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/cds_globals.hpp"
27 #include "cds/cdsConfig.hpp"
28 #include "cds/classListWriter.hpp"
29 #include "cds/classPreloader.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/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.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();
178 ClassPreloader::print_counters();
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 Runtime1::print_counters_on(&log);
230 OptoRuntime::print_counters_on(&log);
231 InterpreterRuntime::print_counters_on(&log);
232 Deoptimization::print_counters_on(&log);
233 } else {
234 log.print_cr(": no info (%s is disabled)", (UsePerfData ? "ProfileRuntimeCalls" : "UsePerfData"));
235 }
236 log.cr();
237 perf_jvm_print_on(&log);
238 log.cr();
239 MethodHandles::print_counters_on(&log);
240 }
241 }
242
243 void print_bytecode_count() {
244 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
245 tty->print_cr("[BytecodeCounter::counter_value = %ld]", BytecodeCounter::counter_value());
246 }
247 }
248
249 #ifndef PRODUCT
250
251 // Statistics printing (method invocation histogram)
252
253 GrowableArray<Method*>* collected_invoked_methods;
254
255 static void collect_invoked_methods(Method* m) {
256 if (m->invocation_count() + m->compiled_invocation_count() >= 1) {
257 collected_invoked_methods->push(m);
258 }
259 }
260
261
262 // Invocation count accumulators should be unsigned long to shift the
263 // overflow border. Longer-running workloads tend to create invocation
264 // counts which already overflow 32-bit counters for individual methods.
265 static void print_method_invocation_histogram() {
266 ResourceMark rm;
267 collected_invoked_methods = new GrowableArray<Method*>(1024);
268 SystemDictionary::methods_do(collect_invoked_methods);
269 collected_invoked_methods->sort(&compare_methods);
270 //
271 tty->cr();
272 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
273 tty->cr();
274 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
275 uint64_t total = 0,
276 int_total = 0,
277 comp_total = 0,
278 special_total= 0,
279 static_total = 0,
280 final_total = 0,
281 synch_total = 0,
282 native_total = 0,
283 access_total = 0;
284 for (int index = 0; index < collected_invoked_methods->length(); index++) {
285 // Counter values returned from getter methods are signed int.
286 // To shift the overflow border by a factor of two, we interpret
287 // them here as unsigned long. A counter can't be negative anyway.
288 Method* m = collected_invoked_methods->at(index);
289 uint64_t iic = (uint64_t)m->invocation_count();
290 uint64_t cic = (uint64_t)m->compiled_invocation_count();
291 if ((iic + cic) >= (uint64_t)MethodHistogramCutoff) m->print_invocation_count(tty);
292 int_total += iic;
293 comp_total += cic;
294 if (m->is_final()) final_total += iic + cic;
295 if (m->is_static()) static_total += iic + cic;
296 if (m->is_synchronized()) synch_total += iic + cic;
297 if (m->is_native()) native_total += iic + cic;
298 if (m->is_accessor()) access_total += iic + cic;
299 }
300 tty->cr();
301 total = int_total + comp_total;
302 special_total = final_total + static_total +synch_total + native_total + access_total;
303 tty->print_cr("Invocations summary for %d methods:", collected_invoked_methods->length());
304 double total_div = (double)total;
305 tty->print_cr("\t" UINT64_FORMAT_W(12) " (100%%) total", total);
306 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- interpreted", int_total, 100.0 * (double)int_total / total_div);
307 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- compiled", comp_total, 100.0 * (double)comp_total / total_div);
308 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- special methods (interpreted and compiled)",
309 special_total, 100.0 * (double)special_total/ total_div);
310 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- synchronized",synch_total, 100.0 * (double)synch_total / total_div);
311 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- final", final_total, 100.0 * (double)final_total / total_div);
312 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- static", static_total, 100.0 * (double)static_total / total_div);
313 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- native", native_total, 100.0 * (double)native_total / total_div);
314 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- accessor", access_total, 100.0 * (double)access_total / total_div);
315 tty->cr();
316 SharedRuntime::print_call_statistics_on(tty);
317 }
318
319 #else
320
321 static void print_method_invocation_histogram() {}
322
323 #endif // PRODUCT
324
325
326 // General statistics printing (profiling ...)
327 void print_statistics() {
328 if (ReplayTraining && PrintTrainingInfo) {
329 TrainingData::print_archived_training_data_on(tty);
330 }
331 if (CITime) {
332 CompileBroker::print_times();
333 }
334
335 #ifdef COMPILER1
336 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
337 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
338 Runtime1::print_statistics_on(tty);
339 SharedRuntime::print_statistics();
340 }
341 #endif /* COMPILER1 */
342
343 #ifdef COMPILER2
344 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
345 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
346 Compile::print_statistics();
347 Deoptimization::print_statistics();
348 #ifndef COMPILER1
349 SharedRuntime::print_statistics();
350 #endif //COMPILER1
351 }
352
353 if (PrintLockStatistics || PrintPreciseRTMLockingStatistics) {
354 OptoRuntime::print_named_counters();
355 }
356 #ifdef ASSERT
357 if (CollectIndexSetStatistics) {
358 IndexSet::print_statistics();
359 }
360 #endif // ASSERT
361 #else // COMPILER2
362 #if INCLUDE_JVMCI
363 #ifndef COMPILER1
364 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
365 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
366 Deoptimization::print_statistics();
367 SharedRuntime::print_statistics();
368 }
369 #endif // COMPILER1
370 #endif // INCLUDE_JVMCI
371 #endif // COMPILER2
372
373 if (PrintNMethodStatistics) {
374 nmethod::print_statistics();
375 }
376 if (CountCompiledCalls) {
377 print_method_invocation_histogram();
378 }
379
380 print_method_profiling_data();
381
382 if (TimeOopMap) {
383 GenerateOopMap::print_time();
384 }
385 if (PrintSymbolTableSizeHistogram) {
386 SymbolTable::print_histogram();
387 }
388 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
389 BytecodeCounter::print();
390 }
391 if (PrintBytecodePairHistogram) {
392 BytecodePairHistogram::print();
393 }
394
395 if (PrintCodeCache) {
396 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
397 CodeCache::print();
398 }
399
400 // CodeHeap State Analytics.
401 if (PrintCodeHeapAnalytics) {
402 CompileBroker::print_heapinfo(nullptr, "all", 4096); // details
403 }
404
405 LogStreamHandle(Debug, codecache, nmethod) log;
406 if (log.is_enabled()) {
407 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
408 CodeCache::print_nmethods_on(&log);
409 }
410
411 #ifndef PRODUCT
412 if (PrintCodeCache2) {
413 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
414 CodeCache::print_internals();
415 }
416 #endif
417
418 if (VerifyOops && Verbose) {
419 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
420 }
421
422 print_bytecode_count();
423
424 if (PrintSystemDictionaryAtExit) {
425 ResourceMark rm;
426 MutexLocker mcld(ClassLoaderDataGraph_lock);
427 SystemDictionary::print();
428 }
429
430 if (PrintClassLoaderDataGraphAtExit) {
431 ResourceMark rm;
432 MutexLocker mcld(ClassLoaderDataGraph_lock);
433 ClassLoaderDataGraph::print();
434 }
435
436 // Native memory tracking data
437 if (PrintNMTStatistics) {
438 MemTracker::final_report(tty);
439 }
440
441 if (PrintMetaspaceStatisticsAtExit) {
442 MetaspaceUtils::print_basic_report(tty, 0);
443 }
444
445 if (CompilerOracle::should_print_final_memstat_report()) {
446 CompilationMemoryStatistic::print_all_by_size(tty, false, 0);
447 }
448
449 ThreadsSMRSupport::log_statistics();
450
451 log_vm_init_stats();
452 }
453
454 // Note: before_exit() can be executed only once, if more than one threads
455 // are trying to shutdown the VM at the same time, only one thread
456 // can run before_exit() and all other threads must wait.
457 void before_exit(JavaThread* thread, bool halt) {
458 #define BEFORE_EXIT_NOT_RUN 0
459 #define BEFORE_EXIT_RUNNING 1
460 #define BEFORE_EXIT_DONE 2
461 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
462
463 Events::log(thread, "Before exit entered");
464
465 // Note: don't use a Mutex to guard the entire before_exit(), as
466 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
467 // A CAS or OSMutex would work just fine but then we need to manipulate
468 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
469 // for synchronization.
470 { MonitorLocker ml(BeforeExit_lock);
471 switch (_before_exit_status) {
472 case BEFORE_EXIT_NOT_RUN:
473 _before_exit_status = BEFORE_EXIT_RUNNING;
474 break;
475 case BEFORE_EXIT_RUNNING:
476 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
477 ml.wait();
478 }
479 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
480 return;
481 case BEFORE_EXIT_DONE:
482 // need block to avoid SS compiler bug
483 {
484 return;
485 }
486 }
487 }
488
489 // At this point only one thread is executing this logic. Any other threads
490 // attempting to invoke before_exit() will wait above and return early once
491 // this thread finishes before_exit().
492
493 // Do not add any additional shutdown logic between the above mutex logic and
494 // leak sanitizer logic below. Any additional shutdown code which performs some
495 // cleanup should be added after the leak sanitizer logic below.
496
497 #ifdef LEAK_SANITIZER
498 // If we are built with LSan, we need to perform leak checking. If we are
499 // terminating normally, not halting and no VM error, we perform a normal
500 // leak check which terminates if leaks are found. If we are not terminating
501 // normally, halting or VM error, we perform a recoverable leak check which
502 // prints leaks but will not terminate.
503 if (!halt && !VMError::is_error_reported()) {
504 LSAN_DO_LEAK_CHECK();
505 } else {
506 // Ignore the return value.
507 static_cast<void>(LSAN_DO_RECOVERABLE_LEAK_CHECK());
508 }
509 #endif
510
511 MethodProfiler::process_method_hotness();
512
513 #if INCLUDE_CDS
514 ClassListWriter::write_resolved_constants();
515 ClassListWriter::write_reflection_data();
516 ClassListWriter::write_loader_negative_lookup_cache();
517 // Dynamic CDS dumping must happen whilst we can still reliably
518 // run Java code.
519 if (CDSConfig::is_dumping_preimage_static_archive()) {
520 // Creating the hotspot.cds.preimage file
521 MetaspaceShared::preload_and_dump();
522 } else {
523 DynamicArchive::dump_at_exit(thread, ArchiveClassesAtExit);
524 }
525 assert(!thread->has_pending_exception(), "must be");
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 SCCache::close(); // Write final data and close archive
537
538 // Hang forever on exit if we're reporting an error.
539 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
540 os::infinite_sleep();
541 }
542
543 EventThreadEnd event;
544 if (event.should_commit()) {
545 event.set_thread(JFR_JVM_THREAD_ID(thread));
546 event.commit();
547 }
548
549 JFR_ONLY(Jfr::on_vm_shutdown(false, halt);)
550
551 // Stop the WatcherThread. We do this before disenrolling various
552 // PeriodicTasks to reduce the likelihood of races.
553 WatcherThread::stop();
554
555 // shut down the StatSampler task
556 StatSampler::disengage();
557 StatSampler::destroy();
558
559 NativeHeapTrimmer::cleanup();
560
561 // Stop concurrent GC threads
562 Universe::heap()->stop();
563
564 // Print GC/heap related information.
565 Log(gc, heap, exit) log;
566 if (log.is_info()) {
567 ResourceMark rm;
568 LogStream ls_info(log.info());
569 Universe::print_on(&ls_info);
570 if (log.is_trace()) {
571 LogStream ls_trace(log.trace());
572 MutexLocker mcld(ClassLoaderDataGraph_lock);
573 ClassLoaderDataGraph::print_on(&ls_trace);
574 }
575 }
576
577 if (PrintBytecodeHistogram) {
578 BytecodeHistogram::print(PrintBytecodeHistogramCutoff);
579 }
580
581 #ifdef LINUX
582 if (DumpPerfMapAtExit) {
583 CodeCache::write_perf_map();
584 }
585 #endif
586
587 if (JvmtiExport::should_post_thread_life()) {
588 JvmtiExport::post_thread_end(thread);
589 }
590
591 // Always call even when there are not JVMTI environments yet, since environments
592 // may be attached late and JVMTI must track phases of VM execution
593 JvmtiExport::post_vm_death();
594 JvmtiAgentList::unload_agents();
595
596 // Terminate the signal thread
597 // Note: we don't wait until it actually dies.
598 os::terminate_signal_thread();
599
600 if (VerifyTrainingData) {
601 EXCEPTION_MARK;
602 CompilationPolicy::replay_training_at_init(true, THREAD); // implies TrainingData::verify()
603 }
604
605 print_statistics();
606 Universe::heap()->print_tracing_info();
607
608 { MutexLocker ml(BeforeExit_lock);
609 _before_exit_status = BEFORE_EXIT_DONE;
610 BeforeExit_lock->notify_all();
611 }
612
613 if (VerifyStringTableAtExit) {
614 size_t fail_cnt = StringTable::verify_and_compare_entries();
615 if (fail_cnt != 0) {
616 tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT, fail_cnt);
617 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
618 }
619 }
620
621 #undef BEFORE_EXIT_NOT_RUN
622 #undef BEFORE_EXIT_RUNNING
623 #undef BEFORE_EXIT_DONE
624 }
625
626 void vm_exit(int code) {
627 Thread* thread =
628 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : nullptr;
629 if (thread == nullptr) {
630 // very early initialization failure -- just exit
631 vm_direct_exit(code);
632 }
633
634 // We'd like to add an entry to the XML log to show that the VM is
635 // terminating, but we can't safely do that here. The logic to make
636 // XML termination logging safe is tied to the termination of the
637 // VMThread, and it doesn't terminate on this exit path. See 8222534.
638
639 if (VMThread::vm_thread() != nullptr) {
640 if (thread->is_Java_thread()) {
641 // We must be "in_vm" for the code below to work correctly.
642 // Historically there must have been some exit path for which
643 // that was not the case and so we set it explicitly - even
644 // though we no longer know what that path may be.
645 JavaThread::cast(thread)->set_thread_state(_thread_in_vm);
646 }
647
648 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
649 VM_Exit op(code);
650
651 // 4945125 The vm thread comes to a safepoint during exit.
652 // GC vm_operations can get caught at the safepoint, and the
653 // heap is unparseable if they are caught. Grab the Heap_lock
654 // to prevent this. The GC vm_operations will not be able to
655 // queue until after we release it, but we never do that as we
656 // are terminating the VM process.
657 MutexLocker ml(Heap_lock);
658
659 VMThread::execute(&op);
660 // should never reach here; but in case something wrong with VM Thread.
661 vm_direct_exit(code);
662 } else {
663 // VM thread is gone, just exit
664 vm_direct_exit(code);
665 }
666 ShouldNotReachHere();
667 }
668
669 void notify_vm_shutdown() {
670 // For now, just a dtrace probe.
671 HOTSPOT_VM_SHUTDOWN();
672 }
673
674 void vm_direct_exit(int code) {
675 notify_vm_shutdown();
676 os::wait_for_keypress_at_exit();
677 os::exit(code);
678 }
679
680 void vm_direct_exit(int code, const char* message) {
681 if (message != nullptr) {
682 tty->print_cr("%s", message);
683 }
684 vm_direct_exit(code);
685 }
686
687 static void vm_perform_shutdown_actions() {
688 if (is_init_completed()) {
689 Thread* thread = Thread::current_or_null();
690 if (thread != nullptr && thread->is_Java_thread()) {
691 // We are leaving the VM, set state to native (in case any OS exit
692 // handlers call back to the VM)
693 JavaThread* jt = JavaThread::cast(thread);
694 // Must always be walkable or have no last_Java_frame when in
695 // thread_in_native
696 jt->frame_anchor()->make_walkable();
697 jt->set_thread_state(_thread_in_native);
698 }
699 }
700 notify_vm_shutdown();
701 }
702
703 void vm_shutdown()
704 {
705 vm_perform_shutdown_actions();
706 os::wait_for_keypress_at_exit();
707 os::shutdown();
708 }
709
710 void vm_abort(bool dump_core) {
711 vm_perform_shutdown_actions();
712 os::wait_for_keypress_at_exit();
713
714 // Flush stdout and stderr before abort.
715 fflush(stdout);
716 fflush(stderr);
717
718 os::abort(dump_core);
719 ShouldNotReachHere();
720 }
721
722 static void vm_notify_during_cds_dumping(const char* error, const char* message) {
723 if (error != nullptr) {
724 tty->print_cr("Error occurred during CDS dumping");
725 tty->print("%s", error);
726 if (message != nullptr) {
727 tty->print_cr(": %s", message);
728 }
729 else {
730 tty->cr();
731 }
732 }
733 }
734
735 void vm_exit_during_cds_dumping(const char* error, const char* message) {
736 vm_notify_during_cds_dumping(error, message);
737
738 // Failure during CDS dumping, we don't want to dump core
739 vm_abort(false);
740 }
741
742 static void vm_notify_during_shutdown(const char* error, const char* message) {
743 if (error != nullptr) {
744 tty->print_cr("Error occurred during initialization of VM");
745 tty->print("%s", error);
746 if (message != nullptr) {
747 tty->print_cr(": %s", message);
748 }
749 else {
750 tty->cr();
751 }
752 }
753 if (ShowMessageBoxOnError && WizardMode) {
754 fatal("Error occurred during initialization of VM");
755 }
756 }
757
758 void vm_exit_during_initialization() {
759 vm_notify_during_shutdown(nullptr, nullptr);
760
761 // Failure during initialization, we don't want to dump core
762 vm_abort(false);
763 }
764
765 void vm_exit_during_initialization(Handle exception) {
766 tty->print_cr("Error occurred during initialization of VM");
767 // If there are exceptions on this thread it must be cleared
768 // first and here. Any future calls to EXCEPTION_MARK requires
769 // that no pending exceptions exist.
770 JavaThread* THREAD = JavaThread::current(); // can't be null
771 if (HAS_PENDING_EXCEPTION) {
772 CLEAR_PENDING_EXCEPTION;
773 }
774 java_lang_Throwable::print_stack_trace(exception, tty);
775 tty->cr();
776 vm_notify_during_shutdown(nullptr, nullptr);
777
778 // Failure during initialization, we don't want to dump core
779 vm_abort(false);
780 }
781
782 void vm_exit_during_initialization(Symbol* ex, const char* message) {
783 ResourceMark rm;
784 vm_notify_during_shutdown(ex->as_C_string(), message);
785
786 // Failure during initialization, we don't want to dump core
787 vm_abort(false);
788 }
789
790 void vm_exit_during_initialization(const char* error, const char* message) {
791 vm_notify_during_shutdown(error, message);
792
793 // Failure during initialization, we don't want to dump core
794 vm_abort(false);
795 }
796
797 void vm_shutdown_during_initialization(const char* error, const char* message) {
798 vm_notify_during_shutdown(error, message);
799 vm_shutdown();
800 }
801
802 JDK_Version JDK_Version::_current;
803 const char* JDK_Version::_java_version;
804 const char* JDK_Version::_runtime_name;
805 const char* JDK_Version::_runtime_version;
806 const char* JDK_Version::_runtime_vendor_version;
807 const char* JDK_Version::_runtime_vendor_vm_bug_url;
808
809 void JDK_Version::initialize() {
810 assert(!_current.is_valid(), "Don't initialize twice");
811
812 int major = VM_Version::vm_major_version();
813 int minor = VM_Version::vm_minor_version();
814 int security = VM_Version::vm_security_version();
815 int build = VM_Version::vm_build_number();
816 int patch = VM_Version::vm_patch_version();
817 _current = JDK_Version(major, minor, security, patch, build);
818 }
819
820 void JDK_Version_init() {
821 JDK_Version::initialize();
822 }
823
824 static int64_t encode_jdk_version(const JDK_Version& v) {
825 return
826 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
827 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
828 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
829 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
830 ((int64_t)v.build_number() << (BitsPerByte * 0));
831 }
832
833 int JDK_Version::compare(const JDK_Version& other) const {
834 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
835 uint64_t e = encode_jdk_version(*this);
836 uint64_t o = encode_jdk_version(other);
837 return (e > o) ? 1 : ((e == o) ? 0 : -1);
838 }
839
840 /* See JEP 223 */
841 void JDK_Version::to_string(char* buffer, size_t buflen) const {
842 assert(buffer && buflen > 0, "call with useful buffer");
843 size_t index = 0;
844
845 if (!is_valid()) {
846 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
847 } else {
848 int rc = jio_snprintf(
849 &buffer[index], buflen - index, "%d.%d", _major, _minor);
850 if (rc == -1) return;
851 index += rc;
852 if (_patch > 0) {
853 rc = jio_snprintf(&buffer[index], buflen - index, ".%d.%d", _security, _patch);
854 if (rc == -1) return;
855 index += rc;
856 } else if (_security > 0) {
857 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
858 if (rc == -1) return;
859 index += rc;
860 }
861 if (_build > 0) {
862 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
863 if (rc == -1) return;
864 index += rc;
865 }
866 }
867 }