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