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 "interpreter/bytecodeHistogram.hpp"
33 #include "memory/genCollectedHeap.hpp"
34 #include "memory/oopFactory.hpp"
35 #include "memory/universe.hpp"
36 #include "oops/constantPool.hpp"
37 #include "oops/generateOopMap.hpp"
38 #include "oops/instanceKlass.hpp"
39 #include "oops/instanceOop.hpp"
40 #include "oops/method.hpp"
41 #include "oops/objArrayOop.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "oops/symbol.hpp"
44 #include "prims/jvmtiExport.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/biasedLocking.hpp"
47 #include "runtime/compilationPolicy.hpp"
48 #include "runtime/fprofiler.hpp"
49 #include "runtime/init.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/java.hpp"
52 #include "runtime/memprofiler.hpp"
53 #include "runtime/sharedRuntime.hpp"
54 #include "runtime/statSampler.hpp"
55 #include "runtime/sweeper.hpp"
56 #include "runtime/task.hpp"
57 #include "runtime/thread.inline.hpp"
58 #include "runtime/timer.hpp"
59 #include "runtime/vm_operations.hpp"
60 #include "services/memTracker.hpp"
61 #include "trace/tracing.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/globalDefinitions.hpp"
64 #include "utilities/histogram.hpp"
65 #include "utilities/macros.hpp"
66 #include "utilities/vmError.hpp"
67 #if INCLUDE_ALL_GCS
68 #include "gc_implementation/concurrentMarkSweep/concurrentMarkSweepThread.hpp"
69 #include "gc_implementation/parallelScavenge/psScavenge.hpp"
70 #endif // INCLUDE_ALL_GCS
71 #ifdef COMPILER1
72 #include "c1/c1_Compiler.hpp"
73 #include "c1/c1_Runtime1.hpp"
74 #endif
75 #ifdef COMPILER2
76 #include "code/compiledIC.hpp"
77 #include "compiler/methodLiveness.hpp"
78 #include "opto/compile.hpp"
79 #include "opto/indexSet.hpp"
80 #include "opto/runtime.hpp"
81 #endif
82
83 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
84
85 GrowableArray<Method*>* collected_profiled_methods;
86
87 int compare_methods(Method** a, Method** b) {
88 // %%% there can be 32-bit overflow here
89 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
90 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
91 }
92
93 void collect_profiled_methods(Method* m) {
94 Thread* thread = Thread::current();
95 // This HandleMark prevents a huge amount of handles from being added
96 // to the metadata_handles() array on the thread.
97 HandleMark hm(thread);
98 methodHandle mh(thread, m);
99 if ((m->method_data() != NULL) &&
100 (PrintMethodData || CompilerOracle::should_print(mh))) {
101 collected_profiled_methods->push(m);
102 }
103 }
104
105 void print_method_profiling_data() {
106 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
107 (PrintMethodData || CompilerOracle::should_print_methods())) {
108 ResourceMark rm;
109 HandleMark hm;
110 collected_profiled_methods = new GrowableArray<Method*>(1024);
111 ClassLoaderDataGraph::methods_do(collect_profiled_methods);
112 collected_profiled_methods->sort(&compare_methods);
113
114 int count = collected_profiled_methods->length();
115 int total_size = 0;
116 if (count > 0) {
117 for (int index = 0; index < count; index++) {
118 Method* m = collected_profiled_methods->at(index);
119 ttyLocker ttyl;
120 tty->print_cr("------------------------------------------------------------------------");
121 m->print_invocation_count();
122 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
123 tty->cr();
124 // Dump data on parameters if any
125 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
126 tty->fill_to(2);
127 m->method_data()->parameters_type_data()->print_data_on(tty);
128 }
129 m->print_codes();
130 total_size += m->method_data()->size_in_bytes();
131 }
132 tty->print_cr("------------------------------------------------------------------------");
133 tty->print_cr("Total MDO size: %d bytes", total_size);
134 }
135 }
136 }
137
138
139 #ifndef PRODUCT
140
141 // Statistics printing (method invocation histogram)
142
143 GrowableArray<Method*>* collected_invoked_methods;
144
145 void collect_invoked_methods(Method* m) {
146 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
147 collected_invoked_methods->push(m);
148 }
149 }
150
151
152
153
154 void print_method_invocation_histogram() {
155 ResourceMark rm;
156 HandleMark hm;
157 collected_invoked_methods = new GrowableArray<Method*>(1024);
158 SystemDictionary::methods_do(collect_invoked_methods);
159 collected_invoked_methods->sort(&compare_methods);
160 //
161 tty->cr();
162 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
163 tty->cr();
164 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
165 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
166 synch_total = 0, nativ_total = 0, acces_total = 0;
167 for (int index = 0; index < collected_invoked_methods->length(); index++) {
168 Method* m = collected_invoked_methods->at(index);
169 int c = m->invocation_count() + m->compiled_invocation_count();
170 if (c >= MethodHistogramCutoff) m->print_invocation_count();
171 int_total += m->invocation_count();
172 comp_total += m->compiled_invocation_count();
173 if (m->is_final()) final_total += c;
174 if (m->is_static()) static_total += c;
175 if (m->is_synchronized()) synch_total += c;
176 if (m->is_native()) nativ_total += c;
177 if (m->is_accessor()) acces_total += c;
178 }
179 tty->cr();
180 total = int_total + comp_total;
181 tty->print_cr("Invocations summary:");
182 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
183 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
184 tty->print_cr("\t%9d (100%%) total", total);
185 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
186 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
187 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
188 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
189 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
190 tty->cr();
191 SharedRuntime::print_call_statistics(comp_total);
192 }
193
194 void print_bytecode_count() {
195 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
196 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
197 }
198 }
199
200 AllocStats alloc_stats;
201
202
203
204 // General statistics printing (profiling ...)
205 void print_statistics() {
206 #ifdef ASSERT
207
208 if (CountRuntimeCalls) {
209 extern Histogram *RuntimeHistogram;
210 RuntimeHistogram->print();
211 }
212
213 if (CountJNICalls) {
214 extern Histogram *JNIHistogram;
215 JNIHistogram->print();
216 }
217
218 if (CountJVMCalls) {
219 extern Histogram *JVMHistogram;
220 JVMHistogram->print();
221 }
222
223 #endif
224
225 if (MemProfiling) {
226 MemProfiler::disengage();
227 }
228
229 if (CITime) {
230 CompileBroker::print_times();
231 }
232
233 #ifdef COMPILER1
234 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
235 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
236 Runtime1::print_statistics();
237 Deoptimization::print_statistics();
238 SharedRuntime::print_statistics();
239 nmethod::print_statistics();
240 }
241 #endif /* COMPILER1 */
242
243 #ifdef COMPILER2
244 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
245 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
246 Compile::print_statistics();
247 #ifndef COMPILER1
248 Deoptimization::print_statistics();
249 nmethod::print_statistics();
250 SharedRuntime::print_statistics();
251 #endif //COMPILER1
252 os::print_statistics();
253 }
254
255 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
256 OptoRuntime::print_named_counters();
257 }
258
259 if (TimeLivenessAnalysis) {
260 MethodLiveness::print_times();
261 }
262 #ifdef ASSERT
263 if (CollectIndexSetStatistics) {
264 IndexSet::print_statistics();
265 }
266 #endif // ASSERT
267 #endif // COMPILER2
268 if (CountCompiledCalls) {
269 print_method_invocation_histogram();
270 }
271
272 print_method_profiling_data();
273
274 if (TimeCompilationPolicy) {
275 CompilationPolicy::policy()->print_time();
276 }
277 if (TimeOopMap) {
278 GenerateOopMap::print_time();
279 }
280 if (ProfilerCheckIntervals) {
281 PeriodicTask::print_intervals();
282 }
283 if (PrintSymbolTableSizeHistogram) {
284 SymbolTable::print_histogram();
285 }
286 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
287 BytecodeCounter::print();
288 }
289 if (PrintBytecodePairHistogram) {
290 BytecodePairHistogram::print();
291 }
292
293 if (PrintCodeCache) {
294 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
295 CodeCache::print();
296 }
297
298 if (PrintMethodFlushingStatistics) {
299 NMethodSweeper::print();
300 }
301
302 if (PrintCodeCache2) {
303 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
304 CodeCache::print_internals();
305 }
306
307 if (PrintClassStatistics) {
308 SystemDictionary::print_class_statistics();
309 }
310 if (PrintMethodStatistics) {
311 SystemDictionary::print_method_statistics();
312 }
313
314 if (PrintVtableStats) {
315 klassVtable::print_statistics();
316 klassItable::print_statistics();
317 }
318 if (VerifyOops) {
319 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
320 }
321
322 print_bytecode_count();
323 if (PrintMallocStatistics) {
324 tty->print("allocation stats: ");
325 alloc_stats.print();
326 tty->cr();
327 }
328
329 if (PrintSystemDictionaryAtExit) {
330 SystemDictionary::print();
331 }
332
333 if (PrintMethodUsageAtExit) {
334 Method::print_usage(tty);
335 }
336
337 if (PrintBiasedLockingStatistics) {
338 BiasedLocking::print_counters();
339 }
340
341 #ifdef ENABLE_ZAP_DEAD_LOCALS
342 #ifdef COMPILER2
343 if (ZapDeadCompiledLocals) {
344 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
345 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
346 }
347 #endif // COMPILER2
348 #endif // ENABLE_ZAP_DEAD_LOCALS
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 (PrintMethodUsageAtExit) {
391 Method::print_usage(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 // Hang forever on exit if we're reporting an error.
428 if (ShowMessageBoxOnError && is_error_reported()) {
429 os::infinite_sleep();
430 }
431
432 // Stop the WatcherThread. We do this before disenrolling various
433 // PeriodicTasks to reduce the likelihood of races.
434 if (PeriodicTask::num_tasks() > 0) {
435 WatcherThread::stop();
436 }
437
438 // Print statistics gathered (profiling ...)
439 if (Arguments::has_profile()) {
440 FlatProfiler::disengage();
441 FlatProfiler::print(10);
442 }
443
444 // shut down the StatSampler task
445 StatSampler::disengage();
446 StatSampler::destroy();
447
448 // Stop concurrent GC threads
449 Universe::heap()->stop();
450
451 // Print GC/heap related information.
452 if (PrintGCDetails) {
453 Universe::print();
454 AdaptiveSizePolicyOutput(0);
455 if (Verbose) {
456 ClassLoaderDataGraph::dump_on(gclog_or_tty);
457 }
458 }
459
460 if (PrintBytecodeHistogram) {
461 BytecodeHistogram::print();
462 }
463
464 if (JvmtiExport::should_post_thread_life()) {
465 JvmtiExport::post_thread_end(thread);
466 }
467
468
469 EventThreadEnd event;
470 if (event.should_commit()) {
471 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
472 event.commit();
473 }
474
475 // Always call even when there are not JVMTI environments yet, since environments
476 // may be attached late and JVMTI must track phases of VM execution
477 JvmtiExport::post_vm_death();
478 Threads::shutdown_vm_agents();
479
480 // Terminate the signal thread
481 // Note: we don't wait until it actually dies.
482 os::terminate_signal_thread();
483
484 print_statistics();
485 Universe::heap()->print_tracing_info();
486
487 { MutexLocker ml(BeforeExit_lock);
488 _before_exit_status = BEFORE_EXIT_DONE;
489 BeforeExit_lock->notify_all();
490 }
491
492 if (VerifyStringTableAtExit) {
493 int fail_cnt = 0;
494 {
495 MutexLocker ml(StringTable_lock);
496 fail_cnt = StringTable::verify_and_compare_entries();
497 }
498
499 if (fail_cnt != 0) {
500 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
501 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
502 }
503 }
504
505 #undef BEFORE_EXIT_NOT_RUN
506 #undef BEFORE_EXIT_RUNNING
507 #undef BEFORE_EXIT_DONE
508 }
509
510 void vm_exit(int code) {
511 Thread* thread = ThreadLocalStorage::is_initialized() ?
512 ThreadLocalStorage::get_thread_slow() : NULL;
513 if (thread == NULL) {
514 // we have serious problems -- just exit
515 vm_direct_exit(code);
516 }
517
518 if (VMThread::vm_thread() != NULL) {
519 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
520 VM_Exit op(code);
521 if (thread->is_Java_thread())
522 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
523 VMThread::execute(&op);
524 // should never reach here; but in case something wrong with VM Thread.
525 vm_direct_exit(code);
526 } else {
527 // VM thread is gone, just exit
528 vm_direct_exit(code);
529 }
530 ShouldNotReachHere();
531 }
532
533 void notify_vm_shutdown() {
534 // For now, just a dtrace probe.
535 HOTSPOT_VM_SHUTDOWN();
536 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
537 }
538
539 void vm_direct_exit(int code) {
540 notify_vm_shutdown();
541 os::wait_for_keypress_at_exit();
542 os::exit(code);
543 }
544
545 void vm_perform_shutdown_actions() {
546 // Warning: do not call 'exit_globals()' here. All threads are still running.
547 // Calling 'exit_globals()' will disable thread-local-storage and cause all
548 // kinds of assertions to trigger in debug mode.
549 if (is_init_completed()) {
550 Thread* thread = ThreadLocalStorage::is_initialized() ?
551 ThreadLocalStorage::get_thread_slow() : NULL;
552 if (thread != NULL && thread->is_Java_thread()) {
553 // We are leaving the VM, set state to native (in case any OS exit
554 // handlers call back to the VM)
555 JavaThread* jt = (JavaThread*)thread;
556 // Must always be walkable or have no last_Java_frame when in
557 // thread_in_native
558 jt->frame_anchor()->make_walkable(jt);
559 jt->set_thread_state(_thread_in_native);
560 }
561 }
562 notify_vm_shutdown();
563 }
564
565 void vm_shutdown()
566 {
567 vm_perform_shutdown_actions();
568 os::wait_for_keypress_at_exit();
569 os::shutdown();
570 }
571
572 void vm_abort(bool dump_core) {
573 vm_perform_shutdown_actions();
574 os::wait_for_keypress_at_exit();
575 os::abort(dump_core);
576 ShouldNotReachHere();
577 }
578
579 void vm_notify_during_shutdown(const char* error, const char* message) {
580 if (error != NULL) {
581 tty->print_cr("Error occurred during initialization of VM");
582 tty->print("%s", error);
583 if (message != NULL) {
584 tty->print_cr(": %s", message);
585 }
586 else {
587 tty->cr();
588 }
589 }
590 if (ShowMessageBoxOnError && WizardMode) {
591 fatal("Error occurred during initialization of VM");
592 }
593 }
594
595 void vm_exit_during_initialization(Handle exception) {
596 tty->print_cr("Error occurred during initialization of VM");
597 // If there are exceptions on this thread it must be cleared
598 // first and here. Any future calls to EXCEPTION_MARK requires
599 // that no pending exceptions exist.
600 Thread *THREAD = Thread::current();
601 if (HAS_PENDING_EXCEPTION) {
602 CLEAR_PENDING_EXCEPTION;
603 }
604 java_lang_Throwable::print(exception, tty);
605 tty->cr();
606 java_lang_Throwable::print_stack_trace(exception(), tty);
607 tty->cr();
608 vm_notify_during_shutdown(NULL, NULL);
609
610 // Failure during initialization, we don't want to dump core
611 vm_abort(false);
612 }
613
614 void vm_exit_during_initialization(Symbol* ex, const char* message) {
615 ResourceMark rm;
616 vm_notify_during_shutdown(ex->as_C_string(), message);
617
618 // Failure during initialization, we don't want to dump core
619 vm_abort(false);
620 }
621
622 void vm_exit_during_initialization(const char* error, const char* message) {
623 vm_notify_during_shutdown(error, message);
624
625 // Failure during initialization, we don't want to dump core
626 vm_abort(false);
627 }
628
629 void vm_shutdown_during_initialization(const char* error, const char* message) {
630 vm_notify_during_shutdown(error, message);
631 vm_shutdown();
632 }
633
634 JDK_Version JDK_Version::_current;
635 const char* JDK_Version::_runtime_name;
636 const char* JDK_Version::_runtime_version;
637
638 void JDK_Version::initialize() {
639 jdk_version_info info;
640 assert(!_current.is_valid(), "Don't initialize twice");
641
642 void *lib_handle = os::native_java_library();
643 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
644 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
645
646 if (func == NULL) {
647 // JDK older than 1.6
648 _current._partially_initialized = true;
649 } else {
650 (*func)(&info, sizeof(info));
651
652 int major = JDK_VERSION_MAJOR(info.jdk_version);
653 int minor = JDK_VERSION_MINOR(info.jdk_version);
654 int micro = JDK_VERSION_MICRO(info.jdk_version);
655 int build = JDK_VERSION_BUILD(info.jdk_version);
656 if (major == 1 && minor > 4) {
657 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
658 major = minor;
659 minor = micro;
660 micro = 0;
661 }
662 _current = JDK_Version(major, minor, micro, info.update_version,
663 info.special_update_version, build,
664 info.thread_park_blocker == 1,
665 info.post_vm_init_hook_enabled == 1,
666 info.pending_list_uses_discovered_field == 1);
667 }
668 }
669
670 void JDK_Version::fully_initialize(
671 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
672 // This is only called when current is less than 1.6 and we've gotten
673 // far enough in the initialization to determine the exact version.
674 assert(major < 6, "not needed for JDK version >= 6");
675 assert(is_partially_initialized(), "must not initialize");
676 if (major < 5) {
677 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
678 micro = minor;
679 minor = major;
680 major = 1;
681 }
682 _current = JDK_Version(major, minor, micro, update);
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 * 5)) |
692 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
693 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
694 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
695 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
696 ((int64_t)v.build_number() << (BitsPerByte * 0));
697 }
698
699 int JDK_Version::compare(const JDK_Version& other) const {
700 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
701 if (!is_partially_initialized() && other.is_partially_initialized()) {
702 return -(other.compare(*this)); // flip the comparators
703 }
704 assert(!other.is_partially_initialized(), "Not initialized yet");
705 if (is_partially_initialized()) {
706 assert(other.major_version() >= 6,
707 "Invalid JDK version comparison during initialization");
708 return -1;
709 } else {
710 uint64_t e = encode_jdk_version(*this);
711 uint64_t o = encode_jdk_version(other);
712 return (e > o) ? 1 : ((e == o) ? 0 : -1);
713 }
714 }
715
716 void JDK_Version::to_string(char* buffer, size_t buflen) const {
717 assert(buffer && buflen > 0, "call with useful buffer");
718 size_t index = 0;
719
720 if (!is_valid()) {
721 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
722 } else if (is_partially_initialized()) {
723 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
724 } else {
725 int rc = jio_snprintf(
726 &buffer[index], buflen - index, "%d.%d", _major, _minor);
727 if (rc == -1) return;
728 index += rc;
729 if (_micro > 0) {
730 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
731 }
732 if (_update > 0) {
733 rc = jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
734 if (rc == -1) return;
735 index += rc;
736 }
737 if (_special > 0) {
738 rc = jio_snprintf(&buffer[index], buflen - index, "%c", _special);
739 if (rc == -1) return;
740 index += rc;
741 }
742 if (_build > 0) {
743 rc = jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
744 if (rc == -1) return;
745 index += rc;
746 }
747 }
748 }