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/aotLinkedClassBulkLoader.hpp"
27 #include "cds/cdsConfig.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 "compiler/recompilationPolicy.hpp"
46 #include "gc/shared/memAllocator.hpp"
47 #include "interpreter/linkResolver.hpp"
48 #include "jvm.h"
49 #include "jfr/jfrEvents.hpp"
50 #include "logging/log.hpp"
51 #include "logging/logStream.hpp"
52 #include "memory/allocation.inline.hpp"
53 #include "memory/resourceArea.hpp"
54 #include "memory/universe.hpp"
55 #include "oops/methodData.hpp"
56 #include "oops/method.inline.hpp"
57 #include "oops/oop.inline.hpp"
58 #include "prims/jvmtiExport.hpp"
59 #include "prims/nativeLookup.hpp"
60 #include "prims/whitebox.hpp"
61 #include "runtime/atomic.hpp"
62 #include "runtime/escapeBarrier.hpp"
63 #include "runtime/globals_extension.hpp"
64 #include "runtime/handles.inline.hpp"
65 #include "runtime/init.hpp"
66 #include "runtime/interfaceSupport.inline.hpp"
67 #include "runtime/java.hpp"
68 #include "runtime/javaCalls.hpp"
69 #include "runtime/jniHandles.inline.hpp"
70 #include "runtime/os.hpp"
71 #include "runtime/perfData.hpp"
72 #include "runtime/safepointVerifiers.hpp"
73 #include "runtime/sharedRuntime.hpp"
74 #include "runtime/threads.hpp"
75 #include "runtime/threadSMR.inline.hpp"
76 #include "runtime/timerTrace.hpp"
77 #include "runtime/vframe.inline.hpp"
78 #include "services/management.hpp"
79 #include "utilities/debug.hpp"
80 #include "utilities/dtrace.hpp"
81 #include "utilities/events.hpp"
82 #include "utilities/formatBuffer.hpp"
83 #include "utilities/macros.hpp"
84 #include "utilities/nonblockingQueue.inline.hpp"
85 #ifdef COMPILER1
86 #include "c1/c1_Compiler.hpp"
87 #endif
88 #ifdef COMPILER2
89 #include "opto/c2compiler.hpp"
90 #endif
91 #if INCLUDE_JVMCI
92 #include "jvmci/jvmciEnv.hpp"
93 #include "jvmci/jvmciRuntime.hpp"
94 #endif
95
96 #ifdef DTRACE_ENABLED
97
98 // Only bother with this argument setup if dtrace is available
99
100 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
101 { \
102 Symbol* klass_name = (method)->klass_name(); \
103 Symbol* name = (method)->name(); \
104 Symbol* signature = (method)->signature(); \
105 HOTSPOT_METHOD_COMPILE_BEGIN( \
106 (char *) comp_name, strlen(comp_name), \
107 (char *) klass_name->bytes(), klass_name->utf8_length(), \
108 (char *) name->bytes(), name->utf8_length(), \
109 (char *) signature->bytes(), signature->utf8_length()); \
110 }
111
112 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
113 { \
114 Symbol* klass_name = (method)->klass_name(); \
115 Symbol* name = (method)->name(); \
116 Symbol* signature = (method)->signature(); \
117 HOTSPOT_METHOD_COMPILE_END( \
118 (char *) comp_name, strlen(comp_name), \
119 (char *) klass_name->bytes(), klass_name->utf8_length(), \
120 (char *) name->bytes(), name->utf8_length(), \
121 (char *) signature->bytes(), signature->utf8_length(), (success)); \
122 }
123
124 #else // ndef DTRACE_ENABLED
125
126 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
127 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
128
129 #endif // ndef DTRACE_ENABLED
130
131 bool CompileBroker::_initialized = false;
132 bool CompileBroker::_replay_initialized = false;
133 volatile bool CompileBroker::_should_block = false;
134 volatile int CompileBroker::_print_compilation_warning = 0;
135 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
136
137 // The installed compiler(s)
138 AbstractCompiler* CompileBroker::_compilers[3];
139
140 // The maximum numbers of compiler threads to be determined during startup.
141 int CompileBroker::_c1_count = 0;
142 int CompileBroker::_c2_count = 0;
143 int CompileBroker::_c3_count = 0;
144 int CompileBroker::_sc_count = 0;
145
146 // An array of compiler names as Java String objects
147 jobject* CompileBroker::_compiler1_objects = nullptr;
148 jobject* CompileBroker::_compiler2_objects = nullptr;
149 jobject* CompileBroker::_compiler3_objects = nullptr;
150 jobject* CompileBroker::_sc_objects = nullptr;
151
152 CompileLog** CompileBroker::_compiler1_logs = nullptr;
153 CompileLog** CompileBroker::_compiler2_logs = nullptr;
154 CompileLog** CompileBroker::_compiler3_logs = nullptr;
155 CompileLog** CompileBroker::_sc_logs = nullptr;
156
157 // These counters are used to assign an unique ID to each compilation.
158 volatile jint CompileBroker::_compilation_id = 0;
159 volatile jint CompileBroker::_osr_compilation_id = 0;
160 volatile jint CompileBroker::_native_compilation_id = 0;
161
162 // Performance counters
163 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
164 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
165 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
166
167 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
168 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
169 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
170 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
171 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
172
173 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
174 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
175 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
176 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
177
178 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
179 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
180 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
181 PerfVariable* CompileBroker::_perf_last_compile_type = nullptr;
182 PerfVariable* CompileBroker::_perf_last_compile_size = nullptr;
183 PerfVariable* CompileBroker::_perf_last_failed_type = nullptr;
184 PerfVariable* CompileBroker::_perf_last_invalidated_type = nullptr;
185
186 // Timers and counters for generating statistics
187 elapsedTimer CompileBroker::_t_total_compilation;
188 elapsedTimer CompileBroker::_t_osr_compilation;
189 elapsedTimer CompileBroker::_t_standard_compilation;
190 elapsedTimer CompileBroker::_t_invalidated_compilation;
191 elapsedTimer CompileBroker::_t_bailedout_compilation;
192
193 uint CompileBroker::_total_bailout_count = 0;
194 uint CompileBroker::_total_invalidated_count = 0;
195 uint CompileBroker::_total_not_entrant_count = 0;
196 uint CompileBroker::_total_compile_count = 0;
197 uint CompileBroker::_total_osr_compile_count = 0;
198 uint CompileBroker::_total_standard_compile_count = 0;
199 uint CompileBroker::_total_compiler_stopped_count = 0;
200 uint CompileBroker::_total_compiler_restarted_count = 0;
201
202 uint CompileBroker::_sum_osr_bytes_compiled = 0;
203 uint CompileBroker::_sum_standard_bytes_compiled = 0;
204 uint CompileBroker::_sum_nmethod_size = 0;
205 uint CompileBroker::_sum_nmethod_code_size = 0;
206
207 jlong CompileBroker::_peak_compilation_time = 0;
208
209 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
210 CompilerStatistics CompileBroker::_scc_stats;
211 CompilerStatistics CompileBroker::_scc_stats_per_level[CompLevel_full_optimization + 1];
212
213 CompileQueue* CompileBroker::_c3_compile_queue = nullptr;
214 CompileQueue* CompileBroker::_c2_compile_queue = nullptr;
215 CompileQueue* CompileBroker::_c1_compile_queue = nullptr;
216 CompileQueue* CompileBroker::_sc1_compile_queue = nullptr;
217 CompileQueue* CompileBroker::_sc2_compile_queue = nullptr;
218
219 bool compileBroker_init() {
220 if (LogEvents) {
221 CompilationLog::init();
222 }
223
224 // init directives stack, adding default directive
225 DirectivesStack::init();
226
227 if (DirectivesParser::has_file()) {
228 return DirectivesParser::parse_from_flag();
229 } else if (CompilerDirectivesPrint) {
230 // Print default directive even when no other was added
231 DirectivesStack::print(tty);
232 }
233
234 return true;
235 }
236
237 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
238 CompilerThread* thread = CompilerThread::current();
239 thread->set_task(task);
240 CompileLog* log = thread->log();
241 if (log != nullptr && !task->is_unloaded()) task->log_task_start(log);
242 }
243
244 CompileTaskWrapper::~CompileTaskWrapper() {
245 CompilerThread* thread = CompilerThread::current();
246 CompileTask* task = thread->task();
247 CompileLog* log = thread->log();
248 AbstractCompiler* comp = thread->compiler();
249 if (log != nullptr && !task->is_unloaded()) task->log_task_done(log);
250 thread->set_task(nullptr);
251 thread->set_env(nullptr);
252 if (task->is_blocking()) {
253 bool free_task = false;
254 {
255 MutexLocker notifier(thread, task->lock());
256 task->mark_complete();
257 #if INCLUDE_JVMCI
258 if (comp->is_jvmci()) {
259 if (!task->has_waiter()) {
260 // The waiting thread timed out and thus did not free the task.
261 free_task = true;
262 }
263 task->set_blocking_jvmci_compile_state(nullptr);
264 }
265 #endif
266 if (!free_task) {
267 // Notify the waiting thread that the compilation has completed
268 // so that it can free the task.
269 task->lock()->notify_all();
270 }
271 }
272 if (free_task) {
273 // The task can only be freed once the task lock is released.
274 CompileTask::free(task);
275 }
276 } else {
277 task->mark_complete();
278
279 // By convention, the compiling thread is responsible for
280 // recycling a non-blocking CompileTask.
281 CompileTask::free(task);
282 }
283 }
284
285 /**
286 * Check if a CompilerThread can be removed and update count if requested.
287 */
288 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
289 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
290 if (!ReduceNumberOfCompilerThreads) return false;
291
292 if (RecompilationPolicy::have_recompilation_work()) return false;
293
294 AbstractCompiler *compiler = ct->compiler();
295 int compiler_count = compiler->num_compiler_threads();
296 bool c1 = compiler->is_c1();
297
298 // Keep at least 1 compiler thread of each type.
299 if (compiler_count < 2) return false;
300
301 // Keep thread alive for at least some time.
302 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
303
304 #if INCLUDE_JVMCI
305 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
306 // Handles for JVMCI thread objects may get released concurrently.
307 if (do_it) {
308 assert(CompileThread_lock->owner() == ct, "must be holding lock");
309 } else {
310 // Skip check if it's the last thread and let caller check again.
311 return true;
312 }
313 }
314 #endif
315
316 // We only allow the last compiler thread of each type to get removed.
317 jobject last_compiler = c1 ? compiler1_object(compiler_count - 1)
318 : compiler2_object(compiler_count - 1);
319 if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) {
320 if (do_it) {
321 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
322 compiler->set_num_compiler_threads(compiler_count - 1);
323 #if INCLUDE_JVMCI
324 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
325 // Old j.l.Thread object can die when no longer referenced elsewhere.
326 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
327 _compiler2_objects[compiler_count - 1] = nullptr;
328 }
329 #endif
330 }
331 return true;
332 }
333 return false;
334 }
335
336 /**
337 * Add a CompileTask to a CompileQueue.
338 */
339 void CompileQueue::add(CompileTask* task) {
340 assert(_lock->owned_by_self(), "must own lock");
341
342 task->set_next(nullptr);
343 task->set_prev(nullptr);
344
345 if (_last == nullptr) {
346 // The compile queue is empty.
347 assert(_first == nullptr, "queue is empty");
348 _first = task;
349 _last = task;
350 } else {
351 // Append the task to the queue.
352 assert(_last->next() == nullptr, "not last");
353 _last->set_next(task);
354 task->set_prev(_last);
355 _last = task;
356 }
357 ++_size;
358 ++_total_added;
359 if (_size > _peak_size) {
360 _peak_size = _size;
361 }
362
363 // Mark the method as being in the compile queue.
364 task->method()->set_queued_for_compilation();
365
366 task->mark_queued(os::elapsed_counter());
367
368 if (CIPrintCompileQueue) {
369 print_tty();
370 }
371
372 if (LogCompilation && xtty != nullptr) {
373 task->log_task_queued();
374 }
375
376 if (TrainingData::need_data() &&
377 !CDSConfig::is_dumping_final_static_archive()) { // FIXME: !!! MetaspaceShared::preload_and_dump() temporarily enables RecordTraining !!!
378 CompileTrainingData* tdata = CompileTrainingData::make(task);
379 if (tdata != nullptr) {
380 task->set_training_data(tdata);
381 }
382 }
383
384 // Notify CompilerThreads that a task is available.
385 _lock->notify_all();
386 }
387
388 void CompileQueue::add_pending(CompileTask* task) {
389 assert(_lock->owned_by_self() == false, "must NOT own lock");
390 assert(UseLockFreeCompileQueues, "");
391 task->method()->set_queued_for_compilation();
392 _queue.push(*task);
393 // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
394 if (is_empty()) {
395 MutexLocker ml(_lock);
396 _lock->notify_all();
397 }
398 }
399
400 static bool process_pending(CompileTask* task) {
401 // guarantee(task->method()->queued_for_compilation(), "");
402 if (task->is_unloaded()) {
403 return true; // unloaded
404 }
405 task->method()->set_queued_for_compilation(); // FIXME
406 if (task->method()->pending_queue_processed()) {
407 return true; // already queued
408 }
409 // Mark the method as being in the compile queue.
410 task->method()->set_pending_queue_processed();
411 if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
412 task->requires_online_compilation(), task->compile_reason())) {
413 return true; // already compiled
414 }
415 return false; // active
416 }
417
418 void CompileQueue::transfer_pending() {
419 assert(_lock->owned_by_self(), "must own lock");
420 while (!_queue.empty()) {
421 CompileTask* task = _queue.pop();
422 bool is_stale = process_pending(task);
423 if (is_stale) {
424 task->set_next(_first_stale);
425 task->set_prev(nullptr);
426 _first_stale = task;
427 } else {
428 add(task);
429 }
430 }
431 }
432
433 /**
434 * Empties compilation queue by putting all compilation tasks onto
435 * a freelist. Furthermore, the method wakes up all threads that are
436 * waiting on a compilation task to finish. This can happen if background
437 * compilation is disabled.
438 */
439 void CompileQueue::free_all() {
440 MutexLocker mu(_lock);
441 transfer_pending();
442
443 CompileTask* next = _first;
444
445 // Iterate over all tasks in the compile queue
446 while (next != nullptr) {
447 CompileTask* current = next;
448 next = current->next();
449 {
450 // Wake up thread that blocks on the compile task.
451 MutexLocker ct_lock(current->lock());
452 current->lock()->notify();
453 }
454 // Put the task back on the freelist.
455 CompileTask::free(current);
456 }
457 _first = nullptr;
458 _last = nullptr;
459
460 // Wake up all threads that block on the queue.
461 _lock->notify_all();
462 }
463
464 /**
465 * Get the next CompileTask from a CompileQueue
466 */
467 CompileTask* CompileQueue::get(CompilerThread* thread) {
468 // save methods from RedefineClasses across safepoint
469 // across compile queue lock below.
470 methodHandle save_method;
471 methodHandle save_hot_method;
472
473 MonitorLocker locker(_lock);
474 transfer_pending();
475
476 RecompilationPolicy::sample_load_average();
477
478 // If _first is null we have no more compile jobs. There are two reasons for
479 // having no compile jobs: First, we compiled everything we wanted. Second,
480 // we ran out of code cache so compilation has been disabled. In the latter
481 // case we perform code cache sweeps to free memory such that we can re-enable
482 // compilation.
483 while (_first == nullptr) {
484 // Exit loop if compilation is disabled forever
485 if (CompileBroker::is_compilation_disabled_forever()) {
486 return nullptr;
487 }
488
489 AbstractCompiler* compiler = thread->compiler();
490 guarantee(compiler != nullptr, "Compiler object must exist");
491 compiler->on_empty_queue(this, thread);
492 if (_first != nullptr) {
493 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
494 // so check again whether any tasks were added to the queue.
495 break;
496 }
497
498 // If there are no compilation tasks and we can compile new jobs
499 // (i.e., there is enough free space in the code cache) there is
500 // no need to invoke the GC.
501 // We need a timed wait here, since compiler threads can exit if compilation
502 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
503 // is not critical and we do not want idle compiler threads to wake up too often.
504 locker.wait(5*1000);
505
506 transfer_pending(); // reacquired lock
507
508 if (RecompilationPolicy::have_recompilation_work()) return nullptr;
509
510 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
511 // Still nothing to compile. Give caller a chance to stop this thread.
512 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
513 }
514 }
515
516 if (CompileBroker::is_compilation_disabled_forever()) {
517 return nullptr;
518 }
519
520 CompileTask* task;
521 {
522 NoSafepointVerifier nsv;
523 task = CompilationPolicy::select_task(this, thread);
524 if (task != nullptr) {
525 task = task->select_for_compilation();
526 }
527 }
528
529 if (task != nullptr) {
530 // Save method pointers across unlock safepoint. The task is removed from
531 // the compilation queue, which is walked during RedefineClasses.
532 Thread* thread = Thread::current();
533 save_method = methodHandle(thread, task->method());
534 save_hot_method = methodHandle(thread, task->hot_method());
535
536 remove(task);
537 }
538 purge_stale_tasks(); // may temporarily release MCQ lock
539 return task;
540 }
541
542 // Clean & deallocate stale compile tasks.
543 // Temporarily releases MethodCompileQueue lock.
544 void CompileQueue::purge_stale_tasks() {
545 assert(_lock->owned_by_self(), "must own lock");
546 if (_first_stale != nullptr) {
547 // Stale tasks are purged when MCQ lock is released,
548 // but _first_stale updates are protected by MCQ lock.
549 // Once task processing starts and MCQ lock is released,
550 // other compiler threads can reuse _first_stale.
551 CompileTask* head = _first_stale;
552 _first_stale = nullptr;
553 {
554 MutexUnlocker ul(_lock);
555 for (CompileTask* task = head; task != nullptr; ) {
556 CompileTask* next_task = task->next();
557 CompileTaskWrapper ctw(task); // Frees the task
558 task->set_failure_reason("stale task");
559 task = next_task;
560 }
561 }
562 transfer_pending(); // transfer pending after reacquiring MCQ lock
563 }
564 }
565
566 void CompileQueue::remove(CompileTask* task) {
567 assert(_lock->owned_by_self(), "must own lock");
568 if (task->prev() != nullptr) {
569 task->prev()->set_next(task->next());
570 } else {
571 // max is the first element
572 assert(task == _first, "Sanity");
573 _first = task->next();
574 }
575
576 if (task->next() != nullptr) {
577 task->next()->set_prev(task->prev());
578 } else {
579 // max is the last element
580 assert(task == _last, "Sanity");
581 _last = task->prev();
582 }
583 --_size;
584 ++_total_removed;
585 }
586
587 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
588 assert(_lock->owned_by_self(), "must own lock");
589 remove(task);
590
591 // Enqueue the task for reclamation (should be done outside MCQ lock)
592 task->set_next(_first_stale);
593 task->set_prev(nullptr);
594 _first_stale = task;
595 }
596
597 // methods in the compile queue need to be marked as used on the stack
598 // so that they don't get reclaimed by Redefine Classes
599 void CompileQueue::mark_on_stack() {
600 for (CompileTask* task = _first; task != nullptr; task = task->next()) {
601 task->mark_on_stack();
602 }
603 for (CompileTask* task = _queue.first(); !_queue.is_end(task); task = task->next()) {
604 assert(task != nullptr, "");
605 task->mark_on_stack();
606 }
607 }
608
609
610 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_scc) {
611 if (is_c2_compile(comp_level)) return ((is_scc && (_sc_count > 0)) ? _sc2_compile_queue : _c2_compile_queue);
612 if (is_c1_compile(comp_level)) return ((is_scc && (_sc_count > 0)) ? _sc1_compile_queue : _c1_compile_queue);
613 return nullptr;
614 }
615
616 CompileQueue* CompileBroker::c1_compile_queue() {
617 return _c1_compile_queue;
618 }
619
620 CompileQueue* CompileBroker::c2_compile_queue() {
621 return _c2_compile_queue;
622 }
623
624 void CompileBroker::print_compile_queues(outputStream* st) {
625 st->print_cr("Current compiles: ");
626
627 char buf[2000];
628 int buflen = sizeof(buf);
629 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
630
631 st->cr();
632 if (_c1_compile_queue != nullptr) {
633 _c1_compile_queue->print(st);
634 }
635 if (_c2_compile_queue != nullptr) {
636 _c2_compile_queue->print(st);
637 }
638 if (_c3_compile_queue != nullptr) {
639 _c3_compile_queue->print(st);
640 }
641 if (_sc1_compile_queue != nullptr) {
642 _sc1_compile_queue->print(st);
643 }
644 if (_sc2_compile_queue != nullptr) {
645 _sc2_compile_queue->print(st);
646 }
647 }
648
649 void CompileQueue::print(outputStream* st) {
650 assert_locked_or_safepoint(_lock);
651 st->print_cr("%s:", name());
652 CompileTask* task = _first;
653 if (task == nullptr) {
654 st->print_cr("Empty");
655 } else {
656 while (task != nullptr) {
657 task->print(st, nullptr, true, true);
658 task = task->next();
659 }
660 }
661 st->cr();
662 }
663
664 void CompileQueue::print_tty() {
665 stringStream ss;
666 // Dump the compile queue into a buffer before locking the tty
667 print(&ss);
668 {
669 ttyLocker ttyl;
670 tty->print("%s", ss.freeze());
671 }
672 }
673
674 CompilerCounters::CompilerCounters() {
675 _current_method[0] = '\0';
676 _compile_type = CompileBroker::no_compile;
677 }
678
679 #if INCLUDE_JFR && COMPILER2_OR_JVMCI
680 // It appends new compiler phase names to growable array phase_names(a new CompilerPhaseType mapping
681 // in compiler/compilerEvent.cpp) and registers it with its serializer.
682 //
683 // c2 uses explicit CompilerPhaseType idToPhase mapping in opto/phasetype.hpp,
684 // so if c2 is used, it should be always registered first.
685 // This function is called during vm initialization.
686 static void register_jfr_phasetype_serializer(CompilerType compiler_type) {
687 ResourceMark rm;
688 static bool first_registration = true;
689 if (compiler_type == compiler_jvmci) {
690 CompilerEvent::PhaseEvent::get_phase_id("NOT_A_PHASE_NAME", false, false, false);
691 first_registration = false;
692 #ifdef COMPILER2
693 } else if (compiler_type == compiler_c2) {
694 assert(first_registration, "invariant"); // c2 must be registered first.
695 for (int i = 0; i < PHASE_NUM_TYPES; i++) {
696 const char* phase_name = CompilerPhaseTypeHelper::to_description((CompilerPhaseType) i);
697 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
698 }
699 first_registration = false;
700 #endif // COMPILER2
701 }
702 }
703 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
704
705 // ------------------------------------------------------------------
706 // CompileBroker::compilation_init
707 //
708 // Initialize the Compilation object
709 void CompileBroker::compilation_init(JavaThread* THREAD) {
710 // No need to initialize compilation system if we do not use it.
711 if (!UseCompiler) {
712 return;
713 }
714 // Set the interface to the current compiler(s).
715 _c1_count = CompilationPolicy::c1_count();
716 _c2_count = CompilationPolicy::c2_count();
717 _c3_count = CompilationPolicy::c3_count();
718 _sc_count = CompilationPolicy::sc_count();
719
720 #if INCLUDE_JVMCI
721 if (EnableJVMCI) {
722 // This is creating a JVMCICompiler singleton.
723 JVMCICompiler* jvmci = new JVMCICompiler();
724
725 if (UseJVMCICompiler) {
726 _compilers[1] = jvmci;
727 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
728 if (BootstrapJVMCI) {
729 // JVMCI will bootstrap so give it more threads
730 _c2_count = MIN2(32, os::active_processor_count());
731 }
732 } else {
733 _c2_count = JVMCIThreads;
734 }
735 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
736 } else {
737 #ifdef COMPILER1
738 _c1_count = JVMCIHostThreads;
739 #endif // COMPILER1
740 }
741 #ifdef COMPILER2
742 if (SCCache::is_on() && (_c3_count > 0)) {
743 _compilers[2] = new C2Compiler();
744 }
745 #endif
746 }
747 }
748 #endif // INCLUDE_JVMCI
749
750 #ifdef COMPILER1
751 if (_c1_count > 0) {
752 _compilers[0] = new Compiler();
753 }
754 #endif // COMPILER1
755
756 #ifdef COMPILER2
757 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
758 if (_c2_count > 0) {
759 _compilers[1] = new C2Compiler();
760 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
761 // idToPhase mapping for c2 is in opto/phasetype.hpp
762 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
763 }
764 }
765 #endif // COMPILER2
766
767 #if INCLUDE_JVMCI
768 // Register after c2 registration.
769 // JVMCI CompilerPhaseType idToPhase mapping is dynamic.
770 if (EnableJVMCI) {
771 JFR_ONLY(register_jfr_phasetype_serializer(compiler_jvmci);)
772 }
773 #endif // INCLUDE_JVMCI
774
775 if (CompilerOracle::should_collect_memstat()) {
776 CompilationMemoryStatistic::initialize();
777 }
778
779 // Start the compiler thread(s)
780 init_compiler_threads();
781 // totalTime performance counter is always created as it is required
782 // by the implementation of java.lang.management.CompilationMXBean.
783 {
784 // Ensure OOM leads to vm_exit_during_initialization.
785 EXCEPTION_MARK;
786 _perf_total_compilation =
787 PerfDataManager::create_counter(JAVA_CI, "totalTime",
788 PerfData::U_Ticks, CHECK);
789 }
790
791 if (UsePerfData) {
792
793 EXCEPTION_MARK;
794
795 // create the jvmstat performance counters
796 _perf_osr_compilation =
797 PerfDataManager::create_counter(SUN_CI, "osrTime",
798 PerfData::U_Ticks, CHECK);
799
800 _perf_standard_compilation =
801 PerfDataManager::create_counter(SUN_CI, "standardTime",
802 PerfData::U_Ticks, CHECK);
803
804 _perf_total_bailout_count =
805 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
806 PerfData::U_Events, CHECK);
807
808 _perf_total_invalidated_count =
809 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
810 PerfData::U_Events, CHECK);
811
812 _perf_total_compile_count =
813 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
814 PerfData::U_Events, CHECK);
815 _perf_total_osr_compile_count =
816 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
817 PerfData::U_Events, CHECK);
818
819 _perf_total_standard_compile_count =
820 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
821 PerfData::U_Events, CHECK);
822
823 _perf_sum_osr_bytes_compiled =
824 PerfDataManager::create_counter(SUN_CI, "osrBytes",
825 PerfData::U_Bytes, CHECK);
826
827 _perf_sum_standard_bytes_compiled =
828 PerfDataManager::create_counter(SUN_CI, "standardBytes",
829 PerfData::U_Bytes, CHECK);
830
831 _perf_sum_nmethod_size =
832 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
833 PerfData::U_Bytes, CHECK);
834
835 _perf_sum_nmethod_code_size =
836 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
837 PerfData::U_Bytes, CHECK);
838
839 _perf_last_method =
840 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
841 CompilerCounters::cmname_buffer_length,
842 "", CHECK);
843
844 _perf_last_failed_method =
845 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
846 CompilerCounters::cmname_buffer_length,
847 "", CHECK);
848
849 _perf_last_invalidated_method =
850 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
851 CompilerCounters::cmname_buffer_length,
852 "", CHECK);
853
854 _perf_last_compile_type =
855 PerfDataManager::create_variable(SUN_CI, "lastType",
856 PerfData::U_None,
857 (jlong)CompileBroker::no_compile,
858 CHECK);
859
860 _perf_last_compile_size =
861 PerfDataManager::create_variable(SUN_CI, "lastSize",
862 PerfData::U_Bytes,
863 (jlong)CompileBroker::no_compile,
864 CHECK);
865
866
867 _perf_last_failed_type =
868 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
869 PerfData::U_None,
870 (jlong)CompileBroker::no_compile,
871 CHECK);
872
873 _perf_last_invalidated_type =
874 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
875 PerfData::U_None,
876 (jlong)CompileBroker::no_compile,
877 CHECK);
878 }
879
880 log_info(scc, init)("CompileBroker is initialized");
881 _initialized = true;
882 }
883
884 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
885 Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
886 return thread_oop;
887 }
888
889 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
890 CompilationPolicy::replay_training_at_init_loop(thread);
891 }
892
893 #if defined(ASSERT) && COMPILER2_OR_JVMCI
894 // Stress testing. Dedicated threads revert optimizations based on escape analysis concurrently to
895 // the running java application. Configured with vm options DeoptimizeObjectsALot*.
896 class DeoptimizeObjectsALotThread : public JavaThread {
897
898 static void deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS);
899 void deoptimize_objects_alot_loop_single();
900 void deoptimize_objects_alot_loop_all();
901
902 public:
903 DeoptimizeObjectsALotThread() : JavaThread(&deopt_objs_alot_thread_entry) { }
904
905 bool is_hidden_from_external_view() const { return true; }
906 };
907
908 // Entry for DeoptimizeObjectsALotThread. The threads are started in
909 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
910 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
911 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
912 bool enter_single_loop;
913 {
914 MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
915 static int single_thread_count = 0;
916 enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
917 }
918 if (enter_single_loop) {
919 dt->deoptimize_objects_alot_loop_single();
920 } else {
921 dt->deoptimize_objects_alot_loop_all();
922 }
923 }
924
925 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
926 // barrier targets a single thread which is selected round robin.
927 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_single() {
928 HandleMark hm(this);
929 while (true) {
930 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *deoptee_thread = jtiwh.next(); ) {
931 { // Begin new scope for escape barrier
932 HandleMarkCleaner hmc(this);
933 ResourceMark rm(this);
934 EscapeBarrier eb(true, this, deoptee_thread);
935 eb.deoptimize_objects(100);
936 }
937 // Now sleep after the escape barriers destructor resumed deoptee_thread.
938 sleep(DeoptimizeObjectsALotInterval);
939 }
940 }
941 }
942
943 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
944 // barrier targets all java threads in the vm at once.
945 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_all() {
946 HandleMark hm(this);
947 while (true) {
948 { // Begin new scope for escape barrier
949 HandleMarkCleaner hmc(this);
950 ResourceMark rm(this);
951 EscapeBarrier eb(true, this);
952 eb.deoptimize_objects_all_threads();
953 }
954 // Now sleep after the escape barriers destructor resumed the java threads.
955 sleep(DeoptimizeObjectsALotInterval);
956 }
957 }
958 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
959
960
961 JavaThread* CompileBroker::make_thread(ThreadType type, jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, JavaThread* THREAD) {
962 Handle thread_oop(THREAD, JNIHandles::resolve_non_null(thread_handle));
963
964 if (java_lang_Thread::thread(thread_oop()) != nullptr) {
965 assert(type == compiler_t, "should only happen with reused compiler threads");
966 // The compiler thread hasn't actually exited yet so don't try to reuse it
967 return nullptr;
968 }
969
970 JavaThread* new_thread = nullptr;
971 switch (type) {
972 case compiler_t:
973 assert(comp != nullptr, "Compiler instance missing.");
974 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
975 CompilerCounters* counters = new CompilerCounters();
976 new_thread = new CompilerThread(queue, counters);
977 }
978 break;
979 #if defined(ASSERT) && COMPILER2_OR_JVMCI
980 case deoptimizer_t:
981 new_thread = new DeoptimizeObjectsALotThread();
982 break;
983 #endif // ASSERT
984 case training_replay_t:
985 new_thread = new TrainingReplayThread();
986 break;
987 default:
988 ShouldNotReachHere();
989 }
990
991 // At this point the new CompilerThread data-races with this startup
992 // thread (which is the main thread and NOT the VM thread).
993 // This means Java bytecodes being executed at startup can
994 // queue compile jobs which will run at whatever default priority the
995 // newly created CompilerThread runs at.
996
997
998 // At this point it may be possible that no osthread was created for the
999 // JavaThread due to lack of resources. We will handle that failure below.
1000 // Also check new_thread so that static analysis is happy.
1001 if (new_thread != nullptr && new_thread->osthread() != nullptr) {
1002
1003 if (type == compiler_t) {
1004 CompilerThread::cast(new_thread)->set_compiler(comp);
1005 }
1006
1007 // Note that we cannot call os::set_priority because it expects Java
1008 // priorities and we are *explicitly* using OS priorities so that it's
1009 // possible to set the compiler thread priority higher than any Java
1010 // thread.
1011
1012 int native_prio = CompilerThreadPriority;
1013 if (native_prio == -1) {
1014 if (UseCriticalCompilerThreadPriority) {
1015 native_prio = os::java_to_os_priority[CriticalPriority];
1016 } else {
1017 native_prio = os::java_to_os_priority[NearMaxPriority];
1018 }
1019 }
1020 os::set_native_priority(new_thread, native_prio);
1021
1022 // Note that this only sets the JavaThread _priority field, which by
1023 // definition is limited to Java priorities and not OS priorities.
1024 JavaThread::start_internal_daemon(THREAD, new_thread, thread_oop, NearMaxPriority);
1025
1026 } else { // osthread initialization failure
1027 if (UseDynamicNumberOfCompilerThreads && type == compiler_t
1028 && comp->num_compiler_threads() > 0) {
1029 // The new thread is not known to Thread-SMR yet so we can just delete.
1030 delete new_thread;
1031 return nullptr;
1032 } else {
1033 vm_exit_during_initialization("java.lang.OutOfMemoryError",
1034 os::native_thread_creation_failed_msg());
1035 }
1036 }
1037
1038 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
1039
1040 return new_thread;
1041 }
1042
1043 static bool trace_compiler_threads() {
1044 LogTarget(Debug, jit, thread) lt;
1045 return TraceCompilerThreads || lt.is_enabled();
1046 }
1047
1048 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1049 char name_buffer[256];
1050 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1051 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1052 return JNIHandles::make_global(thread_oop);
1053 }
1054
1055 static void print_compiler_threads(stringStream& msg) {
1056 if (TraceCompilerThreads) {
1057 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1058 }
1059 LogTarget(Debug, jit, thread) lt;
1060 if (lt.is_enabled()) {
1061 LogStream ls(lt);
1062 ls.print_cr("%s", msg.as_string());
1063 }
1064 }
1065
1066 static void print_compiler_thread(JavaThread *ct) {
1067 if (trace_compiler_threads()) {
1068 ResourceMark rm;
1069 ThreadsListHandle tlh; // name() depends on the TLH.
1070 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1071 stringStream msg;
1072 msg.print("Added initial compiler thread %s", ct->name());
1073 print_compiler_threads(msg);
1074 }
1075 }
1076
1077 void CompileBroker::init_compiler_threads() {
1078 // Ensure any exceptions lead to vm_exit_during_initialization.
1079 EXCEPTION_MARK;
1080 #if !defined(ZERO)
1081 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1082 #endif // !ZERO
1083 // Initialize the compilation queue
1084 if (_c2_count > 0) {
1085 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1086 _c2_compile_queue = new CompileQueue(name, MethodCompileQueueC2_lock);
1087 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1088 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1089 }
1090 if (_c1_count > 0) {
1091 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1092 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1093 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1094 }
1095
1096 if (_c3_count > 0) {
1097 const char* name = "C2 compile queue";
1098 _c3_compile_queue = new CompileQueue(name, MethodCompileQueueC3_lock);
1099 _compiler3_objects = NEW_C_HEAP_ARRAY(jobject, _c3_count, mtCompiler);
1100 _compiler3_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c3_count, mtCompiler);
1101 }
1102 if (_sc_count > 0) {
1103 if (_c1_count > 0) { // C1 is present
1104 _sc1_compile_queue = new CompileQueue("C1 SC compile queue", MethodCompileQueueSC1_lock);
1105 }
1106 if (_c2_count > 0) { // C2 is present
1107 _sc2_compile_queue = new CompileQueue("C2 SC compile queue", MethodCompileQueueSC2_lock);
1108 }
1109 _sc_objects = NEW_C_HEAP_ARRAY(jobject, _sc_count, mtCompiler);
1110 _sc_logs = NEW_C_HEAP_ARRAY(CompileLog*, _sc_count, mtCompiler);
1111 }
1112 char name_buffer[256];
1113
1114 for (int i = 0; i < _c2_count; i++) {
1115 // Create a name for our thread.
1116 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1117 _compiler2_objects[i] = thread_handle;
1118 _compiler2_logs[i] = nullptr;
1119
1120 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1121 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1122 assert(ct != nullptr, "should have been handled for initial thread");
1123 _compilers[1]->set_num_compiler_threads(i + 1);
1124 print_compiler_thread(ct);
1125 }
1126 }
1127
1128 for (int i = 0; i < _c1_count; i++) {
1129 // Create a name for our thread.
1130 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1131 _compiler1_objects[i] = thread_handle;
1132 _compiler1_logs[i] = nullptr;
1133
1134 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1135 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1136 assert(ct != nullptr, "should have been handled for initial thread");
1137 _compilers[0]->set_num_compiler_threads(i + 1);
1138 print_compiler_thread(ct);
1139 }
1140 }
1141
1142 for (int i = 0; i < _c3_count; i++) {
1143 // Create a name for our thread.
1144 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C2 CompilerThread%d", i);
1145 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1146 jobject thread_handle = JNIHandles::make_global(thread_oop);
1147 _compiler3_objects[i] = thread_handle;
1148 _compiler3_logs[i] = nullptr;
1149
1150 JavaThread *ct = make_thread(compiler_t, thread_handle, _c3_compile_queue, _compilers[2], THREAD);
1151 assert(ct != nullptr, "should have been handled for initial thread");
1152 _compilers[2]->set_num_compiler_threads(i + 1);
1153 print_compiler_thread(ct);
1154 }
1155
1156 if (_sc_count > 0) {
1157 int i = 0;
1158 if (_c1_count > 0) { // C1 is present
1159 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 1);
1160 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1161 jobject thread_handle = JNIHandles::make_global(thread_oop);
1162 _sc_objects[i] = thread_handle;
1163 _sc_logs[i] = nullptr;
1164 i++;
1165
1166 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc1_compile_queue, _compilers[0], THREAD);
1167 assert(ct != nullptr, "should have been handled for initial thread");
1168 print_compiler_thread(ct);
1169 }
1170 if (_c2_count > 0) { // C2 is present
1171 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 2);
1172 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1173 jobject thread_handle = JNIHandles::make_global(thread_oop);
1174 _sc_objects[i] = thread_handle;
1175 _sc_logs[i] = nullptr;
1176
1177 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc2_compile_queue, _compilers[1], THREAD);
1178 assert(ct != nullptr, "should have been handled for initial thread");
1179 print_compiler_thread(ct);
1180 }
1181 }
1182
1183 if (UsePerfData) {
1184 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count + _c3_count, CHECK);
1185 }
1186
1187 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1188 if (DeoptimizeObjectsALot) {
1189 // Initialize and start the object deoptimizer threads
1190 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1191 for (int count = 0; count < total_count; count++) {
1192 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1193 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1194 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1195 }
1196 }
1197 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1198 }
1199
1200 void CompileBroker::init_training_replay() {
1201 // Ensure any exceptions lead to vm_exit_during_initialization.
1202 EXCEPTION_MARK;
1203 if (TrainingData::have_data()) {
1204 if (UseConcurrentTrainingReplay) {
1205 Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1206 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1207 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1208 }
1209 _replay_initialized = true;
1210 }
1211 }
1212
1213 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1214
1215 int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1216 const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1217
1218 // Quick check if we already have enough compiler threads without taking the lock.
1219 // Numbers may change concurrently, so we read them again after we have the lock.
1220 if (_c2_compile_queue != nullptr) {
1221 old_c2_count = get_c2_thread_count();
1222 new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1223 }
1224 if (_c1_compile_queue != nullptr) {
1225 old_c1_count = get_c1_thread_count();
1226 new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1227 }
1228 if (new_c2_count <= old_c2_count && new_c1_count <= old_c1_count) return;
1229
1230 // Now, we do the more expensive operations.
1231 julong free_memory = os::free_memory();
1232 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
1233 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
1234 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
1235
1236 // Only attempt to start additional threads if the lock is free.
1237 if (!CompileThread_lock->try_lock()) return;
1238
1239 if (_c2_compile_queue != nullptr) {
1240 old_c2_count = get_c2_thread_count();
1241 new_c2_count = MIN4(_c2_count,
1242 _c2_compile_queue->size() / c2_tasks_per_thread,
1243 (int)(free_memory / (200*M)),
1244 (int)(available_cc_np / (128*K)));
1245
1246 for (int i = old_c2_count; i < new_c2_count; i++) {
1247 #if INCLUDE_JVMCI
1248 if (UseJVMCICompiler && !UseJVMCINativeLibrary && _compiler2_objects[i] == nullptr) {
1249 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread objects as their
1250 // existence is completely hidden from the rest of the VM (and those compiler threads can't
1251 // call Java code to do the creation anyway).
1252 //
1253 // For pure Java JVMCI we have to create new j.l.Thread objects as they are visible and we
1254 // can see unexpected thread lifecycle transitions if we bind them to new JavaThreads. For
1255 // native library JVMCI it's preferred to use the C1/C2 strategy as this avoids unnecessary
1256 // coupling with Java.
1257 if (!THREAD->can_call_java()) break;
1258 char name_buffer[256];
1259 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", _compilers[1]->name(), i);
1260 Handle thread_oop;
1261 {
1262 // We have to give up the lock temporarily for the Java calls.
1263 MutexUnlocker mu(CompileThread_lock);
1264 thread_oop = JavaThread::create_system_thread_object(name_buffer, THREAD);
1265 }
1266 if (HAS_PENDING_EXCEPTION) {
1267 if (trace_compiler_threads()) {
1268 ResourceMark rm;
1269 stringStream msg;
1270 msg.print_cr("JVMCI compiler thread creation failed:");
1271 PENDING_EXCEPTION->print_on(&msg);
1272 print_compiler_threads(msg);
1273 }
1274 CLEAR_PENDING_EXCEPTION;
1275 break;
1276 }
1277 // Check if another thread has beaten us during the Java calls.
1278 if (get_c2_thread_count() != i) break;
1279 jobject thread_handle = JNIHandles::make_global(thread_oop);
1280 assert(compiler2_object(i) == nullptr, "Old one must be released!");
1281 _compiler2_objects[i] = thread_handle;
1282 }
1283 #endif
1284 guarantee(compiler2_object(i) != nullptr, "Thread oop must exist");
1285 JavaThread *ct = make_thread(compiler_t, compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD);
1286 if (ct == nullptr) break;
1287 _compilers[1]->set_num_compiler_threads(i + 1);
1288 if (trace_compiler_threads()) {
1289 ResourceMark rm;
1290 ThreadsListHandle tlh; // name() depends on the TLH.
1291 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1292 stringStream msg;
1293 msg.print("Added compiler thread %s (free memory: %dMB, available non-profiled code cache: %dMB)",
1294 ct->name(), (int)(free_memory/M), (int)(available_cc_np/M));
1295 print_compiler_threads(msg);
1296 }
1297 }
1298 }
1299
1300 if (_c1_compile_queue != nullptr) {
1301 old_c1_count = get_c1_thread_count();
1302 new_c1_count = MIN4(_c1_count,
1303 _c1_compile_queue->size() / c1_tasks_per_thread,
1304 (int)(free_memory / (100*M)),
1305 (int)(available_cc_p / (128*K)));
1306
1307 for (int i = old_c1_count; i < new_c1_count; i++) {
1308 JavaThread *ct = make_thread(compiler_t, compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD);
1309 if (ct == nullptr) break;
1310 _compilers[0]->set_num_compiler_threads(i + 1);
1311 if (trace_compiler_threads()) {
1312 ResourceMark rm;
1313 ThreadsListHandle tlh; // name() depends on the TLH.
1314 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1315 stringStream msg;
1316 msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1317 ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1318 print_compiler_threads(msg);
1319 }
1320 }
1321 }
1322
1323 CompileThread_lock->unlock();
1324 }
1325
1326
1327 /**
1328 * Set the methods on the stack as on_stack so that redefine classes doesn't
1329 * reclaim them. This method is executed at a safepoint.
1330 */
1331 void CompileBroker::mark_on_stack() {
1332 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1333 // Since we are at a safepoint, we do not need a lock to access
1334 // the compile queues.
1335 if (_c3_compile_queue != nullptr) {
1336 _c3_compile_queue->mark_on_stack();
1337 }
1338 if (_c2_compile_queue != nullptr) {
1339 _c2_compile_queue->mark_on_stack();
1340 }
1341 if (_c1_compile_queue != nullptr) {
1342 _c1_compile_queue->mark_on_stack();
1343 }
1344 if (_sc1_compile_queue != nullptr) {
1345 _sc1_compile_queue->mark_on_stack();
1346 }
1347 if (_sc2_compile_queue != nullptr) {
1348 _sc2_compile_queue->mark_on_stack();
1349 }
1350 }
1351
1352 // ------------------------------------------------------------------
1353 // CompileBroker::compile_method
1354 //
1355 // Request compilation of a method.
1356 void CompileBroker::compile_method_base(const methodHandle& method,
1357 int osr_bci,
1358 int comp_level,
1359 const methodHandle& hot_method,
1360 int hot_count,
1361 CompileTask::CompileReason compile_reason,
1362 bool requires_online_compilation,
1363 bool blocking,
1364 Thread* thread) {
1365 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1366 assert(method->method_holder()->is_instance_klass(),
1367 "sanity check");
1368 assert(!method->method_holder()->is_not_initialized() ||
1369 compile_reason == CompileTask::Reason_Preload ||
1370 compile_reason == CompileTask::Reason_Precompile ||
1371 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1372 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1373
1374 if (CIPrintRequests) {
1375 tty->print("request: ");
1376 method->print_short_name(tty);
1377 if (osr_bci != InvocationEntryBci) {
1378 tty->print(" osr_bci: %d", osr_bci);
1379 }
1380 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1381 if (!hot_method.is_null()) {
1382 tty->print(" hot: ");
1383 if (hot_method() != method()) {
1384 hot_method->print_short_name(tty);
1385 } else {
1386 tty->print("yes");
1387 }
1388 }
1389 tty->cr();
1390 }
1391
1392 // A request has been made for compilation. Before we do any
1393 // real work, check to see if the method has been compiled
1394 // in the meantime with a definitive result.
1395 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1396 return;
1397 }
1398
1399 #ifndef PRODUCT
1400 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1401 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1402 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1403 return;
1404 }
1405 }
1406 #endif
1407
1408 // If this method is already in the compile queue, then
1409 // we do not block the current thread.
1410 if (compilation_is_in_queue(method)) {
1411 // We may want to decay our counter a bit here to prevent
1412 // multiple denied requests for compilation. This is an
1413 // open compilation policy issue. Note: The other possibility,
1414 // in the case that this is a blocking compile request, is to have
1415 // all subsequent blocking requesters wait for completion of
1416 // ongoing compiles. Note that in this case we'll need a protocol
1417 // for freeing the associated compile tasks. [Or we could have
1418 // a single static monitor on which all these waiters sleep.]
1419 return;
1420 }
1421
1422 // Tiered policy requires MethodCounters to exist before adding a method to
1423 // the queue. Create if we don't have them yet.
1424 if (compile_reason != CompileTask::Reason_Preload) {
1425 method->get_method_counters(thread);
1426 }
1427
1428 SCCEntry* scc_entry = find_scc_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1429 bool is_scc = (scc_entry != nullptr);
1430
1431 // Outputs from the following MutexLocker block:
1432 CompileTask* task = nullptr;
1433 CompileQueue* queue;
1434 #if INCLUDE_JVMCI
1435 if (is_c2_compile(comp_level) && compiler2()->is_jvmci() && compiler3() != nullptr &&
1436 ((JVMCICompiler*)compiler2())->force_comp_at_level_simple(method)) {
1437 assert(_c3_compile_queue != nullptr, "sanity");
1438 queue = _c3_compile_queue; // JVMCI compiler's methods compilation
1439 } else
1440 #endif
1441 queue = compile_queue(comp_level, is_scc);
1442
1443 // Acquire our lock.
1444 {
1445 ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1446
1447 // Make sure the method has not slipped into the queues since
1448 // last we checked; note that those checks were "fast bail-outs".
1449 // Here we need to be more careful, see 14012000 below.
1450 if (compilation_is_in_queue(method)) {
1451 return;
1452 }
1453
1454 // We need to check again to see if the compilation has
1455 // completed. A previous compilation may have registered
1456 // some result.
1457 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1458 return;
1459 }
1460
1461 // We now know that this compilation is not pending, complete,
1462 // or prohibited. Assign a compile_id to this compilation
1463 // and check to see if it is in our [Start..Stop) range.
1464 int compile_id = assign_compile_id(method, osr_bci);
1465 if (compile_id == 0) {
1466 // The compilation falls outside the allowed range.
1467 return;
1468 }
1469
1470 #if INCLUDE_JVMCI
1471 if (UseJVMCICompiler && blocking) {
1472 // Don't allow blocking compiles for requests triggered by JVMCI.
1473 if (thread->is_Compiler_thread()) {
1474 blocking = false;
1475 }
1476
1477 // In libjvmci, JVMCI initialization should not deadlock with other threads
1478 if (!UseJVMCINativeLibrary) {
1479 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1480 vframeStream vfst(JavaThread::cast(thread));
1481 for (; !vfst.at_end(); vfst.next()) {
1482 if (vfst.method()->is_static_initializer() ||
1483 (vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass()) &&
1484 vfst.method()->name() == vmSymbols::loadClass_name())) {
1485 blocking = false;
1486 break;
1487 }
1488 }
1489
1490 // Don't allow blocking compilation requests to JVMCI
1491 // if JVMCI itself is not yet initialized
1492 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1493 blocking = false;
1494 }
1495 }
1496
1497 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1498 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1499 // such as the DestroyJavaVM thread.
1500 if (JVMCI::in_shutdown()) {
1501 blocking = false;
1502 }
1503 }
1504 #endif // INCLUDE_JVMCI
1505
1506 // We will enter the compilation in the queue.
1507 // 14012000: Note that this sets the queued_for_compile bits in
1508 // the target method. We can now reason that a method cannot be
1509 // queued for compilation more than once, as follows:
1510 // Before a thread queues a task for compilation, it first acquires
1511 // the compile queue lock, then checks if the method's queued bits
1512 // are set or it has already been compiled. Thus there can not be two
1513 // instances of a compilation task for the same method on the
1514 // compilation queue. Consider now the case where the compilation
1515 // thread has already removed a task for that method from the queue
1516 // and is in the midst of compiling it. In this case, the
1517 // queued_for_compile bits must be set in the method (and these
1518 // will be visible to the current thread, since the bits were set
1519 // under protection of the compile queue lock, which we hold now.
1520 // When the compilation completes, the compiler thread first sets
1521 // the compilation result and then clears the queued_for_compile
1522 // bits. Neither of these actions are protected by a barrier (or done
1523 // under the protection of a lock), so the only guarantee we have
1524 // (on machines with TSO (Total Store Order)) is that these values
1525 // will update in that order. As a result, the only combinations of
1526 // these bits that the current thread will see are, in temporal order:
1527 // <RESULT, QUEUE> :
1528 // <0, 1> : in compile queue, but not yet compiled
1529 // <1, 1> : compiled but queue bit not cleared
1530 // <1, 0> : compiled and queue bit cleared
1531 // Because we first check the queue bits then check the result bits,
1532 // we are assured that we cannot introduce a duplicate task.
1533 // Note that if we did the tests in the reverse order (i.e. check
1534 // result then check queued bit), we could get the result bit before
1535 // the compilation completed, and the queue bit after the compilation
1536 // completed, and end up introducing a "duplicate" (redundant) task.
1537 // In that case, the compiler thread should first check if a method
1538 // has already been compiled before trying to compile it.
1539 // NOTE: in the event that there are multiple compiler threads and
1540 // there is de-optimization/recompilation, things will get hairy,
1541 // and in that case it's best to protect both the testing (here) of
1542 // these bits, and their updating (here and elsewhere) under a
1543 // common lock.
1544 task = create_compile_task(queue,
1545 compile_id, method,
1546 osr_bci, comp_level,
1547 hot_method, hot_count, scc_entry, compile_reason,
1548 requires_online_compilation, blocking);
1549
1550 if (task->is_scc() && (_sc_count > 0)) {
1551 // Put it on SC queue
1552 queue = is_c1_compile(comp_level) ? _sc1_compile_queue : _sc2_compile_queue;
1553 }
1554
1555 if (UseLockFreeCompileQueues) {
1556 assert(queue->lock()->owned_by_self() == false, "");
1557 queue->add_pending(task);
1558 } else {
1559 queue->add(task);
1560 }
1561 }
1562
1563 if (blocking) {
1564 wait_for_completion(task);
1565 }
1566 }
1567
1568 SCCEntry* CompileBroker::find_scc_entry(const methodHandle& method, int osr_bci, int comp_level,
1569 CompileTask::CompileReason compile_reason,
1570 bool requires_online_compilation) {
1571 SCCEntry* scc_entry = nullptr;
1572 if (osr_bci == InvocationEntryBci && !requires_online_compilation && SCCache::is_on_for_read()) {
1573 // Check for cached code.
1574 if (compile_reason == CompileTask::Reason_Preload) {
1575 scc_entry = method->scc_entry();
1576 assert(scc_entry != nullptr && scc_entry->for_preload(), "sanity");
1577 } else {
1578 scc_entry = SCCache::find_code_entry(method, comp_level);
1579 }
1580 }
1581 return scc_entry;
1582 }
1583
1584 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1585 int comp_level,
1586 const methodHandle& hot_method, int hot_count,
1587 bool requires_online_compilation,
1588 CompileTask::CompileReason compile_reason,
1589 TRAPS) {
1590 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1591 if (!_initialized || comp_level == CompLevel_none) {
1592 return nullptr;
1593 }
1594
1595 #if INCLUDE_JVMCI
1596 if (EnableJVMCI && UseJVMCICompiler &&
1597 comp_level == CompLevel_full_optimization && !AOTLinkedClassBulkLoader::class_preloading_finished()) {
1598 return nullptr;
1599 }
1600 #endif
1601
1602 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1603 assert(comp != nullptr, "Ensure we have a compiler");
1604
1605 #if INCLUDE_JVMCI
1606 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1607 // JVMCI compilation is not yet initializable.
1608 return nullptr;
1609 }
1610 #endif
1611
1612 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1613 // CompileBroker::compile_method can trap and can have pending async exception.
1614 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1615 DirectivesStack::release(directive);
1616 return nm;
1617 }
1618
1619 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1620 int comp_level,
1621 const methodHandle& hot_method, int hot_count,
1622 bool requires_online_compilation,
1623 CompileTask::CompileReason compile_reason,
1624 DirectiveSet* directive,
1625 TRAPS) {
1626
1627 // make sure arguments make sense
1628 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1629 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1630 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1631 assert(!method->method_holder()->is_not_initialized() ||
1632 compile_reason == CompileTask::Reason_Preload ||
1633 compile_reason == CompileTask::Reason_Precompile ||
1634 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1635 // return quickly if possible
1636
1637 if (PrecompileOnlyAndExit && !CompileTask::reason_is_precompiled(compile_reason)) {
1638 return nullptr;
1639 }
1640
1641 // lock, make sure that the compilation
1642 // isn't prohibited in a straightforward way.
1643 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1644 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1645 return nullptr;
1646 }
1647
1648 if (osr_bci == InvocationEntryBci) {
1649 // standard compilation
1650 nmethod* method_code = method->code();
1651 if (method_code != nullptr) {
1652 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1653 return method_code;
1654 }
1655 }
1656 if (method->is_not_compilable(comp_level)) {
1657 return nullptr;
1658 }
1659 } else {
1660 // osr compilation
1661 // We accept a higher level osr method
1662 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1663 if (nm != nullptr) return nm;
1664 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1665 }
1666
1667 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1668 // some prerequisites that are compiler specific
1669 if (compile_reason != CompileTask::Reason_Preload && (comp->is_c2() || comp->is_jvmci())) {
1670 InternalOOMEMark iom(THREAD);
1671 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1672 // Resolve all classes seen in the signature of the method
1673 // we are compiling.
1674 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1675 }
1676
1677 // If the method is native, do the lookup in the thread requesting
1678 // the compilation. Native lookups can load code, which is not
1679 // permitted during compilation.
1680 //
1681 // Note: A native method implies non-osr compilation which is
1682 // checked with an assertion at the entry of this method.
1683 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1684 address adr = NativeLookup::lookup(method, THREAD);
1685 if (HAS_PENDING_EXCEPTION) {
1686 // In case of an exception looking up the method, we just forget
1687 // about it. The interpreter will kick-in and throw the exception.
1688 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1689 CLEAR_PENDING_EXCEPTION;
1690 return nullptr;
1691 }
1692 assert(method->has_native_function(), "must have native code by now");
1693 }
1694
1695 // RedefineClasses() has replaced this method; just return
1696 if (method->is_old()) {
1697 return nullptr;
1698 }
1699
1700 // JVMTI -- post_compile_event requires jmethod_id() that may require
1701 // a lock the compiling thread can not acquire. Prefetch it here.
1702 if (JvmtiExport::should_post_compiled_method_load()) {
1703 method->jmethod_id();
1704 }
1705
1706 // do the compilation
1707 if (method->is_native()) {
1708 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1709 #if defined(X86) && !defined(ZERO)
1710 // The following native methods:
1711 //
1712 // java.lang.Float.intBitsToFloat
1713 // java.lang.Float.floatToRawIntBits
1714 // java.lang.Double.longBitsToDouble
1715 // java.lang.Double.doubleToRawLongBits
1716 //
1717 // are called through the interpreter even if interpreter native stubs
1718 // are not preferred (i.e., calling through adapter handlers is preferred).
1719 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1720 // if the version of the methods from the native libraries is called.
1721 // As the interpreter and the C2-intrinsified version of the methods preserves
1722 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1723 if ((UseSSE >= 1 &&
1724 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1725 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1726 (UseSSE >= 2 &&
1727 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1728 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1729 return nullptr;
1730 }
1731 #endif // X86 && !ZERO
1732
1733 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1734 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1735 //
1736 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1737 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1738 AdapterHandlerLibrary::create_native_wrapper(method);
1739 } else {
1740 return nullptr;
1741 }
1742 } else {
1743 // If the compiler is shut off due to code cache getting full
1744 // fail out now so blocking compiles dont hang the java thread
1745 if (!should_compile_new_jobs()) {
1746 return nullptr;
1747 }
1748 bool is_blocking = ReplayCompiles ||
1749 !directive->BackgroundCompilationOption ||
1750 (compile_reason == CompileTask::Reason_Precompile) ||
1751 (compile_reason == CompileTask::Reason_PrecompileForPreload);
1752 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1753 }
1754
1755 // return requested nmethod
1756 // We accept a higher level osr method
1757 if (osr_bci == InvocationEntryBci) {
1758 return method->code();
1759 }
1760 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1761 }
1762
1763
1764 // ------------------------------------------------------------------
1765 // CompileBroker::compilation_is_complete
1766 //
1767 // See if compilation of this method is already complete.
1768 bool CompileBroker::compilation_is_complete(Method* method,
1769 int osr_bci,
1770 int comp_level,
1771 bool online_only,
1772 CompileTask::CompileReason compile_reason) {
1773 if (compile_reason == CompileTask::Reason_Precompile ||
1774 compile_reason == CompileTask::Reason_PrecompileForPreload) {
1775 return false; // FIXME: any restrictions?
1776 }
1777 bool is_osr = (osr_bci != standard_entry_bci);
1778 if (is_osr) {
1779 if (method->is_not_osr_compilable(comp_level)) {
1780 return true;
1781 } else {
1782 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1783 return (result != nullptr);
1784 }
1785 } else {
1786 if (method->is_not_compilable(comp_level)) {
1787 return true;
1788 } else {
1789 nmethod* result = method->code();
1790 if (result == nullptr) {
1791 return false;
1792 }
1793 if (online_only && result->is_scc()) {
1794 return false;
1795 }
1796 bool same_level = (comp_level == result->comp_level());
1797 if (result->has_clinit_barriers()) {
1798 return !same_level; // Allow replace preloaded code with new code of the same level
1799 }
1800 return same_level;
1801 }
1802 }
1803 }
1804
1805
1806 /**
1807 * See if this compilation is already requested.
1808 *
1809 * Implementation note: there is only a single "is in queue" bit
1810 * for each method. This means that the check below is overly
1811 * conservative in the sense that an osr compilation in the queue
1812 * will block a normal compilation from entering the queue (and vice
1813 * versa). This can be remedied by a full queue search to disambiguate
1814 * cases. If it is deemed profitable, this may be done.
1815 */
1816 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1817 return method->queued_for_compilation();
1818 }
1819
1820 // ------------------------------------------------------------------
1821 // CompileBroker::compilation_is_prohibited
1822 //
1823 // See if this compilation is not allowed.
1824 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1825 bool is_native = method->is_native();
1826 // Some compilers may not support the compilation of natives.
1827 AbstractCompiler *comp = compiler(comp_level);
1828 if (is_native && (!CICompileNatives || comp == nullptr)) {
1829 method->set_not_compilable_quietly("native methods not supported", comp_level);
1830 return true;
1831 }
1832
1833 bool is_osr = (osr_bci != standard_entry_bci);
1834 // Some compilers may not support on stack replacement.
1835 if (is_osr && (!CICompileOSR || comp == nullptr)) {
1836 method->set_not_osr_compilable("OSR not supported", comp_level);
1837 return true;
1838 }
1839
1840 // The method may be explicitly excluded by the user.
1841 double scale;
1842 if (excluded || (CompilerOracle::has_option_value(method, CompileCommandEnum::CompileThresholdScaling, scale) && scale == 0)) {
1843 bool quietly = CompilerOracle::be_quiet();
1844 if (PrintCompilation && !quietly) {
1845 // This does not happen quietly...
1846 ResourceMark rm;
1847 tty->print("### Excluding %s:%s",
1848 method->is_native() ? "generation of native wrapper" : "compile",
1849 (method->is_static() ? " static" : ""));
1850 method->print_short_name(tty);
1851 tty->cr();
1852 }
1853 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1854 }
1855
1856 return false;
1857 }
1858
1859 /**
1860 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1861 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1862 * The function also allows to generate separate compilation IDs for OSR compilations.
1863 */
1864 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1865 #ifdef ASSERT
1866 bool is_osr = (osr_bci != standard_entry_bci);
1867 int id;
1868 if (method->is_native()) {
1869 assert(!is_osr, "can't be osr");
1870 // Adapters, native wrappers and method handle intrinsics
1871 // should be generated always.
1872 return Atomic::add(CICountNative ? &_native_compilation_id : &_compilation_id, 1);
1873 } else if (CICountOSR && is_osr) {
1874 id = Atomic::add(&_osr_compilation_id, 1);
1875 if (CIStartOSR <= id && id < CIStopOSR) {
1876 return id;
1877 }
1878 } else {
1879 id = Atomic::add(&_compilation_id, 1);
1880 if (CIStart <= id && id < CIStop) {
1881 return id;
1882 }
1883 }
1884
1885 // Method was not in the appropriate compilation range.
1886 method->set_not_compilable_quietly("Not in requested compile id range");
1887 return 0;
1888 #else
1889 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1890 // only _compilation_id is incremented.
1891 return Atomic::add(&_compilation_id, 1);
1892 #endif
1893 }
1894
1895 // ------------------------------------------------------------------
1896 // CompileBroker::assign_compile_id_unlocked
1897 //
1898 // Public wrapper for assign_compile_id that acquires the needed locks
1899 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1900 return assign_compile_id(method, osr_bci);
1901 }
1902
1903 // ------------------------------------------------------------------
1904 // CompileBroker::create_compile_task
1905 //
1906 // Create a CompileTask object representing the current request for
1907 // compilation. Add this task to the queue.
1908 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1909 int compile_id,
1910 const methodHandle& method,
1911 int osr_bci,
1912 int comp_level,
1913 const methodHandle& hot_method,
1914 int hot_count,
1915 SCCEntry* scc_entry,
1916 CompileTask::CompileReason compile_reason,
1917 bool requires_online_compilation,
1918 bool blocking) {
1919 CompileTask* new_task = CompileTask::allocate();
1920 new_task->initialize(compile_id, method, osr_bci, comp_level,
1921 hot_method, hot_count, scc_entry, compile_reason, queue,
1922 requires_online_compilation, blocking);
1923 return new_task;
1924 }
1925
1926 #if INCLUDE_JVMCI
1927 // The number of milliseconds to wait before checking if
1928 // JVMCI compilation has made progress.
1929 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1930
1931 // The number of JVMCI compilation progress checks that must fail
1932 // before unblocking a thread waiting for a blocking compilation.
1933 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1934
1935 /**
1936 * Waits for a JVMCI compiler to complete a given task. This thread
1937 * waits until either the task completes or it sees no JVMCI compilation
1938 * progress for N consecutive milliseconds where N is
1939 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1940 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1941 *
1942 * @return true if this thread needs to free/recycle the task
1943 */
1944 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1945 assert(UseJVMCICompiler, "sanity");
1946 MonitorLocker ml(thread, task->lock());
1947 int progress_wait_attempts = 0;
1948 jint thread_jvmci_compilation_ticks = 0;
1949 jint global_jvmci_compilation_ticks = jvmci->global_compilation_ticks();
1950 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1951 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1952 JVMCICompileState* jvmci_compile_state = task->blocking_jvmci_compile_state();
1953
1954 bool progress;
1955 if (jvmci_compile_state != nullptr) {
1956 jint ticks = jvmci_compile_state->compilation_ticks();
1957 progress = (ticks - thread_jvmci_compilation_ticks) != 0;
1958 JVMCI_event_1("waiting on compilation %d [ticks=%d]", task->compile_id(), ticks);
1959 thread_jvmci_compilation_ticks = ticks;
1960 } else {
1961 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1962 // that all JVMCI compiler threads are blocked on. We use the global JVMCI
1963 // compilation ticks to determine whether JVMCI compilation
1964 // is still making progress through the JVMCI compiler queue.
1965 jint ticks = jvmci->global_compilation_ticks();
1966 progress = (ticks - global_jvmci_compilation_ticks) != 0;
1967 JVMCI_event_1("waiting on compilation %d to be queued [ticks=%d]", task->compile_id(), ticks);
1968 global_jvmci_compilation_ticks = ticks;
1969 }
1970
1971 if (!progress) {
1972 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1973 if (PrintCompilation) {
1974 task->print(tty, "wait for blocking compilation timed out");
1975 }
1976 JVMCI_event_1("waiting on compilation %d timed out", task->compile_id());
1977 break;
1978 }
1979 } else {
1980 progress_wait_attempts = 0;
1981 }
1982 }
1983 task->clear_waiter();
1984 return task->is_complete();
1985 }
1986 #endif
1987
1988 /**
1989 * Wait for the compilation task to complete.
1990 */
1991 void CompileBroker::wait_for_completion(CompileTask* task) {
1992 if (CIPrintCompileQueue) {
1993 ttyLocker ttyl;
1994 tty->print_cr("BLOCKING FOR COMPILE");
1995 }
1996
1997 assert(task->is_blocking(), "can only wait on blocking task");
1998
1999 JavaThread* thread = JavaThread::current();
2000
2001 methodHandle method(thread, task->method());
2002 bool free_task;
2003 #if INCLUDE_JVMCI
2004 AbstractCompiler* comp = compiler(task->comp_level());
2005 if (!UseJVMCINativeLibrary && comp->is_jvmci() && !task->should_wait_for_compilation()) {
2006 // It may return before compilation is completed.
2007 // Note that libjvmci should not pre-emptively unblock
2008 // a thread waiting for a compilation as it does not call
2009 // Java code and so is not deadlock prone like jarjvmci.
2010 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
2011 } else
2012 #endif
2013 {
2014 MonitorLocker ml(thread, task->lock());
2015 free_task = true;
2016 while (!task->is_complete() && !is_compilation_disabled_forever()) {
2017 ml.wait();
2018 }
2019 }
2020
2021 if (free_task) {
2022 if (is_compilation_disabled_forever()) {
2023 CompileTask::free(task);
2024 return;
2025 }
2026
2027 // It is harmless to check this status without the lock, because
2028 // completion is a stable property (until the task object is recycled).
2029 assert(task->is_complete(), "Compilation should have completed");
2030
2031 // By convention, the waiter is responsible for recycling a
2032 // blocking CompileTask. Since there is only one waiter ever
2033 // waiting on a CompileTask, we know that no one else will
2034 // be using this CompileTask; we can free it.
2035 CompileTask::free(task);
2036 }
2037 }
2038
2039 /**
2040 * Initialize compiler thread(s) + compiler object(s). The postcondition
2041 * of this function is that the compiler runtimes are initialized and that
2042 * compiler threads can start compiling.
2043 */
2044 bool CompileBroker::init_compiler_runtime() {
2045 CompilerThread* thread = CompilerThread::current();
2046 AbstractCompiler* comp = thread->compiler();
2047 // Final sanity check - the compiler object must exist
2048 guarantee(comp != nullptr, "Compiler object must exist");
2049
2050 {
2051 // Must switch to native to allocate ci_env
2052 ThreadToNativeFromVM ttn(thread);
2053 ciEnv ci_env((CompileTask*)nullptr);
2054 // Cache Jvmti state
2055 ci_env.cache_jvmti_state();
2056 // Cache DTrace flags
2057 ci_env.cache_dtrace_flags();
2058
2059 // Switch back to VM state to do compiler initialization
2060 ThreadInVMfromNative tv(thread);
2061
2062 // Perform per-thread and global initializations
2063 {
2064 MutexLocker only_one (thread, CompileThread_lock);
2065 SCCache::init_table();
2066 }
2067 comp->initialize();
2068 }
2069
2070 if (comp->is_failed()) {
2071 disable_compilation_forever();
2072 // If compiler initialization failed, no compiler thread that is specific to a
2073 // particular compiler runtime will ever start to compile methods.
2074 shutdown_compiler_runtime(comp, thread);
2075 return false;
2076 }
2077
2078 // C1 specific check
2079 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2080 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2081 return false;
2082 }
2083
2084 return true;
2085 }
2086
2087 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2088 BufferBlob* blob = thread->get_buffer_blob();
2089 if (blob != nullptr) {
2090 blob->purge();
2091 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2092 CodeCache::free(blob);
2093 }
2094 }
2095
2096 /**
2097 * If C1 and/or C2 initialization failed, we shut down all compilation.
2098 * We do this to keep things simple. This can be changed if it ever turns
2099 * out to be a problem.
2100 */
2101 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2102 free_buffer_blob_if_allocated(thread);
2103
2104 log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2105
2106 if (comp->should_perform_shutdown()) {
2107 // There are two reasons for shutting down the compiler
2108 // 1) compiler runtime initialization failed
2109 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2110 warning("%s initialization failed. Shutting down all compilers", comp->name());
2111
2112 // Only one thread per compiler runtime object enters here
2113 // Set state to shut down
2114 comp->set_shut_down();
2115
2116 // Delete all queued compilation tasks to make compiler threads exit faster.
2117 if (_c1_compile_queue != nullptr) {
2118 _c1_compile_queue->free_all();
2119 }
2120
2121 if (_c2_compile_queue != nullptr) {
2122 _c2_compile_queue->free_all();
2123 }
2124
2125 if (_c3_compile_queue != nullptr) {
2126 _c3_compile_queue->free_all();
2127 }
2128
2129 // Set flags so that we continue execution with using interpreter only.
2130 UseCompiler = false;
2131 UseInterpreter = true;
2132
2133 // We could delete compiler runtimes also. However, there are references to
2134 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
2135 // fail. This can be done later if necessary.
2136 }
2137 }
2138
2139 /**
2140 * Helper function to create new or reuse old CompileLog.
2141 */
2142 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2143 if (!LogCompilation) return nullptr;
2144
2145 AbstractCompiler *compiler = ct->compiler();
2146 bool jvmci = JVMCI_ONLY( compiler->is_jvmci() ||) false;
2147 bool c1 = compiler->is_c1();
2148 jobject* compiler_objects = c1 ? _compiler1_objects : (_c3_count == 0 ? _compiler2_objects : (jvmci ? _compiler2_objects : _compiler3_objects));
2149 assert(compiler_objects != nullptr, "must be initialized at this point");
2150 CompileLog** logs = c1 ? _compiler1_logs : (_c3_count == 0 ? _compiler2_logs : (jvmci ? _compiler2_logs : _compiler3_logs));
2151 assert(logs != nullptr, "must be initialized at this point");
2152 int count = c1 ? _c1_count : (_c3_count == 0 ? _c2_count : (jvmci ? _c2_count : _c3_count));
2153
2154 if (ct->queue() == _sc1_compile_queue || ct->queue() == _sc2_compile_queue) {
2155 compiler_objects = _sc_objects;
2156 logs = _sc_logs;
2157 count = _sc_count;
2158 }
2159 // Find Compiler number by its threadObj.
2160 oop compiler_obj = ct->threadObj();
2161 int compiler_number = 0;
2162 bool found = false;
2163 for (; compiler_number < count; compiler_number++) {
2164 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2165 found = true;
2166 break;
2167 }
2168 }
2169 assert(found, "Compiler must exist at this point");
2170
2171 // Determine pointer for this thread's log.
2172 CompileLog** log_ptr = &logs[compiler_number];
2173
2174 // Return old one if it exists.
2175 CompileLog* log = *log_ptr;
2176 if (log != nullptr) {
2177 ct->init_log(log);
2178 return log;
2179 }
2180
2181 // Create a new one and remember it.
2182 init_compiler_thread_log();
2183 log = ct->log();
2184 *log_ptr = log;
2185 return log;
2186 }
2187
2188 // ------------------------------------------------------------------
2189 // CompileBroker::compiler_thread_loop
2190 //
2191 // The main loop run by a CompilerThread.
2192 void CompileBroker::compiler_thread_loop() {
2193 CompilerThread* thread = CompilerThread::current();
2194 CompileQueue* queue = thread->queue();
2195 // For the thread that initializes the ciObjectFactory
2196 // this resource mark holds all the shared objects
2197 ResourceMark rm;
2198
2199 // First thread to get here will initialize the compiler interface
2200
2201 {
2202 ASSERT_IN_VM;
2203 MutexLocker only_one (thread, CompileThread_lock);
2204 if (!ciObjectFactory::is_initialized()) {
2205 ciObjectFactory::initialize();
2206 }
2207 }
2208
2209 // Open a log.
2210 CompileLog* log = get_log(thread);
2211 if (log != nullptr) {
2212 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
2213 thread->name(),
2214 os::current_thread_id(),
2215 os::current_process_id());
2216 log->stamp();
2217 log->end_elem();
2218 }
2219
2220 // If compiler thread/runtime initialization fails, exit the compiler thread
2221 if (!init_compiler_runtime()) {
2222 return;
2223 }
2224
2225 thread->start_idle_timer();
2226
2227 // Poll for new compilation tasks as long as the JVM runs. Compilation
2228 // should only be disabled if something went wrong while initializing the
2229 // compiler runtimes. This, in turn, should not happen. The only known case
2230 // when compiler runtime initialization fails is if there is not enough free
2231 // space in the code cache to generate the necessary stubs, etc.
2232 while (!is_compilation_disabled_forever()) {
2233 // We need this HandleMark to avoid leaking VM handles.
2234 HandleMark hm(thread);
2235
2236 RecompilationPolicy::recompilation_step(RecompilationWorkUnitSize, thread);
2237
2238 CompileTask* task = queue->get(thread);
2239
2240 if (task == nullptr) {
2241 if (UseDynamicNumberOfCompilerThreads) {
2242 // Access compiler_count under lock to enforce consistency.
2243 MutexLocker only_one(CompileThread_lock);
2244 if (can_remove(thread, true)) {
2245 if (trace_compiler_threads()) {
2246 ResourceMark rm;
2247 stringStream msg;
2248 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2249 thread->name(), thread->idle_time_millis());
2250 print_compiler_threads(msg);
2251 }
2252
2253 // Notify compiler that the compiler thread is about to stop
2254 thread->compiler()->stopping_compiler_thread(thread);
2255
2256 free_buffer_blob_if_allocated(thread);
2257 return; // Stop this thread.
2258 }
2259 }
2260 } else {
2261 // Assign the task to the current thread. Mark this compilation
2262 // thread as active for the profiler.
2263 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2264 // occurs after fetching the compile task off the queue.
2265 CompileTaskWrapper ctw(task);
2266 methodHandle method(thread, task->method());
2267
2268 // Never compile a method if breakpoints are present in it
2269 if (method()->number_of_breakpoints() == 0) {
2270 // Compile the method.
2271 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2272 invoke_compiler_on_method(task);
2273 thread->start_idle_timer();
2274 } else {
2275 // After compilation is disabled, remove remaining methods from queue
2276 method->clear_queued_for_compilation();
2277 method->set_pending_queue_processed(false);
2278 task->set_failure_reason("compilation is disabled");
2279 }
2280 } else {
2281 task->set_failure_reason("breakpoints are present");
2282 }
2283
2284 if (UseDynamicNumberOfCompilerThreads) {
2285 possibly_add_compiler_threads(thread);
2286 assert(!thread->has_pending_exception(), "should have been handled");
2287 }
2288 }
2289 }
2290
2291 // Shut down compiler runtime
2292 shutdown_compiler_runtime(thread->compiler(), thread);
2293 }
2294
2295 // ------------------------------------------------------------------
2296 // CompileBroker::init_compiler_thread_log
2297 //
2298 // Set up state required by +LogCompilation.
2299 void CompileBroker::init_compiler_thread_log() {
2300 CompilerThread* thread = CompilerThread::current();
2301 char file_name[4*K];
2302 FILE* fp = nullptr;
2303 intx thread_id = os::current_thread_id();
2304 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
2305 const char* dir = (try_temp_dir ? os::get_temp_directory() : nullptr);
2306 if (dir == nullptr) {
2307 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
2308 thread_id, os::current_process_id());
2309 } else {
2310 jio_snprintf(file_name, sizeof(file_name),
2311 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
2312 os::file_separator(), thread_id, os::current_process_id());
2313 }
2314
2315 fp = os::fopen(file_name, "wt");
2316 if (fp != nullptr) {
2317 if (LogCompilation && Verbose) {
2318 tty->print_cr("Opening compilation log %s", file_name);
2319 }
2320 CompileLog* log = new(mtCompiler) CompileLog(file_name, fp, thread_id);
2321 if (log == nullptr) {
2322 fclose(fp);
2323 return;
2324 }
2325 thread->init_log(log);
2326
2327 if (xtty != nullptr) {
2328 ttyLocker ttyl;
2329 // Record any per thread log files
2330 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
2331 }
2332 return;
2333 }
2334 }
2335 warning("Cannot open log file: %s", file_name);
2336 }
2337
2338 void CompileBroker::log_metaspace_failure() {
2339 const char* message = "some methods may not be compiled because metaspace "
2340 "is out of memory";
2341 if (CompilationLog::log() != nullptr) {
2342 CompilationLog::log()->log_metaspace_failure(message);
2343 }
2344 if (PrintCompilation) {
2345 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
2346 }
2347 }
2348
2349
2350 // ------------------------------------------------------------------
2351 // CompileBroker::set_should_block
2352 //
2353 // Set _should_block.
2354 // Call this from the VM, with Threads_lock held and a safepoint requested.
2355 void CompileBroker::set_should_block() {
2356 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
2357 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
2358 #ifndef PRODUCT
2359 if (PrintCompilation && (Verbose || WizardMode))
2360 tty->print_cr("notifying compiler thread pool to block");
2361 #endif
2362 _should_block = true;
2363 }
2364
2365 // ------------------------------------------------------------------
2366 // CompileBroker::maybe_block
2367 //
2368 // Call this from the compiler at convenient points, to poll for _should_block.
2369 void CompileBroker::maybe_block() {
2370 if (_should_block) {
2371 #ifndef PRODUCT
2372 if (PrintCompilation && (Verbose || WizardMode))
2373 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
2374 #endif
2375 ThreadInVMfromNative tivfn(JavaThread::current());
2376 }
2377 }
2378
2379 // wrapper for CodeCache::print_summary()
2380 static void codecache_print(bool detailed)
2381 {
2382 stringStream s;
2383 // Dump code cache into a buffer before locking the tty,
2384 {
2385 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2386 CodeCache::print_summary(&s, detailed);
2387 }
2388 ttyLocker ttyl;
2389 tty->print("%s", s.freeze());
2390 }
2391
2392 // wrapper for CodeCache::print_summary() using outputStream
2393 static void codecache_print(outputStream* out, bool detailed) {
2394 stringStream s;
2395
2396 // Dump code cache into a buffer
2397 {
2398 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2399 CodeCache::print_summary(&s, detailed);
2400 }
2401
2402 char* remaining_log = s.as_string();
2403 while (*remaining_log != '\0') {
2404 char* eol = strchr(remaining_log, '\n');
2405 if (eol == nullptr) {
2406 out->print_cr("%s", remaining_log);
2407 remaining_log = remaining_log + strlen(remaining_log);
2408 } else {
2409 *eol = '\0';
2410 out->print_cr("%s", remaining_log);
2411 remaining_log = eol + 1;
2412 }
2413 }
2414 }
2415
2416 void CompileBroker::handle_compile_error(CompilerThread* thread, CompileTask* task, ciEnv* ci_env,
2417 int compilable, const char* failure_reason) {
2418 if (!AbortVMOnCompilationFailure) {
2419 return;
2420 }
2421 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
2422 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
2423 }
2424 if (compilable == ciEnv::MethodCompilable_never) {
2425 fatal("Never compilable: %s", failure_reason);
2426 }
2427 }
2428
2429 static void post_compilation_event(EventCompilation& event, CompileTask* task) {
2430 assert(task != nullptr, "invariant");
2431 CompilerEvent::CompilationEvent::post(event,
2432 task->compile_id(),
2433 task->compiler()->type(),
2434 task->method(),
2435 task->comp_level(),
2436 task->is_success(),
2437 task->osr_bci() != CompileBroker::standard_entry_bci,
2438 task->nm_total_size(),
2439 task->num_inlined_bytecodes(),
2440 task->arena_bytes());
2441 }
2442
2443 int DirectivesStack::_depth = 0;
2444 CompilerDirectives* DirectivesStack::_top = nullptr;
2445 CompilerDirectives* DirectivesStack::_bottom = nullptr;
2446
2447 // Acquires Compilation_lock and waits for it to be notified
2448 // as long as WhiteBox::compilation_locked is true.
2449 static void whitebox_lock_compilation() {
2450 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2451 while (WhiteBox::compilation_locked) {
2452 locker.wait();
2453 }
2454 }
2455
2456 // ------------------------------------------------------------------
2457 // CompileBroker::invoke_compiler_on_method
2458 //
2459 // Compile a method.
2460 //
2461 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2462 task->print_ul();
2463 elapsedTimer time;
2464
2465 DirectiveSet* directive = task->directive();
2466 if (directive->PrintCompilationOption) {
2467 ResourceMark rm;
2468 task->print_tty();
2469 }
2470
2471 CompilerThread* thread = CompilerThread::current();
2472 ResourceMark rm(thread);
2473
2474 if (CompilationLog::log() != nullptr) {
2475 CompilationLog::log()->log_compile(thread, task);
2476 }
2477
2478 // Common flags.
2479 int compile_id = task->compile_id();
2480 int osr_bci = task->osr_bci();
2481 bool is_osr = (osr_bci != standard_entry_bci);
2482 bool should_log = (thread->log() != nullptr);
2483 bool should_break = false;
2484 const int task_level = task->comp_level();
2485 AbstractCompiler* comp = task->compiler();
2486 {
2487 // create the handle inside it's own block so it can't
2488 // accidentally be referenced once the thread transitions to
2489 // native. The NoHandleMark before the transition should catch
2490 // any cases where this occurs in the future.
2491 methodHandle method(thread, task->method());
2492
2493 assert(!method->is_native(), "no longer compile natives");
2494
2495 // Update compile information when using perfdata.
2496 if (UsePerfData) {
2497 update_compile_perf_data(thread, method, is_osr);
2498 }
2499
2500 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2501 }
2502
2503 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2504 if (should_log && !directive->LogOption) {
2505 should_log = false;
2506 }
2507
2508 // Allocate a new set of JNI handles.
2509 JNIHandleMark jhm(thread);
2510 Method* target_handle = task->method();
2511 int compilable = ciEnv::MethodCompilable;
2512 const char* failure_reason = nullptr;
2513 bool failure_reason_on_C_heap = false;
2514 const char* retry_message = nullptr;
2515
2516 #if INCLUDE_JVMCI
2517 if (UseJVMCICompiler && comp != nullptr && comp->is_jvmci()) {
2518 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2519
2520 TraceTime t1("compilation", &time);
2521 EventCompilation event;
2522 JVMCICompileState compile_state(task, jvmci);
2523 JVMCIRuntime *runtime = nullptr;
2524
2525 if (JVMCI::in_shutdown()) {
2526 failure_reason = "in JVMCI shutdown";
2527 retry_message = "not retryable";
2528 compilable = ciEnv::MethodCompilable_never;
2529 } else if (compile_state.target_method_is_old()) {
2530 // Skip redefined methods
2531 failure_reason = "redefined method";
2532 retry_message = "not retryable";
2533 compilable = ciEnv::MethodCompilable_never;
2534 } else {
2535 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2536 if (env.init_error() != JNI_OK) {
2537 const char* msg = env.init_error_msg();
2538 failure_reason = os::strdup(err_msg("Error attaching to libjvmci (err: %d, %s)",
2539 env.init_error(), msg == nullptr ? "unknown" : msg), mtJVMCI);
2540 bool reason_on_C_heap = true;
2541 // In case of JNI_ENOMEM, there's a good chance a subsequent attempt to create libjvmci or attach to it
2542 // might succeed. Other errors most likely indicate a non-recoverable error in the JVMCI runtime.
2543 bool retryable = env.init_error() == JNI_ENOMEM;
2544 compile_state.set_failure(retryable, failure_reason, reason_on_C_heap);
2545 }
2546 if (failure_reason == nullptr) {
2547 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2548 // Must switch to native to block
2549 ThreadToNativeFromVM ttn(thread);
2550 whitebox_lock_compilation();
2551 }
2552 methodHandle method(thread, target_handle);
2553 runtime = env.runtime();
2554 runtime->compile_method(&env, jvmci, method, osr_bci);
2555
2556 failure_reason = compile_state.failure_reason();
2557 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2558 if (!compile_state.retryable()) {
2559 retry_message = "not retryable";
2560 compilable = ciEnv::MethodCompilable_not_at_tier;
2561 }
2562 if (!task->is_success()) {
2563 assert(failure_reason != nullptr, "must specify failure_reason");
2564 }
2565 }
2566 }
2567 if (!task->is_success() && !JVMCI::in_shutdown()) {
2568 handle_compile_error(thread, task, nullptr, compilable, failure_reason);
2569 }
2570 if (event.should_commit()) {
2571 post_compilation_event(event, task);
2572 }
2573
2574 if (runtime != nullptr) {
2575 runtime->post_compile(thread);
2576 }
2577 } else
2578 #endif // INCLUDE_JVMCI
2579 {
2580 NoHandleMark nhm;
2581 ThreadToNativeFromVM ttn(thread);
2582
2583 ciEnv ci_env(task);
2584 if (should_break) {
2585 ci_env.set_break_at_compile(true);
2586 }
2587 if (should_log) {
2588 ci_env.set_log(thread->log());
2589 }
2590 assert(thread->env() == &ci_env, "set by ci_env");
2591 // The thread-env() field is cleared in ~CompileTaskWrapper.
2592
2593 // Cache Jvmti state
2594 bool method_is_old = ci_env.cache_jvmti_state();
2595
2596 // Skip redefined methods
2597 if (method_is_old) {
2598 ci_env.record_method_not_compilable("redefined method", true);
2599 }
2600
2601 // Cache DTrace flags
2602 ci_env.cache_dtrace_flags();
2603
2604 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2605
2606 TraceTime t1("compilation", &time);
2607 EventCompilation event;
2608
2609 bool install_code = true;
2610 if (comp == nullptr) {
2611 ci_env.record_method_not_compilable("no compiler");
2612 } else if (!ci_env.failing()) {
2613 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2614 whitebox_lock_compilation();
2615 }
2616 if (StoreCachedCode && task->is_precompiled()) {
2617 install_code = false; // not suitable in the current context
2618 }
2619 comp->compile_method(&ci_env, target, osr_bci, install_code, directive);
2620
2621 /* Repeat compilation without installing code for profiling purposes */
2622 int repeat_compilation_count = directive->RepeatCompilationOption;
2623 while (repeat_compilation_count > 0) {
2624 ResourceMark rm(thread);
2625 task->print_ul("NO CODE INSTALLED");
2626 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2627 repeat_compilation_count--;
2628 }
2629 }
2630
2631 DirectivesStack::release(directive);
2632
2633 if (!ci_env.failing() && !task->is_success() && install_code) {
2634 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2635 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2636 // The compiler elected, without comment, not to register a result.
2637 // Do not attempt further compilations of this method.
2638 ci_env.record_method_not_compilable("compile failed");
2639 }
2640
2641 // Copy this bit to the enclosing block:
2642 compilable = ci_env.compilable();
2643
2644 if (ci_env.failing()) {
2645 // Duplicate the failure reason string, so that it outlives ciEnv
2646 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2647 failure_reason_on_C_heap = true;
2648 retry_message = ci_env.retry_message();
2649 ci_env.report_failure(failure_reason);
2650 }
2651
2652 if (ci_env.failing()) {
2653 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2654 }
2655 if (event.should_commit()) {
2656 post_compilation_event(event, task);
2657 }
2658 }
2659
2660 if (failure_reason != nullptr) {
2661 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2662 if (CompilationLog::log() != nullptr) {
2663 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2664 }
2665 if (PrintCompilation) {
2666 FormatBufferResource msg = retry_message != nullptr ?
2667 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2668 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2669 task->print(tty, msg);
2670 }
2671 }
2672
2673 task->mark_finished(os::elapsed_counter());
2674
2675 methodHandle method(thread, task->method());
2676
2677 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2678
2679 collect_statistics(thread, time, task);
2680
2681 if (PrintCompilation && PrintCompilation2) {
2682 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2683 tty->print("%4d ", compile_id); // print compilation number
2684 tty->print("%s ", (is_osr ? "%" : (task->is_scc() ? "A" : " ")));
2685 if (task->is_success()) {
2686 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2687 }
2688 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2689 }
2690
2691 Log(compilation, codecache) log;
2692 if (log.is_debug()) {
2693 LogStream ls(log.debug());
2694 codecache_print(&ls, /* detailed= */ false);
2695 }
2696 if (PrintCodeCacheOnCompilation) {
2697 codecache_print(/* detailed= */ false);
2698 }
2699 // Disable compilation, if required.
2700 switch (compilable) {
2701 case ciEnv::MethodCompilable_never:
2702 if (is_osr)
2703 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2704 else
2705 method->set_not_compilable_quietly("MethodCompilable_never");
2706 break;
2707 case ciEnv::MethodCompilable_not_at_tier:
2708 if (is_osr)
2709 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2710 else
2711 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2712 break;
2713 }
2714
2715 // Note that the queued_for_compilation bits are cleared without
2716 // protection of a mutex. [They were set by the requester thread,
2717 // when adding the task to the compile queue -- at which time the
2718 // compile queue lock was held. Subsequently, we acquired the compile
2719 // queue lock to get this task off the compile queue; thus (to belabour
2720 // the point somewhat) our clearing of the bits must be occurring
2721 // only after the setting of the bits. See also 14012000 above.
2722 method->clear_queued_for_compilation();
2723 method->set_pending_queue_processed(false);
2724
2725 if (PrintCompilation) {
2726 ResourceMark rm;
2727 task->print_tty();
2728 }
2729 }
2730
2731 /**
2732 * The CodeCache is full. Print warning and disable compilation.
2733 * Schedule code cache cleaning so compilation can continue later.
2734 * This function needs to be called only from CodeCache::allocate(),
2735 * since we currently handle a full code cache uniformly.
2736 */
2737 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2738 UseInterpreter = true;
2739 if (UseCompiler || AlwaysCompileLoopMethods ) {
2740 if (xtty != nullptr) {
2741 stringStream s;
2742 // Dump code cache state into a buffer before locking the tty,
2743 // because log_state() will use locks causing lock conflicts.
2744 CodeCache::log_state(&s);
2745 // Lock to prevent tearing
2746 ttyLocker ttyl;
2747 xtty->begin_elem("code_cache_full");
2748 xtty->print("%s", s.freeze());
2749 xtty->stamp();
2750 xtty->end_elem();
2751 }
2752
2753 #ifndef PRODUCT
2754 if (ExitOnFullCodeCache) {
2755 codecache_print(/* detailed= */ true);
2756 before_exit(JavaThread::current());
2757 exit_globals(); // will delete tty
2758 vm_direct_exit(1);
2759 }
2760 #endif
2761 if (UseCodeCacheFlushing) {
2762 // Since code cache is full, immediately stop new compiles
2763 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2764 log_info(codecache)("Code cache is full - disabling compilation");
2765 }
2766 } else {
2767 disable_compilation_forever();
2768 }
2769
2770 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2771 }
2772 }
2773
2774 // ------------------------------------------------------------------
2775 // CompileBroker::update_compile_perf_data
2776 //
2777 // Record this compilation for debugging purposes.
2778 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2779 ResourceMark rm;
2780 char* method_name = method->name()->as_C_string();
2781 char current_method[CompilerCounters::cmname_buffer_length];
2782 size_t maxLen = CompilerCounters::cmname_buffer_length;
2783
2784 const char* class_name = method->method_holder()->name()->as_C_string();
2785
2786 size_t s1len = strlen(class_name);
2787 size_t s2len = strlen(method_name);
2788
2789 // check if we need to truncate the string
2790 if (s1len + s2len + 2 > maxLen) {
2791
2792 // the strategy is to lop off the leading characters of the
2793 // class name and the trailing characters of the method name.
2794
2795 if (s2len + 2 > maxLen) {
2796 // lop of the entire class name string, let snprintf handle
2797 // truncation of the method name.
2798 class_name += s1len; // null string
2799 }
2800 else {
2801 // lop off the extra characters from the front of the class name
2802 class_name += ((s1len + s2len + 2) - maxLen);
2803 }
2804 }
2805
2806 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2807
2808 int last_compile_type = normal_compile;
2809 if (CICountOSR && is_osr) {
2810 last_compile_type = osr_compile;
2811 } else if (CICountNative && method->is_native()) {
2812 last_compile_type = native_compile;
2813 }
2814
2815 CompilerCounters* counters = thread->counters();
2816 counters->set_current_method(current_method);
2817 counters->set_compile_type((jlong) last_compile_type);
2818 }
2819
2820 // ------------------------------------------------------------------
2821 // CompileBroker::collect_statistics
2822 //
2823 // Collect statistics about the compilation.
2824
2825 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2826 bool success = task->is_success();
2827 methodHandle method (thread, task->method());
2828 int compile_id = task->compile_id();
2829 bool is_osr = (task->osr_bci() != standard_entry_bci);
2830 const int comp_level = task->comp_level();
2831 CompilerCounters* counters = thread->counters();
2832
2833 MutexLocker locker(CompileStatistics_lock);
2834
2835 // _perf variables are production performance counters which are
2836 // updated regardless of the setting of the CITime and CITimeEach flags
2837 //
2838
2839 // account all time, including bailouts and failures in this counter;
2840 // C1 and C2 counters are counting both successful and unsuccessful compiles
2841 _t_total_compilation.add(&time);
2842
2843 if (!success) {
2844 _total_bailout_count++;
2845 if (UsePerfData) {
2846 _perf_last_failed_method->set_value(counters->current_method());
2847 _perf_last_failed_type->set_value(counters->compile_type());
2848 _perf_total_bailout_count->inc();
2849 }
2850 _t_bailedout_compilation.add(&time);
2851
2852 if (CITime || log_is_enabled(Info, init)) {
2853 CompilerStatistics* stats = nullptr;
2854 if (task->is_scc()) {
2855 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2856 stats = &_scc_stats_per_level[level];
2857 } else {
2858 stats = &_stats_per_level[comp_level-1];
2859 }
2860 stats->_bailout.update(time, 0);
2861 }
2862 } else if (!task->is_success()) {
2863 if (UsePerfData) {
2864 _perf_last_invalidated_method->set_value(counters->current_method());
2865 _perf_last_invalidated_type->set_value(counters->compile_type());
2866 _perf_total_invalidated_count->inc();
2867 }
2868 _total_invalidated_count++;
2869 _t_invalidated_compilation.add(&time);
2870
2871 if (CITime || log_is_enabled(Info, init)) {
2872 CompilerStatistics* stats = nullptr;
2873 if (task->is_scc()) {
2874 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2875 stats = &_scc_stats_per_level[level];
2876 } else {
2877 stats = &_stats_per_level[comp_level-1];
2878 }
2879 stats->_invalidated.update(time, 0);
2880 }
2881 } else {
2882 // Compilation succeeded
2883
2884 // update compilation ticks - used by the implementation of
2885 // java.lang.management.CompilationMXBean
2886 _perf_total_compilation->inc(time.ticks());
2887 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2888
2889 if (CITime || log_is_enabled(Info, init)) {
2890 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2891 if (is_osr) {
2892 _t_osr_compilation.add(&time);
2893 _sum_osr_bytes_compiled += bytes_compiled;
2894 } else {
2895 _t_standard_compilation.add(&time);
2896 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2897 }
2898
2899 // Collect statistic per compilation level
2900 if (task->is_scc()) {
2901 _scc_stats._standard.update(time, bytes_compiled);
2902 _scc_stats._nmethods_size += task->nm_total_size();
2903 _scc_stats._nmethods_code_size += task->nm_insts_size();
2904 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2905 CompilerStatistics* stats = &_scc_stats_per_level[level];
2906 stats->_standard.update(time, bytes_compiled);
2907 stats->_nmethods_size += task->nm_total_size();
2908 stats->_nmethods_code_size += task->nm_insts_size();
2909 } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2910 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2911 if (is_osr) {
2912 stats->_osr.update(time, bytes_compiled);
2913 } else {
2914 stats->_standard.update(time, bytes_compiled);
2915 }
2916 stats->_nmethods_size += task->nm_total_size();
2917 stats->_nmethods_code_size += task->nm_insts_size();
2918 } else {
2919 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2920 }
2921
2922 // Collect statistic per compiler
2923 AbstractCompiler* comp = task->compiler();
2924 if (comp && !task->is_scc()) {
2925 CompilerStatistics* stats = comp->stats();
2926 if (is_osr) {
2927 stats->_osr.update(time, bytes_compiled);
2928 } else {
2929 stats->_standard.update(time, bytes_compiled);
2930 }
2931 stats->_nmethods_size += task->nm_total_size();
2932 stats->_nmethods_code_size += task->nm_insts_size();
2933 } else if (!task->is_scc()) { // if (!comp)
2934 assert(false, "Compiler object must exist");
2935 }
2936 }
2937
2938 if (UsePerfData) {
2939 // save the name of the last method compiled
2940 _perf_last_method->set_value(counters->current_method());
2941 _perf_last_compile_type->set_value(counters->compile_type());
2942 _perf_last_compile_size->set_value(method->code_size() +
2943 task->num_inlined_bytecodes());
2944 if (is_osr) {
2945 _perf_osr_compilation->inc(time.ticks());
2946 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2947 } else {
2948 _perf_standard_compilation->inc(time.ticks());
2949 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2950 }
2951 }
2952
2953 if (CITimeEach) {
2954 double compile_time = time.seconds();
2955 double bytes_per_sec = compile_time == 0.0 ? 0.0 : (double)(method->code_size() + task->num_inlined_bytecodes()) / compile_time;
2956 tty->print_cr("%3d seconds: %6.3f bytes/sec : %f (bytes %d + %d inlined)",
2957 compile_id, compile_time, bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2958 }
2959
2960 // Collect counts of successful compilations
2961 _sum_nmethod_size += task->nm_total_size();
2962 _sum_nmethod_code_size += task->nm_insts_size();
2963 _total_compile_count++;
2964
2965 if (UsePerfData) {
2966 _perf_sum_nmethod_size->inc( task->nm_total_size());
2967 _perf_sum_nmethod_code_size->inc(task->nm_insts_size());
2968 _perf_total_compile_count->inc();
2969 }
2970
2971 if (is_osr) {
2972 if (UsePerfData) _perf_total_osr_compile_count->inc();
2973 _total_osr_compile_count++;
2974 } else {
2975 if (UsePerfData) _perf_total_standard_compile_count->inc();
2976 _total_standard_compile_count++;
2977 }
2978 }
2979 // set the current method for the thread to null
2980 if (UsePerfData) counters->set_current_method("");
2981 }
2982
2983 const char* CompileBroker::compiler_name(int comp_level) {
2984 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2985 if (comp == nullptr) {
2986 return "no compiler";
2987 } else {
2988 return (comp->name());
2989 }
2990 }
2991
2992 jlong CompileBroker::total_compilation_ticks() {
2993 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2994 }
2995
2996 void CompileBroker::log_not_entrant(nmethod* nm) {
2997 _total_not_entrant_count++;
2998 if (CITime || log_is_enabled(Info, init)) {
2999 CompilerStatistics* stats = nullptr;
3000 int level = nm->comp_level();
3001 if (nm->is_scc()) {
3002 if (nm->preloaded()) {
3003 assert(level == CompLevel_full_optimization, "%d", level);
3004 level = CompLevel_full_optimization + 1;
3005 }
3006 stats = &_scc_stats_per_level[level - 1];
3007 } else {
3008 stats = &_stats_per_level[level - 1];
3009 }
3010 stats->_made_not_entrant._count++;
3011 }
3012 }
3013
3014 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
3015 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}",
3016 name, stats->bytes_per_second(),
3017 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
3018 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
3019 stats->_nmethods_size, stats->_nmethods_code_size);
3020 }
3021
3022 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
3023 if (data._count > 0) {
3024 st->print("; %s: %4u methods", name, data._count);
3025 if (print_time) {
3026 st->print(" (in %.3fs)", data._time.seconds());
3027 }
3028 }
3029 }
3030
3031 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
3032 st->print(" %s%d: %5u methods", prefix, tier, stats->_standard._count);
3033 if (stats->_standard._count > 0) {
3034 st->print(" (in %.3fs)", stats->_standard._time.seconds());
3035 }
3036 print_helper(st, "osr", stats->_osr);
3037 print_helper(st, "bailout", stats->_bailout);
3038 print_helper(st, "invalid", stats->_invalidated);
3039 print_helper(st, "not_entrant", stats->_made_not_entrant, false);
3040 st->cr();
3041 }
3042
3043 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3044 if (queue != nullptr) {
3045 MutexLocker ml(queue->lock());
3046
3047 uint total_cnt = 0;
3048 uint active_cnt = 0;
3049 for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3050 guarantee(jt != nullptr, "");
3051 if (jt->is_Compiler_thread()) {
3052 CompilerThread* ct = (CompilerThread*)jt;
3053
3054 guarantee(ct != nullptr, "");
3055 if (ct->queue() == queue) {
3056 ++total_cnt;
3057 CompileTask* task = ct->task();
3058 if (task != nullptr) {
3059 ++active_cnt;
3060 }
3061 }
3062 }
3063 }
3064
3065 st->print(" %s (%d active / %d total threads): %u tasks",
3066 queue->name(), active_cnt, total_cnt, queue->size());
3067 if (queue->size() > 0) {
3068 uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3069 for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3070 int tier = task->comp_level();
3071 if (task->is_scc() && task->preload()) {
3072 assert(tier == CompLevel_full_optimization, "%d", tier);
3073 tier = CompLevel_full_optimization + 1;
3074 }
3075 counts[tier-1]++;
3076 }
3077 st->print(":");
3078 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3079 uint cnt = counts[tier-1];
3080 if (cnt > 0) {
3081 st->print(" T%d: %u tasks;", tier, cnt);
3082 }
3083 }
3084 }
3085 st->cr();
3086
3087 // for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3088 // guarantee(jt != nullptr, "");
3089 // if (jt->is_Compiler_thread()) {
3090 // CompilerThread* ct = (CompilerThread*)jt;
3091 //
3092 // guarantee(ct != nullptr, "");
3093 // if (ct->queue() == queue) {
3094 // ResourceMark rm;
3095 // CompileTask* task = ct->task();
3096 // st->print(" %s: ", ct->name_raw());
3097 // if (task != nullptr) {
3098 // task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3099 // }
3100 // st->cr();
3101 // }
3102 // }
3103 // }
3104 }
3105 }
3106 void CompileBroker::print_statistics_on(outputStream* st) {
3107 st->print_cr(" Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3108 _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3109 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3110 print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3111 }
3112 st->cr();
3113
3114 if (LoadCachedCode || StoreCachedCode) {
3115 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3116 if (tier != CompLevel_full_profile) {
3117 print_tier_helper(st, "SC T", tier, &_scc_stats_per_level[tier - 1]);
3118 }
3119 }
3120 st->cr();
3121 }
3122
3123 print_queue_info(st, _c1_compile_queue);
3124 print_queue_info(st, _c2_compile_queue);
3125 print_queue_info(st, _c3_compile_queue);
3126 print_queue_info(st, _sc1_compile_queue);
3127 print_queue_info(st, _sc2_compile_queue);
3128 }
3129
3130 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3131 if (per_compiler) {
3132 if (aggregate) {
3133 tty->cr();
3134 tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3135 tty->print_cr("------------------------------------------------");
3136 tty->cr();
3137 }
3138 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3139 AbstractCompiler* comp = _compilers[i];
3140 if (comp != nullptr) {
3141 print_times(comp->name(), comp->stats());
3142 }
3143 }
3144 if (_scc_stats._standard._count > 0) {
3145 print_times("SC", &_scc_stats);
3146 }
3147 if (aggregate) {
3148 tty->cr();
3149 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3150 tty->print_cr("------------------------------------------------");
3151 tty->cr();
3152 }
3153 char tier_name[256];
3154 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3155 CompilerStatistics* stats = &_stats_per_level[tier-1];
3156 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3157 print_times(tier_name, stats);
3158 }
3159 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3160 CompilerStatistics* stats = &_scc_stats_per_level[tier-1];
3161 if (stats->_standard._bytes > 0) {
3162 os::snprintf_checked(tier_name, sizeof(tier_name), "SC T%d", tier);
3163 print_times(tier_name, stats);
3164 }
3165 }
3166 }
3167
3168 if (!aggregate) {
3169 return;
3170 }
3171
3172 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3173 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3174 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3175
3176 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3177 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3178
3179 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3180 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3181 uint total_compile_count = CompileBroker::_total_compile_count;
3182 uint total_bailout_count = CompileBroker::_total_bailout_count;
3183 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3184
3185 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
3186 uint nmethods_size = CompileBroker::_sum_nmethod_size;
3187
3188 tty->cr();
3189 tty->print_cr("Accumulated compiler times");
3190 tty->print_cr("----------------------------------------------------------");
3191 //0000000000111111111122222222223333333333444444444455555555556666666666
3192 //0123456789012345678901234567890123456789012345678901234567890123456789
3193 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
3194 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
3195 standard_compilation.seconds(),
3196 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3197 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
3198 CompileBroker::_t_bailedout_compilation.seconds(),
3199 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3200 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
3201 osr_compilation.seconds(),
3202 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3203 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
3204 CompileBroker::_t_invalidated_compilation.seconds(),
3205 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3206
3207 if (StoreCachedCode || LoadCachedCode) { // Check flags because SC cache could be closed already
3208 tty->cr();
3209 SCCache::print_timers_on(tty);
3210 }
3211 AbstractCompiler *comp = compiler(CompLevel_simple);
3212 if (comp != nullptr) {
3213 tty->cr();
3214 comp->print_timers();
3215 }
3216 comp = compiler(CompLevel_full_optimization);
3217 if (comp != nullptr) {
3218 tty->cr();
3219 comp->print_timers();
3220 }
3221 comp = _compilers[2];
3222 if (comp != nullptr) {
3223 tty->cr();
3224 comp->print_timers();
3225 }
3226 #if INCLUDE_JVMCI
3227 if (EnableJVMCI) {
3228 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3229 if (jvmci_comp != nullptr && jvmci_comp != comp) {
3230 tty->cr();
3231 jvmci_comp->print_timers();
3232 }
3233 }
3234 #endif
3235
3236 tty->cr();
3237 tty->print_cr(" Total compiled methods : %8u methods", total_compile_count);
3238 tty->print_cr(" Standard compilation : %8u methods", standard_compile_count);
3239 tty->print_cr(" On stack replacement : %8u methods", osr_compile_count);
3240 uint tcb = osr_bytes_compiled + standard_bytes_compiled;
3241 tty->print_cr(" Total compiled bytecodes : %8u bytes", tcb);
3242 tty->print_cr(" Standard compilation : %8u bytes", standard_bytes_compiled);
3243 tty->print_cr(" On stack replacement : %8u bytes", osr_bytes_compiled);
3244 double tcs = total_compilation.seconds();
3245 uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
3246 tty->print_cr(" Average compilation speed : %8u bytes/s", bps);
3247 tty->cr();
3248 tty->print_cr(" nmethod code size : %8u bytes", nmethods_code_size);
3249 tty->print_cr(" nmethod total size : %8u bytes", nmethods_size);
3250 }
3251
3252 // Print general/accumulated JIT information.
3253 void CompileBroker::print_info(outputStream *out) {
3254 if (out == nullptr) out = tty;
3255 out->cr();
3256 out->print_cr("======================");
3257 out->print_cr(" General JIT info ");
3258 out->print_cr("======================");
3259 out->cr();
3260 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
3261 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
3262 out->cr();
3263 out->print_cr("CodeCache overview");
3264 out->print_cr("--------------------------------------------------------");
3265 out->cr();
3266 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
3267 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
3268 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
3269 out->cr();
3270 }
3271
3272 // Note: tty_lock must not be held upon entry to this function.
3273 // Print functions called from herein do "micro-locking" on tty_lock.
3274 // That's a tradeoff which keeps together important blocks of output.
3275 // At the same time, continuous tty_lock hold time is kept in check,
3276 // preventing concurrently printing threads from stalling a long time.
3277 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
3278 TimeStamp ts_total;
3279 TimeStamp ts_global;
3280 TimeStamp ts;
3281
3282 bool allFun = !strcmp(function, "all");
3283 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
3284 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
3285 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
3286 bool methodCount = !strcmp(function, "MethodCount") || allFun;
3287 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
3288 bool methodAge = !strcmp(function, "MethodAge") || allFun;
3289 bool methodNames = !strcmp(function, "MethodNames") || allFun;
3290 bool discard = !strcmp(function, "discard") || allFun;
3291
3292 if (out == nullptr) {
3293 out = tty;
3294 }
3295
3296 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
3297 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
3298 out->cr();
3299 return;
3300 }
3301
3302 ts_total.update(); // record starting point
3303
3304 if (aggregate) {
3305 print_info(out);
3306 }
3307
3308 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
3309 // That prevents other threads from destroying (making inconsistent) our view on the CodeHeap.
3310 // When we request individual parts of the analysis via the jcmd interface, it is possible
3311 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
3312 // updated the aggregated data. We will then see a modified, but again consistent, view
3313 // on the CodeHeap. That's a tolerable tradeoff we have to accept because we can't hold
3314 // a lock across user interaction.
3315
3316 // We should definitely acquire this lock before acquiring Compile_lock and CodeCache_lock.
3317 // CodeHeapStateAnalytics_lock may be held by a concurrent thread for a long time,
3318 // leading to an unnecessarily long hold time of the other locks we acquired before.
3319 ts.update(); // record starting point
3320 MutexLocker mu0(CodeHeapStateAnalytics_lock, Mutex::_safepoint_check_flag);
3321 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
3322
3323 // Holding the CodeCache_lock protects from concurrent alterations of the CodeCache.
3324 // Unfortunately, such protection is not sufficient:
3325 // When a new nmethod is created via ciEnv::register_method(), the
3326 // Compile_lock is taken first. After some initializations,
3327 // nmethod::new_nmethod() takes over, grabbing the CodeCache_lock
3328 // immediately (after finalizing the oop references). To lock out concurrent
3329 // modifiers, we have to grab both locks as well in the described sequence.
3330 //
3331 // If we serve an "allFun" call, it is beneficial to hold CodeCache_lock and Compile_lock
3332 // for the entire duration of aggregation and printing. That makes sure we see
3333 // a consistent picture and do not run into issues caused by concurrent alterations.
3334 bool should_take_Compile_lock = !SafepointSynchronize::is_at_safepoint() &&
3335 !Compile_lock->owned_by_self();
3336 bool should_take_CodeCache_lock = !SafepointSynchronize::is_at_safepoint() &&
3337 !CodeCache_lock->owned_by_self();
3338 bool take_global_lock_1 = allFun && should_take_Compile_lock;
3339 bool take_global_lock_2 = allFun && should_take_CodeCache_lock;
3340 bool take_function_lock_1 = !allFun && should_take_Compile_lock;
3341 bool take_function_lock_2 = !allFun && should_take_CodeCache_lock;
3342 bool take_global_locks = take_global_lock_1 || take_global_lock_2;
3343 bool take_function_locks = take_function_lock_1 || take_function_lock_2;
3344
3345 ts_global.update(); // record starting point
3346
3347 ConditionalMutexLocker mu1(Compile_lock, take_global_lock_1, Mutex::_safepoint_check_flag);
3348 ConditionalMutexLocker mu2(CodeCache_lock, take_global_lock_2, Mutex::_no_safepoint_check_flag);
3349 if (take_global_locks) {
3350 out->print_cr("\n__ Compile & CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
3351 ts_global.update(); // record starting point
3352 }
3353
3354 if (aggregate) {
3355 ts.update(); // record starting point
3356 ConditionalMutexLocker mu11(Compile_lock, take_function_lock_1, Mutex::_safepoint_check_flag);
3357 ConditionalMutexLocker mu22(CodeCache_lock, take_function_lock_2, Mutex::_no_safepoint_check_flag);
3358 if (take_function_locks) {
3359 out->print_cr("\n__ Compile & CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
3360 }
3361
3362 ts.update(); // record starting point
3363 CodeCache::aggregate(out, granularity);
3364 if (take_function_locks) {
3365 out->print_cr("\n__ Compile & CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
3366 }
3367 }
3368
3369 if (usedSpace) CodeCache::print_usedSpace(out);
3370 if (freeSpace) CodeCache::print_freeSpace(out);
3371 if (methodCount) CodeCache::print_count(out);
3372 if (methodSpace) CodeCache::print_space(out);
3373 if (methodAge) CodeCache::print_age(out);
3374 if (methodNames) {
3375 if (allFun) {
3376 // print_names() can only be used safely if the locks have been continuously held
3377 // since aggregation begin. That is true only for function "all".
3378 CodeCache::print_names(out);
3379 } else {
3380 out->print_cr("\nCodeHeapStateAnalytics: Function 'MethodNames' is only available as part of function 'all'");
3381 }
3382 }
3383 if (discard) CodeCache::discard(out);
3384
3385 if (take_global_locks) {
3386 out->print_cr("\n__ Compile & CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
3387 }
3388 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
3389 }