1 /*
2 * Copyright (c) 1997, 2015, 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 "memory/oopFactory.hpp"
39 #include "memory/universe.hpp"
40 #include "oops/constantPool.hpp"
41 #include "oops/generateOopMap.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/instanceOop.hpp"
44 #include "oops/method.hpp"
45 #include "oops/objArrayOop.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "prims/jvmtiExport.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/biasedLocking.hpp"
51 #include "runtime/compilationPolicy.hpp"
52 #include "runtime/deoptimization.hpp"
53 #include "runtime/fprofiler.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/interfaceSupport.hpp"
56 #include "runtime/java.hpp"
57 #include "runtime/memprofiler.hpp"
58 #include "runtime/sharedRuntime.hpp"
59 #include "runtime/statSampler.hpp"
60 #include "runtime/sweeper.hpp"
61 #include "runtime/task.hpp"
62 #include "runtime/thread.inline.hpp"
63 #include "runtime/timer.hpp"
64 #include "runtime/vm_operations.hpp"
65 #include "services/memTracker.hpp"
66 #include "trace/tracing.hpp"
67 #include "utilities/dtrace.hpp"
68 #include "utilities/globalDefinitions.hpp"
69 #include "utilities/histogram.hpp"
70 #include "utilities/macros.hpp"
71 #include "utilities/vmError.hpp"
72 #if INCLUDE_ALL_GCS
73 #include "gc/cms/concurrentMarkSweepThread.hpp"
74 #include "gc/parallel/psScavenge.hpp"
75 #endif // INCLUDE_ALL_GCS
76 #ifdef COMPILER1
77 #include "c1/c1_Compiler.hpp"
78 #include "c1/c1_Runtime1.hpp"
79 #endif
80 #ifdef COMPILER2
81 #include "code/compiledIC.hpp"
82 #include "compiler/methodLiveness.hpp"
83 #include "opto/compile.hpp"
84 #include "opto/indexSet.hpp"
85 #include "opto/runtime.hpp"
86 #endif
87
88 GrowableArray<Method*>* collected_profiled_methods;
89
90 int compare_methods(Method** a, Method** b) {
91 // %%% there can be 32-bit overflow here
92 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
93 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
94 }
95
96 void collect_profiled_methods(Method* m) {
97 Thread* thread = Thread::current();
98 // This HandleMark prevents a huge amount of handles from being added
99 // to the metadata_handles() array on the thread.
100 HandleMark hm(thread);
101 methodHandle mh(thread, m);
102 if ((m->method_data() != NULL) &&
103 (PrintMethodData || CompilerOracle::should_print(mh))) {
104 collected_profiled_methods->push(m);
105 }
106 }
107
108 void print_method_profiling_data() {
109 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
110 (PrintMethodData || CompilerOracle::should_print_methods())) {
111 ResourceMark rm;
112 HandleMark hm;
113 collected_profiled_methods = new GrowableArray<Method*>(1024);
114 ClassLoaderDataGraph::methods_do(collect_profiled_methods);
115 collected_profiled_methods->sort(&compare_methods);
116
117 int count = collected_profiled_methods->length();
118 int total_size = 0;
119 if (count > 0) {
120 for (int index = 0; index < count; index++) {
121 Method* m = collected_profiled_methods->at(index);
122 ttyLocker ttyl;
123 tty->print_cr("------------------------------------------------------------------------");
124 m->print_invocation_count();
125 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
126 tty->cr();
127 // Dump data on parameters if any
128 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
129 tty->fill_to(2);
130 m->method_data()->parameters_type_data()->print_data_on(tty);
131 }
132 m->print_codes();
133 total_size += m->method_data()->size_in_bytes();
134 }
135 tty->print_cr("------------------------------------------------------------------------");
136 tty->print_cr("Total MDO size: %d bytes", total_size);
137 }
138 }
139 }
140
141
142 #ifndef PRODUCT
143
144 // Statistics printing (method invocation histogram)
145
146 GrowableArray<Method*>* collected_invoked_methods;
147
148 void collect_invoked_methods(Method* m) {
149 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
150 collected_invoked_methods->push(m);
151 }
152 }
153
154
155
156
157 void print_method_invocation_histogram() {
158 ResourceMark rm;
159 HandleMark hm;
160 collected_invoked_methods = new GrowableArray<Method*>(1024);
161 SystemDictionary::methods_do(collect_invoked_methods);
162 collected_invoked_methods->sort(&compare_methods);
163 //
164 tty->cr();
165 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = " INTX_FORMAT "):", MethodHistogramCutoff);
166 tty->cr();
167 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
168 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
169 synch_total = 0, nativ_total = 0, acces_total = 0;
170 for (int index = 0; index < collected_invoked_methods->length(); index++) {
171 Method* m = collected_invoked_methods->at(index);
172 int c = m->invocation_count() + m->compiled_invocation_count();
173 if (c >= MethodHistogramCutoff) m->print_invocation_count();
174 int_total += m->invocation_count();
175 comp_total += m->compiled_invocation_count();
176 if (m->is_final()) final_total += c;
177 if (m->is_static()) static_total += c;
178 if (m->is_synchronized()) synch_total += c;
179 if (m->is_native()) nativ_total += c;
180 if (m->is_accessor()) acces_total += c;
181 }
182 tty->cr();
183 total = int_total + comp_total;
184 tty->print_cr("Invocations summary:");
185 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
186 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
187 tty->print_cr("\t%9d (100%%) total", total);
188 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
189 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
190 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
191 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
192 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
193 tty->cr();
194 SharedRuntime::print_call_statistics(comp_total);
195 }
196
197 void print_bytecode_count() {
198 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
199 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
200 }
201 }
202
203 AllocStats alloc_stats;
204
205
206
207 // General statistics printing (profiling ...)
208 void print_statistics() {
209 #ifdef ASSERT
210
211 if (CountRuntimeCalls) {
212 extern Histogram *RuntimeHistogram;
213 RuntimeHistogram->print();
214 }
215
216 if (CountJNICalls) {
217 extern Histogram *JNIHistogram;
218 JNIHistogram->print();
219 }
220
221 if (CountJVMCalls) {
222 extern Histogram *JVMHistogram;
223 JVMHistogram->print();
224 }
225
226 #endif
227
228 if (MemProfiling) {
229 MemProfiler::disengage();
230 }
231
232 if (CITime) {
233 CompileBroker::print_times();
234 }
235
236 #ifdef COMPILER1
237 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
238 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
239 Runtime1::print_statistics();
240 Deoptimization::print_statistics();
241 SharedRuntime::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 SharedRuntime::print_statistics();
252 #endif //COMPILER1
253 os::print_statistics();
254 }
255
256 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
257 OptoRuntime::print_named_counters();
258 }
259
260 if (TimeLivenessAnalysis) {
261 MethodLiveness::print_times();
262 }
263 #ifdef ASSERT
264 if (CollectIndexSetStatistics) {
265 IndexSet::print_statistics();
266 }
267 #endif // ASSERT
268 #else
269 #ifdef INCLUDE_JVMCI
270 #ifndef COMPILER1
271 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
272 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
273 Deoptimization::print_statistics();
274 SharedRuntime::print_statistics();
275 }
276 #endif
277 #endif
278 #endif
279
280 if (PrintNMethodStatistics) {
281 nmethod::print_statistics();
282 }
283 if (CountCompiledCalls) {
284 print_method_invocation_histogram();
285 }
286
287 print_method_profiling_data();
288
289 if (TimeCompilationPolicy) {
290 CompilationPolicy::policy()->print_time();
291 }
292 if (TimeOopMap) {
293 GenerateOopMap::print_time();
294 }
295 if (ProfilerCheckIntervals) {
296 PeriodicTask::print_intervals();
297 }
298 if (PrintSymbolTableSizeHistogram) {
299 SymbolTable::print_histogram();
300 }
301 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
302 BytecodeCounter::print();
303 }
304 if (PrintBytecodePairHistogram) {
305 BytecodePairHistogram::print();
306 }
307
308 if (PrintCodeCache) {
309 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
310 CodeCache::print();
311 }
312
313 if (PrintMethodFlushingStatistics) {
314 NMethodSweeper::print();
315 }
316
317 if (PrintCodeCache2) {
318 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
319 CodeCache::print_internals();
320 }
321
322 if (PrintVtableStats) {
323 klassVtable::print_statistics();
324 klassItable::print_statistics();
325 }
326 if (VerifyOops) {
327 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
328 }
329
330 print_bytecode_count();
331 if (PrintMallocStatistics) {
332 tty->print("allocation stats: ");
333 alloc_stats.print();
334 tty->cr();
335 }
336
337 if (PrintSystemDictionaryAtExit) {
338 SystemDictionary::print();
339 }
340
341 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
342 Method::print_touched_methods(tty);
343 }
344
345 if (PrintBiasedLockingStatistics) {
346 BiasedLocking::print_counters();
347 }
348
349 // Native memory tracking data
350 if (PrintNMTStatistics) {
351 MemTracker::final_report(tty);
352 }
353 }
354
355 #else // PRODUCT MODE STATISTICS
356
357 void print_statistics() {
358
359 if (PrintMethodData) {
360 print_method_profiling_data();
361 }
362
363 if (CITime) {
364 CompileBroker::print_times();
365 }
366
367 if (PrintCodeCache) {
368 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
369 CodeCache::print();
370 }
371
372 if (PrintMethodFlushingStatistics) {
373 NMethodSweeper::print();
374 }
375
376 #ifdef COMPILER2
377 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
378 OptoRuntime::print_named_counters();
379 }
380 #endif
381 if (PrintBiasedLockingStatistics) {
382 BiasedLocking::print_counters();
383 }
384
385 // Native memory tracking data
386 if (PrintNMTStatistics) {
387 MemTracker::final_report(tty);
388 }
389
390 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
391 Method::print_touched_methods(tty);
392 }
393 }
394
395 #endif
396
397 // Note: before_exit() can be executed only once, if more than one threads
398 // are trying to shutdown the VM at the same time, only one thread
399 // can run before_exit() and all other threads must wait.
400 void before_exit(JavaThread * thread) {
401 #define BEFORE_EXIT_NOT_RUN 0
402 #define BEFORE_EXIT_RUNNING 1
403 #define BEFORE_EXIT_DONE 2
404 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
405
406 // Note: don't use a Mutex to guard the entire before_exit(), as
407 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
408 // A CAS or OSMutex would work just fine but then we need to manipulate
409 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
410 // for synchronization.
411 { MutexLocker ml(BeforeExit_lock);
412 switch (_before_exit_status) {
413 case BEFORE_EXIT_NOT_RUN:
414 _before_exit_status = BEFORE_EXIT_RUNNING;
415 break;
416 case BEFORE_EXIT_RUNNING:
417 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
418 BeforeExit_lock->wait();
419 }
420 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
421 return;
422 case BEFORE_EXIT_DONE:
423 return;
424 }
425 }
426
427 #if INCLUDE_JVMCI
428 JVMCIRuntime::shutdown();
429 #endif
430
431 // Hang forever on exit if we're reporting an error.
432 if (ShowMessageBoxOnError && is_error_reported()) {
433 os::infinite_sleep();
434 }
435
436 // Stop the WatcherThread. We do this before disenrolling various
437 // PeriodicTasks to reduce the likelihood of races.
438 if (PeriodicTask::num_tasks() > 0) {
439 WatcherThread::stop();
440 }
441
442 // Print statistics gathered (profiling ...)
443 if (Arguments::has_profile()) {
444 FlatProfiler::disengage();
445 FlatProfiler::print(10);
446 }
447
448 // shut down the StatSampler task
449 StatSampler::disengage();
450 StatSampler::destroy();
451
452 // Stop concurrent GC threads
453 Universe::heap()->stop();
454
455 // Print GC/heap related information.
456 if (PrintGCDetails) {
457 Universe::print();
458 AdaptiveSizePolicyOutput(0);
459 if (Verbose) {
460 ClassLoaderDataGraph::dump_on(gclog_or_tty);
461 }
462 }
463
464 if (PrintBytecodeHistogram) {
465 BytecodeHistogram::print();
466 }
467
468 if (JvmtiExport::should_post_thread_life()) {
469 JvmtiExport::post_thread_end(thread);
470 }
471
472
473 EventThreadEnd event;
474 if (event.should_commit()) {
475 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
476 event.commit();
477 }
478
479 // Always call even when there are not JVMTI environments yet, since environments
480 // may be attached late and JVMTI must track phases of VM execution
481 JvmtiExport::post_vm_death();
482 Threads::shutdown_vm_agents();
483
484 // Terminate the signal thread
485 // Note: we don't wait until it actually dies.
486 os::terminate_signal_thread();
487
488 print_statistics();
489 Universe::heap()->print_tracing_info();
490
491 { MutexLocker ml(BeforeExit_lock);
492 _before_exit_status = BEFORE_EXIT_DONE;
493 BeforeExit_lock->notify_all();
494 }
495
496 if (VerifyStringTableAtExit) {
497 int fail_cnt = 0;
498 {
499 MutexLocker ml(StringTable_lock);
500 fail_cnt = StringTable::verify_and_compare_entries();
501 }
502
503 if (fail_cnt != 0) {
504 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
505 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
506 }
507 }
508
509 #undef BEFORE_EXIT_NOT_RUN
510 #undef BEFORE_EXIT_RUNNING
511 #undef BEFORE_EXIT_DONE
512 }
513
514 void vm_exit(int code) {
515 Thread* thread = ThreadLocalStorage::is_initialized() ?
516 ThreadLocalStorage::get_thread_slow() : NULL;
517 if (thread == NULL) {
518 // we have serious problems -- just exit
519 vm_direct_exit(code);
520 }
521
522 if (VMThread::vm_thread() != NULL) {
523 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
524 VM_Exit op(code);
525 if (thread->is_Java_thread())
526 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
527 VMThread::execute(&op);
528 // should never reach here; but in case something wrong with VM Thread.
529 vm_direct_exit(code);
530 } else {
531 // VM thread is gone, just exit
532 vm_direct_exit(code);
533 }
534 ShouldNotReachHere();
535 }
536
537 void notify_vm_shutdown() {
538 // For now, just a dtrace probe.
539 HOTSPOT_VM_SHUTDOWN();
540 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
541 }
542
543 void vm_direct_exit(int code) {
544 notify_vm_shutdown();
545 os::wait_for_keypress_at_exit();
546 os::exit(code);
547 }
548
549 void vm_perform_shutdown_actions() {
550 // Warning: do not call 'exit_globals()' here. All threads are still running.
551 // Calling 'exit_globals()' will disable thread-local-storage and cause all
552 // kinds of assertions to trigger in debug mode.
553 if (is_init_completed()) {
554 Thread* thread = ThreadLocalStorage::is_initialized() ?
555 ThreadLocalStorage::get_thread_slow() : NULL;
556 if (thread != NULL && thread->is_Java_thread()) {
557 // We are leaving the VM, set state to native (in case any OS exit
558 // handlers call back to the VM)
559 JavaThread* jt = (JavaThread*)thread;
560 // Must always be walkable or have no last_Java_frame when in
561 // thread_in_native
562 jt->frame_anchor()->make_walkable(jt);
563 jt->set_thread_state(_thread_in_native);
564 }
565 }
566 notify_vm_shutdown();
567 }
568
569 void vm_shutdown()
570 {
571 vm_perform_shutdown_actions();
572 os::wait_for_keypress_at_exit();
573 os::shutdown();
574 }
575
576 void vm_abort(bool dump_core) {
577 vm_perform_shutdown_actions();
578 os::wait_for_keypress_at_exit();
579
580 // Flush stdout and stderr before abort.
581 fflush(stdout);
582 fflush(stderr);
583
584 os::abort(dump_core);
585 ShouldNotReachHere();
586 }
587
588 void vm_notify_during_shutdown(const char* error, const char* message) {
589 if (error != NULL) {
590 tty->print_cr("Error occurred during initialization of VM");
591 tty->print("%s", error);
592 if (message != NULL) {
593 tty->print_cr(": %s", message);
594 }
595 else {
596 tty->cr();
597 }
598 }
599 if (ShowMessageBoxOnError && WizardMode) {
600 fatal("Error occurred during initialization of VM");
601 }
602 }
603
604 void vm_exit_during_initialization(Handle exception) {
605 tty->print_cr("Error occurred during initialization of VM");
606 // If there are exceptions on this thread it must be cleared
607 // first and here. Any future calls to EXCEPTION_MARK requires
608 // that no pending exceptions exist.
609 Thread *THREAD = Thread::current();
610 if (HAS_PENDING_EXCEPTION) {
611 CLEAR_PENDING_EXCEPTION;
612 }
613 java_lang_Throwable::print(exception, tty);
614 tty->cr();
615 java_lang_Throwable::print_stack_trace(exception(), tty);
616 tty->cr();
617 vm_notify_during_shutdown(NULL, NULL);
618
619 // Failure during initialization, we don't want to dump core
620 vm_abort(false);
621 }
622
623 void vm_exit_during_initialization(Symbol* ex, const char* message) {
624 ResourceMark rm;
625 vm_notify_during_shutdown(ex->as_C_string(), message);
626
627 // Failure during initialization, we don't want to dump core
628 vm_abort(false);
629 }
630
631 void vm_exit_during_initialization(const char* error, const char* message) {
632 vm_notify_during_shutdown(error, message);
633
634 // Failure during initialization, we don't want to dump core
635 vm_abort(false);
636 }
637
638 void vm_shutdown_during_initialization(const char* error, const char* message) {
639 vm_notify_during_shutdown(error, message);
640 vm_shutdown();
641 }
642
643 JDK_Version JDK_Version::_current;
644 const char* JDK_Version::_runtime_name;
645 const char* JDK_Version::_runtime_version;
646
647 void JDK_Version::initialize() {
648 jdk_version_info info;
649 assert(!_current.is_valid(), "Don't initialize twice");
650
651 void *lib_handle = os::native_java_library();
652 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
653 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
654
655 assert(func != NULL, "Support for JDK 1.5 or older has been removed after JEP-223");
656
657 (*func)(&info, sizeof(info));
658
659 int major = JDK_VERSION_MAJOR(info.jdk_version);
660 int minor = JDK_VERSION_MINOR(info.jdk_version);
661 int security = JDK_VERSION_SECURITY(info.jdk_version);
662 int build = JDK_VERSION_BUILD(info.jdk_version);
663
664 // Incompatible with pre-4243978 JDK.
665 if (info.pending_list_uses_discovered_field == 0) {
666 vm_exit_during_initialization(
667 "Incompatible JDK is not using Reference.discovered field for pending list");
668 }
669 _current = JDK_Version(major, minor, security, info.patch_version, build,
670 info.thread_park_blocker == 1,
671 info.post_vm_init_hook_enabled == 1);
672 }
673
674 void JDK_Version_init() {
675 JDK_Version::initialize();
676 }
677
678 static int64_t encode_jdk_version(const JDK_Version& v) {
679 return
680 ((int64_t)v.major_version() << (BitsPerByte * 4)) |
681 ((int64_t)v.minor_version() << (BitsPerByte * 3)) |
682 ((int64_t)v.security_version() << (BitsPerByte * 2)) |
683 ((int64_t)v.patch_version() << (BitsPerByte * 1)) |
684 ((int64_t)v.build_number() << (BitsPerByte * 0));
685 }
686
687 int JDK_Version::compare(const JDK_Version& other) const {
688 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
689 uint64_t e = encode_jdk_version(*this);
690 uint64_t o = encode_jdk_version(other);
691 return (e > o) ? 1 : ((e == o) ? 0 : -1);
692 }
693
694 void JDK_Version::to_string(char* buffer, size_t buflen) const {
695 assert(buffer && buflen > 0, "call with useful buffer");
696 size_t index = 0;
697
698 if (!is_valid()) {
699 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
700 } else {
701 int rc = jio_snprintf(
702 &buffer[index], buflen - index, "%d.%d", _major, _minor);
703 if (rc == -1) return;
704 index += rc;
705 if (_security > 0) {
706 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _security);
707 }
708 if (_patch > 0) {
709 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _patch);
710 if (rc == -1) return;
711 index += rc;
712 }
713 if (_build > 0) {
714 rc = jio_snprintf(&buffer[index], buflen - index, "+%d", _build);
715 if (rc == -1) return;
716 index += rc;
717 }
718 }
719 }