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/stringTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "code/codeCache.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compilerOracle.hpp"
32 #include "gc/shared/genCollectedHeap.hpp"
33 #include "interpreter/bytecodeHistogram.hpp"
34 #if INCLUDE_JVMCI
35 #include "jvmci/jvmciCompiler.hpp"
36 #include "jvmci/jvmciRuntime.hpp"
37 #endif
38 #include "logging/log.hpp"
39 #include "memory/oopFactory.hpp"
40 #include "memory/universe.hpp"
41 #include "oops/constantPool.hpp"
42 #include "oops/generateOopMap.hpp"
43 #include "oops/instanceKlass.hpp"
44 #include "oops/instanceOop.hpp"
45 #include "oops/method.hpp"
46 #include "oops/objArrayOop.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "prims/jvmtiExport.hpp"
50 #include "runtime/arguments.hpp"
51 #include "runtime/biasedLocking.hpp"
52 #include "runtime/compilationPolicy.hpp"
53 #include "runtime/deoptimization.hpp"
54 #include "runtime/fprofiler.hpp"
55 #include "runtime/init.hpp"
56 #include "runtime/interfaceSupport.hpp"
57 #include "runtime/java.hpp"
58 #include "runtime/memprofiler.hpp"
59 #include "runtime/sharedRuntime.hpp"
60 #include "runtime/statSampler.hpp"
61 #include "runtime/sweeper.hpp"
62 #include "runtime/task.hpp"
63 #include "runtime/thread.inline.hpp"
64 #include "runtime/timer.hpp"
65 #include "runtime/vm_operations.hpp"
66 #include "services/memTracker.hpp"
67 #include "trace/traceMacros.hpp"
68 #include "trace/tracing.hpp"
69 #include "utilities/dtrace.hpp"
70 #include "utilities/globalDefinitions.hpp"
71 #include "utilities/histogram.hpp"
72 #include "utilities/macros.hpp"
73 #include "utilities/vmError.hpp"
74 #if INCLUDE_ALL_GCS
75 #include "gc/cms/concurrentMarkSweepThread.hpp"
76 #include "gc/parallel/psScavenge.hpp"
77 #endif // INCLUDE_ALL_GCS
78 #ifdef COMPILER1
79 #include "c1/c1_Compiler.hpp"
80 #include "c1/c1_Runtime1.hpp"
81 #endif
82 #ifdef COMPILER2
83 #include "code/compiledIC.hpp"
84 #include "compiler/methodLiveness.hpp"
85 #include "opto/compile.hpp"
86 #include "opto/indexSet.hpp"
87 #include "opto/runtime.hpp"
88 #endif
89
90 GrowableArray<Method*>* collected_profiled_methods;
91
92 int compare_methods(Method** a, Method** b) {
93 // %%% there can be 32-bit overflow here
94 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
95 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
96 }
97
98 void collect_profiled_methods(Method* m) {
99 Thread* thread = Thread::current();
100 // This HandleMark prevents a huge amount of handles from being added
101 // to the metadata_handles() array on the thread.
102 HandleMark hm(thread);
103 methodHandle mh(thread, m);
104 if ((m->method_data() != NULL) &&
105 (PrintMethodData || CompilerOracle::should_print(mh))) {
106 collected_profiled_methods->push(m);
107 }
108 }
109
110 void print_method_profiling_data() {
111 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
112 (PrintMethodData || CompilerOracle::should_print_methods())) {
113 ResourceMark rm;
114 HandleMark hm;
115 collected_profiled_methods = new GrowableArray<Method*>(1024);
116 ClassLoaderDataGraph::methods_do(collect_profiled_methods);
117 collected_profiled_methods->sort(&compare_methods);
118
119 int count = collected_profiled_methods->length();
120 int total_size = 0;
121 if (count > 0) {
122 for (int index = 0; index < count; index++) {
123 Method* m = collected_profiled_methods->at(index);
124 ttyLocker ttyl;
125 tty->print_cr("------------------------------------------------------------------------");
126 m->print_invocation_count();
127 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
128 tty->cr();
129 // Dump data on parameters if any
130 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
131 tty->fill_to(2);
132 m->method_data()->parameters_type_data()->print_data_on(tty);
133 }
134 m->print_codes();
135 total_size += m->method_data()->size_in_bytes();
136 }
137 tty->print_cr("------------------------------------------------------------------------");
138 tty->print_cr("Total MDO size: %d bytes", total_size);
139 }
140 }
141 }
142
143
144 #ifndef PRODUCT
145
146 // Statistics printing (method invocation histogram)
147
148 GrowableArray<Method*>* collected_invoked_methods;
149
150 void collect_invoked_methods(Method* m) {
151 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
152 collected_invoked_methods->push(m);
153 }
154 }
155
156
157
158
159 void print_method_invocation_histogram() {
160 ResourceMark rm;
161 HandleMark hm;
162 collected_invoked_methods = new GrowableArray<Method*>(1024);
163 SystemDictionary::methods_do(collect_invoked_methods);
164 collected_invoked_methods->sort(&compare_methods);
165 //
166 tty->cr();
167 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
168 tty->cr();
169 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
170 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
171 synch_total = 0, nativ_total = 0, acces_total = 0;
172 for (int index = 0; index < collected_invoked_methods->length(); index++) {
173 Method* m = collected_invoked_methods->at(index);
174 int c = m->invocation_count() + m->compiled_invocation_count();
175 if (c >= MethodHistogramCutoff) m->print_invocation_count();
176 int_total += m->invocation_count();
177 comp_total += m->compiled_invocation_count();
178 if (m->is_final()) final_total += c;
179 if (m->is_static()) static_total += c;
180 if (m->is_synchronized()) synch_total += c;
181 if (m->is_native()) nativ_total += c;
182 if (m->is_accessor()) acces_total += c;
183 }
184 tty->cr();
185 total = int_total + comp_total;
186 tty->print_cr("Invocations summary:");
187 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
188 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
189 tty->print_cr("\t%9d (100%%) total", total);
190 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
191 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
192 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
193 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
194 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
195 tty->cr();
196 SharedRuntime::print_call_statistics(comp_total);
197 }
198
199 void print_bytecode_count() {
200 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
201 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
202 }
203 }
204
205 AllocStats alloc_stats;
206
207
208
209 // General statistics printing (profiling ...)
210 void print_statistics() {
211 #ifdef ASSERT
212
213 if (CountRuntimeCalls) {
214 extern Histogram *RuntimeHistogram;
215 RuntimeHistogram->print();
216 }
217
218 if (CountJNICalls) {
219 extern Histogram *JNIHistogram;
220 JNIHistogram->print();
221 }
222
223 if (CountJVMCalls) {
224 extern Histogram *JVMHistogram;
225 JVMHistogram->print();
226 }
227
228 #endif
229
230 if (MemProfiling) {
231 MemProfiler::disengage();
232 }
233
234 if (CITime) {
235 CompileBroker::print_times();
236 }
237
238 #ifdef COMPILER1
239 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
240 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
241 Runtime1::print_statistics();
242 Deoptimization::print_statistics();
243 SharedRuntime::print_statistics();
244 }
245 #endif /* COMPILER1 */
246
247 #ifdef COMPILER2
248 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
249 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
250 Compile::print_statistics();
251 #ifndef COMPILER1
252 Deoptimization::print_statistics();
253 SharedRuntime::print_statistics();
254 #endif //COMPILER1
255 os::print_statistics();
256 }
257
258 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
259 OptoRuntime::print_named_counters();
260 }
261
262 if (TimeLivenessAnalysis) {
263 MethodLiveness::print_times();
264 }
265 #ifdef ASSERT
266 if (CollectIndexSetStatistics) {
267 IndexSet::print_statistics();
268 }
269 #endif // ASSERT
270 #else
271 #ifdef INCLUDE_JVMCI
272 #ifndef COMPILER1
273 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
274 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
275 Deoptimization::print_statistics();
276 SharedRuntime::print_statistics();
277 }
278 #endif
279 #endif
280 #endif
281
282 if (PrintNMethodStatistics) {
283 nmethod::print_statistics();
284 }
285 if (CountCompiledCalls) {
286 print_method_invocation_histogram();
287 }
288
289 print_method_profiling_data();
290
291 if (TimeCompilationPolicy) {
292 CompilationPolicy::policy()->print_time();
293 }
294 if (TimeOopMap) {
295 GenerateOopMap::print_time();
296 }
297 if (ProfilerCheckIntervals) {
298 PeriodicTask::print_intervals();
299 }
300 if (PrintSymbolTableSizeHistogram) {
301 SymbolTable::print_histogram();
302 }
303 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
304 BytecodeCounter::print();
305 }
306 if (PrintBytecodePairHistogram) {
307 BytecodePairHistogram::print();
308 }
309
310 if (PrintCodeCache) {
311 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
312 CodeCache::print();
313 }
314
315 if (PrintMethodFlushingStatistics) {
316 NMethodSweeper::print();
317 }
318
319 if (PrintCodeCache2) {
320 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
321 CodeCache::print_internals();
322 }
323
324 if (PrintVtableStats) {
325 klassVtable::print_statistics();
326 klassItable::print_statistics();
327 }
328 if (VerifyOops) {
329 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
330 }
331
332 print_bytecode_count();
333 if (PrintMallocStatistics) {
334 tty->print("allocation stats: ");
335 alloc_stats.print();
336 tty->cr();
337 }
338
339 if (PrintSystemDictionaryAtExit) {
340 SystemDictionary::print();
341 }
342
343 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
344 Method::print_touched_methods(tty);
345 }
346
347 if (PrintBiasedLockingStatistics) {
348 BiasedLocking::print_counters();
349 }
350
351 // Native memory tracking data
352 if (PrintNMTStatistics) {
353 MemTracker::final_report(tty);
354 }
355 }
356
357 #else // PRODUCT MODE STATISTICS
358
359 void print_statistics() {
360
361 if (PrintMethodData) {
362 print_method_profiling_data();
363 }
364
365 if (CITime) {
366 CompileBroker::print_times();
367 }
368
369 if (PrintCodeCache) {
370 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
371 CodeCache::print();
372 }
373
374 if (PrintMethodFlushingStatistics) {
375 NMethodSweeper::print();
376 }
377
378 #ifdef COMPILER2
379 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
380 OptoRuntime::print_named_counters();
381 }
382 #endif
383 if (PrintBiasedLockingStatistics) {
384 BiasedLocking::print_counters();
385 }
386
387 // Native memory tracking data
388 if (PrintNMTStatistics) {
389 MemTracker::final_report(tty);
390 }
391
392 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
393 Method::print_touched_methods(tty);
394 }
395 }
396
397 #endif
398
399 // Note: before_exit() can be executed only once, if more than one threads
400 // are trying to shutdown the VM at the same time, only one thread
401 // can run before_exit() and all other threads must wait.
402 void before_exit(JavaThread* thread) {
403 #define BEFORE_EXIT_NOT_RUN 0
404 #define BEFORE_EXIT_RUNNING 1
405 #define BEFORE_EXIT_DONE 2
406 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
407
408 // Note: don't use a Mutex to guard the entire before_exit(), as
409 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
410 // A CAS or OSMutex would work just fine but then we need to manipulate
411 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
412 // for synchronization.
413 { MutexLocker ml(BeforeExit_lock);
414 switch (_before_exit_status) {
415 case BEFORE_EXIT_NOT_RUN:
416 _before_exit_status = BEFORE_EXIT_RUNNING;
417 break;
418 case BEFORE_EXIT_RUNNING:
419 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
420 BeforeExit_lock->wait();
421 }
422 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
423 return;
424 case BEFORE_EXIT_DONE:
425 // need block to avoid SS compiler bug
426 {
427 return;
428 }
429 }
430 }
431
432 #if INCLUDE_JVMCI
433 // We are not using CATCH here because we want the exit to continue normally.
434 Thread* THREAD = thread;
435 JVMCIRuntime::shutdown(THREAD);
436 if (HAS_PENDING_EXCEPTION) {
437 Handle exception(THREAD, PENDING_EXCEPTION);
438 CLEAR_PENDING_EXCEPTION;
439 java_lang_Throwable::java_printStackTrace(exception, THREAD);
440 }
441 #endif
442
443 // Hang forever on exit if we're reporting an error.
444 if (ShowMessageBoxOnError && is_error_reported()) {
445 os::infinite_sleep();
446 }
447
448 // Stop the WatcherThread. We do this before disenrolling various
449 // PeriodicTasks to reduce the likelihood of races.
450 if (PeriodicTask::num_tasks() > 0) {
451 WatcherThread::stop();
452 }
453
454 // Print statistics gathered (profiling ...)
455 if (Arguments::has_profile()) {
456 FlatProfiler::disengage();
457 FlatProfiler::print(10);
458 }
459
460 // shut down the StatSampler task
461 StatSampler::disengage();
462 StatSampler::destroy();
463
464 // Stop concurrent GC threads
465 Universe::heap()->stop();
466
467 // Print GC/heap related information.
468 LogHandle(gc, heap, exit) log;
469 if (log.is_info()) {
470 ResourceMark rm;
471 Universe::print_on(log.info_stream());
472 if (log.is_trace()) {
473 ClassLoaderDataGraph::dump_on(log.trace_stream());
474 }
475 }
476 AdaptiveSizePolicyOutput::print();
477
478 if (PrintBytecodeHistogram) {
479 BytecodeHistogram::print();
480 }
481
482 if (JvmtiExport::should_post_thread_life()) {
483 JvmtiExport::post_thread_end(thread);
484 }
485
486
487 EventThreadEnd event;
488 if (event.should_commit()) {
489 event.set_thread(THREAD_TRACE_ID(thread));
490 event.commit();
491 }
492
493 // Always call even when there are not JVMTI environments yet, since environments
494 // may be attached late and JVMTI must track phases of VM execution
495 JvmtiExport::post_vm_death();
496 Threads::shutdown_vm_agents();
497
498 // Terminate the signal thread
499 // Note: we don't wait until it actually dies.
500 os::terminate_signal_thread();
501
502 print_statistics();
503 Universe::heap()->print_tracing_info();
504
505 { MutexLocker ml(BeforeExit_lock);
506 _before_exit_status = BEFORE_EXIT_DONE;
507 BeforeExit_lock->notify_all();
508 }
509
510 if (VerifyStringTableAtExit) {
511 int fail_cnt = 0;
512 {
513 MutexLocker ml(StringTable_lock);
514 fail_cnt = StringTable::verify_and_compare_entries();
515 }
516
517 if (fail_cnt != 0) {
518 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
519 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
520 }
521 }
522
523 #undef BEFORE_EXIT_NOT_RUN
524 #undef BEFORE_EXIT_RUNNING
525 #undef BEFORE_EXIT_DONE
526 }
527
528 void vm_exit(int code) {
529 Thread* thread =
530 ThreadLocalStorage::is_initialized() ? Thread::current_or_null() : NULL;
531 if (thread == NULL) {
532 // very early initialization failure -- just exit
533 vm_direct_exit(code);
534 }
535
536 if (VMThread::vm_thread() != NULL) {
537 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
538 VM_Exit op(code);
539 if (thread->is_Java_thread())
540 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
541 VMThread::execute(&op);
542 // should never reach here; but in case something wrong with VM Thread.
543 vm_direct_exit(code);
544 } else {
545 // VM thread is gone, just exit
546 vm_direct_exit(code);
547 }
548 ShouldNotReachHere();
549 }
550
551 void notify_vm_shutdown() {
552 // For now, just a dtrace probe.
553 HOTSPOT_VM_SHUTDOWN();
554 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
555 }
556
557 void vm_direct_exit(int code) {
558 notify_vm_shutdown();
559 os::wait_for_keypress_at_exit();
560 os::exit(code);
561 }
562
563 void vm_perform_shutdown_actions() {
564 // Warning: do not call 'exit_globals()' here. All threads are still running.
565 // Calling 'exit_globals()' will disable thread-local-storage and cause all
566 // kinds of assertions to trigger in debug mode.
567 if (is_init_completed()) {
568 Thread* thread = Thread::current_or_null();
569 if (thread != NULL && thread->is_Java_thread()) {
570 // We are leaving the VM, set state to native (in case any OS exit
571 // handlers call back to the VM)
572 JavaThread* jt = (JavaThread*)thread;
573 // Must always be walkable or have no last_Java_frame when in
574 // thread_in_native
575 jt->frame_anchor()->make_walkable(jt);
576 jt->set_thread_state(_thread_in_native);
577 }
578 }
579 notify_vm_shutdown();
580 }
581
582 void vm_shutdown()
583 {
584 vm_perform_shutdown_actions();
585 os::wait_for_keypress_at_exit();
586 os::shutdown();
587 }
588
589 void vm_abort(bool dump_core) {
590 vm_perform_shutdown_actions();
591 os::wait_for_keypress_at_exit();
592
593 // Flush stdout and stderr before abort.
594 fflush(stdout);
595 fflush(stderr);
596
597 os::abort(dump_core);
598 ShouldNotReachHere();
599 }
600
601 void vm_notify_during_shutdown(const char* error, const char* message) {
602 if (error != NULL) {
603 tty->print_cr("Error occurred during initialization of VM");
604 tty->print("%s", error);
605 if (message != NULL) {
606 tty->print_cr(": %s", message);
607 }
608 else {
609 tty->cr();
610 }
611 }
612 if (ShowMessageBoxOnError && WizardMode) {
613 fatal("Error occurred during initialization of VM");
614 }
615 }
616
617 void vm_exit_during_initialization(Handle exception) {
618 tty->print_cr("Error occurred during initialization of VM");
619 // If there are exceptions on this thread it must be cleared
620 // first and here. Any future calls to EXCEPTION_MARK requires
621 // that no pending exceptions exist.
622 Thread *THREAD = Thread::current(); // can't be NULL
623 if (HAS_PENDING_EXCEPTION) {
624 CLEAR_PENDING_EXCEPTION;
625 }
626 java_lang_Throwable::print_stack_trace(exception, tty);
627 tty->cr();
628 vm_notify_during_shutdown(NULL, NULL);
629
630 // Failure during initialization, we don't want to dump core
631 vm_abort(false);
632 }
633
634 void vm_exit_during_initialization(Symbol* ex, const char* message) {
635 ResourceMark rm;
636 vm_notify_during_shutdown(ex->as_C_string(), message);
637
638 // Failure during initialization, we don't want to dump core
639 vm_abort(false);
640 }
641
642 void vm_exit_during_initialization(const char* error, const char* message) {
643 vm_notify_during_shutdown(error, message);
644
645 // Failure during initialization, we don't want to dump core
646 vm_abort(false);
647 }
648
649 void vm_shutdown_during_initialization(const char* error, const char* message) {
650 vm_notify_during_shutdown(error, message);
651 vm_shutdown();
652 }
653
654 JDK_Version JDK_Version::_current;
655 const char* JDK_Version::_runtime_name;
656 const char* JDK_Version::_runtime_version;
657
658 void JDK_Version::initialize() {
659 jdk_version_info info;
660 assert(!_current.is_valid(), "Don't initialize twice");
661
662 void *lib_handle = os::native_java_library();
663 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
664 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
665
666 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223");
667
668 (*func)(&info, sizeof(info));
669
670 int major = JDK_VERSION_MAJOR(info.jdk_version);
671 int minor = JDK_VERSION_MINOR(info.jdk_version);
672 int security = JDK_VERSION_SECURITY(info.jdk_version);
673 int build = JDK_VERSION_BUILD(info.jdk_version);
674
675 // Incompatible with pre-4243978 JDK.
676 if (info.pending_list_uses_discovered_field == 0) {
677 vm_exit_during_initialization(
678 "Incompatible JDK is not using Reference.discovered field for pending list");
679 }
680 _current = JDK_Version(major, minor, security, info.patch_version, build,
681 info.thread_park_blocker == 1,
682 info.post_vm_init_hook_enabled == 1);
683 }
684
685 void JDK_Version_init() {
686 JDK_Version::initialize();
687 }
688
689 static int64_t encode_jdk_version(const JDK_Version& v) {
690 return
691 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
692 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
693 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
694 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
695 ((int64_t)v.build_number() << (BitsPerByte * 0));
696 }
697
698 int JDK_Version::compare(const JDK_Version& other) const {
699 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
700 uint64_t e = encode_jdk_version(*this);
701 uint64_t o = encode_jdk_version(other);
702 return (e > o) ? 1 : ((e == o) ? 0 : -1);
703 }
704
705 void JDK_Version::to_string(char* buffer, size_t buflen) const {
706 assert(buffer && buflen > 0, "call with useful buffer");
707 size_t index = 0;
708
709 if (!is_valid()) {
710 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
711 } else {
712 int rc = jio_snprintf(
713 &buffer[index], buflen - index, "%d.%d", _major, _minor);
714 if (rc == -1) return;
715 index += rc;
716 if (_security > 0) {
717 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
718 }
719 if (_patch > 0) {
720 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch);
721 if (rc == -1) return;
722 index += rc;
723 }
724 if (_build > 0) {
725 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
726 if (rc == -1) return;
727 index += rc;
728 }
729 }
730 }