1 /*
2 * Copyright (c) 1997, 2014, 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/stringTable.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/memReporter.hpp"
61 #include "services/memTracker.hpp"
62 #include "trace/tracing.hpp"
63 #include "utilities/dtrace.hpp"
64 #include "utilities/globalDefinitions.hpp"
65 #include "utilities/histogram.hpp"
66 #include "utilities/macros.hpp"
67 #include "utilities/vmError.hpp"
68 #if INCLUDE_ALL_GCS
69 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
70 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
71 #include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
72 #endif // INCLUDE_ALL_GCS
73 #ifdef COMPILER1
74 #include "c1/c1_Compiler.hpp"
75 #include "c1/c1_Runtime1.hpp"
76 #endif
77 #ifdef COMPILER2
78 #include "code/compiledIC.hpp"
79 #include "compiler/methodLiveness.hpp"
80 #include "opto/compile.hpp"
81 #include "opto/indexSet.hpp"
82 #include "opto/runtime.hpp"
83 #endif
84
85 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
86
87 GrowableArray<Method*>* collected_profiled_methods;
88
89 int compare_methods(Method** a, Method** b) {
90 // %%% there can be 32-bit overflow here
91 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
92 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
93 }
94
95 void collect_profiled_methods(Method* m) {
96 Thread* thread = Thread::current();
97 // This HandleMark prevents a huge amount of handles from being added
98 // to the metadata_handles() array on the thread.
99 HandleMark hm(thread);
100 methodHandle mh(thread, m);
101 if ((m->method_data() != NULL) &&
102 (PrintMethodData || CompilerOracle::should_print(mh))) {
103 collected_profiled_methods->push(m);
104 }
105 }
106
107 void print_method_profiling_data() {
108 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
109 (PrintMethodData || CompilerOracle::should_print_methods())) {
110 ResourceMark rm;
111 HandleMark hm;
112 collected_profiled_methods = new GrowableArray<Method*>(1024);
113 ClassLoaderDataGraph::methods_do(collect_profiled_methods);
114 collected_profiled_methods->sort(&compare_methods);
115
116 int count = collected_profiled_methods->length();
117 int total_size = 0;
118 if (count > 0) {
119 for (int index = 0; index < count; index++) {
120 Method* m = collected_profiled_methods->at(index);
121 ttyLocker ttyl;
122 tty->print_cr("------------------------------------------------------------------------");
123 m->print_invocation_count();
124 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
125 tty->cr();
126 // Dump data on parameters if any
127 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
128 tty->fill_to(2);
129 m->method_data()->parameters_type_data()->print_data_on(tty);
130 }
131 m->print_codes();
132 total_size += m->method_data()->size_in_bytes();
133 }
134 tty->print_cr("------------------------------------------------------------------------");
135 tty->print_cr("Total MDO size: %d bytes", total_size);
136 }
137 }
138 }
139
140
141 #ifndef PRODUCT
142
143 // Statistics printing (method invocation histogram)
144
145 GrowableArray<Method*>* collected_invoked_methods;
146
147 void collect_invoked_methods(Method* m) {
148 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
149 collected_invoked_methods->push(m);
150 }
151 }
152
153
154
155
156 void print_method_invocation_histogram() {
157 ResourceMark rm;
158 HandleMark hm;
159 collected_invoked_methods = new GrowableArray<Method*>(1024);
160 SystemDictionary::methods_do(collect_invoked_methods);
161 collected_invoked_methods->sort(&compare_methods);
162 //
163 tty->cr();
164 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
165 tty->cr();
166 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
167 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
168 synch_total = 0, nativ_total = 0, acces_total = 0;
169 for (int index = 0; index < collected_invoked_methods->length(); index++) {
170 Method* m = collected_invoked_methods->at(index);
171 int c = m->invocation_count() + m->compiled_invocation_count();
172 if (c >= MethodHistogramCutoff) m->print_invocation_count();
173 int_total += m->invocation_count();
174 comp_total += m->compiled_invocation_count();
175 if (m->is_final()) final_total += c;
176 if (m->is_static()) static_total += c;
177 if (m->is_synchronized()) synch_total += c;
178 if (m->is_native()) nativ_total += c;
179 if (m->is_accessor()) acces_total += c;
180 }
181 tty->cr();
182 total = int_total + comp_total;
183 tty->print_cr("Invocations summary:");
184 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
185 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
186 tty->print_cr("\t%9d (100%%) total", total);
187 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
188 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
189 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
190 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
191 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
192 tty->cr();
193 SharedRuntime::print_call_statistics(comp_total);
194 }
195
196 void print_bytecode_count() {
197 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
198 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
199 }
200 }
201
202 AllocStats alloc_stats;
203
204
205
206 // General statistics printing (profiling ...)
207 void print_statistics() {
208 #ifdef ASSERT
209
210 if (CountRuntimeCalls) {
211 extern Histogram *RuntimeHistogram;
212 RuntimeHistogram->print();
213 }
214
215 if (CountJNICalls) {
216 extern Histogram *JNIHistogram;
217 JNIHistogram->print();
218 }
219
220 if (CountJVMCalls) {
221 extern Histogram *JVMHistogram;
222 JVMHistogram->print();
223 }
224
225 #endif
226
227 if (MemProfiling) {
228 MemProfiler::disengage();
229 }
230
231 if (CITime) {
232 CompileBroker::print_times();
233 }
234
235 #ifdef COMPILER1
236 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
237 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
238 Runtime1::print_statistics();
239 Deoptimization::print_statistics();
240 SharedRuntime::print_statistics();
241 nmethod::print_statistics();
242 }
243 #endif /* COMPILER1 */
244
245 #ifdef COMPILER2
246 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
247 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
248 Compile::print_statistics();
249 #ifndef COMPILER1
250 Deoptimization::print_statistics();
251 nmethod::print_statistics();
252 SharedRuntime::print_statistics();
253 #endif //COMPILER1
254 os::print_statistics();
255 }
256
257 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
258 OptoRuntime::print_named_counters();
259 }
260
261 if (TimeLivenessAnalysis) {
262 MethodLiveness::print_times();
263 }
264 #ifdef ASSERT
265 if (CollectIndexSetStatistics) {
266 IndexSet::print_statistics();
267 }
268 #endif // ASSERT
269 #endif // COMPILER2
270 if (CountCompiledCalls) {
271 print_method_invocation_histogram();
272 }
273
274 print_method_profiling_data();
275
276 if (TimeCompiler) {
277 COMPILER2_PRESENT(Compile::print_timers();)
278 }
279 if (TimeCompilationPolicy) {
280 CompilationPolicy::policy()->print_time();
281 }
282 if (TimeOopMap) {
283 GenerateOopMap::print_time();
284 }
285 if (ProfilerCheckIntervals) {
286 PeriodicTask::print_intervals();
287 }
288 if (PrintSymbolTableSizeHistogram) {
289 SymbolTable::print_histogram();
290 }
291 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
292 BytecodeCounter::print();
293 }
294 if (PrintBytecodePairHistogram) {
295 BytecodePairHistogram::print();
296 }
297
298 if (PrintCodeCache) {
299 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
300 CodeCache::print();
301 }
302
303 if (PrintMethodFlushingStatistics) {
304 NMethodSweeper::print();
305 }
306
307 if (PrintCodeCache2) {
308 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
309 CodeCache::print_internals();
310 }
311
312 if (PrintClassStatistics) {
313 SystemDictionary::print_class_statistics();
314 }
315 if (PrintMethodStatistics) {
316 SystemDictionary::print_method_statistics();
317 }
318
319 if (PrintVtableStats) {
320 klassVtable::print_statistics();
321 klassItable::print_statistics();
322 }
323 if (VerifyOops) {
324 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
325 }
326
327 print_bytecode_count();
328 if (PrintMallocStatistics) {
329 tty->print("allocation stats: ");
330 alloc_stats.print();
331 tty->cr();
332 }
333
334 if (PrintSystemDictionaryAtExit) {
335 SystemDictionary::print();
336 }
337
338 if (PrintBiasedLockingStatistics) {
339 BiasedLocking::print_counters();
340 }
341
342 #ifdef ENABLE_ZAP_DEAD_LOCALS
343 #ifdef COMPILER2
344 if (ZapDeadCompiledLocals) {
345 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
346 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
347 }
348 #endif // COMPILER2
349 #endif // ENABLE_ZAP_DEAD_LOCALS
350 // Native memory tracking data
351 if (PrintNMTStatistics) {
352 if (MemTracker::is_on()) {
353 BaselineTTYOutputer outputer(tty);
354 MemTracker::print_memory_usage(outputer, K, false);
355 } else {
356 tty->print_cr("%s", MemTracker::reason());
357 }
358 }
359 }
360
361 #else // PRODUCT MODE STATISTICS
362
363 void print_statistics() {
364
365 if (PrintMethodData) {
366 print_method_profiling_data();
367 }
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 if (PrintMethodFlushingStatistics) {
379 NMethodSweeper::print();
380 }
381
382 #ifdef COMPILER2
383 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
384 OptoRuntime::print_named_counters();
385 }
386 #endif
387 if (PrintBiasedLockingStatistics) {
388 BiasedLocking::print_counters();
389 }
390
391 // Native memory tracking data
392 if (PrintNMTStatistics) {
393 if (MemTracker::is_on()) {
394 BaselineTTYOutputer outputer(tty);
395 MemTracker::print_memory_usage(outputer, K, false);
396 } else {
397 tty->print_cr("%s", MemTracker::reason());
398 }
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 int volatile vm_getting_terminated = 0;
445
446 // Note: before_exit() can be executed only once, if more than one threads
447 // are trying to shutdown the VM at the same time, only one thread
448 // can run before_exit() and all other threads must wait.
449 void before_exit(JavaThread * thread) {
450 #define BEFORE_EXIT_NOT_RUN 0
451 #define BEFORE_EXIT_RUNNING 1
452 #define BEFORE_EXIT_DONE 2
453 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
454
455 // Note: don't use a Mutex to guard the entire before_exit(), as
456 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
457 // A CAS or OSMutex would work just fine but then we need to manipulate
458 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
459 // for synchronization.
460 { MutexLocker ml(BeforeExit_lock);
461 switch (_before_exit_status) {
462 case BEFORE_EXIT_NOT_RUN:
463 _before_exit_status = BEFORE_EXIT_RUNNING;
464 break;
465 case BEFORE_EXIT_RUNNING:
466 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
467 BeforeExit_lock->wait();
468 }
469 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
470 return;
471 case BEFORE_EXIT_DONE:
472 return;
473 }
474 }
475
476 vm_getting_terminated = 1;
477
478 // The only difference between this and Win32's _onexit procs is that
479 // this version is invoked before any threads get killed.
480 ExitProc* current = exit_procs;
481 while (current != NULL) {
482 ExitProc* next = current->next();
483 current->evaluate();
484 delete current;
485 current = next;
486 }
487
488 // Hang forever on exit if we're reporting an error.
489 if (ShowMessageBoxOnError && is_error_reported()) {
490 os::infinite_sleep();
491 }
492
493 // Terminate watcher thread - must before disenrolling any periodic task
494 if (PeriodicTask::num_tasks() > 0)
495 WatcherThread::stop();
496
497 // Print statistics gathered (profiling ...)
498 if (Arguments::has_profile()) {
499 FlatProfiler::disengage();
500 FlatProfiler::print(10);
501 }
502
503 // shut down the StatSampler task
504 StatSampler::disengage();
505 StatSampler::destroy();
506
507 // Stop concurrent GC threads
508 Universe::heap()->stop();
509
510 // Print GC/heap related information.
511 if (PrintGCDetails) {
512 Universe::print();
513 AdaptiveSizePolicyOutput(0);
514 if (Verbose) {
515 ClassLoaderDataGraph::dump_on(gclog_or_tty);
516 }
517 }
518
519 if (PrintBytecodeHistogram) {
520 BytecodeHistogram::print();
521 }
522
523 if (JvmtiExport::should_post_thread_life()) {
524 JvmtiExport::post_thread_end(thread);
525 }
526
527
528 EventThreadEnd event;
529 if (event.should_commit()) {
530 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
531 event.commit();
532 }
533
534 // Always call even when there are not JVMTI environments yet, since environments
535 // may be attached late and JVMTI must track phases of VM execution
536 JvmtiExport::post_vm_death();
537 Threads::shutdown_vm_agents();
538
539 // Terminate the signal thread
540 // Note: we don't wait until it actually dies.
541 os::terminate_signal_thread();
542
543 print_statistics();
544 Universe::heap()->print_tracing_info();
545
546 { MutexLocker ml(BeforeExit_lock);
547 _before_exit_status = BEFORE_EXIT_DONE;
548 BeforeExit_lock->notify_all();
549 }
550
551 // Shutdown NMT before exit. Otherwise,
552 // it will run into trouble when system destroys static variables.
553 MemTracker::shutdown(MemTracker::NMT_normal);
554
555 if (VerifyStringTableAtExit) {
556 int fail_cnt = 0;
557 {
558 MutexLocker ml(StringTable_lock);
559 fail_cnt = StringTable::verify_and_compare_entries();
560 }
561
562 if (fail_cnt != 0) {
563 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
564 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
565 }
566 }
567
568 #undef BEFORE_EXIT_NOT_RUN
569 #undef BEFORE_EXIT_RUNNING
570 #undef BEFORE_EXIT_DONE
571 }
572
573 void vm_exit(int code) {
574 Thread* thread = ThreadLocalStorage::is_initialized() ?
575 ThreadLocalStorage::get_thread_slow() : NULL;
576 if (thread == NULL) {
577 // we have serious problems -- just exit
578 vm_direct_exit(code);
579 }
580
581 if (VMThread::vm_thread() != NULL) {
582 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
583 VM_Exit op(code);
584 if (thread->is_Java_thread())
585 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
586 VMThread::execute(&op);
587 // should never reach here; but in case something wrong with VM Thread.
588 vm_direct_exit(code);
589 } else {
590 // VM thread is gone, just exit
591 vm_direct_exit(code);
592 }
593 ShouldNotReachHere();
594 }
595
596 void notify_vm_shutdown() {
597 // For now, just a dtrace probe.
598 HOTSPOT_VM_SHUTDOWN();
599 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
600 }
601
602 void vm_direct_exit(int code) {
603 notify_vm_shutdown();
604 os::wait_for_keypress_at_exit();
605 ::exit(code);
606 }
607
608 void vm_perform_shutdown_actions() {
609 // Warning: do not call 'exit_globals()' here. All threads are still running.
610 // Calling 'exit_globals()' will disable thread-local-storage and cause all
611 // kinds of assertions to trigger in debug mode.
612 if (is_init_completed()) {
613 Thread* thread = ThreadLocalStorage::is_initialized() ?
614 ThreadLocalStorage::get_thread_slow() : NULL;
615 if (thread != NULL && thread->is_Java_thread()) {
616 // We are leaving the VM, set state to native (in case any OS exit
617 // handlers call back to the VM)
618 JavaThread* jt = (JavaThread*)thread;
619 // Must always be walkable or have no last_Java_frame when in
620 // thread_in_native
621 jt->frame_anchor()->make_walkable(jt);
622 jt->set_thread_state(_thread_in_native);
623 }
624 }
625 notify_vm_shutdown();
626 }
627
628 void vm_shutdown()
629 {
630 vm_perform_shutdown_actions();
631 os::wait_for_keypress_at_exit();
632 os::shutdown();
633 }
634
635 void vm_abort(bool dump_core) {
636 vm_perform_shutdown_actions();
637 os::wait_for_keypress_at_exit();
638 os::abort(dump_core);
639 ShouldNotReachHere();
640 }
641
642 void vm_notify_during_shutdown(const char* error, const char* message) {
643 if (error != NULL) {
644 tty->print_cr("Error occurred during initialization of VM");
645 tty->print("%s", error);
646 if (message != NULL) {
647 tty->print_cr(": %s", message);
648 }
649 else {
650 tty->cr();
651 }
652 }
653 if (ShowMessageBoxOnError && WizardMode) {
654 fatal("Error occurred during initialization of VM");
655 }
656 }
657
658 void vm_exit_during_initialization(Handle exception) {
659 tty->print_cr("Error occurred during initialization of VM");
660 // If there are exceptions on this thread it must be cleared
661 // first and here. Any future calls to EXCEPTION_MARK requires
662 // that no pending exceptions exist.
663 Thread *THREAD = Thread::current();
664 if (HAS_PENDING_EXCEPTION) {
665 CLEAR_PENDING_EXCEPTION;
666 }
667 java_lang_Throwable::print(exception, tty);
668 tty->cr();
669 java_lang_Throwable::print_stack_trace(exception(), tty);
670 tty->cr();
671 vm_notify_during_shutdown(NULL, NULL);
672
673 // Failure during initialization, we don't want to dump core
674 vm_abort(false);
675 }
676
677 void vm_exit_during_initialization(Symbol* ex, const char* message) {
678 ResourceMark rm;
679 vm_notify_during_shutdown(ex->as_C_string(), message);
680
681 // Failure during initialization, we don't want to dump core
682 vm_abort(false);
683 }
684
685 void vm_exit_during_initialization(const char* error, const char* message) {
686 vm_notify_during_shutdown(error, message);
687
688 // Failure during initialization, we don't want to dump core
689 vm_abort(false);
690 }
691
692 void vm_shutdown_during_initialization(const char* error, const char* message) {
693 vm_notify_during_shutdown(error, message);
694 vm_shutdown();
695 }
696
697 JDK_Version JDK_Version::_current;
698 const char* JDK_Version::_runtime_name;
699 const char* JDK_Version::_runtime_version;
700
701 void JDK_Version::initialize() {
702 jdk_version_info info;
703 assert(!_current.is_valid(), "Don't initialize twice");
704
705 void *lib_handle = os::native_java_library();
706 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
707 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
708
709 if (func == NULL) {
710 // JDK older than 1.6
711 _current._partially_initialized = true;
712 } else {
713 (*func)(&info, sizeof(info));
714
715 int major = JDK_VERSION_MAJOR(info.jdk_version);
716 int minor = JDK_VERSION_MINOR(info.jdk_version);
717 int micro = JDK_VERSION_MICRO(info.jdk_version);
718 int build = JDK_VERSION_BUILD(info.jdk_version);
719 if (major == 1 && minor > 4) {
720 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
721 major = minor;
722 minor = micro;
723 micro = 0;
724 }
725 _current = JDK_Version(major, minor, micro, info.update_version,
726 info.special_update_version, build,
727 info.thread_park_blocker == 1,
728 info.post_vm_init_hook_enabled == 1,
729 info.pending_list_uses_discovered_field == 1);
730 }
731 }
732
733 void JDK_Version::fully_initialize(
734 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
735 // This is only called when current is less than 1.6 and we've gotten
736 // far enough in the initialization to determine the exact version.
737 assert(major < 6, "not needed for JDK version >= 6");
738 assert(is_partially_initialized(), "must not initialize");
739 if (major < 5) {
740 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
741 micro = minor;
742 minor = major;
743 major = 1;
744 }
745 _current = JDK_Version(major, minor, micro, update);
746 }
747
748 void JDK_Version_init() {
749 JDK_Version::initialize();
750 }
751
752 static int64_t encode_jdk_version(const JDK_Version& v) {
753 return
754 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
755 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
756 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
757 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
758 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
759 ((int64_t)v.build_number() << (BitsPerByte * 0));
760 }
761
762 int JDK_Version::compare(const JDK_Version& other) const {
763 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
764 if (!is_partially_initialized() && other.is_partially_initialized()) {
765 return -(other.compare(*this)); // flip the comparators
766 }
767 assert(!other.is_partially_initialized(), "Not initialized yet");
768 if (is_partially_initialized()) {
769 assert(other.major_version() >= 6,
770 "Invalid JDK version comparison during initialization");
771 return -1;
772 } else {
773 uint64_t e = encode_jdk_version(*this);
774 uint64_t o = encode_jdk_version(other);
775 return (e > o) ? 1 : ((e == o) ? 0 : -1);
776 }
777 }
778
779 void JDK_Version::to_string(char* buffer, size_t buflen) const {
780 size_t index = 0;
781 if (!is_valid()) {
782 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
783 } else if (is_partially_initialized()) {
784 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
785 } else {
786 index += jio_snprintf(
787 &buffer[index], buflen - index, "%d.%d", _major, _minor);
788 if (_micro > 0) {
789 index += jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
790 }
791 if (_update > 0) {
792 index += jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
793 }
794 if (_special > 0) {
795 index += jio_snprintf(&buffer[index], buflen - index, "%c", _special);
796 }
797 if (_build > 0) {
798 index += jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
799 }
800 }
801 }