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/SCCache.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/statSampler.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/vmOperations.hpp"
89 #include "runtime/vmThread.hpp"
90 #include "runtime/vm_version.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 (SCCache::is_on_for_read()) {
215 log.print_cr("Startup Code Cache: ");
216 SCCache::print_statistics_on(&log);
217 log.cr();
218 SCCache::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 = " JLONG_FORMAT "]", 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 #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 (ReplayTraining && PrintTrainingInfo) {
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 (PrintSystemDictionaryAtExit) {
431 ResourceMark rm;
432 MutexLocker mcld(ClassLoaderDataGraph_lock);
433 SystemDictionary::print();
434 }
435
436 if (PrintClassLoaderDataGraphAtExit) {
437 ResourceMark rm;
438 MutexLocker mcld(ClassLoaderDataGraph_lock);
439 ClassLoaderDataGraph::print();
440 }
441
442 // Native memory tracking data
443 if (PrintNMTStatistics) {
444 MemTracker::final_report(tty);
445 }
446
447 if (PrintMetaspaceStatisticsAtExit) {
448 MetaspaceUtils::print_basic_report(tty, 0);
449 }
450
451 if (CompilerOracle::should_print_final_memstat_report()) {
452 CompilationMemoryStatistic::print_all_by_size(tty, false, 0);
453 }
454
455 ThreadsSMRSupport::log_statistics();
456
457 log_vm_init_stats();
458
459 if (log_is_enabled(Info, perf, class, link)) {
460 LogStreamHandle(Info, perf, class, link) log;
461 log.print_cr("At VM exit:");
462 ClassLoader::print_counters(&log);
463 }
464 }
465
466 // Note: before_exit() can be executed only once, if more than one threads
467 // are trying to shutdown the VM at the same time, only one thread
468 // can run before_exit() and all other threads must wait.
469 void before_exit(JavaThread* thread, bool halt) {
470 #define BEFORE_EXIT_NOT_RUN 0
471 #define BEFORE_EXIT_RUNNING 1
472 #define BEFORE_EXIT_DONE 2
473 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
474
475 Events::log(thread, "Before exit entered");
476
477 // Note: don't use a Mutex to guard the entire before_exit(), as
478 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
479 // A CAS or OSMutex would work just fine but then we need to manipulate
480 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
481 // for synchronization.
482 { MonitorLocker ml(BeforeExit_lock);
483 switch (_before_exit_status) {
484 case BEFORE_EXIT_NOT_RUN:
485 _before_exit_status = BEFORE_EXIT_RUNNING;
486 break;
487 case BEFORE_EXIT_RUNNING:
488 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
489 ml.wait();
490 }
491 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
492 return;
493 case BEFORE_EXIT_DONE:
494 // need block to avoid SS compiler bug
495 {
496 return;
497 }
498 }
499 }
500
501 // At this point only one thread is executing this logic. Any other threads
502 // attempting to invoke before_exit() will wait above and return early once
503 // this thread finishes before_exit().
504
505 // Do not add any additional shutdown logic between the above mutex logic and
506 // leak sanitizer logic below. Any additional shutdown code which performs some
507 // cleanup should be added after the leak sanitizer logic below.
508
509 #ifdef LEAK_SANITIZER
510 // If we are built with LSan, we need to perform leak checking. If we are
511 // terminating normally, not halting and no VM error, we perform a normal
512 // leak check which terminates if leaks are found. If we are not terminating
513 // normally, halting or VM error, we perform a recoverable leak check which
514 // prints leaks but will not terminate.
515 if (!halt && !VMError::is_error_reported()) {
516 LSAN_DO_LEAK_CHECK();
517 } else {
518 // Ignore the return value.
519 static_cast<void>(LSAN_DO_RECOVERABLE_LEAK_CHECK());
520 }
521 #endif
522
523 #if INCLUDE_CDS
524 MethodProfiler::process_method_hotness();
525 #endif
526
527 // Actual shutdown logic begins here.
528
529 #if INCLUDE_JVMCI
530 if (EnableJVMCI) {
531 JVMCI::shutdown(thread);
532 }
533 #endif
534
535 #if INCLUDE_CDS
536 ClassListWriter::write_resolved_constants();
537 ClassListWriter::write_reflection_data();
538 ClassListWriter::write_loader_negative_lookup_cache();
539 // Dynamic CDS dumping must happen whilst we can still reliably
540 // run Java code.
541 if (CDSConfig::is_dumping_preimage_static_archive()) {
542 // Creating the hotspot.cds.preimage file
543 MetaspaceShared::preload_and_dump(thread);
544 } else {
545 DynamicArchive::dump_at_exit(thread, ArchiveClassesAtExit);
546 }
547 assert(!thread->has_pending_exception(), "must be");
548 #endif
549
550 SCCache::close(); // Write final data and close archive
551
552 // Hang forever on exit if we're reporting an error.
553 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
554 os::infinite_sleep();
555 }
556
557 EventThreadEnd event;
558 if (event.should_commit()) {
559 event.set_thread(JFR_JVM_THREAD_ID(thread));
560 event.commit();
561 }
562
563 JFR_ONLY(Jfr::on_vm_shutdown(false, halt);)
564
565 // Stop the WatcherThread. We do this before disenrolling various
566 // PeriodicTasks to reduce the likelihood of races.
567 WatcherThread::stop();
568
569 // shut down the StatSampler task
570 StatSampler::disengage();
571 StatSampler::destroy();
572
573 NativeHeapTrimmer::cleanup();
574
575 // Stop concurrent GC threads
576 Universe::heap()->stop();
577
578 // Print GC/heap related information.
579 Log(gc, heap, exit) log;
580 if (log.is_info()) {
581 ResourceMark rm;
582 LogStream ls_info(log.info());
583 Universe::print_on(&ls_info);
584 if (log.is_trace()) {
585 LogStream ls_trace(log.trace());
586 MutexLocker mcld(ClassLoaderDataGraph_lock);
587 ClassLoaderDataGraph::print_on(&ls_trace);
588 }
589 }
590
591 if (PrintBytecodeHistogram) {
592 BytecodeHistogram::print(PrintBytecodeHistogramCutoff);
593 }
594
595 #ifdef LINUX
596 if (DumpPerfMapAtExit) {
597 CodeCache::write_perf_map(nullptr, tty);
598 }
599 if (PrintMemoryMapAtExit) {
600 MemMapPrinter::print_all_mappings(tty);
601 }
602 #endif
603
604 if (JvmtiExport::should_post_thread_life()) {
605 JvmtiExport::post_thread_end(thread);
606 }
607
608 // Always call even when there are not JVMTI environments yet, since environments
609 // may be attached late and JVMTI must track phases of VM execution
610 JvmtiExport::post_vm_death();
611 JvmtiAgentList::unload_agents();
612
613 // Terminate the signal thread
614 // Note: we don't wait until it actually dies.
615 os::terminate_signal_thread();
616
617 if (VerifyTrainingData) {
618 EXCEPTION_MARK;
619 CompilationPolicy::flush_replay_training_at_init(THREAD);
620 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=%zu", 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 }