64_t total = 0,
279 int_total = 0,
280 comp_total = 0,
281 special_total= 0,
282 static_total = 0,
283 final_total = 0,
284 synch_total = 0,
285 native_total = 0,
286 access_total = 0;
287 for (int index = 0; index < collected_invoked_methods->length(); index++) {
288 // Counter values returned from getter methods are signed int.
289 // To shift the overflow border by a factor of two, we interpret
290 // them here as unsigned long. A counter can't be negative anyway.
291 Method* m = collected_invoked_methods->at(index);
292 uint64_t iic = (uint64_t)m->invocation_count();
293 uint64_t cic = (uint64_t)m->compiled_invocation_count();
294 if ((iic + cic) >= (uint64_t)MethodHistogramCutoff) m->print_invocation_count(tty);
295 int_total += iic;
296 comp_total += cic;
297 if (m->is_final()) final_total += iic + cic;
298 if (m->is_static()) static_total += iic + cic;
299 if (m->is_synchronized()) synch_total += iic + cic;
300 if (m->is_native()) native_total += iic + cic;
301 if (m->is_accessor()) access_total += iic + cic;
302 }
303 tty->cr();
304 total = int_total + comp_total;
305 special_total = final_total + static_total +synch_total + native_total + access_total;
306 tty->print_cr("Invocations summary for %d methods:", collected_invoked_methods->length());
307 double total_div = (double)total;
308 tty->print_cr("\t" UINT64_FORMAT_W(12) " (100%%) total", total);
309 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- interpreted", int_total, 100.0 * (double)int_total / total_div);
310 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- compiled", comp_total, 100.0 * (double)comp_total / total_div);
311 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- special methods (interpreted and compiled)",
312 special_total, 100.0 * (double)special_total/ total_div);
313 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- synchronized",synch_total, 100.0 * (double)synch_total / total_div);
314 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- final", final_total, 100.0 * (double)final_total / total_div);
315 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- static", static_total, 100.0 * (double)static_total / total_div);
316 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- native", native_total, 100.0 * (double)native_total / total_div);
317 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- accessor", access_total, 100.0 * (double)access_total / total_div);
318 tty->cr();
319 SharedRuntime::print_call_statistics_on(tty);
320
321 }
322
323 #else
324
325 static void print_method_invocation_histogram() {}
326
327 #endif // PRODUCT
328
329
330 // General statistics printing (profiling ...)
331 void print_statistics() {
332 #if INCLUDE_CDS
333 if (AOTReplayTraining && AOTPrintTrainingInfo) {
334 TrainingData::print_archived_training_data_on(tty);
335 }
336 #endif
337 if (CITime) {
338 CompileBroker::print_times();
339 }
340
341 #ifdef COMPILER1
342 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
343 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
344 Runtime1::print_statistics_on(tty);
345 SharedRuntime::print_statistics();
346 }
347 #endif /* COMPILER1 */
348
349 #ifdef COMPILER2
350 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
351 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
352 Compile::print_statistics();
353 Deoptimization::print_statistics();
354 #ifndef COMPILER1
355 SharedRuntime::print_statistics();
356 #endif //COMPILER1
357 }
358
359 if (PrintLockStatistics) {
360 OptoRuntime::print_named_counters();
361 }
362 #ifdef ASSERT
363 if (CollectIndexSetStatistics) {
364 IndexSet::print_statistics();
365 }
366 #endif // ASSERT
367 #else // COMPILER2
368 #if INCLUDE_JVMCI
369 #ifndef COMPILER1
370 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
371 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
372 Deoptimization::print_statistics();
373 SharedRuntime::print_statistics();
374 }
375 #endif // COMPILER1
376 #endif // INCLUDE_JVMCI
377 #endif // COMPILER2
378
379 if (PrintNMethodStatistics) {
380 nmethod::print_statistics();
381 }
382 if (CountCompiledCalls) {
383 print_method_invocation_histogram();
384 }
385
386 print_method_profiling_data();
387
388 if (TimeOopMap) {
389 GenerateOopMap::print_time();
390 }
391 if (PrintSymbolTableSizeHistogram) {
392 SymbolTable::print_histogram();
393 }
394 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
395 BytecodeCounter::print();
396 }
397 if (PrintBytecodePairHistogram) {
398 BytecodePairHistogram::print();
399 }
400
401 if (PrintCodeCache) {
402 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
403 CodeCache::print();
404 }
405
406 // CodeHeap State Analytics.
407 if (PrintCodeHeapAnalytics) {
408 CompileBroker::print_heapinfo(nullptr, "all", 4096); // details
409 }
410
411 LogStreamHandle(Debug, codecache, nmethod) log;
412 if (log.is_enabled()) {
413 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
414 CodeCache::print_nmethods_on(&log);
415 }
416
417 #ifndef PRODUCT
418 if (PrintCodeCache2) {
419 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
420 CodeCache::print_internals();
421 }
422 #endif
423
424 if (VerifyOops && Verbose) {
425 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
426 }
427
428 print_bytecode_count();
429
430 if (PrintVMInfoAtExit) {
431 // Use an intermediate stream to prevent deadlocking on tty_lock
432 stringStream ss;
433 VMError::print_vm_info(&ss);
434 tty->print_raw(ss.base());
435 }
436
437 if (PrintSystemDictionaryAtExit) {
438 ResourceMark rm;
439 MutexLocker mcld(ClassLoaderDataGraph_lock);
440 SystemDictionary::print();
441 }
442
443 if (PrintClassLoaderDataGraphAtExit) {
444 ResourceMark rm;
445 MutexLocker mcld(ClassLoaderDataGraph_lock);
446 ClassLoaderDataGraph::print();
447 }
448
449 // Native memory tracking data
450 if (PrintNMTStatistics) {
451 MemTracker::final_report(tty);
452 }
453
454 if (PrintMetaspaceStatisticsAtExit) {
455 MetaspaceUtils::print_basic_report(tty, 0);
456 }
457
458 if (PrintCompilerMemoryStatisticsAtExit) {
459 CompilationMemoryStatistic::print_final_report(tty);
460 }
461
462 ThreadsSMRSupport::log_statistics();
463
464 log_vm_init_stats();
465
466 if (log_is_enabled(Info, perf, class, link)) {
467 LogStreamHandle(Info, perf, class, link) log;
468 log.print_cr("At VM exit:");
469 ClassLoader::print_counters(&log);
470 }
471 }
472
473 // Note: before_exit() can be executed only once, if more than one threads
474 // are trying to shutdown the VM at the same time, only one thread
475 // can run before_exit() and all other threads must wait.
476 void before_exit(JavaThread* thread, bool halt) {
477 #define BEFORE_EXIT_NOT_RUN 0
478 #define BEFORE_EXIT_RUNNING 1
479 #define BEFORE_EXIT_DONE 2
480 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
481
482 Events::log(thread, "Before exit entered");
483
484 // Note: don't use a Mutex to guard the entire before_exit(), as
485 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
486 // A CAS or OSMutex would work just fine but then we need to manipulate
487 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
488 // for synchronization.
489 { MonitorLocker ml(BeforeExit_lock);
490 switch (_before_exit_status) {
491 case BEFORE_EXIT_NOT_RUN:
492 _before_exit_status = BEFORE_EXIT_RUNNING;
493 break;
494 case BEFORE_EXIT_RUNNING:
495 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
496 ml.wait();
497 }
498 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
499 return;
500 case BEFORE_EXIT_DONE:
501 // need block to avoid SS compiler bug
502 {
503 return;
504 }
505 }
506 }
507
508 // At this point only one thread is executing this logic. Any other threads
509 // attempting to invoke before_exit() will wait above and return early once
510 // this thread finishes before_exit().
511
512 // Do not add any additional shutdown logic between the above mutex logic and
513 // leak sanitizer logic below. Any additional shutdown code which performs some
514 // cleanup should be added after the leak sanitizer logic below.
515
516 #ifdef LEAK_SANITIZER
517 // If we are built with LSan, we need to perform leak checking. If we are
518 // terminating normally, not halting and no VM error, we perform a normal
519 // leak check which terminates if leaks are found. If we are not terminating
520 // normally, halting or VM error, we perform a recoverable leak check which
521 // prints leaks but will not terminate.
522 if (!halt && !VMError::is_error_reported()) {
523 LSAN_DO_LEAK_CHECK();
524 } else {
525 // Ignore the return value.
526 static_cast<void>(LSAN_DO_RECOVERABLE_LEAK_CHECK());
527 }
528 #endif
529
530 #if INCLUDE_CDS
531 MethodProfiler::process_method_hotness();
532 // Dynamic CDS dumping must happen whilst we can still reliably
533 // run Java code.
534 DynamicArchive::dump_at_exit(thread);
535 assert(!thread->has_pending_exception(), "must be");
536 #endif
537
538 // Actual shutdown logic begins here.
539
540 #if INCLUDE_JVMCI
541 if (EnableJVMCI) {
542 JVMCI::shutdown(thread);
543 }
544 #endif
545
546 #if INCLUDE_CDS
547 ClassListWriter::write_resolved_constants();
548 ClassListWriter::write_reflection_data();
549 ClassListWriter::write_loader_negative_lookup_cache();
550 if (CDSConfig::is_dumping_preimage_static_archive()) {
551 // Creating the hotspot.cds.preimage file
552 MetaspaceShared::preload_and_dump(thread);
553 assert(!thread->has_pending_exception(), "must be");
554 }
555 #endif
556
557 AOTCodeCache::close(); // Write final data and close archive
558
559 // Hang forever on exit if we're reporting an error.
560 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
561 os::infinite_sleep();
562 }
563
564 EventThreadEnd event;
565 if (event.should_commit()) {
566 event.set_thread(JFR_JVM_THREAD_ID(thread));
567 event.commit();
568 }
569
570 JFR_ONLY(Jfr::on_vm_shutdown(false, halt);)
571
572 // Stop the WatcherThread. We do this before disenrolling various
573 // PeriodicTasks to reduce the likelihood of races.
574 WatcherThread::stop();
575
576 NativeHeapTrimmer::cleanup();
577
578 // Stop concurrent GC threads
579 Universe::heap()->stop();
580
581 // Print GC/heap related information.
582 Log(gc, exit) log;
583 if (log.is_info()) {
584 LogStream ls_info(log.info());
585 Universe::print_on(&ls_info);
586 if (log.is_trace()) {
587 LogStream ls_trace(log.trace());
588 MutexLocker mcld(ClassLoaderDataGraph_lock);
589 ClassLoaderDataGraph::print_on(&ls_trace);
590 }
591 }
592
593 if (PrintBytecodeHistogram) {
594 BytecodeHistogram::print(PrintBytecodeHistogramCutoff);
595 }
596
597 #ifdef LINUX
598 if (DumpPerfMapAtExit) {
599 CodeCache::write_perf_map(nullptr, tty);
600 }
601 if (PrintMemoryMapAtExit) {
602 MemMapPrinter::print_all_mappings(tty);
603 }
604 #endif
605
606 if (JvmtiExport::should_post_thread_life()) {
607 JvmtiExport::post_thread_end(thread);
608 }
609
610 // Always call even when there are not JVMTI environments yet, since environments
611 // may be attached late and JVMTI must track phases of VM execution
612 JvmtiExport::post_vm_death();
613 JvmtiAgentList::unload_agents();
614
615 // Terminate the signal thread
616 // Note: we don't wait until it actually dies.
617 os::terminate_signal_thread();
618
619 if (AOTVerifyTrainingData) {
620 EXCEPTION_MARK;
621 CompilationPolicy::flush_replay_training_at_init(THREAD);
622 TrainingData::verify();
623 }
624
625 print_statistics();
626 Universe::heap()->print_tracing_info();
627
628 { MutexLocker ml(BeforeExit_lock);
629 _before_exit_status = BEFORE_EXIT_DONE;
630 BeforeExit_lock->notify_all();
631 }
632
633 if (VerifyStringTableAtExit) {
634 size_t fail_cnt = StringTable::verify_and_compare_entries();
635 if (fail_cnt != 0) {
636 tty->print_cr("ERROR: fail_cnt=%zu", fail_cnt);
637 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
638 }
639 }
640
641 #undef BEFORE_EXIT_NOT_RUN
642 #undef BEFORE_EXIT_RUNNING
643 #undef BEFORE_EXIT_DONE
644 }
645
646 void vm_exit(int code) {
647 Thread* thread =
648 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : nullptr;
649 if (thread == nullptr) {
650 // very early initialization failure -- just exit
651 vm_direct_exit(code);
652 }
653
654 // We'd like to add an entry to the XML log to show that the VM is
655 // terminating, but we can't safely do that here. The logic to make
656 // XML termination logging safe is tied to the termination of the
657 // VMThread, and it doesn't terminate on this exit path. See 8222534.
658
659 if (VMThread::vm_thread() != nullptr) {
660 if (thread->is_Java_thread()) {
661 // We must be "in_vm" for the code below to work correctly.
662 // Historically there must have been some exit path for which
663 // that was not the case and so we set it explicitly - even
664 // though we no longer know what that path may be.
665 JavaThread::cast(thread)->set_thread_state(_thread_in_vm);
666 }
667
668 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
669 VM_Exit op(code);
670
671 // 4945125 The vm thread comes to a safepoint during exit.
672 // GC vm_operations can get caught at the safepoint, and the
673 // heap is unparseable if they are caught. Grab the Heap_lock
674 // to prevent this. The GC vm_operations will not be able to
675 // queue until after we release it, but we never do that as we
676 // are terminating the VM process.
677 MutexLocker ml(Heap_lock);
678
679 VMThread::execute(&op);
680 // should never reach here; but in case something wrong with VM Thread.
681 vm_direct_exit(code);
682 } else {
683 // VM thread is gone, just exit
684 vm_direct_exit(code);
685 }
686 ShouldNotReachHere();
687 }
688
689 void notify_vm_shutdown() {
690 // For now, just a dtrace probe.
691 HOTSPOT_VM_SHUTDOWN();
692 }
693
694 void vm_direct_exit(int code) {
695 notify_vm_shutdown();
696 os::wait_for_keypress_at_exit();
697 os::exit(code);
698 }
699
700 void vm_direct_exit(int code, const char* message) {
701 if (message != nullptr) {
702 tty->print_cr("%s", message);
703 }
704 vm_direct_exit(code);
705 }
706
707 static void vm_perform_shutdown_actions() {
708 if (is_init_completed()) {
709 Thread* thread = Thread::current_or_null();
710 if (thread != nullptr && thread->is_Java_thread()) {
711 // We are leaving the VM, set state to native (in case any OS exit
712 // handlers call back to the VM)
713 JavaThread* jt = JavaThread::cast(thread);
714 // Must always be walkable or have no last_Java_frame when in
715 // thread_in_native
716 jt->frame_anchor()->make_walkable();
717 jt->set_thread_state(_thread_in_native);
718 }
719 }
720 notify_vm_shutdown();
721 }
722
723 void vm_shutdown()
724 {
725 vm_perform_shutdown_actions();
726 os::wait_for_keypress_at_exit();
727 os::shutdown();
728 }
729
730 void vm_abort(bool dump_core) {
731 vm_perform_shutdown_actions();
732 os::wait_for_keypress_at_exit();
733
734 // Flush stdout and stderr before abort.
735 fflush(stdout);
736 fflush(stderr);
737
738 os::abort(dump_core);
739 ShouldNotReachHere();
740 }
741
742 static void vm_notify_during_cds_dumping(const char* error, const char* message) {
743 if (error != nullptr) {
744 tty->print_cr("Error occurred during CDS dumping");
745 tty->print("%s", error);
746 if (message != nullptr) {
747 tty->print_cr(": %s", message);
748 }
749 else {
750 tty->cr();
751 }
752 }
753 }
754
755 void vm_exit_during_cds_dumping(const char* error, const char* message) {
756 vm_notify_during_cds_dumping(error, message);
757
758 // Failure during CDS dumping, we don't want to dump core
759 vm_abort(false);
760 }
761
762 static void vm_notify_during_shutdown(const char* error, const char* message) {
763 if (error != nullptr) {
764 tty->print_cr("Error occurred during initialization of VM");
765 tty->print("%s", error);
766 if (message != nullptr) {
767 tty->print_cr(": %s", message);
768 }
769 else {
770 tty->cr();
771 }
772 }
773 if (ShowMessageBoxOnError && WizardMode) {
774 fatal("Error occurred during initialization of VM");
775 }
776 }
777
778 void vm_exit_during_initialization() {
779 vm_notify_during_shutdown(nullptr, nullptr);
780
781 // Failure during initialization, we don't want to dump core
782 vm_abort(false);
783 }
784
785 void vm_exit_during_initialization(Handle exception) {
786 tty->print_cr("Error occurred during initialization of VM");
787 // If there are exceptions on this thread it must be cleared
788 // first and here. Any future calls to EXCEPTION_MARK requires
789 // that no pending exceptions exist.
790 JavaThread* THREAD = JavaThread::current(); // can't be null
791 if (HAS_PENDING_EXCEPTION) {
792 CLEAR_PENDING_EXCEPTION;
793 }
794 java_lang_Throwable::print_stack_trace(exception, tty);
795 tty->cr();
796 vm_notify_during_shutdown(nullptr, nullptr);
797
798 // Failure during initialization, we don't want to dump core
799 vm_abort(false);
800 }
801
802 void vm_exit_during_initialization(Symbol* ex, const char* message) {
803 ResourceMark rm;
804 vm_notify_during_shutdown(ex->as_C_string(), message);
805
806 // Failure during initialization, we don't want to dump core
807 vm_abort(false);
808 }
809
810 void vm_exit_during_initialization(const char* error, const char* message) {
811 vm_notify_during_shutdown(error, message);
812
813 // Failure during initialization, we don't want to dump core
814 vm_abort(false);
815 }
816
817 void vm_shutdown_during_initialization(const char* error, const char* message) {
818 vm_notify_during_shutdown(error, message);
819 vm_shutdown();
820 }
821
822 JDK_Version JDK_Version::_current;
823 const char* JDK_Version::_java_version;
824 const char* JDK_Version::_runtime_name;
825 const char* JDK_Version::_runtime_version;
826 const char* JDK_Version::_runtime_vendor_version;
827 const char* JDK_Version::_runtime_vendor_vm_bug_url;
828
829 void JDK_Version::initialize() {
830 assert(!_current.is_valid(), "Don't initialize twice");
831
832 int major = VM_Version::vm_major_version();
833 int minor = VM_Version::vm_minor_version();
834 int security = VM_Version::vm_security_version();
835 int build = VM_Version::vm_build_number();
836 int patch = VM_Version::vm_patch_version();
837 _current = JDK_Version(major, minor, security, patch, build);
838 }
839
840 void JDK_Version_init() {
841 JDK_Version::initialize();
842 }
843
844 static int64_t encode_jdk_version(const JDK_Version& v) {
845 return
846 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
847 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
848 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
849 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
850 ((int64_t)v.build_number() << (BitsPerByte * 0));
851 }
852
853 int JDK_Version::compare(const JDK_Version& other) const {
854 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
855 uint64_t e = encode_jdk_version(*this);
856 uint64_t o = encode_jdk_version(other);
857 return (e > o) ? 1 : ((e == o) ? 0 : -1);
858 }
859
860 /* See JEP 223 */
861 void JDK_Version::to_string(char* buffer, size_t buflen) const {
862 assert(buffer && buflen > 0, "call with useful buffer");
863 size_t index = 0;
864
865 if (!is_valid()) {
866 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
867 } else {
868 int rc = jio_snprintf(
869 &buffer[index], buflen - index, "%d.%d", _major, _minor);
870 if (rc == -1) return;
871 index += rc;
872 if (_patch > 0) {
873 rc = jio_snprintf(&buffer[index], buflen - index, ".%d.%d", _security, _patch);
874 if (rc == -1) return;
875 index += rc;
876 } else if (_security > 0) {
877 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
878 if (rc == -1) return;
879 index += rc;
880 }
881 if (_build > 0) {
882 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
883 if (rc == -1) return;
884 index += rc;
885 }
886 }
887 }