1 /*
2 * Copyright (c) 1999, 2024, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/classPreloader.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/codeCache.hpp"
33 #include "code/codeHeapState.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/SCCache.hpp"
36 #include "compiler/compilationLog.hpp"
37 #include "compiler/compilationMemoryStatistic.hpp"
38 #include "compiler/compilationPolicy.hpp"
39 #include "compiler/compileBroker.hpp"
40 #include "compiler/compilerDefinitions.inline.hpp"
41 #include "compiler/compileLog.hpp"
42 #include "compiler/compilerEvent.hpp"
43 #include "compiler/compilerOracle.hpp"
44 #include "compiler/directivesParser.hpp"
45 #include "gc/shared/memAllocator.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "jfr/jfrEvents.hpp"
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/methodData.hpp"
55 #include "oops/method.inline.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 #ifdef COMPILER1
84 #include "c1/c1_Compiler.hpp"
85 #endif
86 #ifdef COMPILER2
87 #include "opto/c2compiler.hpp"
88 #endif
89 #if INCLUDE_JVMCI
90 #include "jvmci/jvmciEnv.hpp"
91 #include "jvmci/jvmciRuntime.hpp"
92 #endif
93
94 #ifdef DTRACE_ENABLED
95
96 // Only bother with this argument setup if dtrace is available
97
98 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
99 { \
100 Symbol* klass_name = (method)->klass_name(); \
101 Symbol* name = (method)->name(); \
102 Symbol* signature = (method)->signature(); \
103 HOTSPOT_METHOD_COMPILE_BEGIN( \
104 (char *) comp_name, strlen(comp_name), \
105 (char *) klass_name->bytes(), klass_name->utf8_length(), \
106 (char *) name->bytes(), name->utf8_length(), \
107 (char *) signature->bytes(), signature->utf8_length()); \
108 }
109
110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
111 { \
112 Symbol* klass_name = (method)->klass_name(); \
113 Symbol* name = (method)->name(); \
114 Symbol* signature = (method)->signature(); \
115 HOTSPOT_METHOD_COMPILE_END( \
116 (char *) comp_name, strlen(comp_name), \
117 (char *) klass_name->bytes(), klass_name->utf8_length(), \
118 (char *) name->bytes(), name->utf8_length(), \
119 (char *) signature->bytes(), signature->utf8_length(), (success)); \
120 }
121
122 #else // ndef DTRACE_ENABLED
123
124 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
125 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
126
127 #endif // ndef DTRACE_ENABLED
128
129 bool CompileBroker::_initialized = false;
130 bool CompileBroker::_replay_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::_sc_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::_sc_objects = nullptr;
149
150 CompileLog** CompileBroker::_compiler1_logs = nullptr;
151 CompileLog** CompileBroker::_compiler2_logs = nullptr;
152 CompileLog** CompileBroker::_compiler3_logs = nullptr;
153 CompileLog** CompileBroker::_sc_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::_scc_stats;
209 CompilerStatistics CompileBroker::_scc_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::_sc1_compile_queue = nullptr;
215 CompileQueue* CompileBroker::_sc2_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, task->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 free 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 task->lock()->notify_all();
268 }
269 }
270 if (free_task) {
271 // The task can only be freed once the task lock is released.
272 CompileTask::free(task);
273 }
274 } else {
275 task->mark_complete();
276
277 // By convention, the compiling thread is responsible for
278 // recycling a non-blocking CompileTask.
279 CompileTask::free(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 (CompilationPolicy::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() &&
375 !CDSConfig::is_dumping_final_static_archive()) { // FIXME: !!! MetaspaceShared::preload_and_dump() temporarily enables RecordTraining !!!
376 CompileTrainingData* tdata = CompileTrainingData::make(task);
377 if (tdata != nullptr) {
378 tdata->record_compilation_queued(task);
379 task->set_training_data(tdata);
380 }
381 }
382
383 // Notify CompilerThreads that a task is available.
384 _lock->notify_all();
385 }
386
387 void CompileQueue::add_pending(CompileTask* task) {
388 assert(_lock->owned_by_self() == false, "must NOT own lock");
389 assert(UseLockFreeCompileQueues, "");
390 task->method()->set_queued_for_compilation();
391 _queue.push(*task);
392 // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
393 if (is_empty()) {
394 MutexLocker ml(_lock);
395 _lock->notify_all();
396 }
397 }
398
399 void CompileQueue::transfer_pending() {
400 assert(_lock->owned_by_self(), "must own lock");
401 while (!_queue.empty()) {
402 CompileTask* task = _queue.pop();
403 // guarantee(task->method()->queued_for_compilation(), "");
404 task->method()->set_queued_for_compilation(); // FIXME
405 if (task->method()->pending_queue_processed()) {
406 task->set_next(_first_stale);
407 task->set_prev(nullptr);
408 _first_stale = task;
409 continue; // skip
410 } else {
411 // Mark the method as being in the compile queue.
412 task->method()->set_pending_queue_processed();
413 }
414 if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
415 task->requires_online_compilation(), task->compile_reason())) {
416 task->set_next(_first_stale);
417 task->set_prev(nullptr);
418 _first_stale = task;
419 continue; // skip
420 }
421 add(task);
422 }
423 }
424
425 /**
426 * Empties compilation queue by putting all compilation tasks onto
427 * a freelist. Furthermore, the method wakes up all threads that are
428 * waiting on a compilation task to finish. This can happen if background
429 * compilation is disabled.
430 */
431 void CompileQueue::free_all() {
432 MutexLocker mu(_lock);
433 transfer_pending();
434
435 CompileTask* next = _first;
436
437 // Iterate over all tasks in the compile queue
438 while (next != nullptr) {
439 CompileTask* current = next;
440 next = current->next();
441 {
442 // Wake up thread that blocks on the compile task.
443 MutexLocker ct_lock(current->lock());
444 current->lock()->notify();
445 }
446 // Put the task back on the freelist.
447 CompileTask::free(current);
448 }
449 _first = nullptr;
450 _last = nullptr;
451
452 // Wake up all threads that block on the queue.
453 _lock->notify_all();
454 }
455
456 /**
457 * Get the next CompileTask from a CompileQueue
458 */
459 CompileTask* CompileQueue::get(CompilerThread* thread) {
460 // save methods from RedefineClasses across safepoint
461 // across compile queue lock below.
462 methodHandle save_method;
463 methodHandle save_hot_method;
464
465 MonitorLocker locker(_lock);
466 transfer_pending();
467
468 CompilationPolicy::sample_load_average();
469
470 // If _first is null we have no more compile jobs. There are two reasons for
471 // having no compile jobs: First, we compiled everything we wanted. Second,
472 // we ran out of code cache so compilation has been disabled. In the latter
473 // case we perform code cache sweeps to free memory such that we can re-enable
474 // compilation.
475 while (_first == nullptr) {
476 // Exit loop if compilation is disabled forever
477 if (CompileBroker::is_compilation_disabled_forever()) {
478 return nullptr;
479 }
480
481 AbstractCompiler* compiler = thread->compiler();
482 guarantee(compiler != nullptr, "Compiler object must exist");
483 compiler->on_empty_queue(this, thread);
484 if (_first != nullptr) {
485 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
486 // so check again whether any tasks were added to the queue.
487 break;
488 }
489
490 // If there are no compilation tasks and we can compile new jobs
491 // (i.e., there is enough free space in the code cache) there is
492 // no need to invoke the GC.
493 // We need a timed wait here, since compiler threads can exit if compilation
494 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
495 // is not critical and we do not want idle compiler threads to wake up too often.
496 locker.wait(5*1000);
497
498 transfer_pending(); // reacquired lock
499
500 if (CompilationPolicy::have_recompilation_work()) return nullptr;
501
502 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
503 // Still nothing to compile. Give caller a chance to stop this thread.
504 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
505 }
506 }
507
508 if (CompileBroker::is_compilation_disabled_forever()) {
509 return nullptr;
510 }
511
512 CompileTask* task;
513 {
514 NoSafepointVerifier nsv;
515 task = CompilationPolicy::select_task(this, thread);
516 if (task != nullptr) {
517 task = task->select_for_compilation();
518 }
519 }
520
521 if (task != nullptr) {
522 // Save method pointers across unlock safepoint. The task is removed from
523 // the compilation queue, which is walked during RedefineClasses.
524 Thread* thread = Thread::current();
525 save_method = methodHandle(thread, task->method());
526 save_hot_method = methodHandle(thread, task->hot_method());
527
528 remove(task);
529 }
530 purge_stale_tasks(); // may temporarily release MCQ lock
531 return task;
532 }
533
534 // Clean & deallocate stale compile tasks.
535 // Temporarily releases MethodCompileQueue lock.
536 void CompileQueue::purge_stale_tasks() {
537 assert(_lock->owned_by_self(), "must own lock");
538 if (_first_stale != nullptr) {
539 // Stale tasks are purged when MCQ lock is released,
540 // but _first_stale updates are protected by MCQ lock.
541 // Once task processing starts and MCQ lock is released,
542 // other compiler threads can reuse _first_stale.
543 CompileTask* head = _first_stale;
544 _first_stale = nullptr;
545 {
546 MutexUnlocker ul(_lock);
547 for (CompileTask* task = head; task != nullptr; ) {
548 CompileTask* next_task = task->next();
549 CompileTaskWrapper ctw(task); // Frees the task
550 task->set_failure_reason("stale task");
551 task = next_task;
552 }
553 }
554 transfer_pending(); // transfer pending after reacquiring MCQ lock
555 }
556 }
557
558 void CompileQueue::remove(CompileTask* task) {
559 assert(_lock->owned_by_self(), "must own lock");
560 if (task->prev() != nullptr) {
561 task->prev()->set_next(task->next());
562 } else {
563 // max is the first element
564 assert(task == _first, "Sanity");
565 _first = task->next();
566 }
567
568 if (task->next() != nullptr) {
569 task->next()->set_prev(task->prev());
570 } else {
571 // max is the last element
572 assert(task == _last, "Sanity");
573 _last = task->prev();
574 }
575 --_size;
576 ++_total_removed;
577 }
578
579 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
580 assert(_lock->owned_by_self(), "must own lock");
581 remove(task);
582
583 // Enqueue the task for reclamation (should be done outside MCQ lock)
584 task->set_next(_first_stale);
585 task->set_prev(nullptr);
586 _first_stale = task;
587 }
588
589 // methods in the compile queue need to be marked as used on the stack
590 // so that they don't get reclaimed by Redefine Classes
591 void CompileQueue::mark_on_stack() {
592 CompileTask* task = _first;
593 while (task != nullptr) {
594 task->mark_on_stack();
595 task = task->next();
596 }
597 }
598
599
600 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_scc) {
601 if (is_c2_compile(comp_level)) return (is_scc ? _sc2_compile_queue : _c2_compile_queue);
602 if (is_c1_compile(comp_level)) return (is_scc ? _sc1_compile_queue : _c1_compile_queue);
603 return nullptr;
604 }
605
606 CompileQueue* CompileBroker::c1_compile_queue() {
607 return _c1_compile_queue;
608 }
609
610 CompileQueue* CompileBroker::c2_compile_queue() {
611 return _c2_compile_queue;
612 }
613
614 void CompileBroker::print_compile_queues(outputStream* st) {
615 st->print_cr("Current compiles: ");
616
617 char buf[2000];
618 int buflen = sizeof(buf);
619 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
620
621 st->cr();
622 if (_c1_compile_queue != nullptr) {
623 _c1_compile_queue->print(st);
624 }
625 if (_c2_compile_queue != nullptr) {
626 _c2_compile_queue->print(st);
627 }
628 if (_c3_compile_queue != nullptr) {
629 _c3_compile_queue->print(st);
630 }
631 if (_sc1_compile_queue != nullptr) {
632 _sc1_compile_queue->print(st);
633 }
634 if (_sc2_compile_queue != nullptr) {
635 _sc2_compile_queue->print(st);
636 }
637 }
638
639 void CompileQueue::print(outputStream* st) {
640 assert_locked_or_safepoint(_lock);
641 st->print_cr("%s:", name());
642 CompileTask* task = _first;
643 if (task == nullptr) {
644 st->print_cr("Empty");
645 } else {
646 while (task != nullptr) {
647 task->print(st, nullptr, true, true);
648 task = task->next();
649 }
650 }
651 st->cr();
652 }
653
654 void CompileQueue::print_tty() {
655 stringStream ss;
656 // Dump the compile queue into a buffer before locking the tty
657 print(&ss);
658 {
659 ttyLocker ttyl;
660 tty->print("%s", ss.freeze());
661 }
662 }
663
664 CompilerCounters::CompilerCounters() {
665 _current_method[0] = '\0';
666 _compile_type = CompileBroker::no_compile;
667 }
668
669 #if INCLUDE_JFR && COMPILER2_OR_JVMCI
670 // It appends new compiler phase names to growable array phase_names(a new CompilerPhaseType mapping
671 // in compiler/compilerEvent.cpp) and registers it with its serializer.
672 //
673 // c2 uses explicit CompilerPhaseType idToPhase mapping in opto/phasetype.hpp,
674 // so if c2 is used, it should be always registered first.
675 // This function is called during vm initialization.
676 static void register_jfr_phasetype_serializer(CompilerType compiler_type) {
677 ResourceMark rm;
678 static bool first_registration = true;
679 if (compiler_type == compiler_jvmci) {
680 CompilerEvent::PhaseEvent::get_phase_id("NOT_A_PHASE_NAME", false, false, false);
681 first_registration = false;
682 #ifdef COMPILER2
683 } else if (compiler_type == compiler_c2) {
684 assert(first_registration, "invariant"); // c2 must be registered first.
685 for (int i = 0; i < PHASE_NUM_TYPES; i++) {
686 const char* phase_name = CompilerPhaseTypeHelper::to_description((CompilerPhaseType) i);
687 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
688 }
689 first_registration = false;
690 #endif // COMPILER2
691 }
692 }
693 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
694
695 // ------------------------------------------------------------------
696 // CompileBroker::compilation_init
697 //
698 // Initialize the Compilation object
699 void CompileBroker::compilation_init(JavaThread* THREAD) {
700 // No need to initialize compilation system if we do not use it.
701 if (!UseCompiler) {
702 return;
703 }
704 // Set the interface to the current compiler(s).
705 _c1_count = CompilationPolicy::c1_count();
706 _c2_count = CompilationPolicy::c2_count();
707 _c3_count = CompilationPolicy::c3_count();
708 _sc_count = CompilationPolicy::sc_count();
709
710 #if INCLUDE_JVMCI
711 if (EnableJVMCI) {
712 // This is creating a JVMCICompiler singleton.
713 JVMCICompiler* jvmci = new JVMCICompiler();
714
715 if (UseJVMCICompiler) {
716 _compilers[1] = jvmci;
717 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
718 if (BootstrapJVMCI) {
719 // JVMCI will bootstrap so give it more threads
720 _c2_count = MIN2(32, os::active_processor_count());
721 }
722 } else {
723 _c2_count = JVMCIThreads;
724 }
725 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
726 } else {
727 #ifdef COMPILER1
728 _c1_count = JVMCIHostThreads;
729 #endif // COMPILER1
730 }
731 #ifdef COMPILER2
732 if (SCCache::is_on() && (_c3_count > 0)) {
733 _compilers[2] = new C2Compiler();
734 }
735 #endif
736 }
737 }
738 #endif // INCLUDE_JVMCI
739
740 #ifdef COMPILER1
741 if (_c1_count > 0) {
742 _compilers[0] = new Compiler();
743 }
744 #endif // COMPILER1
745
746 #ifdef COMPILER2
747 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
748 if (_c2_count > 0) {
749 _compilers[1] = new C2Compiler();
750 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
751 // idToPhase mapping for c2 is in opto/phasetype.hpp
752 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
753 }
754 }
755 #endif // COMPILER2
756
757 #if INCLUDE_JVMCI
758 // Register after c2 registration.
759 // JVMCI CompilerPhaseType idToPhase mapping is dynamic.
760 if (EnableJVMCI) {
761 JFR_ONLY(register_jfr_phasetype_serializer(compiler_jvmci);)
762 }
763 #endif // INCLUDE_JVMCI
764
765 if (CompilerOracle::should_collect_memstat()) {
766 CompilationMemoryStatistic::initialize();
767 }
768
769 // Start the compiler thread(s)
770 init_compiler_threads();
771 // totalTime performance counter is always created as it is required
772 // by the implementation of java.lang.management.CompilationMXBean.
773 {
774 // Ensure OOM leads to vm_exit_during_initialization.
775 EXCEPTION_MARK;
776 _perf_total_compilation =
777 PerfDataManager::create_counter(JAVA_CI, "totalTime",
778 PerfData::U_Ticks, CHECK);
779 }
780
781 if (UsePerfData) {
782
783 EXCEPTION_MARK;
784
785 // create the jvmstat performance counters
786 _perf_osr_compilation =
787 PerfDataManager::create_counter(SUN_CI, "osrTime",
788 PerfData::U_Ticks, CHECK);
789
790 _perf_standard_compilation =
791 PerfDataManager::create_counter(SUN_CI, "standardTime",
792 PerfData::U_Ticks, CHECK);
793
794 _perf_total_bailout_count =
795 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
796 PerfData::U_Events, CHECK);
797
798 _perf_total_invalidated_count =
799 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
800 PerfData::U_Events, CHECK);
801
802 _perf_total_compile_count =
803 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
804 PerfData::U_Events, CHECK);
805 _perf_total_osr_compile_count =
806 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
807 PerfData::U_Events, CHECK);
808
809 _perf_total_standard_compile_count =
810 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
811 PerfData::U_Events, CHECK);
812
813 _perf_sum_osr_bytes_compiled =
814 PerfDataManager::create_counter(SUN_CI, "osrBytes",
815 PerfData::U_Bytes, CHECK);
816
817 _perf_sum_standard_bytes_compiled =
818 PerfDataManager::create_counter(SUN_CI, "standardBytes",
819 PerfData::U_Bytes, CHECK);
820
821 _perf_sum_nmethod_size =
822 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
823 PerfData::U_Bytes, CHECK);
824
825 _perf_sum_nmethod_code_size =
826 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
827 PerfData::U_Bytes, CHECK);
828
829 _perf_last_method =
830 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
831 CompilerCounters::cmname_buffer_length,
832 "", CHECK);
833
834 _perf_last_failed_method =
835 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
836 CompilerCounters::cmname_buffer_length,
837 "", CHECK);
838
839 _perf_last_invalidated_method =
840 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
841 CompilerCounters::cmname_buffer_length,
842 "", CHECK);
843
844 _perf_last_compile_type =
845 PerfDataManager::create_variable(SUN_CI, "lastType",
846 PerfData::U_None,
847 (jlong)CompileBroker::no_compile,
848 CHECK);
849
850 _perf_last_compile_size =
851 PerfDataManager::create_variable(SUN_CI, "lastSize",
852 PerfData::U_Bytes,
853 (jlong)CompileBroker::no_compile,
854 CHECK);
855
856
857 _perf_last_failed_type =
858 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
859 PerfData::U_None,
860 (jlong)CompileBroker::no_compile,
861 CHECK);
862
863 _perf_last_invalidated_type =
864 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
865 PerfData::U_None,
866 (jlong)CompileBroker::no_compile,
867 CHECK);
868 }
869
870 log_info(scc, init)("CompileBroker is initialized");
871 _initialized = true;
872 }
873
874 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
875 Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
876 return thread_oop;
877 }
878
879 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
880 CompilationPolicy::replay_training_at_init_loop(thread);
881 }
882
883 #if defined(ASSERT) && COMPILER2_OR_JVMCI
884 // Stress testing. Dedicated threads revert optimizations based on escape analysis concurrently to
885 // the running java application. Configured with vm options DeoptimizeObjectsALot*.
886 class DeoptimizeObjectsALotThread : public JavaThread {
887
888 static void deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS);
889 void deoptimize_objects_alot_loop_single();
890 void deoptimize_objects_alot_loop_all();
891
892 public:
893 DeoptimizeObjectsALotThread() : JavaThread(&deopt_objs_alot_thread_entry) { }
894
895 bool is_hidden_from_external_view() const { return true; }
896 };
897
898 // Entry for DeoptimizeObjectsALotThread. The threads are started in
899 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
900 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
901 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
902 bool enter_single_loop;
903 {
904 MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
905 static int single_thread_count = 0;
906 enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
907 }
908 if (enter_single_loop) {
909 dt->deoptimize_objects_alot_loop_single();
910 } else {
911 dt->deoptimize_objects_alot_loop_all();
912 }
913 }
914
915 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
916 // barrier targets a single thread which is selected round robin.
917 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_single() {
918 HandleMark hm(this);
919 while (true) {
920 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *deoptee_thread = jtiwh.next(); ) {
921 { // Begin new scope for escape barrier
922 HandleMarkCleaner hmc(this);
923 ResourceMark rm(this);
924 EscapeBarrier eb(true, this, deoptee_thread);
925 eb.deoptimize_objects(100);
926 }
927 // Now sleep after the escape barriers destructor resumed deoptee_thread.
928 sleep(DeoptimizeObjectsALotInterval);
929 }
930 }
931 }
932
933 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
934 // barrier targets all java threads in the vm at once.
935 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_all() {
936 HandleMark hm(this);
937 while (true) {
938 { // Begin new scope for escape barrier
939 HandleMarkCleaner hmc(this);
940 ResourceMark rm(this);
941 EscapeBarrier eb(true, this);
942 eb.deoptimize_objects_all_threads();
943 }
944 // Now sleep after the escape barriers destructor resumed the java threads.
945 sleep(DeoptimizeObjectsALotInterval);
946 }
947 }
948 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
949
950
951 JavaThread* CompileBroker::make_thread(ThreadType type, jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, JavaThread* THREAD) {
952 Handle thread_oop(THREAD, JNIHandles::resolve_non_null(thread_handle));
953
954 if (java_lang_Thread::thread(thread_oop()) != nullptr) {
955 assert(type == compiler_t, "should only happen with reused compiler threads");
956 // The compiler thread hasn't actually exited yet so don't try to reuse it
957 return nullptr;
958 }
959
960 JavaThread* new_thread = nullptr;
961 switch (type) {
962 case compiler_t:
963 assert(comp != nullptr, "Compiler instance missing.");
964 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
965 CompilerCounters* counters = new CompilerCounters();
966 new_thread = new CompilerThread(queue, counters);
967 }
968 break;
969 #if defined(ASSERT) && COMPILER2_OR_JVMCI
970 case deoptimizer_t:
971 new_thread = new DeoptimizeObjectsALotThread();
972 break;
973 #endif // ASSERT
974 case training_replay_t:
975 new_thread = new TrainingReplayThread();
976 break;
977 default:
978 ShouldNotReachHere();
979 }
980
981 // At this point the new CompilerThread data-races with this startup
982 // thread (which is the main thread and NOT the VM thread).
983 // This means Java bytecodes being executed at startup can
984 // queue compile jobs which will run at whatever default priority the
985 // newly created CompilerThread runs at.
986
987
988 // At this point it may be possible that no osthread was created for the
989 // JavaThread due to lack of resources. We will handle that failure below.
990 // Also check new_thread so that static analysis is happy.
991 if (new_thread != nullptr && new_thread->osthread() != nullptr) {
992
993 if (type == compiler_t) {
994 CompilerThread::cast(new_thread)->set_compiler(comp);
995 }
996
997 // Note that we cannot call os::set_priority because it expects Java
998 // priorities and we are *explicitly* using OS priorities so that it's
999 // possible to set the compiler thread priority higher than any Java
1000 // thread.
1001
1002 int native_prio = CompilerThreadPriority;
1003 if (native_prio == -1) {
1004 if (UseCriticalCompilerThreadPriority) {
1005 native_prio = os::java_to_os_priority[CriticalPriority];
1006 } else {
1007 native_prio = os::java_to_os_priority[NearMaxPriority];
1008 }
1009 }
1010 os::set_native_priority(new_thread, native_prio);
1011
1012 // Note that this only sets the JavaThread _priority field, which by
1013 // definition is limited to Java priorities and not OS priorities.
1014 JavaThread::start_internal_daemon(THREAD, new_thread, thread_oop, NearMaxPriority);
1015
1016 } else { // osthread initialization failure
1017 if (UseDynamicNumberOfCompilerThreads && type == compiler_t
1018 && comp->num_compiler_threads() > 0) {
1019 // The new thread is not known to Thread-SMR yet so we can just delete.
1020 delete new_thread;
1021 return nullptr;
1022 } else {
1023 vm_exit_during_initialization("java.lang.OutOfMemoryError",
1024 os::native_thread_creation_failed_msg());
1025 }
1026 }
1027
1028 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
1029
1030 return new_thread;
1031 }
1032
1033 static bool trace_compiler_threads() {
1034 LogTarget(Debug, jit, thread) lt;
1035 return TraceCompilerThreads || lt.is_enabled();
1036 }
1037
1038 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1039 char name_buffer[256];
1040 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1041 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1042 return JNIHandles::make_global(thread_oop);
1043 }
1044
1045 static void print_compiler_threads(stringStream& msg) {
1046 if (TraceCompilerThreads) {
1047 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1048 }
1049 LogTarget(Debug, jit, thread) lt;
1050 if (lt.is_enabled()) {
1051 LogStream ls(lt);
1052 ls.print_cr("%s", msg.as_string());
1053 }
1054 }
1055
1056 static void print_compiler_thread(JavaThread *ct) {
1057 if (trace_compiler_threads()) {
1058 ResourceMark rm;
1059 ThreadsListHandle tlh; // name() depends on the TLH.
1060 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1061 stringStream msg;
1062 msg.print("Added initial compiler thread %s", ct->name());
1063 print_compiler_threads(msg);
1064 }
1065 }
1066
1067 void CompileBroker::init_compiler_threads() {
1068 // Ensure any exceptions lead to vm_exit_during_initialization.
1069 EXCEPTION_MARK;
1070 #if !defined(ZERO)
1071 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1072 #endif // !ZERO
1073 // Initialize the compilation queue
1074 if (_c2_count > 0) {
1075 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1076 _c2_compile_queue = new CompileQueue(name, MethodCompileQueueC2_lock);
1077 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1078 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1079 }
1080 if (_c1_count > 0) {
1081 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1082 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1083 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1084 }
1085
1086 if (_c3_count > 0) {
1087 const char* name = "C2 compile queue";
1088 _c3_compile_queue = new CompileQueue(name, MethodCompileQueueC3_lock);
1089 _compiler3_objects = NEW_C_HEAP_ARRAY(jobject, _c3_count, mtCompiler);
1090 _compiler3_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c3_count, mtCompiler);
1091 }
1092 if (_sc_count > 0) {
1093 if (_c1_count > 0) { // C1 is present
1094 _sc1_compile_queue = new CompileQueue("C1 SC compile queue", MethodCompileQueueSC1_lock);
1095 }
1096 if (_c2_count > 0) { // C2 is present
1097 _sc2_compile_queue = new CompileQueue("C2 SC compile queue", MethodCompileQueueSC2_lock);
1098 }
1099 _sc_objects = NEW_C_HEAP_ARRAY(jobject, _sc_count, mtCompiler);
1100 _sc_logs = NEW_C_HEAP_ARRAY(CompileLog*, _sc_count, mtCompiler);
1101 }
1102 char name_buffer[256];
1103
1104 for (int i = 0; i < _c2_count; i++) {
1105 // Create a name for our thread.
1106 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1107 _compiler2_objects[i] = thread_handle;
1108 _compiler2_logs[i] = nullptr;
1109
1110 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1111 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1112 assert(ct != nullptr, "should have been handled for initial thread");
1113 _compilers[1]->set_num_compiler_threads(i + 1);
1114 print_compiler_thread(ct);
1115 }
1116 }
1117
1118 for (int i = 0; i < _c1_count; i++) {
1119 // Create a name for our thread.
1120 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1121 _compiler1_objects[i] = thread_handle;
1122 _compiler1_logs[i] = nullptr;
1123
1124 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1125 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1126 assert(ct != nullptr, "should have been handled for initial thread");
1127 _compilers[0]->set_num_compiler_threads(i + 1);
1128 print_compiler_thread(ct);
1129 }
1130 }
1131
1132 for (int i = 0; i < _c3_count; i++) {
1133 // Create a name for our thread.
1134 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C2 CompilerThread%d", i);
1135 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1136 jobject thread_handle = JNIHandles::make_global(thread_oop);
1137 _compiler3_objects[i] = thread_handle;
1138 _compiler3_logs[i] = nullptr;
1139
1140 JavaThread *ct = make_thread(compiler_t, thread_handle, _c3_compile_queue, _compilers[2], THREAD);
1141 assert(ct != nullptr, "should have been handled for initial thread");
1142 _compilers[2]->set_num_compiler_threads(i + 1);
1143 print_compiler_thread(ct);
1144 }
1145
1146 if (_sc_count > 0) {
1147 int i = 0;
1148 if (_c1_count > 0) { // C1 is present
1149 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 1);
1150 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1151 jobject thread_handle = JNIHandles::make_global(thread_oop);
1152 _sc_objects[i] = thread_handle;
1153 _sc_logs[i] = nullptr;
1154 i++;
1155
1156 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc1_compile_queue, _compilers[0], THREAD);
1157 assert(ct != nullptr, "should have been handled for initial thread");
1158 print_compiler_thread(ct);
1159 }
1160 if (_c2_count > 0) { // C2 is present
1161 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 2);
1162 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1163 jobject thread_handle = JNIHandles::make_global(thread_oop);
1164 _sc_objects[i] = thread_handle;
1165 _sc_logs[i] = nullptr;
1166
1167 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc2_compile_queue, _compilers[1], THREAD);
1168 assert(ct != nullptr, "should have been handled for initial thread");
1169 print_compiler_thread(ct);
1170 }
1171 }
1172
1173 if (UsePerfData) {
1174 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count + _c3_count, CHECK);
1175 }
1176
1177 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1178 if (DeoptimizeObjectsALot) {
1179 // Initialize and start the object deoptimizer threads
1180 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1181 for (int count = 0; count < total_count; count++) {
1182 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1183 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1184 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1185 }
1186 }
1187 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1188 }
1189
1190 void CompileBroker::init_training_replay() {
1191 // Ensure any exceptions lead to vm_exit_during_initialization.
1192 EXCEPTION_MARK;
1193 if (TrainingData::have_data()) {
1194 if (UseConcurrentTrainingReplay) {
1195 Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1196 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1197 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1198 }
1199 _replay_initialized = true;
1200 }
1201 }
1202
1203 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1204
1205 julong free_memory = os::free_memory();
1206 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
1207 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
1208 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
1209
1210 // Only do attempt to start additional threads if the lock is free.
1211 if (!CompileThread_lock->try_lock()) return;
1212
1213 if (_c2_compile_queue != nullptr) {
1214 int old_c2_count = _compilers[1]->num_compiler_threads();
1215 int new_c2_count = MIN4(_c2_count,
1216 _c2_compile_queue->size() / 2,
1217 (int)(free_memory / (200*M)),
1218 (int)(available_cc_np / (128*K)));
1219
1220 for (int i = old_c2_count; i < new_c2_count; i++) {
1221 #if INCLUDE_JVMCI
1222 if (UseJVMCICompiler && !UseJVMCINativeLibrary && _compiler2_objects[i] == nullptr) {
1223 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread objects as their
1224 // existence is completely hidden from the rest of the VM (and those compiler threads can't
1225 // call Java code to do the creation anyway).
1226 //
1227 // For pure Java JVMCI we have to create new j.l.Thread objects as they are visible and we
1228 // can see unexpected thread lifecycle transitions if we bind them to new JavaThreads. For
1229 // native library JVMCI it's preferred to use the C1/C2 strategy as this avoids unnecessary
1230 // coupling with Java.
1231 if (!THREAD->can_call_java()) break;
1232 char name_buffer[256];
1233 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", _compilers[1]->name(), i);
1234 Handle thread_oop;
1235 {
1236 // We have to give up the lock temporarily for the Java calls.
1237 MutexUnlocker mu(CompileThread_lock);
1238 thread_oop = JavaThread::create_system_thread_object(name_buffer, THREAD);
1239 }
1240 if (HAS_PENDING_EXCEPTION) {
1241 if (trace_compiler_threads()) {
1242 ResourceMark rm;
1243 stringStream msg;
1244 msg.print_cr("JVMCI compiler thread creation failed:");
1245 PENDING_EXCEPTION->print_on(&msg);
1246 print_compiler_threads(msg);
1247 }
1248 CLEAR_PENDING_EXCEPTION;
1249 break;
1250 }
1251 // Check if another thread has beaten us during the Java calls.
1252 if (_compilers[1]->num_compiler_threads() != i) break;
1253 jobject thread_handle = JNIHandles::make_global(thread_oop);
1254 assert(compiler2_object(i) == nullptr, "Old one must be released!");
1255 _compiler2_objects[i] = thread_handle;
1256 }
1257 #endif
1258 guarantee(compiler2_object(i) != nullptr, "Thread oop must exist");
1259 JavaThread *ct = make_thread(compiler_t, compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD);
1260 if (ct == nullptr) break;
1261 _compilers[1]->set_num_compiler_threads(i + 1);
1262 if (trace_compiler_threads()) {
1263 ResourceMark rm;
1264 ThreadsListHandle tlh; // name() depends on the TLH.
1265 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1266 stringStream msg;
1267 msg.print("Added compiler thread %s (free memory: %dMB, available non-profiled code cache: %dMB)",
1268 ct->name(), (int)(free_memory/M), (int)(available_cc_np/M));
1269 print_compiler_threads(msg);
1270 }
1271 }
1272 }
1273
1274 if (_c1_compile_queue != nullptr) {
1275 int old_c1_count = _compilers[0]->num_compiler_threads();
1276 int new_c1_count = MIN4(_c1_count,
1277 _c1_compile_queue->size() / 4,
1278 (int)(free_memory / (100*M)),
1279 (int)(available_cc_p / (128*K)));
1280
1281 for (int i = old_c1_count; i < new_c1_count; i++) {
1282 JavaThread *ct = make_thread(compiler_t, compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD);
1283 if (ct == nullptr) break;
1284 _compilers[0]->set_num_compiler_threads(i + 1);
1285 if (trace_compiler_threads()) {
1286 ResourceMark rm;
1287 ThreadsListHandle tlh; // name() depends on the TLH.
1288 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1289 stringStream msg;
1290 msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1291 ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1292 print_compiler_threads(msg);
1293 }
1294 }
1295 }
1296
1297 CompileThread_lock->unlock();
1298 }
1299
1300
1301 /**
1302 * Set the methods on the stack as on_stack so that redefine classes doesn't
1303 * reclaim them. This method is executed at a safepoint.
1304 */
1305 void CompileBroker::mark_on_stack() {
1306 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1307 // Since we are at a safepoint, we do not need a lock to access
1308 // the compile queues.
1309 if (_c3_compile_queue != nullptr) {
1310 _c3_compile_queue->mark_on_stack();
1311 }
1312 if (_c2_compile_queue != nullptr) {
1313 _c2_compile_queue->mark_on_stack();
1314 }
1315 if (_c1_compile_queue != nullptr) {
1316 _c1_compile_queue->mark_on_stack();
1317 }
1318 if (_sc1_compile_queue != nullptr) {
1319 _sc1_compile_queue->mark_on_stack();
1320 }
1321 if (_sc2_compile_queue != nullptr) {
1322 _sc2_compile_queue->mark_on_stack();
1323 }
1324 }
1325
1326 // ------------------------------------------------------------------
1327 // CompileBroker::compile_method
1328 //
1329 // Request compilation of a method.
1330 void CompileBroker::compile_method_base(const methodHandle& method,
1331 int osr_bci,
1332 int comp_level,
1333 const methodHandle& hot_method,
1334 int hot_count,
1335 CompileTask::CompileReason compile_reason,
1336 bool requires_online_compilation,
1337 bool blocking,
1338 Thread* thread) {
1339 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1340 assert(method->method_holder()->is_instance_klass(),
1341 "sanity check");
1342 assert(!method->method_holder()->is_not_initialized() ||
1343 compile_reason == CompileTask::Reason_Preload ||
1344 compile_reason == CompileTask::Reason_Precompile ||
1345 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1346 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1347
1348 if (CIPrintRequests) {
1349 tty->print("request: ");
1350 method->print_short_name(tty);
1351 if (osr_bci != InvocationEntryBci) {
1352 tty->print(" osr_bci: %d", osr_bci);
1353 }
1354 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1355 if (!hot_method.is_null()) {
1356 tty->print(" hot: ");
1357 if (hot_method() != method()) {
1358 hot_method->print_short_name(tty);
1359 } else {
1360 tty->print("yes");
1361 }
1362 }
1363 tty->cr();
1364 }
1365
1366 // A request has been made for compilation. Before we do any
1367 // real work, check to see if the method has been compiled
1368 // in the meantime with a definitive result.
1369 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1370 return;
1371 }
1372
1373 #ifndef PRODUCT
1374 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1375 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1376 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1377 return;
1378 }
1379 }
1380 #endif
1381
1382 // If this method is already in the compile queue, then
1383 // we do not block the current thread.
1384 if (compilation_is_in_queue(method)) {
1385 // We may want to decay our counter a bit here to prevent
1386 // multiple denied requests for compilation. This is an
1387 // open compilation policy issue. Note: The other possibility,
1388 // in the case that this is a blocking compile request, is to have
1389 // all subsequent blocking requesters wait for completion of
1390 // ongoing compiles. Note that in this case we'll need a protocol
1391 // for freeing the associated compile tasks. [Or we could have
1392 // a single static monitor on which all these waiters sleep.]
1393 return;
1394 }
1395
1396 // Tiered policy requires MethodCounters to exist before adding a method to
1397 // the queue. Create if we don't have them yet.
1398 if (compile_reason != CompileTask::Reason_Preload) {
1399 method->get_method_counters(thread);
1400 }
1401
1402 SCCEntry* scc_entry = find_scc_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1403 bool is_scc = (scc_entry != nullptr);
1404
1405 // Outputs from the following MutexLocker block:
1406 CompileTask* task = nullptr;
1407 CompileQueue* queue;
1408 #if INCLUDE_JVMCI
1409 if (is_c2_compile(comp_level) && compiler2()->is_jvmci() && compiler3() != nullptr &&
1410 ((JVMCICompiler*)compiler2())->force_comp_at_level_simple(method)) {
1411 assert(_c3_compile_queue != nullptr, "sanity");
1412 queue = _c3_compile_queue; // JVMCI compiler's methods compilation
1413 } else
1414 #endif
1415 queue = compile_queue(comp_level, is_scc);
1416
1417 // Acquire our lock.
1418 {
1419 ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1420
1421 // Make sure the method has not slipped into the queues since
1422 // last we checked; note that those checks were "fast bail-outs".
1423 // Here we need to be more careful, see 14012000 below.
1424 if (compilation_is_in_queue(method)) {
1425 return;
1426 }
1427
1428 // We need to check again to see if the compilation has
1429 // completed. A previous compilation may have registered
1430 // some result.
1431 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1432 return;
1433 }
1434
1435 // We now know that this compilation is not pending, complete,
1436 // or prohibited. Assign a compile_id to this compilation
1437 // and check to see if it is in our [Start..Stop) range.
1438 int compile_id = assign_compile_id(method, osr_bci);
1439 if (compile_id == 0) {
1440 // The compilation falls outside the allowed range.
1441 return;
1442 }
1443
1444 #if INCLUDE_JVMCI
1445 if (UseJVMCICompiler && blocking) {
1446 // Don't allow blocking compiles for requests triggered by JVMCI.
1447 if (thread->is_Compiler_thread()) {
1448 blocking = false;
1449 }
1450
1451 // In libjvmci, JVMCI initialization should not deadlock with other threads
1452 if (!UseJVMCINativeLibrary) {
1453 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1454 vframeStream vfst(JavaThread::cast(thread));
1455 for (; !vfst.at_end(); vfst.next()) {
1456 if (vfst.method()->is_static_initializer() ||
1457 (vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass()) &&
1458 vfst.method()->name() == vmSymbols::loadClass_name())) {
1459 blocking = false;
1460 break;
1461 }
1462 }
1463
1464 // Don't allow blocking compilation requests to JVMCI
1465 // if JVMCI itself is not yet initialized
1466 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1467 blocking = false;
1468 }
1469 }
1470
1471 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1472 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1473 // such as the DestroyJavaVM thread.
1474 if (JVMCI::in_shutdown()) {
1475 blocking = false;
1476 }
1477 }
1478 #endif // INCLUDE_JVMCI
1479
1480 // We will enter the compilation in the queue.
1481 // 14012000: Note that this sets the queued_for_compile bits in
1482 // the target method. We can now reason that a method cannot be
1483 // queued for compilation more than once, as follows:
1484 // Before a thread queues a task for compilation, it first acquires
1485 // the compile queue lock, then checks if the method's queued bits
1486 // are set or it has already been compiled. Thus there can not be two
1487 // instances of a compilation task for the same method on the
1488 // compilation queue. Consider now the case where the compilation
1489 // thread has already removed a task for that method from the queue
1490 // and is in the midst of compiling it. In this case, the
1491 // queued_for_compile bits must be set in the method (and these
1492 // will be visible to the current thread, since the bits were set
1493 // under protection of the compile queue lock, which we hold now.
1494 // When the compilation completes, the compiler thread first sets
1495 // the compilation result and then clears the queued_for_compile
1496 // bits. Neither of these actions are protected by a barrier (or done
1497 // under the protection of a lock), so the only guarantee we have
1498 // (on machines with TSO (Total Store Order)) is that these values
1499 // will update in that order. As a result, the only combinations of
1500 // these bits that the current thread will see are, in temporal order:
1501 // <RESULT, QUEUE> :
1502 // <0, 1> : in compile queue, but not yet compiled
1503 // <1, 1> : compiled but queue bit not cleared
1504 // <1, 0> : compiled and queue bit cleared
1505 // Because we first check the queue bits then check the result bits,
1506 // we are assured that we cannot introduce a duplicate task.
1507 // Note that if we did the tests in the reverse order (i.e. check
1508 // result then check queued bit), we could get the result bit before
1509 // the compilation completed, and the queue bit after the compilation
1510 // completed, and end up introducing a "duplicate" (redundant) task.
1511 // In that case, the compiler thread should first check if a method
1512 // has already been compiled before trying to compile it.
1513 // NOTE: in the event that there are multiple compiler threads and
1514 // there is de-optimization/recompilation, things will get hairy,
1515 // and in that case it's best to protect both the testing (here) of
1516 // these bits, and their updating (here and elsewhere) under a
1517 // common lock.
1518 task = create_compile_task(queue,
1519 compile_id, method,
1520 osr_bci, comp_level,
1521 hot_method, hot_count, scc_entry, compile_reason,
1522 requires_online_compilation, blocking);
1523
1524 if (task->is_scc() && (_sc_count > 0)) {
1525 // Put it on SC queue
1526 queue = is_c1_compile(comp_level) ? _sc1_compile_queue : _sc2_compile_queue;
1527 }
1528
1529 if (UseLockFreeCompileQueues) {
1530 assert(queue->lock()->owned_by_self() == false, "");
1531 queue->add_pending(task);
1532 } else {
1533 queue->add(task);
1534 }
1535 }
1536
1537 if (blocking) {
1538 wait_for_completion(task);
1539 }
1540 }
1541
1542 SCCEntry* CompileBroker::find_scc_entry(const methodHandle& method, int osr_bci, int comp_level,
1543 CompileTask::CompileReason compile_reason,
1544 bool requires_online_compilation) {
1545 SCCEntry* scc_entry = nullptr;
1546 if (_sc_count > 0 && osr_bci == InvocationEntryBci && !requires_online_compilation && SCCache::is_on_for_read()) {
1547 // Check for cached code.
1548 if (compile_reason == CompileTask::Reason_Preload) {
1549 scc_entry = method->scc_entry();
1550 assert(scc_entry != nullptr && scc_entry->for_preload(), "sanity");
1551 } else {
1552 scc_entry = SCCache::find_code_entry(method, comp_level);
1553 }
1554 }
1555 return scc_entry;
1556 }
1557
1558 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1559 int comp_level,
1560 const methodHandle& hot_method, int hot_count,
1561 bool requires_online_compilation,
1562 CompileTask::CompileReason compile_reason,
1563 TRAPS) {
1564 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1565 if (!_initialized || comp_level == CompLevel_none) {
1566 return nullptr;
1567 }
1568
1569 #if INCLUDE_JVMCI
1570 if (EnableJVMCI && UseJVMCICompiler &&
1571 comp_level == CompLevel_full_optimization && !ClassPreloader::class_preloading_finished()) {
1572 return nullptr;
1573 }
1574 #endif
1575
1576 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1577 assert(comp != nullptr, "Ensure we have a compiler");
1578
1579 #if INCLUDE_JVMCI
1580 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1581 // JVMCI compilation is not yet initializable.
1582 return nullptr;
1583 }
1584 #endif
1585
1586 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1587 // CompileBroker::compile_method can trap and can have pending async exception.
1588 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1589 DirectivesStack::release(directive);
1590 return nm;
1591 }
1592
1593 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1594 int comp_level,
1595 const methodHandle& hot_method, int hot_count,
1596 bool requires_online_compilation,
1597 CompileTask::CompileReason compile_reason,
1598 DirectiveSet* directive,
1599 TRAPS) {
1600
1601 // make sure arguments make sense
1602 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1603 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1604 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1605 assert(!method->method_holder()->is_not_initialized() ||
1606 compile_reason == CompileTask::Reason_Preload ||
1607 compile_reason == CompileTask::Reason_Precompile ||
1608 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1609 // return quickly if possible
1610
1611 if (PrecompileOnlyAndExit && !CompileTask::reason_is_precompiled(compile_reason)) {
1612 return nullptr;
1613 }
1614
1615 // lock, make sure that the compilation
1616 // isn't prohibited in a straightforward way.
1617 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1618 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1619 return nullptr;
1620 }
1621
1622 if (osr_bci == InvocationEntryBci) {
1623 // standard compilation
1624 nmethod* method_code = method->code();
1625 if (method_code != nullptr) {
1626 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1627 return method_code;
1628 }
1629 }
1630 if (method->is_not_compilable(comp_level)) {
1631 return nullptr;
1632 }
1633 } else {
1634 // osr compilation
1635 // We accept a higher level osr method
1636 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1637 if (nm != nullptr) return nm;
1638 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1639 }
1640
1641 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1642 // some prerequisites that are compiler specific
1643 if (compile_reason != CompileTask::Reason_Preload && (comp->is_c2() || comp->is_jvmci())) {
1644 InternalOOMEMark iom(THREAD);
1645 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1646 // Resolve all classes seen in the signature of the method
1647 // we are compiling.
1648 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1649 }
1650
1651 // If the method is native, do the lookup in the thread requesting
1652 // the compilation. Native lookups can load code, which is not
1653 // permitted during compilation.
1654 //
1655 // Note: A native method implies non-osr compilation which is
1656 // checked with an assertion at the entry of this method.
1657 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1658 address adr = NativeLookup::lookup(method, THREAD);
1659 if (HAS_PENDING_EXCEPTION) {
1660 // In case of an exception looking up the method, we just forget
1661 // about it. The interpreter will kick-in and throw the exception.
1662 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1663 CLEAR_PENDING_EXCEPTION;
1664 return nullptr;
1665 }
1666 assert(method->has_native_function(), "must have native code by now");
1667 }
1668
1669 // RedefineClasses() has replaced this method; just return
1670 if (method->is_old()) {
1671 return nullptr;
1672 }
1673
1674 // JVMTI -- post_compile_event requires jmethod_id() that may require
1675 // a lock the compiling thread can not acquire. Prefetch it here.
1676 if (JvmtiExport::should_post_compiled_method_load()) {
1677 method->jmethod_id();
1678 }
1679
1680 // do the compilation
1681 if (method->is_native()) {
1682 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1683 #if defined(X86) && !defined(ZERO)
1684 // The following native methods:
1685 //
1686 // java.lang.Float.intBitsToFloat
1687 // java.lang.Float.floatToRawIntBits
1688 // java.lang.Double.longBitsToDouble
1689 // java.lang.Double.doubleToRawLongBits
1690 //
1691 // are called through the interpreter even if interpreter native stubs
1692 // are not preferred (i.e., calling through adapter handlers is preferred).
1693 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1694 // if the version of the methods from the native libraries is called.
1695 // As the interpreter and the C2-intrinsified version of the methods preserves
1696 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1697 if ((UseSSE >= 1 &&
1698 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1699 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1700 (UseSSE >= 2 &&
1701 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1702 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1703 return nullptr;
1704 }
1705 #endif // X86 && !ZERO
1706
1707 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1708 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1709 //
1710 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1711 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1712 AdapterHandlerLibrary::create_native_wrapper(method);
1713 } else {
1714 return nullptr;
1715 }
1716 } else {
1717 // If the compiler is shut off due to code cache getting full
1718 // fail out now so blocking compiles dont hang the java thread
1719 if (!should_compile_new_jobs()) {
1720 return nullptr;
1721 }
1722 bool is_blocking = ReplayCompiles ||
1723 !directive->BackgroundCompilationOption ||
1724 (compile_reason == CompileTask::Reason_Precompile) ||
1725 (compile_reason == CompileTask::Reason_PrecompileForPreload);
1726 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1727 }
1728
1729 // return requested nmethod
1730 // We accept a higher level osr method
1731 if (osr_bci == InvocationEntryBci) {
1732 return method->code();
1733 }
1734 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1735 }
1736
1737
1738 // ------------------------------------------------------------------
1739 // CompileBroker::compilation_is_complete
1740 //
1741 // See if compilation of this method is already complete.
1742 bool CompileBroker::compilation_is_complete(Method* method,
1743 int osr_bci,
1744 int comp_level,
1745 bool online_only,
1746 CompileTask::CompileReason compile_reason) {
1747 if (compile_reason == CompileTask::Reason_Precompile ||
1748 compile_reason == CompileTask::Reason_PrecompileForPreload) {
1749 return false; // FIXME: any restrictions?
1750 }
1751 bool is_osr = (osr_bci != standard_entry_bci);
1752 if (is_osr) {
1753 if (method->is_not_osr_compilable(comp_level)) {
1754 return true;
1755 } else {
1756 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1757 return (result != nullptr);
1758 }
1759 } else {
1760 if (method->is_not_compilable(comp_level)) {
1761 return true;
1762 } else {
1763 nmethod* result = method->code();
1764 if (result == nullptr) {
1765 return false;
1766 }
1767 if (online_only && result->is_scc()) {
1768 return false;
1769 }
1770 bool same_level = (comp_level == result->comp_level());
1771 if (result->has_clinit_barriers()) {
1772 return !same_level; // Allow replace preloaded code with new code of the same level
1773 }
1774 return same_level;
1775 }
1776 }
1777 }
1778
1779
1780 /**
1781 * See if this compilation is already requested.
1782 *
1783 * Implementation note: there is only a single "is in queue" bit
1784 * for each method. This means that the check below is overly
1785 * conservative in the sense that an osr compilation in the queue
1786 * will block a normal compilation from entering the queue (and vice
1787 * versa). This can be remedied by a full queue search to disambiguate
1788 * cases. If it is deemed profitable, this may be done.
1789 */
1790 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1791 return method->queued_for_compilation();
1792 }
1793
1794 // ------------------------------------------------------------------
1795 // CompileBroker::compilation_is_prohibited
1796 //
1797 // See if this compilation is not allowed.
1798 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1799 bool is_native = method->is_native();
1800 // Some compilers may not support the compilation of natives.
1801 AbstractCompiler *comp = compiler(comp_level);
1802 if (is_native && (!CICompileNatives || comp == nullptr)) {
1803 method->set_not_compilable_quietly("native methods not supported", comp_level);
1804 return true;
1805 }
1806
1807 bool is_osr = (osr_bci != standard_entry_bci);
1808 // Some compilers may not support on stack replacement.
1809 if (is_osr && (!CICompileOSR || comp == nullptr)) {
1810 method->set_not_osr_compilable("OSR not supported", comp_level);
1811 return true;
1812 }
1813
1814 // The method may be explicitly excluded by the user.
1815 double scale;
1816 if (excluded || (CompilerOracle::has_option_value(method, CompileCommandEnum::CompileThresholdScaling, scale) && scale == 0)) {
1817 bool quietly = CompilerOracle::be_quiet();
1818 if (PrintCompilation && !quietly) {
1819 // This does not happen quietly...
1820 ResourceMark rm;
1821 tty->print("### Excluding %s:%s",
1822 method->is_native() ? "generation of native wrapper" : "compile",
1823 (method->is_static() ? " static" : ""));
1824 method->print_short_name(tty);
1825 tty->cr();
1826 }
1827 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1828 }
1829
1830 return false;
1831 }
1832
1833 /**
1834 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1835 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1836 * The function also allows to generate separate compilation IDs for OSR compilations.
1837 */
1838 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1839 #ifdef ASSERT
1840 bool is_osr = (osr_bci != standard_entry_bci);
1841 int id;
1842 if (method->is_native()) {
1843 assert(!is_osr, "can't be osr");
1844 // Adapters, native wrappers and method handle intrinsics
1845 // should be generated always.
1846 return Atomic::add(CICountNative ? &_native_compilation_id : &_compilation_id, 1);
1847 } else if (CICountOSR && is_osr) {
1848 id = Atomic::add(&_osr_compilation_id, 1);
1849 if (CIStartOSR <= id && id < CIStopOSR) {
1850 return id;
1851 }
1852 } else {
1853 id = Atomic::add(&_compilation_id, 1);
1854 if (CIStart <= id && id < CIStop) {
1855 return id;
1856 }
1857 }
1858
1859 // Method was not in the appropriate compilation range.
1860 method->set_not_compilable_quietly("Not in requested compile id range");
1861 return 0;
1862 #else
1863 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1864 // only _compilation_id is incremented.
1865 return Atomic::add(&_compilation_id, 1);
1866 #endif
1867 }
1868
1869 // ------------------------------------------------------------------
1870 // CompileBroker::assign_compile_id_unlocked
1871 //
1872 // Public wrapper for assign_compile_id that acquires the needed locks
1873 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1874 return assign_compile_id(method, osr_bci);
1875 }
1876
1877 // ------------------------------------------------------------------
1878 // CompileBroker::create_compile_task
1879 //
1880 // Create a CompileTask object representing the current request for
1881 // compilation. Add this task to the queue.
1882 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1883 int compile_id,
1884 const methodHandle& method,
1885 int osr_bci,
1886 int comp_level,
1887 const methodHandle& hot_method,
1888 int hot_count,
1889 SCCEntry* scc_entry,
1890 CompileTask::CompileReason compile_reason,
1891 bool requires_online_compilation,
1892 bool blocking) {
1893 CompileTask* new_task = CompileTask::allocate();
1894 new_task->initialize(compile_id, method, osr_bci, comp_level,
1895 hot_method, hot_count, scc_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 free/recycle the task
1917 */
1918 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1919 assert(UseJVMCICompiler, "sanity");
1920 MonitorLocker ml(thread, task->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, task->lock());
1989 free_task = true;
1990 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1991 ml.wait();
1992 }
1993 }
1994
1995 if (free_task) {
1996 if (is_compilation_disabled_forever()) {
1997 CompileTask::free(task);
1998 return;
1999 }
2000
2001 // It is harmless to check this status without the lock, because
2002 // completion is a stable property (until the task object is recycled).
2003 assert(task->is_complete(), "Compilation should have completed");
2004
2005 // By convention, the waiter is responsible for recycling a
2006 // blocking CompileTask. Since there is only one waiter ever
2007 // waiting on a CompileTask, we know that no one else will
2008 // be using this CompileTask; we can free it.
2009 CompileTask::free(task);
2010 }
2011 }
2012
2013 /**
2014 * Initialize compiler thread(s) + compiler object(s). The postcondition
2015 * of this function is that the compiler runtimes are initialized and that
2016 * compiler threads can start compiling.
2017 */
2018 bool CompileBroker::init_compiler_runtime() {
2019 CompilerThread* thread = CompilerThread::current();
2020 AbstractCompiler* comp = thread->compiler();
2021 // Final sanity check - the compiler object must exist
2022 guarantee(comp != nullptr, "Compiler object must exist");
2023
2024 {
2025 // Must switch to native to allocate ci_env
2026 ThreadToNativeFromVM ttn(thread);
2027 ciEnv ci_env((CompileTask*)nullptr);
2028 // Cache Jvmti state
2029 ci_env.cache_jvmti_state();
2030 // Cache DTrace flags
2031 ci_env.cache_dtrace_flags();
2032
2033 // Switch back to VM state to do compiler initialization
2034 ThreadInVMfromNative tv(thread);
2035
2036 // Perform per-thread and global initializations
2037 {
2038 MutexLocker only_one (thread, CompileThread_lock);
2039 SCCache::init_table();
2040 }
2041 comp->initialize();
2042 }
2043
2044 if (comp->is_failed()) {
2045 disable_compilation_forever();
2046 // If compiler initialization failed, no compiler thread that is specific to a
2047 // particular compiler runtime will ever start to compile methods.
2048 shutdown_compiler_runtime(comp, thread);
2049 return false;
2050 }
2051
2052 // C1 specific check
2053 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2054 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2055 return false;
2056 }
2057
2058 return true;
2059 }
2060
2061 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2062 BufferBlob* blob = thread->get_buffer_blob();
2063 if (blob != nullptr) {
2064 blob->purge();
2065 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2066 CodeCache::free(blob);
2067 }
2068 }
2069
2070 /**
2071 * If C1 and/or C2 initialization failed, we shut down all compilation.
2072 * We do this to keep things simple. This can be changed if it ever turns
2073 * out to be a problem.
2074 */
2075 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2076 free_buffer_blob_if_allocated(thread);
2077
2078 log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2079
2080 if (comp->should_perform_shutdown()) {
2081 // There are two reasons for shutting down the compiler
2082 // 1) compiler runtime initialization failed
2083 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2084 warning("%s initialization failed. Shutting down all compilers", comp->name());
2085
2086 // Only one thread per compiler runtime object enters here
2087 // Set state to shut down
2088 comp->set_shut_down();
2089
2090 // Delete all queued compilation tasks to make compiler threads exit faster.
2091 if (_c1_compile_queue != nullptr) {
2092 _c1_compile_queue->free_all();
2093 }
2094
2095 if (_c2_compile_queue != nullptr) {
2096 _c2_compile_queue->free_all();
2097 }
2098
2099 if (_c3_compile_queue != nullptr) {
2100 _c3_compile_queue->free_all();
2101 }
2102
2103 // Set flags so that we continue execution with using interpreter only.
2104 UseCompiler = false;
2105 UseInterpreter = true;
2106
2107 // We could delete compiler runtimes also. However, there are references to
2108 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
2109 // fail. This can be done later if necessary.
2110 }
2111 }
2112
2113 /**
2114 * Helper function to create new or reuse old CompileLog.
2115 */
2116 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2117 if (!LogCompilation) return nullptr;
2118
2119 AbstractCompiler *compiler = ct->compiler();
2120 bool jvmci = JVMCI_ONLY( compiler->is_jvmci() ||) false;
2121 bool c1 = compiler->is_c1();
2122 jobject* compiler_objects = c1 ? _compiler1_objects : (_c3_count == 0 ? _compiler2_objects : (jvmci ? _compiler2_objects : _compiler3_objects));
2123 assert(compiler_objects != nullptr, "must be initialized at this point");
2124 CompileLog** logs = c1 ? _compiler1_logs : (_c3_count == 0 ? _compiler2_logs : (jvmci ? _compiler2_logs : _compiler3_logs));
2125 assert(logs != nullptr, "must be initialized at this point");
2126 int count = c1 ? _c1_count : (_c3_count == 0 ? _c2_count : (jvmci ? _c2_count : _c3_count));
2127
2128 if (ct->queue() == _sc1_compile_queue || ct->queue() == _sc2_compile_queue) {
2129 compiler_objects = _sc_objects;
2130 logs = _sc_logs;
2131 count = _sc_count;
2132 }
2133 // Find Compiler number by its threadObj.
2134 oop compiler_obj = ct->threadObj();
2135 int compiler_number = 0;
2136 bool found = false;
2137 for (; compiler_number < count; compiler_number++) {
2138 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2139 found = true;
2140 break;
2141 }
2142 }
2143 assert(found, "Compiler must exist at this point");
2144
2145 // Determine pointer for this thread's log.
2146 CompileLog** log_ptr = &logs[compiler_number];
2147
2148 // Return old one if it exists.
2149 CompileLog* log = *log_ptr;
2150 if (log != nullptr) {
2151 ct->init_log(log);
2152 return log;
2153 }
2154
2155 // Create a new one and remember it.
2156 init_compiler_thread_log();
2157 log = ct->log();
2158 *log_ptr = log;
2159 return log;
2160 }
2161
2162 // ------------------------------------------------------------------
2163 // CompileBroker::compiler_thread_loop
2164 //
2165 // The main loop run by a CompilerThread.
2166 void CompileBroker::compiler_thread_loop() {
2167 CompilerThread* thread = CompilerThread::current();
2168 CompileQueue* queue = thread->queue();
2169 // For the thread that initializes the ciObjectFactory
2170 // this resource mark holds all the shared objects
2171 ResourceMark rm;
2172
2173 // First thread to get here will initialize the compiler interface
2174
2175 {
2176 ASSERT_IN_VM;
2177 MutexLocker only_one (thread, CompileThread_lock);
2178 if (!ciObjectFactory::is_initialized()) {
2179 ciObjectFactory::initialize();
2180 }
2181 }
2182
2183 // Open a log.
2184 CompileLog* log = get_log(thread);
2185 if (log != nullptr) {
2186 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
2187 thread->name(),
2188 os::current_thread_id(),
2189 os::current_process_id());
2190 log->stamp();
2191 log->end_elem();
2192 }
2193
2194 // If compiler thread/runtime initialization fails, exit the compiler thread
2195 if (!init_compiler_runtime()) {
2196 return;
2197 }
2198
2199 thread->start_idle_timer();
2200
2201 // Poll for new compilation tasks as long as the JVM runs. Compilation
2202 // should only be disabled if something went wrong while initializing the
2203 // compiler runtimes. This, in turn, should not happen. The only known case
2204 // when compiler runtime initialization fails is if there is not enough free
2205 // space in the code cache to generate the necessary stubs, etc.
2206 while (!is_compilation_disabled_forever()) {
2207 // We need this HandleMark to avoid leaking VM handles.
2208 HandleMark hm(thread);
2209
2210 CompilationPolicy::recompilation_step(RecompilationWorkUnitSize, thread);
2211
2212 CompileTask* task = queue->get(thread);
2213
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" UINTX_FORMAT "_pid%u.log",
2282 thread_id, os::current_process_id());
2283 } else {
2284 jio_snprintf(file_name, sizeof(file_name),
2285 "%s%shs_c" UINTX_FORMAT "_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='" INTX_FORMAT "' 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 ThreadInVMfromNative tivfn(JavaThread::current());
2350 }
2351 }
2352
2353 // wrapper for CodeCache::print_summary()
2354 static void codecache_print(bool detailed)
2355 {
2356 stringStream s;
2357 // Dump code cache into a buffer before locking the tty,
2358 {
2359 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2360 CodeCache::print_summary(&s, detailed);
2361 }
2362 ttyLocker ttyl;
2363 tty->print("%s", s.freeze());
2364 }
2365
2366 // wrapper for CodeCache::print_summary() using outputStream
2367 static void codecache_print(outputStream* out, bool detailed) {
2368 stringStream s;
2369
2370 // Dump code cache into a buffer
2371 {
2372 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2373 CodeCache::print_summary(&s, detailed);
2374 }
2375
2376 char* remaining_log = s.as_string();
2377 while (*remaining_log != '\0') {
2378 char* eol = strchr(remaining_log, '\n');
2379 if (eol == nullptr) {
2380 out->print_cr("%s", remaining_log);
2381 remaining_log = remaining_log + strlen(remaining_log);
2382 } else {
2383 *eol = '\0';
2384 out->print_cr("%s", remaining_log);
2385 remaining_log = eol + 1;
2386 }
2387 }
2388 }
2389
2390 void CompileBroker::handle_compile_error(CompilerThread* thread, CompileTask* task, ciEnv* ci_env,
2391 int compilable, const char* failure_reason) {
2392 if (!AbortVMOnCompilationFailure) {
2393 return;
2394 }
2395 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
2396 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
2397 }
2398 if (compilable == ciEnv::MethodCompilable_never) {
2399 fatal("Never compilable: %s", failure_reason);
2400 }
2401 }
2402
2403 static void post_compilation_event(EventCompilation& event, CompileTask* task) {
2404 assert(task != nullptr, "invariant");
2405 CompilerEvent::CompilationEvent::post(event,
2406 task->compile_id(),
2407 task->compiler()->type(),
2408 task->method(),
2409 task->comp_level(),
2410 task->is_success(),
2411 task->osr_bci() != CompileBroker::standard_entry_bci,
2412 task->nm_total_size(),
2413 task->num_inlined_bytecodes(),
2414 task->arena_bytes());
2415 }
2416
2417 int DirectivesStack::_depth = 0;
2418 CompilerDirectives* DirectivesStack::_top = nullptr;
2419 CompilerDirectives* DirectivesStack::_bottom = nullptr;
2420
2421 // Acquires Compilation_lock and waits for it to be notified
2422 // as long as WhiteBox::compilation_locked is true.
2423 static void whitebox_lock_compilation() {
2424 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2425 while (WhiteBox::compilation_locked) {
2426 locker.wait();
2427 }
2428 }
2429
2430 // ------------------------------------------------------------------
2431 // CompileBroker::invoke_compiler_on_method
2432 //
2433 // Compile a method.
2434 //
2435 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2436 task->print_ul();
2437 elapsedTimer time;
2438
2439 DirectiveSet* directive = task->directive();
2440 if (directive->PrintCompilationOption) {
2441 ResourceMark rm;
2442 task->print_tty();
2443 }
2444
2445 CompilerThread* thread = CompilerThread::current();
2446 ResourceMark rm(thread);
2447
2448 if (CompilationLog::log() != nullptr) {
2449 CompilationLog::log()->log_compile(thread, task);
2450 }
2451
2452 // Common flags.
2453 int compile_id = task->compile_id();
2454 int osr_bci = task->osr_bci();
2455 bool is_osr = (osr_bci != standard_entry_bci);
2456 bool should_log = (thread->log() != nullptr);
2457 bool should_break = false;
2458 const int task_level = task->comp_level();
2459 AbstractCompiler* comp = task->compiler();
2460 CompileTrainingData* tdata = task->training_data();
2461 assert(tdata == nullptr || TrainingData::need_data() ||
2462 CDSConfig::is_dumping_preimage_static_archive(), ""); // FIXME: MetaspaceShared::preload_and_dump() messes with RecordTraining flag
2463 {
2464 // create the handle inside it's own block so it can't
2465 // accidentally be referenced once the thread transitions to
2466 // native. The NoHandleMark before the transition should catch
2467 // any cases where this occurs in the future.
2468 methodHandle method(thread, task->method());
2469
2470 assert(!method->is_native(), "no longer compile natives");
2471
2472 // Update compile information when using perfdata.
2473 if (UsePerfData) {
2474 update_compile_perf_data(thread, method, is_osr);
2475 }
2476
2477 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2478 }
2479
2480 if (tdata != nullptr) {
2481 tdata->record_compilation_start(task);
2482 }
2483
2484 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2485 if (should_log && !directive->LogOption) {
2486 should_log = false;
2487 }
2488
2489 // Allocate a new set of JNI handles.
2490 JNIHandleMark jhm(thread);
2491 Method* target_handle = task->method();
2492 int compilable = ciEnv::MethodCompilable;
2493 const char* failure_reason = nullptr;
2494 bool failure_reason_on_C_heap = false;
2495 const char* retry_message = nullptr;
2496
2497 #if INCLUDE_JVMCI
2498 if (UseJVMCICompiler && comp != nullptr && comp->is_jvmci()) {
2499 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2500
2501 TraceTime t1("compilation", &time);
2502 EventCompilation event;
2503 JVMCICompileState compile_state(task, jvmci);
2504 JVMCIRuntime *runtime = nullptr;
2505
2506 if (JVMCI::in_shutdown()) {
2507 failure_reason = "in JVMCI shutdown";
2508 retry_message = "not retryable";
2509 compilable = ciEnv::MethodCompilable_never;
2510 } else if (compile_state.target_method_is_old()) {
2511 // Skip redefined methods
2512 failure_reason = "redefined method";
2513 retry_message = "not retryable";
2514 compilable = ciEnv::MethodCompilable_never;
2515 } else {
2516 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2517 if (env.init_error() != JNI_OK) {
2518 const char* msg = env.init_error_msg();
2519 failure_reason = os::strdup(err_msg("Error attaching to libjvmci (err: %d, %s)",
2520 env.init_error(), msg == nullptr ? "unknown" : msg), mtJVMCI);
2521 bool reason_on_C_heap = true;
2522 // In case of JNI_ENOMEM, there's a good chance a subsequent attempt to create libjvmci or attach to it
2523 // might succeed. Other errors most likely indicate a non-recoverable error in the JVMCI runtime.
2524 bool retryable = env.init_error() == JNI_ENOMEM;
2525 compile_state.set_failure(retryable, failure_reason, reason_on_C_heap);
2526 }
2527 if (failure_reason == nullptr) {
2528 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2529 // Must switch to native to block
2530 ThreadToNativeFromVM ttn(thread);
2531 whitebox_lock_compilation();
2532 }
2533 methodHandle method(thread, target_handle);
2534 runtime = env.runtime();
2535 runtime->compile_method(&env, jvmci, method, osr_bci);
2536
2537 failure_reason = compile_state.failure_reason();
2538 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2539 if (!compile_state.retryable()) {
2540 retry_message = "not retryable";
2541 compilable = ciEnv::MethodCompilable_not_at_tier;
2542 }
2543 if (!task->is_success()) {
2544 assert(failure_reason != nullptr, "must specify failure_reason");
2545 }
2546 }
2547 }
2548 if (!task->is_success() && !JVMCI::in_shutdown()) {
2549 handle_compile_error(thread, task, nullptr, compilable, failure_reason);
2550 }
2551 if (event.should_commit()) {
2552 post_compilation_event(event, task);
2553 }
2554
2555 if (runtime != nullptr) {
2556 runtime->post_compile(thread);
2557 }
2558 } else
2559 #endif // INCLUDE_JVMCI
2560 {
2561 NoHandleMark nhm;
2562 ThreadToNativeFromVM ttn(thread);
2563
2564 ciEnv ci_env(task);
2565 if (should_break) {
2566 ci_env.set_break_at_compile(true);
2567 }
2568 if (should_log) {
2569 ci_env.set_log(thread->log());
2570 }
2571 assert(thread->env() == &ci_env, "set by ci_env");
2572 // The thread-env() field is cleared in ~CompileTaskWrapper.
2573
2574 // Cache Jvmti state
2575 bool method_is_old = ci_env.cache_jvmti_state();
2576
2577 // Skip redefined methods
2578 if (method_is_old) {
2579 ci_env.record_method_not_compilable("redefined method", true);
2580 }
2581
2582 // Cache DTrace flags
2583 ci_env.cache_dtrace_flags();
2584
2585 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2586
2587 TraceTime t1("compilation", &time);
2588 EventCompilation event;
2589
2590 bool install_code = true;
2591 if (comp == nullptr) {
2592 ci_env.record_method_not_compilable("no compiler");
2593 } else if (!ci_env.failing()) {
2594 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2595 whitebox_lock_compilation();
2596 }
2597 if (StoreCachedCode && task->is_precompiled()) {
2598 install_code = false; // not suitable in the current context
2599 }
2600 comp->compile_method(&ci_env, target, osr_bci, install_code, 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 DirectivesStack::release(directive);
2613
2614 if (!ci_env.failing() && !task->is_success() && install_code) {
2615 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2616 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2617 // The compiler elected, without comment, not to register a result.
2618 // Do not attempt further compilations of this method.
2619 ci_env.record_method_not_compilable("compile failed");
2620 }
2621
2622 // Copy this bit to the enclosing block:
2623 compilable = ci_env.compilable();
2624
2625 if (ci_env.failing()) {
2626 // Duplicate the failure reason string, so that it outlives ciEnv
2627 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2628 failure_reason_on_C_heap = true;
2629 retry_message = ci_env.retry_message();
2630 ci_env.report_failure(failure_reason);
2631 }
2632
2633 if (ci_env.failing()) {
2634 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2635 }
2636 if (event.should_commit()) {
2637 post_compilation_event(event, task);
2638 }
2639 }
2640
2641 if (failure_reason != nullptr) {
2642 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2643 if (CompilationLog::log() != nullptr) {
2644 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2645 }
2646 if (PrintCompilation) {
2647 FormatBufferResource msg = retry_message != nullptr ?
2648 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2649 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2650 task->print(tty, msg);
2651 }
2652 }
2653
2654 if (tdata != nullptr) {
2655 tdata->record_compilation_end(task);
2656 }
2657
2658 methodHandle method(thread, task->method());
2659
2660 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2661
2662 collect_statistics(thread, time, task);
2663
2664 if (PrintCompilation && PrintCompilation2) {
2665 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2666 tty->print("%4d ", compile_id); // print compilation number
2667 tty->print("%s ", (is_osr ? "%" : (task->is_scc() ? "A" : " ")));
2668 if (task->is_success()) {
2669 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2670 }
2671 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2672 }
2673
2674 Log(compilation, codecache) log;
2675 if (log.is_debug()) {
2676 LogStream ls(log.debug());
2677 codecache_print(&ls, /* detailed= */ false);
2678 }
2679 if (PrintCodeCacheOnCompilation) {
2680 codecache_print(/* detailed= */ false);
2681 }
2682 // Disable compilation, if required.
2683 switch (compilable) {
2684 case ciEnv::MethodCompilable_never:
2685 if (is_osr)
2686 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2687 else
2688 method->set_not_compilable_quietly("MethodCompilable_never");
2689 break;
2690 case ciEnv::MethodCompilable_not_at_tier:
2691 if (is_osr)
2692 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2693 else
2694 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2695 break;
2696 }
2697
2698 // Note that the queued_for_compilation bits are cleared without
2699 // protection of a mutex. [They were set by the requester thread,
2700 // when adding the task to the compile queue -- at which time the
2701 // compile queue lock was held. Subsequently, we acquired the compile
2702 // queue lock to get this task off the compile queue; thus (to belabour
2703 // the point somewhat) our clearing of the bits must be occurring
2704 // only after the setting of the bits. See also 14012000 above.
2705 method->clear_queued_for_compilation();
2706 method->set_pending_queue_processed(false);
2707 }
2708
2709 /**
2710 * The CodeCache is full. Print warning and disable compilation.
2711 * Schedule code cache cleaning so compilation can continue later.
2712 * This function needs to be called only from CodeCache::allocate(),
2713 * since we currently handle a full code cache uniformly.
2714 */
2715 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2716 UseInterpreter = true;
2717 if (UseCompiler || AlwaysCompileLoopMethods ) {
2718 if (xtty != nullptr) {
2719 stringStream s;
2720 // Dump code cache state into a buffer before locking the tty,
2721 // because log_state() will use locks causing lock conflicts.
2722 CodeCache::log_state(&s);
2723 // Lock to prevent tearing
2724 ttyLocker ttyl;
2725 xtty->begin_elem("code_cache_full");
2726 xtty->print("%s", s.freeze());
2727 xtty->stamp();
2728 xtty->end_elem();
2729 }
2730
2731 #ifndef PRODUCT
2732 if (ExitOnFullCodeCache) {
2733 codecache_print(/* detailed= */ true);
2734 before_exit(JavaThread::current());
2735 exit_globals(); // will delete tty
2736 vm_direct_exit(1);
2737 }
2738 #endif
2739 if (UseCodeCacheFlushing) {
2740 // Since code cache is full, immediately stop new compiles
2741 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2742 log_info(codecache)("Code cache is full - disabling compilation");
2743 }
2744 } else {
2745 disable_compilation_forever();
2746 }
2747
2748 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2749 }
2750 }
2751
2752 // ------------------------------------------------------------------
2753 // CompileBroker::update_compile_perf_data
2754 //
2755 // Record this compilation for debugging purposes.
2756 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2757 ResourceMark rm;
2758 char* method_name = method->name()->as_C_string();
2759 char current_method[CompilerCounters::cmname_buffer_length];
2760 size_t maxLen = CompilerCounters::cmname_buffer_length;
2761
2762 const char* class_name = method->method_holder()->name()->as_C_string();
2763
2764 size_t s1len = strlen(class_name);
2765 size_t s2len = strlen(method_name);
2766
2767 // check if we need to truncate the string
2768 if (s1len + s2len + 2 > maxLen) {
2769
2770 // the strategy is to lop off the leading characters of the
2771 // class name and the trailing characters of the method name.
2772
2773 if (s2len + 2 > maxLen) {
2774 // lop of the entire class name string, let snprintf handle
2775 // truncation of the method name.
2776 class_name += s1len; // null string
2777 }
2778 else {
2779 // lop off the extra characters from the front of the class name
2780 class_name += ((s1len + s2len + 2) - maxLen);
2781 }
2782 }
2783
2784 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2785
2786 int last_compile_type = normal_compile;
2787 if (CICountOSR && is_osr) {
2788 last_compile_type = osr_compile;
2789 } else if (CICountNative && method->is_native()) {
2790 last_compile_type = native_compile;
2791 }
2792
2793 CompilerCounters* counters = thread->counters();
2794 counters->set_current_method(current_method);
2795 counters->set_compile_type((jlong) last_compile_type);
2796 }
2797
2798 // ------------------------------------------------------------------
2799 // CompileBroker::collect_statistics
2800 //
2801 // Collect statistics about the compilation.
2802
2803 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2804 bool success = task->is_success();
2805 methodHandle method (thread, task->method());
2806 int compile_id = task->compile_id();
2807 bool is_osr = (task->osr_bci() != standard_entry_bci);
2808 const int comp_level = task->comp_level();
2809 CompilerCounters* counters = thread->counters();
2810
2811 MutexLocker locker(CompileStatistics_lock);
2812
2813 // _perf variables are production performance counters which are
2814 // updated regardless of the setting of the CITime and CITimeEach flags
2815 //
2816
2817 // account all time, including bailouts and failures in this counter;
2818 // C1 and C2 counters are counting both successful and unsuccessful compiles
2819 _t_total_compilation.add(&time);
2820
2821 if (!success) {
2822 _total_bailout_count++;
2823 if (UsePerfData) {
2824 _perf_last_failed_method->set_value(counters->current_method());
2825 _perf_last_failed_type->set_value(counters->compile_type());
2826 _perf_total_bailout_count->inc();
2827 }
2828 _t_bailedout_compilation.add(&time);
2829
2830 if (CITime || log_is_enabled(Info, init)) {
2831 CompilerStatistics* stats = nullptr;
2832 if (task->is_scc()) {
2833 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2834 stats = &_scc_stats_per_level[level];
2835 } else {
2836 stats = &_stats_per_level[comp_level-1];
2837 }
2838 stats->_bailout.update(time, 0);
2839 }
2840 } else if (!task->is_success()) {
2841 if (UsePerfData) {
2842 _perf_last_invalidated_method->set_value(counters->current_method());
2843 _perf_last_invalidated_type->set_value(counters->compile_type());
2844 _perf_total_invalidated_count->inc();
2845 }
2846 _total_invalidated_count++;
2847 _t_invalidated_compilation.add(&time);
2848
2849 if (CITime || log_is_enabled(Info, init)) {
2850 CompilerStatistics* stats = nullptr;
2851 if (task->is_scc()) {
2852 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2853 stats = &_scc_stats_per_level[level];
2854 } else {
2855 stats = &_stats_per_level[comp_level-1];
2856 }
2857 stats->_invalidated.update(time, 0);
2858 }
2859 } else {
2860 // Compilation succeeded
2861
2862 // update compilation ticks - used by the implementation of
2863 // java.lang.management.CompilationMXBean
2864 _perf_total_compilation->inc(time.ticks());
2865 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2866
2867 if (CITime || log_is_enabled(Info, init)) {
2868 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2869 if (is_osr) {
2870 _t_osr_compilation.add(&time);
2871 _sum_osr_bytes_compiled += bytes_compiled;
2872 } else {
2873 _t_standard_compilation.add(&time);
2874 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2875 }
2876
2877 // Collect statistic per compilation level
2878 if (task->is_scc()) {
2879 _scc_stats._standard.update(time, bytes_compiled);
2880 _scc_stats._nmethods_size += task->nm_total_size();
2881 _scc_stats._nmethods_code_size += task->nm_insts_size();
2882 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2883 CompilerStatistics* stats = &_scc_stats_per_level[level];
2884 stats->_standard.update(time, bytes_compiled);
2885 stats->_nmethods_size += task->nm_total_size();
2886 stats->_nmethods_code_size += task->nm_insts_size();
2887 } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2888 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2889 if (is_osr) {
2890 stats->_osr.update(time, bytes_compiled);
2891 } else {
2892 stats->_standard.update(time, bytes_compiled);
2893 }
2894 stats->_nmethods_size += task->nm_total_size();
2895 stats->_nmethods_code_size += task->nm_insts_size();
2896 } else {
2897 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2898 }
2899
2900 // Collect statistic per compiler
2901 AbstractCompiler* comp = task->compiler();
2902 if (comp && !task->is_scc()) {
2903 CompilerStatistics* stats = comp->stats();
2904 if (is_osr) {
2905 stats->_osr.update(time, bytes_compiled);
2906 } else {
2907 stats->_standard.update(time, bytes_compiled);
2908 }
2909 stats->_nmethods_size += task->nm_total_size();
2910 stats->_nmethods_code_size += task->nm_insts_size();
2911 } else if (!task->is_scc()) { // if (!comp)
2912 assert(false, "Compiler object must exist");
2913 }
2914 }
2915
2916 if (UsePerfData) {
2917 // save the name of the last method compiled
2918 _perf_last_method->set_value(counters->current_method());
2919 _perf_last_compile_type->set_value(counters->compile_type());
2920 _perf_last_compile_size->set_value(method->code_size() +
2921 task->num_inlined_bytecodes());
2922 if (is_osr) {
2923 _perf_osr_compilation->inc(time.ticks());
2924 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2925 } else {
2926 _perf_standard_compilation->inc(time.ticks());
2927 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2928 }
2929 }
2930
2931 if (CITimeEach) {
2932 double compile_time = time.seconds();
2933 double bytes_per_sec = compile_time == 0.0 ? 0.0 : (double)(method->code_size() + task->num_inlined_bytecodes()) / compile_time;
2934 tty->print_cr("%3d seconds: %6.3f bytes/sec : %f (bytes %d + %d inlined)",
2935 compile_id, compile_time, bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2936 }
2937
2938 // Collect counts of successful compilations
2939 _sum_nmethod_size += task->nm_total_size();
2940 _sum_nmethod_code_size += task->nm_insts_size();
2941 _total_compile_count++;
2942
2943 if (UsePerfData) {
2944 _perf_sum_nmethod_size->inc( task->nm_total_size());
2945 _perf_sum_nmethod_code_size->inc(task->nm_insts_size());
2946 _perf_total_compile_count->inc();
2947 }
2948
2949 if (is_osr) {
2950 if (UsePerfData) _perf_total_osr_compile_count->inc();
2951 _total_osr_compile_count++;
2952 } else {
2953 if (UsePerfData) _perf_total_standard_compile_count->inc();
2954 _total_standard_compile_count++;
2955 }
2956 }
2957 // set the current method for the thread to null
2958 if (UsePerfData) counters->set_current_method("");
2959 }
2960
2961 const char* CompileBroker::compiler_name(int comp_level) {
2962 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2963 if (comp == nullptr) {
2964 return "no compiler";
2965 } else {
2966 return (comp->name());
2967 }
2968 }
2969
2970 jlong CompileBroker::total_compilation_ticks() {
2971 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2972 }
2973
2974 void CompileBroker::log_not_entrant(nmethod* nm) {
2975 _total_not_entrant_count++;
2976 if (CITime || log_is_enabled(Info, init)) {
2977 CompilerStatistics* stats = nullptr;
2978 int level = nm->comp_level();
2979 if (nm->is_scc()) {
2980 if (nm->preloaded()) {
2981 assert(level == CompLevel_full_optimization, "%d", level);
2982 level = CompLevel_full_optimization + 1;
2983 }
2984 stats = &_scc_stats_per_level[level - 1];
2985 } else {
2986 stats = &_stats_per_level[level - 1];
2987 }
2988 stats->_made_not_entrant._count++;
2989 }
2990 }
2991
2992 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2993 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}",
2994 name, stats->bytes_per_second(),
2995 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2996 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2997 stats->_nmethods_size, stats->_nmethods_code_size);
2998 }
2999
3000 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
3001 if (data._count > 0) {
3002 st->print("; %s: %4u methods", name, data._count);
3003 if (print_time) {
3004 st->print(" (in %.3fs)", data._time.seconds());
3005 }
3006 }
3007 }
3008
3009 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
3010 st->print(" %s%d: %5u methods", prefix, tier, stats->_standard._count);
3011 if (stats->_standard._count > 0) {
3012 st->print(" (in %.3fs)", stats->_standard._time.seconds());
3013 }
3014 print_helper(st, "osr", stats->_osr);
3015 print_helper(st, "bailout", stats->_bailout);
3016 print_helper(st, "invalid", stats->_invalidated);
3017 print_helper(st, "not_entrant", stats->_made_not_entrant, false);
3018 st->cr();
3019 }
3020
3021 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3022 if (queue != nullptr) {
3023 MutexLocker ml(queue->lock());
3024
3025 uint total_cnt = 0;
3026 uint active_cnt = 0;
3027 for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3028 guarantee(jt != nullptr, "");
3029 if (jt->is_Compiler_thread()) {
3030 CompilerThread* ct = (CompilerThread*)jt;
3031
3032 guarantee(ct != nullptr, "");
3033 if (ct->queue() == queue) {
3034 ++total_cnt;
3035 CompileTask* task = ct->task();
3036 if (task != nullptr) {
3037 ++active_cnt;
3038 }
3039 }
3040 }
3041 }
3042
3043 st->print(" %s (%d active / %d total threads): %u tasks",
3044 queue->name(), active_cnt, total_cnt, queue->size());
3045 if (queue->size() > 0) {
3046 uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3047 for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3048 int tier = task->comp_level();
3049 if (task->is_scc() && task->preload()) {
3050 assert(tier == CompLevel_full_optimization, "%d", tier);
3051 tier = CompLevel_full_optimization + 1;
3052 }
3053 counts[tier-1]++;
3054 }
3055 st->print(":");
3056 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3057 uint cnt = counts[tier-1];
3058 if (cnt > 0) {
3059 st->print(" T%d: %u tasks;", tier, cnt);
3060 }
3061 }
3062 }
3063 st->cr();
3064
3065 // for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3066 // guarantee(jt != nullptr, "");
3067 // if (jt->is_Compiler_thread()) {
3068 // CompilerThread* ct = (CompilerThread*)jt;
3069 //
3070 // guarantee(ct != nullptr, "");
3071 // if (ct->queue() == queue) {
3072 // ResourceMark rm;
3073 // CompileTask* task = ct->task();
3074 // st->print(" %s: ", ct->name_raw());
3075 // if (task != nullptr) {
3076 // task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3077 // }
3078 // st->cr();
3079 // }
3080 // }
3081 // }
3082 }
3083 }
3084 void CompileBroker::print_statistics_on(outputStream* st) {
3085 st->print_cr(" Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3086 _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3087 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3088 print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3089 }
3090 st->cr();
3091
3092 if (LoadCachedCode || StoreCachedCode) {
3093 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3094 if (tier != CompLevel_full_profile) {
3095 print_tier_helper(st, "SC T", tier, &_scc_stats_per_level[tier - 1]);
3096 }
3097 }
3098 st->cr();
3099 }
3100
3101 print_queue_info(st, _c1_compile_queue);
3102 print_queue_info(st, _c2_compile_queue);
3103 print_queue_info(st, _c3_compile_queue);
3104 print_queue_info(st, _sc1_compile_queue);
3105 print_queue_info(st, _sc2_compile_queue);
3106 }
3107
3108 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3109 if (per_compiler) {
3110 if (aggregate) {
3111 tty->cr();
3112 tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3113 tty->print_cr("------------------------------------------------");
3114 tty->cr();
3115 }
3116 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3117 AbstractCompiler* comp = _compilers[i];
3118 if (comp != nullptr) {
3119 print_times(comp->name(), comp->stats());
3120 }
3121 }
3122 if (_scc_stats._standard._count > 0) {
3123 print_times("SC", &_scc_stats);
3124 }
3125 if (aggregate) {
3126 tty->cr();
3127 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3128 tty->print_cr("------------------------------------------------");
3129 tty->cr();
3130 }
3131 char tier_name[256];
3132 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3133 CompilerStatistics* stats = &_stats_per_level[tier-1];
3134 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3135 print_times(tier_name, stats);
3136 }
3137 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3138 CompilerStatistics* stats = &_scc_stats_per_level[tier-1];
3139 if (stats->_standard._bytes > 0) {
3140 os::snprintf_checked(tier_name, sizeof(tier_name), "SC T%d", tier);
3141 print_times(tier_name, stats);
3142 }
3143 }
3144 }
3145
3146 if (!aggregate) {
3147 return;
3148 }
3149
3150 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3151 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3152 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3153
3154 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3155 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3156
3157 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3158 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3159 uint total_compile_count = CompileBroker::_total_compile_count;
3160 uint total_bailout_count = CompileBroker::_total_bailout_count;
3161 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3162
3163 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
3164 uint nmethods_size = CompileBroker::_sum_nmethod_size;
3165
3166 tty->cr();
3167 tty->print_cr("Accumulated compiler times");
3168 tty->print_cr("----------------------------------------------------------");
3169 //0000000000111111111122222222223333333333444444444455555555556666666666
3170 //0123456789012345678901234567890123456789012345678901234567890123456789
3171 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
3172 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
3173 standard_compilation.seconds(),
3174 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3175 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
3176 CompileBroker::_t_bailedout_compilation.seconds(),
3177 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3178 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
3179 osr_compilation.seconds(),
3180 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3181 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
3182 CompileBroker::_t_invalidated_compilation.seconds(),
3183 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3184
3185 if (StoreCachedCode || LoadCachedCode) { // Check flags because SC cache could be closed already
3186 tty->cr();
3187 SCCache::print_timers_on(tty);
3188 }
3189 AbstractCompiler *comp = compiler(CompLevel_simple);
3190 if (comp != nullptr) {
3191 tty->cr();
3192 comp->print_timers();
3193 }
3194 comp = compiler(CompLevel_full_optimization);
3195 if (comp != nullptr) {
3196 tty->cr();
3197 comp->print_timers();
3198 }
3199 comp = _compilers[2];
3200 if (comp != nullptr) {
3201 tty->cr();
3202 comp->print_timers();
3203 }
3204 #if INCLUDE_JVMCI
3205 if (EnableJVMCI) {
3206 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3207 if (jvmci_comp != nullptr && jvmci_comp != comp) {
3208 tty->cr();
3209 jvmci_comp->print_timers();
3210 }
3211 }
3212 #endif
3213
3214 tty->cr();
3215 tty->print_cr(" Total compiled methods : %8u methods", total_compile_count);
3216 tty->print_cr(" Standard compilation : %8u methods", standard_compile_count);
3217 tty->print_cr(" On stack replacement : %8u methods", osr_compile_count);
3218 uint tcb = osr_bytes_compiled + standard_bytes_compiled;
3219 tty->print_cr(" Total compiled bytecodes : %8u bytes", tcb);
3220 tty->print_cr(" Standard compilation : %8u bytes", standard_bytes_compiled);
3221 tty->print_cr(" On stack replacement : %8u bytes", osr_bytes_compiled);
3222 double tcs = total_compilation.seconds();
3223 uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
3224 tty->print_cr(" Average compilation speed : %8u bytes/s", bps);
3225 tty->cr();
3226 tty->print_cr(" nmethod code size : %8u bytes", nmethods_code_size);
3227 tty->print_cr(" nmethod total size : %8u bytes", nmethods_size);
3228 }
3229
3230 // Print general/accumulated JIT information.
3231 void CompileBroker::print_info(outputStream *out) {
3232 if (out == nullptr) out = tty;
3233 out->cr();
3234 out->print_cr("======================");
3235 out->print_cr(" General JIT info ");
3236 out->print_cr("======================");
3237 out->cr();
3238 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
3239 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
3240 out->cr();
3241 out->print_cr("CodeCache overview");
3242 out->print_cr("--------------------------------------------------------");
3243 out->cr();
3244 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
3245 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
3246 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
3247 out->cr();
3248 }
3249
3250 // Note: tty_lock must not be held upon entry to this function.
3251 // Print functions called from herein do "micro-locking" on tty_lock.
3252 // That's a tradeoff which keeps together important blocks of output.
3253 // At the same time, continuous tty_lock hold time is kept in check,
3254 // preventing concurrently printing threads from stalling a long time.
3255 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
3256 TimeStamp ts_total;
3257 TimeStamp ts_global;
3258 TimeStamp ts;
3259
3260 bool allFun = !strcmp(function, "all");
3261 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
3262 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
3263 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
3264 bool methodCount = !strcmp(function, "MethodCount") || allFun;
3265 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
3266 bool methodAge = !strcmp(function, "MethodAge") || allFun;
3267 bool methodNames = !strcmp(function, "MethodNames") || allFun;
3268 bool discard = !strcmp(function, "discard") || allFun;
3269
3270 if (out == nullptr) {
3271 out = tty;
3272 }
3273
3274 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
3275 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
3276 out->cr();
3277 return;
3278 }
3279
3280 ts_total.update(); // record starting point
3281
3282 if (aggregate) {
3283 print_info(out);
3284 }
3285
3286 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
3287 // That prevents other threads from destroying (making inconsistent) our view on the CodeHeap.
3288 // When we request individual parts of the analysis via the jcmd interface, it is possible
3289 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
3290 // updated the aggregated data. We will then see a modified, but again consistent, view
3291 // on the CodeHeap. That's a tolerable tradeoff we have to accept because we can't hold
3292 // a lock across user interaction.
3293
3294 // We should definitely acquire this lock before acquiring Compile_lock and CodeCache_lock.
3295 // CodeHeapStateAnalytics_lock may be held by a concurrent thread for a long time,
3296 // leading to an unnecessarily long hold time of the other locks we acquired before.
3297 ts.update(); // record starting point
3298 MutexLocker mu0(CodeHeapStateAnalytics_lock, Mutex::_safepoint_check_flag);
3299 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
3300
3301 // Holding the CodeCache_lock protects from concurrent alterations of the CodeCache.
3302 // Unfortunately, such protection is not sufficient:
3303 // When a new nmethod is created via ciEnv::register_method(), the
3304 // Compile_lock is taken first. After some initializations,
3305 // nmethod::new_nmethod() takes over, grabbing the CodeCache_lock
3306 // immediately (after finalizing the oop references). To lock out concurrent
3307 // modifiers, we have to grab both locks as well in the described sequence.
3308 //
3309 // If we serve an "allFun" call, it is beneficial to hold CodeCache_lock and Compile_lock
3310 // for the entire duration of aggregation and printing. That makes sure we see
3311 // a consistent picture and do not run into issues caused by concurrent alterations.
3312 bool should_take_Compile_lock = !SafepointSynchronize::is_at_safepoint() &&
3313 !Compile_lock->owned_by_self();
3314 bool should_take_CodeCache_lock = !SafepointSynchronize::is_at_safepoint() &&
3315 !CodeCache_lock->owned_by_self();
3316 bool take_global_lock_1 = allFun && should_take_Compile_lock;
3317 bool take_global_lock_2 = allFun && should_take_CodeCache_lock;
3318 bool take_function_lock_1 = !allFun && should_take_Compile_lock;
3319 bool take_function_lock_2 = !allFun && should_take_CodeCache_lock;
3320 bool take_global_locks = take_global_lock_1 || take_global_lock_2;
3321 bool take_function_locks = take_function_lock_1 || take_function_lock_2;
3322
3323 ts_global.update(); // record starting point
3324
3325 ConditionalMutexLocker mu1(Compile_lock, take_global_lock_1, Mutex::_safepoint_check_flag);
3326 ConditionalMutexLocker mu2(CodeCache_lock, take_global_lock_2, Mutex::_no_safepoint_check_flag);
3327 if (take_global_locks) {
3328 out->print_cr("\n__ Compile & CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
3329 ts_global.update(); // record starting point
3330 }
3331
3332 if (aggregate) {
3333 ts.update(); // record starting point
3334 ConditionalMutexLocker mu11(Compile_lock, take_function_lock_1, Mutex::_safepoint_check_flag);
3335 ConditionalMutexLocker mu22(CodeCache_lock, take_function_lock_2, Mutex::_no_safepoint_check_flag);
3336 if (take_function_locks) {
3337 out->print_cr("\n__ Compile & CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
3338 }
3339
3340 ts.update(); // record starting point
3341 CodeCache::aggregate(out, granularity);
3342 if (take_function_locks) {
3343 out->print_cr("\n__ Compile & CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
3344 }
3345 }
3346
3347 if (usedSpace) CodeCache::print_usedSpace(out);
3348 if (freeSpace) CodeCache::print_freeSpace(out);
3349 if (methodCount) CodeCache::print_count(out);
3350 if (methodSpace) CodeCache::print_space(out);
3351 if (methodAge) CodeCache::print_age(out);
3352 if (methodNames) {
3353 if (allFun) {
3354 // print_names() can only be used safely if the locks have been continuously held
3355 // since aggregation begin. That is true only for function "all".
3356 CodeCache::print_names(out);
3357 } else {
3358 out->print_cr("\nCodeHeapStateAnalytics: Function 'MethodNames' is only available as part of function 'all'");
3359 }
3360 }
3361 if (discard) CodeCache::discard(out);
3362
3363 if (take_global_locks) {
3364 out->print_cr("\n__ Compile & CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
3365 }
3366 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
3367 }