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[3];
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::_c3_count = 0;
142 int CompileBroker::_ac_count = 0;
143
144 // An array of compiler names as Java String objects
145 jobject* CompileBroker::_compiler1_objects = nullptr;
146 jobject* CompileBroker::_compiler2_objects = nullptr;
147 jobject* CompileBroker::_compiler3_objects = nullptr;
148 jobject* CompileBroker::_ac_objects = nullptr;
149
150 CompileLog** CompileBroker::_compiler1_logs = nullptr;
151 CompileLog** CompileBroker::_compiler2_logs = nullptr;
152 CompileLog** CompileBroker::_compiler3_logs = nullptr;
153 CompileLog** CompileBroker::_ac_logs = nullptr;
154
155 // These counters are used to assign an unique ID to each compilation.
156 volatile jint CompileBroker::_compilation_id = 0;
157 volatile jint CompileBroker::_osr_compilation_id = 0;
158 volatile jint CompileBroker::_native_compilation_id = 0;
159
160 // Performance counters
161 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
162 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
163 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
164
165 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
166 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
167 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
168 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
169 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
170
171 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
172 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
173 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
174 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
175
176 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
177 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
178 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
179 PerfVariable* CompileBroker::_perf_last_compile_type = nullptr;
180 PerfVariable* CompileBroker::_perf_last_compile_size = nullptr;
181 PerfVariable* CompileBroker::_perf_last_failed_type = nullptr;
182 PerfVariable* CompileBroker::_perf_last_invalidated_type = nullptr;
183
184 // Timers and counters for generating statistics
185 elapsedTimer CompileBroker::_t_total_compilation;
186 elapsedTimer CompileBroker::_t_osr_compilation;
187 elapsedTimer CompileBroker::_t_standard_compilation;
188 elapsedTimer CompileBroker::_t_invalidated_compilation;
189 elapsedTimer CompileBroker::_t_bailedout_compilation;
190
191 uint CompileBroker::_total_bailout_count = 0;
192 uint CompileBroker::_total_invalidated_count = 0;
193 uint CompileBroker::_total_not_entrant_count = 0;
194 uint CompileBroker::_total_compile_count = 0;
195 uint CompileBroker::_total_osr_compile_count = 0;
196 uint CompileBroker::_total_standard_compile_count = 0;
197 uint CompileBroker::_total_compiler_stopped_count = 0;
198 uint CompileBroker::_total_compiler_restarted_count = 0;
199
200 uint CompileBroker::_sum_osr_bytes_compiled = 0;
201 uint CompileBroker::_sum_standard_bytes_compiled = 0;
202 uint CompileBroker::_sum_nmethod_size = 0;
203 uint CompileBroker::_sum_nmethod_code_size = 0;
204
205 jlong CompileBroker::_peak_compilation_time = 0;
206
207 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
208 CompilerStatistics CompileBroker::_aot_stats;
209 CompilerStatistics CompileBroker::_aot_stats_per_level[CompLevel_full_optimization + 1];
210
211 CompileQueue* CompileBroker::_c3_compile_queue = nullptr;
212 CompileQueue* CompileBroker::_c2_compile_queue = nullptr;
213 CompileQueue* CompileBroker::_c1_compile_queue = nullptr;
214 CompileQueue* CompileBroker::_ac1_compile_queue = nullptr;
215 CompileQueue* CompileBroker::_ac2_compile_queue = nullptr;
216
217 bool compileBroker_init() {
218 if (LogEvents) {
219 CompilationLog::init();
220 }
221
222 // init directives stack, adding default directive
223 DirectivesStack::init();
224
225 if (DirectivesParser::has_file()) {
226 return DirectivesParser::parse_from_flag();
227 } else if (CompilerDirectivesPrint) {
228 // Print default directive even when no other was added
229 DirectivesStack::print(tty);
230 }
231
232 return true;
233 }
234
235 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
236 CompilerThread* thread = CompilerThread::current();
237 thread->set_task(task);
238 CompileLog* log = thread->log();
239 if (log != nullptr && !task->is_unloaded()) task->log_task_start(log);
240 }
241
242 CompileTaskWrapper::~CompileTaskWrapper() {
243 CompilerThread* thread = CompilerThread::current();
244 CompileTask* task = thread->task();
245 CompileLog* log = thread->log();
246 AbstractCompiler* comp = thread->compiler();
247 if (log != nullptr && !task->is_unloaded()) task->log_task_done(log);
248 thread->set_task(nullptr);
249 thread->set_env(nullptr);
250 if (task->is_blocking()) {
251 bool free_task = false;
252 {
253 MutexLocker notifier(thread, CompileTaskWait_lock);
254 task->mark_complete();
255 #if INCLUDE_JVMCI
256 if (comp->is_jvmci()) {
257 if (!task->has_waiter()) {
258 // The waiting thread timed out and thus did not delete the task.
259 free_task = true;
260 }
261 task->set_blocking_jvmci_compile_state(nullptr);
262 }
263 #endif
264 if (!free_task) {
265 // Notify the waiting thread that the compilation has completed
266 // so that it can free the task.
267 CompileTaskWait_lock->notify_all();
268 }
269 }
270 if (free_task) {
271 // The task can only be deleted once the task lock is released.
272 delete task;
273 }
274 } else {
275 task->mark_complete();
276
277 // By convention, the compiling thread is responsible for deleting
278 // a non-blocking CompileTask.
279 delete task;
280 }
281 }
282
283 /**
284 * Check if a CompilerThread can be removed and update count if requested.
285 */
286 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
287 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
288 if (!ReduceNumberOfCompilerThreads) return false;
289
290 if (RecompilationPolicy::have_recompilation_work()) return false;
291
292 AbstractCompiler *compiler = ct->compiler();
293 int compiler_count = compiler->num_compiler_threads();
294 bool c1 = compiler->is_c1();
295
296 // Keep at least 1 compiler thread of each type.
297 if (compiler_count < 2) return false;
298
299 // Keep thread alive for at least some time.
300 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
301
302 #if INCLUDE_JVMCI
303 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
304 // Handles for JVMCI thread objects may get released concurrently.
305 if (do_it) {
306 assert(CompileThread_lock->owner() == ct, "must be holding lock");
307 } else {
308 // Skip check if it's the last thread and let caller check again.
309 return true;
310 }
311 }
312 #endif
313
314 // We only allow the last compiler thread of each type to get removed.
315 jobject last_compiler = c1 ? compiler1_object(compiler_count - 1)
316 : compiler2_object(compiler_count - 1);
317 if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) {
318 if (do_it) {
319 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
320 compiler->set_num_compiler_threads(compiler_count - 1);
321 #if INCLUDE_JVMCI
322 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
323 // Old j.l.Thread object can die when no longer referenced elsewhere.
324 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
325 _compiler2_objects[compiler_count - 1] = nullptr;
326 }
327 #endif
328 }
329 return true;
330 }
331 return false;
332 }
333
334 /**
335 * Add a CompileTask to a CompileQueue.
336 */
337 void CompileQueue::add(CompileTask* task) {
338 assert(_lock->owned_by_self(), "must own lock");
339
340 task->set_next(nullptr);
341 task->set_prev(nullptr);
342
343 if (_last == nullptr) {
344 // The compile queue is empty.
345 assert(_first == nullptr, "queue is empty");
346 _first = task;
347 _last = task;
348 } else {
349 // Append the task to the queue.
350 assert(_last->next() == nullptr, "not last");
351 _last->set_next(task);
352 task->set_prev(_last);
353 _last = task;
354 }
355 ++_size;
356 ++_total_added;
357 if (_size > _peak_size) {
358 _peak_size = _size;
359 }
360
361 // Mark the method as being in the compile queue.
362 task->method()->set_queued_for_compilation();
363
364 task->mark_queued(os::elapsed_counter());
365
366 if (CIPrintCompileQueue) {
367 print_tty();
368 }
369
370 if (LogCompilation && xtty != nullptr) {
371 task->log_task_queued();
372 }
373
374 if (TrainingData::need_data() && !CDSConfig::is_dumping_final_static_archive()) {
375 CompileTrainingData* ctd = CompileTrainingData::make(task);
376 if (ctd != nullptr) {
377 task->set_training_data(ctd);
378 }
379 }
380
381 // Notify CompilerThreads that a task is available.
382 _lock->notify_all();
383 }
384
385 void CompileQueue::add_pending(CompileTask* task) {
386 assert(_lock->owned_by_self() == false, "must NOT own lock");
387 assert(UseLockFreeCompileQueues, "");
388 task->method()->set_queued_for_compilation();
389 _queue.push(*task);
390 // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
391 if (is_empty()) {
392 MutexLocker ml(_lock);
393 _lock->notify_all();
394 }
395 }
396
397 static bool process_pending(CompileTask* task) {
398 // guarantee(task->method()->queued_for_compilation(), "");
399 if (task->is_unloaded()) {
400 return true; // unloaded
401 }
402 task->method()->set_queued_for_compilation(); // FIXME
403 if (task->method()->pending_queue_processed()) {
404 return true; // already queued
405 }
406 // Mark the method as being in the compile queue.
407 task->method()->set_pending_queue_processed();
408 if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
409 task->requires_online_compilation(), task->compile_reason())) {
410 return true; // already compiled
411 }
412 return false; // active
413 }
414
415 void CompileQueue::transfer_pending() {
416 assert(_lock->owned_by_self(), "must own lock");
417
418 CompileTask* task;
419 while ((task = _queue.pop()) != nullptr) {
420 bool is_stale = process_pending(task);
421 if (is_stale) {
422 task->set_next(_first_stale);
423 task->set_prev(nullptr);
424 _first_stale = task;
425 } else {
426 add(task);
427 }
428 }
429 }
430
431 /**
432 * Empties compilation queue by deleting all compilation tasks.
433 * Furthermore, the method wakes up all threads that are waiting
434 * on a compilation task to finish. This can happen if background
435 * compilation is disabled.
436 */
437 void CompileQueue::delete_all() {
438 MutexLocker mu(_lock);
439 transfer_pending();
440
441 CompileTask* next = _first;
442
443 // Iterate over all tasks in the compile queue
444 while (next != nullptr) {
445 CompileTask* current = next;
446 next = current->next();
447 bool found_waiter = false;
448 {
449 MutexLocker ct_lock(CompileTaskWait_lock);
450 assert(current->waiting_for_completion_count() <= 1, "more than one thread are waiting for task");
451 if (current->waiting_for_completion_count() > 0) {
452 // If another thread waits for this task, we must wake them up
453 // so they will stop waiting and free the task.
454 CompileTaskWait_lock->notify_all();
455 found_waiter = true;
456 }
457 }
458 if (!found_waiter) {
459 // If no one was waiting for this task, we need to delete it ourselves.
460 // In this case, the task is also certainly unlocked, because, again, there is no waiter.
461 // Otherwise, by convention, it's the waiters responsibility to delete the task.
462 delete current;
463 }
464 }
465 _first = nullptr;
466 _last = nullptr;
467
468 // Wake up all threads that block on the queue.
469 _lock->notify_all();
470 }
471
472 /**
473 * Get the next CompileTask from a CompileQueue
474 */
475 CompileTask* CompileQueue::get(CompilerThread* thread) {
476 // save methods from RedefineClasses across safepoint
477 // across compile queue lock below.
478 methodHandle save_method;
479
480 MonitorLocker locker(_lock);
481 transfer_pending();
482
483 RecompilationPolicy::sample_load_average();
484
485 // If _first is null we have no more compile jobs. There are two reasons for
486 // having no compile jobs: First, we compiled everything we wanted. Second,
487 // we ran out of code cache so compilation has been disabled. In the latter
488 // case we perform code cache sweeps to free memory such that we can re-enable
489 // compilation.
490 while (_first == nullptr) {
491 // Exit loop if compilation is disabled forever
492 if (CompileBroker::is_compilation_disabled_forever()) {
493 return nullptr;
494 }
495
496 AbstractCompiler* compiler = thread->compiler();
497 guarantee(compiler != nullptr, "Compiler object must exist");
498 compiler->on_empty_queue(this, thread);
499 if (_first != nullptr) {
500 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
501 // so check again whether any tasks were added to the queue.
502 break;
503 }
504
505 // If we have added stale tasks, there might be waiters that want
506 // the notification these tasks have failed. Normally, this would
507 // be done by a compiler thread that would perform the purge at
508 // the end of some compilation. But, if compile queue is empty,
509 // there is no guarantee compilers would run and do the purge.
510 // Do the purge here and now to unblock the waiters.
511 // Perform this until we run out of stale tasks.
512 while (_first_stale != nullptr) {
513 purge_stale_tasks();
514 }
515 if (_first != nullptr) {
516 // Purge stale tasks may have transferred some new tasks,
517 // so check again.
518 break;
519 }
520
521 // If there are no compilation tasks and we can compile new jobs
522 // (i.e., there is enough free space in the code cache) there is
523 // no need to invoke the GC.
524 // We need a timed wait here, since compiler threads can exit if compilation
525 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
526 // is not critical and we do not want idle compiler threads to wake up too often.
527 locker.wait(5*1000);
528
529 transfer_pending(); // reacquired lock
530
531 if (RecompilationPolicy::have_recompilation_work()) return nullptr;
532
533 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
534 // Still nothing to compile. Give caller a chance to stop this thread.
535 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
536 }
537 }
538
539 if (CompileBroker::is_compilation_disabled_forever()) {
540 return nullptr;
541 }
542
543 CompileTask* task;
544 {
545 NoSafepointVerifier nsv;
546 task = CompilationPolicy::select_task(this, thread);
547 if (task != nullptr) {
548 task = task->select_for_compilation();
549 }
550 }
551
552 if (task != nullptr) {
553 // Save method pointers across unlock safepoint. The task is removed from
554 // the compilation queue, which is walked during RedefineClasses.
555 Thread* thread = Thread::current();
556 save_method = methodHandle(thread, task->method());
557
558 remove(task);
559 }
560 purge_stale_tasks(); // may temporarily release MCQ lock
561 return task;
562 }
563
564 // Clean & deallocate stale compile tasks.
565 // Temporarily releases MethodCompileQueue lock.
566 void CompileQueue::purge_stale_tasks() {
567 assert(_lock->owned_by_self(), "must own lock");
568 if (_first_stale != nullptr) {
569 // Stale tasks are purged when MCQ lock is released,
570 // but _first_stale updates are protected by MCQ lock.
571 // Once task processing starts and MCQ lock is released,
572 // other compiler threads can reuse _first_stale.
573 CompileTask* head = _first_stale;
574 _first_stale = nullptr;
575 {
576 MutexUnlocker ul(_lock);
577 for (CompileTask* task = head; task != nullptr; ) {
578 CompileTask* next_task = task->next();
579 CompileTaskWrapper ctw(task); // Frees the task
580 task->set_failure_reason("stale task");
581 task = next_task;
582 }
583 }
584 transfer_pending(); // transfer pending after reacquiring MCQ lock
585 }
586 }
587
588 void CompileQueue::remove(CompileTask* task) {
589 assert(_lock->owned_by_self(), "must own lock");
590 if (task->prev() != nullptr) {
591 task->prev()->set_next(task->next());
592 } else {
593 // max is the first element
594 assert(task == _first, "Sanity");
595 _first = task->next();
596 }
597
598 if (task->next() != nullptr) {
599 task->next()->set_prev(task->prev());
600 } else {
601 // max is the last element
602 assert(task == _last, "Sanity");
603 _last = task->prev();
604 }
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 (_c3_compile_queue != nullptr) {
661 _c3_compile_queue->print(st);
662 }
663 if (_ac1_compile_queue != nullptr) {
664 _ac1_compile_queue->print(st);
665 }
666 if (_ac2_compile_queue != nullptr) {
667 _ac2_compile_queue->print(st);
668 }
669 }
670
671 void CompileQueue::print(outputStream* st) {
672 assert_locked_or_safepoint(_lock);
673 st->print_cr("%s:", name());
674 CompileTask* task = _first;
675 if (task == nullptr) {
676 st->print_cr("Empty");
677 } else {
678 while (task != nullptr) {
679 task->print(st, nullptr, true, true);
680 task = task->next();
681 }
682 }
683 st->cr();
684 }
685
686 void CompileQueue::print_tty() {
687 stringStream ss;
688 // Dump the compile queue into a buffer before locking the tty
689 print(&ss);
690 {
691 ttyLocker ttyl;
692 tty->print("%s", ss.freeze());
693 }
694 }
695
696 CompilerCounters::CompilerCounters() {
697 _current_method[0] = '\0';
698 _compile_type = CompileBroker::no_compile;
699 }
700
701 #if INCLUDE_JFR && COMPILER2_OR_JVMCI
702 // It appends new compiler phase names to growable array phase_names(a new CompilerPhaseType mapping
703 // in compiler/compilerEvent.cpp) and registers it with its serializer.
704 //
705 // c2 uses explicit CompilerPhaseType idToPhase mapping in opto/phasetype.hpp,
706 // so if c2 is used, it should be always registered first.
707 // This function is called during vm initialization.
708 static void register_jfr_phasetype_serializer(CompilerType compiler_type) {
709 ResourceMark rm;
710 static bool first_registration = true;
711 if (compiler_type == compiler_jvmci) {
712 CompilerEvent::PhaseEvent::get_phase_id("NOT_A_PHASE_NAME", false, false, false);
713 first_registration = false;
714 #ifdef COMPILER2
715 } else if (compiler_type == compiler_c2) {
716 assert(first_registration, "invariant"); // c2 must be registered first.
717 for (int i = 0; i < PHASE_NUM_TYPES; i++) {
718 const char* phase_name = CompilerPhaseTypeHelper::to_description((CompilerPhaseType) i);
719 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
720 }
721 first_registration = false;
722 #endif // COMPILER2
723 }
724 }
725 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
726
727 // ------------------------------------------------------------------
728 // CompileBroker::compilation_init
729 //
730 // Initialize the Compilation object
731 void CompileBroker::compilation_init(JavaThread* THREAD) {
732 // No need to initialize compilation system if we do not use it.
733 if (!UseCompiler) {
734 return;
735 }
736 // Set the interface to the current compiler(s).
737 _c1_count = CompilationPolicy::c1_count();
738 _c2_count = CompilationPolicy::c2_count();
739 _c3_count = CompilationPolicy::c3_count();
740 _ac_count = CompilationPolicy::ac_count();
741
742 #if INCLUDE_JVMCI
743 if (EnableJVMCI) {
744 // This is creating a JVMCICompiler singleton.
745 JVMCICompiler* jvmci = new JVMCICompiler();
746
747 if (UseJVMCICompiler) {
748 _compilers[1] = jvmci;
749 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
750 if (BootstrapJVMCI) {
751 // JVMCI will bootstrap so give it more threads
752 _c2_count = MIN2(32, os::active_processor_count());
753 }
754 } else {
755 _c2_count = JVMCIThreads;
756 }
757 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
758 } else {
759 #ifdef COMPILER1
760 _c1_count = JVMCIHostThreads;
761 #endif // COMPILER1
762 }
763 #ifdef COMPILER2
764 if (AOTCodeCache::is_on() && (_c3_count > 0)) {
765 _compilers[2] = new C2Compiler();
766 }
767 #endif
768 }
769 }
770 #endif // INCLUDE_JVMCI
771
772 #ifdef COMPILER1
773 if (_c1_count > 0) {
774 _compilers[0] = new Compiler();
775 }
776 #endif // COMPILER1
777
778 #ifdef COMPILER2
779 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
780 if (_c2_count > 0) {
781 _compilers[1] = new C2Compiler();
782 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
783 // idToPhase mapping for c2 is in opto/phasetype.hpp
784 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
785 }
786 }
787 #endif // COMPILER2
788
789 #if INCLUDE_JVMCI
790 // Register after c2 registration.
791 // JVMCI CompilerPhaseType idToPhase mapping is dynamic.
792 if (EnableJVMCI) {
793 JFR_ONLY(register_jfr_phasetype_serializer(compiler_jvmci);)
794 }
795 #endif // INCLUDE_JVMCI
796
797 if (CompilerOracle::should_collect_memstat()) {
798 CompilationMemoryStatistic::initialize();
799 }
800
801 // Start the compiler thread(s)
802 init_compiler_threads();
803 // totalTime performance counter is always created as it is required
804 // by the implementation of java.lang.management.CompilationMXBean.
805 {
806 // Ensure OOM leads to vm_exit_during_initialization.
807 EXCEPTION_MARK;
808 _perf_total_compilation =
809 PerfDataManager::create_counter(JAVA_CI, "totalTime",
810 PerfData::U_Ticks, CHECK);
811 }
812
813 if (UsePerfData) {
814
815 EXCEPTION_MARK;
816
817 // create the jvmstat performance counters
818 _perf_osr_compilation =
819 PerfDataManager::create_counter(SUN_CI, "osrTime",
820 PerfData::U_Ticks, CHECK);
821
822 _perf_standard_compilation =
823 PerfDataManager::create_counter(SUN_CI, "standardTime",
824 PerfData::U_Ticks, CHECK);
825
826 _perf_total_bailout_count =
827 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
828 PerfData::U_Events, CHECK);
829
830 _perf_total_invalidated_count =
831 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
832 PerfData::U_Events, CHECK);
833
834 _perf_total_compile_count =
835 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
836 PerfData::U_Events, CHECK);
837 _perf_total_osr_compile_count =
838 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
839 PerfData::U_Events, CHECK);
840
841 _perf_total_standard_compile_count =
842 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
843 PerfData::U_Events, CHECK);
844
845 _perf_sum_osr_bytes_compiled =
846 PerfDataManager::create_counter(SUN_CI, "osrBytes",
847 PerfData::U_Bytes, CHECK);
848
849 _perf_sum_standard_bytes_compiled =
850 PerfDataManager::create_counter(SUN_CI, "standardBytes",
851 PerfData::U_Bytes, CHECK);
852
853 _perf_sum_nmethod_size =
854 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
855 PerfData::U_Bytes, CHECK);
856
857 _perf_sum_nmethod_code_size =
858 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
859 PerfData::U_Bytes, CHECK);
860
861 _perf_last_method =
862 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
863 CompilerCounters::cmname_buffer_length,
864 "", CHECK);
865
866 _perf_last_failed_method =
867 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
868 CompilerCounters::cmname_buffer_length,
869 "", CHECK);
870
871 _perf_last_invalidated_method =
872 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
873 CompilerCounters::cmname_buffer_length,
874 "", CHECK);
875
876 _perf_last_compile_type =
877 PerfDataManager::create_variable(SUN_CI, "lastType",
878 PerfData::U_None,
879 (jlong)CompileBroker::no_compile,
880 CHECK);
881
882 _perf_last_compile_size =
883 PerfDataManager::create_variable(SUN_CI, "lastSize",
884 PerfData::U_Bytes,
885 (jlong)CompileBroker::no_compile,
886 CHECK);
887
888
889 _perf_last_failed_type =
890 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
891 PerfData::U_None,
892 (jlong)CompileBroker::no_compile,
893 CHECK);
894
895 _perf_last_invalidated_type =
896 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
897 PerfData::U_None,
898 (jlong)CompileBroker::no_compile,
899 CHECK);
900 }
901
902 log_info(aot, codecache, init)("CompileBroker is initialized");
903 _initialized = true;
904 }
905
906 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
907 Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
908 return thread_oop;
909 }
910
911 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
912 CompilationPolicy::replay_training_at_init_loop(thread);
913 }
914
915 #if defined(ASSERT) && COMPILER2_OR_JVMCI
916 // Entry for DeoptimizeObjectsALotThread. The threads are started in
917 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
918 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
919 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
920 bool enter_single_loop;
921 {
922 MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
923 static int single_thread_count = 0;
924 enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
925 }
926 if (enter_single_loop) {
927 dt->deoptimize_objects_alot_loop_single();
928 } else {
929 dt->deoptimize_objects_alot_loop_all();
930 }
931 }
932
933 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
934 // barrier targets a single thread which is selected round robin.
935 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_single() {
936 HandleMark hm(this);
937 while (true) {
938 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *deoptee_thread = jtiwh.next(); ) {
939 { // Begin new scope for escape barrier
940 HandleMarkCleaner hmc(this);
941 ResourceMark rm(this);
942 EscapeBarrier eb(true, this, deoptee_thread);
943 eb.deoptimize_objects(100);
944 }
945 // Now sleep after the escape barriers destructor resumed deoptee_thread.
946 sleep(DeoptimizeObjectsALotInterval);
947 }
948 }
949 }
950
951 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
952 // barrier targets all java threads in the vm at once.
953 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_all() {
954 HandleMark hm(this);
955 while (true) {
956 { // Begin new scope for escape barrier
957 HandleMarkCleaner hmc(this);
958 ResourceMark rm(this);
959 EscapeBarrier eb(true, this);
960 eb.deoptimize_objects_all_threads();
961 }
962 // Now sleep after the escape barriers destructor resumed the java threads.
963 sleep(DeoptimizeObjectsALotInterval);
964 }
965 }
966 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
967
968
969 JavaThread* CompileBroker::make_thread(ThreadType type, jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, JavaThread* THREAD) {
970 Handle thread_oop(THREAD, JNIHandles::resolve_non_null(thread_handle));
971
972 if (java_lang_Thread::thread(thread_oop()) != nullptr) {
973 assert(type == compiler_t, "should only happen with reused compiler threads");
974 // The compiler thread hasn't actually exited yet so don't try to reuse it
975 return nullptr;
976 }
977
978 JavaThread* new_thread = nullptr;
979 switch (type) {
980 case compiler_t:
981 assert(comp != nullptr, "Compiler instance missing.");
982 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
983 CompilerCounters* counters = new CompilerCounters();
984 new_thread = new CompilerThread(queue, counters);
985 }
986 break;
987 #if defined(ASSERT) && COMPILER2_OR_JVMCI
988 case deoptimizer_t:
989 new_thread = new DeoptimizeObjectsALotThread();
990 break;
991 #endif // ASSERT
992 case training_replay_t:
993 new_thread = new TrainingReplayThread();
994 break;
995 default:
996 ShouldNotReachHere();
997 }
998
999 // At this point the new CompilerThread data-races with this startup
1000 // thread (which is the main thread and NOT the VM thread).
1001 // This means Java bytecodes being executed at startup can
1002 // queue compile jobs which will run at whatever default priority the
1003 // newly created CompilerThread runs at.
1004
1005
1006 // At this point it may be possible that no osthread was created for the
1007 // JavaThread due to lack of resources. We will handle that failure below.
1008 // Also check new_thread so that static analysis is happy.
1009 if (new_thread != nullptr && new_thread->osthread() != nullptr) {
1010
1011 if (type == compiler_t) {
1012 CompilerThread::cast(new_thread)->set_compiler(comp);
1013 }
1014
1015 // Note that we cannot call os::set_priority because it expects Java
1016 // priorities and we are *explicitly* using OS priorities so that it's
1017 // possible to set the compiler thread priority higher than any Java
1018 // thread.
1019
1020 int native_prio = CompilerThreadPriority;
1021 if (native_prio == -1) {
1022 if (UseCriticalCompilerThreadPriority) {
1023 native_prio = os::java_to_os_priority[CriticalPriority];
1024 } else {
1025 native_prio = os::java_to_os_priority[NearMaxPriority];
1026 }
1027 }
1028 os::set_native_priority(new_thread, native_prio);
1029
1030 // Note that this only sets the JavaThread _priority field, which by
1031 // definition is limited to Java priorities and not OS priorities.
1032 JavaThread::start_internal_daemon(THREAD, new_thread, thread_oop, NearMaxPriority);
1033
1034 } else { // osthread initialization failure
1035 if (UseDynamicNumberOfCompilerThreads && type == compiler_t
1036 && comp->num_compiler_threads() > 0) {
1037 // The new thread is not known to Thread-SMR yet so we can just delete.
1038 delete new_thread;
1039 return nullptr;
1040 } else {
1041 vm_exit_during_initialization("java.lang.OutOfMemoryError",
1042 os::native_thread_creation_failed_msg());
1043 }
1044 }
1045
1046 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
1047
1048 return new_thread;
1049 }
1050
1051 static bool trace_compiler_threads() {
1052 LogTarget(Debug, jit, thread) lt;
1053 return TraceCompilerThreads || lt.is_enabled();
1054 }
1055
1056 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1057 char name_buffer[256];
1058 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1059 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1060 return JNIHandles::make_global(thread_oop);
1061 }
1062
1063 static void print_compiler_threads(stringStream& msg) {
1064 if (TraceCompilerThreads) {
1065 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1066 }
1067 LogTarget(Debug, jit, thread) lt;
1068 if (lt.is_enabled()) {
1069 LogStream ls(lt);
1070 ls.print_cr("%s", msg.as_string());
1071 }
1072 }
1073
1074 static void print_compiler_thread(JavaThread *ct) {
1075 if (trace_compiler_threads()) {
1076 ResourceMark rm;
1077 ThreadsListHandle tlh; // name() depends on the TLH.
1078 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1079 stringStream msg;
1080 msg.print("Added initial compiler thread %s", ct->name());
1081 print_compiler_threads(msg);
1082 }
1083 }
1084
1085 void CompileBroker::init_compiler_threads() {
1086 // Ensure any exceptions lead to vm_exit_during_initialization.
1087 EXCEPTION_MARK;
1088 #if !defined(ZERO)
1089 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1090 #endif // !ZERO
1091 // Initialize the compilation queue
1092 if (_c2_count > 0) {
1093 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1094 _c2_compile_queue = new CompileQueue(name, MethodCompileQueueC2_lock);
1095 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1096 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1097 }
1098 if (_c1_count > 0) {
1099 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1100 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1101 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1102 }
1103
1104 if (_c3_count > 0) {
1105 const char* name = "C2 compile queue";
1106 _c3_compile_queue = new CompileQueue(name, MethodCompileQueueC3_lock);
1107 _compiler3_objects = NEW_C_HEAP_ARRAY(jobject, _c3_count, mtCompiler);
1108 _compiler3_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c3_count, mtCompiler);
1109 }
1110 if (_ac_count > 0) {
1111 if (_c1_count > 0) { // C1 is present
1112 _ac1_compile_queue = new CompileQueue("C1 AOT code compile queue", MethodCompileQueueSC1_lock);
1113 }
1114 if (_c2_count > 0) { // C2 is present
1115 _ac2_compile_queue = new CompileQueue("C2 AOT code compile queue", MethodCompileQueueSC2_lock);
1116 }
1117 _ac_objects = NEW_C_HEAP_ARRAY(jobject, _ac_count, mtCompiler);
1118 _ac_logs = NEW_C_HEAP_ARRAY(CompileLog*, _ac_count, mtCompiler);
1119 }
1120 char name_buffer[256];
1121
1122 for (int i = 0; i < _c2_count; i++) {
1123 // Create a name for our thread.
1124 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1125 _compiler2_objects[i] = thread_handle;
1126 _compiler2_logs[i] = nullptr;
1127
1128 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1129 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1130 assert(ct != nullptr, "should have been handled for initial thread");
1131 _compilers[1]->set_num_compiler_threads(i + 1);
1132 print_compiler_thread(ct);
1133 }
1134 }
1135
1136 for (int i = 0; i < _c1_count; i++) {
1137 // Create a name for our thread.
1138 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1139 _compiler1_objects[i] = thread_handle;
1140 _compiler1_logs[i] = nullptr;
1141
1142 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1143 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1144 assert(ct != nullptr, "should have been handled for initial thread");
1145 _compilers[0]->set_num_compiler_threads(i + 1);
1146 print_compiler_thread(ct);
1147 }
1148 }
1149
1150 for (int i = 0; i < _c3_count; i++) {
1151 // Create a name for our thread.
1152 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C2 CompilerThread%d", i);
1153 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1154 jobject thread_handle = JNIHandles::make_global(thread_oop);
1155 _compiler3_objects[i] = thread_handle;
1156 _compiler3_logs[i] = nullptr;
1157
1158 JavaThread *ct = make_thread(compiler_t, thread_handle, _c3_compile_queue, _compilers[2], THREAD);
1159 assert(ct != nullptr, "should have been handled for initial thread");
1160 _compilers[2]->set_num_compiler_threads(i + 1);
1161 print_compiler_thread(ct);
1162 }
1163
1164 if (_ac_count > 0) {
1165 int i = 0;
1166 if (_c1_count > 0) { // C1 is present
1167 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 1);
1168 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1169 jobject thread_handle = JNIHandles::make_global(thread_oop);
1170 _ac_objects[i] = thread_handle;
1171 _ac_logs[i] = nullptr;
1172 i++;
1173
1174 JavaThread *ct = make_thread(compiler_t, thread_handle, _ac1_compile_queue, _compilers[0], THREAD);
1175 assert(ct != nullptr, "should have been handled for initial thread");
1176 print_compiler_thread(ct);
1177 }
1178 if (_c2_count > 0) { // C2 is present
1179 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 2);
1180 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1181 jobject thread_handle = JNIHandles::make_global(thread_oop);
1182 _ac_objects[i] = thread_handle;
1183 _ac_logs[i] = nullptr;
1184
1185 JavaThread *ct = make_thread(compiler_t, thread_handle, _ac2_compile_queue, _compilers[1], THREAD);
1186 assert(ct != nullptr, "should have been handled for initial thread");
1187 print_compiler_thread(ct);
1188 }
1189 }
1190
1191 if (UsePerfData) {
1192 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count + _c3_count, CHECK);
1193 }
1194
1195 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1196 if (DeoptimizeObjectsALot) {
1197 // Initialize and start the object deoptimizer threads
1198 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1199 for (int count = 0; count < total_count; count++) {
1200 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1201 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1202 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1203 }
1204 }
1205 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1206 }
1207
1208 void CompileBroker::init_training_replay() {
1209 // Ensure any exceptions lead to vm_exit_during_initialization.
1210 EXCEPTION_MARK;
1211 if (TrainingData::have_data()) {
1212 Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1213 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1214 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1215 }
1216 }
1217
1218 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1219
1220 int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1221 const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1222
1223 // Quick check if we already have enough compiler threads without taking the lock.
1224 // Numbers may change concurrently, so we read them again after we have the lock.
1225 if (_c2_compile_queue != nullptr) {
1226 old_c2_count = get_c2_thread_count();
1227 new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1228 }
1229 if (_c1_compile_queue != nullptr) {
1230 old_c1_count = get_c1_thread_count();
1231 new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1232 }
1233 if (new_c2_count <= old_c2_count && new_c1_count <= old_c1_count) return;
1234
1235 // Now, we do the more expensive operations.
1236 julong free_memory = os::free_memory();
1237 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
1238 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
1239 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
1240
1241 // Only attempt to start additional threads if the lock is free.
1242 if (!CompileThread_lock->try_lock()) return;
1243
1244 if (_c2_compile_queue != nullptr) {
1245 old_c2_count = get_c2_thread_count();
1246 new_c2_count = MIN4(_c2_count,
1247 _c2_compile_queue->size() / c2_tasks_per_thread,
1248 (int)(free_memory / (200*M)),
1249 (int)(available_cc_np / (128*K)));
1250
1251 for (int i = old_c2_count; i < new_c2_count; i++) {
1252 #if INCLUDE_JVMCI
1253 if (UseJVMCICompiler && !UseJVMCINativeLibrary && _compiler2_objects[i] == nullptr) {
1254 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread objects as their
1255 // existence is completely hidden from the rest of the VM (and those compiler threads can't
1256 // call Java code to do the creation anyway).
1257 //
1258 // For pure Java JVMCI we have to create new j.l.Thread objects as they are visible and we
1259 // can see unexpected thread lifecycle transitions if we bind them to new JavaThreads. For
1260 // native library JVMCI it's preferred to use the C1/C2 strategy as this avoids unnecessary
1261 // coupling with Java.
1262 if (!THREAD->can_call_java()) break;
1263 char name_buffer[256];
1264 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", _compilers[1]->name(), i);
1265 Handle thread_oop;
1266 {
1267 // We have to give up the lock temporarily for the Java calls.
1268 MutexUnlocker mu(CompileThread_lock);
1269 thread_oop = JavaThread::create_system_thread_object(name_buffer, THREAD);
1270 }
1271 if (HAS_PENDING_EXCEPTION) {
1272 if (trace_compiler_threads()) {
1273 ResourceMark rm;
1274 stringStream msg;
1275 msg.print_cr("JVMCI compiler thread creation failed:");
1276 PENDING_EXCEPTION->print_on(&msg);
1277 print_compiler_threads(msg);
1278 }
1279 CLEAR_PENDING_EXCEPTION;
1280 break;
1281 }
1282 // Check if another thread has beaten us during the Java calls.
1283 if (get_c2_thread_count() != i) break;
1284 jobject thread_handle = JNIHandles::make_global(thread_oop);
1285 assert(compiler2_object(i) == nullptr, "Old one must be released!");
1286 _compiler2_objects[i] = thread_handle;
1287 }
1288 #endif
1289 guarantee(compiler2_object(i) != nullptr, "Thread oop must exist");
1290 JavaThread *ct = make_thread(compiler_t, compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD);
1291 if (ct == nullptr) break;
1292 _compilers[1]->set_num_compiler_threads(i + 1);
1293 if (trace_compiler_threads()) {
1294 ResourceMark rm;
1295 ThreadsListHandle tlh; // name() depends on the TLH.
1296 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1297 stringStream msg;
1298 msg.print("Added compiler thread %s (free memory: %dMB, available non-profiled code cache: %dMB)",
1299 ct->name(), (int)(free_memory/M), (int)(available_cc_np/M));
1300 print_compiler_threads(msg);
1301 }
1302 }
1303 }
1304
1305 if (_c1_compile_queue != nullptr) {
1306 old_c1_count = get_c1_thread_count();
1307 new_c1_count = MIN4(_c1_count,
1308 _c1_compile_queue->size() / c1_tasks_per_thread,
1309 (int)(free_memory / (100*M)),
1310 (int)(available_cc_p / (128*K)));
1311
1312 for (int i = old_c1_count; i < new_c1_count; i++) {
1313 JavaThread *ct = make_thread(compiler_t, compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD);
1314 if (ct == nullptr) break;
1315 _compilers[0]->set_num_compiler_threads(i + 1);
1316 if (trace_compiler_threads()) {
1317 ResourceMark rm;
1318 ThreadsListHandle tlh; // name() depends on the TLH.
1319 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1320 stringStream msg;
1321 msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1322 ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1323 print_compiler_threads(msg);
1324 }
1325 }
1326 }
1327
1328 CompileThread_lock->unlock();
1329 }
1330
1331
1332 /**
1333 * Set the methods on the stack as on_stack so that redefine classes doesn't
1334 * reclaim them. This method is executed at a safepoint.
1335 */
1336 void CompileBroker::mark_on_stack() {
1337 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1338 // Since we are at a safepoint, we do not need a lock to access
1339 // the compile queues.
1340 if (_c3_compile_queue != nullptr) {
1341 _c3_compile_queue->mark_on_stack();
1342 }
1343 if (_c2_compile_queue != nullptr) {
1344 _c2_compile_queue->mark_on_stack();
1345 }
1346 if (_c1_compile_queue != nullptr) {
1347 _c1_compile_queue->mark_on_stack();
1348 }
1349 if (_ac1_compile_queue != nullptr) {
1350 _ac1_compile_queue->mark_on_stack();
1351 }
1352 if (_ac2_compile_queue != nullptr) {
1353 _ac2_compile_queue->mark_on_stack();
1354 }
1355 }
1356
1357 // ------------------------------------------------------------------
1358 // CompileBroker::compile_method
1359 //
1360 // Request compilation of a method.
1361 void CompileBroker::compile_method_base(const methodHandle& method,
1362 int osr_bci,
1363 int comp_level,
1364 int hot_count,
1365 CompileTask::CompileReason compile_reason,
1366 bool requires_online_compilation,
1367 bool blocking,
1368 Thread* thread) {
1369 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1370 assert(method->method_holder()->is_instance_klass(),
1371 "sanity check");
1372 assert(!method->method_holder()->is_not_initialized() ||
1373 compile_reason == CompileTask::Reason_Preload ||
1374 compile_reason == CompileTask::Reason_Precompile ||
1375 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1376 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1377
1378 if (CIPrintRequests) {
1379 tty->print("request: ");
1380 method->print_short_name(tty);
1381 if (osr_bci != InvocationEntryBci) {
1382 tty->print(" osr_bci: %d", osr_bci);
1383 }
1384 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1385 if (hot_count > 0) {
1386 tty->print(" hot: yes");
1387 }
1388 tty->cr();
1389 }
1390
1391 // A request has been made for compilation. Before we do any
1392 // real work, check to see if the method has been compiled
1393 // in the meantime with a definitive result.
1394 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1395 return;
1396 }
1397
1398 #ifndef PRODUCT
1399 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1400 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1401 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1402 return;
1403 }
1404 }
1405 #endif
1406
1407 // If this method is already in the compile queue, then
1408 // we do not block the current thread.
1409 if (compilation_is_in_queue(method)) {
1410 // We may want to decay our counter a bit here to prevent
1411 // multiple denied requests for compilation. This is an
1412 // open compilation policy issue. Note: The other possibility,
1413 // in the case that this is a blocking compile request, is to have
1414 // all subsequent blocking requesters wait for completion of
1415 // ongoing compiles. Note that in this case we'll need a protocol
1416 // for freeing the associated compile tasks. [Or we could have
1417 // a single static monitor on which all these waiters sleep.]
1418 return;
1419 }
1420
1421 // Tiered policy requires MethodCounters to exist before adding a method to
1422 // the queue. Create if we don't have them yet.
1423 if (compile_reason != CompileTask::Reason_Preload) {
1424 method->get_method_counters(thread);
1425 }
1426
1427 AOTCodeEntry* aot_code_entry = find_aot_code_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1428 bool is_aot = (aot_code_entry != nullptr);
1429
1430 // Outputs from the following MutexLocker block:
1431 CompileTask* task = nullptr;
1432 CompileQueue* queue;
1433 #if INCLUDE_JVMCI
1434 if (is_c2_compile(comp_level) && compiler2()->is_jvmci() && compiler3() != nullptr &&
1435 ((JVMCICompiler*)compiler2())->force_comp_at_level_simple(method)) {
1436 assert(_c3_compile_queue != nullptr, "sanity");
1437 queue = _c3_compile_queue; // JVMCI compiler's methods compilation
1438 } else
1439 #endif
1440 queue = compile_queue(comp_level, is_aot);
1441
1442 // Acquire our lock.
1443 {
1444 ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1445
1446 // Make sure the method has not slipped into the queues since
1447 // last we checked; note that those checks were "fast bail-outs".
1448 // Here we need to be more careful, see 14012000 below.
1449 if (compilation_is_in_queue(method)) {
1450 return;
1451 }
1452
1453 // We need to check again to see if the compilation has
1454 // completed. A previous compilation may have registered
1455 // some result.
1456 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1457 return;
1458 }
1459
1460 // We now know that this compilation is not pending, complete,
1461 // or prohibited. Assign a compile_id to this compilation
1462 // and check to see if it is in our [Start..Stop) range.
1463 int compile_id = assign_compile_id(method, osr_bci);
1464 if (compile_id == 0) {
1465 // The compilation falls outside the allowed range.
1466 return;
1467 }
1468
1469 #if INCLUDE_JVMCI
1470 if (UseJVMCICompiler && blocking) {
1471 // Don't allow blocking compiles for requests triggered by JVMCI.
1472 if (thread->is_Compiler_thread()) {
1473 blocking = false;
1474 }
1475
1476 // In libjvmci, JVMCI initialization should not deadlock with other threads
1477 if (!UseJVMCINativeLibrary) {
1478 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1479 vframeStream vfst(JavaThread::cast(thread));
1480 for (; !vfst.at_end(); vfst.next()) {
1481 if (vfst.method()->is_static_initializer() ||
1482 (vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass()) &&
1483 vfst.method()->name() == vmSymbols::loadClass_name())) {
1484 blocking = false;
1485 break;
1486 }
1487 }
1488
1489 // Don't allow blocking compilation requests to JVMCI
1490 // if JVMCI itself is not yet initialized
1491 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1492 blocking = false;
1493 }
1494 }
1495
1496 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1497 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1498 // such as the DestroyJavaVM thread.
1499 if (JVMCI::in_shutdown()) {
1500 blocking = false;
1501 }
1502 }
1503 #endif // INCLUDE_JVMCI
1504
1505 // We will enter the compilation in the queue.
1506 // 14012000: Note that this sets the queued_for_compile bits in
1507 // the target method. We can now reason that a method cannot be
1508 // queued for compilation more than once, as follows:
1509 // Before a thread queues a task for compilation, it first acquires
1510 // the compile queue lock, then checks if the method's queued bits
1511 // are set or it has already been compiled. Thus there can not be two
1512 // instances of a compilation task for the same method on the
1513 // compilation queue. Consider now the case where the compilation
1514 // thread has already removed a task for that method from the queue
1515 // and is in the midst of compiling it. In this case, the
1516 // queued_for_compile bits must be set in the method (and these
1517 // will be visible to the current thread, since the bits were set
1518 // under protection of the compile queue lock, which we hold now.
1519 // When the compilation completes, the compiler thread first sets
1520 // the compilation result and then clears the queued_for_compile
1521 // bits. Neither of these actions are protected by a barrier (or done
1522 // under the protection of a lock), so the only guarantee we have
1523 // (on machines with TSO (Total Store Order)) is that these values
1524 // will update in that order. As a result, the only combinations of
1525 // these bits that the current thread will see are, in temporal order:
1526 // <RESULT, QUEUE> :
1527 // <0, 1> : in compile queue, but not yet compiled
1528 // <1, 1> : compiled but queue bit not cleared
1529 // <1, 0> : compiled and queue bit cleared
1530 // Because we first check the queue bits then check the result bits,
1531 // we are assured that we cannot introduce a duplicate task.
1532 // Note that if we did the tests in the reverse order (i.e. check
1533 // result then check queued bit), we could get the result bit before
1534 // the compilation completed, and the queue bit after the compilation
1535 // completed, and end up introducing a "duplicate" (redundant) task.
1536 // In that case, the compiler thread should first check if a method
1537 // has already been compiled before trying to compile it.
1538 // NOTE: in the event that there are multiple compiler threads and
1539 // there is de-optimization/recompilation, things will get hairy,
1540 // and in that case it's best to protect both the testing (here) of
1541 // these bits, and their updating (here and elsewhere) under a
1542 // common lock.
1543 task = create_compile_task(queue,
1544 compile_id, method,
1545 osr_bci, comp_level,
1546 hot_count, aot_code_entry, compile_reason,
1547 requires_online_compilation, blocking);
1548
1549 if (task->is_aot() && (_ac_count > 0)) {
1550 // Put it on AOT code caching queue
1551 queue = is_c1_compile(comp_level) ? _ac1_compile_queue : _ac2_compile_queue;
1552 }
1553
1554 if (UseLockFreeCompileQueues) {
1555 assert(queue->lock()->owned_by_self() == false, "");
1556 queue->add_pending(task);
1557 } else {
1558 queue->add(task);
1559 }
1560 }
1561
1562 if (blocking) {
1563 wait_for_completion(task);
1564 }
1565 }
1566
1567 AOTCodeEntry* CompileBroker::find_aot_code_entry(const methodHandle& method, int osr_bci, int comp_level,
1568 CompileTask::CompileReason compile_reason,
1569 bool requires_online_compilation) {
1570 AOTCodeEntry* aot_code_entry = nullptr;
1571 if (osr_bci == InvocationEntryBci && !requires_online_compilation && AOTCodeCache::is_on_for_use()) {
1572 // Check for cached code.
1573 if (compile_reason == CompileTask::Reason_Preload) {
1574 aot_code_entry = method->aot_code_entry();
1575 assert(aot_code_entry != nullptr && aot_code_entry->for_preload(), "sanity");
1576 } else {
1577 aot_code_entry = AOTCodeCache::find_code_entry(method, comp_level);
1578 }
1579 }
1580 return aot_code_entry;
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 TRAPS) {
1589 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1590 if (!_initialized || comp_level == CompLevel_none) {
1591 return nullptr;
1592 }
1593
1594 #if INCLUDE_JVMCI
1595 if (EnableJVMCI && UseJVMCICompiler &&
1596 comp_level == CompLevel_full_optimization && !AOTLinkedClassBulkLoader::class_preloading_finished()) {
1597 return nullptr;
1598 }
1599 #endif
1600
1601 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1602 assert(comp != nullptr, "Ensure we have a compiler");
1603
1604 #if INCLUDE_JVMCI
1605 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1606 // JVMCI compilation is not yet initializable.
1607 return nullptr;
1608 }
1609 #endif
1610
1611 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1612 // CompileBroker::compile_method can trap and can have pending async exception.
1613 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1614 DirectivesStack::release(directive);
1615 return nm;
1616 }
1617
1618 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1619 int comp_level,
1620 int hot_count,
1621 bool requires_online_compilation,
1622 CompileTask::CompileReason compile_reason,
1623 DirectiveSet* directive,
1624 TRAPS) {
1625
1626 // make sure arguments make sense
1627 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1628 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1629 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1630 assert(!method->method_holder()->is_not_initialized() ||
1631 compile_reason == CompileTask::Reason_Preload ||
1632 compile_reason == CompileTask::Reason_Precompile ||
1633 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1634 // return quickly if possible
1635
1636 if (PrecompileOnlyAndExit && !CompileTask::reason_is_precompiled(compile_reason)) {
1637 return nullptr;
1638 }
1639
1640 // lock, make sure that the compilation
1641 // isn't prohibited in a straightforward way.
1642 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1643 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1644 return nullptr;
1645 }
1646
1647 if (osr_bci == InvocationEntryBci) {
1648 // standard compilation
1649 nmethod* method_code = method->code();
1650 if (method_code != nullptr) {
1651 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1652 return method_code;
1653 }
1654 }
1655 if (method->is_not_compilable(comp_level)) {
1656 return nullptr;
1657 }
1658 } else {
1659 // osr compilation
1660 // We accept a higher level osr method
1661 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1662 if (nm != nullptr) return nm;
1663 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1664 }
1665
1666 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1667 // some prerequisites that are compiler specific
1668 if (compile_reason != CompileTask::Reason_Preload &&
1669 !CompileTask::reason_is_precompiled(compile_reason) &&
1670 (comp->is_c2() || comp->is_jvmci())) {
1671 InternalOOMEMark iom(THREAD);
1672 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1673 // Resolve all classes seen in the signature of the method
1674 // we are compiling.
1675 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1676 }
1677
1678 // If the method is native, do the lookup in the thread requesting
1679 // the compilation. Native lookups can load code, which is not
1680 // permitted during compilation.
1681 //
1682 // Note: A native method implies non-osr compilation which is
1683 // checked with an assertion at the entry of this method.
1684 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1685 address adr = NativeLookup::lookup(method, THREAD);
1686 if (HAS_PENDING_EXCEPTION) {
1687 // In case of an exception looking up the method, we just forget
1688 // about it. The interpreter will kick-in and throw the exception.
1689 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1690 CLEAR_PENDING_EXCEPTION;
1691 return nullptr;
1692 }
1693 assert(method->has_native_function(), "must have native code by now");
1694 }
1695
1696 // RedefineClasses() has replaced this method; just return
1697 if (method->is_old()) {
1698 return nullptr;
1699 }
1700
1701 // JVMTI -- post_compile_event requires jmethod_id() that may require
1702 // a lock the compiling thread can not acquire. Prefetch it here.
1703 if (JvmtiExport::should_post_compiled_method_load()) {
1704 method->jmethod_id();
1705 }
1706
1707 // do the compilation
1708 if (method->is_native()) {
1709 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1710 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1711 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1712 //
1713 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1714 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1715 AdapterHandlerLibrary::create_native_wrapper(method);
1716 } else {
1717 return nullptr;
1718 }
1719 } else {
1720 // If the compiler is shut off due to code cache getting full
1721 // fail out now so blocking compiles dont hang the java thread
1722 if (!should_compile_new_jobs()) {
1723 return nullptr;
1724 }
1725 bool is_blocking = ReplayCompiles ||
1726 !directive->BackgroundCompilationOption ||
1727 (PreloadBlocking && (compile_reason == CompileTask::Reason_Preload));
1728 compile_method_base(method, osr_bci, comp_level, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1729 }
1730
1731 // return requested nmethod
1732 // We accept a higher level osr method
1733 if (osr_bci == InvocationEntryBci) {
1734 return method->code();
1735 }
1736 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1737 }
1738
1739
1740 // ------------------------------------------------------------------
1741 // CompileBroker::compilation_is_complete
1742 //
1743 // See if compilation of this method is already complete.
1744 bool CompileBroker::compilation_is_complete(Method* method,
1745 int osr_bci,
1746 int comp_level,
1747 bool online_only,
1748 CompileTask::CompileReason compile_reason) {
1749 if (compile_reason == CompileTask::Reason_Precompile ||
1750 compile_reason == CompileTask::Reason_PrecompileForPreload) {
1751 return false; // FIXME: any restrictions?
1752 }
1753 bool is_osr = (osr_bci != standard_entry_bci);
1754 if (is_osr) {
1755 if (method->is_not_osr_compilable(comp_level)) {
1756 return true;
1757 } else {
1758 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1759 return (result != nullptr);
1760 }
1761 } else {
1762 if (method->is_not_compilable(comp_level)) {
1763 return true;
1764 } else {
1765 nmethod* result = method->code();
1766 if (result == nullptr) {
1767 return false;
1768 }
1769 if (online_only && result->is_aot()) {
1770 return false;
1771 }
1772 bool same_level = (comp_level == result->comp_level());
1773 if (result->has_clinit_barriers()) {
1774 return !same_level; // Allow replace preloaded code with new code of the same level
1775 }
1776 return same_level;
1777 }
1778 }
1779 }
1780
1781
1782 /**
1783 * See if this compilation is already requested.
1784 *
1785 * Implementation note: there is only a single "is in queue" bit
1786 * for each method. This means that the check below is overly
1787 * conservative in the sense that an osr compilation in the queue
1788 * will block a normal compilation from entering the queue (and vice
1789 * versa). This can be remedied by a full queue search to disambiguate
1790 * cases. If it is deemed profitable, this may be done.
1791 */
1792 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1793 return method->queued_for_compilation();
1794 }
1795
1796 // ------------------------------------------------------------------
1797 // CompileBroker::compilation_is_prohibited
1798 //
1799 // See if this compilation is not allowed.
1800 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1801 bool is_native = method->is_native();
1802 // Some compilers may not support the compilation of natives.
1803 AbstractCompiler *comp = compiler(comp_level);
1804 if (is_native && (!CICompileNatives || comp == nullptr)) {
1805 method->set_not_compilable_quietly("native methods not supported", comp_level);
1806 return true;
1807 }
1808
1809 bool is_osr = (osr_bci != standard_entry_bci);
1810 // Some compilers may not support on stack replacement.
1811 if (is_osr && (!CICompileOSR || comp == nullptr)) {
1812 method->set_not_osr_compilable("OSR not supported", comp_level);
1813 return true;
1814 }
1815
1816 // The method may be explicitly excluded by the user.
1817 double scale;
1818 if (excluded || (CompilerOracle::has_option_value(method, CompileCommandEnum::CompileThresholdScaling, scale) && scale == 0)) {
1819 bool quietly = CompilerOracle::be_quiet();
1820 if (PrintCompilation && !quietly) {
1821 // This does not happen quietly...
1822 ResourceMark rm;
1823 tty->print("### Excluding %s:%s",
1824 method->is_native() ? "generation of native wrapper" : "compile",
1825 (method->is_static() ? " static" : ""));
1826 method->print_short_name(tty);
1827 tty->cr();
1828 }
1829 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1830 }
1831
1832 return false;
1833 }
1834
1835 /**
1836 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1837 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1838 * The function also allows to generate separate compilation IDs for OSR compilations.
1839 */
1840 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1841 #ifdef ASSERT
1842 bool is_osr = (osr_bci != standard_entry_bci);
1843 int id;
1844 if (method->is_native()) {
1845 assert(!is_osr, "can't be osr");
1846 // Adapters, native wrappers and method handle intrinsics
1847 // should be generated always.
1848 return Atomic::add(CICountNative ? &_native_compilation_id : &_compilation_id, 1);
1849 } else if (CICountOSR && is_osr) {
1850 id = Atomic::add(&_osr_compilation_id, 1);
1851 if (CIStartOSR <= id && id < CIStopOSR) {
1852 return id;
1853 }
1854 } else {
1855 id = Atomic::add(&_compilation_id, 1);
1856 if (CIStart <= id && id < CIStop) {
1857 return id;
1858 }
1859 }
1860
1861 // Method was not in the appropriate compilation range.
1862 method->set_not_compilable_quietly("Not in requested compile id range");
1863 return 0;
1864 #else
1865 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1866 // only _compilation_id is incremented.
1867 return Atomic::add(&_compilation_id, 1);
1868 #endif
1869 }
1870
1871 // ------------------------------------------------------------------
1872 // CompileBroker::assign_compile_id_unlocked
1873 //
1874 // Public wrapper for assign_compile_id that acquires the needed locks
1875 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1876 return assign_compile_id(method, osr_bci);
1877 }
1878
1879 // ------------------------------------------------------------------
1880 // CompileBroker::create_compile_task
1881 //
1882 // Create a CompileTask object representing the current request for
1883 // compilation. Add this task to the queue.
1884 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1885 int compile_id,
1886 const methodHandle& method,
1887 int osr_bci,
1888 int comp_level,
1889 int hot_count,
1890 AOTCodeEntry* aot_code_entry,
1891 CompileTask::CompileReason compile_reason,
1892 bool requires_online_compilation,
1893 bool blocking) {
1894 CompileTask* new_task = new CompileTask(compile_id, method, osr_bci, comp_level,
1895 hot_count, aot_code_entry, compile_reason, queue,
1896 requires_online_compilation, blocking);
1897 return new_task;
1898 }
1899
1900 #if INCLUDE_JVMCI
1901 // The number of milliseconds to wait before checking if
1902 // JVMCI compilation has made progress.
1903 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1904
1905 // The number of JVMCI compilation progress checks that must fail
1906 // before unblocking a thread waiting for a blocking compilation.
1907 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1908
1909 /**
1910 * Waits for a JVMCI compiler to complete a given task. This thread
1911 * waits until either the task completes or it sees no JVMCI compilation
1912 * progress for N consecutive milliseconds where N is
1913 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1914 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1915 *
1916 * @return true if this thread needs to delete the task
1917 */
1918 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1919 assert(UseJVMCICompiler, "sanity");
1920 MonitorLocker ml(thread, CompileTaskWait_lock);
1921 int progress_wait_attempts = 0;
1922 jint thread_jvmci_compilation_ticks = 0;
1923 jint global_jvmci_compilation_ticks = jvmci->global_compilation_ticks();
1924 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1925 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1926 JVMCICompileState* jvmci_compile_state = task->blocking_jvmci_compile_state();
1927
1928 bool progress;
1929 if (jvmci_compile_state != nullptr) {
1930 jint ticks = jvmci_compile_state->compilation_ticks();
1931 progress = (ticks - thread_jvmci_compilation_ticks) != 0;
1932 JVMCI_event_1("waiting on compilation %d [ticks=%d]", task->compile_id(), ticks);
1933 thread_jvmci_compilation_ticks = ticks;
1934 } else {
1935 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1936 // that all JVMCI compiler threads are blocked on. We use the global JVMCI
1937 // compilation ticks to determine whether JVMCI compilation
1938 // is still making progress through the JVMCI compiler queue.
1939 jint ticks = jvmci->global_compilation_ticks();
1940 progress = (ticks - global_jvmci_compilation_ticks) != 0;
1941 JVMCI_event_1("waiting on compilation %d to be queued [ticks=%d]", task->compile_id(), ticks);
1942 global_jvmci_compilation_ticks = ticks;
1943 }
1944
1945 if (!progress) {
1946 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1947 if (PrintCompilation) {
1948 task->print(tty, "wait for blocking compilation timed out");
1949 }
1950 JVMCI_event_1("waiting on compilation %d timed out", task->compile_id());
1951 break;
1952 }
1953 } else {
1954 progress_wait_attempts = 0;
1955 }
1956 }
1957 task->clear_waiter();
1958 return task->is_complete();
1959 }
1960 #endif
1961
1962 /**
1963 * Wait for the compilation task to complete.
1964 */
1965 void CompileBroker::wait_for_completion(CompileTask* task) {
1966 if (CIPrintCompileQueue) {
1967 ttyLocker ttyl;
1968 tty->print_cr("BLOCKING FOR COMPILE");
1969 }
1970
1971 assert(task->is_blocking(), "can only wait on blocking task");
1972
1973 JavaThread* thread = JavaThread::current();
1974
1975 methodHandle method(thread, task->method());
1976 bool free_task;
1977 #if INCLUDE_JVMCI
1978 AbstractCompiler* comp = compiler(task->comp_level());
1979 if (!UseJVMCINativeLibrary && comp->is_jvmci() && !task->should_wait_for_compilation()) {
1980 // It may return before compilation is completed.
1981 // Note that libjvmci should not pre-emptively unblock
1982 // a thread waiting for a compilation as it does not call
1983 // Java code and so is not deadlock prone like jarjvmci.
1984 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1985 } else
1986 #endif
1987 {
1988 MonitorLocker ml(thread, CompileTaskWait_lock);
1989 free_task = true;
1990 task->inc_waiting_for_completion();
1991 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1992 ml.wait();
1993 }
1994 task->dec_waiting_for_completion();
1995 }
1996
1997 if (free_task) {
1998 if (is_compilation_disabled_forever()) {
1999 delete task;
2000 return;
2001 }
2002
2003 // It is harmless to check this status without the lock, because
2004 // completion is a stable property (until the task object is deleted).
2005 assert(task->is_complete(), "Compilation should have completed");
2006
2007 // By convention, the waiter is responsible for deleting a
2008 // blocking CompileTask. Since there is only one waiter ever
2009 // waiting on a CompileTask, we know that no one else will
2010 // be using this CompileTask; we can delete it.
2011 delete task;
2012 }
2013 }
2014
2015 void CompileBroker::wait_for_no_active_tasks() {
2016 CompileTask::wait_for_no_active_tasks();
2017 }
2018
2019 /**
2020 * Initialize compiler thread(s) + compiler object(s). The postcondition
2021 * of this function is that the compiler runtimes are initialized and that
2022 * compiler threads can start compiling.
2023 */
2024 bool CompileBroker::init_compiler_runtime() {
2025 CompilerThread* thread = CompilerThread::current();
2026 AbstractCompiler* comp = thread->compiler();
2027 // Final sanity check - the compiler object must exist
2028 guarantee(comp != nullptr, "Compiler object must exist");
2029
2030 {
2031 // Must switch to native to allocate ci_env
2032 ThreadToNativeFromVM ttn(thread);
2033 ciEnv ci_env((CompileTask*)nullptr);
2034 // Cache Jvmti state
2035 ci_env.cache_jvmti_state();
2036 // Cache DTrace flags
2037 ci_env.cache_dtrace_flags();
2038
2039 // Switch back to VM state to do compiler initialization
2040 ThreadInVMfromNative tv(thread);
2041
2042 comp->initialize();
2043 }
2044
2045 if (comp->is_failed()) {
2046 disable_compilation_forever();
2047 // If compiler initialization failed, no compiler thread that is specific to a
2048 // particular compiler runtime will ever start to compile methods.
2049 shutdown_compiler_runtime(comp, thread);
2050 return false;
2051 }
2052
2053 // C1 specific check
2054 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2055 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2056 return false;
2057 }
2058
2059 return true;
2060 }
2061
2062 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2063 BufferBlob* blob = thread->get_buffer_blob();
2064 if (blob != nullptr) {
2065 blob->purge();
2066 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2067 CodeCache::free(blob);
2068 }
2069 }
2070
2071 /**
2072 * If C1 and/or C2 initialization failed, we shut down all compilation.
2073 * We do this to keep things simple. This can be changed if it ever turns
2074 * out to be a problem.
2075 */
2076 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2077 free_buffer_blob_if_allocated(thread);
2078
2079 log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2080
2081 if (comp->should_perform_shutdown()) {
2082 // There are two reasons for shutting down the compiler
2083 // 1) compiler runtime initialization failed
2084 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2085 warning("%s initialization failed. Shutting down all compilers", comp->name());
2086
2087 // Only one thread per compiler runtime object enters here
2088 // Set state to shut down
2089 comp->set_shut_down();
2090
2091 // Delete all queued compilation tasks to make compiler threads exit faster.
2092 if (_c1_compile_queue != nullptr) {
2093 _c1_compile_queue->delete_all();
2094 }
2095
2096 if (_c2_compile_queue != nullptr) {
2097 _c2_compile_queue->delete_all();
2098 }
2099
2100 if (_c3_compile_queue != nullptr) {
2101 _c3_compile_queue->delete_all();
2102 }
2103
2104 // Set flags so that we continue execution with using interpreter only.
2105 UseCompiler = false;
2106 UseInterpreter = true;
2107
2108 // We could delete compiler runtimes also. However, there are references to
2109 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
2110 // fail. This can be done later if necessary.
2111 }
2112 }
2113
2114 /**
2115 * Helper function to create new or reuse old CompileLog.
2116 */
2117 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2118 if (!LogCompilation) return nullptr;
2119
2120 AbstractCompiler *compiler = ct->compiler();
2121 bool jvmci = JVMCI_ONLY( compiler->is_jvmci() ||) false;
2122 bool c1 = compiler->is_c1();
2123 jobject* compiler_objects = c1 ? _compiler1_objects : (_c3_count == 0 ? _compiler2_objects : (jvmci ? _compiler2_objects : _compiler3_objects));
2124 assert(compiler_objects != nullptr, "must be initialized at this point");
2125 CompileLog** logs = c1 ? _compiler1_logs : (_c3_count == 0 ? _compiler2_logs : (jvmci ? _compiler2_logs : _compiler3_logs));
2126 assert(logs != nullptr, "must be initialized at this point");
2127 int count = c1 ? _c1_count : (_c3_count == 0 ? _c2_count : (jvmci ? _c2_count : _c3_count));
2128
2129 if (ct->queue() == _ac1_compile_queue || ct->queue() == _ac2_compile_queue) {
2130 compiler_objects = _ac_objects;
2131 logs = _ac_logs;
2132 count = _ac_count;
2133 }
2134 // Find Compiler number by its threadObj.
2135 oop compiler_obj = ct->threadObj();
2136 int compiler_number = 0;
2137 bool found = false;
2138 for (; compiler_number < count; compiler_number++) {
2139 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2140 found = true;
2141 break;
2142 }
2143 }
2144 assert(found, "Compiler must exist at this point");
2145
2146 // Determine pointer for this thread's log.
2147 CompileLog** log_ptr = &logs[compiler_number];
2148
2149 // Return old one if it exists.
2150 CompileLog* log = *log_ptr;
2151 if (log != nullptr) {
2152 ct->init_log(log);
2153 return log;
2154 }
2155
2156 // Create a new one and remember it.
2157 init_compiler_thread_log();
2158 log = ct->log();
2159 *log_ptr = log;
2160 return log;
2161 }
2162
2163 // ------------------------------------------------------------------
2164 // CompileBroker::compiler_thread_loop
2165 //
2166 // The main loop run by a CompilerThread.
2167 void CompileBroker::compiler_thread_loop() {
2168 CompilerThread* thread = CompilerThread::current();
2169 CompileQueue* queue = thread->queue();
2170 // For the thread that initializes the ciObjectFactory
2171 // this resource mark holds all the shared objects
2172 ResourceMark rm;
2173
2174 // First thread to get here will initialize the compiler interface
2175
2176 {
2177 ASSERT_IN_VM;
2178 MutexLocker only_one (thread, CompileThread_lock);
2179 if (!ciObjectFactory::is_initialized()) {
2180 ciObjectFactory::initialize();
2181 }
2182 }
2183
2184 // Open a log.
2185 CompileLog* log = get_log(thread);
2186 if (log != nullptr) {
2187 log->begin_elem("start_compile_thread name='%s' thread='%zu' process='%d'",
2188 thread->name(),
2189 os::current_thread_id(),
2190 os::current_process_id());
2191 log->stamp();
2192 log->end_elem();
2193 }
2194
2195 // If compiler thread/runtime initialization fails, exit the compiler thread
2196 if (!init_compiler_runtime()) {
2197 return;
2198 }
2199
2200 thread->start_idle_timer();
2201
2202 // Poll for new compilation tasks as long as the JVM runs. Compilation
2203 // should only be disabled if something went wrong while initializing the
2204 // compiler runtimes. This, in turn, should not happen. The only known case
2205 // when compiler runtime initialization fails is if there is not enough free
2206 // space in the code cache to generate the necessary stubs, etc.
2207 while (!is_compilation_disabled_forever()) {
2208 // We need this HandleMark to avoid leaking VM handles.
2209 HandleMark hm(thread);
2210
2211 RecompilationPolicy::recompilation_step(AOTRecompilationWorkUnitSize, thread);
2212
2213 CompileTask* task = queue->get(thread);
2214 if (task == nullptr) {
2215 if (UseDynamicNumberOfCompilerThreads) {
2216 // Access compiler_count under lock to enforce consistency.
2217 MutexLocker only_one(CompileThread_lock);
2218 if (can_remove(thread, true)) {
2219 if (trace_compiler_threads()) {
2220 ResourceMark rm;
2221 stringStream msg;
2222 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2223 thread->name(), thread->idle_time_millis());
2224 print_compiler_threads(msg);
2225 }
2226
2227 // Notify compiler that the compiler thread is about to stop
2228 thread->compiler()->stopping_compiler_thread(thread);
2229
2230 free_buffer_blob_if_allocated(thread);
2231 return; // Stop this thread.
2232 }
2233 }
2234 } else {
2235 // Assign the task to the current thread. Mark this compilation
2236 // thread as active for the profiler.
2237 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2238 // occurs after fetching the compile task off the queue.
2239 CompileTaskWrapper ctw(task);
2240 methodHandle method(thread, task->method());
2241
2242 // Never compile a method if breakpoints are present in it
2243 if (method()->number_of_breakpoints() == 0) {
2244 // Compile the method.
2245 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2246 invoke_compiler_on_method(task);
2247 thread->start_idle_timer();
2248 } else {
2249 // After compilation is disabled, remove remaining methods from queue
2250 method->clear_queued_for_compilation();
2251 method->set_pending_queue_processed(false);
2252 task->set_failure_reason("compilation is disabled");
2253 }
2254 } else {
2255 task->set_failure_reason("breakpoints are present");
2256 }
2257
2258 if (UseDynamicNumberOfCompilerThreads) {
2259 possibly_add_compiler_threads(thread);
2260 assert(!thread->has_pending_exception(), "should have been handled");
2261 }
2262 }
2263 }
2264
2265 // Shut down compiler runtime
2266 shutdown_compiler_runtime(thread->compiler(), thread);
2267 }
2268
2269 // ------------------------------------------------------------------
2270 // CompileBroker::init_compiler_thread_log
2271 //
2272 // Set up state required by +LogCompilation.
2273 void CompileBroker::init_compiler_thread_log() {
2274 CompilerThread* thread = CompilerThread::current();
2275 char file_name[4*K];
2276 FILE* fp = nullptr;
2277 intx thread_id = os::current_thread_id();
2278 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
2279 const char* dir = (try_temp_dir ? os::get_temp_directory() : nullptr);
2280 if (dir == nullptr) {
2281 jio_snprintf(file_name, sizeof(file_name), "hs_c%zu_pid%u.log",
2282 thread_id, os::current_process_id());
2283 } else {
2284 jio_snprintf(file_name, sizeof(file_name),
2285 "%s%shs_c%zu_pid%u.log", dir,
2286 os::file_separator(), thread_id, os::current_process_id());
2287 }
2288
2289 fp = os::fopen(file_name, "wt");
2290 if (fp != nullptr) {
2291 if (LogCompilation && Verbose) {
2292 tty->print_cr("Opening compilation log %s", file_name);
2293 }
2294 CompileLog* log = new(mtCompiler) CompileLog(file_name, fp, thread_id);
2295 if (log == nullptr) {
2296 fclose(fp);
2297 return;
2298 }
2299 thread->init_log(log);
2300
2301 if (xtty != nullptr) {
2302 ttyLocker ttyl;
2303 // Record any per thread log files
2304 xtty->elem("thread_logfile thread='%zd' filename='%s'", thread_id, file_name);
2305 }
2306 return;
2307 }
2308 }
2309 warning("Cannot open log file: %s", file_name);
2310 }
2311
2312 void CompileBroker::log_metaspace_failure() {
2313 const char* message = "some methods may not be compiled because metaspace "
2314 "is out of memory";
2315 if (CompilationLog::log() != nullptr) {
2316 CompilationLog::log()->log_metaspace_failure(message);
2317 }
2318 if (PrintCompilation) {
2319 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
2320 }
2321 }
2322
2323
2324 // ------------------------------------------------------------------
2325 // CompileBroker::set_should_block
2326 //
2327 // Set _should_block.
2328 // Call this from the VM, with Threads_lock held and a safepoint requested.
2329 void CompileBroker::set_should_block() {
2330 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
2331 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
2332 #ifndef PRODUCT
2333 if (PrintCompilation && (Verbose || WizardMode))
2334 tty->print_cr("notifying compiler thread pool to block");
2335 #endif
2336 _should_block = true;
2337 }
2338
2339 // ------------------------------------------------------------------
2340 // CompileBroker::maybe_block
2341 //
2342 // Call this from the compiler at convenient points, to poll for _should_block.
2343 void CompileBroker::maybe_block() {
2344 if (_should_block) {
2345 #ifndef PRODUCT
2346 if (PrintCompilation && (Verbose || WizardMode))
2347 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
2348 #endif
2349 // If we are executing a task during the request to block, report the task
2350 // before disappearing.
2351 CompilerThread* thread = CompilerThread::current();
2352 if (thread != nullptr) {
2353 CompileTask* task = thread->task();
2354 if (task != nullptr) {
2355 if (PrintCompilation) {
2356 task->print(tty, "blocked");
2357 }
2358 task->print_ul("blocked");
2359 }
2360 }
2361 // Go to VM state and block for final VM shutdown safepoint.
2362 ThreadInVMfromNative tivfn(JavaThread::current());
2363 assert(false, "Should never unblock from TIVNM entry");
2364 }
2365 }
2366
2367 // wrapper for CodeCache::print_summary()
2368 static void codecache_print(bool detailed)
2369 {
2370 stringStream s;
2371 // Dump code cache into a buffer before locking the tty,
2372 {
2373 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2374 CodeCache::print_summary(&s, detailed);
2375 }
2376 ttyLocker ttyl;
2377 tty->print("%s", s.freeze());
2378 }
2379
2380 // wrapper for CodeCache::print_summary() using outputStream
2381 static void codecache_print(outputStream* out, bool detailed) {
2382 stringStream s;
2383
2384 // Dump code cache into a buffer
2385 {
2386 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2387 CodeCache::print_summary(&s, detailed);
2388 }
2389
2390 char* remaining_log = s.as_string();
2391 while (*remaining_log != '\0') {
2392 char* eol = strchr(remaining_log, '\n');
2393 if (eol == nullptr) {
2394 out->print_cr("%s", remaining_log);
2395 remaining_log = remaining_log + strlen(remaining_log);
2396 } else {
2397 *eol = '\0';
2398 out->print_cr("%s", remaining_log);
2399 remaining_log = eol + 1;
2400 }
2401 }
2402 }
2403
2404 void CompileBroker::handle_compile_error(CompilerThread* thread, CompileTask* task, ciEnv* ci_env,
2405 int compilable, const char* failure_reason) {
2406 if (!AbortVMOnCompilationFailure) {
2407 return;
2408 }
2409 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
2410 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
2411 }
2412 if (compilable == ciEnv::MethodCompilable_never) {
2413 fatal("Never compilable: %s", failure_reason);
2414 }
2415 }
2416
2417 static void post_compilation_event(EventCompilation& event, CompileTask* task) {
2418 assert(task != nullptr, "invariant");
2419 CompilerEvent::CompilationEvent::post(event,
2420 task->compile_id(),
2421 task->compiler()->type(),
2422 task->method(),
2423 task->comp_level(),
2424 task->is_success(),
2425 task->osr_bci() != CompileBroker::standard_entry_bci,
2426 task->nm_total_size(),
2427 task->num_inlined_bytecodes(),
2428 task->arena_bytes());
2429 }
2430
2431 int DirectivesStack::_depth = 0;
2432 CompilerDirectives* DirectivesStack::_top = nullptr;
2433 CompilerDirectives* DirectivesStack::_bottom = nullptr;
2434
2435 // Acquires Compilation_lock and waits for it to be notified
2436 // as long as WhiteBox::compilation_locked is true.
2437 static void whitebox_lock_compilation() {
2438 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2439 while (WhiteBox::compilation_locked) {
2440 locker.wait();
2441 }
2442 }
2443
2444 // ------------------------------------------------------------------
2445 // CompileBroker::invoke_compiler_on_method
2446 //
2447 // Compile a method.
2448 //
2449 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2450 task->print_ul();
2451 elapsedTimer time;
2452
2453 DirectiveSet* directive = task->directive();
2454
2455 CompilerThread* thread = CompilerThread::current();
2456 ResourceMark rm(thread);
2457
2458 if (CompilationLog::log() != nullptr) {
2459 CompilationLog::log()->log_compile(thread, task);
2460 }
2461
2462 // Common flags.
2463 int compile_id = task->compile_id();
2464 int osr_bci = task->osr_bci();
2465 bool is_osr = (osr_bci != standard_entry_bci);
2466 bool should_log = (thread->log() != nullptr);
2467 bool should_break = false;
2468 bool should_print_compilation = PrintCompilation || directive->PrintCompilationOption;
2469 const int task_level = task->comp_level();
2470 AbstractCompiler* comp = task->compiler();
2471 {
2472 // create the handle inside it's own block so it can't
2473 // accidentally be referenced once the thread transitions to
2474 // native. The NoHandleMark before the transition should catch
2475 // any cases where this occurs in the future.
2476 methodHandle method(thread, task->method());
2477
2478 assert(!method->is_native(), "no longer compile natives");
2479
2480 // Update compile information when using perfdata.
2481 if (UsePerfData) {
2482 update_compile_perf_data(thread, method, is_osr);
2483 }
2484
2485 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2486 }
2487
2488 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2489 if (should_log && !directive->LogOption) {
2490 should_log = false;
2491 }
2492
2493 // Allocate a new set of JNI handles.
2494 JNIHandleMark jhm(thread);
2495 Method* target_handle = task->method();
2496 int compilable = ciEnv::MethodCompilable;
2497 const char* failure_reason = nullptr;
2498 bool failure_reason_on_C_heap = false;
2499 const char* retry_message = nullptr;
2500
2501 #if INCLUDE_JVMCI
2502 if (UseJVMCICompiler && comp != nullptr && comp->is_jvmci()) {
2503 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2504
2505 TraceTime t1("compilation", &time);
2506 EventCompilation event;
2507 JVMCICompileState compile_state(task, jvmci);
2508 JVMCIRuntime *runtime = nullptr;
2509
2510 if (JVMCI::in_shutdown()) {
2511 failure_reason = "in JVMCI shutdown";
2512 retry_message = "not retryable";
2513 compilable = ciEnv::MethodCompilable_never;
2514 } else if (compile_state.target_method_is_old()) {
2515 // Skip redefined methods
2516 failure_reason = "redefined method";
2517 retry_message = "not retryable";
2518 compilable = ciEnv::MethodCompilable_never;
2519 } else {
2520 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2521 if (env.init_error() != JNI_OK) {
2522 const char* msg = env.init_error_msg();
2523 failure_reason = os::strdup(err_msg("Error attaching to libjvmci (err: %d, %s)",
2524 env.init_error(), msg == nullptr ? "unknown" : msg), mtJVMCI);
2525 bool reason_on_C_heap = true;
2526 // In case of JNI_ENOMEM, there's a good chance a subsequent attempt to create libjvmci or attach to it
2527 // might succeed. Other errors most likely indicate a non-recoverable error in the JVMCI runtime.
2528 bool retryable = env.init_error() == JNI_ENOMEM;
2529 compile_state.set_failure(retryable, failure_reason, reason_on_C_heap);
2530 }
2531 if (failure_reason == nullptr) {
2532 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2533 // Must switch to native to block
2534 ThreadToNativeFromVM ttn(thread);
2535 whitebox_lock_compilation();
2536 }
2537 methodHandle method(thread, target_handle);
2538 runtime = env.runtime();
2539 runtime->compile_method(&env, jvmci, method, osr_bci);
2540
2541 failure_reason = compile_state.failure_reason();
2542 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2543 if (!compile_state.retryable()) {
2544 retry_message = "not retryable";
2545 compilable = ciEnv::MethodCompilable_not_at_tier;
2546 }
2547 if (!task->is_success()) {
2548 assert(failure_reason != nullptr, "must specify failure_reason");
2549 }
2550 }
2551 }
2552 if (!task->is_success() && !JVMCI::in_shutdown()) {
2553 handle_compile_error(thread, task, nullptr, compilable, failure_reason);
2554 }
2555 if (event.should_commit()) {
2556 post_compilation_event(event, task);
2557 }
2558
2559 if (runtime != nullptr) {
2560 runtime->post_compile(thread);
2561 }
2562 } else
2563 #endif // INCLUDE_JVMCI
2564 {
2565 NoHandleMark nhm;
2566 ThreadToNativeFromVM ttn(thread);
2567
2568 ciEnv ci_env(task);
2569 if (should_break) {
2570 ci_env.set_break_at_compile(true);
2571 }
2572 if (should_log) {
2573 ci_env.set_log(thread->log());
2574 }
2575 assert(thread->env() == &ci_env, "set by ci_env");
2576 // The thread-env() field is cleared in ~CompileTaskWrapper.
2577
2578 // Cache Jvmti state
2579 bool method_is_old = ci_env.cache_jvmti_state();
2580
2581 // Skip redefined methods
2582 if (method_is_old) {
2583 ci_env.record_method_not_compilable("redefined method", true);
2584 }
2585
2586 // Cache DTrace flags
2587 ci_env.cache_dtrace_flags();
2588
2589 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2590
2591 TraceTime t1("compilation", &time);
2592 EventCompilation event;
2593
2594 if (comp == nullptr) {
2595 ci_env.record_method_not_compilable("no compiler");
2596 } else if (!ci_env.failing()) {
2597 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2598 whitebox_lock_compilation();
2599 }
2600 comp->compile_method(&ci_env, target, osr_bci, true, directive);
2601
2602 /* Repeat compilation without installing code for profiling purposes */
2603 int repeat_compilation_count = directive->RepeatCompilationOption;
2604 while (repeat_compilation_count > 0) {
2605 ResourceMark rm(thread);
2606 task->print_ul("NO CODE INSTALLED");
2607 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2608 repeat_compilation_count--;
2609 }
2610 }
2611
2612
2613 if (!ci_env.failing() && !task->is_success() && !task->is_precompiled()) {
2614 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2615 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2616 // The compiler elected, without comment, not to register a result.
2617 // Do not attempt further compilations of this method.
2618 ci_env.record_method_not_compilable("compile failed");
2619 }
2620
2621 // Copy this bit to the enclosing block:
2622 compilable = ci_env.compilable();
2623
2624 if (ci_env.failing()) {
2625 // Duplicate the failure reason string, so that it outlives ciEnv
2626 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2627 failure_reason_on_C_heap = true;
2628 retry_message = ci_env.retry_message();
2629 ci_env.report_failure(failure_reason);
2630 }
2631
2632 if (ci_env.failing()) {
2633 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2634 }
2635 if (event.should_commit()) {
2636 post_compilation_event(event, task);
2637 }
2638 }
2639
2640 if (failure_reason != nullptr) {
2641 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2642 if (CompilationLog::log() != nullptr) {
2643 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2644 }
2645 if (PrintCompilation || directive->PrintCompilationOption) {
2646 FormatBufferResource msg = retry_message != nullptr ?
2647 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2648 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2649 task->print(tty, msg);
2650 }
2651 }
2652
2653 task->mark_finished(os::elapsed_counter());
2654 DirectivesStack::release(directive);
2655
2656 methodHandle method(thread, task->method());
2657
2658 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2659
2660 collect_statistics(thread, time, task);
2661
2662 if (PrintCompilation && PrintCompilation2) {
2663 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2664 tty->print("%4d ", compile_id); // print compilation number
2665 tty->print("%s ", (is_osr ? "%" : (task->is_aot() ? "A" : " ")));
2666 if (task->is_success()) {
2667 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2668 }
2669 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2670 }
2671
2672 Log(compilation, codecache) log;
2673 if (log.is_debug()) {
2674 LogStream ls(log.debug());
2675 codecache_print(&ls, /* detailed= */ false);
2676 }
2677 if (PrintCodeCacheOnCompilation) {
2678 codecache_print(/* detailed= */ false);
2679 }
2680 // Disable compilation, if required.
2681 switch (compilable) {
2682 case ciEnv::MethodCompilable_never:
2683 if (is_osr)
2684 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2685 else
2686 method->set_not_compilable_quietly("MethodCompilable_never");
2687 break;
2688 case ciEnv::MethodCompilable_not_at_tier:
2689 if (is_osr)
2690 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2691 else
2692 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2693 break;
2694 }
2695
2696 // Note that the queued_for_compilation bits are cleared without
2697 // protection of a mutex. [They were set by the requester thread,
2698 // when adding the task to the compile queue -- at which time the
2699 // compile queue lock was held. Subsequently, we acquired the compile
2700 // queue lock to get this task off the compile queue; thus (to belabour
2701 // the point somewhat) our clearing of the bits must be occurring
2702 // only after the setting of the bits. See also 14012000 above.
2703 method->clear_queued_for_compilation();
2704 method->set_pending_queue_processed(false);
2705
2706 if (should_print_compilation) {
2707 ResourceMark rm;
2708 task->print_tty();
2709 }
2710 }
2711
2712 /**
2713 * The CodeCache is full. Print warning and disable compilation.
2714 * Schedule code cache cleaning so compilation can continue later.
2715 * This function needs to be called only from CodeCache::allocate(),
2716 * since we currently handle a full code cache uniformly.
2717 */
2718 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2719 UseInterpreter = true;
2720 if (UseCompiler || AlwaysCompileLoopMethods ) {
2721 if (xtty != nullptr) {
2722 stringStream s;
2723 // Dump code cache state into a buffer before locking the tty,
2724 // because log_state() will use locks causing lock conflicts.
2725 CodeCache::log_state(&s);
2726 // Lock to prevent tearing
2727 ttyLocker ttyl;
2728 xtty->begin_elem("code_cache_full");
2729 xtty->print("%s", s.freeze());
2730 xtty->stamp();
2731 xtty->end_elem();
2732 }
2733
2734 #ifndef PRODUCT
2735 if (ExitOnFullCodeCache) {
2736 codecache_print(/* detailed= */ true);
2737 before_exit(JavaThread::current());
2738 exit_globals(); // will delete tty
2739 vm_direct_exit(1);
2740 }
2741 #endif
2742 if (UseCodeCacheFlushing) {
2743 // Since code cache is full, immediately stop new compiles
2744 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2745 log_info(codecache)("Code cache is full - disabling compilation");
2746 }
2747 } else {
2748 disable_compilation_forever();
2749 }
2750
2751 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2752 }
2753 }
2754
2755 // ------------------------------------------------------------------
2756 // CompileBroker::update_compile_perf_data
2757 //
2758 // Record this compilation for debugging purposes.
2759 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2760 ResourceMark rm;
2761 char* method_name = method->name()->as_C_string();
2762 char current_method[CompilerCounters::cmname_buffer_length];
2763 size_t maxLen = CompilerCounters::cmname_buffer_length;
2764
2765 const char* class_name = method->method_holder()->name()->as_C_string();
2766
2767 size_t s1len = strlen(class_name);
2768 size_t s2len = strlen(method_name);
2769
2770 // check if we need to truncate the string
2771 if (s1len + s2len + 2 > maxLen) {
2772
2773 // the strategy is to lop off the leading characters of the
2774 // class name and the trailing characters of the method name.
2775
2776 if (s2len + 2 > maxLen) {
2777 // lop of the entire class name string, let snprintf handle
2778 // truncation of the method name.
2779 class_name += s1len; // null string
2780 }
2781 else {
2782 // lop off the extra characters from the front of the class name
2783 class_name += ((s1len + s2len + 2) - maxLen);
2784 }
2785 }
2786
2787 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2788
2789 int last_compile_type = normal_compile;
2790 if (CICountOSR && is_osr) {
2791 last_compile_type = osr_compile;
2792 } else if (CICountNative && method->is_native()) {
2793 last_compile_type = native_compile;
2794 }
2795
2796 CompilerCounters* counters = thread->counters();
2797 counters->set_current_method(current_method);
2798 counters->set_compile_type((jlong) last_compile_type);
2799 }
2800
2801 // ------------------------------------------------------------------
2802 // CompileBroker::collect_statistics
2803 //
2804 // Collect statistics about the compilation.
2805
2806 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2807 bool success = task->is_success();
2808 methodHandle method (thread, task->method());
2809 int compile_id = task->compile_id();
2810 bool is_osr = (task->osr_bci() != standard_entry_bci);
2811 const int comp_level = task->comp_level();
2812 CompilerCounters* counters = thread->counters();
2813
2814 MutexLocker locker(CompileStatistics_lock);
2815
2816 // _perf variables are production performance counters which are
2817 // updated regardless of the setting of the CITime and CITimeEach flags
2818 //
2819
2820 // account all time, including bailouts and failures in this counter;
2821 // C1 and C2 counters are counting both successful and unsuccessful compiles
2822 _t_total_compilation.add(&time);
2823
2824 // Update compilation times. Used by the implementation of JFR CompilerStatistics
2825 // and java.lang.management.CompilationMXBean.
2826 _perf_total_compilation->inc(time.ticks());
2827 _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2828
2829 if (!success) {
2830 _total_bailout_count++;
2831 if (UsePerfData) {
2832 _perf_last_failed_method->set_value(counters->current_method());
2833 _perf_last_failed_type->set_value(counters->compile_type());
2834 _perf_total_bailout_count->inc();
2835 }
2836 _t_bailedout_compilation.add(&time);
2837
2838 if (CITime || log_is_enabled(Info, init)) {
2839 CompilerStatistics* stats = nullptr;
2840 if (task->is_aot()) {
2841 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2842 stats = &_aot_stats_per_level[level];
2843 } else {
2844 stats = &_stats_per_level[comp_level-1];
2845 }
2846 stats->_bailout.update(time, 0);
2847 }
2848 } else if (!task->is_success()) {
2849 if (UsePerfData) {
2850 _perf_last_invalidated_method->set_value(counters->current_method());
2851 _perf_last_invalidated_type->set_value(counters->compile_type());
2852 _perf_total_invalidated_count->inc();
2853 }
2854 _total_invalidated_count++;
2855 _t_invalidated_compilation.add(&time);
2856
2857 if (CITime || log_is_enabled(Info, init)) {
2858 CompilerStatistics* stats = nullptr;
2859 if (task->is_aot()) {
2860 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2861 stats = &_aot_stats_per_level[level];
2862 } else {
2863 stats = &_stats_per_level[comp_level-1];
2864 }
2865 stats->_invalidated.update(time, 0);
2866 }
2867 } else {
2868 // Compilation succeeded
2869 if (CITime || log_is_enabled(Info, init)) {
2870 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2871 if (is_osr) {
2872 _t_osr_compilation.add(&time);
2873 _sum_osr_bytes_compiled += bytes_compiled;
2874 } else {
2875 _t_standard_compilation.add(&time);
2876 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2877 }
2878
2879 // Collect statistic per compilation level
2880 if (task->is_aot()) {
2881 _aot_stats._standard.update(time, bytes_compiled);
2882 _aot_stats._nmethods_size += task->nm_total_size();
2883 _aot_stats._nmethods_code_size += task->nm_insts_size();
2884 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2885 CompilerStatistics* stats = &_aot_stats_per_level[level];
2886 stats->_standard.update(time, bytes_compiled);
2887 stats->_nmethods_size += task->nm_total_size();
2888 stats->_nmethods_code_size += task->nm_insts_size();
2889 } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2890 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2891 if (is_osr) {
2892 stats->_osr.update(time, bytes_compiled);
2893 } else {
2894 stats->_standard.update(time, bytes_compiled);
2895 }
2896 stats->_nmethods_size += task->nm_total_size();
2897 stats->_nmethods_code_size += task->nm_insts_size();
2898 } else {
2899 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2900 }
2901
2902 // Collect statistic per compiler
2903 AbstractCompiler* comp = task->compiler();
2904 if (comp && !task->is_aot()) {
2905 CompilerStatistics* stats = comp->stats();
2906 if (is_osr) {
2907 stats->_osr.update(time, bytes_compiled);
2908 } else {
2909 stats->_standard.update(time, bytes_compiled);
2910 }
2911 stats->_nmethods_size += task->nm_total_size();
2912 stats->_nmethods_code_size += task->nm_insts_size();
2913 } else if (!task->is_aot()) { // if (!comp)
2914 assert(false, "Compiler object must exist");
2915 }
2916 }
2917
2918 if (UsePerfData) {
2919 // save the name of the last method compiled
2920 _perf_last_method->set_value(counters->current_method());
2921 _perf_last_compile_type->set_value(counters->compile_type());
2922 _perf_last_compile_size->set_value(method->code_size() +
2923 task->num_inlined_bytecodes());
2924 if (is_osr) {
2925 _perf_osr_compilation->inc(time.ticks());
2926 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2927 } else {
2928 _perf_standard_compilation->inc(time.ticks());
2929 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2930 }
2931 }
2932
2933 if (CITimeEach) {
2934 double compile_time = time.seconds();
2935 double bytes_per_sec = compile_time == 0.0 ? 0.0 : (double)(method->code_size() + task->num_inlined_bytecodes()) / compile_time;
2936 tty->print_cr("%3d seconds: %6.3f bytes/sec : %f (bytes %d + %d inlined)",
2937 compile_id, compile_time, bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2938 }
2939
2940 // Collect counts of successful compilations
2941 _sum_nmethod_size += task->nm_total_size();
2942 _sum_nmethod_code_size += task->nm_insts_size();
2943 _total_compile_count++;
2944
2945 if (UsePerfData) {
2946 _perf_sum_nmethod_size->inc( task->nm_total_size());
2947 _perf_sum_nmethod_code_size->inc(task->nm_insts_size());
2948 _perf_total_compile_count->inc();
2949 }
2950
2951 if (is_osr) {
2952 if (UsePerfData) _perf_total_osr_compile_count->inc();
2953 _total_osr_compile_count++;
2954 } else {
2955 if (UsePerfData) _perf_total_standard_compile_count->inc();
2956 _total_standard_compile_count++;
2957 }
2958 }
2959 // set the current method for the thread to null
2960 if (UsePerfData) counters->set_current_method("");
2961 }
2962
2963 const char* CompileBroker::compiler_name(int comp_level) {
2964 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2965 if (comp == nullptr) {
2966 return "no compiler";
2967 } else {
2968 return (comp->name());
2969 }
2970 }
2971
2972 jlong CompileBroker::total_compilation_ticks() {
2973 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2974 }
2975
2976 void CompileBroker::log_not_entrant(nmethod* nm) {
2977 _total_not_entrant_count++;
2978 if (CITime || log_is_enabled(Info, init)) {
2979 CompilerStatistics* stats = nullptr;
2980 int level = nm->comp_level();
2981 if (nm->is_aot()) {
2982 if (nm->preloaded()) {
2983 assert(level == CompLevel_full_optimization, "%d", level);
2984 level = CompLevel_full_optimization + 1;
2985 }
2986 stats = &_aot_stats_per_level[level - 1];
2987 } else {
2988 stats = &_stats_per_level[level - 1];
2989 }
2990 stats->_made_not_entrant._count++;
2991 }
2992 }
2993
2994 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2995 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}",
2996 name, stats->bytes_per_second(),
2997 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2998 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2999 stats->_nmethods_size, stats->_nmethods_code_size);
3000 }
3001
3002 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
3003 if (data._count > 0) {
3004 st->print("; %s: %4u methods", name, data._count);
3005 if (print_time) {
3006 st->print(" (in %.3fs)", data._time.seconds());
3007 }
3008 }
3009 }
3010
3011 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
3012 st->print(" %s%d: %5u methods", prefix, tier, stats->_standard._count);
3013 if (stats->_standard._count > 0) {
3014 st->print(" (in %.3fs)", stats->_standard._time.seconds());
3015 }
3016 print_helper(st, "osr", stats->_osr);
3017 print_helper(st, "bailout", stats->_bailout);
3018 print_helper(st, "invalid", stats->_invalidated);
3019 print_helper(st, "not_entrant", stats->_made_not_entrant, false);
3020 st->cr();
3021 }
3022
3023 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3024 if (queue != nullptr) {
3025 MutexLocker ml(queue->lock());
3026
3027 uint total_cnt = 0;
3028 uint active_cnt = 0;
3029 for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3030 guarantee(jt != nullptr, "");
3031 if (jt->is_Compiler_thread()) {
3032 CompilerThread* ct = (CompilerThread*)jt;
3033
3034 guarantee(ct != nullptr, "");
3035 if (ct->queue() == queue) {
3036 ++total_cnt;
3037 CompileTask* task = ct->task();
3038 if (task != nullptr) {
3039 ++active_cnt;
3040 }
3041 }
3042 }
3043 }
3044
3045 st->print(" %s (%d active / %d total threads): %u tasks",
3046 queue->name(), active_cnt, total_cnt, queue->size());
3047 if (queue->size() > 0) {
3048 uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3049 for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3050 int tier = task->comp_level();
3051 if (task->is_aot() && task->preload()) {
3052 assert(tier == CompLevel_full_optimization, "%d", tier);
3053 tier = CompLevel_full_optimization + 1;
3054 }
3055 counts[tier-1]++;
3056 }
3057 st->print(":");
3058 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3059 uint cnt = counts[tier-1];
3060 if (cnt > 0) {
3061 st->print(" T%d: %u tasks;", tier, cnt);
3062 }
3063 }
3064 }
3065 st->cr();
3066
3067 // for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3068 // guarantee(jt != nullptr, "");
3069 // if (jt->is_Compiler_thread()) {
3070 // CompilerThread* ct = (CompilerThread*)jt;
3071 //
3072 // guarantee(ct != nullptr, "");
3073 // if (ct->queue() == queue) {
3074 // ResourceMark rm;
3075 // CompileTask* task = ct->task();
3076 // st->print(" %s: ", ct->name_raw());
3077 // if (task != nullptr) {
3078 // task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3079 // }
3080 // st->cr();
3081 // }
3082 // }
3083 // }
3084 }
3085 }
3086 void CompileBroker::print_statistics_on(outputStream* st) {
3087 st->print_cr(" Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3088 _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3089 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3090 print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3091 }
3092 st->cr();
3093
3094 if (AOTCodeCaching) {
3095 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3096 if (tier != CompLevel_full_profile) {
3097 print_tier_helper(st, "AOT Code T", tier, &_aot_stats_per_level[tier - 1]);
3098 }
3099 }
3100 st->cr();
3101 }
3102
3103 print_queue_info(st, _c1_compile_queue);
3104 print_queue_info(st, _c2_compile_queue);
3105 print_queue_info(st, _c3_compile_queue);
3106 print_queue_info(st, _ac1_compile_queue);
3107 print_queue_info(st, _ac2_compile_queue);
3108 }
3109
3110 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3111 if (per_compiler) {
3112 if (aggregate) {
3113 tty->cr();
3114 tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3115 tty->print_cr("------------------------------------------------");
3116 tty->cr();
3117 }
3118 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3119 AbstractCompiler* comp = _compilers[i];
3120 if (comp != nullptr) {
3121 print_times(comp->name(), comp->stats());
3122 }
3123 }
3124 if (_aot_stats._standard._count > 0) {
3125 print_times("SC", &_aot_stats);
3126 }
3127 if (aggregate) {
3128 tty->cr();
3129 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3130 tty->print_cr("------------------------------------------------");
3131 tty->cr();
3132 }
3133 char tier_name[256];
3134 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3135 CompilerStatistics* stats = &_stats_per_level[tier-1];
3136 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3137 print_times(tier_name, stats);
3138 }
3139 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3140 CompilerStatistics* stats = &_aot_stats_per_level[tier-1];
3141 if (stats->_standard._bytes > 0) {
3142 os::snprintf_checked(tier_name, sizeof(tier_name), "AOT Code T%d", tier);
3143 print_times(tier_name, stats);
3144 }
3145 }
3146 }
3147
3148 if (!aggregate) {
3149 return;
3150 }
3151
3152 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3153 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3154 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3155
3156 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3157 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3158
3159 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3160 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3161 uint total_compile_count = CompileBroker::_total_compile_count;
3162 uint total_bailout_count = CompileBroker::_total_bailout_count;
3163 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3164
3165 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
3166 uint nmethods_size = CompileBroker::_sum_nmethod_size;
3167
3168 tty->cr();
3169 tty->print_cr("Accumulated compiler times");
3170 tty->print_cr("----------------------------------------------------------");
3171 //0000000000111111111122222222223333333333444444444455555555556666666666
3172 //0123456789012345678901234567890123456789012345678901234567890123456789
3173 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
3174 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
3175 standard_compilation.seconds(),
3176 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3177 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
3178 CompileBroker::_t_bailedout_compilation.seconds(),
3179 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3180 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
3181 osr_compilation.seconds(),
3182 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3183 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
3184 CompileBroker::_t_invalidated_compilation.seconds(),
3185 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3186
3187 if (AOTCodeCaching) { // Check flags because AOT code cache could be closed already
3188 tty->cr();
3189 AOTCodeCache::print_timers_on(tty);
3190 }
3191 AbstractCompiler *comp = compiler(CompLevel_simple);
3192 if (comp != nullptr) {
3193 tty->cr();
3194 comp->print_timers();
3195 }
3196 comp = compiler(CompLevel_full_optimization);
3197 if (comp != nullptr) {
3198 tty->cr();
3199 comp->print_timers();
3200 }
3201 comp = _compilers[2];
3202 if (comp != nullptr) {
3203 tty->cr();
3204 comp->print_timers();
3205 }
3206 #if INCLUDE_JVMCI
3207 if (EnableJVMCI) {
3208 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3209 if (jvmci_comp != nullptr && jvmci_comp != comp) {
3210 tty->cr();
3211 jvmci_comp->print_timers();
3212 }
3213 }
3214 #endif
3215
3216 tty->cr();
3217 tty->print_cr(" Total compiled methods : %8u methods", total_compile_count);
3218 tty->print_cr(" Standard compilation : %8u methods", standard_compile_count);
3219 tty->print_cr(" On stack replacement : %8u methods", osr_compile_count);
3220 uint tcb = osr_bytes_compiled + standard_bytes_compiled;
3221 tty->print_cr(" Total compiled bytecodes : %8u bytes", tcb);
3222 tty->print_cr(" Standard compilation : %8u bytes", standard_bytes_compiled);
3223 tty->print_cr(" On stack replacement : %8u bytes", osr_bytes_compiled);
3224 double tcs = total_compilation.seconds();
3225 uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
3226 tty->print_cr(" Average compilation speed : %8u bytes/s", bps);
3227 tty->cr();
3228 tty->print_cr(" nmethod code size : %8u bytes", nmethods_code_size);
3229 tty->print_cr(" nmethod total size : %8u bytes", nmethods_size);
3230 }
3231
3232 // Print general/accumulated JIT information.
3233 void CompileBroker::print_info(outputStream *out) {
3234 if (out == nullptr) out = tty;
3235 out->cr();
3236 out->print_cr("======================");
3237 out->print_cr(" General JIT info ");
3238 out->print_cr("======================");
3239 out->cr();
3240 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
3241 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
3242 out->cr();
3243 out->print_cr("CodeCache overview");
3244 out->print_cr("--------------------------------------------------------");
3245 out->cr();
3246 out->print_cr(" Reserved size : %7zu KB", CodeCache::max_capacity() / K);
3247 out->print_cr(" Committed size : %7zu KB", CodeCache::capacity() / K);
3248 out->print_cr(" Unallocated capacity : %7zu KB", CodeCache::unallocated_capacity() / K);
3249 out->cr();
3250 }
3251
3252 // Note: tty_lock must not be held upon entry to this function.
3253 // Print functions called from herein do "micro-locking" on tty_lock.
3254 // That's a tradeoff which keeps together important blocks of output.
3255 // At the same time, continuous tty_lock hold time is kept in check,
3256 // preventing concurrently printing threads from stalling a long time.
3257 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
3258 TimeStamp ts_total;
3259 TimeStamp ts_global;
3260 TimeStamp ts;
3261
3262 bool allFun = !strcmp(function, "all");
3263 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
3264 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
3265 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
3266 bool methodCount = !strcmp(function, "MethodCount") || allFun;
3267 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
3268 bool methodAge = !strcmp(function, "MethodAge") || allFun;
3269 bool methodNames = !strcmp(function, "MethodNames") || allFun;
3270 bool discard = !strcmp(function, "discard") || allFun;
3271
3272 if (out == nullptr) {
3273 out = tty;
3274 }
3275
3276 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
3277 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
3278 out->cr();
3279 return;
3280 }
3281
3282 ts_total.update(); // record starting point
3283
3284 if (aggregate) {
3285 print_info(out);
3286 }
3287
3288 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
3289 // That prevents other threads from destroying (making inconsistent) our view on the CodeHeap.
3290 // When we request individual parts of the analysis via the jcmd interface, it is possible
3291 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
3292 // updated the aggregated data. We will then see a modified, but again consistent, view
3293 // on the CodeHeap. That's a tolerable tradeoff we have to accept because we can't hold
3294 // a lock across user interaction.
3295
3296 // We should definitely acquire this lock before acquiring Compile_lock and CodeCache_lock.
3297 // CodeHeapStateAnalytics_lock may be held by a concurrent thread for a long time,
3298 // leading to an unnecessarily long hold time of the other locks we acquired before.
3299 ts.update(); // record starting point
3300 MutexLocker mu0(CodeHeapStateAnalytics_lock, Mutex::_safepoint_check_flag);
3301 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
3302
3303 // Holding the CodeCache_lock protects from concurrent alterations of the CodeCache.
3304 // Unfortunately, such protection is not sufficient:
3305 // When a new nmethod is created via ciEnv::register_method(), the
3306 // Compile_lock is taken first. After some initializations,
3307 // nmethod::new_nmethod() takes over, grabbing the CodeCache_lock
3308 // immediately (after finalizing the oop references). To lock out concurrent
3309 // modifiers, we have to grab both locks as well in the described sequence.
3310 //
3311 // If we serve an "allFun" call, it is beneficial to hold CodeCache_lock and Compile_lock
3312 // for the entire duration of aggregation and printing. That makes sure we see
3313 // a consistent picture and do not run into issues caused by concurrent alterations.
3314 bool should_take_Compile_lock = !SafepointSynchronize::is_at_safepoint() &&
3315 !Compile_lock->owned_by_self();
3316 bool should_take_CodeCache_lock = !SafepointSynchronize::is_at_safepoint() &&
3317 !CodeCache_lock->owned_by_self();
3318 bool take_global_lock_1 = allFun && should_take_Compile_lock;
3319 bool take_global_lock_2 = allFun && should_take_CodeCache_lock;
3320 bool take_function_lock_1 = !allFun && should_take_Compile_lock;
3321 bool take_function_lock_2 = !allFun && should_take_CodeCache_lock;
3322 bool take_global_locks = take_global_lock_1 || take_global_lock_2;
3323 bool take_function_locks = take_function_lock_1 || take_function_lock_2;
3324
3325 ts_global.update(); // record starting point
3326
3327 ConditionalMutexLocker mu1(Compile_lock, take_global_lock_1, Mutex::_safepoint_check_flag);
3328 ConditionalMutexLocker mu2(CodeCache_lock, take_global_lock_2, Mutex::_no_safepoint_check_flag);
3329 if (take_global_locks) {
3330 out->print_cr("\n__ Compile & CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
3331 ts_global.update(); // record starting point
3332 }
3333
3334 if (aggregate) {
3335 ts.update(); // record starting point
3336 ConditionalMutexLocker mu11(Compile_lock, take_function_lock_1, Mutex::_safepoint_check_flag);
3337 ConditionalMutexLocker mu22(CodeCache_lock, take_function_lock_2, Mutex::_no_safepoint_check_flag);
3338 if (take_function_locks) {
3339 out->print_cr("\n__ Compile & CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
3340 }
3341
3342 ts.update(); // record starting point
3343 CodeCache::aggregate(out, granularity);
3344 if (take_function_locks) {
3345 out->print_cr("\n__ Compile & CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
3346 }
3347 }
3348
3349 if (usedSpace) CodeCache::print_usedSpace(out);
3350 if (freeSpace) CodeCache::print_freeSpace(out);
3351 if (methodCount) CodeCache::print_count(out);
3352 if (methodSpace) CodeCache::print_space(out);
3353 if (methodAge) CodeCache::print_age(out);
3354 if (methodNames) {
3355 if (allFun) {
3356 // print_names() can only be used safely if the locks have been continuously held
3357 // since aggregation begin. That is true only for function "all".
3358 CodeCache::print_names(out);
3359 } else {
3360 out->print_cr("\nCodeHeapStateAnalytics: Function 'MethodNames' is only available as part of function 'all'");
3361 }
3362 }
3363 if (discard) CodeCache::discard(out);
3364
3365 if (take_global_locks) {
3366 out->print_cr("\n__ Compile & CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
3367 }
3368 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
3369 }