1 /*
2 * Copyright (c) 1997, 2012, 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 #include "memory/genCollectedHeap.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.hpp"
36 #include "oops/constantPool.hpp"
37 #include "oops/generateOopMap.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceOop.hpp"
40 #include "oops/method.hpp"
41 #include "oops/objArrayOop.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/symbol.hpp"
44 #include "prims/jvmtiExport.hpp"
45 #include "runtime/aprofiler.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/biasedLocking.hpp"
48 #include "runtime/compilationPolicy.hpp"
49 #include "runtime/fprofiler.hpp"
50 #include "runtime/init.hpp"
51 #include "runtime/interfaceSupport.hpp"
52 #include "runtime/java.hpp"
53 #include "runtime/memprofiler.hpp"
54 #include "runtime/sharedRuntime.hpp"
55 #include "runtime/statSampler.hpp"
56 #include "runtime/task.hpp"
57 #include "runtime/thread.inline.hpp"
58 #include "runtime/timer.hpp"
59 #include "runtime/vm_operations.hpp"
60 #include "services/memReporter.hpp"
61 #include "services/memTracker.hpp"
62 #include "trace/tracing.hpp"
63 #include "trace/traceEventTypes.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/globalDefinitions.hpp"
66 #include "utilities/histogram.hpp"
67 #include "utilities/macros.hpp"
68 #include "utilities/vmError.hpp"
69 #ifdef TARGET_ARCH_x86
70 # include "vm_version_x86.hpp"
71 #endif
72 #ifdef TARGET_ARCH_sparc
73 # include "vm_version_sparc.hpp"
74 #endif
75 #ifdef TARGET_ARCH_zero
76 # include "vm_version_zero.hpp"
77 #endif
78 #ifdef TARGET_ARCH_arm
79 # include "vm_version_arm.hpp"
80 #endif
81 #ifdef TARGET_ARCH_ppc
82 # include "vm_version_ppc.hpp"
83 #endif
84 #if INCLUDE_ALL_GCS
85 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
86 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
87 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
88 #endif // INCLUDE_ALL_GCS
89 #ifdef COMPILER1
90 #include "c1/c1_Compiler.hpp"
91 #include "c1/c1_Runtime1.hpp"
92 #endif
93 #ifdef COMPILER2
94 #include "code/compiledIC.hpp"
95 #include "compiler/methodLiveness.hpp"
96 #include "opto/compile.hpp"
97 #include "opto/indexSet.hpp"
98 #include "opto/runtime.hpp"
99 #endif
100
101 #ifndef USDT2
102 HS_DTRACE_PROBE_DECL(hotspot, vm__shutdown);
103 #endif /* !USDT2 */
104
105 #ifndef PRODUCT
106
107 // Statistics printing (method invocation histogram)
108
109 GrowableArray<Method*>* collected_invoked_methods;
110
111 void collect_invoked_methods(Method* m) {
112 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
113 collected_invoked_methods->push(m);
114 }
115 }
116
117
118 GrowableArray<Method*>* collected_profiled_methods;
119
120 void collect_profiled_methods(Method* m) {
121 Thread* thread = Thread::current();
122 // This HandleMark prevents a huge amount of handles from being added
123 // to the metadata_handles() array on the thread.
124 HandleMark hm(thread);
125 methodHandle mh(thread, m);
126 if ((m->method_data() != NULL) &&
127 (PrintMethodData || CompilerOracle::should_print(mh))) {
128 collected_profiled_methods->push(m);
129 }
130 }
131
132
133 int compare_methods(Method** a, Method** b) {
134 // %%% there can be 32-bit overflow here
135 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
136 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
137 }
138
139
140 void print_method_invocation_histogram() {
141 ResourceMark rm;
142 HandleMark hm;
143 collected_invoked_methods = new GrowableArray<Method*>(1024);
144 SystemDictionary::methods_do(collect_invoked_methods);
145 collected_invoked_methods->sort(&compare_methods);
146 //
147 tty->cr();
148 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
149 tty->cr();
150 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
151 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
152 synch_total = 0, nativ_total = 0, acces_total = 0;
153 for (int index = 0; index < collected_invoked_methods->length(); index++) {
154 Method* m = collected_invoked_methods->at(index);
155 int c = m->invocation_count() + m->compiled_invocation_count();
156 if (c >= MethodHistogramCutoff) m->print_invocation_count();
157 int_total += m->invocation_count();
158 comp_total += m->compiled_invocation_count();
159 if (m->is_final()) final_total += c;
160 if (m->is_static()) static_total += c;
161 if (m->is_synchronized()) synch_total += c;
162 if (m->is_native()) nativ_total += c;
163 if (m->is_accessor()) acces_total += c;
164 }
165 tty->cr();
166 total = int_total + comp_total;
167 tty->print_cr("Invocations summary:");
168 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
169 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
170 tty->print_cr("\t%9d (100%%) total", total);
171 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
172 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
173 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
174 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
175 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
176 tty->cr();
177 SharedRuntime::print_call_statistics(comp_total);
178 }
179
180 void print_method_profiling_data() {
181 ResourceMark rm;
182 HandleMark hm;
183 collected_profiled_methods = new GrowableArray<Method*>(1024);
184 SystemDictionary::methods_do(collect_profiled_methods);
185 collected_profiled_methods->sort(&compare_methods);
186
187 int count = collected_profiled_methods->length();
188 if (count > 0) {
189 for (int index = 0; index < count; index++) {
190 Method* m = collected_profiled_methods->at(index);
191 ttyLocker ttyl;
192 tty->print_cr("------------------------------------------------------------------------");
193 //m->print_name(tty);
194 m->print_invocation_count();
195 tty->cr();
196 m->print_codes();
197 }
198 tty->print_cr("------------------------------------------------------------------------");
199 }
200 }
201
202 void print_bytecode_count() {
203 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
204 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
205 }
206 }
207
208 AllocStats alloc_stats;
209
210
211
212 // General statistics printing (profiling ...)
213
214 void print_statistics() {
215
216 #ifdef ASSERT
217
218 if (CountRuntimeCalls) {
219 extern Histogram *RuntimeHistogram;
220 RuntimeHistogram->print();
221 }
222
223 if (CountJNICalls) {
224 extern Histogram *JNIHistogram;
225 JNIHistogram->print();
226 }
227
228 if (CountJVMCalls) {
229 extern Histogram *JVMHistogram;
230 JVMHistogram->print();
231 }
232
233 #endif
234
235 if (MemProfiling) {
236 MemProfiler::disengage();
237 }
238
239 if (CITime) {
240 CompileBroker::print_times();
241 }
242
243 #ifdef COMPILER1
244 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
245 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
246 Runtime1::print_statistics();
247 Deoptimization::print_statistics();
248 SharedRuntime::print_statistics();
249 nmethod::print_statistics();
250 }
251 #endif /* COMPILER1 */
252
253 #ifdef COMPILER2
254 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
255 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
256 Compile::print_statistics();
257 #ifndef COMPILER1
258 Deoptimization::print_statistics();
259 nmethod::print_statistics();
260 SharedRuntime::print_statistics();
261 #endif //COMPILER1
262 os::print_statistics();
263 }
264
265 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics) {
266 OptoRuntime::print_named_counters();
267 }
268
269 if (TimeLivenessAnalysis) {
270 MethodLiveness::print_times();
271 }
272 #ifdef ASSERT
273 if (CollectIndexSetStatistics) {
274 IndexSet::print_statistics();
275 }
276 #endif // ASSERT
277 #endif // COMPILER2
278 if (CountCompiledCalls) {
279 print_method_invocation_histogram();
280 }
281 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData)) {
282 print_method_profiling_data();
283 }
284 if (TimeCompiler) {
285 COMPILER2_PRESENT(Compile::print_timers();)
286 }
287 if (TimeCompilationPolicy) {
288 CompilationPolicy::policy()->print_time();
289 }
290 if (TimeOopMap) {
291 GenerateOopMap::print_time();
292 }
293 if (ProfilerCheckIntervals) {
294 PeriodicTask::print_intervals();
295 }
296 if (PrintSymbolTableSizeHistogram) {
297 SymbolTable::print_histogram();
298 }
299 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
300 BytecodeCounter::print();
301 }
302 if (PrintBytecodePairHistogram) {
303 BytecodePairHistogram::print();
304 }
305
306 if (PrintCodeCache) {
307 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
308 CodeCache::print();
309 }
310
311 if (PrintCodeCache2) {
312 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
313 CodeCache::print_internals();
314 }
315
316 if (PrintClassStatistics) {
317 SystemDictionary::print_class_statistics();
318 }
319 if (PrintMethodStatistics) {
320 SystemDictionary::print_method_statistics();
321 }
322
323 if (PrintVtableStats) {
324 klassVtable::print_statistics();
325 klassItable::print_statistics();
326 }
327 if (VerifyOops) {
328 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
329 }
330
331 print_bytecode_count();
332 if (PrintMallocStatistics) {
333 tty->print("allocation stats: ");
334 alloc_stats.print();
335 tty->cr();
336 }
337
338 if (PrintSystemDictionaryAtExit) {
339 SystemDictionary::print();
340 }
341
342 if (PrintBiasedLockingStatistics) {
343 BiasedLocking::print_counters();
344 }
345
346 #ifdef ENABLE_ZAP_DEAD_LOCALS
347 #ifdef COMPILER2
348 if (ZapDeadCompiledLocals) {
349 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
350 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
351 }
352 #endif // COMPILER2
353 #endif // ENABLE_ZAP_DEAD_LOCALS
354 // Native memory tracking data
355 if (PrintNMTStatistics) {
356 if (MemTracker::is_on()) {
357 BaselineTTYOutputer outputer(tty);
358 MemTracker::print_memory_usage(outputer, K, false);
359 } else {
360 tty->print_cr(MemTracker::reason());
361 }
362 }
363 }
364
365 #else // PRODUCT MODE STATISTICS
366
367 void print_statistics() {
368
369 if (CITime) {
370 CompileBroker::print_times();
371 }
372
373 if (PrintCodeCache) {
374 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
375 CodeCache::print();
376 }
377
378 #ifdef COMPILER2
379 if (PrintPreciseBiasedLockingStatistics) {
380 OptoRuntime::print_named_counters();
381 }
382 #endif
383 if (PrintBiasedLockingStatistics) {
384 BiasedLocking::print_counters();
385 }
386
387 // Native memory tracking data
388 if (PrintNMTStatistics) {
389 if (MemTracker::is_on()) {
390 BaselineTTYOutputer outputer(tty);
391 MemTracker::print_memory_usage(outputer, K, false);
392 } else {
393 tty->print_cr(MemTracker::reason());
394 }
395 }
396 }
397
398 #endif
399
400
401 // Helper class for registering on_exit calls through JVM_OnExit
402
403 extern "C" {
404 typedef void (*__exit_proc)(void);
405 }
406
407 class ExitProc : public CHeapObj<mtInternal> {
408 private:
409 __exit_proc _proc;
410 // void (*_proc)(void);
411 ExitProc* _next;
412 public:
413 // ExitProc(void (*proc)(void)) {
414 ExitProc(__exit_proc proc) {
415 _proc = proc;
416 _next = NULL;
417 }
418 void evaluate() { _proc(); }
419 ExitProc* next() const { return _next; }
420 void set_next(ExitProc* next) { _next = next; }
421 };
422
423
424 // Linked list of registered on_exit procedures
425
426 static ExitProc* exit_procs = NULL;
427
428
429 extern "C" {
430 void register_on_exit_function(void (*func)(void)) {
431 ExitProc *entry = new ExitProc(func);
432 // Classic vm does not throw an exception in case the allocation failed,
433 if (entry != NULL) {
434 entry->set_next(exit_procs);
435 exit_procs = entry;
436 }
437 }
438 }
439
440 // Note: before_exit() can be executed only once, if more than one threads
441 // are trying to shutdown the VM at the same time, only one thread
442 // can run before_exit() and all other threads must wait.
443 void before_exit(JavaThread * thread) {
444 #define BEFORE_EXIT_NOT_RUN 0
445 #define BEFORE_EXIT_RUNNING 1
446 #define BEFORE_EXIT_DONE 2
447 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
448
449 // Note: don't use a Mutex to guard the entire before_exit(), as
450 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
451 // A CAS or OSMutex would work just fine but then we need to manipulate
452 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
453 // for synchronization.
454 { MutexLocker ml(BeforeExit_lock);
455 switch (_before_exit_status) {
456 case BEFORE_EXIT_NOT_RUN:
457 _before_exit_status = BEFORE_EXIT_RUNNING;
458 break;
459 case BEFORE_EXIT_RUNNING:
460 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
461 BeforeExit_lock->wait();
462 }
463 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
464 return;
465 case BEFORE_EXIT_DONE:
466 return;
467 }
468 }
469
470 // The only difference between this and Win32's _onexit procs is that
471 // this version is invoked before any threads get killed.
472 ExitProc* current = exit_procs;
473 while (current != NULL) {
474 ExitProc* next = current->next();
475 current->evaluate();
476 delete current;
477 current = next;
478 }
479
480 // Hang forever on exit if we're reporting an error.
481 if (ShowMessageBoxOnError && is_error_reported()) {
482 os::infinite_sleep();
483 }
484
485 // Terminate watcher thread - must before disenrolling any periodic task
486 if (PeriodicTask::num_tasks() > 0)
487 WatcherThread::stop();
488
489 // Print statistics gathered (profiling ...)
490 if (Arguments::has_profile()) {
491 FlatProfiler::disengage();
492 FlatProfiler::print(10);
493 }
494
495 // shut down the StatSampler task
496 StatSampler::disengage();
497 StatSampler::destroy();
498
499 // We do not need to explicitly stop concurrent GC threads because the
500 // JVM will be taken down at a safepoint when such threads are inactive --
501 // except for some concurrent G1 threads, see (comment in)
502 // Threads::destroy_vm().
503
504 // Print GC/heap related information.
505 if (PrintGCDetails) {
506 Universe::print();
507 AdaptiveSizePolicyOutput(0);
508 if (Verbose) {
509 ClassLoaderDataGraph::dump_on(gclog_or_tty);
510 }
511 }
512
513
514 if (Arguments::has_alloc_profile()) {
515 HandleMark hm;
516 // Do one last collection to enumerate all the objects
517 // allocated since the last one.
518 Universe::heap()->collect(GCCause::_allocation_profiler);
519 AllocationProfiler::disengage();
520 AllocationProfiler::print(0);
521 }
522
523 if (PrintBytecodeHistogram) {
524 BytecodeHistogram::print();
525 }
526
527 if (JvmtiExport::should_post_thread_life()) {
528 JvmtiExport::post_thread_end(thread);
529 }
530
531 EVENT_BEGIN(TraceEventThreadEnd, event);
532 EVENT_COMMIT(event,
533 EVENT_SET(event, javalangthread, java_lang_Thread::thread_id(thread->threadObj())));
534
535 // Always call even when there are not JVMTI environments yet, since environments
536 // may be attached late and JVMTI must track phases of VM execution
537 JvmtiExport::post_vm_death();
538 Threads::shutdown_vm_agents();
539
540 // Terminate the signal thread
541 // Note: we don't wait until it actually dies.
542 os::terminate_signal_thread();
543
544 print_statistics();
545 Universe::heap()->print_tracing_info();
546
547 { MutexLocker ml(BeforeExit_lock);
548 _before_exit_status = BEFORE_EXIT_DONE;
549 BeforeExit_lock->notify_all();
550 }
551
552 // Shutdown NMT before exit. Otherwise,
553 // it will run into trouble when system destroys static variables.
554 MemTracker::shutdown(MemTracker::NMT_normal);
555
556 #undef BEFORE_EXIT_NOT_RUN
557 #undef BEFORE_EXIT_RUNNING
558 #undef BEFORE_EXIT_DONE
559 }
560
561 void vm_exit(int code) {
562 Thread* thread = ThreadLocalStorage::is_initialized() ?
563 ThreadLocalStorage::get_thread_slow() : NULL;
564 if (thread == NULL) {
565 // we have serious problems -- just exit
566 vm_direct_exit(code);
567 }
568
569 if (VMThread::vm_thread() != NULL) {
570 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
571 VM_Exit op(code);
572 if (thread->is_Java_thread())
573 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
574 VMThread::execute(&op);
575 // should never reach here; but in case something wrong with VM Thread.
576 vm_direct_exit(code);
577 } else {
578 // VM thread is gone, just exit
579 vm_direct_exit(code);
580 }
581 ShouldNotReachHere();
582 }
583
584 void notify_vm_shutdown() {
585 // For now, just a dtrace probe.
586 #ifndef USDT2
587 HS_DTRACE_PROBE(hotspot, vm__shutdown);
588 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
589 #else /* USDT2 */
590 HOTSPOT_VM_SHUTDOWN();
591 #endif /* USDT2 */
592 }
593
594 void vm_direct_exit(int code) {
595 notify_vm_shutdown();
596 os::wait_for_keypress_at_exit();
597 ::exit(code);
598 }
599
600 void vm_perform_shutdown_actions() {
601 // Warning: do not call 'exit_globals()' here. All threads are still running.
602 // Calling 'exit_globals()' will disable thread-local-storage and cause all
603 // kinds of assertions to trigger in debug mode.
604 if (is_init_completed()) {
605 Thread* thread = ThreadLocalStorage::is_initialized() ?
606 ThreadLocalStorage::get_thread_slow() : NULL;
607 if (thread != NULL && thread->is_Java_thread()) {
608 // We are leaving the VM, set state to native (in case any OS exit
609 // handlers call back to the VM)
610 JavaThread* jt = (JavaThread*)thread;
611 // Must always be walkable or have no last_Java_frame when in
612 // thread_in_native
613 jt->frame_anchor()->make_walkable(jt);
614 jt->set_thread_state(_thread_in_native);
615 }
616 }
617 notify_vm_shutdown();
618 }
619
620 void vm_shutdown()
621 {
622 vm_perform_shutdown_actions();
623 os::wait_for_keypress_at_exit();
624 os::shutdown();
625 }
626
627 void vm_abort(bool dump_core) {
628 vm_perform_shutdown_actions();
629 os::wait_for_keypress_at_exit();
630 os::abort(dump_core);
631 ShouldNotReachHere();
632 }
633
634 void vm_notify_during_shutdown(const char* error, const char* message) {
635 if (error != NULL) {
636 tty->print_cr("Error occurred during initialization of VM");
637 tty->print("%s", error);
638 if (message != NULL) {
639 tty->print_cr(": %s", message);
640 }
641 else {
642 tty->cr();
643 }
644 }
645 if (ShowMessageBoxOnError && WizardMode) {
646 fatal("Error occurred during initialization of VM");
647 }
648 }
649
650 void vm_exit_during_initialization(Handle exception) {
651 tty->print_cr("Error occurred during initialization of VM");
652 // If there are exceptions on this thread it must be cleared
653 // first and here. Any future calls to EXCEPTION_MARK requires
654 // that no pending exceptions exist.
655 Thread *THREAD = Thread::current();
656 if (HAS_PENDING_EXCEPTION) {
657 CLEAR_PENDING_EXCEPTION;
658 }
659 java_lang_Throwable::print(exception, tty);
660 tty->cr();
661 java_lang_Throwable::print_stack_trace(exception(), tty);
662 tty->cr();
663 vm_notify_during_shutdown(NULL, NULL);
664
665 // Failure during initialization, we don't want to dump core
666 vm_abort(false);
667 }
668
669 void vm_exit_during_initialization(Symbol* ex, const char* message) {
670 ResourceMark rm;
671 vm_notify_during_shutdown(ex->as_C_string(), message);
672
673 // Failure during initialization, we don't want to dump core
674 vm_abort(false);
675 }
676
677 void vm_exit_during_initialization(const char* error, const char* message) {
678 vm_notify_during_shutdown(error, message);
679
680 // Failure during initialization, we don't want to dump core
681 vm_abort(false);
682 }
683
684 void vm_shutdown_during_initialization(const char* error, const char* message) {
685 vm_notify_during_shutdown(error, message);
686 vm_shutdown();
687 }
688
689 JDK_Version JDK_Version::_current;
690 const char* JDK_Version::_runtime_name;
691 const char* JDK_Version::_runtime_version;
692
693 void JDK_Version::initialize() {
694 jdk_version_info info;
695 assert(!_current.is_valid(), "Don't initialize twice");
696
697 void *lib_handle = os::native_java_library();
698 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
699 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
700
701 if (func == NULL) {
702 // JDK older than 1.6
703 _current._partially_initialized = true;
704 } else {
705 (*func)(&info, sizeof(info));
706
707 int major = JDK_VERSION_MAJOR(info.jdk_version);
708 int minor = JDK_VERSION_MINOR(info.jdk_version);
709 int micro = JDK_VERSION_MICRO(info.jdk_version);
710 int build = JDK_VERSION_BUILD(info.jdk_version);
711 if (major == 1 && minor > 4) {
712 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
713 major = minor;
714 minor = micro;
715 micro = 0;
716 }
717 _current = JDK_Version(major, minor, micro, info.update_version,
718 info.special_update_version, build,
719 info.thread_park_blocker == 1,
720 info.post_vm_init_hook_enabled == 1,
721 info.pending_list_uses_discovered_field == 1);
722 }
723 }
724
725 void JDK_Version::fully_initialize(
726 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
727 // This is only called when current is less than 1.6 and we've gotten
728 // far enough in the initialization to determine the exact version.
729 assert(major < 6, "not needed for JDK version >= 6");
730 assert(is_partially_initialized(), "must not initialize");
731 if (major < 5) {
732 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
733 micro = minor;
734 minor = major;
735 major = 1;
736 }
737 _current = JDK_Version(major, minor, micro, update);
738 }
739
740 void JDK_Version_init() {
741 JDK_Version::initialize();
742 }
743
744 static int64_t encode_jdk_version(const JDK_Version& v) {
745 return
746 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
747 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
748 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
749 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
750 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
751 ((int64_t)v.build_number() << (BitsPerByte * 0));
752 }
753
754 int JDK_Version::compare(const JDK_Version& other) const {
755 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
756 if (!is_partially_initialized() && other.is_partially_initialized()) {
757 return -(other.compare(*this)); // flip the comparators
758 }
759 assert(!other.is_partially_initialized(), "Not initialized yet");
760 if (is_partially_initialized()) {
761 assert(other.major_version() >= 6,
762 "Invalid JDK version comparison during initialization");
763 return -1;
764 } else {
765 uint64_t e = encode_jdk_version(*this);
766 uint64_t o = encode_jdk_version(other);
767 return (e > o) ? 1 : ((e == o) ? 0 : -1);
768 }
769 }
770
771 void JDK_Version::to_string(char* buffer, size_t buflen) const {
772 size_t index = 0;
773 if (!is_valid()) {
774 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
775 } else if (is_partially_initialized()) {
776 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
777 } else {
778 index += jio_snprintf(
779 &buffer[index], buflen - index, "%d.%d", _major, _minor);
780 if (_micro > 0) {
781 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
782 }
783 if (_update > 0) {
784 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
785 }
786 if (_special > 0) {
787 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
788 }
789 if (_build > 0) {
790 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
791 }
792 }
793 }