1 /*
2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/codeHeapState.hpp"
32 #include "code/dependencyContext.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/compileLog.hpp"
35 #include "compiler/compilerOracle.hpp"
36 #include "compiler/directivesParser.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "jfr/jfrEvents.hpp"
39 #include "logging/log.hpp"
40 #include "logging/logStream.hpp"
41 #include "memory/allocation.inline.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "oops/methodData.hpp"
44 #include "oops/method.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "prims/whitebox.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/atomic.hpp"
50 #include "runtime/compilationPolicy.hpp"
51 #include "runtime/init.hpp"
52 #include "runtime/interfaceSupport.inline.hpp"
53 #include "runtime/javaCalls.hpp"
54 #include "runtime/jniHandles.inline.hpp"
55 #include "runtime/os.hpp"
56 #include "runtime/safepointVerifiers.hpp"
57 #include "runtime/sharedRuntime.hpp"
58 #include "runtime/sweeper.hpp"
59 #include "runtime/timerTrace.hpp"
60 #include "runtime/vframe.inline.hpp"
61 #include "utilities/debug.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/formatBuffer.hpp"
65 #include "utilities/macros.hpp"
66 #ifdef COMPILER1
67 #include "c1/c1_Compiler.hpp"
68 #endif
69 #if INCLUDE_JVMCI
70 #include "jvmci/jvmciCompiler.hpp"
71 #include "jvmci/jvmciRuntime.hpp"
72 #include "jvmci/jvmciJavaClasses.hpp"
73 #include "runtime/vframe.hpp"
74 #endif
75 #ifdef COMPILER2
76 #include "opto/c2compiler.hpp"
77 #endif
78
79 #ifdef DTRACE_ENABLED
80
81 // Only bother with this argument setup if dtrace is available
82
83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
84 { \
85 Symbol* klass_name = (method)->klass_name(); \
86 Symbol* name = (method)->name(); \
87 Symbol* signature = (method)->signature(); \
88 HOTSPOT_METHOD_COMPILE_BEGIN( \
89 (char *) comp_name, strlen(comp_name), \
90 (char *) klass_name->bytes(), klass_name->utf8_length(), \
91 (char *) name->bytes(), name->utf8_length(), \
92 (char *) signature->bytes(), signature->utf8_length()); \
93 }
94
95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
96 { \
97 Symbol* klass_name = (method)->klass_name(); \
98 Symbol* name = (method)->name(); \
99 Symbol* signature = (method)->signature(); \
100 HOTSPOT_METHOD_COMPILE_END( \
101 (char *) comp_name, strlen(comp_name), \
102 (char *) klass_name->bytes(), klass_name->utf8_length(), \
103 (char *) name->bytes(), name->utf8_length(), \
104 (char *) signature->bytes(), signature->utf8_length(), (success)); \
105 }
106
107 #else // ndef DTRACE_ENABLED
108
109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
111
112 #endif // ndef DTRACE_ENABLED
113
114 bool CompileBroker::_initialized = false;
115 volatile bool CompileBroker::_should_block = false;
116 volatile int CompileBroker::_print_compilation_warning = 0;
117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
118
119 // The installed compiler(s)
120 AbstractCompiler* CompileBroker::_compilers[2];
121
122 // The maximum numbers of compiler threads to be determined during startup.
123 int CompileBroker::_c1_count = 0;
124 int CompileBroker::_c2_count = 0;
125
126 // An array of compiler names as Java String objects
127 jobject* CompileBroker::_compiler1_objects = NULL;
128 jobject* CompileBroker::_compiler2_objects = NULL;
129
130 CompileLog** CompileBroker::_compiler1_logs = NULL;
131 CompileLog** CompileBroker::_compiler2_logs = NULL;
132
133 // These counters are used to assign an unique ID to each compilation.
134 volatile jint CompileBroker::_compilation_id = 0;
135 volatile jint CompileBroker::_osr_compilation_id = 0;
136
137 // Debugging information
138 int CompileBroker::_last_compile_type = no_compile;
139 int CompileBroker::_last_compile_level = CompLevel_none;
140 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
141
142 // Performance counters
143 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
144 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
145 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
146
147 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
148 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
152
153 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
154 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
155 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
156 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
157
158 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
159 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
160 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
161 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
162 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
163 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
164 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
165
166 // Timers and counters for generating statistics
167 elapsedTimer CompileBroker::_t_total_compilation;
168 elapsedTimer CompileBroker::_t_osr_compilation;
169 elapsedTimer CompileBroker::_t_standard_compilation;
170 elapsedTimer CompileBroker::_t_invalidated_compilation;
171 elapsedTimer CompileBroker::_t_bailedout_compilation;
172
173 int CompileBroker::_total_bailout_count = 0;
174 int CompileBroker::_total_invalidated_count = 0;
175 int CompileBroker::_total_compile_count = 0;
176 int CompileBroker::_total_osr_compile_count = 0;
177 int CompileBroker::_total_standard_compile_count = 0;
178
179 int CompileBroker::_sum_osr_bytes_compiled = 0;
180 int CompileBroker::_sum_standard_bytes_compiled = 0;
181 int CompileBroker::_sum_nmethod_size = 0;
182 int CompileBroker::_sum_nmethod_code_size = 0;
183
184 long CompileBroker::_peak_compilation_time = 0;
185
186 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
187 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
188
189
190
191 class CompilationLog : public StringEventLog {
192 public:
193 CompilationLog() : StringEventLog("Compilation events") {
194 }
195
196 void log_compile(JavaThread* thread, CompileTask* task) {
197 StringLogMessage lm;
198 stringStream sstr = lm.stream();
199 // msg.time_stamp().update_to(tty->time_stamp().ticks());
200 task->print(&sstr, NULL, true, false);
201 log(thread, "%s", (const char*)lm);
202 }
203
204 void log_nmethod(JavaThread* thread, nmethod* nm) {
205 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
206 nm->compile_id(), nm->is_osr_method() ? "%" : "",
207 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
208 }
209
210 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
211 StringLogMessage lm;
212 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
213 if (retry_message != NULL) {
214 lm.append(" (%s)", retry_message);
215 }
216 lm.print("\n");
217 log(thread, "%s", (const char*)lm);
218 }
219
220 void log_metaspace_failure(const char* reason) {
221 ResourceMark rm;
222 StringLogMessage lm;
223 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
224 lm.print("\n");
225 log(JavaThread::current(), "%s", (const char*)lm);
226 }
227 };
228
229 static CompilationLog* _compilation_log = NULL;
230
231 bool compileBroker_init() {
232 if (LogEvents) {
233 _compilation_log = new CompilationLog();
234 }
235
236 // init directives stack, adding default directive
237 DirectivesStack::init();
238
239 if (DirectivesParser::has_file()) {
240 return DirectivesParser::parse_from_flag();
241 } else if (CompilerDirectivesPrint) {
242 // Print default directive even when no other was added
243 DirectivesStack::print(tty);
244 }
245
246 return true;
247 }
248
249 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
250 CompilerThread* thread = CompilerThread::current();
251 thread->set_task(task);
252 #if INCLUDE_JVMCI
253 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
254 task->set_jvmci_compiler_thread(thread);
255 }
256 #endif
257 CompileLog* log = thread->log();
258 if (log != NULL) task->log_task_start(log);
259 }
260
261 CompileTaskWrapper::~CompileTaskWrapper() {
262 CompilerThread* thread = CompilerThread::current();
263 CompileTask* task = thread->task();
264 CompileLog* log = thread->log();
265 if (log != NULL) task->log_task_done(log);
266 thread->set_task(NULL);
267 task->set_code_handle(NULL);
268 thread->set_env(NULL);
269 if (task->is_blocking()) {
270 bool free_task = false;
271 {
272 MutexLocker notifier(task->lock(), thread);
273 task->mark_complete();
274 #if INCLUDE_JVMCI
275 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
276 if (!task->has_waiter()) {
277 // The waiting thread timed out and thus did not free the task.
278 free_task = true;
279 }
280 task->set_jvmci_compiler_thread(NULL);
281 }
282 #endif
283 if (!free_task) {
284 // Notify the waiting thread that the compilation has completed
285 // so that it can free the task.
286 task->lock()->notify_all();
287 }
288 }
289 if (free_task) {
290 // The task can only be freed once the task lock is released.
291 CompileTask::free(task);
292 }
293 } else {
294 task->mark_complete();
295
296 // By convention, the compiling thread is responsible for
297 // recycling a non-blocking CompileTask.
298 CompileTask::free(task);
299 }
300 }
301
302 /**
303 * Check if a CompilerThread can be removed and update count if requested.
304 */
305 static bool can_remove(CompilerThread *ct, bool do_it) {
306 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
307 if (!ReduceNumberOfCompilerThreads) return false;
308
309 AbstractCompiler *compiler = ct->compiler();
310 int compiler_count = compiler->num_compiler_threads();
311 bool c1 = compiler->is_c1();
312
313 // Keep at least 1 compiler thread of each type.
314 if (compiler_count < 2) return false;
315
316 // Keep thread alive for at least some time.
317 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
318
319 // We only allow the last compiler thread of each type to get removed.
320 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1)
321 : CompileBroker::compiler2_object(compiler_count - 1);
322 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) {
323 if (do_it) {
324 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
325 compiler->set_num_compiler_threads(compiler_count - 1);
326 }
327 return true;
328 }
329 return false;
330 }
331
332 /**
333 * Add a CompileTask to a CompileQueue.
334 */
335 void CompileQueue::add(CompileTask* task) {
336 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
337
338 task->set_next(NULL);
339 task->set_prev(NULL);
340
341 if (_last == NULL) {
342 // The compile queue is empty.
343 assert(_first == NULL, "queue is empty");
344 _first = task;
345 _last = task;
346 } else {
347 // Append the task to the queue.
348 assert(_last->next() == NULL, "not last");
349 _last->set_next(task);
350 task->set_prev(_last);
351 _last = task;
352 }
353 ++_size;
354
355 // Mark the method as being in the compile queue.
356 task->method()->set_queued_for_compilation();
357
358 if (CIPrintCompileQueue) {
359 print_tty();
360 }
361
362 if (LogCompilation && xtty != NULL) {
363 task->log_task_queued();
364 }
365
366 // Notify CompilerThreads that a task is available.
367 MethodCompileQueue_lock->notify_all();
368 }
369
370 /**
371 * Empties compilation queue by putting all compilation tasks onto
372 * a freelist. Furthermore, the method wakes up all threads that are
373 * waiting on a compilation task to finish. This can happen if background
374 * compilation is disabled.
375 */
376 void CompileQueue::free_all() {
377 MutexLocker mu(MethodCompileQueue_lock);
378 CompileTask* next = _first;
379
380 // Iterate over all tasks in the compile queue
381 while (next != NULL) {
382 CompileTask* current = next;
383 next = current->next();
384 {
385 // Wake up thread that blocks on the compile task.
386 MutexLocker ct_lock(current->lock());
387 current->lock()->notify();
388 }
389 // Put the task back on the freelist.
390 CompileTask::free(current);
391 }
392 _first = NULL;
393
394 // Wake up all threads that block on the queue.
395 MethodCompileQueue_lock->notify_all();
396 }
397
398 /**
399 * Get the next CompileTask from a CompileQueue
400 */
401 CompileTask* CompileQueue::get() {
402 // save methods from RedefineClasses across safepoint
403 // across MethodCompileQueue_lock below.
404 methodHandle save_method;
405 methodHandle save_hot_method;
406
407 MutexLocker locker(MethodCompileQueue_lock);
408 // If _first is NULL we have no more compile jobs. There are two reasons for
409 // having no compile jobs: First, we compiled everything we wanted. Second,
410 // we ran out of code cache so compilation has been disabled. In the latter
411 // case we perform code cache sweeps to free memory such that we can re-enable
412 // compilation.
413 while (_first == NULL) {
414 // Exit loop if compilation is disabled forever
415 if (CompileBroker::is_compilation_disabled_forever()) {
416 return NULL;
417 }
418
419 // If there are no compilation tasks and we can compile new jobs
420 // (i.e., there is enough free space in the code cache) there is
421 // no need to invoke the sweeper. As a result, the hotness of methods
422 // remains unchanged. This behavior is desired, since we want to keep
423 // the stable state, i.e., we do not want to evict methods from the
424 // code cache if it is unnecessary.
425 // We need a timed wait here, since compiler threads can exit if compilation
426 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
427 // is not critical and we do not want idle compiler threads to wake up too often.
428 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
429
430 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
431 // Still nothing to compile. Give caller a chance to stop this thread.
432 if (can_remove(CompilerThread::current(), false)) return NULL;
433 }
434 }
435
436 if (CompileBroker::is_compilation_disabled_forever()) {
437 return NULL;
438 }
439
440 CompileTask* task;
441 {
442 NoSafepointVerifier nsv;
443 task = CompilationPolicy::policy()->select_task(this);
444 }
445
446 if (task != NULL) {
447 // Save method pointers across unlock safepoint. The task is removed from
448 // the compilation queue, which is walked during RedefineClasses.
449 save_method = methodHandle(task->method());
450 save_hot_method = methodHandle(task->hot_method());
451
452 remove(task);
453 purge_stale_tasks(); // may temporarily release MCQ lock
454 }
455
456 return task;
457 }
458
459 // Clean & deallocate stale compile tasks.
460 // Temporarily releases MethodCompileQueue lock.
461 void CompileQueue::purge_stale_tasks() {
462 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
463 if (_first_stale != NULL) {
464 // Stale tasks are purged when MCQ lock is released,
465 // but _first_stale updates are protected by MCQ lock.
466 // Once task processing starts and MCQ lock is released,
467 // other compiler threads can reuse _first_stale.
468 CompileTask* head = _first_stale;
469 _first_stale = NULL;
470 {
471 MutexUnlocker ul(MethodCompileQueue_lock);
472 for (CompileTask* task = head; task != NULL; ) {
473 CompileTask* next_task = task->next();
474 CompileTaskWrapper ctw(task); // Frees the task
475 task->set_failure_reason("stale task");
476 task = next_task;
477 }
478 }
479 }
480 }
481
482 void CompileQueue::remove(CompileTask* task) {
483 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
484 if (task->prev() != NULL) {
485 task->prev()->set_next(task->next());
486 } else {
487 // max is the first element
488 assert(task == _first, "Sanity");
489 _first = task->next();
490 }
491
492 if (task->next() != NULL) {
493 task->next()->set_prev(task->prev());
494 } else {
495 // max is the last element
496 assert(task == _last, "Sanity");
497 _last = task->prev();
498 }
499 --_size;
500 }
501
502 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
503 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
504 remove(task);
505
506 // Enqueue the task for reclamation (should be done outside MCQ lock)
507 task->set_next(_first_stale);
508 task->set_prev(NULL);
509 _first_stale = task;
510 }
511
512 // methods in the compile queue need to be marked as used on the stack
513 // so that they don't get reclaimed by Redefine Classes
514 void CompileQueue::mark_on_stack() {
515 CompileTask* task = _first;
516 while (task != NULL) {
517 task->mark_on_stack();
518 task = task->next();
519 }
520 }
521
522
523 CompileQueue* CompileBroker::compile_queue(int comp_level) {
524 if (is_c2_compile(comp_level)) return _c2_compile_queue;
525 if (is_c1_compile(comp_level)) return _c1_compile_queue;
526 return NULL;
527 }
528
529 void CompileBroker::print_compile_queues(outputStream* st) {
530 st->print_cr("Current compiles: ");
531 MutexLocker locker(MethodCompileQueue_lock);
532
533 char buf[2000];
534 int buflen = sizeof(buf);
535 Threads::print_threads_compiling(st, buf, buflen);
536
537 st->cr();
538 if (_c1_compile_queue != NULL) {
539 _c1_compile_queue->print(st);
540 }
541 if (_c2_compile_queue != NULL) {
542 _c2_compile_queue->print(st);
543 }
544 }
545
546 void CompileQueue::print(outputStream* st) {
547 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
548 st->print_cr("%s:", name());
549 CompileTask* task = _first;
550 if (task == NULL) {
551 st->print_cr("Empty");
552 } else {
553 while (task != NULL) {
554 task->print(st, NULL, true, true);
555 task = task->next();
556 }
557 }
558 st->cr();
559 }
560
561 void CompileQueue::print_tty() {
562 ttyLocker ttyl;
563 print(tty);
564 }
565
566 CompilerCounters::CompilerCounters() {
567 _current_method[0] = '\0';
568 _compile_type = CompileBroker::no_compile;
569 }
570
571 // ------------------------------------------------------------------
572 // CompileBroker::compilation_init
573 //
574 // Initialize the Compilation object
575 void CompileBroker::compilation_init_phase1(TRAPS) {
576 _last_method_compiled[0] = '\0';
577
578 // No need to initialize compilation system if we do not use it.
579 if (!UseCompiler) {
580 return;
581 }
582 // Set the interface to the current compiler(s).
583 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
584 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
585
586 #if INCLUDE_JVMCI
587 if (EnableJVMCI) {
588 // This is creating a JVMCICompiler singleton.
589 JVMCICompiler* jvmci = new JVMCICompiler();
590
591 if (UseJVMCICompiler) {
592 _compilers[1] = jvmci;
593 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
594 if (BootstrapJVMCI) {
595 // JVMCI will bootstrap so give it more threads
596 _c2_count = MIN2(32, os::active_processor_count());
597 }
598 } else {
599 _c2_count = JVMCIThreads;
600 }
601 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
602 } else {
603 _c1_count = JVMCIHostThreads;
604 }
605 }
606 }
607 #endif // INCLUDE_JVMCI
608
609 #ifdef COMPILER1
610 if (_c1_count > 0) {
611 _compilers[0] = new Compiler();
612 }
613 #endif // COMPILER1
614
615 #ifdef COMPILER2
616 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
617 if (_c2_count > 0) {
618 _compilers[1] = new C2Compiler();
619 }
620 }
621 #endif // COMPILER2
622
623 // Start the compiler thread(s) and the sweeper thread
624 init_compiler_sweeper_threads();
625 // totalTime performance counter is always created as it is required
626 // by the implementation of java.lang.management.CompilationMBean.
627 {
628 EXCEPTION_MARK;
629 _perf_total_compilation =
630 PerfDataManager::create_counter(JAVA_CI, "totalTime",
631 PerfData::U_Ticks, CHECK);
632 }
633
634 if (UsePerfData) {
635
636 EXCEPTION_MARK;
637
638 // create the jvmstat performance counters
639 _perf_osr_compilation =
640 PerfDataManager::create_counter(SUN_CI, "osrTime",
641 PerfData::U_Ticks, CHECK);
642
643 _perf_standard_compilation =
644 PerfDataManager::create_counter(SUN_CI, "standardTime",
645 PerfData::U_Ticks, CHECK);
646
647 _perf_total_bailout_count =
648 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
649 PerfData::U_Events, CHECK);
650
651 _perf_total_invalidated_count =
652 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
653 PerfData::U_Events, CHECK);
654
655 _perf_total_compile_count =
656 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
657 PerfData::U_Events, CHECK);
658 _perf_total_osr_compile_count =
659 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
660 PerfData::U_Events, CHECK);
661
662 _perf_total_standard_compile_count =
663 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
664 PerfData::U_Events, CHECK);
665
666 _perf_sum_osr_bytes_compiled =
667 PerfDataManager::create_counter(SUN_CI, "osrBytes",
668 PerfData::U_Bytes, CHECK);
669
670 _perf_sum_standard_bytes_compiled =
671 PerfDataManager::create_counter(SUN_CI, "standardBytes",
672 PerfData::U_Bytes, CHECK);
673
674 _perf_sum_nmethod_size =
675 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
676 PerfData::U_Bytes, CHECK);
677
678 _perf_sum_nmethod_code_size =
679 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
680 PerfData::U_Bytes, CHECK);
681
682 _perf_last_method =
683 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
684 CompilerCounters::cmname_buffer_length,
685 "", CHECK);
686
687 _perf_last_failed_method =
688 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
689 CompilerCounters::cmname_buffer_length,
690 "", CHECK);
691
692 _perf_last_invalidated_method =
693 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
694 CompilerCounters::cmname_buffer_length,
695 "", CHECK);
696
697 _perf_last_compile_type =
698 PerfDataManager::create_variable(SUN_CI, "lastType",
699 PerfData::U_None,
700 (jlong)CompileBroker::no_compile,
701 CHECK);
702
703 _perf_last_compile_size =
704 PerfDataManager::create_variable(SUN_CI, "lastSize",
705 PerfData::U_Bytes,
706 (jlong)CompileBroker::no_compile,
707 CHECK);
708
709
710 _perf_last_failed_type =
711 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
712 PerfData::U_None,
713 (jlong)CompileBroker::no_compile,
714 CHECK);
715
716 _perf_last_invalidated_type =
717 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
718 PerfData::U_None,
719 (jlong)CompileBroker::no_compile,
720 CHECK);
721 }
722 }
723
724 // Completes compiler initialization. Compilation requests submitted
725 // prior to this will be silently ignored.
726 void CompileBroker::compilation_init_phase2() {
727 _initialized = true;
728 }
729
730 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
731 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
732 Handle thread_group(THREAD, Universe::system_thread_group());
733 return JavaCalls::construct_new_instance(
734 SystemDictionary::Thread_klass(),
735 vmSymbols::threadgroup_string_void_signature(),
736 thread_group,
737 string,
738 CHECK_NH);
739 }
740
741
742 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue,
743 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
744 JavaThread* thread = NULL;
745 {
746 MutexLocker mu(Threads_lock, THREAD);
747 if (compiler_thread) {
748 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
749 CompilerCounters* counters = new CompilerCounters();
750 thread = new CompilerThread(queue, counters);
751 }
752 } else {
753 thread = new CodeCacheSweeperThread();
754 }
755 // At this point the new CompilerThread data-races with this startup
756 // thread (which I believe is the primoridal thread and NOT the VM
757 // thread). This means Java bytecodes being executed at startup can
758 // queue compile jobs which will run at whatever default priority the
759 // newly created CompilerThread runs at.
760
761
762 // At this point it may be possible that no osthread was created for the
763 // JavaThread due to lack of memory. We would have to throw an exception
764 // in that case. However, since this must work and we do not allow
765 // exceptions anyway, check and abort if this fails. But first release the
766 // lock.
767
768 if (thread != NULL && thread->osthread() != NULL) {
769
770 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
771
772 // Note that this only sets the JavaThread _priority field, which by
773 // definition is limited to Java priorities and not OS priorities.
774 // The os-priority is set in the CompilerThread startup code itself
775
776 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
777
778 // Note that we cannot call os::set_priority because it expects Java
779 // priorities and we are *explicitly* using OS priorities so that it's
780 // possible to set the compiler thread priority higher than any Java
781 // thread.
782
783 int native_prio = CompilerThreadPriority;
784 if (native_prio == -1) {
785 if (UseCriticalCompilerThreadPriority) {
786 native_prio = os::java_to_os_priority[CriticalPriority];
787 } else {
788 native_prio = os::java_to_os_priority[NearMaxPriority];
789 }
790 }
791 os::set_native_priority(thread, native_prio);
792
793 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
794
795 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
796 if (compiler_thread) {
797 thread->as_CompilerThread()->set_compiler(comp);
798 }
799 Threads::add(thread);
800 Thread::start(thread);
801 }
802 }
803
804 // First release lock before aborting VM.
805 if (thread == NULL || thread->osthread() == NULL) {
806 if (UseDynamicNumberOfCompilerThreads && comp->num_compiler_threads() > 0) {
807 if (thread != NULL) {
808 thread->smr_delete();
809 }
810 return NULL;
811 }
812 vm_exit_during_initialization("java.lang.OutOfMemoryError",
813 os::native_thread_creation_failed_msg());
814 }
815
816 // Let go of Threads_lock before yielding
817 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
818
819 return thread;
820 }
821
822
823 void CompileBroker::init_compiler_sweeper_threads() {
824 EXCEPTION_MARK;
825 #if !defined(ZERO)
826 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
827 #endif // !ZERO
828 // Initialize the compilation queue
829 if (_c2_count > 0) {
830 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
831 _c2_compile_queue = new CompileQueue(name);
832 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
833 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
834 }
835 if (_c1_count > 0) {
836 _c1_compile_queue = new CompileQueue("C1 compile queue");
837 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
838 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
839 }
840
841 char name_buffer[256];
842
843 for (int i = 0; i < _c2_count; i++) {
844 // Create a name for our thread.
845 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
846 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD));
847 _compiler2_objects[i] = thread_handle;
848 _compiler2_logs[i] = NULL;
849
850 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
851 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], /* compiler_thread */ true, CHECK);
852 assert(ct != NULL, "should have been handled for initial thread");
853 _compilers[1]->set_num_compiler_threads(i + 1);
854 if (TraceCompilerThreads) {
855 ResourceMark rm;
856 MutexLocker mu(Threads_lock);
857 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
858 }
859 }
860 }
861
862 for (int i = 0; i < _c1_count; i++) {
863 // Create a name for our thread.
864 sprintf(name_buffer, "C1 CompilerThread%d", i);
865 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD));
866 _compiler1_objects[i] = thread_handle;
867 _compiler1_logs[i] = NULL;
868
869 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
870 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], /* compiler_thread */ true, CHECK);
871 assert(ct != NULL, "should have been handled for initial thread");
872 _compilers[0]->set_num_compiler_threads(i + 1);
873 if (TraceCompilerThreads) {
874 ResourceMark rm;
875 MutexLocker mu(Threads_lock);
876 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
877 }
878 }
879 }
880
881 if (UsePerfData) {
882 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
883 }
884
885 if (MethodFlushing) {
886 // Initialize the sweeper thread
887 jobject thread_handle = JNIHandles::make_local(THREAD, create_thread_oop("Sweeper thread", THREAD)());
888 make_thread(thread_handle, NULL, NULL, /* compiler_thread */ false, CHECK);
889 }
890 }
891
892 void CompileBroker::possibly_add_compiler_threads() {
893 EXCEPTION_MARK;
894
895 julong available_memory = os::available_memory();
896 // Only do attempt to start additional threads if the lock is free.
897 if (!CompileThread_lock->try_lock()) return;
898
899 if (_c2_compile_queue != NULL) {
900 int old_c2_count = _compilers[1]->num_compiler_threads();
901 int new_c2_count = MIN3(_c2_count,
902 _c2_compile_queue->size() / 2,
903 (int)(available_memory / 200*M));
904
905 for (int i = old_c2_count; i < new_c2_count; i++) {
906 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], true, CHECK);
907 if (ct == NULL) break;
908 _compilers[1]->set_num_compiler_threads(i + 1);
909 if (TraceCompilerThreads) {
910 ResourceMark rm;
911 MutexLocker mu(Threads_lock);
912 tty->print_cr("Added compiler thread %s (available memory: %dMB)",
913 ct->get_thread_name(), (int)(available_memory/M));
914 }
915 }
916 }
917
918 if (_c1_compile_queue != NULL) {
919 int old_c1_count = _compilers[0]->num_compiler_threads();
920 int new_c1_count = MIN3(_c1_count,
921 _c1_compile_queue->size() / 4,
922 (int)(available_memory / 100*M));
923
924 for (int i = old_c1_count; i < new_c1_count; i++) {
925 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], true, CHECK);
926 if (ct == NULL) break;
927 _compilers[0]->set_num_compiler_threads(i + 1);
928 if (TraceCompilerThreads) {
929 ResourceMark rm;
930 MutexLocker mu(Threads_lock);
931 tty->print_cr("Added compiler thread %s (available memory: %dMB)",
932 ct->get_thread_name(), (int)(available_memory/M));
933 }
934 }
935 }
936
937 CompileThread_lock->unlock();
938 }
939
940
941 /**
942 * Set the methods on the stack as on_stack so that redefine classes doesn't
943 * reclaim them. This method is executed at a safepoint.
944 */
945 void CompileBroker::mark_on_stack() {
946 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
947 // Since we are at a safepoint, we do not need a lock to access
948 // the compile queues.
949 if (_c2_compile_queue != NULL) {
950 _c2_compile_queue->mark_on_stack();
951 }
952 if (_c1_compile_queue != NULL) {
953 _c1_compile_queue->mark_on_stack();
954 }
955 }
956
957 // ------------------------------------------------------------------
958 // CompileBroker::compile_method
959 //
960 // Request compilation of a method.
961 void CompileBroker::compile_method_base(const methodHandle& method,
962 int osr_bci,
963 int comp_level,
964 const methodHandle& hot_method,
965 int hot_count,
966 CompileTask::CompileReason compile_reason,
967 bool blocking,
968 Thread* thread) {
969 guarantee(!method->is_abstract(), "cannot compile abstract methods");
970 assert(method->method_holder()->is_instance_klass(),
971 "sanity check");
972 assert(!method->method_holder()->is_not_initialized(),
973 "method holder must be initialized");
974 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
975
976 if (CIPrintRequests) {
977 tty->print("request: ");
978 method->print_short_name(tty);
979 if (osr_bci != InvocationEntryBci) {
980 tty->print(" osr_bci: %d", osr_bci);
981 }
982 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
983 if (!hot_method.is_null()) {
984 tty->print(" hot: ");
985 if (hot_method() != method()) {
986 hot_method->print_short_name(tty);
987 } else {
988 tty->print("yes");
989 }
990 }
991 tty->cr();
992 }
993
994 // A request has been made for compilation. Before we do any
995 // real work, check to see if the method has been compiled
996 // in the meantime with a definitive result.
997 if (compilation_is_complete(method, osr_bci, comp_level)) {
998 return;
999 }
1000
1001 #ifndef PRODUCT
1002 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1003 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1004 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1005 return;
1006 }
1007 }
1008 #endif
1009
1010 // If this method is already in the compile queue, then
1011 // we do not block the current thread.
1012 if (compilation_is_in_queue(method)) {
1013 // We may want to decay our counter a bit here to prevent
1014 // multiple denied requests for compilation. This is an
1015 // open compilation policy issue. Note: The other possibility,
1016 // in the case that this is a blocking compile request, is to have
1017 // all subsequent blocking requesters wait for completion of
1018 // ongoing compiles. Note that in this case we'll need a protocol
1019 // for freeing the associated compile tasks. [Or we could have
1020 // a single static monitor on which all these waiters sleep.]
1021 return;
1022 }
1023
1024 if (TieredCompilation) {
1025 // Tiered policy requires MethodCounters to exist before adding a method to
1026 // the queue. Create if we don't have them yet.
1027 method->get_method_counters(thread);
1028 }
1029
1030 // Outputs from the following MutexLocker block:
1031 CompileTask* task = NULL;
1032 CompileQueue* queue = compile_queue(comp_level);
1033
1034 // Acquire our lock.
1035 {
1036 MutexLocker locker(MethodCompileQueue_lock, thread);
1037
1038 // Make sure the method has not slipped into the queues since
1039 // last we checked; note that those checks were "fast bail-outs".
1040 // Here we need to be more careful, see 14012000 below.
1041 if (compilation_is_in_queue(method)) {
1042 return;
1043 }
1044
1045 // We need to check again to see if the compilation has
1046 // completed. A previous compilation may have registered
1047 // some result.
1048 if (compilation_is_complete(method, osr_bci, comp_level)) {
1049 return;
1050 }
1051
1052 // We now know that this compilation is not pending, complete,
1053 // or prohibited. Assign a compile_id to this compilation
1054 // and check to see if it is in our [Start..Stop) range.
1055 int compile_id = assign_compile_id(method, osr_bci);
1056 if (compile_id == 0) {
1057 // The compilation falls outside the allowed range.
1058 return;
1059 }
1060
1061 #if INCLUDE_JVMCI
1062 if (UseJVMCICompiler) {
1063 if (blocking) {
1064 // Don't allow blocking compiles for requests triggered by JVMCI.
1065 if (thread->is_Compiler_thread()) {
1066 blocking = false;
1067 }
1068
1069 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1070 vframeStream vfst((JavaThread*) thread);
1071 for (; !vfst.at_end(); vfst.next()) {
1072 if (vfst.method()->is_static_initializer() ||
1073 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1074 vfst.method()->name() == vmSymbols::loadClass_name())) {
1075 blocking = false;
1076 break;
1077 }
1078 }
1079
1080 // Don't allow blocking compilation requests to JVMCI
1081 // if JVMCI itself is not yet initialized
1082 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
1083 blocking = false;
1084 }
1085
1086 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1087 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1088 // such as the DestroyJavaVM thread.
1089 if (JVMCIRuntime::shutdown_called()) {
1090 blocking = false;
1091 }
1092 }
1093 }
1094 #endif // INCLUDE_JVMCI
1095
1096 // We will enter the compilation in the queue.
1097 // 14012000: Note that this sets the queued_for_compile bits in
1098 // the target method. We can now reason that a method cannot be
1099 // queued for compilation more than once, as follows:
1100 // Before a thread queues a task for compilation, it first acquires
1101 // the compile queue lock, then checks if the method's queued bits
1102 // are set or it has already been compiled. Thus there can not be two
1103 // instances of a compilation task for the same method on the
1104 // compilation queue. Consider now the case where the compilation
1105 // thread has already removed a task for that method from the queue
1106 // and is in the midst of compiling it. In this case, the
1107 // queued_for_compile bits must be set in the method (and these
1108 // will be visible to the current thread, since the bits were set
1109 // under protection of the compile queue lock, which we hold now.
1110 // When the compilation completes, the compiler thread first sets
1111 // the compilation result and then clears the queued_for_compile
1112 // bits. Neither of these actions are protected by a barrier (or done
1113 // under the protection of a lock), so the only guarantee we have
1114 // (on machines with TSO (Total Store Order)) is that these values
1115 // will update in that order. As a result, the only combinations of
1116 // these bits that the current thread will see are, in temporal order:
1117 // <RESULT, QUEUE> :
1118 // <0, 1> : in compile queue, but not yet compiled
1119 // <1, 1> : compiled but queue bit not cleared
1120 // <1, 0> : compiled and queue bit cleared
1121 // Because we first check the queue bits then check the result bits,
1122 // we are assured that we cannot introduce a duplicate task.
1123 // Note that if we did the tests in the reverse order (i.e. check
1124 // result then check queued bit), we could get the result bit before
1125 // the compilation completed, and the queue bit after the compilation
1126 // completed, and end up introducing a "duplicate" (redundant) task.
1127 // In that case, the compiler thread should first check if a method
1128 // has already been compiled before trying to compile it.
1129 // NOTE: in the event that there are multiple compiler threads and
1130 // there is de-optimization/recompilation, things will get hairy,
1131 // and in that case it's best to protect both the testing (here) of
1132 // these bits, and their updating (here and elsewhere) under a
1133 // common lock.
1134 task = create_compile_task(queue,
1135 compile_id, method,
1136 osr_bci, comp_level,
1137 hot_method, hot_count, compile_reason,
1138 blocking);
1139 }
1140
1141 if (blocking) {
1142 wait_for_completion(task);
1143 }
1144 }
1145
1146 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1147 int comp_level,
1148 const methodHandle& hot_method, int hot_count,
1149 CompileTask::CompileReason compile_reason,
1150 Thread* THREAD) {
1151 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1152 if (!_initialized || comp_level == CompLevel_none) {
1153 return NULL;
1154 }
1155
1156 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1157 assert(comp != NULL, "Ensure we have a compiler");
1158
1159 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1160 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1161 DirectivesStack::release(directive);
1162 return nm;
1163 }
1164
1165 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1166 int comp_level,
1167 const methodHandle& hot_method, int hot_count,
1168 CompileTask::CompileReason compile_reason,
1169 DirectiveSet* directive,
1170 Thread* THREAD) {
1171
1172 // make sure arguments make sense
1173 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1174 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1175 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1176 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1177 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1178 // allow any levels for WhiteBox
1179 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1180 // return quickly if possible
1181
1182 // lock, make sure that the compilation
1183 // isn't prohibited in a straightforward way.
1184 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1185 if (comp == NULL || !comp->can_compile_method(method) ||
1186 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1187 return NULL;
1188 }
1189
1190 #if INCLUDE_JVMCI
1191 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1192 return NULL;
1193 }
1194 #endif
1195
1196 if (osr_bci == InvocationEntryBci) {
1197 // standard compilation
1198 CompiledMethod* method_code = method->code();
1199 if (method_code != NULL && method_code->is_nmethod()) {
1200 if (compilation_is_complete(method, osr_bci, comp_level)) {
1201 return (nmethod*) method_code;
1202 }
1203 }
1204 if (method->is_not_compilable(comp_level)) {
1205 return NULL;
1206 }
1207 } else {
1208 // osr compilation
1209 #ifndef TIERED
1210 // seems like an assert of dubious value
1211 assert(comp_level == CompLevel_highest_tier,
1212 "all OSR compiles are assumed to be at a single compilation level");
1213 #endif // TIERED
1214 // We accept a higher level osr method
1215 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1216 if (nm != NULL) return nm;
1217 if (method->is_not_osr_compilable(comp_level)) return NULL;
1218 }
1219
1220 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1221 // some prerequisites that are compiler specific
1222 if (comp->is_c2()) {
1223 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1224 // Resolve all classes seen in the signature of the method
1225 // we are compiling.
1226 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1227 }
1228
1229 // If the method is native, do the lookup in the thread requesting
1230 // the compilation. Native lookups can load code, which is not
1231 // permitted during compilation.
1232 //
1233 // Note: A native method implies non-osr compilation which is
1234 // checked with an assertion at the entry of this method.
1235 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1236 bool in_base_library;
1237 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1238 if (HAS_PENDING_EXCEPTION) {
1239 // In case of an exception looking up the method, we just forget
1240 // about it. The interpreter will kick-in and throw the exception.
1241 method->set_not_compilable(); // implies is_not_osr_compilable()
1242 CLEAR_PENDING_EXCEPTION;
1243 return NULL;
1244 }
1245 assert(method->has_native_function(), "must have native code by now");
1246 }
1247
1248 // RedefineClasses() has replaced this method; just return
1249 if (method->is_old()) {
1250 return NULL;
1251 }
1252
1253 // JVMTI -- post_compile_event requires jmethod_id() that may require
1254 // a lock the compiling thread can not acquire. Prefetch it here.
1255 if (JvmtiExport::should_post_compiled_method_load()) {
1256 method->jmethod_id();
1257 }
1258
1259 // do the compilation
1260 if (method->is_native()) {
1261 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1262 // The following native methods:
1263 //
1264 // java.lang.Float.intBitsToFloat
1265 // java.lang.Float.floatToRawIntBits
1266 // java.lang.Double.longBitsToDouble
1267 // java.lang.Double.doubleToRawLongBits
1268 //
1269 // are called through the interpreter even if interpreter native stubs
1270 // are not preferred (i.e., calling through adapter handlers is preferred).
1271 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1272 // if the version of the methods from the native libraries is called.
1273 // As the interpreter and the C2-intrinsified version of the methods preserves
1274 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1275 if ((UseSSE >= 1 &&
1276 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1277 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1278 (UseSSE >= 2 &&
1279 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1280 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1281 return NULL;
1282 }
1283
1284 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1285 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1286 //
1287 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1288 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1289 AdapterHandlerLibrary::create_native_wrapper(method);
1290 } else {
1291 return NULL;
1292 }
1293 } else {
1294 // If the compiler is shut off due to code cache getting full
1295 // fail out now so blocking compiles dont hang the java thread
1296 if (!should_compile_new_jobs()) {
1297 CompilationPolicy::policy()->delay_compilation(method());
1298 return NULL;
1299 }
1300 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1301 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1302 }
1303
1304 // return requested nmethod
1305 // We accept a higher level osr method
1306 if (osr_bci == InvocationEntryBci) {
1307 CompiledMethod* code = method->code();
1308 if (code == NULL) {
1309 return (nmethod*) code;
1310 } else {
1311 return code->as_nmethod_or_null();
1312 }
1313 }
1314 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1315 }
1316
1317
1318 // ------------------------------------------------------------------
1319 // CompileBroker::compilation_is_complete
1320 //
1321 // See if compilation of this method is already complete.
1322 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1323 int osr_bci,
1324 int comp_level) {
1325 bool is_osr = (osr_bci != standard_entry_bci);
1326 if (is_osr) {
1327 if (method->is_not_osr_compilable(comp_level)) {
1328 return true;
1329 } else {
1330 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1331 return (result != NULL);
1332 }
1333 } else {
1334 if (method->is_not_compilable(comp_level)) {
1335 return true;
1336 } else {
1337 CompiledMethod* result = method->code();
1338 if (result == NULL) return false;
1339 return comp_level == result->comp_level();
1340 }
1341 }
1342 }
1343
1344
1345 /**
1346 * See if this compilation is already requested.
1347 *
1348 * Implementation note: there is only a single "is in queue" bit
1349 * for each method. This means that the check below is overly
1350 * conservative in the sense that an osr compilation in the queue
1351 * will block a normal compilation from entering the queue (and vice
1352 * versa). This can be remedied by a full queue search to disambiguate
1353 * cases. If it is deemed profitable, this may be done.
1354 */
1355 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1356 return method->queued_for_compilation();
1357 }
1358
1359 // ------------------------------------------------------------------
1360 // CompileBroker::compilation_is_prohibited
1361 //
1362 // See if this compilation is not allowed.
1363 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1364 bool is_native = method->is_native();
1365 // Some compilers may not support the compilation of natives.
1366 AbstractCompiler *comp = compiler(comp_level);
1367 if (is_native &&
1368 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1369 method->set_not_compilable_quietly(comp_level);
1370 return true;
1371 }
1372
1373 bool is_osr = (osr_bci != standard_entry_bci);
1374 // Some compilers may not support on stack replacement.
1375 if (is_osr &&
1376 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1377 method->set_not_osr_compilable(comp_level);
1378 return true;
1379 }
1380
1381 // The method may be explicitly excluded by the user.
1382 double scale;
1383 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1384 bool quietly = CompilerOracle::should_exclude_quietly();
1385 if (PrintCompilation && !quietly) {
1386 // This does not happen quietly...
1387 ResourceMark rm;
1388 tty->print("### Excluding %s:%s",
1389 method->is_native() ? "generation of native wrapper" : "compile",
1390 (method->is_static() ? " static" : ""));
1391 method->print_short_name(tty);
1392 tty->cr();
1393 }
1394 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1395 }
1396
1397 return false;
1398 }
1399
1400 /**
1401 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1402 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1403 * The function also allows to generate separate compilation IDs for OSR compilations.
1404 */
1405 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1406 #ifdef ASSERT
1407 bool is_osr = (osr_bci != standard_entry_bci);
1408 int id;
1409 if (method->is_native()) {
1410 assert(!is_osr, "can't be osr");
1411 // Adapters, native wrappers and method handle intrinsics
1412 // should be generated always.
1413 return Atomic::add(1, &_compilation_id);
1414 } else if (CICountOSR && is_osr) {
1415 id = Atomic::add(1, &_osr_compilation_id);
1416 if (CIStartOSR <= id && id < CIStopOSR) {
1417 return id;
1418 }
1419 } else {
1420 id = Atomic::add(1, &_compilation_id);
1421 if (CIStart <= id && id < CIStop) {
1422 return id;
1423 }
1424 }
1425
1426 // Method was not in the appropriate compilation range.
1427 method->set_not_compilable_quietly();
1428 return 0;
1429 #else
1430 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1431 // only _compilation_id is incremented.
1432 return Atomic::add(1, &_compilation_id);
1433 #endif
1434 }
1435
1436 // ------------------------------------------------------------------
1437 // CompileBroker::assign_compile_id_unlocked
1438 //
1439 // Public wrapper for assign_compile_id that acquires the needed locks
1440 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1441 MutexLocker locker(MethodCompileQueue_lock, thread);
1442 return assign_compile_id(method, osr_bci);
1443 }
1444
1445 // ------------------------------------------------------------------
1446 // CompileBroker::preload_classes
1447 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1448 // Move this code over from c1_Compiler.cpp
1449 ShouldNotReachHere();
1450 }
1451
1452
1453 // ------------------------------------------------------------------
1454 // CompileBroker::create_compile_task
1455 //
1456 // Create a CompileTask object representing the current request for
1457 // compilation. Add this task to the queue.
1458 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1459 int compile_id,
1460 const methodHandle& method,
1461 int osr_bci,
1462 int comp_level,
1463 const methodHandle& hot_method,
1464 int hot_count,
1465 CompileTask::CompileReason compile_reason,
1466 bool blocking) {
1467 CompileTask* new_task = CompileTask::allocate();
1468 new_task->initialize(compile_id, method, osr_bci, comp_level,
1469 hot_method, hot_count, compile_reason,
1470 blocking);
1471 queue->add(new_task);
1472 return new_task;
1473 }
1474
1475 #if INCLUDE_JVMCI
1476 // The number of milliseconds to wait before checking if
1477 // JVMCI compilation has made progress.
1478 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1479
1480 // The number of JVMCI compilation progress checks that must fail
1481 // before unblocking a thread waiting for a blocking compilation.
1482 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1483
1484 /**
1485 * Waits for a JVMCI compiler to complete a given task. This thread
1486 * waits until either the task completes or it sees no JVMCI compilation
1487 * progress for N consecutive milliseconds where N is
1488 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1489 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1490 *
1491 * @return true if this thread needs to free/recycle the task
1492 */
1493 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1494 MutexLocker waiter(task->lock(), thread);
1495 int progress_wait_attempts = 0;
1496 int methods_compiled = jvmci->methods_compiled();
1497 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1498 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1499 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1500
1501 bool progress;
1502 if (jvmci_compiler_thread != NULL) {
1503 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1504 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1505 } else {
1506 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1507 // that all JVMCI compiler threads are blocked on. We use the counter for
1508 // successful JVMCI compilations to determine whether JVMCI compilation
1509 // is still making progress through the JVMCI compiler queue.
1510 progress = jvmci->methods_compiled() != methods_compiled;
1511 }
1512
1513 if (!progress) {
1514 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1515 if (PrintCompilation) {
1516 task->print(tty, "wait for blocking compilation timed out");
1517 }
1518 break;
1519 }
1520 } else {
1521 progress_wait_attempts = 0;
1522 if (jvmci_compiler_thread == NULL) {
1523 methods_compiled = jvmci->methods_compiled();
1524 }
1525 }
1526 }
1527 task->clear_waiter();
1528 return task->is_complete();
1529 }
1530 #endif
1531
1532 /**
1533 * Wait for the compilation task to complete.
1534 */
1535 void CompileBroker::wait_for_completion(CompileTask* task) {
1536 if (CIPrintCompileQueue) {
1537 ttyLocker ttyl;
1538 tty->print_cr("BLOCKING FOR COMPILE");
1539 }
1540
1541 assert(task->is_blocking(), "can only wait on blocking task");
1542
1543 JavaThread* thread = JavaThread::current();
1544 thread->set_blocked_on_compilation(true);
1545
1546 methodHandle method(thread, task->method());
1547 bool free_task;
1548 #if INCLUDE_JVMCI
1549 AbstractCompiler* comp = compiler(task->comp_level());
1550 if (comp->is_jvmci()) {
1551 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1552 } else
1553 #endif
1554 {
1555 MutexLocker waiter(task->lock(), thread);
1556 free_task = true;
1557 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1558 task->lock()->wait();
1559 }
1560 }
1561
1562 thread->set_blocked_on_compilation(false);
1563 if (free_task) {
1564 if (is_compilation_disabled_forever()) {
1565 CompileTask::free(task);
1566 return;
1567 }
1568
1569 // It is harmless to check this status without the lock, because
1570 // completion is a stable property (until the task object is recycled).
1571 assert(task->is_complete(), "Compilation should have completed");
1572 assert(task->code_handle() == NULL, "must be reset");
1573
1574 // By convention, the waiter is responsible for recycling a
1575 // blocking CompileTask. Since there is only one waiter ever
1576 // waiting on a CompileTask, we know that no one else will
1577 // be using this CompileTask; we can free it.
1578 CompileTask::free(task);
1579 }
1580 }
1581
1582 /**
1583 * Initialize compiler thread(s) + compiler object(s). The postcondition
1584 * of this function is that the compiler runtimes are initialized and that
1585 * compiler threads can start compiling.
1586 */
1587 bool CompileBroker::init_compiler_runtime() {
1588 CompilerThread* thread = CompilerThread::current();
1589 AbstractCompiler* comp = thread->compiler();
1590 // Final sanity check - the compiler object must exist
1591 guarantee(comp != NULL, "Compiler object must exist");
1592
1593 int system_dictionary_modification_counter;
1594 {
1595 MutexLocker locker(Compile_lock, thread);
1596 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1597 }
1598
1599 {
1600 // Must switch to native to allocate ci_env
1601 ThreadToNativeFromVM ttn(thread);
1602 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1603 // Cache Jvmti state
1604 ci_env.cache_jvmti_state();
1605 // Cache DTrace flags
1606 ci_env.cache_dtrace_flags();
1607
1608 // Switch back to VM state to do compiler initialization
1609 ThreadInVMfromNative tv(thread);
1610 ResetNoHandleMark rnhm;
1611
1612 // Perform per-thread and global initializations
1613 comp->initialize();
1614 }
1615
1616 if (comp->is_failed()) {
1617 disable_compilation_forever();
1618 // If compiler initialization failed, no compiler thread that is specific to a
1619 // particular compiler runtime will ever start to compile methods.
1620 shutdown_compiler_runtime(comp, thread);
1621 return false;
1622 }
1623
1624 // C1 specific check
1625 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1626 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1627 return false;
1628 }
1629
1630 return true;
1631 }
1632
1633 /**
1634 * If C1 and/or C2 initialization failed, we shut down all compilation.
1635 * We do this to keep things simple. This can be changed if it ever turns
1636 * out to be a problem.
1637 */
1638 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1639 // Free buffer blob, if allocated
1640 if (thread->get_buffer_blob() != NULL) {
1641 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1642 CodeCache::free(thread->get_buffer_blob());
1643 }
1644
1645 if (comp->should_perform_shutdown()) {
1646 // There are two reasons for shutting down the compiler
1647 // 1) compiler runtime initialization failed
1648 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1649 warning("%s initialization failed. Shutting down all compilers", comp->name());
1650
1651 // Only one thread per compiler runtime object enters here
1652 // Set state to shut down
1653 comp->set_shut_down();
1654
1655 // Delete all queued compilation tasks to make compiler threads exit faster.
1656 if (_c1_compile_queue != NULL) {
1657 _c1_compile_queue->free_all();
1658 }
1659
1660 if (_c2_compile_queue != NULL) {
1661 _c2_compile_queue->free_all();
1662 }
1663
1664 // Set flags so that we continue execution with using interpreter only.
1665 UseCompiler = false;
1666 UseInterpreter = true;
1667
1668 // We could delete compiler runtimes also. However, there are references to
1669 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1670 // fail. This can be done later if necessary.
1671 }
1672 }
1673
1674 /**
1675 * Helper function to create new or reuse old CompileLog.
1676 */
1677 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1678 if (!LogCompilation) return NULL;
1679
1680 AbstractCompiler *compiler = ct->compiler();
1681 bool c1 = compiler->is_c1();
1682 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1683 assert(compiler_objects != NULL, "must be initialized at this point");
1684 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1685 assert(logs != NULL, "must be initialized at this point");
1686 int count = c1 ? _c1_count : _c2_count;
1687
1688 // Find Compiler number by its threadObj.
1689 oop compiler_obj = ct->threadObj();
1690 int compiler_number = 0;
1691 bool found = false;
1692 for (; compiler_number < count; compiler_number++) {
1693 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) {
1694 found = true;
1695 break;
1696 }
1697 }
1698 assert(found, "Compiler must exist at this point");
1699
1700 // Determine pointer for this thread's log.
1701 CompileLog** log_ptr = &logs[compiler_number];
1702
1703 // Return old one if it exists.
1704 CompileLog* log = *log_ptr;
1705 if (log != NULL) {
1706 ct->init_log(log);
1707 return log;
1708 }
1709
1710 // Create a new one and remember it.
1711 init_compiler_thread_log();
1712 log = ct->log();
1713 *log_ptr = log;
1714 return log;
1715 }
1716
1717 // ------------------------------------------------------------------
1718 // CompileBroker::compiler_thread_loop
1719 //
1720 // The main loop run by a CompilerThread.
1721 void CompileBroker::compiler_thread_loop() {
1722 CompilerThread* thread = CompilerThread::current();
1723 CompileQueue* queue = thread->queue();
1724 // For the thread that initializes the ciObjectFactory
1725 // this resource mark holds all the shared objects
1726 ResourceMark rm;
1727
1728 // First thread to get here will initialize the compiler interface
1729
1730 {
1731 ASSERT_IN_VM;
1732 MutexLocker only_one (CompileThread_lock, thread);
1733 if (!ciObjectFactory::is_initialized()) {
1734 ciObjectFactory::initialize();
1735 }
1736 }
1737
1738 // Open a log.
1739 CompileLog* log = get_log(thread);
1740 if (log != NULL) {
1741 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1742 thread->name(),
1743 os::current_thread_id(),
1744 os::current_process_id());
1745 log->stamp();
1746 log->end_elem();
1747 }
1748
1749 // If compiler thread/runtime initialization fails, exit the compiler thread
1750 if (!init_compiler_runtime()) {
1751 return;
1752 }
1753
1754 thread->start_idle_timer();
1755
1756 // Poll for new compilation tasks as long as the JVM runs. Compilation
1757 // should only be disabled if something went wrong while initializing the
1758 // compiler runtimes. This, in turn, should not happen. The only known case
1759 // when compiler runtime initialization fails is if there is not enough free
1760 // space in the code cache to generate the necessary stubs, etc.
1761 while (!is_compilation_disabled_forever()) {
1762 // We need this HandleMark to avoid leaking VM handles.
1763 HandleMark hm(thread);
1764
1765 CompileTask* task = queue->get();
1766 if (task == NULL) {
1767 if (UseDynamicNumberOfCompilerThreads) {
1768 // Access compiler_count under lock to enforce consistency.
1769 MutexLocker only_one(CompileThread_lock);
1770 if (can_remove(thread, true)) {
1771 if (TraceCompilerThreads) {
1772 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1773 thread->name(), thread->idle_time_millis());
1774 }
1775 return; // Stop this thread.
1776 }
1777 }
1778 continue;
1779 }
1780
1781 if (UseDynamicNumberOfCompilerThreads) {
1782 possibly_add_compiler_threads();
1783 }
1784
1785 // Give compiler threads an extra quanta. They tend to be bursty and
1786 // this helps the compiler to finish up the job.
1787 if (CompilerThreadHintNoPreempt) {
1788 os::hint_no_preempt();
1789 }
1790
1791 // Assign the task to the current thread. Mark this compilation
1792 // thread as active for the profiler.
1793 CompileTaskWrapper ctw(task);
1794 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1795 task->set_code_handle(&result_handle);
1796 methodHandle method(thread, task->method());
1797
1798 // Never compile a method if breakpoints are present in it
1799 if (method()->number_of_breakpoints() == 0) {
1800 // Compile the method.
1801 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1802 invoke_compiler_on_method(task);
1803 thread->start_idle_timer();
1804 } else {
1805 // After compilation is disabled, remove remaining methods from queue
1806 method->clear_queued_for_compilation();
1807 task->set_failure_reason("compilation is disabled");
1808 }
1809 }
1810 }
1811
1812 // Shut down compiler runtime
1813 shutdown_compiler_runtime(thread->compiler(), thread);
1814 }
1815
1816 // ------------------------------------------------------------------
1817 // CompileBroker::init_compiler_thread_log
1818 //
1819 // Set up state required by +LogCompilation.
1820 void CompileBroker::init_compiler_thread_log() {
1821 CompilerThread* thread = CompilerThread::current();
1822 char file_name[4*K];
1823 FILE* fp = NULL;
1824 intx thread_id = os::current_thread_id();
1825 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1826 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1827 if (dir == NULL) {
1828 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1829 thread_id, os::current_process_id());
1830 } else {
1831 jio_snprintf(file_name, sizeof(file_name),
1832 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1833 os::file_separator(), thread_id, os::current_process_id());
1834 }
1835
1836 fp = fopen(file_name, "wt");
1837 if (fp != NULL) {
1838 if (LogCompilation && Verbose) {
1839 tty->print_cr("Opening compilation log %s", file_name);
1840 }
1841 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1842 if (log == NULL) {
1843 fclose(fp);
1844 return;
1845 }
1846 thread->init_log(log);
1847
1848 if (xtty != NULL) {
1849 ttyLocker ttyl;
1850 // Record any per thread log files
1851 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1852 }
1853 return;
1854 }
1855 }
1856 warning("Cannot open log file: %s", file_name);
1857 }
1858
1859 void CompileBroker::log_metaspace_failure() {
1860 const char* message = "some methods may not be compiled because metaspace "
1861 "is out of memory";
1862 if (_compilation_log != NULL) {
1863 _compilation_log->log_metaspace_failure(message);
1864 }
1865 if (PrintCompilation) {
1866 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1867 }
1868 }
1869
1870
1871 // ------------------------------------------------------------------
1872 // CompileBroker::set_should_block
1873 //
1874 // Set _should_block.
1875 // Call this from the VM, with Threads_lock held and a safepoint requested.
1876 void CompileBroker::set_should_block() {
1877 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1878 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1879 #ifndef PRODUCT
1880 if (PrintCompilation && (Verbose || WizardMode))
1881 tty->print_cr("notifying compiler thread pool to block");
1882 #endif
1883 _should_block = true;
1884 }
1885
1886 // ------------------------------------------------------------------
1887 // CompileBroker::maybe_block
1888 //
1889 // Call this from the compiler at convenient points, to poll for _should_block.
1890 void CompileBroker::maybe_block() {
1891 if (_should_block) {
1892 #ifndef PRODUCT
1893 if (PrintCompilation && (Verbose || WizardMode))
1894 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1895 #endif
1896 ThreadInVMfromNative tivfn(JavaThread::current());
1897 }
1898 }
1899
1900 // wrapper for CodeCache::print_summary()
1901 static void codecache_print(bool detailed)
1902 {
1903 ResourceMark rm;
1904 stringStream s;
1905 // Dump code cache into a buffer before locking the tty,
1906 {
1907 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1908 CodeCache::print_summary(&s, detailed);
1909 }
1910 ttyLocker ttyl;
1911 tty->print("%s", s.as_string());
1912 }
1913
1914 // wrapper for CodeCache::print_summary() using outputStream
1915 static void codecache_print(outputStream* out, bool detailed) {
1916 ResourceMark rm;
1917 stringStream s;
1918
1919 // Dump code cache into a buffer
1920 {
1921 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1922 CodeCache::print_summary(&s, detailed);
1923 }
1924
1925 char* remaining_log = s.as_string();
1926 while (*remaining_log != '\0') {
1927 char* eol = strchr(remaining_log, '\n');
1928 if (eol == NULL) {
1929 out->print_cr("%s", remaining_log);
1930 remaining_log = remaining_log + strlen(remaining_log);
1931 } else {
1932 *eol = '\0';
1933 out->print_cr("%s", remaining_log);
1934 remaining_log = eol + 1;
1935 }
1936 }
1937 }
1938
1939 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env) {
1940 if (success) {
1941 task->mark_success();
1942 if (ci_env != NULL) {
1943 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1944 }
1945 if (_compilation_log != NULL) {
1946 nmethod* code = task->code();
1947 if (code != NULL) {
1948 _compilation_log->log_nmethod(thread, code);
1949 }
1950 }
1951 }
1952 // simulate crash during compilation
1953 assert(task->compile_id() != CICrashAt, "just as planned");
1954 }
1955
1956 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
1957 assert(event != NULL, "invariant");
1958 assert(event->should_commit(), "invariant");
1959 event->set_method(task->method());
1960 event->set_compileId(task->compile_id());
1961 event->set_compileLevel(task->comp_level());
1962 event->set_succeded(task->is_success());
1963 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1964 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1965 event->set_inlinedBytes(task->num_inlined_bytecodes());
1966 event->commit();
1967 }
1968
1969 int DirectivesStack::_depth = 0;
1970 CompilerDirectives* DirectivesStack::_top = NULL;
1971 CompilerDirectives* DirectivesStack::_bottom = NULL;
1972
1973 // ------------------------------------------------------------------
1974 // CompileBroker::invoke_compiler_on_method
1975 //
1976 // Compile a method.
1977 //
1978 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1979 task->print_ul();
1980 if (PrintCompilation) {
1981 ResourceMark rm;
1982 task->print_tty();
1983 }
1984 elapsedTimer time;
1985
1986 CompilerThread* thread = CompilerThread::current();
1987 ResourceMark rm(thread);
1988
1989 if (LogEvents) {
1990 _compilation_log->log_compile(thread, task);
1991 }
1992
1993 // Common flags.
1994 uint compile_id = task->compile_id();
1995 int osr_bci = task->osr_bci();
1996 bool is_osr = (osr_bci != standard_entry_bci);
1997 bool should_log = (thread->log() != NULL);
1998 bool should_break = false;
1999 const int task_level = task->comp_level();
2000 AbstractCompiler* comp = task->compiler();
2001
2002 DirectiveSet* directive;
2003 {
2004 // create the handle inside it's own block so it can't
2005 // accidentally be referenced once the thread transitions to
2006 // native. The NoHandleMark before the transition should catch
2007 // any cases where this occurs in the future.
2008 methodHandle method(thread, task->method());
2009 assert(!method->is_native(), "no longer compile natives");
2010
2011 // Look up matching directives
2012 directive = DirectivesStack::getMatchingDirective(method, comp);
2013
2014 // Save information about this method in case of failure.
2015 set_last_compile(thread, method, is_osr, task_level);
2016
2017 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2018 }
2019
2020 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2021 if (should_log && !directive->LogOption) {
2022 should_log = false;
2023 }
2024
2025 // Allocate a new set of JNI handles.
2026 push_jni_handle_block();
2027 Method* target_handle = task->method();
2028 int compilable = ciEnv::MethodCompilable;
2029 const char* failure_reason = NULL;
2030 const char* retry_message = NULL;
2031
2032 int system_dictionary_modification_counter;
2033 {
2034 MutexLocker locker(Compile_lock, thread);
2035 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
2036 }
2037
2038 #if INCLUDE_JVMCI
2039 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2040 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2041
2042 TraceTime t1("compilation", &time);
2043 EventCompilation event;
2044
2045 // Skip redefined methods
2046 if (target_handle->is_old()) {
2047 failure_reason = "redefined method";
2048 retry_message = "not retryable";
2049 compilable = ciEnv::MethodCompilable_never;
2050 } else {
2051 JVMCIEnv env(task, system_dictionary_modification_counter);
2052 methodHandle method(thread, target_handle);
2053 jvmci->compile_method(method, osr_bci, &env);
2054
2055 failure_reason = env.failure_reason();
2056 if (!env.retryable()) {
2057 retry_message = "not retryable";
2058 compilable = ciEnv::MethodCompilable_not_at_tier;
2059 }
2060 }
2061 post_compile(thread, task, task->code() != NULL, NULL);
2062 if (event.should_commit()) {
2063 post_compilation_event(&event, task);
2064 }
2065
2066 } else
2067 #endif // INCLUDE_JVMCI
2068 {
2069 NoHandleMark nhm;
2070 ThreadToNativeFromVM ttn(thread);
2071
2072 ciEnv ci_env(task, system_dictionary_modification_counter);
2073 if (should_break) {
2074 ci_env.set_break_at_compile(true);
2075 }
2076 if (should_log) {
2077 ci_env.set_log(thread->log());
2078 }
2079 assert(thread->env() == &ci_env, "set by ci_env");
2080 // The thread-env() field is cleared in ~CompileTaskWrapper.
2081
2082 // Cache Jvmti state
2083 ci_env.cache_jvmti_state();
2084
2085 // Cache DTrace flags
2086 ci_env.cache_dtrace_flags();
2087
2088 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2089
2090 TraceTime t1("compilation", &time);
2091 EventCompilation event;
2092
2093 if (comp == NULL) {
2094 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2095 } else {
2096 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2097 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2098 while (WhiteBox::compilation_locked) {
2099 locker.wait(Mutex::_no_safepoint_check_flag);
2100 }
2101 }
2102 comp->compile_method(&ci_env, target, osr_bci, directive);
2103 }
2104
2105 if (!ci_env.failing() && task->code() == NULL) {
2106 //assert(false, "compiler should always document failure");
2107 // The compiler elected, without comment, not to register a result.
2108 // Do not attempt further compilations of this method.
2109 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2110 }
2111
2112 // Copy this bit to the enclosing block:
2113 compilable = ci_env.compilable();
2114
2115 if (ci_env.failing()) {
2116 failure_reason = ci_env.failure_reason();
2117 retry_message = ci_env.retry_message();
2118 ci_env.report_failure(failure_reason);
2119 }
2120
2121 post_compile(thread, task, !ci_env.failing(), &ci_env);
2122 if (event.should_commit()) {
2123 post_compilation_event(&event, task);
2124 }
2125 }
2126 // Remove the JNI handle block after the ciEnv destructor has run in
2127 // the previous block.
2128 pop_jni_handle_block();
2129
2130 if (failure_reason != NULL) {
2131 task->set_failure_reason(failure_reason);
2132 if (_compilation_log != NULL) {
2133 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2134 }
2135 if (PrintCompilation) {
2136 FormatBufferResource msg = retry_message != NULL ?
2137 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2138 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2139 task->print(tty, msg);
2140 }
2141 }
2142
2143 methodHandle method(thread, task->method());
2144
2145 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2146
2147 collect_statistics(thread, time, task);
2148
2149 nmethod* nm = task->code();
2150 if (nm != NULL) {
2151 nm->maybe_print_nmethod(directive);
2152 }
2153 DirectivesStack::release(directive);
2154
2155 if (PrintCompilation && PrintCompilation2) {
2156 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2157 tty->print("%4d ", compile_id); // print compilation number
2158 tty->print("%s ", (is_osr ? "%" : " "));
2159 if (task->code() != NULL) {
2160 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2161 }
2162 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2163 }
2164
2165 Log(compilation, codecache) log;
2166 if (log.is_debug()) {
2167 LogStream ls(log.debug());
2168 codecache_print(&ls, /* detailed= */ false);
2169 }
2170 if (PrintCodeCacheOnCompilation) {
2171 codecache_print(/* detailed= */ false);
2172 }
2173 // Disable compilation, if required.
2174 switch (compilable) {
2175 case ciEnv::MethodCompilable_never:
2176 if (is_osr)
2177 method->set_not_osr_compilable_quietly();
2178 else
2179 method->set_not_compilable_quietly();
2180 break;
2181 case ciEnv::MethodCompilable_not_at_tier:
2182 if (is_osr)
2183 method->set_not_osr_compilable_quietly(task_level);
2184 else
2185 method->set_not_compilable_quietly(task_level);
2186 break;
2187 }
2188
2189 // Note that the queued_for_compilation bits are cleared without
2190 // protection of a mutex. [They were set by the requester thread,
2191 // when adding the task to the compile queue -- at which time the
2192 // compile queue lock was held. Subsequently, we acquired the compile
2193 // queue lock to get this task off the compile queue; thus (to belabour
2194 // the point somewhat) our clearing of the bits must be occurring
2195 // only after the setting of the bits. See also 14012000 above.
2196 method->clear_queued_for_compilation();
2197
2198 #ifdef ASSERT
2199 if (CollectedHeap::fired_fake_oom()) {
2200 // The current compile received a fake OOM during compilation so
2201 // go ahead and exit the VM since the test apparently succeeded
2202 tty->print_cr("*** Shutting down VM after successful fake OOM");
2203 vm_exit(0);
2204 }
2205 #endif
2206 }
2207
2208 /**
2209 * The CodeCache is full. Print warning and disable compilation.
2210 * Schedule code cache cleaning so compilation can continue later.
2211 * This function needs to be called only from CodeCache::allocate(),
2212 * since we currently handle a full code cache uniformly.
2213 */
2214 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2215 UseInterpreter = true;
2216 if (UseCompiler || AlwaysCompileLoopMethods ) {
2217 if (xtty != NULL) {
2218 ResourceMark rm;
2219 stringStream s;
2220 // Dump code cache state into a buffer before locking the tty,
2221 // because log_state() will use locks causing lock conflicts.
2222 CodeCache::log_state(&s);
2223 // Lock to prevent tearing
2224 ttyLocker ttyl;
2225 xtty->begin_elem("code_cache_full");
2226 xtty->print("%s", s.as_string());
2227 xtty->stamp();
2228 xtty->end_elem();
2229 }
2230
2231 #ifndef PRODUCT
2232 if (CompileTheWorld || ExitOnFullCodeCache) {
2233 codecache_print(/* detailed= */ true);
2234 before_exit(JavaThread::current());
2235 exit_globals(); // will delete tty
2236 vm_direct_exit(CompileTheWorld ? 0 : 1);
2237 }
2238 #endif
2239 if (UseCodeCacheFlushing) {
2240 // Since code cache is full, immediately stop new compiles
2241 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2242 NMethodSweeper::log_sweep("disable_compiler");
2243 }
2244 } else {
2245 disable_compilation_forever();
2246 }
2247
2248 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2249 }
2250 }
2251
2252 // ------------------------------------------------------------------
2253 // CompileBroker::set_last_compile
2254 //
2255 // Record this compilation for debugging purposes.
2256 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2257 ResourceMark rm;
2258 char* method_name = method->name()->as_C_string();
2259 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2260 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2261 char current_method[CompilerCounters::cmname_buffer_length];
2262 size_t maxLen = CompilerCounters::cmname_buffer_length;
2263
2264 if (UsePerfData) {
2265 const char* class_name = method->method_holder()->name()->as_C_string();
2266
2267 size_t s1len = strlen(class_name);
2268 size_t s2len = strlen(method_name);
2269
2270 // check if we need to truncate the string
2271 if (s1len + s2len + 2 > maxLen) {
2272
2273 // the strategy is to lop off the leading characters of the
2274 // class name and the trailing characters of the method name.
2275
2276 if (s2len + 2 > maxLen) {
2277 // lop of the entire class name string, let snprintf handle
2278 // truncation of the method name.
2279 class_name += s1len; // null string
2280 }
2281 else {
2282 // lop off the extra characters from the front of the class name
2283 class_name += ((s1len + s2len + 2) - maxLen);
2284 }
2285 }
2286
2287 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2288 }
2289
2290 if (CICountOSR && is_osr) {
2291 _last_compile_type = osr_compile;
2292 } else {
2293 _last_compile_type = normal_compile;
2294 }
2295 _last_compile_level = comp_level;
2296
2297 if (UsePerfData) {
2298 CompilerCounters* counters = thread->counters();
2299 counters->set_current_method(current_method);
2300 counters->set_compile_type((jlong)_last_compile_type);
2301 }
2302 }
2303
2304
2305 // ------------------------------------------------------------------
2306 // CompileBroker::push_jni_handle_block
2307 //
2308 // Push on a new block of JNI handles.
2309 void CompileBroker::push_jni_handle_block() {
2310 JavaThread* thread = JavaThread::current();
2311
2312 // Allocate a new block for JNI handles.
2313 // Inlined code from jni_PushLocalFrame()
2314 JNIHandleBlock* java_handles = thread->active_handles();
2315 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2316 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2317 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2318 thread->set_active_handles(compile_handles);
2319 }
2320
2321
2322 // ------------------------------------------------------------------
2323 // CompileBroker::pop_jni_handle_block
2324 //
2325 // Pop off the current block of JNI handles.
2326 void CompileBroker::pop_jni_handle_block() {
2327 JavaThread* thread = JavaThread::current();
2328
2329 // Release our JNI handle block
2330 JNIHandleBlock* compile_handles = thread->active_handles();
2331 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2332 thread->set_active_handles(java_handles);
2333 compile_handles->set_pop_frame_link(NULL);
2334 JNIHandleBlock::release_block(compile_handles, thread); // may block
2335 }
2336
2337 // ------------------------------------------------------------------
2338 // CompileBroker::collect_statistics
2339 //
2340 // Collect statistics about the compilation.
2341
2342 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2343 bool success = task->is_success();
2344 methodHandle method (thread, task->method());
2345 uint compile_id = task->compile_id();
2346 bool is_osr = (task->osr_bci() != standard_entry_bci);
2347 nmethod* code = task->code();
2348 CompilerCounters* counters = thread->counters();
2349
2350 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2351 MutexLocker locker(CompileStatistics_lock);
2352
2353 // _perf variables are production performance counters which are
2354 // updated regardless of the setting of the CITime and CITimeEach flags
2355 //
2356
2357 // account all time, including bailouts and failures in this counter;
2358 // C1 and C2 counters are counting both successful and unsuccessful compiles
2359 _t_total_compilation.add(time);
2360
2361 if (!success) {
2362 _total_bailout_count++;
2363 if (UsePerfData) {
2364 _perf_last_failed_method->set_value(counters->current_method());
2365 _perf_last_failed_type->set_value(counters->compile_type());
2366 _perf_total_bailout_count->inc();
2367 }
2368 _t_bailedout_compilation.add(time);
2369 } else if (code == NULL) {
2370 if (UsePerfData) {
2371 _perf_last_invalidated_method->set_value(counters->current_method());
2372 _perf_last_invalidated_type->set_value(counters->compile_type());
2373 _perf_total_invalidated_count->inc();
2374 }
2375 _total_invalidated_count++;
2376 _t_invalidated_compilation.add(time);
2377 } else {
2378 // Compilation succeeded
2379
2380 // update compilation ticks - used by the implementation of
2381 // java.lang.management.CompilationMBean
2382 _perf_total_compilation->inc(time.ticks());
2383 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2384
2385 if (CITime) {
2386 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2387 if (is_osr) {
2388 _t_osr_compilation.add(time);
2389 _sum_osr_bytes_compiled += bytes_compiled;
2390 } else {
2391 _t_standard_compilation.add(time);
2392 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2393 }
2394
2395 #if INCLUDE_JVMCI
2396 AbstractCompiler* comp = compiler(task->comp_level());
2397 if (comp) {
2398 CompilerStatistics* stats = comp->stats();
2399 if (stats) {
2400 if (is_osr) {
2401 stats->_osr.update(time, bytes_compiled);
2402 } else {
2403 stats->_standard.update(time, bytes_compiled);
2404 }
2405 stats->_nmethods_size += code->total_size();
2406 stats->_nmethods_code_size += code->insts_size();
2407 } else { // if (!stats)
2408 assert(false, "Compiler statistics object must exist");
2409 }
2410 } else { // if (!comp)
2411 assert(false, "Compiler object must exist");
2412 }
2413 #endif // INCLUDE_JVMCI
2414 }
2415
2416 if (UsePerfData) {
2417 // save the name of the last method compiled
2418 _perf_last_method->set_value(counters->current_method());
2419 _perf_last_compile_type->set_value(counters->compile_type());
2420 _perf_last_compile_size->set_value(method->code_size() +
2421 task->num_inlined_bytecodes());
2422 if (is_osr) {
2423 _perf_osr_compilation->inc(time.ticks());
2424 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2425 } else {
2426 _perf_standard_compilation->inc(time.ticks());
2427 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2428 }
2429 }
2430
2431 if (CITimeEach) {
2432 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2433 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2434 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2435 }
2436
2437 // Collect counts of successful compilations
2438 _sum_nmethod_size += code->total_size();
2439 _sum_nmethod_code_size += code->insts_size();
2440 _total_compile_count++;
2441
2442 if (UsePerfData) {
2443 _perf_sum_nmethod_size->inc( code->total_size());
2444 _perf_sum_nmethod_code_size->inc(code->insts_size());
2445 _perf_total_compile_count->inc();
2446 }
2447
2448 if (is_osr) {
2449 if (UsePerfData) _perf_total_osr_compile_count->inc();
2450 _total_osr_compile_count++;
2451 } else {
2452 if (UsePerfData) _perf_total_standard_compile_count->inc();
2453 _total_standard_compile_count++;
2454 }
2455 }
2456 // set the current method for the thread to null
2457 if (UsePerfData) counters->set_current_method("");
2458 }
2459
2460 const char* CompileBroker::compiler_name(int comp_level) {
2461 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2462 if (comp == NULL) {
2463 return "no compiler";
2464 } else {
2465 return (comp->name());
2466 }
2467 }
2468
2469 #if INCLUDE_JVMCI
2470 void CompileBroker::print_times(AbstractCompiler* comp) {
2471 CompilerStatistics* stats = comp->stats();
2472 if (stats) {
2473 tty->print_cr(" %s {speed: %d bytes/s; standard: %6.3f s, %d bytes, %d methods; osr: %6.3f s, %d bytes, %d methods; nmethods_size: %d bytes; nmethods_code_size: %d bytes}",
2474 comp->name(), stats->bytes_per_second(),
2475 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2476 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2477 stats->_nmethods_size, stats->_nmethods_code_size);
2478 } else { // if (!stats)
2479 assert(false, "Compiler statistics object must exist");
2480 }
2481 comp->print_timers();
2482 }
2483 #endif // INCLUDE_JVMCI
2484
2485 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2486 #if INCLUDE_JVMCI
2487 elapsedTimer standard_compilation;
2488 elapsedTimer total_compilation;
2489 elapsedTimer osr_compilation;
2490
2491 int standard_bytes_compiled = 0;
2492 int osr_bytes_compiled = 0;
2493
2494 int standard_compile_count = 0;
2495 int osr_compile_count = 0;
2496 int total_compile_count = 0;
2497
2498 int nmethods_size = 0;
2499 int nmethods_code_size = 0;
2500 bool printedHeader = false;
2501
2502 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2503 AbstractCompiler* comp = _compilers[i];
2504 if (comp != NULL) {
2505 if (per_compiler && aggregate && !printedHeader) {
2506 printedHeader = true;
2507 tty->cr();
2508 tty->print_cr("Individual compiler times (for compiled methods only)");
2509 tty->print_cr("------------------------------------------------");
2510 tty->cr();
2511 }
2512 CompilerStatistics* stats = comp->stats();
2513
2514 if (stats) {
2515 standard_compilation.add(stats->_standard._time);
2516 osr_compilation.add(stats->_osr._time);
2517
2518 standard_bytes_compiled += stats->_standard._bytes;
2519 osr_bytes_compiled += stats->_osr._bytes;
2520
2521 standard_compile_count += stats->_standard._count;
2522 osr_compile_count += stats->_osr._count;
2523
2524 nmethods_size += stats->_nmethods_size;
2525 nmethods_code_size += stats->_nmethods_code_size;
2526 } else { // if (!stats)
2527 assert(false, "Compiler statistics object must exist");
2528 }
2529
2530 if (per_compiler) {
2531 print_times(comp);
2532 }
2533 }
2534 }
2535 total_compile_count = osr_compile_count + standard_compile_count;
2536 total_compilation.add(osr_compilation);
2537 total_compilation.add(standard_compilation);
2538
2539 // In hosted mode, print the JVMCI compiler specific counters manually.
2540 if (!UseJVMCICompiler) {
2541 JVMCICompiler::print_compilation_timers();
2542 }
2543 #else // INCLUDE_JVMCI
2544 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2545 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2546 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2547
2548 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2549 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2550
2551 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2552 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2553 int total_compile_count = CompileBroker::_total_compile_count;
2554
2555 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2556 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2557 #endif // INCLUDE_JVMCI
2558
2559 if (!aggregate) {
2560 return;
2561 }
2562 tty->cr();
2563 tty->print_cr("Accumulated compiler times");
2564 tty->print_cr("----------------------------------------------------------");
2565 //0000000000111111111122222222223333333333444444444455555555556666666666
2566 //0123456789012345678901234567890123456789012345678901234567890123456789
2567 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2568 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2569 standard_compilation.seconds(),
2570 standard_compilation.seconds() / standard_compile_count);
2571 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2572 CompileBroker::_t_bailedout_compilation.seconds(),
2573 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2574 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2575 osr_compilation.seconds(),
2576 osr_compilation.seconds() / osr_compile_count);
2577 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2578 CompileBroker::_t_invalidated_compilation.seconds(),
2579 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2580
2581 AbstractCompiler *comp = compiler(CompLevel_simple);
2582 if (comp != NULL) {
2583 tty->cr();
2584 comp->print_timers();
2585 }
2586 comp = compiler(CompLevel_full_optimization);
2587 if (comp != NULL) {
2588 tty->cr();
2589 comp->print_timers();
2590 }
2591 tty->cr();
2592 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2593 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2594 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2595 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2596 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2597 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2598 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2599 double tcs = total_compilation.seconds();
2600 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2601 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2602 tty->cr();
2603 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2604 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2605 }
2606
2607 // Debugging output for failure
2608 void CompileBroker::print_last_compile() {
2609 if (_last_compile_level != CompLevel_none &&
2610 compiler(_last_compile_level) != NULL &&
2611 _last_compile_type != no_compile) {
2612 if (_last_compile_type == osr_compile) {
2613 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2614 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2615 } else {
2616 tty->print_cr("Last parse: %d+++(%d) %s",
2617 _compilation_id, _last_compile_level, _last_method_compiled);
2618 }
2619 }
2620 }
2621
2622 // Print general/accumulated JIT information.
2623 void CompileBroker::print_info(outputStream *out) {
2624 if (out == NULL) out = tty;
2625 out->cr();
2626 out->print_cr("======================");
2627 out->print_cr(" General JIT info ");
2628 out->print_cr("======================");
2629 out->cr();
2630 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2631 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2632 out->cr();
2633 out->print_cr("CodeCache overview");
2634 out->print_cr("--------------------------------------------------------");
2635 out->cr();
2636 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2637 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2638 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2639 out->cr();
2640
2641 out->cr();
2642 out->print_cr("CodeCache cleaning overview");
2643 out->print_cr("--------------------------------------------------------");
2644 out->cr();
2645 NMethodSweeper::print(out);
2646 out->print_cr("--------------------------------------------------------");
2647 out->cr();
2648 }
2649
2650 // Note: tty_lock must not be held upon entry to this function.
2651 // Print functions called from herein do "micro-locking" on tty_lock.
2652 // That's a tradeoff which keeps together important blocks of output.
2653 // At the same time, continuous tty_lock hold time is kept in check,
2654 // preventing concurrently printing threads from stalling a long time.
2655 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2656 TimeStamp ts_total;
2657 TimeStamp ts;
2658
2659 bool allFun = !strcmp(function, "all");
2660 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2661 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2662 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2663 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2664 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2665 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2666 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2667 bool discard = !strcmp(function, "discard") || allFun;
2668
2669 if (out == NULL) {
2670 out = tty;
2671 }
2672
2673 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2674 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2675 out->cr();
2676 return;
2677 }
2678
2679 ts_total.update(); // record starting point
2680
2681 if (aggregate) {
2682 print_info(out);
2683 }
2684
2685 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2686 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function.
2687 // When we request individual parts of the analysis via the jcmd interface, it is possible
2688 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2689 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2690 // across user interaction.
2691 ts.update(); // record starting point
2692 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2693 out->cr();
2694 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds());
2695 out->cr();
2696
2697 if (aggregate) {
2698 // It is sufficient to hold the CodeCache_lock only for the aggregate step.
2699 // All other functions operate on aggregated data - except MethodNames, but that should be safe.
2700 // The separate CodeHeapStateAnalytics_lock protects the printing functions against
2701 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock.
2702 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2703 // leading to an unnecessarily long hold time of the CodeCache_lock.
2704 ts.update(); // record starting point
2705 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2706 out->cr();
2707 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds());
2708 out->cr();
2709
2710 ts.update(); // record starting point
2711 CodeCache::aggregate(out, granularity);
2712 out->cr();
2713 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds());
2714 out->cr();
2715 }
2716
2717 if (usedSpace) CodeCache::print_usedSpace(out);
2718 if (freeSpace) CodeCache::print_freeSpace(out);
2719 if (methodCount) CodeCache::print_count(out);
2720 if (methodSpace) CodeCache::print_space(out);
2721 if (methodAge) CodeCache::print_age(out);
2722 if (methodNames) CodeCache::print_names(out);
2723 if (discard) CodeCache::discard(out);
2724
2725 out->cr();
2726 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds());
2727 out->cr();
2728 }