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(bool use_tty) {
175 LogStreamHandle(Info, init) log;
176 if (log.is_enabled()) {
177 outputStream* out = use_tty ? tty : &log;
178 SharedRuntime::print_counters_on(out);
179 LogStreamHandle(Info, perf, class, link) log2;
180 outputStream* out2 = use_tty ? tty : &log2;
181 ClassLoader::print_counters(out2);
182 AOTLinkedClassBulkLoader::print_counters();
183 out->cr();
184 // FIXME: intermittent crashes
185 // if (CountBytecodesPerThread) {
186 // log.print_cr("Thread info:");
187 // class PrintThreadInfo : public ThreadClosure {
188 // outputStream* _st;
189 // public:
190 // PrintThreadInfo(outputStream* st) : ThreadClosure(), _st(st) {}
191 // void do_thread(Thread* thread) {
192 // JavaThread* jt = JavaThread::cast(thread);
193 // if (jt->bc_counter_value() > 0) {
194 // _st->print_cr(" Thread " INTPTR_FORMAT ": %ld bytecodes executed (clinit: %ld)",
195 // p2i(jt), /*jt->name(),*/ jt->bc_counter_value(), jt->clinit_bc_counter_value());
196 // }
197 // }
198 // };
199 // PrintThreadInfo cl(&log);
200 // Threads::java_threads_do(&cl);
201 // }
202 // log.cr();
203 out->print_cr("Deoptimization events: ");
204 Deoptimization::print_statistics_on(out);
205 out->cr();
206
207 out->print("Compilation statistics: ");
208 CompileBroker::print_statistics_on(out);
209 out->cr();
210
211 {
212 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
213 out->print("Code cache statistics: ");
214 CodeCache::print_nmethod_statistics_on(out);
215 out->cr();
216 }
217
218 if (SCCache::is_on_for_read()) {
219 out->print_cr("Startup Code Cache: ");
220 SCCache::print_statistics_on(out);
221 out->cr();
222 SCCache::print_timers_on(out);
223 }
224
225 VMThread::print_counters_on(out);
226 out->cr();
227 MutexLockerImpl::print_counters_on(out);
228 out->cr();
229 out->print("Runtime events for thread \"main\"");
230 if (ProfileRuntimeCalls) {
231 out->print_cr(" (%d nested events):", ProfileVMCallContext::nested_runtime_calls_count());
232
233 InterpreterRuntime::print_counters_on(out);
234 #ifdef COMPILER1
235 Runtime1::print_counters_on(out);
236 #endif
237 #ifdef COMPILER2
238 OptoRuntime::print_counters_on(out);
239 Deoptimization::print_counters_on(out);
240 #endif
241 } else {
242 out->print_cr(": no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
243 }
244 out->cr();
245 perf_jvm_print_on(out);
246 out->cr();
247 MethodHandles::print_counters_on(out);
248 }
249 }
250
251 void print_bytecode_count() {
252 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
253 tty->print_cr("[BytecodeCounter::counter_value = " JLONG_FORMAT "]", BytecodeCounter::counter_value());
254 }
255 }
256
257 #ifndef PRODUCT
258
259 // Statistics printing (method invocation histogram)
260
261 GrowableArray<Method*>* collected_invoked_methods;
262
263 static void collect_invoked_methods(Method* m) {
264 if (m->invocation_count() + m->compiled_invocation_count() >= 1) {
265 collected_invoked_methods->push(m);
266 }
267 }
268
269
270 // Invocation count accumulators should be unsigned long to shift the
271 // overflow border. Longer-running workloads tend to create invocation
272 // counts which already overflow 32-bit counters for individual methods.
273 static void print_method_invocation_histogram() {
274 ResourceMark rm;
275 collected_invoked_methods = new GrowableArray<Method*>(1024);
276 SystemDictionary::methods_do(collect_invoked_methods);
277 collected_invoked_methods->sort(&compare_methods);
278 //
279 tty->cr();
280 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
281 tty->cr();
282 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
283 uint64_t total = 0,
284 int_total = 0,
285 comp_total = 0,
286 special_total= 0,
287 static_total = 0,
288 final_total = 0,
289 synch_total = 0,
290 native_total = 0,
291 access_total = 0;
292 for (int index = 0; index < collected_invoked_methods->length(); index++) {
293 // Counter values returned from getter methods are signed int.
294 // To shift the overflow border by a factor of two, we interpret
295 // them here as unsigned long. A counter can't be negative anyway.
296 Method* m = collected_invoked_methods->at(index);
297 uint64_t iic = (uint64_t)m->invocation_count();
298 uint64_t cic = (uint64_t)m->compiled_invocation_count();
299 if ((iic + cic) >= (uint64_t)MethodHistogramCutoff) m->print_invocation_count(tty);
300 int_total += iic;
301 comp_total += cic;
302 if (m->is_final()) final_total += iic + cic;
303 if (m->is_static()) static_total += iic + cic;
304 if (m->is_synchronized()) synch_total += iic + cic;
305 if (m->is_native()) native_total += iic + cic;
306 if (m->is_accessor()) access_total += iic + cic;
307 }
308 tty->cr();
309 total = int_total + comp_total;
310 special_total = final_total + static_total +synch_total + native_total + access_total;
311 tty->print_cr("Invocations summary for %d methods:", collected_invoked_methods->length());
312 double total_div = (double)total;
313 tty->print_cr("\t" UINT64_FORMAT_W(12) " (100%%) total", total);
314 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- interpreted", int_total, 100.0 * (double)int_total / total_div);
315 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- compiled", comp_total, 100.0 * (double)comp_total / total_div);
316 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- special methods (interpreted and compiled)",
317 special_total, 100.0 * (double)special_total/ total_div);
318 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- synchronized",synch_total, 100.0 * (double)synch_total / total_div);
319 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- final", final_total, 100.0 * (double)final_total / total_div);
320 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- static", static_total, 100.0 * (double)static_total / total_div);
321 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- native", native_total, 100.0 * (double)native_total / total_div);
322 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- accessor", access_total, 100.0 * (double)access_total / total_div);
323 tty->cr();
324 SharedRuntime::print_call_statistics_on(tty);
325 }
326
327 #else
328
329 static void print_method_invocation_histogram() {}
330
331 #endif // PRODUCT
332
333
334 // General statistics printing (profiling ...)
335 void print_statistics() {
336 #if INCLUDE_CDS
337 if (ReplayTraining && PrintTrainingInfo) {
338 TrainingData::print_archived_training_data_on(tty);
339 }
340 #endif
341 if (CITime) {
342 CompileBroker::print_times();
343 }
344
345 #ifdef COMPILER1
346 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
347 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
348 Runtime1::print_statistics_on(tty);
349 SharedRuntime::print_statistics();
350 }
351 #endif /* COMPILER1 */
352
353 #ifdef COMPILER2
354 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
355 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
356 Compile::print_statistics();
357 Deoptimization::print_statistics();
358 #ifndef COMPILER1
359 SharedRuntime::print_statistics();
360 #endif //COMPILER1
361 }
362
363 if (PrintLockStatistics) {
364 OptoRuntime::print_named_counters();
365 }
366 #ifdef ASSERT
367 if (CollectIndexSetStatistics) {
368 IndexSet::print_statistics();
369 }
370 #endif // ASSERT
371 #else // COMPILER2
372 #if INCLUDE_JVMCI
373 #ifndef COMPILER1
374 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
375 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
376 Deoptimization::print_statistics();
377 SharedRuntime::print_statistics();
378 }
379 #endif // COMPILER1
380 #endif // INCLUDE_JVMCI
381 #endif // COMPILER2
382
383 if (PrintNMethodStatistics) {
384 nmethod::print_statistics();
385 }
386 if (CountCompiledCalls) {
387 print_method_invocation_histogram();
388 }
389
390 print_method_profiling_data();
391
392 if (TimeOopMap) {
393 GenerateOopMap::print_time();
394 }
395 if (PrintSymbolTableSizeHistogram) {
396 SymbolTable::print_histogram();
397 }
398 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
399 BytecodeCounter::print();
400 }
401 if (PrintBytecodePairHistogram) {
402 BytecodePairHistogram::print();
403 }
404
405 if (PrintCodeCache) {
406 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
407 CodeCache::print();
408 }
409
410 // CodeHeap State Analytics.
411 if (PrintCodeHeapAnalytics) {
412 CompileBroker::print_heapinfo(nullptr, "all", 4096); // details
413 }
414
415 LogStreamHandle(Debug, codecache, nmethod) log;
416 if (log.is_enabled()) {
417 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
418 CodeCache::print_nmethods_on(&log);
419 }
420
421 #ifndef PRODUCT
422 if (PrintCodeCache2) {
423 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
424 CodeCache::print_internals();
425 }
426 #endif
427
428 if (VerifyOops && Verbose) {
429 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
430 }
431
432 print_bytecode_count();
433
434 if (PrintSystemDictionaryAtExit) {
435 ResourceMark rm;
436 MutexLocker mcld(ClassLoaderDataGraph_lock);
437 SystemDictionary::print();
438 }
439
440 if (PrintClassLoaderDataGraphAtExit) {
441 ResourceMark rm;
442 MutexLocker mcld(ClassLoaderDataGraph_lock);
443 ClassLoaderDataGraph::print();
444 }
445
446 // Native memory tracking data
447 if (PrintNMTStatistics) {
448 MemTracker::final_report(tty);
449 }
450
451 if (PrintMetaspaceStatisticsAtExit) {
452 MetaspaceUtils::print_basic_report(tty, 0);
453 }
454
455 if (CompilerOracle::should_print_final_memstat_report()) {
456 CompilationMemoryStatistic::print_all_by_size(tty, false, 0);
457 }
458
459 ThreadsSMRSupport::log_statistics();
460
461 log_vm_init_stats(true /* use_tty */);
462 }
463
464 // Note: before_exit() can be executed only once, if more than one threads
465 // are trying to shutdown the VM at the same time, only one thread
466 // can run before_exit() and all other threads must wait.
467 void before_exit(JavaThread* thread, bool halt) {
468 #define BEFORE_EXIT_NOT_RUN 0
469 #define BEFORE_EXIT_RUNNING 1
470 #define BEFORE_EXIT_DONE 2
471 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
472
473 Events::log(thread, "Before exit entered");
474
475 // Note: don't use a Mutex to guard the entire before_exit(), as
476 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
477 // A CAS or OSMutex would work just fine but then we need to manipulate
478 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
479 // for synchronization.
480 { MonitorLocker ml(BeforeExit_lock);
481 switch (_before_exit_status) {
482 case BEFORE_EXIT_NOT_RUN:
483 _before_exit_status = BEFORE_EXIT_RUNNING;
484 break;
485 case BEFORE_EXIT_RUNNING:
486 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
487 ml.wait();
488 }
489 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
490 return;
491 case BEFORE_EXIT_DONE:
492 // need block to avoid SS compiler bug
493 {
494 return;
495 }
496 }
497 }
498
499 // At this point only one thread is executing this logic. Any other threads
500 // attempting to invoke before_exit() will wait above and return early once
501 // this thread finishes before_exit().
502
503 // Do not add any additional shutdown logic between the above mutex logic and
504 // leak sanitizer logic below. Any additional shutdown code which performs some
505 // cleanup should be added after the leak sanitizer logic below.
506
507 #ifdef LEAK_SANITIZER
508 // If we are built with LSan, we need to perform leak checking. If we are
509 // terminating normally, not halting and no VM error, we perform a normal
510 // leak check which terminates if leaks are found. If we are not terminating
511 // normally, halting or VM error, we perform a recoverable leak check which
512 // prints leaks but will not terminate.
513 if (!halt && !VMError::is_error_reported()) {
514 LSAN_DO_LEAK_CHECK();
515 } else {
516 // Ignore the return value.
517 static_cast<void>(LSAN_DO_RECOVERABLE_LEAK_CHECK());
518 }
519 #endif
520
521 #if INCLUDE_CDS
522 MethodProfiler::process_method_hotness();
523 #endif
524
525 // Actual shutdown logic begins here.
526
527 #if INCLUDE_JVMCI
528 if (EnableJVMCI) {
529 JVMCI::shutdown(thread);
530 }
531 #endif
532
533 #if INCLUDE_CDS
534 ClassListWriter::write_resolved_constants();
535 ClassListWriter::write_reflection_data();
536 ClassListWriter::write_loader_negative_lookup_cache();
537 // Dynamic CDS dumping must happen whilst we can still reliably
538 // run Java code.
539 if (CDSConfig::is_dumping_preimage_static_archive()) {
540 // Creating the hotspot.cds.preimage file
541 MetaspaceShared::preload_and_dump(thread);
542 } else {
543 DynamicArchive::dump_at_exit(thread, ArchiveClassesAtExit);
544 }
545 assert(!thread->has_pending_exception(), "must be");
546 #endif
547
548 SCCache::close(); // Write final data and close archive
549
550 // Hang forever on exit if we're reporting an error.
551 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
552 os::infinite_sleep();
553 }
554
555 EventThreadEnd event;
556 if (event.should_commit()) {
557 event.set_thread(JFR_JVM_THREAD_ID(thread));
558 event.commit();
559 }
560
561 JFR_ONLY(Jfr::on_vm_shutdown(false, halt);)
562
563 // Stop the WatcherThread. We do this before disenrolling various
564 // PeriodicTasks to reduce the likelihood of races.
565 WatcherThread::stop();
566
567 // shut down the StatSampler task
568 StatSampler::disengage();
569 StatSampler::destroy();
570
571 NativeHeapTrimmer::cleanup();
572
573 // Stop concurrent GC threads
574 Universe::heap()->stop();
575
576 // Print GC/heap related information.
577 Log(gc, heap, exit) log;
578 if (log.is_info()) {
579 ResourceMark rm;
580 LogStream ls_info(log.info());
581 Universe::print_on(&ls_info);
582 if (log.is_trace()) {
583 LogStream ls_trace(log.trace());
584 MutexLocker mcld(ClassLoaderDataGraph_lock);
585 ClassLoaderDataGraph::print_on(&ls_trace);
586 }
587 }
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 if (JvmtiExport::should_post_thread_life()) {
603 JvmtiExport::post_thread_end(thread);
604 }
605
606 // Always call even when there are not JVMTI environments yet, since environments
607 // may be attached late and JVMTI must track phases of VM execution
608 JvmtiExport::post_vm_death();
609 JvmtiAgentList::unload_agents();
610
611 // Terminate the signal thread
612 // Note: we don't wait until it actually dies.
613 os::terminate_signal_thread();
614
615 if (VerifyTrainingData) {
616 EXCEPTION_MARK;
617 CompilationPolicy::replay_training_at_init(true, THREAD); // implies TrainingData::verify()
618 }
619
620 print_statistics();
621 Universe::heap()->print_tracing_info();
622
623 { MutexLocker ml(BeforeExit_lock);
624 _before_exit_status = BEFORE_EXIT_DONE;
625 BeforeExit_lock->notify_all();
626 }
627
628 if (VerifyStringTableAtExit) {
629 size_t fail_cnt = StringTable::verify_and_compare_entries();
630 if (fail_cnt != 0) {
631 tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT, fail_cnt);
632 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
633 }
634 }
635
636 #undef BEFORE_EXIT_NOT_RUN
637 #undef BEFORE_EXIT_RUNNING
638 #undef BEFORE_EXIT_DONE
639 }
640
641 void vm_exit(int code) {
642 Thread* thread =
643 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : nullptr;
644 if (thread == nullptr) {
645 // very early initialization failure -- just exit
646 vm_direct_exit(code);
647 }
648
649 // We'd like to add an entry to the XML log to show that the VM is
650 // terminating, but we can't safely do that here. The logic to make
651 // XML termination logging safe is tied to the termination of the
652 // VMThread, and it doesn't terminate on this exit path. See 8222534.
653
654 if (VMThread::vm_thread() != nullptr) {
655 if (thread->is_Java_thread()) {
656 // We must be "in_vm" for the code below to work correctly.
657 // Historically there must have been some exit path for which
658 // that was not the case and so we set it explicitly - even
659 // though we no longer know what that path may be.
660 JavaThread::cast(thread)->set_thread_state(_thread_in_vm);
661 }
662
663 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
664 VM_Exit op(code);
665
666 // 4945125 The vm thread comes to a safepoint during exit.
667 // GC vm_operations can get caught at the safepoint, and the
668 // heap is unparseable if they are caught. Grab the Heap_lock
669 // to prevent this. The GC vm_operations will not be able to
670 // queue until after we release it, but we never do that as we
671 // are terminating the VM process.
672 MutexLocker ml(Heap_lock);
673
674 VMThread::execute(&op);
675 // should never reach here; but in case something wrong with VM Thread.
676 vm_direct_exit(code);
677 } else {
678 // VM thread is gone, just exit
679 vm_direct_exit(code);
680 }
681 ShouldNotReachHere();
682 }
683
684 void notify_vm_shutdown() {
685 // For now, just a dtrace probe.
686 HOTSPOT_VM_SHUTDOWN();
687 }
688
689 void vm_direct_exit(int code) {
690 notify_vm_shutdown();
691 os::wait_for_keypress_at_exit();
692 os::exit(code);
693 }
694
695 void vm_direct_exit(int code, const char* message) {
696 if (message != nullptr) {
697 tty->print_cr("%s", message);
698 }
699 vm_direct_exit(code);
700 }
701
702 static void vm_perform_shutdown_actions() {
703 if (is_init_completed()) {
704 Thread* thread = Thread::current_or_null();
705 if (thread != nullptr && thread->is_Java_thread()) {
706 // We are leaving the VM, set state to native (in case any OS exit
707 // handlers call back to the VM)
708 JavaThread* jt = JavaThread::cast(thread);
709 // Must always be walkable or have no last_Java_frame when in
710 // thread_in_native
711 jt->frame_anchor()->make_walkable();
712 jt->set_thread_state(_thread_in_native);
713 }
714 }
715 notify_vm_shutdown();
716 }
717
718 void vm_shutdown()
719 {
720 vm_perform_shutdown_actions();
721 os::wait_for_keypress_at_exit();
722 os::shutdown();
723 }
724
725 void vm_abort(bool dump_core) {
726 vm_perform_shutdown_actions();
727 os::wait_for_keypress_at_exit();
728
729 // Flush stdout and stderr before abort.
730 fflush(stdout);
731 fflush(stderr);
732
733 os::abort(dump_core);
734 ShouldNotReachHere();
735 }
736
737 static void vm_notify_during_cds_dumping(const char* error, const char* message) {
738 if (error != nullptr) {
739 tty->print_cr("Error occurred during CDS dumping");
740 tty->print("%s", error);
741 if (message != nullptr) {
742 tty->print_cr(": %s", message);
743 }
744 else {
745 tty->cr();
746 }
747 }
748 }
749
750 void vm_exit_during_cds_dumping(const char* error, const char* message) {
751 vm_notify_during_cds_dumping(error, message);
752
753 // Failure during CDS dumping, we don't want to dump core
754 vm_abort(false);
755 }
756
757 static void vm_notify_during_shutdown(const char* error, const char* message) {
758 if (error != nullptr) {
759 tty->print_cr("Error occurred during initialization of VM");
760 tty->print("%s", error);
761 if (message != nullptr) {
762 tty->print_cr(": %s", message);
763 }
764 else {
765 tty->cr();
766 }
767 }
768 if (ShowMessageBoxOnError && WizardMode) {
769 fatal("Error occurred during initialization of VM");
770 }
771 }
772
773 void vm_exit_during_initialization() {
774 vm_notify_during_shutdown(nullptr, nullptr);
775
776 // Failure during initialization, we don't want to dump core
777 vm_abort(false);
778 }
779
780 void vm_exit_during_initialization(Handle exception) {
781 tty->print_cr("Error occurred during initialization of VM");
782 // If there are exceptions on this thread it must be cleared
783 // first and here. Any future calls to EXCEPTION_MARK requires
784 // that no pending exceptions exist.
785 JavaThread* THREAD = JavaThread::current(); // can't be null
786 if (HAS_PENDING_EXCEPTION) {
787 CLEAR_PENDING_EXCEPTION;
788 }
789 java_lang_Throwable::print_stack_trace(exception, tty);
790 tty->cr();
791 vm_notify_during_shutdown(nullptr, nullptr);
792
793 // Failure during initialization, we don't want to dump core
794 vm_abort(false);
795 }
796
797 void vm_exit_during_initialization(Symbol* ex, const char* message) {
798 ResourceMark rm;
799 vm_notify_during_shutdown(ex->as_C_string(), message);
800
801 // Failure during initialization, we don't want to dump core
802 vm_abort(false);
803 }
804
805 void vm_exit_during_initialization(const char* error, const char* message) {
806 vm_notify_during_shutdown(error, message);
807
808 // Failure during initialization, we don't want to dump core
809 vm_abort(false);
810 }
811
812 void vm_shutdown_during_initialization(const char* error, const char* message) {
813 vm_notify_during_shutdown(error, message);
814 vm_shutdown();
815 }
816
817 JDK_Version JDK_Version::_current;
818 const char* JDK_Version::_java_version;
819 const char* JDK_Version::_runtime_name;
820 const char* JDK_Version::_runtime_version;
821 const char* JDK_Version::_runtime_vendor_version;
822 const char* JDK_Version::_runtime_vendor_vm_bug_url;
823
824 void JDK_Version::initialize() {
825 assert(!_current.is_valid(), "Don't initialize twice");
826
827 int major = VM_Version::vm_major_version();
828 int minor = VM_Version::vm_minor_version();
829 int security = VM_Version::vm_security_version();
830 int build = VM_Version::vm_build_number();
831 int patch = VM_Version::vm_patch_version();
832 _current = JDK_Version(major, minor, security, patch, build);
833 }
834
835 void JDK_Version_init() {
836 JDK_Version::initialize();
837 }
838
839 static int64_t encode_jdk_version(const JDK_Version& v) {
840 return
841 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
842 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
843 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
844 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
845 ((int64_t)v.build_number() << (BitsPerByte * 0));
846 }
847
848 int JDK_Version::compare(const JDK_Version& other) const {
849 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
850 uint64_t e = encode_jdk_version(*this);
851 uint64_t o = encode_jdk_version(other);
852 return (e > o) ? 1 : ((e == o) ? 0 : -1);
853 }
854
855 /* See JEP 223 */
856 void JDK_Version::to_string(char* buffer, size_t buflen) const {
857 assert(buffer && buflen > 0, "call with useful buffer");
858 size_t index = 0;
859
860 if (!is_valid()) {
861 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
862 } else {
863 int rc = jio_snprintf(
864 &buffer[index], buflen - index, "%d.%d", _major, _minor);
865 if (rc == -1) return;
866 index += rc;
867 if (_patch > 0) {
868 rc = jio_snprintf(&buffer[index], buflen - index, ".%d.%d", _security, _patch);
869 if (rc == -1) return;
870 index += rc;
871 } else if (_security > 0) {
872 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
873 if (rc == -1) return;
874 index += rc;
875 }
876 if (_build > 0) {
877 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
878 if (rc == -1) return;
879 index += rc;
880 }
881 }
882 }