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/fprofiler.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.hpp"
55 #include "runtime/java.hpp"
56 #include "runtime/memprofiler.hpp"
57 #include "runtime/sharedRuntime.hpp"
58 #include "runtime/statSampler.hpp"
59 #include "runtime/sweeper.hpp"
60 #include "runtime/task.hpp"
61 #include "runtime/thread.inline.hpp"
62 #include "runtime/timer.hpp"
63 #include "runtime/vm_operations.hpp"
64 #include "services/memTracker.hpp"
65 #include "trace/tracing.hpp"
66 #include "utilities/dtrace.hpp"
67 #include "utilities/globalDefinitions.hpp"
68 #include "utilities/histogram.hpp"
69 #include "utilities/macros.hpp"
70 #include "utilities/vmError.hpp"
71 #if INCLUDE_ALL_GCS
72 #include "gc/cms/concurrentMarkSweepThread.hpp"
73 #include "gc/parallel/psScavenge.hpp"
74 #endif // INCLUDE_ALL_GCS
75 #ifdef COMPILER1
76 #include "c1/c1_Compiler.hpp"
77 #include "c1/c1_Runtime1.hpp"
78 #endif
79 #ifdef COMPILER2
80 #include "code/compiledIC.hpp"
81 #include "compiler/methodLiveness.hpp"
82 #include "opto/compile.hpp"
83 #include "opto/indexSet.hpp"
84 #include "opto/runtime.hpp"
85 #endif
86
87 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
88
89 GrowableArray<Method*>* collected_profiled_methods;
90
91 int compare_methods(Method** a, Method** b) {
92 // %%% there can be 32-bit overflow here
93 return ((*b)->invocation_count() + (*b)->compiled_invocation_count())
94 - ((*a)->invocation_count() + (*a)->compiled_invocation_count());
95 }
96
97 void collect_profiled_methods(Method* m) {
98 Thread* thread = Thread::current();
99 // This HandleMark prevents a huge amount of handles from being added
100 // to the metadata_handles() array on the thread.
101 HandleMark hm(thread);
102 methodHandle mh(thread, m);
103 if ((m->method_data() != NULL) &&
104 (PrintMethodData || CompilerOracle::should_print(mh))) {
105 collected_profiled_methods->push(m);
106 }
107 }
108
109 void print_method_profiling_data() {
110 if (ProfileInterpreter COMPILER1_PRESENT(|| C1UpdateMethodData) &&
111 (PrintMethodData || CompilerOracle::should_print_methods())) {
112 ResourceMark rm;
113 HandleMark hm;
114 collected_profiled_methods = new GrowableArray<Method*>(1024);
115 ClassLoaderDataGraph::methods_do(collect_profiled_methods);
116 collected_profiled_methods->sort(&compare_methods);
117
118 int count = collected_profiled_methods->length();
119 int total_size = 0;
120 if (count > 0) {
121 for (int index = 0; index < count; index++) {
122 Method* m = collected_profiled_methods->at(index);
123 ttyLocker ttyl;
124 tty->print_cr("------------------------------------------------------------------------");
125 m->print_invocation_count();
126 tty->print_cr(" mdo size: %d bytes", m->method_data()->size_in_bytes());
127 tty->cr();
128 // Dump data on parameters if any
129 if (m->method_data() != NULL && m->method_data()->parameters_type_data() != NULL) {
130 tty->fill_to(2);
131 m->method_data()->parameters_type_data()->print_data_on(tty);
132 }
133 m->print_codes();
134 total_size += m->method_data()->size_in_bytes();
135 }
136 tty->print_cr("------------------------------------------------------------------------");
137 tty->print_cr("Total MDO size: %d bytes", total_size);
138 }
139 }
140 }
141
142
143 #ifndef PRODUCT
144
145 // Statistics printing (method invocation histogram)
146
147 GrowableArray<Method*>* collected_invoked_methods;
148
149 void collect_invoked_methods(Method* m) {
150 if (m->invocation_count() + m->compiled_invocation_count() >= 1 ) {
151 collected_invoked_methods->push(m);
152 }
153 }
154
155
156
157
158 void print_method_invocation_histogram() {
159 ResourceMark rm;
160 HandleMark hm;
161 collected_invoked_methods = new GrowableArray<Method*>(1024);
162 SystemDictionary::methods_do(collect_invoked_methods);
163 collected_invoked_methods->sort(&compare_methods);
164 //
165 tty->cr();
166 tty->print_cr("Histogram Over MethodOop Invocation Counters (cutoff = %d):", MethodHistogramCutoff);
167 tty->cr();
168 tty->print_cr("____Count_(I+C)____Method________________________Module_________________");
169 unsigned total = 0, int_total = 0, comp_total = 0, static_total = 0, final_total = 0,
170 synch_total = 0, nativ_total = 0, acces_total = 0;
171 for (int index = 0; index < collected_invoked_methods->length(); index++) {
172 Method* m = collected_invoked_methods->at(index);
173 int c = m->invocation_count() + m->compiled_invocation_count();
174 if (c >= MethodHistogramCutoff) m->print_invocation_count();
175 int_total += m->invocation_count();
176 comp_total += m->compiled_invocation_count();
177 if (m->is_final()) final_total += c;
178 if (m->is_static()) static_total += c;
179 if (m->is_synchronized()) synch_total += c;
180 if (m->is_native()) nativ_total += c;
181 if (m->is_accessor()) acces_total += c;
182 }
183 tty->cr();
184 total = int_total + comp_total;
185 tty->print_cr("Invocations summary:");
186 tty->print_cr("\t%9d (%4.1f%%) interpreted", int_total, 100.0 * int_total / total);
187 tty->print_cr("\t%9d (%4.1f%%) compiled", comp_total, 100.0 * comp_total / total);
188 tty->print_cr("\t%9d (100%%) total", total);
189 tty->print_cr("\t%9d (%4.1f%%) synchronized", synch_total, 100.0 * synch_total / total);
190 tty->print_cr("\t%9d (%4.1f%%) final", final_total, 100.0 * final_total / total);
191 tty->print_cr("\t%9d (%4.1f%%) static", static_total, 100.0 * static_total / total);
192 tty->print_cr("\t%9d (%4.1f%%) native", nativ_total, 100.0 * nativ_total / total);
193 tty->print_cr("\t%9d (%4.1f%%) accessor", acces_total, 100.0 * acces_total / total);
194 tty->cr();
195 SharedRuntime::print_call_statistics(comp_total);
196 }
197
198 void print_bytecode_count() {
199 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
200 tty->print_cr("[BytecodeCounter::counter_value = %d]", BytecodeCounter::counter_value());
201 }
202 }
203
204 AllocStats alloc_stats;
205
206
207
208 // General statistics printing (profiling ...)
209 void print_statistics() {
210 #ifdef ASSERT
211
212 if (CountRuntimeCalls) {
213 extern Histogram *RuntimeHistogram;
214 RuntimeHistogram->print();
215 }
216
217 if (CountJNICalls) {
218 extern Histogram *JNIHistogram;
219 JNIHistogram->print();
220 }
221
222 if (CountJVMCalls) {
223 extern Histogram *JVMHistogram;
224 JVMHistogram->print();
225 }
226
227 #endif
228
229 if (MemProfiling) {
230 MemProfiler::disengage();
231 }
232
233 if (CITime) {
234 CompileBroker::print_times();
235 }
236
237 #ifdef COMPILER1
238 if ((PrintC1Statistics || LogVMOutput || LogCompilation) && UseCompiler) {
239 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintC1Statistics);
240 Runtime1::print_statistics();
241 Deoptimization::print_statistics();
242 SharedRuntime::print_statistics();
243 }
244 #endif /* COMPILER1 */
245
246 #ifdef COMPILER2
247 if ((PrintOptoStatistics || LogVMOutput || LogCompilation) && UseCompiler) {
248 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && PrintOptoStatistics);
249 Compile::print_statistics();
250 #ifndef COMPILER1
251 Deoptimization::print_statistics();
252 SharedRuntime::print_statistics();
253 #endif //COMPILER1
254 os::print_statistics();
255 }
256
257 if (PrintLockStatistics || PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
258 OptoRuntime::print_named_counters();
259 }
260
261 if (TimeLivenessAnalysis) {
262 MethodLiveness::print_times();
263 }
264 #ifdef ASSERT
265 if (CollectIndexSetStatistics) {
266 IndexSet::print_statistics();
267 }
268 #endif // ASSERT
269 #else
270 #ifdef INCLUDE_JVMCI
271 #ifndef COMPILER1
272 if ((TraceDeoptimization || LogVMOutput || LogCompilation) && UseCompiler) {
273 FlagSetting fs(DisplayVMOutput, DisplayVMOutput && TraceDeoptimization);
274 Deoptimization::print_statistics();
275 SharedRuntime::print_statistics();
276 }
277 #endif
278 #endif
279 #endif
280
281 if (PrintNMethodStatistics) {
282 nmethod::print_statistics();
283 }
284 if (CountCompiledCalls) {
285 print_method_invocation_histogram();
286 }
287
288 print_method_profiling_data();
289
290 if (TimeCompilationPolicy) {
291 CompilationPolicy::policy()->print_time();
292 }
293 if (TimeOopMap) {
294 GenerateOopMap::print_time();
295 }
296 if (ProfilerCheckIntervals) {
297 PeriodicTask::print_intervals();
298 }
299 if (PrintSymbolTableSizeHistogram) {
300 SymbolTable::print_histogram();
301 }
302 if (CountBytecodes || TraceBytecodes || StopInterpreterAt) {
303 BytecodeCounter::print();
304 }
305 if (PrintBytecodePairHistogram) {
306 BytecodePairHistogram::print();
307 }
308
309 if (PrintCodeCache) {
310 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
311 CodeCache::print();
312 }
313
314 if (PrintMethodFlushingStatistics) {
315 NMethodSweeper::print();
316 }
317
318 if (PrintCodeCache2) {
319 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
320 CodeCache::print_internals();
321 }
322
323 if (PrintVtableStats) {
324 klassVtable::print_statistics();
325 klassItable::print_statistics();
326 }
327 if (VerifyOops) {
328 tty->print_cr("+VerifyOops count: %d", StubRoutines::verify_oop_count());
329 }
330
331 print_bytecode_count();
332 if (PrintMallocStatistics) {
333 tty->print("allocation stats: ");
334 alloc_stats.print();
335 tty->cr();
336 }
337
338 if (PrintSystemDictionaryAtExit) {
339 SystemDictionary::print();
340 }
341
342 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
343 Method::print_touched_methods(tty);
344 }
345
346 if (PrintBiasedLockingStatistics) {
347 BiasedLocking::print_counters();
348 }
349
350 #ifdef ENABLE_ZAP_DEAD_LOCALS
351 #ifdef COMPILER2
352 if (ZapDeadCompiledLocals) {
353 tty->print_cr("Compile::CompiledZap_count = %d", Compile::CompiledZap_count);
354 tty->print_cr("OptoRuntime::ZapDeadCompiledLocals_count = %d", OptoRuntime::ZapDeadCompiledLocals_count);
355 }
356 #endif // COMPILER2
357 #endif // ENABLE_ZAP_DEAD_LOCALS
358 // Native memory tracking data
359 if (PrintNMTStatistics) {
360 MemTracker::final_report(tty);
361 }
362 }
363
364 #else // PRODUCT MODE STATISTICS
365
366 void print_statistics() {
367
368 if (PrintMethodData) {
369 print_method_profiling_data();
370 }
371
372 if (CITime) {
373 CompileBroker::print_times();
374 }
375
376 if (PrintCodeCache) {
377 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
378 CodeCache::print();
379 }
380
381 if (PrintMethodFlushingStatistics) {
382 NMethodSweeper::print();
383 }
384
385 #ifdef COMPILER2
386 if (PrintPreciseBiasedLockingStatistics || PrintPreciseRTMLockingStatistics) {
387 OptoRuntime::print_named_counters();
388 }
389 #endif
390 if (PrintBiasedLockingStatistics) {
391 BiasedLocking::print_counters();
392 }
393
394 // Native memory tracking data
395 if (PrintNMTStatistics) {
396 MemTracker::final_report(tty);
397 }
398
399 if (LogTouchedMethods && PrintTouchedMethodsAtExit) {
400 Method::print_touched_methods(tty);
401 }
402 }
403
404 #endif
405
406 // Note: before_exit() can be executed only once, if more than one threads
407 // are trying to shutdown the VM at the same time, only one thread
408 // can run before_exit() and all other threads must wait.
409 void before_exit(JavaThread * thread) {
410 #define BEFORE_EXIT_NOT_RUN 0
411 #define BEFORE_EXIT_RUNNING 1
412 #define BEFORE_EXIT_DONE 2
413 static jint volatile _before_exit_status = BEFORE_EXIT_NOT_RUN;
414
415 // Note: don't use a Mutex to guard the entire before_exit(), as
416 // JVMTI post_thread_end_event and post_vm_death_event will run native code.
417 // A CAS or OSMutex would work just fine but then we need to manipulate
418 // thread state for Safepoint. Here we use Monitor wait() and notify_all()
419 // for synchronization.
420 { MutexLocker ml(BeforeExit_lock);
421 switch (_before_exit_status) {
422 case BEFORE_EXIT_NOT_RUN:
423 _before_exit_status = BEFORE_EXIT_RUNNING;
424 break;
425 case BEFORE_EXIT_RUNNING:
426 while (_before_exit_status == BEFORE_EXIT_RUNNING) {
427 BeforeExit_lock->wait();
428 }
429 assert(_before_exit_status == BEFORE_EXIT_DONE, "invalid state");
430 return;
431 case BEFORE_EXIT_DONE:
432 return;
433 }
434 }
435
436 #if INCLUDE_JVMCI
437 JVMCIRuntime::shutdown();
438 #endif
439
440 // Hang forever on exit if we're reporting an error.
441 if (ShowMessageBoxOnError && is_error_reported()) {
442 os::infinite_sleep();
443 }
444
445 // Stop the WatcherThread. We do this before disenrolling various
446 // PeriodicTasks to reduce the likelihood of races.
447 if (PeriodicTask::num_tasks() > 0) {
448 WatcherThread::stop();
449 }
450
451 // Print statistics gathered (profiling ...)
452 if (Arguments::has_profile()) {
453 FlatProfiler::disengage();
454 FlatProfiler::print(10);
455 }
456
457 // shut down the StatSampler task
458 StatSampler::disengage();
459 StatSampler::destroy();
460
461 // Stop concurrent GC threads
462 Universe::heap()->stop();
463
464 // Print GC/heap related information.
465 if (PrintGCDetails) {
466 Universe::print();
467 AdaptiveSizePolicyOutput(0);
468 if (Verbose) {
469 ClassLoaderDataGraph::dump_on(gclog_or_tty);
470 }
471 }
472
473 if (PrintBytecodeHistogram) {
474 BytecodeHistogram::print();
475 }
476
477 if (JvmtiExport::should_post_thread_life()) {
478 JvmtiExport::post_thread_end(thread);
479 }
480
481
482 EventThreadEnd event;
483 if (event.should_commit()) {
484 event.set_javalangthread(java_lang_Thread::thread_id(thread->threadObj()));
485 event.commit();
486 }
487
488 // Always call even when there are not JVMTI environments yet, since environments
489 // may be attached late and JVMTI must track phases of VM execution
490 JvmtiExport::post_vm_death();
491 Threads::shutdown_vm_agents();
492
493 // Terminate the signal thread
494 // Note: we don't wait until it actually dies.
495 os::terminate_signal_thread();
496
497 print_statistics();
498 Universe::heap()->print_tracing_info();
499
500 { MutexLocker ml(BeforeExit_lock);
501 _before_exit_status = BEFORE_EXIT_DONE;
502 BeforeExit_lock->notify_all();
503 }
504
505 if (VerifyStringTableAtExit) {
506 int fail_cnt = 0;
507 {
508 MutexLocker ml(StringTable_lock);
509 fail_cnt = StringTable::verify_and_compare_entries();
510 }
511
512 if (fail_cnt != 0) {
513 tty->print_cr("ERROR: fail_cnt=%d", fail_cnt);
514 guarantee(fail_cnt == 0, "unexpected StringTable verification failures");
515 }
516 }
517
518 #undef BEFORE_EXIT_NOT_RUN
519 #undef BEFORE_EXIT_RUNNING
520 #undef BEFORE_EXIT_DONE
521 }
522
523 void vm_exit(int code) {
524 Thread* thread = ThreadLocalStorage::is_initialized() ?
525 ThreadLocalStorage::get_thread_slow() : NULL;
526 if (thread == NULL) {
527 // we have serious problems -- just exit
528 vm_direct_exit(code);
529 }
530
531 if (VMThread::vm_thread() != NULL) {
532 // Fire off a VM_Exit operation to bring VM to a safepoint and exit
533 VM_Exit op(code);
534 if (thread->is_Java_thread())
535 ((JavaThread*)thread)->set_thread_state(_thread_in_vm);
536 VMThread::execute(&op);
537 // should never reach here; but in case something wrong with VM Thread.
538 vm_direct_exit(code);
539 } else {
540 // VM thread is gone, just exit
541 vm_direct_exit(code);
542 }
543 ShouldNotReachHere();
544 }
545
546 void notify_vm_shutdown() {
547 // For now, just a dtrace probe.
548 HOTSPOT_VM_SHUTDOWN();
549 HS_DTRACE_WORKAROUND_TAIL_CALL_BUG();
550 }
551
552 void vm_direct_exit(int code) {
553 notify_vm_shutdown();
554 os::wait_for_keypress_at_exit();
555 os::exit(code);
556 }
557
558 void vm_perform_shutdown_actions() {
559 // Warning: do not call 'exit_globals()' here. All threads are still running.
560 // Calling 'exit_globals()' will disable thread-local-storage and cause all
561 // kinds of assertions to trigger in debug mode.
562 if (is_init_completed()) {
563 Thread* thread = ThreadLocalStorage::is_initialized() ?
564 ThreadLocalStorage::get_thread_slow() : NULL;
565 if (thread != NULL && thread->is_Java_thread()) {
566 // We are leaving the VM, set state to native (in case any OS exit
567 // handlers call back to the VM)
568 JavaThread* jt = (JavaThread*)thread;
569 // Must always be walkable or have no last_Java_frame when in
570 // thread_in_native
571 jt->frame_anchor()->make_walkable(jt);
572 jt->set_thread_state(_thread_in_native);
573 }
574 }
575 notify_vm_shutdown();
576 }
577
578 void vm_shutdown()
579 {
580 vm_perform_shutdown_actions();
581 os::wait_for_keypress_at_exit();
582 os::shutdown();
583 }
584
585 void vm_abort(bool dump_core) {
586 vm_perform_shutdown_actions();
587 os::wait_for_keypress_at_exit();
588 os::abort(dump_core);
589 ShouldNotReachHere();
590 }
591
592 void vm_notify_during_shutdown(const char* error, const char* message) {
593 if (error != NULL) {
594 tty->print_cr("Error occurred during initialization of VM");
595 tty->print("%s", error);
596 if (message != NULL) {
597 tty->print_cr(": %s", message);
598 }
599 else {
600 tty->cr();
601 }
602 }
603 if (ShowMessageBoxOnError && WizardMode) {
604 fatal("Error occurred during initialization of VM");
605 }
606 }
607
608 void vm_exit_during_initialization(Handle exception) {
609 tty->print_cr("Error occurred during initialization of VM");
610 // If there are exceptions on this thread it must be cleared
611 // first and here. Any future calls to EXCEPTION_MARK requires
612 // that no pending exceptions exist.
613 Thread *THREAD = Thread::current();
614 if (HAS_PENDING_EXCEPTION) {
615 CLEAR_PENDING_EXCEPTION;
616 }
617 java_lang_Throwable::print(exception, tty);
618 tty->cr();
619 java_lang_Throwable::print_stack_trace(exception(), tty);
620 tty->cr();
621 vm_notify_during_shutdown(NULL, NULL);
622
623 // Failure during initialization, we don't want to dump core
624 vm_abort(false);
625 }
626
627 void vm_exit_during_initialization(Symbol* ex, const char* message) {
628 ResourceMark rm;
629 vm_notify_during_shutdown(ex->as_C_string(), message);
630
631 // Failure during initialization, we don't want to dump core
632 vm_abort(false);
633 }
634
635 void vm_exit_during_initialization(const char* error, const char* message) {
636 vm_notify_during_shutdown(error, message);
637
638 // Failure during initialization, we don't want to dump core
639 vm_abort(false);
640 }
641
642 void vm_shutdown_during_initialization(const char* error, const char* message) {
643 vm_notify_during_shutdown(error, message);
644 vm_shutdown();
645 }
646
647 JDK_Version JDK_Version::_current;
648 const char* JDK_Version::_runtime_name;
649 const char* JDK_Version::_runtime_version;
650
651 void JDK_Version::initialize() {
652 jdk_version_info info;
653 assert(!_current.is_valid(), "Don't initialize twice");
654
655 void *lib_handle = os::native_java_library();
656 jdk_version_info_fn_t func = CAST_TO_FN_PTR(jdk_version_info_fn_t,
657 os::dll_lookup(lib_handle, "JDK_GetVersionInfo0"));
658
659 if (func == NULL) {
660 // JDK older than 1.6
661 _current._partially_initialized = true;
662 } else {
663 (*func)(&info, sizeof(info));
664
665 int major = JDK_VERSION_MAJOR(info.jdk_version);
666 int minor = JDK_VERSION_MINOR(info.jdk_version);
667 int micro = JDK_VERSION_MICRO(info.jdk_version);
668 int build = JDK_VERSION_BUILD(info.jdk_version);
669 if (major == 1 && minor > 4) {
670 // We represent "1.5.0" as "5.0", but 1.4.2 as itself.
671 major = minor;
672 minor = micro;
673 micro = 0;
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, micro, info.update_version,
681 info.special_update_version, build,
682 info.thread_park_blocker == 1,
683 info.post_vm_init_hook_enabled == 1);
684 }
685 }
686
687 void JDK_Version::fully_initialize(
688 uint8_t major, uint8_t minor, uint8_t micro, uint8_t update) {
689 // This is only called when current is less than 1.6 and we've gotten
690 // far enough in the initialization to determine the exact version.
691 assert(major < 6, "not needed for JDK version >= 6");
692 assert(is_partially_initialized(), "must not initialize");
693 if (major < 5) {
694 // JDK verison sequence: 1.2.x, 1.3.x, 1.4.x, 5.0.x, 6.0.x, etc.
695 micro = minor;
696 minor = major;
697 major = 1;
698 }
699 _current = JDK_Version(major, minor, micro, update);
700 }
701
702 void JDK_Version_init() {
703 JDK_Version::initialize();
704 }
705
706 static int64_t encode_jdk_version(const JDK_Version& v) {
707 return
708 ((int64_t)v.major_version() << (BitsPerByte * 5)) |
709 ((int64_t)v.minor_version() << (BitsPerByte * 4)) |
710 ((int64_t)v.micro_version() << (BitsPerByte * 3)) |
711 ((int64_t)v.update_version() << (BitsPerByte * 2)) |
712 ((int64_t)v.special_update_version() << (BitsPerByte * 1)) |
713 ((int64_t)v.build_number() << (BitsPerByte * 0));
714 }
715
716 int JDK_Version::compare(const JDK_Version& other) const {
717 assert(is_valid() && other.is_valid(), "Invalid version (uninitialized?)");
718 if (!is_partially_initialized() && other.is_partially_initialized()) {
719 return -(other.compare(*this)); // flip the comparators
720 }
721 assert(!other.is_partially_initialized(), "Not initialized yet");
722 if (is_partially_initialized()) {
723 assert(other.major_version() >= 6,
724 "Invalid JDK version comparison during initialization");
725 return -1;
726 } else {
727 uint64_t e = encode_jdk_version(*this);
728 uint64_t o = encode_jdk_version(other);
729 return (e > o) ? 1 : ((e == o) ? 0 : -1);
730 }
731 }
732
733 void JDK_Version::to_string(char* buffer, size_t buflen) const {
734 assert(buffer && buflen > 0, "call with useful buffer");
735 size_t index = 0;
736
737 if (!is_valid()) {
738 jio_snprintf(buffer, buflen, "%s", "(uninitialized)");
739 } else if (is_partially_initialized()) {
740 jio_snprintf(buffer, buflen, "%s", "(uninitialized) pre-1.6.0");
741 } else {
742 int rc = jio_snprintf(
743 &buffer[index], buflen - index, "%d.%d", _major, _minor);
744 if (rc == -1) return;
745 index += rc;
746 if (_micro > 0) {
747 rc = jio_snprintf(&buffer[index], buflen - index, ".%d", _micro);
748 }
749 if (_update > 0) {
750 rc = jio_snprintf(&buffer[index], buflen - index, "_%02d", _update);
751 if (rc == -1) return;
752 index += rc;
753 }
754 if (_special > 0) {
755 rc = jio_snprintf(&buffer[index], buflen - index, "%c", _special);
756 if (rc == -1) return;
757 index += rc;
758 }
759 if (_build > 0) {
760 rc = jio_snprintf(&buffer[index], buflen - index, "-b%02d", _build);
761 if (rc == -1) return;
762 index += rc;
763 }
764 }
765 }