1 /*
2 * Copyright (c) 1997, 2018, 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 "jvm.h"
27 #include "aot/aotLoader.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/stringTable.hpp"
30 #include "classfile/systemDictionary.hpp"
31 #include "code/codeCache.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/compilerOracle.hpp"
34 #include "interpreter/bytecodeHistogram.hpp"
35 #include "jfr/jfrEvents.hpp"
36 #include "jfr/support/jfrThreadId.hpp"
37 #if INCLUDE_JVMCI
38 #include "jvmci/jvmciCompiler.hpp"
39 #include "jvmci/jvmciRuntime.hpp"
40 #endif
41 #include "logging/log.hpp"
42 #include "logging/logStream.hpp"
43 #include "memory/oopFactory.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/constantPool.hpp"
47 #include "oops/generateOopMap.hpp"
48 #include "oops/instanceKlass.hpp"
49 #include "oops/instanceOop.hpp"
50 #include "oops/method.hpp"
51 #include "oops/objArrayOop.hpp"
52 #include "oops/oop.inline.hpp"
53 #include "oops/symbol.hpp"
54 #include "prims/jvmtiExport.hpp"
55 #include "runtime/arguments.hpp"
56 #include "runtime/biasedLocking.hpp"
57 #include "runtime/compilationPolicy.hpp"
58 #include "runtime/deoptimization.hpp"
59 #include "runtime/flags/flagSetting.hpp"
60 #include "runtime/init.hpp"
61 #include "runtime/interfaceSupport.inline.hpp"
62 #include "runtime/java.hpp"
63 #include "runtime/memprofiler.hpp"
64 #include "runtime/sharedRuntime.hpp"
65 #include "runtime/statSampler.hpp"
66 #include "runtime/sweeper.hpp"
67 #include "runtime/task.hpp"
68 #include "runtime/thread.inline.hpp"
69 #include "runtime/timer.hpp"
70 #include "runtime/vmOperations.hpp"
71 #include "services/memTracker.hpp"
72 #include "utilities/dtrace.hpp"
73 #include "utilities/globalDefinitions.hpp"
74 #include "utilities/histogram.hpp"
75 #include "utilities/macros.hpp"
76 #include "utilities/vmError.hpp"
77 #ifdef COMPILER1
78 #include "c1/c1_Compiler.hpp"
79 #include "c1/c1_Runtime1.hpp"
80 #endif
81 #ifdef COMPILER2
82 #include "code/compiledIC.hpp"
83 #include "compiler/methodLiveness.hpp"
84 #include "opto/compile.hpp"
85 #include "opto/indexSet.hpp"
86 #include "opto/runtime.hpp"
87 #endif
88 #if INCLUDE_JFR
89 #include "jfr/jfr.hpp"
90 #endif
91
92 GrowableArray<Method*>* collected_profiled_methods;
93
94 int compare_methods(Method** a, Method** b) {
95 // compiled_invocation_count() returns int64_t, forcing the entire expression
96 // to be evaluated as int64_t. Overflow is not an issue.
97 int64_t diff = (((*b)->invocation_count() + (*b)->compiled_invocation_count())
98 - ((*a)->invocation_count() + (*a)->compiled_invocation_count()));
99 return (diff < 0) ? -1 : (diff > 0) ? 1 : 0;
100 }
101
102 void collect_profiled_methods(Method* m) {
103 Thread* thread = Thread::current();
104 methodHandle mh(thread, m);
105 if ((m->method_data() != NULL) &&
106 (PrintMethodData || CompilerOracle::should_print(mh))) {
107 collected_profiled_methods->push(m);
108 }
109 }
110
111 void print_method_profiling_data() {
112 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
113 (PrintMethodData || CompilerOracle::should_print_methods())) {
114 ResourceMark rm;
115 HandleMark hm;
116 collected_profiled_methods = new GrowableArray<Method*>(1024);
117 SystemDictionary::methods_do(collect_profiled_methods);
118 collected_profiled_methods->sort(&compare_methods);
119
120 int count = collected_profiled_methods->length();
121 int total_size = 0;
122 if (count > 0) {
123 for (int index = 0; index < count; index++) {
124 Method* m = collected_profiled_methods->at(index);
125 ttyLocker ttyl;
126 tty->print_cr("------------------------------------------------------------------------");
127 m->print_invocation_count();
128 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
129 tty->cr();
130 // Dump data on parameters if any
131 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
132 tty->fill_to(2);
133 m->method_data()->parameters_type_data()->print_data_on(tty);
134 }
135 m->print_codes();
136 total_size += m->method_data()->size_in_bytes();
137 }
138 tty->print_cr("------------------------------------------------------------------------");
139 tty->print_cr("Total MDO size: %d bytes", total_size);
140 }
141 }
142 }
143
144
145 #ifndef PRODUCT
146
147 // Statistics printing (method invocation histogram)
148
149 GrowableArray<Method*>* collected_invoked_methods;
150
151 void collect_invoked_methods(Method* m) {
152 if (m->invocation_count() + m->compiled_invocation_count() >= 1) {
153 collected_invoked_methods->push(m);
154 }
155 }
156
157
158 // Invocation count accumulators should be unsigned long to shift the
159 // overflow border. Longer-running workloads tend to create invocation
160 // counts which already overflow 32-bit counters for individual methods.
161 void print_method_invocation_histogram() {
162 ResourceMark rm;
163 HandleMark hm;
164 collected_invoked_methods = new GrowableArray<Method*>(1024);
165 SystemDictionary::methods_do(collect_invoked_methods);
166 collected_invoked_methods->sort(&compare_methods);
167 //
168 tty->cr();
169 tty->print_cr("Histogram Over Method Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
170 tty->cr();
171 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
172 uint64_t total = 0,
173 int_total = 0,
174 comp_total = 0,
175 special_total= 0,
176 static_total = 0,
177 final_total = 0,
178 synch_total = 0,
179 native_total = 0,
180 access_total = 0;
181 for (int index = 0; index < collected_invoked_methods->length(); index++) {
182 // Counter values returned from getter methods are signed int.
183 // To shift the overflow border by a factor of two, we interpret
184 // them here as unsigned long. A counter can't be negative anyway.
185 Method* m = collected_invoked_methods->at(index);
186 uint64_t iic = (uint64_t)m->invocation_count();
187 uint64_t cic = (uint64_t)m->compiled_invocation_count();
188 if ((iic + cic) >= (uint64_t)MethodHistogramCutoff) m->print_invocation_count();
189 int_total += iic;
190 comp_total += cic;
191 if (m->is_final()) final_total += iic + cic;
192 if (m->is_static()) static_total += iic + cic;
193 if (m->is_synchronized()) synch_total += iic + cic;
194 if (m->is_native()) native_total += iic + cic;
195 if (m->is_accessor()) access_total += iic + cic;
196 }
197 tty->cr();
198 total = int_total + comp_total;
199 special_total = final_total + static_total +synch_total + native_total + access_total;
200 tty->print_cr("Invocations summary for %d methods:", collected_invoked_methods->length());
201 tty->print_cr("\t" UINT64_FORMAT_W(12) " (100%%) total", total);
202 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- interpreted", int_total, 100.0 * int_total / total);
203 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- compiled", comp_total, 100.0 * comp_total / total);
204 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- special methods (interpreted and compiled)",
205 special_total, 100.0 * special_total/ total);
206 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- synchronized",synch_total, 100.0 * synch_total / total);
207 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- final", final_total, 100.0 * final_total / total);
208 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- static", static_total, 100.0 * static_total / total);
209 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- native", native_total, 100.0 * native_total / total);
210 tty->print_cr("\t" UINT64_FORMAT_W(12) " (%4.1f%%) |- accessor", access_total, 100.0 * access_total / total);
211 tty->cr();
212 SharedRuntime::print_call_statistics(comp_total);
213 }
214
215 void print_bytecode_count() {
216 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
217 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
218 }
219 }
220
221 AllocStats alloc_stats;
222
223
224
225 // General statistics printing (profiling ...)
226 void print_statistics() {
227 #ifdef ASSERT
228
229 if (CountRuntimeCalls) {
230 extern Histogram *RuntimeHistogram;
231 RuntimeHistogram->print();
232 }
233
234 if (CountJNICalls) {
235 extern Histogram *JNIHistogram;
236 JNIHistogram->print();
237 }
238
239 if (CountJVMCalls) {
240 extern Histogram *JVMHistogram;
241 JVMHistogram->print();
242 }
243
244 #endif
245
246 if (MemProfiling) {
247 MemProfiler::disengage();
248 }
249
250 if (CITime) {
251 CompileBroker::print_times();
252 }
253
254 #ifdef COMPILER1
255 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
256 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
257 Runtime1::print_statistics();
258 Deoptimization::print_statistics();
259 SharedRuntime::print_statistics();
260 }
261 #endif /* COMPILER1 */
262
263 #ifdef COMPILER2
264 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
265 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
266 Compile::print_statistics();
267 #ifndef COMPILER1
268 Deoptimization::print_statistics();
269 SharedRuntime::print_statistics();
270 #endif //COMPILER1
271 os::print_statistics();
272 }
273
274 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
275 OptoRuntime::print_named_counters();
276 }
277
278 if (TimeLivenessAnalysis) {
279 MethodLiveness::print_times();
280 }
281 #ifdef ASSERT
282 if (CollectIndexSetStatistics) {
283 IndexSet::print_statistics();
284 }
285 #endif // ASSERT
286 #else // COMPILER2
287 #if INCLUDE_JVMCI
288 #ifndef COMPILER1
289 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
290 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
291 Deoptimization::print_statistics();
292 SharedRuntime::print_statistics();
293 }
294 #endif // COMPILER1
295 #endif // INCLUDE_JVMCI
296 #endif // COMPILER2
297
298 if (PrintAOTStatistics) {
299 AOTLoader::print_statistics();
300 }
301
302 if (PrintNMethodStatistics) {
303 nmethod::print_statistics();
304 }
305 if (CountCompiledCalls) {
306 print_method_invocation_histogram();
307 }
308
309 print_method_profiling_data();
310
311 if (TimeCompilationPolicy) {
312 CompilationPolicy::policy()->print_time();
313 }
314 if (TimeOopMap) {
315 GenerateOopMap::print_time();
316 }
317 if (ProfilerCheckIntervals) {
318 PeriodicTask::print_intervals();
319 }
320 if (PrintSymbolTableSizeHistogram) {
321 SymbolTable::print_histogram();
322 }
323 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
324 BytecodeCounter::print();
325 }
326 if (PrintBytecodePairHistogram) {
327 BytecodePairHistogram::print();
328 }
329
330 if (PrintCodeCache) {
331 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
332 CodeCache::print();
333 }
334
335 // CodeHeap State Analytics.
336 // Does also call NMethodSweeper::print(tty)
337 LogTarget(Trace, codecache) lt;
338 if (lt.is_enabled()) {
339 CompileBroker::print_heapinfo(NULL, "all", 4096); // details
340 } else if (PrintMethodFlushingStatistics) {
341 NMethodSweeper::print(tty);
342 }
343
344 if (PrintCodeCache2) {
345 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
346 CodeCache::print_internals();
347 }
348
349 if (PrintVtableStats) {
350 klassVtable::print_statistics();
351 klassItable::print_statistics();
352 }
353 if (VerifyOops && Verbose) {
354 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
355 }
356
357 print_bytecode_count();
358 if (PrintMallocStatistics) {
359 tty->print("allocation stats: ");
360 alloc_stats.print();
361 tty->cr();
362 }
363
364 if (PrintSystemDictionaryAtExit) {
365 ResourceMark rm;
366 SystemDictionary::print();
367 ClassLoaderDataGraph::print();
368 }
369
370 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
371 Method::print_touched_methods(tty);
372 }
373
374 if (PrintBiasedLockingStatistics) {
375 BiasedLocking::print_counters();
376 }
377
378 // Native memory tracking data
379 if (PrintNMTStatistics) {
380 MemTracker::final_report(tty);
381 }
382
383 ThreadsSMRSupport::log_statistics();
384 }
385
386 #else // PRODUCT MODE STATISTICS
387
388 void print_statistics() {
389
390 if (PrintMethodData) {
391 print_method_profiling_data();
392 }
393
394 if (CITime) {
395 CompileBroker::print_times();
396 }
397
398 if (PrintCodeCache) {
399 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
400 CodeCache::print();
401 }
402
403 // CodeHeap State Analytics.
404 // Does also call NMethodSweeper::print(tty)
405 LogTarget(Trace, codecache) lt;
406 if (lt.is_enabled()) {
407 CompileBroker::print_heapinfo(NULL, "all", 4096); // details
408 } else if (PrintMethodFlushingStatistics) {
409 NMethodSweeper::print(tty);
410 }
411
412 #ifdef COMPILER2
413 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
414 OptoRuntime::print_named_counters();
415 }
416 #endif
417 if (PrintBiasedLockingStatistics) {
418 BiasedLocking::print_counters();
419 }
420
421 // Native memory tracking data
422 if (PrintNMTStatistics) {
423 MemTracker::final_report(tty);
424 }
425
426 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
427 Method::print_touched_methods(tty);
428 }
429
430 ThreadsSMRSupport::log_statistics();
431 }
432
433 #endif
434
435 // Note: before_exit() can be executed only once, if more than one threads
436 // are trying to shutdown the VM at the same time, only one thread
437 // can run before_exit() and all other threads must wait.
438 void before_exit(JavaThread* thread) {
439 #define BEFORE_EXIT_NOT_RUN 0
440 #define BEFORE_EXIT_RUNNING 1
441 #define BEFORE_EXIT_DONE 2
442 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
443
444 // Note: don't use a Mutex to guard the entire before_exit(), as
445 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
446 // A CAS or OSMutex would work just fine but then we need to manipulate
447 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
448 // for synchronization.
449 { MutexLocker ml(BeforeExit_lock);
450 switch (_before_exit_status) {
451 case BEFORE_EXIT_NOT_RUN:
452 _before_exit_status = BEFORE_EXIT_RUNNING;
453 break;
454 case BEFORE_EXIT_RUNNING:
455 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
456 BeforeExit_lock->wait();
457 }
458 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
459 return;
460 case BEFORE_EXIT_DONE:
461 // need block to avoid SS compiler bug
462 {
463 return;
464 }
465 }
466 }
467
468 #if INCLUDE_JVMCI
469 // We are not using CATCH here because we want the exit to continue normally.
470 Thread* THREAD = thread;
471 JVMCIRuntime::shutdown(THREAD);
472 if (HAS_PENDING_EXCEPTION) {
473 HandleMark hm(THREAD);
474 Handle exception(THREAD, PENDING_EXCEPTION);
475 CLEAR_PENDING_EXCEPTION;
476 java_lang_Throwable::java_printStackTrace(exception, THREAD);
477 }
478 #endif
479
480 // Hang forever on exit if we're reporting an error.
481 if (ShowMessageBoxOnError && VMError::is_error_reported()) {
482 os::infinite_sleep();
483 }
484
485 EventThreadEnd event;
486 if (event.should_commit()) {
487 event.set_thread(JFR_THREAD_ID(thread));
488 event.commit();
489 }
490
491 JFR_ONLY(Jfr::on_vm_shutdown();)
492
493 // Stop the WatcherThread. We do this before disenrolling various
494 // PeriodicTasks to reduce the likelihood of races.
495 if (PeriodicTask::num_tasks() > 0) {
496 WatcherThread::stop();
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 Log(gc, heap, exit) log;
508 if (log.is_info()) {
509 ResourceMark rm;
510 LogStream ls_info(log.info());
511 Universe::print_on(&ls_info);
512 if (log.is_trace()) {
513 LogStream ls_trace(log.trace());
514 ClassLoaderDataGraph::print_on(&ls_trace);
515 }
516 }
517
518 if (PrintBytecodeHistogram) {
519 BytecodeHistogram::print();
520 }
521
522 if (JvmtiExport::should_post_thread_life()) {
523 JvmtiExport::post_thread_end(thread);
524 }
525
526 // Always call even when there are not JVMTI environments yet, since environments
527 // may be attached late and JVMTI must track phases of VM execution
528 JvmtiExport::post_vm_death();
529 Threads::shutdown_vm_agents();
530
531 // Terminate the signal thread
532 // Note: we don't wait until it actually dies.
533 os::terminate_signal_thread();
534
535 print_statistics();
536 Universe::heap()->print_tracing_info();
537
538 { MutexLocker ml(BeforeExit_lock);
539 _before_exit_status = BEFORE_EXIT_DONE;
540 BeforeExit_lock->notify_all();
541 }
542
543 if (VerifyStringTableAtExit) {
544 size_t fail_cnt = StringTable::verify_and_compare_entries();
545 if (fail_cnt != 0) {
546 tty->print_cr("ERROR: fail_cnt=" SIZE_FORMAT, fail_cnt);
547 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
548 }
549 }
550
551 #undef BEFORE_EXIT_NOT_RUN
552 #undef BEFORE_EXIT_RUNNING
553 #undef BEFORE_EXIT_DONE
554 }
555
556 void vm_exit(int code) {
557 Thread* thread =
558 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL;
559 if (thread == NULL) {
560 // very early initialization failure -- just exit
561 vm_direct_exit(code);
562 }
563
564 if (VMThread::vm_thread() != NULL) {
565 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
566 VM_Exit op(code);
567 if (thread->is_Java_thread())
568 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
569 VMThread::execute(&op);
570 // should never reach here; but in case something wrong with VM Thread.
571 vm_direct_exit(code);
572 } else {
573 // VM thread is gone, just exit
574 vm_direct_exit(code);
575 }
576 ShouldNotReachHere();
577 }
578
579 void notify_vm_shutdown() {
580 // For now, just a dtrace probe.
581 HOTSPOT_VM_SHUTDOWN();
582 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
583 }
584
585 void vm_direct_exit(int code) {
586 notify_vm_shutdown();
587 os::wait_for_keypress_at_exit();
588 os::exit(code);
589 }
590
591 void vm_perform_shutdown_actions() {
592 if (is_init_completed()) {
593 Thread* thread = Thread::current_or_null();
594 if (thread != NULL && thread->is_Java_thread()) {
595 // We are leaving the VM, set state to native (in case any OS exit
596 // handlers call back to the VM)
597 JavaThread* jt = (JavaThread*)thread;
598 // Must always be walkable or have no last_Java_frame when in
599 // thread_in_native
600 jt->frame_anchor()->make_walkable(jt);
601 jt->set_thread_state(_thread_in_native);
602 }
603 }
604 notify_vm_shutdown();
605 }
606
607 void vm_shutdown()
608 {
609 vm_perform_shutdown_actions();
610 os::wait_for_keypress_at_exit();
611 os::shutdown();
612 }
613
614 void vm_abort(bool dump_core) {
615 vm_perform_shutdown_actions();
616 os::wait_for_keypress_at_exit();
617
618 // Flush stdout and stderr before abort.
619 fflush(stdout);
620 fflush(stderr);
621
622 os::abort(dump_core);
623 ShouldNotReachHere();
624 }
625
626 void vm_notify_during_shutdown(const char* error, const char* message) {
627 if (error != NULL) {
628 tty->print_cr("Error occurred during initialization of VM");
629 tty->print("%s", error);
630 if (message != NULL) {
631 tty->print_cr(": %s", message);
632 }
633 else {
634 tty->cr();
635 }
636 }
637 if (ShowMessageBoxOnError && WizardMode) {
638 fatal("Error occurred during initialization of VM");
639 }
640 }
641
642 void vm_exit_during_initialization() {
643 vm_notify_during_shutdown(NULL, NULL);
644
645 // Failure during initialization, we don't want to dump core
646 vm_abort(false);
647 }
648
649 void vm_exit_during_initialization(Handle exception) {
650 tty->print_cr("Error occurred during initialization of VM");
651 // If there are exceptions on this thread it must be cleared
652 // first and here. Any future calls to EXCEPTION_MARK requires
653 // that no pending exceptions exist.
654 Thread *THREAD = Thread::current(); // can't be NULL
655 if (HAS_PENDING_EXCEPTION) {
656 CLEAR_PENDING_EXCEPTION;
657 }
658 java_lang_Throwable::print_stack_trace(exception, tty);
659 tty->cr();
660 vm_notify_during_shutdown(NULL, NULL);
661
662 // Failure during initialization, we don't want to dump core
663 vm_abort(false);
664 }
665
666 void vm_exit_during_initialization(Symbol* ex, const char* message) {
667 ResourceMark rm;
668 vm_notify_during_shutdown(ex->as_C_string(), message);
669
670 // Failure during initialization, we don't want to dump core
671 vm_abort(false);
672 }
673
674 void vm_exit_during_initialization(const char* error, const char* message) {
675 vm_notify_during_shutdown(error, message);
676
677 // Failure during initialization, we don't want to dump core
678 vm_abort(false);
679 }
680
681 void vm_shutdown_during_initialization(const char* error, const char* message) {
682 vm_notify_during_shutdown(error, message);
683 vm_shutdown();
684 }
685
686 JDK_Version JDK_Version::_current;
687 const char* JDK_Version::_runtime_name;
688 const char* JDK_Version::_runtime_version;
689 const char* JDK_Version::_runtime_vendor_version;
690 const char* JDK_Version::_runtime_vendor_vm_bug_url;
691
692 void JDK_Version::initialize() {
693 jdk_version_info info;
694 assert(!_current.is_valid(), "Don't initialize twice");
695
696 void *lib_handle = os::native_java_library();
697 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
698 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
699
700 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223");
701
702 (*func)(&info, sizeof(info));
703
704 int major = JDK_VERSION_MAJOR(info.jdk_version);
705 int minor = JDK_VERSION_MINOR(info.jdk_version);
706 int security = JDK_VERSION_SECURITY(info.jdk_version);
707 int build = JDK_VERSION_BUILD(info.jdk_version);
708
709 // Incompatible with pre-4243978 JDK.
710 if (info.pending_list_uses_discovered_field == 0) {
711 vm_exit_during_initialization(
712 "Incompatible JDK is not using Reference.discovered field for pending list");
713 }
714 _current = JDK_Version(major, minor, security, info.patch_version, build,
715 info.thread_park_blocker == 1,
716 info.post_vm_init_hook_enabled == 1);
717 }
718
719 void JDK_Version_init() {
720 JDK_Version::initialize();
721 }
722
723 static int64_t encode_jdk_version(const JDK_Version& v) {
724 return
725 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
726 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
727 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
728 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
729 ((int64_t)v.build_number() << (BitsPerByte * 0));
730 }
731
732 int JDK_Version::compare(const JDK_Version& other) const {
733 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
734 uint64_t e = encode_jdk_version(*this);
735 uint64_t o = encode_jdk_version(other);
736 return (e > o) ? 1 : ((e == o) ? 0 : -1);
737 }
738
739 void JDK_Version::to_string(char* buffer, size_t buflen) const {
740 assert(buffer && buflen > 0, "call with useful buffer");
741 size_t index = 0;
742
743 if (!is_valid()) {
744 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
745 } else {
746 int rc = jio_snprintf(
747 &buffer[index], buflen - index, "%d.%d", _major, _minor);
748 if (rc == -1) return;
749 index += rc;
750 if (_security > 0) {
751 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
752 if (rc == -1) return;
753 index += rc;
754 }
755 if (_patch > 0) {
756 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch);
757 if (rc == -1) return;
758 index += rc;
759 }
760 if (_build > 0) {
761 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
762 if (rc == -1) return;
763 index += rc;
764 }
765 }
766 }