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