1 /*
2 * Copyright (c) 1999, 2025, 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 "cds/aotLinkedClassBulkLoader.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmClasses.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/aotCodeCache.hpp"
32 #include "code/codeCache.hpp"
33 #include "code/codeHeapState.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "compiler/compilationLog.hpp"
36 #include "compiler/compilationMemoryStatistic.hpp"
37 #include "compiler/compilationPolicy.hpp"
38 #include "compiler/compileBroker.hpp"
39 #include "compiler/compileLog.hpp"
40 #include "compiler/compilerDefinitions.inline.hpp"
41 #include "compiler/compilerEvent.hpp"
42 #include "compiler/compilerOracle.hpp"
43 #include "compiler/directivesParser.hpp"
44 #include "compiler/recompilationPolicy.hpp"
45 #include "gc/shared/memAllocator.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/allocation.inline.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/methodData.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/nativeLookup.hpp"
59 #include "prims/whitebox.hpp"
60 #include "runtime/atomic.hpp"
61 #include "runtime/escapeBarrier.hpp"
62 #include "runtime/globals_extension.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/init.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jniHandles.inline.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/safepointVerifiers.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/threads.hpp"
74 #include "runtime/threadSMR.inline.hpp"
75 #include "runtime/timerTrace.hpp"
76 #include "runtime/vframe.inline.hpp"
77 #include "services/management.hpp"
78 #include "utilities/debug.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/events.hpp"
81 #include "utilities/formatBuffer.hpp"
82 #include "utilities/macros.hpp"
83 #include "utilities/nonblockingQueue.inline.hpp"
84 #ifdef COMPILER1
85 #include "c1/c1_Compiler.hpp"
86 #endif
87 #ifdef COMPILER2
88 #include "opto/c2compiler.hpp"
89 #endif
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciEnv.hpp"
92 #include "jvmci/jvmciRuntime.hpp"
93 #endif
94
95 #ifdef DTRACE_ENABLED
96
97 // Only bother with this argument setup if dtrace is available
98
99 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
100 { \
101 Symbol* klass_name = (method)->klass_name(); \
102 Symbol* name = (method)->name(); \
103 Symbol* signature = (method)->signature(); \
104 HOTSPOT_METHOD_COMPILE_BEGIN( \
105 (char *) comp_name, strlen(comp_name), \
106 (char *) klass_name->bytes(), klass_name->utf8_length(), \
107 (char *) name->bytes(), name->utf8_length(), \
108 (char *) signature->bytes(), signature->utf8_length()); \
109 }
110
111 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
112 { \
113 Symbol* klass_name = (method)->klass_name(); \
114 Symbol* name = (method)->name(); \
115 Symbol* signature = (method)->signature(); \
116 HOTSPOT_METHOD_COMPILE_END( \
117 (char *) comp_name, strlen(comp_name), \
118 (char *) klass_name->bytes(), klass_name->utf8_length(), \
119 (char *) name->bytes(), name->utf8_length(), \
120 (char *) signature->bytes(), signature->utf8_length(), (success)); \
121 }
122
123 #else // ndef DTRACE_ENABLED
124
125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
126 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
127
128 #endif // ndef DTRACE_ENABLED
129
130 bool CompileBroker::_initialized = false;
131 volatile bool CompileBroker::_should_block = false;
132 volatile int CompileBroker::_print_compilation_warning = 0;
133 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
134
135 // The installed compiler(s)
136 AbstractCompiler* CompileBroker::_compilers[2];
137
138 // The maximum numbers of compiler threads to be determined during startup.
139 int CompileBroker::_c1_count = 0;
140 int CompileBroker::_c2_count = 0;
141 int CompileBroker::_ac_count = 0;
142
143 // An array of compiler names as Java String objects
144 jobject* CompileBroker::_compiler1_objects = nullptr;
145 jobject* CompileBroker::_compiler2_objects = nullptr;
146 jobject* CompileBroker::_ac_objects = nullptr;
147
148 CompileLog** CompileBroker::_compiler1_logs = nullptr;
149 CompileLog** CompileBroker::_compiler2_logs = nullptr;
150 CompileLog** CompileBroker::_ac_logs = nullptr;
151
152 // These counters are used to assign an unique ID to each compilation.
153 volatile jint CompileBroker::_compilation_id = 0;
154 volatile jint CompileBroker::_osr_compilation_id = 0;
155 volatile jint CompileBroker::_native_compilation_id = 0;
156
157 // Performance counters
158 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
159 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
160 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
161
162 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
163 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
164 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
165 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
166 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
167
168 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
169 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
170 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
171 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
172
173 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
174 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
175 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
176 PerfVariable* CompileBroker::_perf_last_compile_type = nullptr;
177 PerfVariable* CompileBroker::_perf_last_compile_size = nullptr;
178 PerfVariable* CompileBroker::_perf_last_failed_type = nullptr;
179 PerfVariable* CompileBroker::_perf_last_invalidated_type = nullptr;
180
181 // Timers and counters for generating statistics
182 elapsedTimer CompileBroker::_t_total_compilation;
183 elapsedTimer CompileBroker::_t_osr_compilation;
184 elapsedTimer CompileBroker::_t_standard_compilation;
185 elapsedTimer CompileBroker::_t_invalidated_compilation;
186 elapsedTimer CompileBroker::_t_bailedout_compilation;
187
188 uint CompileBroker::_total_bailout_count = 0;
189 uint CompileBroker::_total_invalidated_count = 0;
190 uint CompileBroker::_total_not_entrant_count = 0;
191 uint CompileBroker::_total_compile_count = 0;
192 uint CompileBroker::_total_osr_compile_count = 0;
193 uint CompileBroker::_total_standard_compile_count = 0;
194 uint CompileBroker::_total_compiler_stopped_count = 0;
195 uint CompileBroker::_total_compiler_restarted_count = 0;
196
197 uint CompileBroker::_sum_osr_bytes_compiled = 0;
198 uint CompileBroker::_sum_standard_bytes_compiled = 0;
199 uint CompileBroker::_sum_nmethod_size = 0;
200 uint CompileBroker::_sum_nmethod_code_size = 0;
201
202 jlong CompileBroker::_peak_compilation_time = 0;
203
204 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
205 CompilerStatistics CompileBroker::_aot_stats;
206 CompilerStatistics CompileBroker::_aot_stats_per_level[CompLevel_full_optimization + 1];
207
208 CompileQueue* CompileBroker::_c2_compile_queue = nullptr;
209 CompileQueue* CompileBroker::_c1_compile_queue = nullptr;
210 CompileQueue* CompileBroker::_ac1_compile_queue = nullptr;
211 CompileQueue* CompileBroker::_ac2_compile_queue = nullptr;
212
213 bool compileBroker_init() {
214 if (LogEvents) {
215 CompilationLog::init();
216 }
217
218 // init directives stack, adding default directive
219 DirectivesStack::init();
220
221 if (DirectivesParser::has_file()) {
222 return DirectivesParser::parse_from_flag();
223 } else if (CompilerDirectivesPrint) {
224 // Print default directive even when no other was added
225 DirectivesStack::print(tty);
226 }
227
228 return true;
229 }
230
231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
232 CompilerThread* thread = CompilerThread::current();
233 thread->set_task(task);
234 CompileLog* log = thread->log();
235 thread->timeout()->arm();
236 if (log != nullptr && !task->is_unloaded()) task->log_task_start(log);
237 }
238
239 CompileTaskWrapper::~CompileTaskWrapper() {
240 CompilerThread* thread = CompilerThread::current();
241 CompileTask* task = thread->task();
242 CompileLog* log = thread->log();
243 AbstractCompiler* comp = thread->compiler();
244 if (log != nullptr && !task->is_unloaded()) task->log_task_done(log);
245 thread->set_task(nullptr);
246 thread->set_env(nullptr);
247 thread->timeout()->disarm();
248 if (task->is_blocking()) {
249 bool free_task = false;
250 {
251 MutexLocker notifier(thread, CompileTaskWait_lock);
252 task->mark_complete();
253 #if INCLUDE_JVMCI
254 if (comp->is_jvmci()) {
255 if (!task->has_waiter()) {
256 // The waiting thread timed out and thus did not delete the task.
257 free_task = true;
258 }
259 task->set_blocking_jvmci_compile_state(nullptr);
260 }
261 #endif
262 if (!free_task) {
263 // Notify the waiting thread that the compilation has completed
264 // so that it can free the task.
265 CompileTaskWait_lock->notify_all();
266 }
267 }
268 if (free_task) {
269 // The task can only be deleted once the task lock is released.
270 delete task;
271 }
272 } else {
273 task->mark_complete();
274
275 // By convention, the compiling thread is responsible for deleting
276 // a non-blocking CompileTask.
277 delete task;
278 }
279 }
280
281 /**
282 * Check if a CompilerThread can be removed and update count if requested.
283 */
284 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
285 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
286 if (!ReduceNumberOfCompilerThreads) return false;
287
288 if (RecompilationPolicy::have_recompilation_work()) return false;
289
290 AbstractCompiler *compiler = ct->compiler();
291 int compiler_count = compiler->num_compiler_threads();
292 bool c1 = compiler->is_c1();
293
294 // Keep at least 1 compiler thread of each type.
295 if (compiler_count < 2) return false;
296
297 // Keep thread alive for at least some time.
298 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
299
300 #if INCLUDE_JVMCI
301 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
302 // Handles for JVMCI thread objects may get released concurrently.
303 if (do_it) {
304 assert(CompileThread_lock->owner() == ct, "must be holding lock");
305 } else {
306 // Skip check if it's the last thread and let caller check again.
307 return true;
308 }
309 }
310 #endif
311
312 // We only allow the last compiler thread of each type to get removed.
313 jobject last_compiler = c1 ? compiler1_object(compiler_count - 1)
314 : compiler2_object(compiler_count - 1);
315 if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) {
316 if (do_it) {
317 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
318 compiler->set_num_compiler_threads(compiler_count - 1);
319 #if INCLUDE_JVMCI
320 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
321 // Old j.l.Thread object can die when no longer referenced elsewhere.
322 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
323 _compiler2_objects[compiler_count - 1] = nullptr;
324 }
325 #endif
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(_lock->owned_by_self(), "must own lock");
337
338 task->set_next(nullptr);
339 task->set_prev(nullptr);
340
341 if (_last == nullptr) {
342 // The compile queue is empty.
343 assert(_first == nullptr, "queue is empty");
344 _first = task;
345 _last = task;
346 } else {
347 // Append the task to the queue.
348 assert(_last->next() == nullptr, "not last");
349 _last->set_next(task);
350 task->set_prev(_last);
351 _last = task;
352 }
353 ++_size;
354 ++_total_added;
355 if (_size > _peak_size) {
356 _peak_size = _size;
357 }
358
359 // Mark the method as being in the compile queue.
360 task->method()->set_queued_for_compilation();
361
362 task->mark_queued(os::elapsed_counter());
363
364 if (CIPrintCompileQueue) {
365 print_tty();
366 }
367
368 if (LogCompilation && xtty != nullptr) {
369 task->log_task_queued();
370 }
371
372 if (TrainingData::need_data() && !CDSConfig::is_dumping_final_static_archive()) {
373 CompileTrainingData* ctd = CompileTrainingData::make(task);
374 if (ctd != nullptr) {
375 task->set_training_data(ctd);
376 }
377 }
378
379 // Notify CompilerThreads that a task is available.
380 _lock->notify_all();
381 }
382
383 void CompileQueue::add_pending(CompileTask* task) {
384 assert(_lock->owned_by_self() == false, "must NOT own lock");
385 assert(UseLockFreeCompileQueues, "");
386 task->method()->set_queued_for_compilation();
387 _queue.push(*task);
388 // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
389 if (is_empty()) {
390 MutexLocker ml(_lock);
391 _lock->notify_all();
392 }
393 }
394
395 static bool process_pending(CompileTask* task) {
396 // guarantee(task->method()->queued_for_compilation(), "");
397 if (task->is_unloaded()) {
398 return true; // unloaded
399 }
400 task->method()->set_queued_for_compilation(); // FIXME
401 if (task->method()->pending_queue_processed()) {
402 return true; // already queued
403 }
404 // Mark the method as being in the compile queue.
405 task->method()->set_pending_queue_processed();
406 if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
407 task->requires_online_compilation(), task->compile_reason())) {
408 return true; // already compiled
409 }
410 return false; // active
411 }
412
413 void CompileQueue::transfer_pending() {
414 assert(_lock->owned_by_self(), "must own lock");
415
416 CompileTask* task;
417 while ((task = _queue.pop()) != nullptr) {
418 bool is_stale = process_pending(task);
419 if (is_stale) {
420 task->set_next(_first_stale);
421 task->set_prev(nullptr);
422 _first_stale = task;
423 } else {
424 add(task);
425 }
426 }
427 }
428
429 /**
430 * Empties compilation queue by deleting all compilation tasks.
431 * Furthermore, the method wakes up all threads that are waiting
432 * on a compilation task to finish. This can happen if background
433 * compilation is disabled.
434 */
435 void CompileQueue::delete_all() {
436 MutexLocker mu(_lock);
437 transfer_pending();
438
439 CompileTask* current = _first;
440
441 // Iterate over all tasks in the compile queue
442 while (current != nullptr) {
443 CompileTask* next = current->next();
444 if (!current->is_blocking()) {
445 // Non-blocking task. No one is waiting for it, delete it now.
446 delete current;
447 } else {
448 // Blocking task. By convention, it is the waiters responsibility
449 // to delete the task. We cannot delete it here, because we do not
450 // coordinate with waiters. We will notify the waiters later.
451 }
452 current = next;
453 }
454 _first = nullptr;
455 _last = nullptr;
456
457 // Wake up all blocking task waiters to deal with remaining blocking
458 // tasks. This is not a performance sensitive path, so we do this
459 // unconditionally to simplify coding/testing.
460 {
461 MonitorLocker ml(Thread::current(), CompileTaskWait_lock);
462 ml.notify_all();
463 }
464
465 // Wake up all threads that block on the queue.
466 _lock->notify_all();
467 }
468
469 /**
470 * Get the next CompileTask from a CompileQueue
471 */
472 CompileTask* CompileQueue::get(CompilerThread* thread) {
473 // save methods from RedefineClasses across safepoint
474 // across compile queue lock below.
475 methodHandle save_method;
476
477 MonitorLocker locker(_lock);
478 transfer_pending();
479
480 RecompilationPolicy::sample_load_average();
481
482 // If _first is null we have no more compile jobs. There are two reasons for
483 // having no compile jobs: First, we compiled everything we wanted. Second,
484 // we ran out of code cache so compilation has been disabled. In the latter
485 // case we perform code cache sweeps to free memory such that we can re-enable
486 // compilation.
487 while (_first == nullptr) {
488 // Exit loop if compilation is disabled forever
489 if (CompileBroker::is_compilation_disabled_forever()) {
490 return nullptr;
491 }
492
493 AbstractCompiler* compiler = thread->compiler();
494 guarantee(compiler != nullptr, "Compiler object must exist");
495 compiler->on_empty_queue(this, thread);
496 if (_first != nullptr) {
497 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
498 // so check again whether any tasks were added to the queue.
499 break;
500 }
501
502 // If we have added stale tasks, there might be waiters that want
503 // the notification these tasks have failed. Normally, this would
504 // be done by a compiler thread that would perform the purge at
505 // the end of some compilation. But, if compile queue is empty,
506 // there is no guarantee compilers would run and do the purge.
507 // Do the purge here and now to unblock the waiters.
508 // Perform this until we run out of stale tasks.
509 while (_first_stale != nullptr) {
510 purge_stale_tasks();
511 }
512 if (_first != nullptr) {
513 // Purge stale tasks may have transferred some new tasks,
514 // so check again.
515 break;
516 }
517
518 // If there are no compilation tasks and we can compile new jobs
519 // (i.e., there is enough free space in the code cache) there is
520 // no need to invoke the GC.
521 // We need a timed wait here, since compiler threads can exit if compilation
522 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
523 // is not critical and we do not want idle compiler threads to wake up too often.
524 locker.wait(5*1000);
525
526 transfer_pending(); // reacquired lock
527
528 if (RecompilationPolicy::have_recompilation_work()) return nullptr;
529
530 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
531 // Still nothing to compile. Give caller a chance to stop this thread.
532 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
533 }
534 }
535
536 if (CompileBroker::is_compilation_disabled_forever()) {
537 return nullptr;
538 }
539
540 CompileTask* task;
541 {
542 NoSafepointVerifier nsv;
543 task = CompilationPolicy::select_task(this, thread);
544 if (task != nullptr) {
545 task = task->select_for_compilation();
546 }
547 }
548
549 if (task != nullptr) {
550 // Save method pointers across unlock safepoint. The task is removed from
551 // the compilation queue, which is walked during RedefineClasses.
552 Thread* thread = Thread::current();
553 save_method = methodHandle(thread, task->method());
554
555 remove(task);
556 }
557 purge_stale_tasks(); // may temporarily release MCQ lock
558 return task;
559 }
560
561 // Clean & deallocate stale compile tasks.
562 // Temporarily releases MethodCompileQueue lock.
563 void CompileQueue::purge_stale_tasks() {
564 assert(_lock->owned_by_self(), "must own lock");
565 if (_first_stale != nullptr) {
566 // Stale tasks are purged when MCQ lock is released,
567 // but _first_stale updates are protected by MCQ lock.
568 // Once task processing starts and MCQ lock is released,
569 // other compiler threads can reuse _first_stale.
570 CompileTask* head = _first_stale;
571 _first_stale = nullptr;
572 {
573 MutexUnlocker ul(_lock);
574 for (CompileTask* task = head; task != nullptr; ) {
575 CompileTask* next_task = task->next();
576 task->set_next(nullptr);
577 CompileTaskWrapper ctw(task); // Frees the task
578 task->set_failure_reason("stale task");
579 task = next_task;
580 }
581 }
582 transfer_pending(); // transfer pending after reacquiring MCQ lock
583 }
584 }
585
586 void CompileQueue::remove(CompileTask* task) {
587 assert(_lock->owned_by_self(), "must own lock");
588 if (task->prev() != nullptr) {
589 task->prev()->set_next(task->next());
590 } else {
591 // max is the first element
592 assert(task == _first, "Sanity");
593 _first = task->next();
594 }
595
596 if (task->next() != nullptr) {
597 task->next()->set_prev(task->prev());
598 } else {
599 // max is the last element
600 assert(task == _last, "Sanity");
601 _last = task->prev();
602 }
603 task->set_next(nullptr);
604 task->set_prev(nullptr);
605 --_size;
606 ++_total_removed;
607 }
608
609 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
610 assert(_lock->owned_by_self(), "must own lock");
611 remove(task);
612
613 // Enqueue the task for reclamation (should be done outside MCQ lock)
614 task->set_next(_first_stale);
615 task->set_prev(nullptr);
616 _first_stale = task;
617 }
618
619 // methods in the compile queue need to be marked as used on the stack
620 // so that they don't get reclaimed by Redefine Classes
621 void CompileQueue::mark_on_stack() {
622 for (CompileTask* task = _first; task != nullptr; task = task->next()) {
623 task->mark_on_stack();
624 }
625 for (CompileTask* task = _queue.first(); !_queue.is_end(task); task = task->next()) {
626 assert(task != nullptr, "");
627 task->mark_on_stack();
628 }
629 }
630
631
632 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_aot) {
633 if (is_c2_compile(comp_level)) return ((is_aot && (_ac_count > 0)) ? _ac2_compile_queue : _c2_compile_queue);
634 if (is_c1_compile(comp_level)) return ((is_aot && (_ac_count > 0)) ? _ac1_compile_queue : _c1_compile_queue);
635 return nullptr;
636 }
637
638 CompileQueue* CompileBroker::c1_compile_queue() {
639 return _c1_compile_queue;
640 }
641
642 CompileQueue* CompileBroker::c2_compile_queue() {
643 return _c2_compile_queue;
644 }
645
646 void CompileBroker::print_compile_queues(outputStream* st) {
647 st->print_cr("Current compiles: ");
648
649 char buf[2000];
650 int buflen = sizeof(buf);
651 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
652
653 st->cr();
654 if (_c1_compile_queue != nullptr) {
655 _c1_compile_queue->print(st);
656 }
657 if (_c2_compile_queue != nullptr) {
658 _c2_compile_queue->print(st);
659 }
660 if (_ac1_compile_queue != nullptr) {
661 _ac1_compile_queue->print(st);
662 }
663 if (_ac2_compile_queue != nullptr) {
664 _ac2_compile_queue->print(st);
665 }
666 }
667
668 void CompileQueue::print(outputStream* st) {
669 assert_locked_or_safepoint(_lock);
670 st->print_cr("%s:", name());
671 CompileTask* task = _first;
672 if (task == nullptr) {
673 st->print_cr("Empty");
674 } else {
675 while (task != nullptr) {
676 task->print(st, nullptr, true, true);
677 task = task->next();
678 }
679 }
680 st->cr();
681 }
682
683 void CompileQueue::print_tty() {
684 stringStream ss;
685 // Dump the compile queue into a buffer before locking the tty
686 print(&ss);
687 {
688 ttyLocker ttyl;
689 tty->print("%s", ss.freeze());
690 }
691 }
692
693 CompilerCounters::CompilerCounters() {
694 _current_method[0] = '\0';
695 _compile_type = CompileBroker::no_compile;
696 }
697
698 #if INCLUDE_JFR && COMPILER2_OR_JVMCI
699 // It appends new compiler phase names to growable array phase_names(a new CompilerPhaseType mapping
700 // in compiler/compilerEvent.cpp) and registers it with its serializer.
701 //
702 // c2 uses explicit CompilerPhaseType idToPhase mapping in opto/phasetype.hpp,
703 // so if c2 is used, it should be always registered first.
704 // This function is called during vm initialization.
705 static void register_jfr_phasetype_serializer(CompilerType compiler_type) {
706 ResourceMark rm;
707 static bool first_registration = true;
708 if (compiler_type == compiler_jvmci) {
709 CompilerEvent::PhaseEvent::get_phase_id("NOT_A_PHASE_NAME", false, false, false);
710 first_registration = false;
711 #ifdef COMPILER2
712 } else if (compiler_type == compiler_c2) {
713 assert(first_registration, "invariant"); // c2 must be registered first.
714 for (int i = 0; i < PHASE_NUM_TYPES; i++) {
715 const char* phase_name = CompilerPhaseTypeHelper::to_description((CompilerPhaseType) i);
716 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
717 }
718 first_registration = false;
719 #endif // COMPILER2
720 }
721 }
722 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
723
724 // ------------------------------------------------------------------
725 // CompileBroker::compilation_init
726 //
727 // Initialize the Compilation object
728 void CompileBroker::compilation_init(JavaThread* THREAD) {
729 // No need to initialize compilation system if we do not use it.
730 if (!UseCompiler) {
731 return;
732 }
733 // Set the interface to the current compiler(s).
734 _c1_count = CompilationPolicy::c1_count();
735 _c2_count = CompilationPolicy::c2_count();
736 _ac_count = CompilationPolicy::ac_count();
737
738 #if INCLUDE_JVMCI
739 if (EnableJVMCI) {
740 // This is creating a JVMCICompiler singleton.
741 JVMCICompiler* jvmci = new JVMCICompiler();
742
743 if (UseJVMCICompiler) {
744 _compilers[1] = jvmci;
745 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
746 if (BootstrapJVMCI) {
747 // JVMCI will bootstrap so give it more threads
748 _c2_count = MIN2(32, os::active_processor_count());
749 }
750 } else {
751 _c2_count = JVMCIThreads;
752 }
753 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
754 } else {
755 #ifdef COMPILER1
756 _c1_count = JVMCIHostThreads;
757 #endif // COMPILER1
758 }
759 }
760 }
761 #endif // INCLUDE_JVMCI
762
763 #ifdef COMPILER1
764 if (_c1_count > 0) {
765 _compilers[0] = new Compiler();
766 }
767 #endif // COMPILER1
768
769 #ifdef COMPILER2
770 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
771 if (_c2_count > 0) {
772 _compilers[1] = new C2Compiler();
773 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
774 // idToPhase mapping for c2 is in opto/phasetype.hpp
775 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
776 }
777 }
778 #endif // COMPILER2
779
780 #if INCLUDE_JVMCI
781 // Register after c2 registration.
782 // JVMCI CompilerPhaseType idToPhase mapping is dynamic.
783 if (EnableJVMCI) {
784 JFR_ONLY(register_jfr_phasetype_serializer(compiler_jvmci);)
785 }
786 #endif // INCLUDE_JVMCI
787
788 if (CompilerOracle::should_collect_memstat()) {
789 CompilationMemoryStatistic::initialize();
790 }
791
792 // Start the compiler thread(s)
793 init_compiler_threads();
794 // totalTime performance counter is always created as it is required
795 // by the implementation of java.lang.management.CompilationMXBean.
796 {
797 // Ensure OOM leads to vm_exit_during_initialization.
798 EXCEPTION_MARK;
799 _perf_total_compilation =
800 PerfDataManager::create_counter(JAVA_CI, "totalTime",
801 PerfData::U_Ticks, CHECK);
802 }
803
804 if (UsePerfData) {
805
806 EXCEPTION_MARK;
807
808 // create the jvmstat performance counters
809 _perf_osr_compilation =
810 PerfDataManager::create_counter(SUN_CI, "osrTime",
811 PerfData::U_Ticks, CHECK);
812
813 _perf_standard_compilation =
814 PerfDataManager::create_counter(SUN_CI, "standardTime",
815 PerfData::U_Ticks, CHECK);
816
817 _perf_total_bailout_count =
818 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
819 PerfData::U_Events, CHECK);
820
821 _perf_total_invalidated_count =
822 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
823 PerfData::U_Events, CHECK);
824
825 _perf_total_compile_count =
826 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
827 PerfData::U_Events, CHECK);
828 _perf_total_osr_compile_count =
829 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
830 PerfData::U_Events, CHECK);
831
832 _perf_total_standard_compile_count =
833 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
834 PerfData::U_Events, CHECK);
835
836 _perf_sum_osr_bytes_compiled =
837 PerfDataManager::create_counter(SUN_CI, "osrBytes",
838 PerfData::U_Bytes, CHECK);
839
840 _perf_sum_standard_bytes_compiled =
841 PerfDataManager::create_counter(SUN_CI, "standardBytes",
842 PerfData::U_Bytes, CHECK);
843
844 _perf_sum_nmethod_size =
845 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
846 PerfData::U_Bytes, CHECK);
847
848 _perf_sum_nmethod_code_size =
849 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
850 PerfData::U_Bytes, CHECK);
851
852 _perf_last_method =
853 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
854 CompilerCounters::cmname_buffer_length,
855 "", CHECK);
856
857 _perf_last_failed_method =
858 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
859 CompilerCounters::cmname_buffer_length,
860 "", CHECK);
861
862 _perf_last_invalidated_method =
863 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
864 CompilerCounters::cmname_buffer_length,
865 "", CHECK);
866
867 _perf_last_compile_type =
868 PerfDataManager::create_variable(SUN_CI, "lastType",
869 PerfData::U_None,
870 (jlong)CompileBroker::no_compile,
871 CHECK);
872
873 _perf_last_compile_size =
874 PerfDataManager::create_variable(SUN_CI, "lastSize",
875 PerfData::U_Bytes,
876 (jlong)CompileBroker::no_compile,
877 CHECK);
878
879
880 _perf_last_failed_type =
881 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
882 PerfData::U_None,
883 (jlong)CompileBroker::no_compile,
884 CHECK);
885
886 _perf_last_invalidated_type =
887 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
888 PerfData::U_None,
889 (jlong)CompileBroker::no_compile,
890 CHECK);
891 }
892
893 log_info(aot, codecache, init)("CompileBroker is initialized");
894 _initialized = true;
895 }
896
897 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
898 Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
899 return thread_oop;
900 }
901
902 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
903 CompilationPolicy::replay_training_at_init_loop(thread);
904 }
905
906 #if defined(ASSERT) && COMPILER2_OR_JVMCI
907 // Entry for DeoptimizeObjectsALotThread. The threads are started in
908 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
909 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
910 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
911 bool enter_single_loop;
912 {
913 MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
914 static int single_thread_count = 0;
915 enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
916 }
917 if (enter_single_loop) {
918 dt->deoptimize_objects_alot_loop_single();
919 } else {
920 dt->deoptimize_objects_alot_loop_all();
921 }
922 }
923
924 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
925 // barrier targets a single thread which is selected round robin.
926 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_single() {
927 HandleMark hm(this);
928 while (true) {
929 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *deoptee_thread = jtiwh.next(); ) {
930 { // Begin new scope for escape barrier
931 HandleMarkCleaner hmc(this);
932 ResourceMark rm(this);
933 EscapeBarrier eb(true, this, deoptee_thread);
934 eb.deoptimize_objects(100);
935 }
936 // Now sleep after the escape barriers destructor resumed deoptee_thread.
937 sleep(DeoptimizeObjectsALotInterval);
938 }
939 }
940 }
941
942 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
943 // barrier targets all java threads in the vm at once.
944 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_all() {
945 HandleMark hm(this);
946 while (true) {
947 { // Begin new scope for escape barrier
948 HandleMarkCleaner hmc(this);
949 ResourceMark rm(this);
950 EscapeBarrier eb(true, this);
951 eb.deoptimize_objects_all_threads();
952 }
953 // Now sleep after the escape barriers destructor resumed the java threads.
954 sleep(DeoptimizeObjectsALotInterval);
955 }
956 }
957 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
958
959
960 JavaThread* CompileBroker::make_thread(ThreadType type, jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, JavaThread* THREAD) {
961 Handle thread_oop(THREAD, JNIHandles::resolve_non_null(thread_handle));
962
963 if (java_lang_Thread::thread(thread_oop()) != nullptr) {
964 assert(type == compiler_t, "should only happen with reused compiler threads");
965 // The compiler thread hasn't actually exited yet so don't try to reuse it
966 return nullptr;
967 }
968
969 JavaThread* new_thread = nullptr;
970 switch (type) {
971 case compiler_t:
972 assert(comp != nullptr, "Compiler instance missing.");
973 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
974 CompilerCounters* counters = new CompilerCounters();
975 new_thread = new CompilerThread(queue, counters);
976 }
977 break;
978 #if defined(ASSERT) && COMPILER2_OR_JVMCI
979 case deoptimizer_t:
980 new_thread = new DeoptimizeObjectsALotThread();
981 break;
982 #endif // ASSERT
983 case training_replay_t:
984 new_thread = new TrainingReplayThread();
985 break;
986 default:
987 ShouldNotReachHere();
988 }
989
990 // At this point the new CompilerThread data-races with this startup
991 // thread (which is the main thread and NOT the VM thread).
992 // This means Java bytecodes being executed at startup can
993 // queue compile jobs which will run at whatever default priority the
994 // newly created CompilerThread runs at.
995
996
997 // At this point it may be possible that no osthread was created for the
998 // JavaThread due to lack of resources. We will handle that failure below.
999 // Also check new_thread so that static analysis is happy.
1000 if (new_thread != nullptr && new_thread->osthread() != nullptr) {
1001
1002 if (type == compiler_t) {
1003 CompilerThread::cast(new_thread)->set_compiler(comp);
1004 }
1005
1006 // Note that we cannot call os::set_priority because it expects Java
1007 // priorities and we are *explicitly* using OS priorities so that it's
1008 // possible to set the compiler thread priority higher than any Java
1009 // thread.
1010
1011 int native_prio = CompilerThreadPriority;
1012 if (native_prio == -1) {
1013 if (UseCriticalCompilerThreadPriority) {
1014 native_prio = os::java_to_os_priority[CriticalPriority];
1015 } else {
1016 native_prio = os::java_to_os_priority[NearMaxPriority];
1017 }
1018 }
1019 os::set_native_priority(new_thread, native_prio);
1020
1021 // Note that this only sets the JavaThread _priority field, which by
1022 // definition is limited to Java priorities and not OS priorities.
1023 JavaThread::start_internal_daemon(THREAD, new_thread, thread_oop, NearMaxPriority);
1024
1025 } else { // osthread initialization failure
1026 if (UseDynamicNumberOfCompilerThreads && type == compiler_t
1027 && comp->num_compiler_threads() > 0) {
1028 // The new thread is not known to Thread-SMR yet so we can just delete.
1029 delete new_thread;
1030 return nullptr;
1031 } else {
1032 vm_exit_during_initialization("java.lang.OutOfMemoryError",
1033 os::native_thread_creation_failed_msg());
1034 }
1035 }
1036
1037 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
1038
1039 return new_thread;
1040 }
1041
1042 static bool trace_compiler_threads() {
1043 LogTarget(Debug, jit, thread) lt;
1044 return TraceCompilerThreads || lt.is_enabled();
1045 }
1046
1047 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1048 char name_buffer[256];
1049 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1050 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1051 return JNIHandles::make_global(thread_oop);
1052 }
1053
1054 static void print_compiler_threads(stringStream& msg) {
1055 if (TraceCompilerThreads) {
1056 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1057 }
1058 LogTarget(Debug, jit, thread) lt;
1059 if (lt.is_enabled()) {
1060 LogStream ls(lt);
1061 ls.print_cr("%s", msg.as_string());
1062 }
1063 }
1064
1065 static void print_compiler_thread(JavaThread *ct) {
1066 if (trace_compiler_threads()) {
1067 ResourceMark rm;
1068 ThreadsListHandle tlh; // name() depends on the TLH.
1069 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1070 stringStream msg;
1071 msg.print("Added initial compiler thread %s", ct->name());
1072 print_compiler_threads(msg);
1073 }
1074 }
1075
1076 void CompileBroker::init_compiler_threads() {
1077 // Ensure any exceptions lead to vm_exit_during_initialization.
1078 EXCEPTION_MARK;
1079 #if !defined(ZERO)
1080 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1081 #endif // !ZERO
1082 // Initialize the compilation queue
1083 if (_c2_count > 0) {
1084 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1085 _c2_compile_queue = new CompileQueue(name, MethodCompileQueueC2_lock);
1086 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1087 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1088 }
1089 if (_c1_count > 0) {
1090 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1091 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1092 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1093 }
1094
1095 if (_ac_count > 0) {
1096 if (_c1_count > 0) { // C1 is present
1097 _ac1_compile_queue = new CompileQueue("C1 AOT code compile queue", MethodCompileQueueSC1_lock);
1098 }
1099 if (_c2_count > 0) { // C2 is present
1100 _ac2_compile_queue = new CompileQueue("C2 AOT code compile queue", MethodCompileQueueSC2_lock);
1101 }
1102 _ac_objects = NEW_C_HEAP_ARRAY(jobject, _ac_count, mtCompiler);
1103 _ac_logs = NEW_C_HEAP_ARRAY(CompileLog*, _ac_count, mtCompiler);
1104 }
1105 char name_buffer[256];
1106
1107 for (int i = 0; i < _c2_count; i++) {
1108 // Create a name for our thread.
1109 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1110 _compiler2_objects[i] = thread_handle;
1111 _compiler2_logs[i] = nullptr;
1112
1113 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1114 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1115 assert(ct != nullptr, "should have been handled for initial thread");
1116 _compilers[1]->set_num_compiler_threads(i + 1);
1117 print_compiler_thread(ct);
1118 }
1119 }
1120
1121 for (int i = 0; i < _c1_count; i++) {
1122 // Create a name for our thread.
1123 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1124 _compiler1_objects[i] = thread_handle;
1125 _compiler1_logs[i] = nullptr;
1126
1127 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1128 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1129 assert(ct != nullptr, "should have been handled for initial thread");
1130 _compilers[0]->set_num_compiler_threads(i + 1);
1131 print_compiler_thread(ct);
1132 }
1133 }
1134
1135 if (_ac_count > 0) {
1136 int i = 0;
1137 if (_c1_count > 0) { // C1 is present
1138 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 1);
1139 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1140 jobject thread_handle = JNIHandles::make_global(thread_oop);
1141 _ac_objects[i] = thread_handle;
1142 _ac_logs[i] = nullptr;
1143 i++;
1144
1145 JavaThread *ct = make_thread(compiler_t, thread_handle, _ac1_compile_queue, _compilers[0], THREAD);
1146 assert(ct != nullptr, "should have been handled for initial thread");
1147 print_compiler_thread(ct);
1148 }
1149 if (_c2_count > 0) { // C2 is present
1150 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 2);
1151 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1152 jobject thread_handle = JNIHandles::make_global(thread_oop);
1153 _ac_objects[i] = thread_handle;
1154 _ac_logs[i] = nullptr;
1155
1156 JavaThread *ct = make_thread(compiler_t, thread_handle, _ac2_compile_queue, _compilers[1], THREAD);
1157 assert(ct != nullptr, "should have been handled for initial thread");
1158 print_compiler_thread(ct);
1159 }
1160 }
1161
1162 if (UsePerfData) {
1163 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
1164 }
1165
1166 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1167 if (DeoptimizeObjectsALot) {
1168 // Initialize and start the object deoptimizer threads
1169 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1170 for (int count = 0; count < total_count; count++) {
1171 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1172 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1173 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1174 }
1175 }
1176 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1177 }
1178
1179 void CompileBroker::init_training_replay() {
1180 // Ensure any exceptions lead to vm_exit_during_initialization.
1181 EXCEPTION_MARK;
1182 if (TrainingData::have_data()) {
1183 Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1184 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1185 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1186 }
1187 }
1188
1189 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1190
1191 int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1192 const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1193
1194 // Quick check if we already have enough compiler threads without taking the lock.
1195 // Numbers may change concurrently, so we read them again after we have the lock.
1196 if (_c2_compile_queue != nullptr) {
1197 old_c2_count = get_c2_thread_count();
1198 new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1199 }
1200 if (_c1_compile_queue != nullptr) {
1201 old_c1_count = get_c1_thread_count();
1202 new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1203 }
1204 if (new_c2_count <= old_c2_count && new_c1_count <= old_c1_count) return;
1205
1206 // Now, we do the more expensive operations.
1207 size_t free_memory = 0;
1208 // Return value ignored - defaulting to 0 on failure.
1209 (void)os::free_memory(free_memory);
1210 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
1211 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
1212 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
1213
1214 // Only attempt to start additional threads if the lock is free.
1215 if (!CompileThread_lock->try_lock()) return;
1216
1217 if (_c2_compile_queue != nullptr) {
1218 old_c2_count = get_c2_thread_count();
1219 new_c2_count = MIN4(_c2_count,
1220 _c2_compile_queue->size() / c2_tasks_per_thread,
1221 (int)(free_memory / (200*M)),
1222 (int)(available_cc_np / (128*K)));
1223
1224 for (int i = old_c2_count; i < new_c2_count; i++) {
1225 #if INCLUDE_JVMCI
1226 if (UseJVMCICompiler && !UseJVMCINativeLibrary && _compiler2_objects[i] == nullptr) {
1227 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread objects as their
1228 // existence is completely hidden from the rest of the VM (and those compiler threads can't
1229 // call Java code to do the creation anyway).
1230 //
1231 // For pure Java JVMCI we have to create new j.l.Thread objects as they are visible and we
1232 // can see unexpected thread lifecycle transitions if we bind them to new JavaThreads. For
1233 // native library JVMCI it's preferred to use the C1/C2 strategy as this avoids unnecessary
1234 // coupling with Java.
1235 if (!THREAD->can_call_java()) break;
1236 char name_buffer[256];
1237 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", _compilers[1]->name(), i);
1238 Handle thread_oop;
1239 {
1240 // We have to give up the lock temporarily for the Java calls.
1241 MutexUnlocker mu(CompileThread_lock);
1242 thread_oop = JavaThread::create_system_thread_object(name_buffer, THREAD);
1243 }
1244 if (HAS_PENDING_EXCEPTION) {
1245 if (trace_compiler_threads()) {
1246 ResourceMark rm;
1247 stringStream msg;
1248 msg.print_cr("JVMCI compiler thread creation failed:");
1249 PENDING_EXCEPTION->print_on(&msg);
1250 print_compiler_threads(msg);
1251 }
1252 CLEAR_PENDING_EXCEPTION;
1253 break;
1254 }
1255 // Check if another thread has beaten us during the Java calls.
1256 if (get_c2_thread_count() != i) break;
1257 jobject thread_handle = JNIHandles::make_global(thread_oop);
1258 assert(compiler2_object(i) == nullptr, "Old one must be released!");
1259 _compiler2_objects[i] = thread_handle;
1260 }
1261 #endif
1262 guarantee(compiler2_object(i) != nullptr, "Thread oop must exist");
1263 JavaThread *ct = make_thread(compiler_t, compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD);
1264 if (ct == nullptr) break;
1265 _compilers[1]->set_num_compiler_threads(i + 1);
1266 if (trace_compiler_threads()) {
1267 ResourceMark rm;
1268 ThreadsListHandle tlh; // name() depends on the TLH.
1269 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1270 stringStream msg;
1271 msg.print("Added compiler thread %s (free memory: %dMB, available non-profiled code cache: %dMB)",
1272 ct->name(), (int)(free_memory/M), (int)(available_cc_np/M));
1273 print_compiler_threads(msg);
1274 }
1275 }
1276 }
1277
1278 if (_c1_compile_queue != nullptr) {
1279 old_c1_count = get_c1_thread_count();
1280 new_c1_count = MIN4(_c1_count,
1281 _c1_compile_queue->size() / c1_tasks_per_thread,
1282 (int)(free_memory / (100*M)),
1283 (int)(available_cc_p / (128*K)));
1284
1285 for (int i = old_c1_count; i < new_c1_count; i++) {
1286 JavaThread *ct = make_thread(compiler_t, compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD);
1287 if (ct == nullptr) break;
1288 _compilers[0]->set_num_compiler_threads(i + 1);
1289 if (trace_compiler_threads()) {
1290 ResourceMark rm;
1291 ThreadsListHandle tlh; // name() depends on the TLH.
1292 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1293 stringStream msg;
1294 msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1295 ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1296 print_compiler_threads(msg);
1297 }
1298 }
1299 }
1300
1301 CompileThread_lock->unlock();
1302 }
1303
1304
1305 /**
1306 * Set the methods on the stack as on_stack so that redefine classes doesn't
1307 * reclaim them. This method is executed at a safepoint.
1308 */
1309 void CompileBroker::mark_on_stack() {
1310 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1311 // Since we are at a safepoint, we do not need a lock to access
1312 // the compile queues.
1313 if (_c2_compile_queue != nullptr) {
1314 _c2_compile_queue->mark_on_stack();
1315 }
1316 if (_c1_compile_queue != nullptr) {
1317 _c1_compile_queue->mark_on_stack();
1318 }
1319 if (_ac1_compile_queue != nullptr) {
1320 _ac1_compile_queue->mark_on_stack();
1321 }
1322 if (_ac2_compile_queue != nullptr) {
1323 _ac2_compile_queue->mark_on_stack();
1324 }
1325 }
1326
1327 // ------------------------------------------------------------------
1328 // CompileBroker::compile_method
1329 //
1330 // Request compilation of a method.
1331 void CompileBroker::compile_method_base(const methodHandle& method,
1332 int osr_bci,
1333 int comp_level,
1334 int hot_count,
1335 CompileTask::CompileReason compile_reason,
1336 bool requires_online_compilation,
1337 bool blocking,
1338 Thread* thread) {
1339 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1340 assert(method->method_holder()->is_instance_klass(),
1341 "sanity check");
1342 assert(!method->method_holder()->is_not_initialized() ||
1343 compile_reason == CompileTask::Reason_Preload ||
1344 compile_reason == CompileTask::Reason_Precompile ||
1345 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1346 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1347
1348 if (CIPrintRequests) {
1349 tty->print("request: ");
1350 method->print_short_name(tty);
1351 if (osr_bci != InvocationEntryBci) {
1352 tty->print(" osr_bci: %d", osr_bci);
1353 }
1354 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1355 if (hot_count > 0) {
1356 tty->print(" hot: yes");
1357 }
1358 tty->cr();
1359 }
1360
1361 // A request has been made for compilation. Before we do any
1362 // real work, check to see if the method has been compiled
1363 // in the meantime with a definitive result.
1364 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1365 return;
1366 }
1367
1368 #ifndef PRODUCT
1369 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1370 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1371 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1372 return;
1373 }
1374 }
1375 #endif
1376
1377 // If this method is already in the compile queue, then
1378 // we do not block the current thread.
1379 if (compilation_is_in_queue(method)) {
1380 // We may want to decay our counter a bit here to prevent
1381 // multiple denied requests for compilation. This is an
1382 // open compilation policy issue. Note: The other possibility,
1383 // in the case that this is a blocking compile request, is to have
1384 // all subsequent blocking requesters wait for completion of
1385 // ongoing compiles. Note that in this case we'll need a protocol
1386 // for freeing the associated compile tasks. [Or we could have
1387 // a single static monitor on which all these waiters sleep.]
1388 return;
1389 }
1390
1391 // Tiered policy requires MethodCounters to exist before adding a method to
1392 // the queue. Create if we don't have them yet.
1393 if (compile_reason != CompileTask::Reason_Preload) {
1394 method->get_method_counters(thread);
1395 }
1396
1397 AOTCodeEntry* aot_code_entry = find_aot_code_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1398 bool is_aot = (aot_code_entry != nullptr);
1399
1400 // Outputs from the following MutexLocker block:
1401 CompileTask* task = nullptr;
1402 CompileQueue* queue = compile_queue(comp_level, is_aot);
1403
1404 // Acquire our lock.
1405 {
1406 ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1407
1408 // Make sure the method has not slipped into the queues since
1409 // last we checked; note that those checks were "fast bail-outs".
1410 // Here we need to be more careful, see 14012000 below.
1411 if (compilation_is_in_queue(method)) {
1412 return;
1413 }
1414
1415 // We need to check again to see if the compilation has
1416 // completed. A previous compilation may have registered
1417 // some result.
1418 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1419 return;
1420 }
1421
1422 // We now know that this compilation is not pending, complete,
1423 // or prohibited. Assign a compile_id to this compilation
1424 // and check to see if it is in our [Start..Stop) range.
1425 int compile_id = assign_compile_id(method, osr_bci);
1426 if (compile_id == 0) {
1427 // The compilation falls outside the allowed range.
1428 return;
1429 }
1430
1431 #if INCLUDE_JVMCI
1432 if (UseJVMCICompiler && blocking) {
1433 // Don't allow blocking compiles for requests triggered by JVMCI.
1434 if (thread->is_Compiler_thread()) {
1435 blocking = false;
1436 }
1437
1438 // In libjvmci, JVMCI initialization should not deadlock with other threads
1439 if (!UseJVMCINativeLibrary) {
1440 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1441 vframeStream vfst(JavaThread::cast(thread));
1442 for (; !vfst.at_end(); vfst.next()) {
1443 if (vfst.method()->is_static_initializer() ||
1444 (vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass()) &&
1445 vfst.method()->name() == vmSymbols::loadClass_name())) {
1446 blocking = false;
1447 break;
1448 }
1449 }
1450
1451 // Don't allow blocking compilation requests to JVMCI
1452 // if JVMCI itself is not yet initialized
1453 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1454 blocking = false;
1455 }
1456 }
1457
1458 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1459 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1460 // such as the DestroyJavaVM thread.
1461 if (JVMCI::in_shutdown()) {
1462 blocking = false;
1463 }
1464 }
1465 #endif // INCLUDE_JVMCI
1466
1467 // We will enter the compilation in the queue.
1468 // 14012000: Note that this sets the queued_for_compile bits in
1469 // the target method. We can now reason that a method cannot be
1470 // queued for compilation more than once, as follows:
1471 // Before a thread queues a task for compilation, it first acquires
1472 // the compile queue lock, then checks if the method's queued bits
1473 // are set or it has already been compiled. Thus there can not be two
1474 // instances of a compilation task for the same method on the
1475 // compilation queue. Consider now the case where the compilation
1476 // thread has already removed a task for that method from the queue
1477 // and is in the midst of compiling it. In this case, the
1478 // queued_for_compile bits must be set in the method (and these
1479 // will be visible to the current thread, since the bits were set
1480 // under protection of the compile queue lock, which we hold now.
1481 // When the compilation completes, the compiler thread first sets
1482 // the compilation result and then clears the queued_for_compile
1483 // bits. Neither of these actions are protected by a barrier (or done
1484 // under the protection of a lock), so the only guarantee we have
1485 // (on machines with TSO (Total Store Order)) is that these values
1486 // will update in that order. As a result, the only combinations of
1487 // these bits that the current thread will see are, in temporal order:
1488 // <RESULT, QUEUE> :
1489 // <0, 1> : in compile queue, but not yet compiled
1490 // <1, 1> : compiled but queue bit not cleared
1491 // <1, 0> : compiled and queue bit cleared
1492 // Because we first check the queue bits then check the result bits,
1493 // we are assured that we cannot introduce a duplicate task.
1494 // Note that if we did the tests in the reverse order (i.e. check
1495 // result then check queued bit), we could get the result bit before
1496 // the compilation completed, and the queue bit after the compilation
1497 // completed, and end up introducing a "duplicate" (redundant) task.
1498 // In that case, the compiler thread should first check if a method
1499 // has already been compiled before trying to compile it.
1500 // NOTE: in the event that there are multiple compiler threads and
1501 // there is de-optimization/recompilation, things will get hairy,
1502 // and in that case it's best to protect both the testing (here) of
1503 // these bits, and their updating (here and elsewhere) under a
1504 // common lock.
1505 task = create_compile_task(queue,
1506 compile_id, method,
1507 osr_bci, comp_level,
1508 hot_count, aot_code_entry, compile_reason,
1509 requires_online_compilation, blocking);
1510
1511 if (task->is_aot_load() && (_ac_count > 0)) {
1512 // Put it on AOT code caching queue
1513 queue = is_c1_compile(comp_level) ? _ac1_compile_queue : _ac2_compile_queue;
1514 }
1515
1516 if (UseLockFreeCompileQueues) {
1517 assert(queue->lock()->owned_by_self() == false, "");
1518 queue->add_pending(task);
1519 } else {
1520 queue->add(task);
1521 }
1522 }
1523
1524 if (blocking) {
1525 wait_for_completion(task);
1526 }
1527 }
1528
1529 AOTCodeEntry* CompileBroker::find_aot_code_entry(const methodHandle& method, int osr_bci, int comp_level,
1530 CompileTask::CompileReason compile_reason,
1531 bool requires_online_compilation) {
1532 if (requires_online_compilation || compile_reason == CompileTask::Reason_Whitebox) {
1533 return nullptr; // Need normal JIT compilation
1534 }
1535 AOTCodeEntry* aot_code_entry = nullptr;
1536 if (osr_bci == InvocationEntryBci && AOTCodeCache::is_using_code()) {
1537 // Check for AOT preload code first.
1538 if (compile_reason == CompileTask::Reason_Preload) {
1539 aot_code_entry = method->aot_code_entry();
1540 assert(aot_code_entry != nullptr && aot_code_entry->for_preload(), "sanity");
1541 } else {
1542 aot_code_entry = AOTCodeCache::find_code_entry(method, comp_level);
1543 }
1544 }
1545 return aot_code_entry;
1546 }
1547
1548 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1549 int comp_level,
1550 int hot_count,
1551 bool requires_online_compilation,
1552 CompileTask::CompileReason compile_reason,
1553 TRAPS) {
1554 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1555 if (!_initialized || comp_level == CompLevel_none) {
1556 return nullptr;
1557 }
1558
1559 #if INCLUDE_JVMCI
1560 if (EnableJVMCI && UseJVMCICompiler &&
1561 comp_level == CompLevel_full_optimization && !AOTLinkedClassBulkLoader::class_preloading_finished()) {
1562 return nullptr;
1563 }
1564 #endif
1565
1566 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1567 assert(comp != nullptr, "Ensure we have a compiler");
1568
1569 #if INCLUDE_JVMCI
1570 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1571 // JVMCI compilation is not yet initializable.
1572 return nullptr;
1573 }
1574 #endif
1575
1576 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1577 // CompileBroker::compile_method can trap and can have pending async exception.
1578 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1579 DirectivesStack::release(directive);
1580 return nm;
1581 }
1582
1583 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1584 int comp_level,
1585 int hot_count,
1586 bool requires_online_compilation,
1587 CompileTask::CompileReason compile_reason,
1588 DirectiveSet* directive,
1589 TRAPS) {
1590
1591 // make sure arguments make sense
1592 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1593 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1594 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1595 assert(!method->method_holder()->is_not_initialized() ||
1596 compile_reason == CompileTask::Reason_Preload ||
1597 compile_reason == CompileTask::Reason_Precompile ||
1598 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1599 // return quickly if possible
1600 bool aot_compilation = (PrecompileCode && PrecompileOnlyAndExit) ||
1601 CDSConfig::is_dumping_aot_code();
1602 if (aot_compilation && !CompileTask::reason_is_precompile(compile_reason)) {
1603 // Skip normal compilations when compiling AOT code
1604 return nullptr;
1605 }
1606
1607 // lock, make sure that the compilation
1608 // isn't prohibited in a straightforward way.
1609 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1610 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1611 return nullptr;
1612 }
1613
1614 if (osr_bci == InvocationEntryBci) {
1615 // standard compilation
1616 nmethod* method_code = method->code();
1617 if (method_code != nullptr) {
1618 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1619 return method_code;
1620 }
1621 }
1622 if (method->is_not_compilable(comp_level)) {
1623 return nullptr;
1624 }
1625 } else {
1626 // osr compilation
1627 // We accept a higher level osr method
1628 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1629 if (nm != nullptr) return nm;
1630 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1631 }
1632
1633 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1634 // some prerequisites that are compiler specific
1635 if (compile_reason != CompileTask::Reason_Preload &&
1636 !CompileTask::reason_is_precompile(compile_reason) &&
1637 (comp->is_c2() || comp->is_jvmci())) {
1638 InternalOOMEMark iom(THREAD);
1639 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1640 // Resolve all classes seen in the signature of the method
1641 // we are compiling.
1642 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1643 }
1644
1645 // If the method is native, do the lookup in the thread requesting
1646 // the compilation. Native lookups can load code, which is not
1647 // permitted during compilation.
1648 //
1649 // Note: A native method implies non-osr compilation which is
1650 // checked with an assertion at the entry of this method.
1651 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1652 address adr = NativeLookup::lookup(method, THREAD);
1653 if (HAS_PENDING_EXCEPTION) {
1654 // In case of an exception looking up the method, we just forget
1655 // about it. The interpreter will kick-in and throw the exception.
1656 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1657 CLEAR_PENDING_EXCEPTION;
1658 return nullptr;
1659 }
1660 assert(method->has_native_function(), "must have native code by now");
1661 }
1662
1663 // RedefineClasses() has replaced this method; just return
1664 if (method->is_old()) {
1665 return nullptr;
1666 }
1667
1668 // JVMTI -- post_compile_event requires jmethod_id() that may require
1669 // a lock the compiling thread can not acquire. Prefetch it here.
1670 if (JvmtiExport::should_post_compiled_method_load()) {
1671 method->jmethod_id();
1672 }
1673
1674 // do the compilation
1675 if (method->is_native()) {
1676 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1677 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1678 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1679 //
1680 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1681 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1682 AdapterHandlerLibrary::create_native_wrapper(method);
1683 } else {
1684 return nullptr;
1685 }
1686 } else {
1687 // If the compiler is shut off due to code cache getting full
1688 // fail out now so blocking compiles dont hang the java thread
1689 if (!should_compile_new_jobs()) {
1690 return nullptr;
1691 }
1692 bool is_blocking = ReplayCompiles ||
1693 !directive->BackgroundCompilationOption ||
1694 (PreloadBlocking && (compile_reason == CompileTask::Reason_Preload));
1695 compile_method_base(method, osr_bci, comp_level, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1696 }
1697
1698 // return requested nmethod
1699 // We accept a higher level osr method
1700 if (osr_bci == InvocationEntryBci) {
1701 return method->code();
1702 }
1703 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1704 }
1705
1706
1707 // ------------------------------------------------------------------
1708 // CompileBroker::compilation_is_complete
1709 //
1710 // See if compilation of this method is already complete.
1711 bool CompileBroker::compilation_is_complete(Method* method,
1712 int osr_bci,
1713 int comp_level,
1714 bool online_only,
1715 CompileTask::CompileReason compile_reason) {
1716 if (compile_reason == CompileTask::Reason_Precompile ||
1717 compile_reason == CompileTask::Reason_PrecompileForPreload) {
1718 return false; // FIXME: any restrictions?
1719 }
1720 bool is_osr = (osr_bci != standard_entry_bci);
1721 if (is_osr) {
1722 if (method->is_not_osr_compilable(comp_level)) {
1723 return true;
1724 } else {
1725 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1726 return (result != nullptr);
1727 }
1728 } else {
1729 if (method->is_not_compilable(comp_level)) {
1730 return true;
1731 } else {
1732 nmethod* result = method->code();
1733 if (result == nullptr) {
1734 return false;
1735 }
1736 if (online_only && result->is_aot()) {
1737 return false;
1738 }
1739 bool same_level = (comp_level == result->comp_level());
1740 if (result->has_clinit_barriers()) {
1741 return !same_level; // Allow replace preloaded code with new code of the same level
1742 }
1743 return same_level;
1744 }
1745 }
1746 }
1747
1748
1749 /**
1750 * See if this compilation is already requested.
1751 *
1752 * Implementation note: there is only a single "is in queue" bit
1753 * for each method. This means that the check below is overly
1754 * conservative in the sense that an osr compilation in the queue
1755 * will block a normal compilation from entering the queue (and vice
1756 * versa). This can be remedied by a full queue search to disambiguate
1757 * cases. If it is deemed profitable, this may be done.
1758 */
1759 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1760 return method->queued_for_compilation();
1761 }
1762
1763 // ------------------------------------------------------------------
1764 // CompileBroker::compilation_is_prohibited
1765 //
1766 // See if this compilation is not allowed.
1767 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1768 bool is_native = method->is_native();
1769 // Some compilers may not support the compilation of natives.
1770 AbstractCompiler *comp = compiler(comp_level);
1771 if (is_native && (!CICompileNatives || comp == nullptr)) {
1772 method->set_not_compilable_quietly("native methods not supported", comp_level);
1773 return true;
1774 }
1775
1776 bool is_osr = (osr_bci != standard_entry_bci);
1777 // Some compilers may not support on stack replacement.
1778 if (is_osr && (!CICompileOSR || comp == nullptr)) {
1779 method->set_not_osr_compilable("OSR not supported", comp_level);
1780 return true;
1781 }
1782
1783 // The method may be explicitly excluded by the user.
1784 double scale;
1785 if (excluded || (CompilerOracle::has_option_value(method, CompileCommandEnum::CompileThresholdScaling, scale) && scale == 0)) {
1786 bool quietly = CompilerOracle::be_quiet();
1787 if (PrintCompilation && !quietly) {
1788 // This does not happen quietly...
1789 ResourceMark rm;
1790 tty->print("### Excluding %s:%s",
1791 method->is_native() ? "generation of native wrapper" : "compile",
1792 (method->is_static() ? " static" : ""));
1793 method->print_short_name(tty);
1794 tty->cr();
1795 }
1796 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1797 }
1798
1799 return false;
1800 }
1801
1802 /**
1803 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1804 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1805 * The function also allows to generate separate compilation IDs for OSR compilations.
1806 */
1807 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1808 #ifdef ASSERT
1809 bool is_osr = (osr_bci != standard_entry_bci);
1810 int id;
1811 if (method->is_native()) {
1812 assert(!is_osr, "can't be osr");
1813 // Adapters, native wrappers and method handle intrinsics
1814 // should be generated always.
1815 return Atomic::add(CICountNative ? &_native_compilation_id : &_compilation_id, 1);
1816 } else if (CICountOSR && is_osr) {
1817 id = Atomic::add(&_osr_compilation_id, 1);
1818 if (CIStartOSR <= id && id < CIStopOSR) {
1819 return id;
1820 }
1821 } else {
1822 id = Atomic::add(&_compilation_id, 1);
1823 if (CIStart <= id && id < CIStop) {
1824 return id;
1825 }
1826 }
1827
1828 // Method was not in the appropriate compilation range.
1829 method->set_not_compilable_quietly("Not in requested compile id range");
1830 return 0;
1831 #else
1832 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1833 // only _compilation_id is incremented.
1834 return Atomic::add(&_compilation_id, 1);
1835 #endif
1836 }
1837
1838 // ------------------------------------------------------------------
1839 // CompileBroker::assign_compile_id_unlocked
1840 //
1841 // Public wrapper for assign_compile_id that acquires the needed locks
1842 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1843 return assign_compile_id(method, osr_bci);
1844 }
1845
1846 // ------------------------------------------------------------------
1847 // CompileBroker::create_compile_task
1848 //
1849 // Create a CompileTask object representing the current request for
1850 // compilation. Add this task to the queue.
1851 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1852 int compile_id,
1853 const methodHandle& method,
1854 int osr_bci,
1855 int comp_level,
1856 int hot_count,
1857 AOTCodeEntry* aot_code_entry,
1858 CompileTask::CompileReason compile_reason,
1859 bool requires_online_compilation,
1860 bool blocking) {
1861 CompileTask* new_task = new CompileTask(compile_id, method, osr_bci, comp_level,
1862 hot_count, aot_code_entry, compile_reason, queue,
1863 requires_online_compilation, blocking);
1864 return new_task;
1865 }
1866
1867 #if INCLUDE_JVMCI
1868 // The number of milliseconds to wait before checking if
1869 // JVMCI compilation has made progress.
1870 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1871
1872 // The number of JVMCI compilation progress checks that must fail
1873 // before unblocking a thread waiting for a blocking compilation.
1874 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1875
1876 /**
1877 * Waits for a JVMCI compiler to complete a given task. This thread
1878 * waits until either the task completes or it sees no JVMCI compilation
1879 * progress for N consecutive milliseconds where N is
1880 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1881 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1882 *
1883 * @return true if this thread needs to delete the task
1884 */
1885 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1886 assert(UseJVMCICompiler, "sanity");
1887 MonitorLocker ml(thread, CompileTaskWait_lock);
1888 int progress_wait_attempts = 0;
1889 jint thread_jvmci_compilation_ticks = 0;
1890 jint global_jvmci_compilation_ticks = jvmci->global_compilation_ticks();
1891 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1892 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1893 JVMCICompileState* jvmci_compile_state = task->blocking_jvmci_compile_state();
1894
1895 bool progress;
1896 if (jvmci_compile_state != nullptr) {
1897 jint ticks = jvmci_compile_state->compilation_ticks();
1898 progress = (ticks - thread_jvmci_compilation_ticks) != 0;
1899 JVMCI_event_1("waiting on compilation %d [ticks=%d]", task->compile_id(), ticks);
1900 thread_jvmci_compilation_ticks = ticks;
1901 } else {
1902 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1903 // that all JVMCI compiler threads are blocked on. We use the global JVMCI
1904 // compilation ticks to determine whether JVMCI compilation
1905 // is still making progress through the JVMCI compiler queue.
1906 jint ticks = jvmci->global_compilation_ticks();
1907 progress = (ticks - global_jvmci_compilation_ticks) != 0;
1908 JVMCI_event_1("waiting on compilation %d to be queued [ticks=%d]", task->compile_id(), ticks);
1909 global_jvmci_compilation_ticks = ticks;
1910 }
1911
1912 if (!progress) {
1913 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1914 if (PrintCompilation) {
1915 task->print(tty, "wait for blocking compilation timed out");
1916 }
1917 JVMCI_event_1("waiting on compilation %d timed out", task->compile_id());
1918 break;
1919 }
1920 } else {
1921 progress_wait_attempts = 0;
1922 }
1923 }
1924 task->clear_waiter();
1925 return task->is_complete();
1926 }
1927 #endif
1928
1929 /**
1930 * Wait for the compilation task to complete.
1931 */
1932 void CompileBroker::wait_for_completion(CompileTask* task) {
1933 if (CIPrintCompileQueue) {
1934 ttyLocker ttyl;
1935 tty->print_cr("BLOCKING FOR COMPILE");
1936 }
1937
1938 assert(task->is_blocking(), "can only wait on blocking task");
1939
1940 JavaThread* thread = JavaThread::current();
1941
1942 methodHandle method(thread, task->method());
1943 bool free_task;
1944 #if INCLUDE_JVMCI
1945 AbstractCompiler* comp = compiler(task->comp_level());
1946 if (!UseJVMCINativeLibrary && comp->is_jvmci() && !task->should_wait_for_compilation()) {
1947 // It may return before compilation is completed.
1948 // Note that libjvmci should not pre-emptively unblock
1949 // a thread waiting for a compilation as it does not call
1950 // Java code and so is not deadlock prone like jarjvmci.
1951 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1952 } else
1953 #endif
1954 {
1955 free_task = true;
1956 // Wait until the task is complete or compilation is shut down.
1957 MonitorLocker ml(thread, CompileTaskWait_lock);
1958 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1959 ml.wait();
1960 }
1961 }
1962
1963 // It is harmless to check this status without the lock, because
1964 // completion is a stable property.
1965 if (!task->is_complete()) {
1966 // Task is not complete, likely because we are exiting for compilation
1967 // shutdown. The task can still be reached through the queue, or executed
1968 // by some compiler thread. There is no coordination with either MCQ lock
1969 // holders or compilers, therefore we cannot delete the task.
1970 //
1971 // This will leave task allocated, which leaks it. At this (degraded) point,
1972 // it is less risky to abandon the task, rather than attempting a more
1973 // complicated deletion protocol.
1974 free_task = false;
1975 }
1976
1977 if (free_task) {
1978 assert(task->is_complete(), "Compilation should have completed");
1979 assert(task->next() == nullptr && task->prev() == nullptr,
1980 "Completed task should not be in the queue");
1981
1982 // By convention, the waiter is responsible for deleting a
1983 // blocking CompileTask. Since there is only one waiter ever
1984 // waiting on a CompileTask, we know that no one else will
1985 // be using this CompileTask; we can delete it.
1986 delete task;
1987 }
1988 }
1989
1990 void CompileBroker::wait_for_no_active_tasks() {
1991 CompileTask::wait_for_no_active_tasks();
1992 }
1993
1994 /**
1995 * Initialize compiler thread(s) + compiler object(s). The postcondition
1996 * of this function is that the compiler runtimes are initialized and that
1997 * compiler threads can start compiling.
1998 */
1999 bool CompileBroker::init_compiler_runtime() {
2000 CompilerThread* thread = CompilerThread::current();
2001 AbstractCompiler* comp = thread->compiler();
2002 // Final sanity check - the compiler object must exist
2003 guarantee(comp != nullptr, "Compiler object must exist");
2004
2005 {
2006 // Must switch to native to allocate ci_env
2007 ThreadToNativeFromVM ttn(thread);
2008 ciEnv ci_env((CompileTask*)nullptr);
2009 // Cache Jvmti state
2010 ci_env.cache_jvmti_state();
2011 // Cache DTrace flags
2012 ci_env.cache_dtrace_flags();
2013
2014 // Switch back to VM state to do compiler initialization
2015 ThreadInVMfromNative tv(thread);
2016
2017 comp->initialize();
2018 }
2019
2020 if (comp->is_failed()) {
2021 disable_compilation_forever();
2022 // If compiler initialization failed, no compiler thread that is specific to a
2023 // particular compiler runtime will ever start to compile methods.
2024 shutdown_compiler_runtime(comp, thread);
2025 return false;
2026 }
2027
2028 // C1 specific check
2029 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2030 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2031 return false;
2032 }
2033
2034 return true;
2035 }
2036
2037 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2038 BufferBlob* blob = thread->get_buffer_blob();
2039 if (blob != nullptr) {
2040 blob->purge();
2041 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2042 CodeCache::free(blob);
2043 }
2044 }
2045
2046 /**
2047 * If C1 and/or C2 initialization failed, we shut down all compilation.
2048 * We do this to keep things simple. This can be changed if it ever turns
2049 * out to be a problem.
2050 */
2051 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2052 free_buffer_blob_if_allocated(thread);
2053
2054 log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2055
2056 if (comp->should_perform_shutdown()) {
2057 // There are two reasons for shutting down the compiler
2058 // 1) compiler runtime initialization failed
2059 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2060 warning("%s initialization failed. Shutting down all compilers", comp->name());
2061
2062 // Only one thread per compiler runtime object enters here
2063 // Set state to shut down
2064 comp->set_shut_down();
2065
2066 // Delete all queued compilation tasks to make compiler threads exit faster.
2067 if (_c1_compile_queue != nullptr) {
2068 _c1_compile_queue->delete_all();
2069 }
2070
2071 if (_c2_compile_queue != nullptr) {
2072 _c2_compile_queue->delete_all();
2073 }
2074
2075 // Set flags so that we continue execution with using interpreter only.
2076 UseCompiler = false;
2077 UseInterpreter = true;
2078
2079 // We could delete compiler runtimes also. However, there are references to
2080 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
2081 // fail. This can be done later if necessary.
2082 }
2083 }
2084
2085 /**
2086 * Helper function to create new or reuse old CompileLog.
2087 */
2088 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2089 if (!LogCompilation) return nullptr;
2090
2091 AbstractCompiler *compiler = ct->compiler();
2092 bool c1 = compiler->is_c1();
2093 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
2094 assert(compiler_objects != nullptr, "must be initialized at this point");
2095 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
2096 assert(logs != nullptr, "must be initialized at this point");
2097 int count = c1 ? _c1_count : _c2_count;
2098
2099 if (ct->queue() == _ac1_compile_queue || ct->queue() == _ac2_compile_queue) {
2100 compiler_objects = _ac_objects;
2101 logs = _ac_logs;
2102 count = _ac_count;
2103 }
2104 // Find Compiler number by its threadObj.
2105 oop compiler_obj = ct->threadObj();
2106 int compiler_number = 0;
2107 bool found = false;
2108 for (; compiler_number < count; compiler_number++) {
2109 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2110 found = true;
2111 break;
2112 }
2113 }
2114 assert(found, "Compiler must exist at this point");
2115
2116 // Determine pointer for this thread's log.
2117 CompileLog** log_ptr = &logs[compiler_number];
2118
2119 // Return old one if it exists.
2120 CompileLog* log = *log_ptr;
2121 if (log != nullptr) {
2122 ct->init_log(log);
2123 return log;
2124 }
2125
2126 // Create a new one and remember it.
2127 init_compiler_thread_log();
2128 log = ct->log();
2129 *log_ptr = log;
2130 return log;
2131 }
2132
2133 // ------------------------------------------------------------------
2134 // CompileBroker::compiler_thread_loop
2135 //
2136 // The main loop run by a CompilerThread.
2137 void CompileBroker::compiler_thread_loop() {
2138 CompilerThread* thread = CompilerThread::current();
2139 CompileQueue* queue = thread->queue();
2140 // For the thread that initializes the ciObjectFactory
2141 // this resource mark holds all the shared objects
2142 ResourceMark rm;
2143
2144 // First thread to get here will initialize the compiler interface
2145
2146 {
2147 ASSERT_IN_VM;
2148 MutexLocker only_one (thread, CompileThread_lock);
2149 if (!ciObjectFactory::is_initialized()) {
2150 ciObjectFactory::initialize();
2151 }
2152 }
2153
2154 // Open a log.
2155 CompileLog* log = get_log(thread);
2156 if (log != nullptr) {
2157 log->begin_elem("start_compile_thread name='%s' thread='%zu' process='%d'",
2158 thread->name(),
2159 os::current_thread_id(),
2160 os::current_process_id());
2161 log->stamp();
2162 log->end_elem();
2163 }
2164
2165 if (!thread->init_compilation_timeout()) {
2166 return;
2167 }
2168
2169 // If compiler thread/runtime initialization fails, exit the compiler thread
2170 if (!init_compiler_runtime()) {
2171 return;
2172 }
2173
2174 thread->start_idle_timer();
2175
2176 // Poll for new compilation tasks as long as the JVM runs. Compilation
2177 // should only be disabled if something went wrong while initializing the
2178 // compiler runtimes. This, in turn, should not happen. The only known case
2179 // when compiler runtime initialization fails is if there is not enough free
2180 // space in the code cache to generate the necessary stubs, etc.
2181 while (!is_compilation_disabled_forever()) {
2182 // We need this HandleMark to avoid leaking VM handles.
2183 HandleMark hm(thread);
2184
2185 RecompilationPolicy::recompilation_step(AOTRecompilationWorkUnitSize, thread);
2186
2187 CompileTask* task = queue->get(thread);
2188 if (task == nullptr) {
2189 if (UseDynamicNumberOfCompilerThreads) {
2190 // Access compiler_count under lock to enforce consistency.
2191 MutexLocker only_one(CompileThread_lock);
2192 if (can_remove(thread, true)) {
2193 if (trace_compiler_threads()) {
2194 ResourceMark rm;
2195 stringStream msg;
2196 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2197 thread->name(), thread->idle_time_millis());
2198 print_compiler_threads(msg);
2199 }
2200
2201 // Notify compiler that the compiler thread is about to stop
2202 thread->compiler()->stopping_compiler_thread(thread);
2203
2204 free_buffer_blob_if_allocated(thread);
2205 return; // Stop this thread.
2206 }
2207 }
2208 } else {
2209 // Assign the task to the current thread. Mark this compilation
2210 // thread as active for the profiler.
2211 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2212 // occurs after fetching the compile task off the queue.
2213 CompileTaskWrapper ctw(task);
2214 methodHandle method(thread, task->method());
2215
2216 // Never compile a method if breakpoints are present in it
2217 if (method()->number_of_breakpoints() == 0) {
2218 // Compile the method.
2219 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2220 invoke_compiler_on_method(task);
2221 thread->start_idle_timer();
2222 } else {
2223 // After compilation is disabled, remove remaining methods from queue
2224 method->clear_queued_for_compilation();
2225 method->set_pending_queue_processed(false);
2226 task->set_failure_reason("compilation is disabled");
2227 }
2228 } else {
2229 task->set_failure_reason("breakpoints are present");
2230 }
2231
2232 // Don't use AOT compielr threads for dynamic C1 and C2 threads creation.
2233 if (UseDynamicNumberOfCompilerThreads &&
2234 (queue == _c1_compile_queue || queue == _c2_compile_queue)) {
2235 possibly_add_compiler_threads(thread);
2236 assert(!thread->has_pending_exception(), "should have been handled");
2237 }
2238 }
2239 }
2240
2241 // Shut down compiler runtime
2242 shutdown_compiler_runtime(thread->compiler(), thread);
2243 }
2244
2245 // ------------------------------------------------------------------
2246 // CompileBroker::init_compiler_thread_log
2247 //
2248 // Set up state required by +LogCompilation.
2249 void CompileBroker::init_compiler_thread_log() {
2250 CompilerThread* thread = CompilerThread::current();
2251 char file_name[4*K];
2252 FILE* fp = nullptr;
2253 intx thread_id = os::current_thread_id();
2254 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
2255 const char* dir = (try_temp_dir ? os::get_temp_directory() : nullptr);
2256 if (dir == nullptr) {
2257 jio_snprintf(file_name, sizeof(file_name), "hs_c%zu_pid%u.log",
2258 thread_id, os::current_process_id());
2259 } else {
2260 jio_snprintf(file_name, sizeof(file_name),
2261 "%s%shs_c%zu_pid%u.log", dir,
2262 os::file_separator(), thread_id, os::current_process_id());
2263 }
2264
2265 fp = os::fopen(file_name, "wt");
2266 if (fp != nullptr) {
2267 if (LogCompilation && Verbose) {
2268 tty->print_cr("Opening compilation log %s", file_name);
2269 }
2270 CompileLog* log = new(mtCompiler) CompileLog(file_name, fp, thread_id);
2271 if (log == nullptr) {
2272 fclose(fp);
2273 return;
2274 }
2275 thread->init_log(log);
2276
2277 if (xtty != nullptr) {
2278 ttyLocker ttyl;
2279 // Record any per thread log files
2280 xtty->elem("thread_logfile thread='%zd' filename='%s'", thread_id, file_name);
2281 }
2282 return;
2283 }
2284 }
2285 warning("Cannot open log file: %s", file_name);
2286 }
2287
2288 void CompileBroker::log_metaspace_failure() {
2289 const char* message = "some methods may not be compiled because metaspace "
2290 "is out of memory";
2291 if (CompilationLog::log() != nullptr) {
2292 CompilationLog::log()->log_metaspace_failure(message);
2293 }
2294 if (PrintCompilation) {
2295 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
2296 }
2297 }
2298
2299
2300 // ------------------------------------------------------------------
2301 // CompileBroker::set_should_block
2302 //
2303 // Set _should_block.
2304 // Call this from the VM, with Threads_lock held and a safepoint requested.
2305 void CompileBroker::set_should_block() {
2306 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
2307 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
2308 #ifndef PRODUCT
2309 if (PrintCompilation && (Verbose || WizardMode))
2310 tty->print_cr("notifying compiler thread pool to block");
2311 #endif
2312 _should_block = true;
2313 }
2314
2315 // ------------------------------------------------------------------
2316 // CompileBroker::maybe_block
2317 //
2318 // Call this from the compiler at convenient points, to poll for _should_block.
2319 void CompileBroker::maybe_block() {
2320 if (_should_block) {
2321 #ifndef PRODUCT
2322 if (PrintCompilation && (Verbose || WizardMode))
2323 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
2324 #endif
2325 // If we are executing a task during the request to block, report the task
2326 // before disappearing.
2327 CompilerThread* thread = CompilerThread::current();
2328 if (thread != nullptr) {
2329 CompileTask* task = thread->task();
2330 if (task != nullptr) {
2331 if (PrintCompilation) {
2332 task->print(tty, "blocked");
2333 }
2334 task->print_ul("blocked");
2335 }
2336 }
2337 // Go to VM state and block for final VM shutdown safepoint.
2338 ThreadInVMfromNative tivfn(JavaThread::current());
2339 assert(false, "Should never unblock from TIVNM entry");
2340 }
2341 }
2342
2343 // wrapper for CodeCache::print_summary()
2344 static void codecache_print(bool detailed)
2345 {
2346 stringStream s;
2347 // Dump code cache into a buffer before locking the tty,
2348 {
2349 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2350 CodeCache::print_summary(&s, detailed);
2351 }
2352 ttyLocker ttyl;
2353 tty->print("%s", s.freeze());
2354 }
2355
2356 // wrapper for CodeCache::print_summary() using outputStream
2357 static void codecache_print(outputStream* out, bool detailed) {
2358 stringStream s;
2359
2360 // Dump code cache into a buffer
2361 {
2362 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2363 CodeCache::print_summary(&s, detailed);
2364 }
2365
2366 char* remaining_log = s.as_string();
2367 while (*remaining_log != '\0') {
2368 char* eol = strchr(remaining_log, '\n');
2369 if (eol == nullptr) {
2370 out->print_cr("%s", remaining_log);
2371 remaining_log = remaining_log + strlen(remaining_log);
2372 } else {
2373 *eol = '\0';
2374 out->print_cr("%s", remaining_log);
2375 remaining_log = eol + 1;
2376 }
2377 }
2378 }
2379
2380 void CompileBroker::handle_compile_error(CompilerThread* thread, CompileTask* task, ciEnv* ci_env,
2381 int compilable, const char* failure_reason) {
2382 if (!AbortVMOnCompilationFailure) {
2383 return;
2384 }
2385 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
2386 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
2387 }
2388 if (compilable == ciEnv::MethodCompilable_never) {
2389 fatal("Never compilable: %s", failure_reason);
2390 }
2391 }
2392
2393 static void post_compilation_event(EventCompilation& event, CompileTask* task) {
2394 assert(task != nullptr, "invariant");
2395 CompilerEvent::CompilationEvent::post(event,
2396 task->compile_id(),
2397 task->compiler()->type(),
2398 task->method(),
2399 task->comp_level(),
2400 task->is_success(),
2401 task->osr_bci() != CompileBroker::standard_entry_bci,
2402 task->nm_total_size(),
2403 task->num_inlined_bytecodes(),
2404 task->arena_bytes());
2405 }
2406
2407 int DirectivesStack::_depth = 0;
2408 CompilerDirectives* DirectivesStack::_top = nullptr;
2409 CompilerDirectives* DirectivesStack::_bottom = nullptr;
2410
2411 // Acquires Compilation_lock and waits for it to be notified
2412 // as long as WhiteBox::compilation_locked is true.
2413 static void whitebox_lock_compilation() {
2414 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2415 while (WhiteBox::compilation_locked) {
2416 locker.wait();
2417 }
2418 }
2419
2420 // ------------------------------------------------------------------
2421 // CompileBroker::invoke_compiler_on_method
2422 //
2423 // Compile a method.
2424 //
2425 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2426 task->print_ul();
2427 elapsedTimer time;
2428
2429 DirectiveSet* directive = task->directive();
2430
2431 CompilerThread* thread = CompilerThread::current();
2432 ResourceMark rm(thread);
2433
2434 if (CompilationLog::log() != nullptr) {
2435 CompilationLog::log()->log_compile(thread, task);
2436 }
2437
2438 // Common flags.
2439 int compile_id = task->compile_id();
2440 int osr_bci = task->osr_bci();
2441 bool is_osr = (osr_bci != standard_entry_bci);
2442 bool should_log = (thread->log() != nullptr);
2443 bool should_break = false;
2444 bool should_print_compilation = PrintCompilation || directive->PrintCompilationOption;
2445 const int task_level = task->comp_level();
2446 AbstractCompiler* comp = task->compiler();
2447 {
2448 // create the handle inside it's own block so it can't
2449 // accidentally be referenced once the thread transitions to
2450 // native. The NoHandleMark before the transition should catch
2451 // any cases where this occurs in the future.
2452 methodHandle method(thread, task->method());
2453
2454 assert(!method->is_native(), "no longer compile natives");
2455
2456 // Update compile information when using perfdata.
2457 if (UsePerfData) {
2458 update_compile_perf_data(thread, method, is_osr);
2459 }
2460
2461 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2462 }
2463
2464 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2465 if (should_log && !directive->LogOption) {
2466 should_log = false;
2467 }
2468
2469 // Allocate a new set of JNI handles.
2470 JNIHandleMark jhm(thread);
2471 Method* target_handle = task->method();
2472 int compilable = ciEnv::MethodCompilable;
2473 const char* failure_reason = nullptr;
2474 bool failure_reason_on_C_heap = false;
2475 const char* retry_message = nullptr;
2476
2477 #if INCLUDE_JVMCI
2478 if (UseJVMCICompiler && comp != nullptr && comp->is_jvmci()) {
2479 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2480
2481 TraceTime t1("compilation", &time);
2482 EventCompilation event;
2483 JVMCICompileState compile_state(task, jvmci);
2484 JVMCIRuntime *runtime = nullptr;
2485
2486 if (JVMCI::in_shutdown()) {
2487 failure_reason = "in JVMCI shutdown";
2488 retry_message = "not retryable";
2489 compilable = ciEnv::MethodCompilable_never;
2490 } else if (compile_state.target_method_is_old()) {
2491 // Skip redefined methods
2492 failure_reason = "redefined method";
2493 retry_message = "not retryable";
2494 compilable = ciEnv::MethodCompilable_never;
2495 } else {
2496 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2497 if (env.init_error() != JNI_OK) {
2498 const char* msg = env.init_error_msg();
2499 failure_reason = os::strdup(err_msg("Error attaching to libjvmci (err: %d, %s)",
2500 env.init_error(), msg == nullptr ? "unknown" : msg), mtJVMCI);
2501 bool reason_on_C_heap = true;
2502 // In case of JNI_ENOMEM, there's a good chance a subsequent attempt to create libjvmci or attach to it
2503 // might succeed. Other errors most likely indicate a non-recoverable error in the JVMCI runtime.
2504 bool retryable = env.init_error() == JNI_ENOMEM;
2505 compile_state.set_failure(retryable, failure_reason, reason_on_C_heap);
2506 }
2507 if (failure_reason == nullptr) {
2508 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2509 // Must switch to native to block
2510 ThreadToNativeFromVM ttn(thread);
2511 whitebox_lock_compilation();
2512 }
2513 methodHandle method(thread, target_handle);
2514 runtime = env.runtime();
2515 runtime->compile_method(&env, jvmci, method, osr_bci);
2516
2517 failure_reason = compile_state.failure_reason();
2518 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2519 if (!compile_state.retryable()) {
2520 retry_message = "not retryable";
2521 compilable = ciEnv::MethodCompilable_not_at_tier;
2522 }
2523 if (!task->is_success()) {
2524 assert(failure_reason != nullptr, "must specify failure_reason");
2525 }
2526 }
2527 }
2528 if (!task->is_success() && !JVMCI::in_shutdown()) {
2529 handle_compile_error(thread, task, nullptr, compilable, failure_reason);
2530 }
2531 if (event.should_commit()) {
2532 post_compilation_event(event, task);
2533 }
2534
2535 if (runtime != nullptr) {
2536 runtime->post_compile(thread);
2537 }
2538 } else
2539 #endif // INCLUDE_JVMCI
2540 {
2541 NoHandleMark nhm;
2542 ThreadToNativeFromVM ttn(thread);
2543
2544 ciEnv ci_env(task);
2545 if (should_break) {
2546 ci_env.set_break_at_compile(true);
2547 }
2548 if (should_log) {
2549 ci_env.set_log(thread->log());
2550 }
2551 assert(thread->env() == &ci_env, "set by ci_env");
2552 // The thread-env() field is cleared in ~CompileTaskWrapper.
2553
2554 // Cache Jvmti state
2555 bool method_is_old = ci_env.cache_jvmti_state();
2556
2557 // Skip redefined methods
2558 if (method_is_old) {
2559 ci_env.record_method_not_compilable("redefined method", true);
2560 }
2561
2562 // Cache DTrace flags
2563 ci_env.cache_dtrace_flags();
2564
2565 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2566
2567 TraceTime t1("compilation", &time);
2568 EventCompilation event;
2569
2570 if (comp == nullptr) {
2571 ci_env.record_method_not_compilable("no compiler");
2572 } else if (!ci_env.failing()) {
2573 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2574 whitebox_lock_compilation();
2575 }
2576 comp->compile_method(&ci_env, target, osr_bci, true, directive);
2577
2578 /* Repeat compilation without installing code for profiling purposes */
2579 int repeat_compilation_count = directive->RepeatCompilationOption;
2580 while (repeat_compilation_count > 0) {
2581 ResourceMark rm(thread);
2582 task->print_ul("NO CODE INSTALLED");
2583 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2584 repeat_compilation_count--;
2585 }
2586 }
2587
2588
2589 if (!ci_env.failing() && !task->is_success() && !task->is_precompile()) {
2590 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2591 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2592 // The compiler elected, without comment, not to register a result.
2593 // Do not attempt further compilations of this method.
2594 ci_env.record_method_not_compilable("compile failed");
2595 }
2596
2597 // Copy this bit to the enclosing block:
2598 compilable = ci_env.compilable();
2599
2600 if (ci_env.failing()) {
2601 // Duplicate the failure reason string, so that it outlives ciEnv
2602 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2603 failure_reason_on_C_heap = true;
2604 retry_message = ci_env.retry_message();
2605 ci_env.report_failure(failure_reason);
2606 }
2607
2608 if (ci_env.failing()) {
2609 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2610 }
2611 if (event.should_commit()) {
2612 post_compilation_event(event, task);
2613 }
2614 }
2615
2616 if (failure_reason != nullptr) {
2617 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2618 if (CompilationLog::log() != nullptr) {
2619 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2620 }
2621 if (PrintCompilation || directive->PrintCompilationOption) {
2622 FormatBufferResource msg = retry_message != nullptr ?
2623 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2624 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2625 task->print(tty, msg);
2626 }
2627 }
2628
2629 task->mark_finished(os::elapsed_counter());
2630 DirectivesStack::release(directive);
2631
2632 methodHandle method(thread, task->method());
2633
2634 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2635
2636 collect_statistics(thread, time, task);
2637
2638 if (PrintCompilation && PrintCompilation2) {
2639 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2640 tty->print("%4d ", compile_id); // print compilation number
2641 tty->print("%s ", (is_osr ? "%" : (task->is_aot_load() ? (task->preload() ? "P" : "A") : " ")));
2642 if (task->is_success()) {
2643 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2644 }
2645 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2646 }
2647
2648 Log(compilation, codecache) log;
2649 if (log.is_debug()) {
2650 LogStream ls(log.debug());
2651 codecache_print(&ls, /* detailed= */ false);
2652 }
2653 if (PrintCodeCacheOnCompilation) {
2654 codecache_print(/* detailed= */ false);
2655 }
2656 // Disable compilation, if required.
2657 switch (compilable) {
2658 case ciEnv::MethodCompilable_never:
2659 if (is_osr)
2660 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2661 else
2662 method->set_not_compilable_quietly("MethodCompilable_never");
2663 break;
2664 case ciEnv::MethodCompilable_not_at_tier:
2665 if (is_osr)
2666 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2667 else
2668 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2669 break;
2670 }
2671
2672 // Note that the queued_for_compilation bits are cleared without
2673 // protection of a mutex. [They were set by the requester thread,
2674 // when adding the task to the compile queue -- at which time the
2675 // compile queue lock was held. Subsequently, we acquired the compile
2676 // queue lock to get this task off the compile queue; thus (to belabour
2677 // the point somewhat) our clearing of the bits must be occurring
2678 // only after the setting of the bits. See also 14012000 above.
2679 method->clear_queued_for_compilation();
2680 method->set_pending_queue_processed(false);
2681
2682 if (should_print_compilation) {
2683 ResourceMark rm;
2684 task->print_tty();
2685 }
2686 }
2687
2688 /**
2689 * The CodeCache is full. Print warning and disable compilation.
2690 * Schedule code cache cleaning so compilation can continue later.
2691 * This function needs to be called only from CodeCache::allocate(),
2692 * since we currently handle a full code cache uniformly.
2693 */
2694 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2695 UseInterpreter = true;
2696 if (UseCompiler || AlwaysCompileLoopMethods ) {
2697 if (xtty != nullptr) {
2698 stringStream s;
2699 // Dump code cache state into a buffer before locking the tty,
2700 // because log_state() will use locks causing lock conflicts.
2701 CodeCache::log_state(&s);
2702 // Lock to prevent tearing
2703 ttyLocker ttyl;
2704 xtty->begin_elem("code_cache_full");
2705 xtty->print("%s", s.freeze());
2706 xtty->stamp();
2707 xtty->end_elem();
2708 }
2709
2710 #ifndef PRODUCT
2711 if (ExitOnFullCodeCache) {
2712 codecache_print(/* detailed= */ true);
2713 before_exit(JavaThread::current());
2714 exit_globals(); // will delete tty
2715 vm_direct_exit(1);
2716 }
2717 #endif
2718 if (UseCodeCacheFlushing) {
2719 // Since code cache is full, immediately stop new compiles
2720 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2721 log_info(codecache)("Code cache is full - disabling compilation");
2722 }
2723 } else {
2724 disable_compilation_forever();
2725 }
2726
2727 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2728 }
2729 }
2730
2731 // ------------------------------------------------------------------
2732 // CompileBroker::update_compile_perf_data
2733 //
2734 // Record this compilation for debugging purposes.
2735 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2736 ResourceMark rm;
2737 char* method_name = method->name()->as_C_string();
2738 char current_method[CompilerCounters::cmname_buffer_length];
2739 size_t maxLen = CompilerCounters::cmname_buffer_length;
2740
2741 const char* class_name = method->method_holder()->name()->as_C_string();
2742
2743 size_t s1len = strlen(class_name);
2744 size_t s2len = strlen(method_name);
2745
2746 // check if we need to truncate the string
2747 if (s1len + s2len + 2 > maxLen) {
2748
2749 // the strategy is to lop off the leading characters of the
2750 // class name and the trailing characters of the method name.
2751
2752 if (s2len + 2 > maxLen) {
2753 // lop of the entire class name string, let snprintf handle
2754 // truncation of the method name.
2755 class_name += s1len; // null string
2756 }
2757 else {
2758 // lop off the extra characters from the front of the class name
2759 class_name += ((s1len + s2len + 2) - maxLen);
2760 }
2761 }
2762
2763 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2764
2765 int last_compile_type = normal_compile;
2766 if (CICountOSR && is_osr) {
2767 last_compile_type = osr_compile;
2768 } else if (CICountNative && method->is_native()) {
2769 last_compile_type = native_compile;
2770 }
2771
2772 CompilerCounters* counters = thread->counters();
2773 counters->set_current_method(current_method);
2774 counters->set_compile_type((jlong) last_compile_type);
2775 }
2776
2777 // ------------------------------------------------------------------
2778 // CompileBroker::collect_statistics
2779 //
2780 // Collect statistics about the compilation.
2781
2782 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2783 bool success = task->is_success();
2784 methodHandle method (thread, task->method());
2785 int compile_id = task->compile_id();
2786 bool is_osr = (task->osr_bci() != standard_entry_bci);
2787 const int comp_level = task->comp_level();
2788 CompilerCounters* counters = thread->counters();
2789
2790 MutexLocker locker(CompileStatistics_lock);
2791
2792 // _perf variables are production performance counters which are
2793 // updated regardless of the setting of the CITime and CITimeEach flags
2794 //
2795
2796 // account all time, including bailouts and failures in this counter;
2797 // C1 and C2 counters are counting both successful and unsuccessful compiles
2798 _t_total_compilation.add(&time);
2799
2800 // Update compilation times. Used by the implementation of JFR CompilerStatistics
2801 // and java.lang.management.CompilationMXBean.
2802 _perf_total_compilation->inc(time.ticks());
2803 _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2804
2805 if (!success) {
2806 _total_bailout_count++;
2807 if (UsePerfData) {
2808 _perf_last_failed_method->set_value(counters->current_method());
2809 _perf_last_failed_type->set_value(counters->compile_type());
2810 _perf_total_bailout_count->inc();
2811 }
2812 _t_bailedout_compilation.add(&time);
2813
2814 if (CITime || log_is_enabled(Info, init)) {
2815 CompilerStatistics* stats = nullptr;
2816 if (task->is_aot_load()) {
2817 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2818 stats = &_aot_stats_per_level[level];
2819 } else {
2820 stats = &_stats_per_level[comp_level-1];
2821 }
2822 stats->_bailout.update(time, 0);
2823 }
2824 } else if (!task->is_success()) {
2825 if (UsePerfData) {
2826 _perf_last_invalidated_method->set_value(counters->current_method());
2827 _perf_last_invalidated_type->set_value(counters->compile_type());
2828 _perf_total_invalidated_count->inc();
2829 }
2830 _total_invalidated_count++;
2831 _t_invalidated_compilation.add(&time);
2832
2833 if (CITime || log_is_enabled(Info, init)) {
2834 CompilerStatistics* stats = nullptr;
2835 if (task->is_aot_load()) {
2836 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2837 stats = &_aot_stats_per_level[level];
2838 } else {
2839 stats = &_stats_per_level[comp_level-1];
2840 }
2841 stats->_invalidated.update(time, 0);
2842 }
2843 } else {
2844 // Compilation succeeded
2845 if (CITime || log_is_enabled(Info, init)) {
2846 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2847 if (is_osr) {
2848 _t_osr_compilation.add(&time);
2849 _sum_osr_bytes_compiled += bytes_compiled;
2850 } else {
2851 _t_standard_compilation.add(&time);
2852 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2853 }
2854
2855 // Collect statistic per compilation level
2856 if (task->is_aot_load()) {
2857 _aot_stats._standard.update(time, bytes_compiled);
2858 _aot_stats._nmethods_size += task->nm_total_size();
2859 _aot_stats._nmethods_code_size += task->nm_insts_size();
2860 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2861 CompilerStatistics* stats = &_aot_stats_per_level[level];
2862 stats->_standard.update(time, bytes_compiled);
2863 stats->_nmethods_size += task->nm_total_size();
2864 stats->_nmethods_code_size += task->nm_insts_size();
2865 } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2866 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2867 if (is_osr) {
2868 stats->_osr.update(time, bytes_compiled);
2869 } else {
2870 stats->_standard.update(time, bytes_compiled);
2871 }
2872 stats->_nmethods_size += task->nm_total_size();
2873 stats->_nmethods_code_size += task->nm_insts_size();
2874 } else {
2875 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2876 }
2877
2878 // Collect statistic per compiler
2879 AbstractCompiler* comp = task->compiler();
2880 if (comp && !task->is_aot_load()) {
2881 CompilerStatistics* stats = comp->stats();
2882 if (is_osr) {
2883 stats->_osr.update(time, bytes_compiled);
2884 } else {
2885 stats->_standard.update(time, bytes_compiled);
2886 }
2887 stats->_nmethods_size += task->nm_total_size();
2888 stats->_nmethods_code_size += task->nm_insts_size();
2889 } else if (!task->is_aot_load()) { // if (!comp)
2890 assert(false, "Compiler object must exist");
2891 }
2892 }
2893
2894 if (UsePerfData) {
2895 // save the name of the last method compiled
2896 _perf_last_method->set_value(counters->current_method());
2897 _perf_last_compile_type->set_value(counters->compile_type());
2898 _perf_last_compile_size->set_value(method->code_size() +
2899 task->num_inlined_bytecodes());
2900 if (is_osr) {
2901 _perf_osr_compilation->inc(time.ticks());
2902 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2903 } else {
2904 _perf_standard_compilation->inc(time.ticks());
2905 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2906 }
2907 }
2908
2909 if (CITimeEach) {
2910 double compile_time = time.seconds();
2911 double bytes_per_sec = compile_time == 0.0 ? 0.0 : (double)(method->code_size() + task->num_inlined_bytecodes()) / compile_time;
2912 tty->print_cr("%3d seconds: %6.3f bytes/sec : %f (bytes %d + %d inlined)",
2913 compile_id, compile_time, bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2914 }
2915
2916 // Collect counts of successful compilations
2917 _sum_nmethod_size += task->nm_total_size();
2918 _sum_nmethod_code_size += task->nm_insts_size();
2919 _total_compile_count++;
2920
2921 if (UsePerfData) {
2922 _perf_sum_nmethod_size->inc( task->nm_total_size());
2923 _perf_sum_nmethod_code_size->inc(task->nm_insts_size());
2924 _perf_total_compile_count->inc();
2925 }
2926
2927 if (is_osr) {
2928 if (UsePerfData) _perf_total_osr_compile_count->inc();
2929 _total_osr_compile_count++;
2930 } else {
2931 if (UsePerfData) _perf_total_standard_compile_count->inc();
2932 _total_standard_compile_count++;
2933 }
2934 }
2935 // set the current method for the thread to null
2936 if (UsePerfData) counters->set_current_method("");
2937 }
2938
2939 const char* CompileBroker::compiler_name(int comp_level) {
2940 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2941 if (comp == nullptr) {
2942 return "no compiler";
2943 } else {
2944 return (comp->name());
2945 }
2946 }
2947
2948 jlong CompileBroker::total_compilation_ticks() {
2949 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2950 }
2951
2952 void CompileBroker::log_not_entrant(nmethod* nm) {
2953 _total_not_entrant_count++;
2954 if (CITime || log_is_enabled(Info, init)) {
2955 CompilerStatistics* stats = nullptr;
2956 int level = nm->comp_level();
2957 if (nm->is_aot()) {
2958 if (nm->preloaded()) {
2959 assert(level == CompLevel_full_optimization, "%d", level);
2960 level = CompLevel_full_optimization + 1;
2961 }
2962 stats = &_aot_stats_per_level[level - 1];
2963 } else {
2964 stats = &_stats_per_level[level - 1];
2965 }
2966 stats->_made_not_entrant._count++;
2967 }
2968 }
2969
2970 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2971 tty->print_cr(" %s {speed: %6.3f bytes/s; standard: %6.3f s, %u bytes, %u methods; osr: %6.3f s, %u bytes, %u methods; nmethods_size: %u bytes; nmethods_code_size: %u bytes}",
2972 name, stats->bytes_per_second(),
2973 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2974 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2975 stats->_nmethods_size, stats->_nmethods_code_size);
2976 }
2977
2978 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
2979 if (data._count > 0) {
2980 st->print("; %s: %4u methods", name, data._count);
2981 if (print_time) {
2982 st->print(" (in %.3fs)", data._time.seconds());
2983 }
2984 }
2985 }
2986
2987 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
2988 st->print(" %s%d: %5u methods", prefix, tier, stats->_standard._count);
2989 if (stats->_standard._count > 0) {
2990 st->print(" (in %.3fs)", stats->_standard._time.seconds());
2991 }
2992 print_helper(st, "osr", stats->_osr);
2993 print_helper(st, "bailout", stats->_bailout);
2994 print_helper(st, "invalid", stats->_invalidated);
2995 print_helper(st, "not_entrant", stats->_made_not_entrant, false);
2996 st->cr();
2997 }
2998
2999 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3000 if (queue != nullptr) {
3001 MutexLocker ml(queue->lock());
3002
3003 uint total_cnt = 0;
3004 uint active_cnt = 0;
3005 for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3006 guarantee(jt != nullptr, "");
3007 if (jt->is_Compiler_thread()) {
3008 CompilerThread* ct = (CompilerThread*)jt;
3009
3010 guarantee(ct != nullptr, "");
3011 if (ct->queue() == queue) {
3012 ++total_cnt;
3013 CompileTask* task = ct->task();
3014 if (task != nullptr) {
3015 ++active_cnt;
3016 }
3017 }
3018 }
3019 }
3020
3021 st->print(" %s (%d active / %d total threads): %u tasks",
3022 queue->name(), active_cnt, total_cnt, queue->size());
3023 if (queue->size() > 0) {
3024 uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3025 for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3026 int tier = task->comp_level();
3027 if (task->is_aot_load() && task->preload()) {
3028 assert(tier == CompLevel_full_optimization, "%d", tier);
3029 tier = CompLevel_full_optimization + 1;
3030 }
3031 counts[tier-1]++;
3032 }
3033 st->print(":");
3034 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3035 uint cnt = counts[tier-1];
3036 if (cnt > 0) {
3037 st->print(" T%d: %u tasks;", tier, cnt);
3038 }
3039 }
3040 }
3041 st->cr();
3042
3043 // for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3044 // guarantee(jt != nullptr, "");
3045 // if (jt->is_Compiler_thread()) {
3046 // CompilerThread* ct = (CompilerThread*)jt;
3047 //
3048 // guarantee(ct != nullptr, "");
3049 // if (ct->queue() == queue) {
3050 // ResourceMark rm;
3051 // CompileTask* task = ct->task();
3052 // st->print(" %s: ", ct->name_raw());
3053 // if (task != nullptr) {
3054 // task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3055 // }
3056 // st->cr();
3057 // }
3058 // }
3059 // }
3060 }
3061 }
3062 void CompileBroker::print_statistics_on(outputStream* st) {
3063 st->print_cr(" Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3064 _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3065 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3066 print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3067 }
3068 st->cr();
3069
3070 if (AOTCodeCaching) {
3071 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3072 if (tier != CompLevel_full_profile) {
3073 print_tier_helper(st, "AOT Code T", tier, &_aot_stats_per_level[tier - 1]);
3074 }
3075 }
3076 st->cr();
3077 }
3078
3079 print_queue_info(st, _c1_compile_queue);
3080 print_queue_info(st, _c2_compile_queue);
3081 print_queue_info(st, _ac1_compile_queue);
3082 print_queue_info(st, _ac2_compile_queue);
3083 }
3084
3085 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3086 if (per_compiler) {
3087 if (aggregate) {
3088 tty->cr();
3089 tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3090 tty->print_cr("------------------------------------------------");
3091 tty->cr();
3092 }
3093 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3094 AbstractCompiler* comp = _compilers[i];
3095 if (comp != nullptr) {
3096 print_times(comp->name(), comp->stats());
3097 }
3098 }
3099 if (_aot_stats._standard._count > 0) {
3100 print_times("SC", &_aot_stats);
3101 }
3102 if (aggregate) {
3103 tty->cr();
3104 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3105 tty->print_cr("------------------------------------------------");
3106 tty->cr();
3107 }
3108 char tier_name[256];
3109 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3110 CompilerStatistics* stats = &_stats_per_level[tier-1];
3111 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3112 print_times(tier_name, stats);
3113 }
3114 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3115 CompilerStatistics* stats = &_aot_stats_per_level[tier-1];
3116 if (stats->_standard._bytes > 0) {
3117 os::snprintf_checked(tier_name, sizeof(tier_name), "AOT Code T%d", tier);
3118 print_times(tier_name, stats);
3119 }
3120 }
3121 }
3122
3123 if (!aggregate) {
3124 return;
3125 }
3126
3127 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3128 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3129 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3130
3131 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3132 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3133
3134 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3135 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3136 uint total_compile_count = CompileBroker::_total_compile_count;
3137 uint total_bailout_count = CompileBroker::_total_bailout_count;
3138 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3139
3140 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
3141 uint nmethods_size = CompileBroker::_sum_nmethod_size;
3142
3143 tty->cr();
3144 tty->print_cr("Accumulated compiler times");
3145 tty->print_cr("----------------------------------------------------------");
3146 //0000000000111111111122222222223333333333444444444455555555556666666666
3147 //0123456789012345678901234567890123456789012345678901234567890123456789
3148 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
3149 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
3150 standard_compilation.seconds(),
3151 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3152 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
3153 CompileBroker::_t_bailedout_compilation.seconds(),
3154 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3155 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
3156 osr_compilation.seconds(),
3157 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3158 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
3159 CompileBroker::_t_invalidated_compilation.seconds(),
3160 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3161
3162 if (AOTCodeCaching) { // Check flags because AOT code cache could be closed already
3163 tty->cr();
3164 AOTCodeCache::print_timers_on(tty);
3165 }
3166 AbstractCompiler *comp = compiler(CompLevel_simple);
3167 if (comp != nullptr) {
3168 tty->cr();
3169 comp->print_timers();
3170 }
3171 comp = compiler(CompLevel_full_optimization);
3172 if (comp != nullptr) {
3173 tty->cr();
3174 comp->print_timers();
3175 }
3176 #if INCLUDE_JVMCI
3177 if (EnableJVMCI) {
3178 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3179 if (jvmci_comp != nullptr && jvmci_comp != comp) {
3180 tty->cr();
3181 jvmci_comp->print_timers();
3182 }
3183 }
3184 #endif
3185
3186 tty->cr();
3187 tty->print_cr(" Total compiled methods : %8u methods", total_compile_count);
3188 tty->print_cr(" Standard compilation : %8u methods", standard_compile_count);
3189 tty->print_cr(" On stack replacement : %8u methods", osr_compile_count);
3190 uint tcb = osr_bytes_compiled + standard_bytes_compiled;
3191 tty->print_cr(" Total compiled bytecodes : %8u bytes", tcb);
3192 tty->print_cr(" Standard compilation : %8u bytes", standard_bytes_compiled);
3193 tty->print_cr(" On stack replacement : %8u bytes", osr_bytes_compiled);
3194 double tcs = total_compilation.seconds();
3195 uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
3196 tty->print_cr(" Average compilation speed : %8u bytes/s", bps);
3197 tty->cr();
3198 tty->print_cr(" nmethod code size : %8u bytes", nmethods_code_size);
3199 tty->print_cr(" nmethod total size : %8u bytes", nmethods_size);
3200 }
3201
3202 // Print general/accumulated JIT information.
3203 void CompileBroker::print_info(outputStream *out) {
3204 if (out == nullptr) out = tty;
3205 out->cr();
3206 out->print_cr("======================");
3207 out->print_cr(" General JIT info ");
3208 out->print_cr("======================");
3209 out->cr();
3210 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
3211 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
3212 out->cr();
3213 out->print_cr("CodeCache overview");
3214 out->print_cr("--------------------------------------------------------");
3215 out->cr();
3216 out->print_cr(" Reserved size : %7zu KB", CodeCache::max_capacity() / K);
3217 out->print_cr(" Committed size : %7zu KB", CodeCache::capacity() / K);
3218 out->print_cr(" Unallocated capacity : %7zu KB", CodeCache::unallocated_capacity() / K);
3219 out->cr();
3220 }
3221
3222 // Note: tty_lock must not be held upon entry to this function.
3223 // Print functions called from herein do "micro-locking" on tty_lock.
3224 // That's a tradeoff which keeps together important blocks of output.
3225 // At the same time, continuous tty_lock hold time is kept in check,
3226 // preventing concurrently printing threads from stalling a long time.
3227 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
3228 TimeStamp ts_total;
3229 TimeStamp ts_global;
3230 TimeStamp ts;
3231
3232 bool allFun = !strcmp(function, "all");
3233 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
3234 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
3235 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
3236 bool methodCount = !strcmp(function, "MethodCount") || allFun;
3237 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
3238 bool methodAge = !strcmp(function, "MethodAge") || allFun;
3239 bool methodNames = !strcmp(function, "MethodNames") || allFun;
3240 bool discard = !strcmp(function, "discard") || allFun;
3241
3242 if (out == nullptr) {
3243 out = tty;
3244 }
3245
3246 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
3247 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
3248 out->cr();
3249 return;
3250 }
3251
3252 ts_total.update(); // record starting point
3253
3254 if (aggregate) {
3255 print_info(out);
3256 }
3257
3258 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
3259 // That prevents other threads from destroying (making inconsistent) our view on the CodeHeap.
3260 // When we request individual parts of the analysis via the jcmd interface, it is possible
3261 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
3262 // updated the aggregated data. We will then see a modified, but again consistent, view
3263 // on the CodeHeap. That's a tolerable tradeoff we have to accept because we can't hold
3264 // a lock across user interaction.
3265
3266 // We should definitely acquire this lock before acquiring Compile_lock and CodeCache_lock.
3267 // CodeHeapStateAnalytics_lock may be held by a concurrent thread for a long time,
3268 // leading to an unnecessarily long hold time of the other locks we acquired before.
3269 ts.update(); // record starting point
3270 MutexLocker mu0(CodeHeapStateAnalytics_lock, Mutex::_safepoint_check_flag);
3271 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
3272
3273 // Holding the CodeCache_lock protects from concurrent alterations of the CodeCache.
3274 // Unfortunately, such protection is not sufficient:
3275 // When a new nmethod is created via ciEnv::register_method(), the
3276 // Compile_lock is taken first. After some initializations,
3277 // nmethod::new_nmethod() takes over, grabbing the CodeCache_lock
3278 // immediately (after finalizing the oop references). To lock out concurrent
3279 // modifiers, we have to grab both locks as well in the described sequence.
3280 //
3281 // If we serve an "allFun" call, it is beneficial to hold CodeCache_lock and Compile_lock
3282 // for the entire duration of aggregation and printing. That makes sure we see
3283 // a consistent picture and do not run into issues caused by concurrent alterations.
3284 bool should_take_Compile_lock = !SafepointSynchronize::is_at_safepoint() &&
3285 !Compile_lock->owned_by_self();
3286 bool should_take_CodeCache_lock = !SafepointSynchronize::is_at_safepoint() &&
3287 !CodeCache_lock->owned_by_self();
3288 bool take_global_lock_1 = allFun && should_take_Compile_lock;
3289 bool take_global_lock_2 = allFun && should_take_CodeCache_lock;
3290 bool take_function_lock_1 = !allFun && should_take_Compile_lock;
3291 bool take_function_lock_2 = !allFun && should_take_CodeCache_lock;
3292 bool take_global_locks = take_global_lock_1 || take_global_lock_2;
3293 bool take_function_locks = take_function_lock_1 || take_function_lock_2;
3294
3295 ts_global.update(); // record starting point
3296
3297 ConditionalMutexLocker mu1(Compile_lock, take_global_lock_1, Mutex::_safepoint_check_flag);
3298 ConditionalMutexLocker mu2(CodeCache_lock, take_global_lock_2, Mutex::_no_safepoint_check_flag);
3299 if (take_global_locks) {
3300 out->print_cr("\n__ Compile & CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
3301 ts_global.update(); // record starting point
3302 }
3303
3304 if (aggregate) {
3305 ts.update(); // record starting point
3306 ConditionalMutexLocker mu11(Compile_lock, take_function_lock_1, Mutex::_safepoint_check_flag);
3307 ConditionalMutexLocker mu22(CodeCache_lock, take_function_lock_2, Mutex::_no_safepoint_check_flag);
3308 if (take_function_locks) {
3309 out->print_cr("\n__ Compile & CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
3310 }
3311
3312 ts.update(); // record starting point
3313 CodeCache::aggregate(out, granularity);
3314 if (take_function_locks) {
3315 out->print_cr("\n__ Compile & CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
3316 }
3317 }
3318
3319 if (usedSpace) CodeCache::print_usedSpace(out);
3320 if (freeSpace) CodeCache::print_freeSpace(out);
3321 if (methodCount) CodeCache::print_count(out);
3322 if (methodSpace) CodeCache::print_space(out);
3323 if (methodAge) CodeCache::print_age(out);
3324 if (methodNames) {
3325 if (allFun) {
3326 // print_names() can only be used safely if the locks have been continuously held
3327 // since aggregation begin. That is true only for function "all".
3328 CodeCache::print_names(out);
3329 } else {
3330 out->print_cr("\nCodeHeapStateAnalytics: Function 'MethodNames' is only available as part of function 'all'");
3331 }
3332 }
3333 if (discard) CodeCache::discard(out);
3334
3335 if (take_global_locks) {
3336 out->print_cr("\n__ Compile & CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
3337 }
3338 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
3339 }