1 /*
2 * Copyright (c) 1997, 2016, 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 "classfile/classLoader.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compilerOracle.hpp"
32 #include "interpreter/bytecodeHistogram.hpp"
33 #if INCLUDE_JFR
34 #include "jfr/jfrEvents.hpp"
35 #include "jfr/support/jfrThreadId.hpp"
36 #endif
37 #include "memory/genCollectedHeap.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/universe.hpp"
40 #include "oops/constantPool.hpp"
41 #include "oops/generateOopMap.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/instanceOop.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayOop.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "prims/jvmtiExport.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/biasedLocking.hpp"
51 #include "runtime/compilationPolicy.hpp"
52 #include "runtime/fprofiler.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/java.hpp"
56 #include "runtime/memprofiler.hpp"
57 #include "runtime/sharedRuntime.hpp"
58 #include "runtime/statSampler.hpp"
59 #include "runtime/sweeper.hpp"
60 #include "runtime/task.hpp"
61 #include "runtime/thread.inline.hpp"
62 #include "runtime/timer.hpp"
63 #include "runtime/vm_operations.hpp"
64 #include "services/memTracker.hpp"
65 #include "utilities/dtrace.hpp"
66 #include "utilities/globalDefinitions.hpp"
67 #include "utilities/histogram.hpp"
68 #include "utilities/macros.hpp"
69 #include "utilities/vmError.hpp"
70 #ifdef TARGET_ARCH_x86
71 # include "vm_version_x86.hpp"
72 #endif
73 #ifdef TARGET_ARCH_sparc
74 # include "vm_version_sparc.hpp"
75 #endif
76 #ifdef TARGET_ARCH_zero
77 # include "vm_version_zero.hpp"
78 #endif
79 #ifdef TARGET_ARCH_arm
80 # include "vm_version_arm.hpp"
81 #endif
82 #ifdef TARGET_ARCH_ppc
83 # include "vm_version_ppc.hpp"
84 #endif
85 #if INCLUDE_ALL_GCS
86 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
87 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
88 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
89 #endif // INCLUDE_ALL_GCS
90 #ifdef COMPILER1
91 #include "c1/c1_Compiler.hpp"
92 #include "c1/c1_Runtime1.hpp"
93 #endif
94 #ifdef COMPILER2
95 #include "code/compiledIC.hpp"
96 #include "compiler/methodLiveness.hpp"
97 #include "opto/compile.hpp"
98 #include "opto/indexSet.hpp"
99 #include "opto/runtime.hpp"
100 #endif
101 #if INCLUDE_JFR
102 #include "jfr/jfr.hpp"
103 #endif
104
105 #ifndef USDT2
106 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
107 #endif /* !USDT2 */
108
109 #ifndef PRODUCT
110
111 // Statistics printing (method invocation histogram)
112
113 GrowableArray<Method*>* collected_invoked_methods;
114
115 void collect_invoked_methods(Method* m) {
116 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
117 collected_invoked_methods->push(m);
118 }
119 }
120
121 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
122
123 GrowableArray<Method*>* collected_profiled_methods;
124
125 void collect_profiled_methods(Method* m) {
126 Thread* thread = Thread::current();
127 // This HandleMark prevents a huge amount of handles from being added
128 // to the metadata_handles() array on the thread.
129 HandleMark hm(thread);
130 methodHandle mh(thread, m);
131 if ((m->method_data() != NULL) &&
132 (PrintMethodData || CompilerOracle::should_print(mh))) {
133 collected_profiled_methods->push(m);
134 }
135 }
136
137
138 int compare_methods(Method** a, Method** b) {
139 // %%% there can be 32-bit overflow here
140 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
141 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
142 }
143
144
145 void print_method_invocation_histogram() {
146 ResourceMark rm;
147 HandleMark hm;
148 collected_invoked_methods = new GrowableArray<Method*>(1024);
149 SystemDictionary::methods_do(collect_invoked_methods);
150 collected_invoked_methods->sort(&compare_methods);
151 //
152 tty->cr();
153 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
154 tty->cr();
155 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
156 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
157 synch_total = 0, nativ_total = 0, acces_total = 0;
158 for (int index = 0; index < collected_invoked_methods->length(); index++) {
159 Method* m = collected_invoked_methods->at(index);
160 int c = m->invocation_count() + m->compiled_invocation_count();
161 if (c >= MethodHistogramCutoff) m->print_invocation_count();
162 int_total += m->invocation_count();
163 comp_total += m->compiled_invocation_count();
164 if (m->is_final()) final_total += c;
165 if (m->is_static()) static_total += c;
166 if (m->is_synchronized()) synch_total += c;
167 if (m->is_native()) nativ_total += c;
168 if (m->is_accessor()) acces_total += c;
169 }
170 tty->cr();
171 total = int_total + comp_total;
172 tty->print_cr("Invocations summary:");
173 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
174 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
175 tty->print_cr("\t%9d (100%%) total", total);
176 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
177 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
178 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
179 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
180 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
181 tty->cr();
182 SharedRuntime::print_call_statistics(comp_total);
183 }
184
185 void print_method_profiling_data() {
186 ResourceMark rm;
187 HandleMark hm;
188 collected_profiled_methods = new GrowableArray<Method*>(1024);
189 SystemDictionary::methods_do(collect_profiled_methods);
190 collected_profiled_methods->sort(&compare_methods);
191
192 int count = collected_profiled_methods->length();
193 int total_size = 0;
194 if (count > 0) {
195 for (int index = 0; index < count; index++) {
196 Method* m = collected_profiled_methods->at(index);
197 ttyLocker ttyl;
198 tty->print_cr("------------------------------------------------------------------------");
199 //m->print_name(tty);
200 m->print_invocation_count();
201 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
202 tty->cr();
203 // Dump data on parameters if any
204 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
205 tty->fill_to(2);
206 m->method_data()->parameters_type_data()->print_data_on(tty);
207 }
208 m->print_codes();
209 total_size += m->method_data()->size_in_bytes();
210 }
211 tty->print_cr("------------------------------------------------------------------------");
212 tty->print_cr("Total MDO size: %d bytes", total_size);
213 }
214 }
215
216 void print_bytecode_count() {
217 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
218 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
219 }
220 }
221
222 AllocStats alloc_stats;
223
224
225
226 // General statistics printing (profiling ...)
227 void print_statistics() {
228 #ifdef ASSERT
229
230 if (CountRuntimeCalls) {
231 extern Histogram *RuntimeHistogram;
232 RuntimeHistogram->print();
233 }
234
235 if (CountJNICalls) {
236 extern Histogram *JNIHistogram;
237 JNIHistogram->print();
238 }
239
240 if (CountJVMCalls) {
241 extern Histogram *JVMHistogram;
242 JVMHistogram->print();
243 }
244
245 #endif
246
247 if (MemProfiling) {
248 MemProfiler::disengage();
249 }
250
251 if (CITime) {
252 CompileBroker::print_times();
253 }
254
255 #ifdef COMPILER1
256 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
257 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
258 Runtime1::print_statistics();
259 Deoptimization::print_statistics();
260 SharedRuntime::print_statistics();
261 nmethod::print_statistics();
262 }
263 #endif /* COMPILER1 */
264
265 #ifdef COMPILER2
266 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
267 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
268 Compile::print_statistics();
269 #ifndef COMPILER1
270 Deoptimization::print_statistics();
271 nmethod::print_statistics();
272 SharedRuntime::print_statistics();
273 #endif //COMPILER1
274 os::print_statistics();
275 }
276
277 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
278 OptoRuntime::print_named_counters();
279 }
280
281 if (TimeLivenessAnalysis) {
282 MethodLiveness::print_times();
283 }
284 #ifdef ASSERT
285 if (CollectIndexSetStatistics) {
286 IndexSet::print_statistics();
287 }
288 #endif // ASSERT
289 #endif // COMPILER2
290 if (CountCompiledCalls) {
291 print_method_invocation_histogram();
292 }
293 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
294 print_method_profiling_data();
295 }
296 if (TimeCompiler) {
297 COMPILER2_PRESENT(Compile::print_timers();)
298 }
299 if (TimeCompilationPolicy) {
300 CompilationPolicy::policy()->print_time();
301 }
302 if (TimeOopMap) {
303 GenerateOopMap::print_time();
304 }
305 if (ProfilerCheckIntervals) {
306 PeriodicTask::print_intervals();
307 }
308 if (PrintSymbolTableSizeHistogram) {
309 SymbolTable::print_histogram();
310 }
311 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
312 BytecodeCounter::print();
313 }
314 if (PrintBytecodePairHistogram) {
315 BytecodePairHistogram::print();
316 }
317
318 if (PrintCodeCache) {
319 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
320 CodeCache::print();
321 }
322
323 if (PrintMethodFlushingStatistics) {
324 NMethodSweeper::print();
325 }
326
327 if (PrintCodeCache2) {
328 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
329 CodeCache::print_internals();
330 }
331
332 if (PrintClassStatistics) {
333 SystemDictionary::print_class_statistics();
334 }
335 if (PrintMethodStatistics) {
336 SystemDictionary::print_method_statistics();
337 }
338
339 if (PrintVtableStats) {
340 klassVtable::print_statistics();
341 klassItable::print_statistics();
342 }
343 if (VerifyOops) {
344 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
345 }
346
347 print_bytecode_count();
348 if (PrintMallocStatistics) {
349 tty->print("allocation stats: ");
350 alloc_stats.print();
351 tty->cr();
352 }
353
354 if (PrintSystemDictionaryAtExit) {
355 SystemDictionary::print();
356 }
357
358 if (PrintBiasedLockingStatistics) {
359 BiasedLocking::print_counters();
360 }
361
362 #ifdef ENABLE_ZAP_DEAD_LOCALS
363 #ifdef COMPILER2
364 if (ZapDeadCompiledLocals) {
365 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
366 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
367 }
368 #endif // COMPILER2
369 #endif // ENABLE_ZAP_DEAD_LOCALS
370 // Native memory tracking data
371 if (PrintNMTStatistics) {
372 MemTracker::final_report(tty);
373 }
374 }
375
376 #else // PRODUCT MODE STATISTICS
377
378 void print_statistics() {
379
380 if (CITime) {
381 CompileBroker::print_times();
382 }
383
384 if (PrintCodeCache) {
385 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
386 CodeCache::print();
387 }
388
389 if (PrintMethodFlushingStatistics) {
390 NMethodSweeper::print();
391 }
392
393 #ifdef COMPILER2
394 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
395 OptoRuntime::print_named_counters();
396 }
397 #endif
398 if (PrintBiasedLockingStatistics) {
399 BiasedLocking::print_counters();
400 }
401
402 // Native memory tracking data
403 if (PrintNMTStatistics) {
404 MemTracker::final_report(tty);
405 }
406 }
407
408 #endif
409
410
411 // Helper class for registering on_exit calls through JVM_OnExit
412
413 extern "C" {
414 typedef void (*__exit_proc)(void);
415 }
416
417 class ExitProc : public CHeapObj<mtInternal> {
418 private:
419 __exit_proc _proc;
420 // void (*_proc)(void);
421 ExitProc* _next;
422 public:
423 // ExitProc(void (*proc)(void)) {
424 ExitProc(__exit_proc proc) {
425 _proc = proc;
426 _next = NULL;
427 }
428 void evaluate() { _proc(); }
429 ExitProc* next() const { return _next; }
430 void set_next(ExitProc* next) { _next = next; }
431 };
432
433
434 // Linked list of registered on_exit procedures
435
436 static ExitProc* exit_procs = NULL;
437
438
439 extern "C" {
440 void register_on_exit_function(void (*func)(void)) {
441 ExitProc *entry = new ExitProc(func);
442 // Classic vm does not throw an exception in case the allocation failed,
443 if (entry != NULL) {
444 entry->set_next(exit_procs);
445 exit_procs = entry;
446 }
447 }
448 }
449
450 // Note: before_exit() can be executed only once, if more than one threads
451 // are trying to shutdown the VM at the same time, only one thread
452 // can run before_exit() and all other threads must wait.
453 void before_exit(JavaThread * thread) {
454 #define BEFORE_EXIT_NOT_RUN 0
455 #define BEFORE_EXIT_RUNNING 1
456 #define BEFORE_EXIT_DONE 2
457 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
458
459 // Note: don't use a Mutex to guard the entire before_exit(), as
460 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
461 // A CAS or OSMutex would work just fine but then we need to manipulate
462 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
463 // for synchronization.
464 { MutexLocker ml(BeforeExit_lock);
465 switch (_before_exit_status) {
466 case BEFORE_EXIT_NOT_RUN:
467 _before_exit_status = BEFORE_EXIT_RUNNING;
468 break;
469 case BEFORE_EXIT_RUNNING:
470 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
471 BeforeExit_lock->wait();
472 }
473 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
474 return;
475 case BEFORE_EXIT_DONE:
476 return;
477 }
478 }
479
480 // The only difference between this and Win32's _onexit procs is that
481 // this version is invoked before any threads get killed.
482 ExitProc* current = exit_procs;
483 while (current != NULL) {
484 ExitProc* next = current->next();
485 current->evaluate();
486 delete current;
487 current = next;
488 }
489
490 // Hang forever on exit if we're reporting an error.
491 if (ShowMessageBoxOnError && is_error_reported()) {
492 os::infinite_sleep();
493 }
494
495 // Terminate watcher thread - must before disenrolling any periodic task
496 if (PeriodicTask::num_tasks() > 0)
497 WatcherThread::stop();
498
499 // Print statistics gathered (profiling ...)
500 if (Arguments::has_profile()) {
501 FlatProfiler::disengage();
502 FlatProfiler::print(10);
503 }
504
505 // shut down the StatSampler task
506 StatSampler::disengage();
507 StatSampler::destroy();
508
509 // Stop concurrent GC threads
510 Universe::heap()->stop();
511
512 // Print GC/heap related information.
513 if (PrintGCDetails) {
514 Universe::print();
515 AdaptiveSizePolicyOutput(0);
516 if (Verbose) {
517 ClassLoaderDataGraph::dump_on(gclog_or_tty);
518 }
519 }
520
521 if (PrintBytecodeHistogram) {
522 BytecodeHistogram::print();
523 }
524
525 if (JvmtiExport::should_post_thread_life()) {
526 JvmtiExport::post_thread_end(thread);
527 }
528
529
530 #if INCLUDE_JFR
531 EventThreadEnd event;
532 if (event.should_commit()) {
533 event.set_thread(JFR_THREAD_ID(thread));
534 event.commit();
535 }
536 #endif
537
538 JFR_ONLY(Jfr::on_vm_shutdown();)
539
540 // Always call even when there are not JVMTI environments yet, since environments
541 // may be attached late and JVMTI must track phases of VM execution
542 JvmtiExport::post_vm_death();
543 Threads::shutdown_vm_agents();
544
545 // Terminate the signal thread
546 // Note: we don't wait until it actually dies.
547 os::terminate_signal_thread();
548
549 print_statistics();
550 Universe::heap()->print_tracing_info();
551
552 { MutexLocker ml(BeforeExit_lock);
553 _before_exit_status = BEFORE_EXIT_DONE;
554 BeforeExit_lock->notify_all();
555 }
556
557 if (VerifyStringTableAtExit) {
558 int fail_cnt = 0;
559 {
560 MutexLocker ml(StringTable_lock);
561 fail_cnt = StringTable::verify_and_compare_entries();
562 }
563
564 if (fail_cnt != 0) {
565 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
566 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
567 }
568 }
569
570 #undef BEFORE_EXIT_NOT_RUN
571 #undef BEFORE_EXIT_RUNNING
572 #undef BEFORE_EXIT_DONE
573 }
574
575 void vm_exit(int code) {
576 Thread* thread = ThreadLocalStorage::is_initialized() ?
577 ThreadLocalStorage::get_thread_slow() : NULL;
578 if (thread == NULL) {
579 // we have serious problems -- just exit
580 vm_direct_exit(code);
581 }
582
583 if (VMThread::vm_thread() != NULL) {
584 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
585 VM_Exit op(code);
586 if (thread->is_Java_thread())
587 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
588 VMThread::execute(&op);
589 // should never reach here; but in case something wrong with VM Thread.
590 vm_direct_exit(code);
591 } else {
592 // VM thread is gone, just exit
593 vm_direct_exit(code);
594 }
595 ShouldNotReachHere();
596 }
597
598 void notify_vm_shutdown() {
599 // For now, just a dtrace probe.
600 #ifndef USDT2
601 HS_DTRACE_PROBE(hotspot, vm__shutdown);
602 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
603 #else /* USDT2 */
604 HOTSPOT_VM_SHUTDOWN();
605 #endif /* USDT2 */
606 }
607
608 void vm_direct_exit(int code) {
609 notify_vm_shutdown();
610 os::wait_for_keypress_at_exit();
611 ::exit(code);
612 }
613
614 void vm_perform_shutdown_actions() {
615 // Warning: do not call 'exit_globals()' here. All threads are still running.
616 // Calling 'exit_globals()' will disable thread-local-storage and cause all
617 // kinds of assertions to trigger in debug mode.
618 if (is_init_completed()) {
619 Thread* thread = ThreadLocalStorage::is_initialized() ?
620 ThreadLocalStorage::get_thread_slow() : NULL;
621 if (thread != NULL && thread->is_Java_thread()) {
622 // We are leaving the VM, set state to native (in case any OS exit
623 // handlers call back to the VM)
624 JavaThread* jt = (JavaThread*)thread;
625 // Must always be walkable or have no last_Java_frame when in
626 // thread_in_native
627 jt->frame_anchor()->make_walkable(jt);
628 jt->set_thread_state(_thread_in_native);
629 }
630 }
631 notify_vm_shutdown();
632 }
633
634 void vm_shutdown()
635 {
636 vm_perform_shutdown_actions();
637 os::wait_for_keypress_at_exit();
638 os::shutdown();
639 }
640
641 void vm_abort(bool dump_core) {
642 vm_perform_shutdown_actions();
643 os::wait_for_keypress_at_exit();
644 os::abort(dump_core);
645 ShouldNotReachHere();
646 }
647
648 void vm_notify_during_shutdown(const char* error, const char* message) {
649 if (error != NULL) {
650 tty->print_cr("Error occurred during initialization of VM");
651 tty->print("%s", error);
652 if (message != NULL) {
653 tty->print_cr(": %s", message);
654 }
655 else {
656 tty->cr();
657 }
658 }
659 if (ShowMessageBoxOnError && WizardMode) {
660 fatal("Error occurred during initialization of VM");
661 }
662 }
663
664 void vm_exit_during_initialization(Handle exception) {
665 tty->print_cr("Error occurred during initialization of VM");
666 // If there are exceptions on this thread it must be cleared
667 // first and here. Any future calls to EXCEPTION_MARK requires
668 // that no pending exceptions exist.
669 Thread *THREAD = Thread::current();
670 if (HAS_PENDING_EXCEPTION) {
671 CLEAR_PENDING_EXCEPTION;
672 }
673 java_lang_Throwable::print(exception, tty);
674 tty->cr();
675 java_lang_Throwable::print_stack_trace(exception(), tty);
676 tty->cr();
677 vm_notify_during_shutdown(NULL, NULL);
678
679 // Failure during initialization, we don't want to dump core
680 vm_abort(false);
681 }
682
683 void vm_exit_during_initialization(Symbol* ex, const char* message) {
684 ResourceMark rm;
685 vm_notify_during_shutdown(ex->as_C_string(), message);
686
687 // Failure during initialization, we don't want to dump core
688 vm_abort(false);
689 }
690
691 void vm_exit_during_initialization(const char* error, const char* message) {
692 vm_notify_during_shutdown(error, message);
693
694 // Failure during initialization, we don't want to dump core
695 vm_abort(false);
696 }
697
698 void vm_shutdown_during_initialization(const char* error, const char* message) {
699 vm_notify_during_shutdown(error, message);
700 vm_shutdown();
701 }
702
703 JDK_Version JDK_Version::_current;
704 const char* JDK_Version::_runtime_name;
705 const char* JDK_Version::_runtime_version;
706
707 void JDK_Version::initialize() {
708 jdk_version_info info;
709 assert(!_current.is_valid(), "Don't initialize twice");
710
711 void *lib_handle = os::native_java_library();
712 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
713 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
714
715 if (func == NULL) {
716 // JDK older than 1.6
717 _current._partially_initialized = true;
718 } else {
719 (*func)(&info, sizeof(info));
720
721 int major = JDK_VERSION_MAJOR(info.jdk_version);
722 int minor = JDK_VERSION_MINOR(info.jdk_version);
723 int micro = JDK_VERSION_MICRO(info.jdk_version);
724 int build = JDK_VERSION_BUILD(info.jdk_version);
725 if (major == 1 && minor > 4) {
726 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
727 major = minor;
728 minor = micro;
729 micro = 0;
730 }
731 _current = JDK_Version(major, minor, micro, info.update_version,
732 info.special_update_version, build,
733 info.thread_park_blocker == 1,
734 info.post_vm_init_hook_enabled == 1,
735 info.pending_list_uses_discovered_field == 1);
736 }
737 }
738
739 void JDK_Version::fully_initialize(
740 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
741 // This is only called when current is less than 1.6 and we've gotten
742 // far enough in the initialization to determine the exact version.
743 assert(major < 6, "not needed for JDK version >= 6");
744 assert(is_partially_initialized(), "must not initialize");
745 if (major < 5) {
746 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
747 micro = minor;
748 minor = major;
749 major = 1;
750 }
751 _current = JDK_Version(major, minor, micro, update);
752 }
753
754 void JDK_Version_init() {
755 JDK_Version::initialize();
756 }
757
758 static int64_t encode_jdk_version(const JDK_Version& v) {
759 return
760 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
761 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
762 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
763 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
764 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
765 ((int64_t)v.build_number() << (BitsPerByte * 0));
766 }
767
768 int JDK_Version::compare(const JDK_Version& other) const {
769 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
770 if (!is_partially_initialized() && other.is_partially_initialized()) {
771 return -(other.compare(*this)); // flip the comparators
772 }
773 assert(!other.is_partially_initialized(), "Not initialized yet");
774 if (is_partially_initialized()) {
775 assert(other.major_version() >= 6,
776 "Invalid JDK version comparison during initialization");
777 return -1;
778 } else {
779 uint64_t e = encode_jdk_version(*this);
780 uint64_t o = encode_jdk_version(other);
781 return (e > o) ? 1 : ((e == o) ? 0 : -1);
782 }
783 }
784
785 void JDK_Version::to_string(char* buffer, size_t buflen) const {
786 assert(buffer && buflen > 0, "call with useful buffer");
787 size_t index = 0;
788 if (!is_valid()) {
789 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
790 } else if (is_partially_initialized()) {
791 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
792 } else {
793 int rc = jio_snprintf(
794 &buffer[index], buflen - index, "%d.%d", _major, _minor);
795 if (rc == -1) return;
796 index += rc;
797 if (_micro > 0) {
798 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
799 if (rc == -1) return;
800 index += rc;
801 }
802 if (_update > 0) {
803 rc = jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
804 if (rc == -1) return;
805 index += rc;
806 }
807 if (_special > 0) {
808 rc = jio_snprintf(&buffer[index], buflen - index, "%c", _special);
809 if (rc == -1) return;
810 index += rc;
811 }
812 if (_build > 0) {
813 rc = jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
814 if (rc == -1) return;
815 index += rc;
816 }
817 }
818 }