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 tdata->record_compilation_queued(task);
381 task->set_training_data(tdata);
382 }
383 }
384
385 // Notify CompilerThreads that a task is available.
386 _lock->notify_all();
387 }
388
389 void CompileQueue::add_pending(CompileTask* task) {
390 assert(_lock->owned_by_self() == false, "must NOT own lock");
391 assert(UseLockFreeCompileQueues, "");
392 task->method()->set_queued_for_compilation();
393 _queue.push(*task);
394 // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
395 if (is_empty()) {
396 MutexLocker ml(_lock);
397 _lock->notify_all();
398 }
399 }
400
401 static bool process_pending(CompileTask* task) {
402 // guarantee(task->method()->queued_for_compilation(), "");
403 if (task->is_unloaded()) {
404 return true; // unloaded
405 }
406 task->method()->set_queued_for_compilation(); // FIXME
407 if (task->method()->pending_queue_processed()) {
408 return true; // already queued
409 }
410 // Mark the method as being in the compile queue.
411 task->method()->set_pending_queue_processed();
412 if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
413 task->requires_online_compilation(), task->compile_reason())) {
414 return true; // already compiled
415 }
416 return false; // active
417 }
418
419 void CompileQueue::transfer_pending() {
420 assert(_lock->owned_by_self(), "must own lock");
421 while (!_queue.empty()) {
422 CompileTask* task = _queue.pop();
423 bool is_stale = process_pending(task);
424 if (is_stale) {
425 task->set_next(_first_stale);
426 task->set_prev(nullptr);
427 _first_stale = task;
428 } else {
429 add(task);
430 }
431 }
432 }
433
434 /**
435 * Empties compilation queue by putting all compilation tasks onto
436 * a freelist. Furthermore, the method wakes up all threads that are
437 * waiting on a compilation task to finish. This can happen if background
438 * compilation is disabled.
439 */
440 void CompileQueue::free_all() {
441 MutexLocker mu(_lock);
442 transfer_pending();
443
444 CompileTask* next = _first;
445
446 // Iterate over all tasks in the compile queue
447 while (next != nullptr) {
448 CompileTask* current = next;
449 next = current->next();
450 {
451 // Wake up thread that blocks on the compile task.
452 MutexLocker ct_lock(current->lock());
453 current->lock()->notify();
454 }
455 // Put the task back on the freelist.
456 CompileTask::free(current);
457 }
458 _first = nullptr;
459 _last = nullptr;
460
461 // Wake up all threads that block on the queue.
462 _lock->notify_all();
463 }
464
465 /**
466 * Get the next CompileTask from a CompileQueue
467 */
468 CompileTask* CompileQueue::get(CompilerThread* thread) {
469 // save methods from RedefineClasses across safepoint
470 // across compile queue lock below.
471 methodHandle save_method;
472 methodHandle save_hot_method;
473
474 MonitorLocker locker(_lock);
475 transfer_pending();
476
477 RecompilationPolicy::sample_load_average();
478
479 // If _first is null we have no more compile jobs. There are two reasons for
480 // having no compile jobs: First, we compiled everything we wanted. Second,
481 // we ran out of code cache so compilation has been disabled. In the latter
482 // case we perform code cache sweeps to free memory such that we can re-enable
483 // compilation.
484 while (_first == nullptr) {
485 // Exit loop if compilation is disabled forever
486 if (CompileBroker::is_compilation_disabled_forever()) {
487 return nullptr;
488 }
489
490 AbstractCompiler* compiler = thread->compiler();
491 guarantee(compiler != nullptr, "Compiler object must exist");
492 compiler->on_empty_queue(this, thread);
493 if (_first != nullptr) {
494 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
495 // so check again whether any tasks were added to the queue.
496 break;
497 }
498
499 // If there are no compilation tasks and we can compile new jobs
500 // (i.e., there is enough free space in the code cache) there is
501 // no need to invoke the GC.
502 // We need a timed wait here, since compiler threads can exit if compilation
503 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
504 // is not critical and we do not want idle compiler threads to wake up too often.
505 locker.wait(5*1000);
506
507 transfer_pending(); // reacquired lock
508
509 if (RecompilationPolicy::have_recompilation_work()) return nullptr;
510
511 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
512 // Still nothing to compile. Give caller a chance to stop this thread.
513 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
514 }
515 }
516
517 if (CompileBroker::is_compilation_disabled_forever()) {
518 return nullptr;
519 }
520
521 CompileTask* task;
522 {
523 NoSafepointVerifier nsv;
524 task = CompilationPolicy::select_task(this, thread);
525 if (task != nullptr) {
526 task = task->select_for_compilation();
527 }
528 }
529
530 if (task != nullptr) {
531 // Save method pointers across unlock safepoint. The task is removed from
532 // the compilation queue, which is walked during RedefineClasses.
533 Thread* thread = Thread::current();
534 save_method = methodHandle(thread, task->method());
535 save_hot_method = methodHandle(thread, task->hot_method());
536
537 remove(task);
538 }
539 purge_stale_tasks(); // may temporarily release MCQ lock
540 return task;
541 }
542
543 // Clean & deallocate stale compile tasks.
544 // Temporarily releases MethodCompileQueue lock.
545 void CompileQueue::purge_stale_tasks() {
546 assert(_lock->owned_by_self(), "must own lock");
547 if (_first_stale != nullptr) {
548 // Stale tasks are purged when MCQ lock is released,
549 // but _first_stale updates are protected by MCQ lock.
550 // Once task processing starts and MCQ lock is released,
551 // other compiler threads can reuse _first_stale.
552 CompileTask* head = _first_stale;
553 _first_stale = nullptr;
554 {
555 MutexUnlocker ul(_lock);
556 for (CompileTask* task = head; task != nullptr; ) {
557 CompileTask* next_task = task->next();
558 CompileTaskWrapper ctw(task); // Frees the task
559 task->set_failure_reason("stale task");
560 task = next_task;
561 }
562 }
563 transfer_pending(); // transfer pending after reacquiring MCQ lock
564 }
565 }
566
567 void CompileQueue::remove(CompileTask* task) {
568 assert(_lock->owned_by_self(), "must own lock");
569 if (task->prev() != nullptr) {
570 task->prev()->set_next(task->next());
571 } else {
572 // max is the first element
573 assert(task == _first, "Sanity");
574 _first = task->next();
575 }
576
577 if (task->next() != nullptr) {
578 task->next()->set_prev(task->prev());
579 } else {
580 // max is the last element
581 assert(task == _last, "Sanity");
582 _last = task->prev();
583 }
584 --_size;
585 ++_total_removed;
586 }
587
588 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
589 assert(_lock->owned_by_self(), "must own lock");
590 remove(task);
591
592 // Enqueue the task for reclamation (should be done outside MCQ lock)
593 task->set_next(_first_stale);
594 task->set_prev(nullptr);
595 _first_stale = task;
596 }
597
598 // methods in the compile queue need to be marked as used on the stack
599 // so that they don't get reclaimed by Redefine Classes
600 void CompileQueue::mark_on_stack() {
601 for (CompileTask* task = _first; task != nullptr; task = task->next()) {
602 task->mark_on_stack();
603 }
604 for (CompileTask* task = _queue.first(); !_queue.is_end(task); task = task->next()) {
605 assert(task != nullptr, "");
606 task->mark_on_stack();
607 }
608 }
609
610
611 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_scc) {
612 if (is_c2_compile(comp_level)) return ((is_scc && (_sc_count > 0)) ? _sc2_compile_queue : _c2_compile_queue);
613 if (is_c1_compile(comp_level)) return ((is_scc && (_sc_count > 0)) ? _sc1_compile_queue : _c1_compile_queue);
614 return nullptr;
615 }
616
617 CompileQueue* CompileBroker::c1_compile_queue() {
618 return _c1_compile_queue;
619 }
620
621 CompileQueue* CompileBroker::c2_compile_queue() {
622 return _c2_compile_queue;
623 }
624
625 void CompileBroker::print_compile_queues(outputStream* st) {
626 st->print_cr("Current compiles: ");
627
628 char buf[2000];
629 int buflen = sizeof(buf);
630 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
631
632 st->cr();
633 if (_c1_compile_queue != nullptr) {
634 _c1_compile_queue->print(st);
635 }
636 if (_c2_compile_queue != nullptr) {
637 _c2_compile_queue->print(st);
638 }
639 if (_c3_compile_queue != nullptr) {
640 _c3_compile_queue->print(st);
641 }
642 if (_sc1_compile_queue != nullptr) {
643 _sc1_compile_queue->print(st);
644 }
645 if (_sc2_compile_queue != nullptr) {
646 _sc2_compile_queue->print(st);
647 }
648 }
649
650 void CompileQueue::print(outputStream* st) {
651 assert_locked_or_safepoint(_lock);
652 st->print_cr("%s:", name());
653 CompileTask* task = _first;
654 if (task == nullptr) {
655 st->print_cr("Empty");
656 } else {
657 while (task != nullptr) {
658 task->print(st, nullptr, true, true);
659 task = task->next();
660 }
661 }
662 st->cr();
663 }
664
665 void CompileQueue::print_tty() {
666 stringStream ss;
667 // Dump the compile queue into a buffer before locking the tty
668 print(&ss);
669 {
670 ttyLocker ttyl;
671 tty->print("%s", ss.freeze());
672 }
673 }
674
675 CompilerCounters::CompilerCounters() {
676 _current_method[0] = '\0';
677 _compile_type = CompileBroker::no_compile;
678 }
679
680 #if INCLUDE_JFR && COMPILER2_OR_JVMCI
681 // It appends new compiler phase names to growable array phase_names(a new CompilerPhaseType mapping
682 // in compiler/compilerEvent.cpp) and registers it with its serializer.
683 //
684 // c2 uses explicit CompilerPhaseType idToPhase mapping in opto/phasetype.hpp,
685 // so if c2 is used, it should be always registered first.
686 // This function is called during vm initialization.
687 static void register_jfr_phasetype_serializer(CompilerType compiler_type) {
688 ResourceMark rm;
689 static bool first_registration = true;
690 if (compiler_type == compiler_jvmci) {
691 CompilerEvent::PhaseEvent::get_phase_id("NOT_A_PHASE_NAME", false, false, false);
692 first_registration = false;
693 #ifdef COMPILER2
694 } else if (compiler_type == compiler_c2) {
695 assert(first_registration, "invariant"); // c2 must be registered first.
696 for (int i = 0; i < PHASE_NUM_TYPES; i++) {
697 const char* phase_name = CompilerPhaseTypeHelper::to_description((CompilerPhaseType) i);
698 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
699 }
700 first_registration = false;
701 #endif // COMPILER2
702 }
703 }
704 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
705
706 // ------------------------------------------------------------------
707 // CompileBroker::compilation_init
708 //
709 // Initialize the Compilation object
710 void CompileBroker::compilation_init(JavaThread* THREAD) {
711 // No need to initialize compilation system if we do not use it.
712 if (!UseCompiler) {
713 return;
714 }
715 // Set the interface to the current compiler(s).
716 _c1_count = CompilationPolicy::c1_count();
717 _c2_count = CompilationPolicy::c2_count();
718 _c3_count = CompilationPolicy::c3_count();
719 _sc_count = CompilationPolicy::sc_count();
720
721 #if INCLUDE_JVMCI
722 if (EnableJVMCI) {
723 // This is creating a JVMCICompiler singleton.
724 JVMCICompiler* jvmci = new JVMCICompiler();
725
726 if (UseJVMCICompiler) {
727 _compilers[1] = jvmci;
728 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
729 if (BootstrapJVMCI) {
730 // JVMCI will bootstrap so give it more threads
731 _c2_count = MIN2(32, os::active_processor_count());
732 }
733 } else {
734 _c2_count = JVMCIThreads;
735 }
736 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
737 } else {
738 #ifdef COMPILER1
739 _c1_count = JVMCIHostThreads;
740 #endif // COMPILER1
741 }
742 #ifdef COMPILER2
743 if (SCCache::is_on() && (_c3_count > 0)) {
744 _compilers[2] = new C2Compiler();
745 }
746 #endif
747 }
748 }
749 #endif // INCLUDE_JVMCI
750
751 #ifdef COMPILER1
752 if (_c1_count > 0) {
753 _compilers[0] = new Compiler();
754 }
755 #endif // COMPILER1
756
757 #ifdef COMPILER2
758 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
759 if (_c2_count > 0) {
760 _compilers[1] = new C2Compiler();
761 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
762 // idToPhase mapping for c2 is in opto/phasetype.hpp
763 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
764 }
765 }
766 #endif // COMPILER2
767
768 #if INCLUDE_JVMCI
769 // Register after c2 registration.
770 // JVMCI CompilerPhaseType idToPhase mapping is dynamic.
771 if (EnableJVMCI) {
772 JFR_ONLY(register_jfr_phasetype_serializer(compiler_jvmci);)
773 }
774 #endif // INCLUDE_JVMCI
775
776 if (CompilerOracle::should_collect_memstat()) {
777 CompilationMemoryStatistic::initialize();
778 }
779
780 // Start the compiler thread(s)
781 init_compiler_threads();
782 // totalTime performance counter is always created as it is required
783 // by the implementation of java.lang.management.CompilationMXBean.
784 {
785 // Ensure OOM leads to vm_exit_during_initialization.
786 EXCEPTION_MARK;
787 _perf_total_compilation =
788 PerfDataManager::create_counter(JAVA_CI, "totalTime",
789 PerfData::U_Ticks, CHECK);
790 }
791
792 if (UsePerfData) {
793
794 EXCEPTION_MARK;
795
796 // create the jvmstat performance counters
797 _perf_osr_compilation =
798 PerfDataManager::create_counter(SUN_CI, "osrTime",
799 PerfData::U_Ticks, CHECK);
800
801 _perf_standard_compilation =
802 PerfDataManager::create_counter(SUN_CI, "standardTime",
803 PerfData::U_Ticks, CHECK);
804
805 _perf_total_bailout_count =
806 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
807 PerfData::U_Events, CHECK);
808
809 _perf_total_invalidated_count =
810 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
811 PerfData::U_Events, CHECK);
812
813 _perf_total_compile_count =
814 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
815 PerfData::U_Events, CHECK);
816 _perf_total_osr_compile_count =
817 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
818 PerfData::U_Events, CHECK);
819
820 _perf_total_standard_compile_count =
821 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
822 PerfData::U_Events, CHECK);
823
824 _perf_sum_osr_bytes_compiled =
825 PerfDataManager::create_counter(SUN_CI, "osrBytes",
826 PerfData::U_Bytes, CHECK);
827
828 _perf_sum_standard_bytes_compiled =
829 PerfDataManager::create_counter(SUN_CI, "standardBytes",
830 PerfData::U_Bytes, CHECK);
831
832 _perf_sum_nmethod_size =
833 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
834 PerfData::U_Bytes, CHECK);
835
836 _perf_sum_nmethod_code_size =
837 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
838 PerfData::U_Bytes, CHECK);
839
840 _perf_last_method =
841 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
842 CompilerCounters::cmname_buffer_length,
843 "", CHECK);
844
845 _perf_last_failed_method =
846 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
847 CompilerCounters::cmname_buffer_length,
848 "", CHECK);
849
850 _perf_last_invalidated_method =
851 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
852 CompilerCounters::cmname_buffer_length,
853 "", CHECK);
854
855 _perf_last_compile_type =
856 PerfDataManager::create_variable(SUN_CI, "lastType",
857 PerfData::U_None,
858 (jlong)CompileBroker::no_compile,
859 CHECK);
860
861 _perf_last_compile_size =
862 PerfDataManager::create_variable(SUN_CI, "lastSize",
863 PerfData::U_Bytes,
864 (jlong)CompileBroker::no_compile,
865 CHECK);
866
867
868 _perf_last_failed_type =
869 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
870 PerfData::U_None,
871 (jlong)CompileBroker::no_compile,
872 CHECK);
873
874 _perf_last_invalidated_type =
875 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
876 PerfData::U_None,
877 (jlong)CompileBroker::no_compile,
878 CHECK);
879 }
880
881 log_info(scc, init)("CompileBroker is initialized");
882 _initialized = true;
883 }
884
885 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
886 Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
887 return thread_oop;
888 }
889
890 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
891 CompilationPolicy::replay_training_at_init_loop(thread);
892 }
893
894 #if defined(ASSERT) && COMPILER2_OR_JVMCI
895 // Stress testing. Dedicated threads revert optimizations based on escape analysis concurrently to
896 // the running java application. Configured with vm options DeoptimizeObjectsALot*.
897 class DeoptimizeObjectsALotThread : public JavaThread {
898
899 static void deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS);
900 void deoptimize_objects_alot_loop_single();
901 void deoptimize_objects_alot_loop_all();
902
903 public:
904 DeoptimizeObjectsALotThread() : JavaThread(&deopt_objs_alot_thread_entry) { }
905
906 bool is_hidden_from_external_view() const { return true; }
907 };
908
909 // Entry for DeoptimizeObjectsALotThread. The threads are started in
910 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
911 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
912 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
913 bool enter_single_loop;
914 {
915 MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
916 static int single_thread_count = 0;
917 enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
918 }
919 if (enter_single_loop) {
920 dt->deoptimize_objects_alot_loop_single();
921 } else {
922 dt->deoptimize_objects_alot_loop_all();
923 }
924 }
925
926 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
927 // barrier targets a single thread which is selected round robin.
928 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_single() {
929 HandleMark hm(this);
930 while (true) {
931 for (JavaThreadIteratorWithHandle jtiwh; JavaThread *deoptee_thread = jtiwh.next(); ) {
932 { // Begin new scope for escape barrier
933 HandleMarkCleaner hmc(this);
934 ResourceMark rm(this);
935 EscapeBarrier eb(true, this, deoptee_thread);
936 eb.deoptimize_objects(100);
937 }
938 // Now sleep after the escape barriers destructor resumed deoptee_thread.
939 sleep(DeoptimizeObjectsALotInterval);
940 }
941 }
942 }
943
944 // Execute EscapeBarriers in an endless loop to revert optimizations based on escape analysis. Each
945 // barrier targets all java threads in the vm at once.
946 void DeoptimizeObjectsALotThread::deoptimize_objects_alot_loop_all() {
947 HandleMark hm(this);
948 while (true) {
949 { // Begin new scope for escape barrier
950 HandleMarkCleaner hmc(this);
951 ResourceMark rm(this);
952 EscapeBarrier eb(true, this);
953 eb.deoptimize_objects_all_threads();
954 }
955 // Now sleep after the escape barriers destructor resumed the java threads.
956 sleep(DeoptimizeObjectsALotInterval);
957 }
958 }
959 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
960
961
962 JavaThread* CompileBroker::make_thread(ThreadType type, jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, JavaThread* THREAD) {
963 Handle thread_oop(THREAD, JNIHandles::resolve_non_null(thread_handle));
964
965 if (java_lang_Thread::thread(thread_oop()) != nullptr) {
966 assert(type == compiler_t, "should only happen with reused compiler threads");
967 // The compiler thread hasn't actually exited yet so don't try to reuse it
968 return nullptr;
969 }
970
971 JavaThread* new_thread = nullptr;
972 switch (type) {
973 case compiler_t:
974 assert(comp != nullptr, "Compiler instance missing.");
975 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
976 CompilerCounters* counters = new CompilerCounters();
977 new_thread = new CompilerThread(queue, counters);
978 }
979 break;
980 #if defined(ASSERT) && COMPILER2_OR_JVMCI
981 case deoptimizer_t:
982 new_thread = new DeoptimizeObjectsALotThread();
983 break;
984 #endif // ASSERT
985 case training_replay_t:
986 new_thread = new TrainingReplayThread();
987 break;
988 default:
989 ShouldNotReachHere();
990 }
991
992 // At this point the new CompilerThread data-races with this startup
993 // thread (which is the main thread and NOT the VM thread).
994 // This means Java bytecodes being executed at startup can
995 // queue compile jobs which will run at whatever default priority the
996 // newly created CompilerThread runs at.
997
998
999 // At this point it may be possible that no osthread was created for the
1000 // JavaThread due to lack of resources. We will handle that failure below.
1001 // Also check new_thread so that static analysis is happy.
1002 if (new_thread != nullptr && new_thread->osthread() != nullptr) {
1003
1004 if (type == compiler_t) {
1005 CompilerThread::cast(new_thread)->set_compiler(comp);
1006 }
1007
1008 // Note that we cannot call os::set_priority because it expects Java
1009 // priorities and we are *explicitly* using OS priorities so that it's
1010 // possible to set the compiler thread priority higher than any Java
1011 // thread.
1012
1013 int native_prio = CompilerThreadPriority;
1014 if (native_prio == -1) {
1015 if (UseCriticalCompilerThreadPriority) {
1016 native_prio = os::java_to_os_priority[CriticalPriority];
1017 } else {
1018 native_prio = os::java_to_os_priority[NearMaxPriority];
1019 }
1020 }
1021 os::set_native_priority(new_thread, native_prio);
1022
1023 // Note that this only sets the JavaThread _priority field, which by
1024 // definition is limited to Java priorities and not OS priorities.
1025 JavaThread::start_internal_daemon(THREAD, new_thread, thread_oop, NearMaxPriority);
1026
1027 } else { // osthread initialization failure
1028 if (UseDynamicNumberOfCompilerThreads && type == compiler_t
1029 && comp->num_compiler_threads() > 0) {
1030 // The new thread is not known to Thread-SMR yet so we can just delete.
1031 delete new_thread;
1032 return nullptr;
1033 } else {
1034 vm_exit_during_initialization("java.lang.OutOfMemoryError",
1035 os::native_thread_creation_failed_msg());
1036 }
1037 }
1038
1039 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
1040
1041 return new_thread;
1042 }
1043
1044 static bool trace_compiler_threads() {
1045 LogTarget(Debug, jit, thread) lt;
1046 return TraceCompilerThreads || lt.is_enabled();
1047 }
1048
1049 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1050 char name_buffer[256];
1051 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1052 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1053 return JNIHandles::make_global(thread_oop);
1054 }
1055
1056 static void print_compiler_threads(stringStream& msg) {
1057 if (TraceCompilerThreads) {
1058 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1059 }
1060 LogTarget(Debug, jit, thread) lt;
1061 if (lt.is_enabled()) {
1062 LogStream ls(lt);
1063 ls.print_cr("%s", msg.as_string());
1064 }
1065 }
1066
1067 static void print_compiler_thread(JavaThread *ct) {
1068 if (trace_compiler_threads()) {
1069 ResourceMark rm;
1070 ThreadsListHandle tlh; // name() depends on the TLH.
1071 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1072 stringStream msg;
1073 msg.print("Added initial compiler thread %s", ct->name());
1074 print_compiler_threads(msg);
1075 }
1076 }
1077
1078 void CompileBroker::init_compiler_threads() {
1079 // Ensure any exceptions lead to vm_exit_during_initialization.
1080 EXCEPTION_MARK;
1081 #if !defined(ZERO)
1082 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1083 #endif // !ZERO
1084 // Initialize the compilation queue
1085 if (_c2_count > 0) {
1086 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1087 _c2_compile_queue = new CompileQueue(name, MethodCompileQueueC2_lock);
1088 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1089 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1090 }
1091 if (_c1_count > 0) {
1092 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1093 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1094 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1095 }
1096
1097 if (_c3_count > 0) {
1098 const char* name = "C2 compile queue";
1099 _c3_compile_queue = new CompileQueue(name, MethodCompileQueueC3_lock);
1100 _compiler3_objects = NEW_C_HEAP_ARRAY(jobject, _c3_count, mtCompiler);
1101 _compiler3_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c3_count, mtCompiler);
1102 }
1103 if (_sc_count > 0) {
1104 if (_c1_count > 0) { // C1 is present
1105 _sc1_compile_queue = new CompileQueue("C1 SC compile queue", MethodCompileQueueSC1_lock);
1106 }
1107 if (_c2_count > 0) { // C2 is present
1108 _sc2_compile_queue = new CompileQueue("C2 SC compile queue", MethodCompileQueueSC2_lock);
1109 }
1110 _sc_objects = NEW_C_HEAP_ARRAY(jobject, _sc_count, mtCompiler);
1111 _sc_logs = NEW_C_HEAP_ARRAY(CompileLog*, _sc_count, mtCompiler);
1112 }
1113 char name_buffer[256];
1114
1115 for (int i = 0; i < _c2_count; i++) {
1116 // Create a name for our thread.
1117 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1118 _compiler2_objects[i] = thread_handle;
1119 _compiler2_logs[i] = nullptr;
1120
1121 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1122 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1123 assert(ct != nullptr, "should have been handled for initial thread");
1124 _compilers[1]->set_num_compiler_threads(i + 1);
1125 print_compiler_thread(ct);
1126 }
1127 }
1128
1129 for (int i = 0; i < _c1_count; i++) {
1130 // Create a name for our thread.
1131 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1132 _compiler1_objects[i] = thread_handle;
1133 _compiler1_logs[i] = nullptr;
1134
1135 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1136 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1137 assert(ct != nullptr, "should have been handled for initial thread");
1138 _compilers[0]->set_num_compiler_threads(i + 1);
1139 print_compiler_thread(ct);
1140 }
1141 }
1142
1143 for (int i = 0; i < _c3_count; i++) {
1144 // Create a name for our thread.
1145 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C2 CompilerThread%d", i);
1146 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1147 jobject thread_handle = JNIHandles::make_global(thread_oop);
1148 _compiler3_objects[i] = thread_handle;
1149 _compiler3_logs[i] = nullptr;
1150
1151 JavaThread *ct = make_thread(compiler_t, thread_handle, _c3_compile_queue, _compilers[2], THREAD);
1152 assert(ct != nullptr, "should have been handled for initial thread");
1153 _compilers[2]->set_num_compiler_threads(i + 1);
1154 print_compiler_thread(ct);
1155 }
1156
1157 if (_sc_count > 0) {
1158 int i = 0;
1159 if (_c1_count > 0) { // C1 is present
1160 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 1);
1161 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1162 jobject thread_handle = JNIHandles::make_global(thread_oop);
1163 _sc_objects[i] = thread_handle;
1164 _sc_logs[i] = nullptr;
1165 i++;
1166
1167 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc1_compile_queue, _compilers[0], THREAD);
1168 assert(ct != nullptr, "should have been handled for initial thread");
1169 print_compiler_thread(ct);
1170 }
1171 if (_c2_count > 0) { // C2 is present
1172 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 2);
1173 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1174 jobject thread_handle = JNIHandles::make_global(thread_oop);
1175 _sc_objects[i] = thread_handle;
1176 _sc_logs[i] = nullptr;
1177
1178 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc2_compile_queue, _compilers[1], THREAD);
1179 assert(ct != nullptr, "should have been handled for initial thread");
1180 print_compiler_thread(ct);
1181 }
1182 }
1183
1184 if (UsePerfData) {
1185 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count + _c3_count, CHECK);
1186 }
1187
1188 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1189 if (DeoptimizeObjectsALot) {
1190 // Initialize and start the object deoptimizer threads
1191 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1192 for (int count = 0; count < total_count; count++) {
1193 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1194 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1195 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1196 }
1197 }
1198 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1199 }
1200
1201 void CompileBroker::init_training_replay() {
1202 // Ensure any exceptions lead to vm_exit_during_initialization.
1203 EXCEPTION_MARK;
1204 if (TrainingData::have_data()) {
1205 if (UseConcurrentTrainingReplay) {
1206 Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1207 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1208 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1209 }
1210 _replay_initialized = true;
1211 }
1212 }
1213
1214 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1215
1216 int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1217 const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1218
1219 // Quick check if we already have enough compiler threads without taking the lock.
1220 // Numbers may change concurrently, so we read them again after we have the lock.
1221 if (_c2_compile_queue != nullptr) {
1222 old_c2_count = get_c2_thread_count();
1223 new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1224 }
1225 if (_c1_compile_queue != nullptr) {
1226 old_c1_count = get_c1_thread_count();
1227 new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1228 }
1229 if (new_c2_count <= old_c2_count && new_c1_count <= old_c1_count) return;
1230
1231 // Now, we do the more expensive operations.
1232 julong free_memory = os::free_memory();
1233 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
1234 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
1235 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
1236
1237 // Only attempt to start additional threads if the lock is free.
1238 if (!CompileThread_lock->try_lock()) return;
1239
1240 if (_c2_compile_queue != nullptr) {
1241 old_c2_count = get_c2_thread_count();
1242 new_c2_count = MIN4(_c2_count,
1243 _c2_compile_queue->size() / c2_tasks_per_thread,
1244 (int)(free_memory / (200*M)),
1245 (int)(available_cc_np / (128*K)));
1246
1247 for (int i = old_c2_count; i < new_c2_count; i++) {
1248 #if INCLUDE_JVMCI
1249 if (UseJVMCICompiler && !UseJVMCINativeLibrary && _compiler2_objects[i] == nullptr) {
1250 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread objects as their
1251 // existence is completely hidden from the rest of the VM (and those compiler threads can't
1252 // call Java code to do the creation anyway).
1253 //
1254 // For pure Java JVMCI we have to create new j.l.Thread objects as they are visible and we
1255 // can see unexpected thread lifecycle transitions if we bind them to new JavaThreads. For
1256 // native library JVMCI it's preferred to use the C1/C2 strategy as this avoids unnecessary
1257 // coupling with Java.
1258 if (!THREAD->can_call_java()) break;
1259 char name_buffer[256];
1260 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", _compilers[1]->name(), i);
1261 Handle thread_oop;
1262 {
1263 // We have to give up the lock temporarily for the Java calls.
1264 MutexUnlocker mu(CompileThread_lock);
1265 thread_oop = JavaThread::create_system_thread_object(name_buffer, THREAD);
1266 }
1267 if (HAS_PENDING_EXCEPTION) {
1268 if (trace_compiler_threads()) {
1269 ResourceMark rm;
1270 stringStream msg;
1271 msg.print_cr("JVMCI compiler thread creation failed:");
1272 PENDING_EXCEPTION->print_on(&msg);
1273 print_compiler_threads(msg);
1274 }
1275 CLEAR_PENDING_EXCEPTION;
1276 break;
1277 }
1278 // Check if another thread has beaten us during the Java calls.
1279 if (get_c2_thread_count() != i) break;
1280 jobject thread_handle = JNIHandles::make_global(thread_oop);
1281 assert(compiler2_object(i) == nullptr, "Old one must be released!");
1282 _compiler2_objects[i] = thread_handle;
1283 }
1284 #endif
1285 guarantee(compiler2_object(i) != nullptr, "Thread oop must exist");
1286 JavaThread *ct = make_thread(compiler_t, compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD);
1287 if (ct == nullptr) break;
1288 _compilers[1]->set_num_compiler_threads(i + 1);
1289 if (trace_compiler_threads()) {
1290 ResourceMark rm;
1291 ThreadsListHandle tlh; // name() depends on the TLH.
1292 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1293 stringStream msg;
1294 msg.print("Added compiler thread %s (free memory: %dMB, available non-profiled code cache: %dMB)",
1295 ct->name(), (int)(free_memory/M), (int)(available_cc_np/M));
1296 print_compiler_threads(msg);
1297 }
1298 }
1299 }
1300
1301 if (_c1_compile_queue != nullptr) {
1302 old_c1_count = get_c1_thread_count();
1303 new_c1_count = MIN4(_c1_count,
1304 _c1_compile_queue->size() / c1_tasks_per_thread,
1305 (int)(free_memory / (100*M)),
1306 (int)(available_cc_p / (128*K)));
1307
1308 for (int i = old_c1_count; i < new_c1_count; i++) {
1309 JavaThread *ct = make_thread(compiler_t, compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD);
1310 if (ct == nullptr) break;
1311 _compilers[0]->set_num_compiler_threads(i + 1);
1312 if (trace_compiler_threads()) {
1313 ResourceMark rm;
1314 ThreadsListHandle tlh; // name() depends on the TLH.
1315 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1316 stringStream msg;
1317 msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1318 ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1319 print_compiler_threads(msg);
1320 }
1321 }
1322 }
1323
1324 CompileThread_lock->unlock();
1325 }
1326
1327
1328 /**
1329 * Set the methods on the stack as on_stack so that redefine classes doesn't
1330 * reclaim them. This method is executed at a safepoint.
1331 */
1332 void CompileBroker::mark_on_stack() {
1333 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1334 // Since we are at a safepoint, we do not need a lock to access
1335 // the compile queues.
1336 if (_c3_compile_queue != nullptr) {
1337 _c3_compile_queue->mark_on_stack();
1338 }
1339 if (_c2_compile_queue != nullptr) {
1340 _c2_compile_queue->mark_on_stack();
1341 }
1342 if (_c1_compile_queue != nullptr) {
1343 _c1_compile_queue->mark_on_stack();
1344 }
1345 if (_sc1_compile_queue != nullptr) {
1346 _sc1_compile_queue->mark_on_stack();
1347 }
1348 if (_sc2_compile_queue != nullptr) {
1349 _sc2_compile_queue->mark_on_stack();
1350 }
1351 }
1352
1353 // ------------------------------------------------------------------
1354 // CompileBroker::compile_method
1355 //
1356 // Request compilation of a method.
1357 void CompileBroker::compile_method_base(const methodHandle& method,
1358 int osr_bci,
1359 int comp_level,
1360 const methodHandle& hot_method,
1361 int hot_count,
1362 CompileTask::CompileReason compile_reason,
1363 bool requires_online_compilation,
1364 bool blocking,
1365 Thread* thread) {
1366 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1367 assert(method->method_holder()->is_instance_klass(),
1368 "sanity check");
1369 assert(!method->method_holder()->is_not_initialized() ||
1370 compile_reason == CompileTask::Reason_Preload ||
1371 compile_reason == CompileTask::Reason_Precompile ||
1372 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1373 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1374
1375 if (CIPrintRequests) {
1376 tty->print("request: ");
1377 method->print_short_name(tty);
1378 if (osr_bci != InvocationEntryBci) {
1379 tty->print(" osr_bci: %d", osr_bci);
1380 }
1381 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1382 if (!hot_method.is_null()) {
1383 tty->print(" hot: ");
1384 if (hot_method() != method()) {
1385 hot_method->print_short_name(tty);
1386 } else {
1387 tty->print("yes");
1388 }
1389 }
1390 tty->cr();
1391 }
1392
1393 // A request has been made for compilation. Before we do any
1394 // real work, check to see if the method has been compiled
1395 // in the meantime with a definitive result.
1396 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1397 return;
1398 }
1399
1400 #ifndef PRODUCT
1401 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1402 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1403 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1404 return;
1405 }
1406 }
1407 #endif
1408
1409 // If this method is already in the compile queue, then
1410 // we do not block the current thread.
1411 if (compilation_is_in_queue(method)) {
1412 // We may want to decay our counter a bit here to prevent
1413 // multiple denied requests for compilation. This is an
1414 // open compilation policy issue. Note: The other possibility,
1415 // in the case that this is a blocking compile request, is to have
1416 // all subsequent blocking requesters wait for completion of
1417 // ongoing compiles. Note that in this case we'll need a protocol
1418 // for freeing the associated compile tasks. [Or we could have
1419 // a single static monitor on which all these waiters sleep.]
1420 return;
1421 }
1422
1423 // Tiered policy requires MethodCounters to exist before adding a method to
1424 // the queue. Create if we don't have them yet.
1425 if (compile_reason != CompileTask::Reason_Preload) {
1426 method->get_method_counters(thread);
1427 }
1428
1429 SCCEntry* scc_entry = find_scc_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1430 bool is_scc = (scc_entry != nullptr);
1431
1432 // Outputs from the following MutexLocker block:
1433 CompileTask* task = nullptr;
1434 CompileQueue* queue;
1435 #if INCLUDE_JVMCI
1436 if (is_c2_compile(comp_level) && compiler2()->is_jvmci() && compiler3() != nullptr &&
1437 ((JVMCICompiler*)compiler2())->force_comp_at_level_simple(method)) {
1438 assert(_c3_compile_queue != nullptr, "sanity");
1439 queue = _c3_compile_queue; // JVMCI compiler's methods compilation
1440 } else
1441 #endif
1442 queue = compile_queue(comp_level, is_scc);
1443
1444 // Acquire our lock.
1445 {
1446 ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1447
1448 // Make sure the method has not slipped into the queues since
1449 // last we checked; note that those checks were "fast bail-outs".
1450 // Here we need to be more careful, see 14012000 below.
1451 if (compilation_is_in_queue(method)) {
1452 return;
1453 }
1454
1455 // We need to check again to see if the compilation has
1456 // completed. A previous compilation may have registered
1457 // some result.
1458 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1459 return;
1460 }
1461
1462 // We now know that this compilation is not pending, complete,
1463 // or prohibited. Assign a compile_id to this compilation
1464 // and check to see if it is in our [Start..Stop) range.
1465 int compile_id = assign_compile_id(method, osr_bci);
1466 if (compile_id == 0) {
1467 // The compilation falls outside the allowed range.
1468 return;
1469 }
1470
1471 #if INCLUDE_JVMCI
1472 if (UseJVMCICompiler && blocking) {
1473 // Don't allow blocking compiles for requests triggered by JVMCI.
1474 if (thread->is_Compiler_thread()) {
1475 blocking = false;
1476 }
1477
1478 // In libjvmci, JVMCI initialization should not deadlock with other threads
1479 if (!UseJVMCINativeLibrary) {
1480 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1481 vframeStream vfst(JavaThread::cast(thread));
1482 for (; !vfst.at_end(); vfst.next()) {
1483 if (vfst.method()->is_static_initializer() ||
1484 (vfst.method()->method_holder()->is_subclass_of(vmClasses::ClassLoader_klass()) &&
1485 vfst.method()->name() == vmSymbols::loadClass_name())) {
1486 blocking = false;
1487 break;
1488 }
1489 }
1490
1491 // Don't allow blocking compilation requests to JVMCI
1492 // if JVMCI itself is not yet initialized
1493 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1494 blocking = false;
1495 }
1496 }
1497
1498 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1499 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1500 // such as the DestroyJavaVM thread.
1501 if (JVMCI::in_shutdown()) {
1502 blocking = false;
1503 }
1504 }
1505 #endif // INCLUDE_JVMCI
1506
1507 // We will enter the compilation in the queue.
1508 // 14012000: Note that this sets the queued_for_compile bits in
1509 // the target method. We can now reason that a method cannot be
1510 // queued for compilation more than once, as follows:
1511 // Before a thread queues a task for compilation, it first acquires
1512 // the compile queue lock, then checks if the method's queued bits
1513 // are set or it has already been compiled. Thus there can not be two
1514 // instances of a compilation task for the same method on the
1515 // compilation queue. Consider now the case where the compilation
1516 // thread has already removed a task for that method from the queue
1517 // and is in the midst of compiling it. In this case, the
1518 // queued_for_compile bits must be set in the method (and these
1519 // will be visible to the current thread, since the bits were set
1520 // under protection of the compile queue lock, which we hold now.
1521 // When the compilation completes, the compiler thread first sets
1522 // the compilation result and then clears the queued_for_compile
1523 // bits. Neither of these actions are protected by a barrier (or done
1524 // under the protection of a lock), so the only guarantee we have
1525 // (on machines with TSO (Total Store Order)) is that these values
1526 // will update in that order. As a result, the only combinations of
1527 // these bits that the current thread will see are, in temporal order:
1528 // <RESULT, QUEUE> :
1529 // <0, 1> : in compile queue, but not yet compiled
1530 // <1, 1> : compiled but queue bit not cleared
1531 // <1, 0> : compiled and queue bit cleared
1532 // Because we first check the queue bits then check the result bits,
1533 // we are assured that we cannot introduce a duplicate task.
1534 // Note that if we did the tests in the reverse order (i.e. check
1535 // result then check queued bit), we could get the result bit before
1536 // the compilation completed, and the queue bit after the compilation
1537 // completed, and end up introducing a "duplicate" (redundant) task.
1538 // In that case, the compiler thread should first check if a method
1539 // has already been compiled before trying to compile it.
1540 // NOTE: in the event that there are multiple compiler threads and
1541 // there is de-optimization/recompilation, things will get hairy,
1542 // and in that case it's best to protect both the testing (here) of
1543 // these bits, and their updating (here and elsewhere) under a
1544 // common lock.
1545 task = create_compile_task(queue,
1546 compile_id, method,
1547 osr_bci, comp_level,
1548 hot_method, hot_count, scc_entry, compile_reason,
1549 requires_online_compilation, blocking);
1550
1551 if (task->is_scc() && (_sc_count > 0)) {
1552 // Put it on SC queue
1553 queue = is_c1_compile(comp_level) ? _sc1_compile_queue : _sc2_compile_queue;
1554 }
1555
1556 if (UseLockFreeCompileQueues) {
1557 assert(queue->lock()->owned_by_self() == false, "");
1558 queue->add_pending(task);
1559 } else {
1560 queue->add(task);
1561 }
1562 }
1563
1564 if (blocking) {
1565 wait_for_completion(task);
1566 }
1567 }
1568
1569 SCCEntry* CompileBroker::find_scc_entry(const methodHandle& method, int osr_bci, int comp_level,
1570 CompileTask::CompileReason compile_reason,
1571 bool requires_online_compilation) {
1572 SCCEntry* scc_entry = nullptr;
1573 if (osr_bci == InvocationEntryBci && !requires_online_compilation && SCCache::is_on_for_read()) {
1574 // Check for cached code.
1575 if (compile_reason == CompileTask::Reason_Preload) {
1576 scc_entry = method->scc_entry();
1577 assert(scc_entry != nullptr && scc_entry->for_preload(), "sanity");
1578 } else {
1579 scc_entry = SCCache::find_code_entry(method, comp_level);
1580 }
1581 }
1582 return scc_entry;
1583 }
1584
1585 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1586 int comp_level,
1587 const methodHandle& hot_method, int hot_count,
1588 bool requires_online_compilation,
1589 CompileTask::CompileReason compile_reason,
1590 TRAPS) {
1591 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1592 if (!_initialized || comp_level == CompLevel_none) {
1593 return nullptr;
1594 }
1595
1596 #if INCLUDE_JVMCI
1597 if (EnableJVMCI && UseJVMCICompiler &&
1598 comp_level == CompLevel_full_optimization && !AOTLinkedClassBulkLoader::class_preloading_finished()) {
1599 return nullptr;
1600 }
1601 #endif
1602
1603 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1604 assert(comp != nullptr, "Ensure we have a compiler");
1605
1606 #if INCLUDE_JVMCI
1607 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1608 // JVMCI compilation is not yet initializable.
1609 return nullptr;
1610 }
1611 #endif
1612
1613 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1614 // CompileBroker::compile_method can trap and can have pending async exception.
1615 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1616 DirectivesStack::release(directive);
1617 return nm;
1618 }
1619
1620 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1621 int comp_level,
1622 const methodHandle& hot_method, int hot_count,
1623 bool requires_online_compilation,
1624 CompileTask::CompileReason compile_reason,
1625 DirectiveSet* directive,
1626 TRAPS) {
1627
1628 // make sure arguments make sense
1629 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1630 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1631 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1632 assert(!method->method_holder()->is_not_initialized() ||
1633 compile_reason == CompileTask::Reason_Preload ||
1634 compile_reason == CompileTask::Reason_Precompile ||
1635 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1636 // return quickly if possible
1637
1638 if (PrecompileOnlyAndExit && !CompileTask::reason_is_precompiled(compile_reason)) {
1639 return nullptr;
1640 }
1641
1642 // lock, make sure that the compilation
1643 // isn't prohibited in a straightforward way.
1644 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1645 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1646 return nullptr;
1647 }
1648
1649 if (osr_bci == InvocationEntryBci) {
1650 // standard compilation
1651 nmethod* method_code = method->code();
1652 if (method_code != nullptr) {
1653 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1654 return method_code;
1655 }
1656 }
1657 if (method->is_not_compilable(comp_level)) {
1658 return nullptr;
1659 }
1660 } else {
1661 // osr compilation
1662 // We accept a higher level osr method
1663 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1664 if (nm != nullptr) return nm;
1665 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1666 }
1667
1668 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1669 // some prerequisites that are compiler specific
1670 if (compile_reason != CompileTask::Reason_Preload && (comp->is_c2() || comp->is_jvmci())) {
1671 InternalOOMEMark iom(THREAD);
1672 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1673 // Resolve all classes seen in the signature of the method
1674 // we are compiling.
1675 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1676 }
1677
1678 // If the method is native, do the lookup in the thread requesting
1679 // the compilation. Native lookups can load code, which is not
1680 // permitted during compilation.
1681 //
1682 // Note: A native method implies non-osr compilation which is
1683 // checked with an assertion at the entry of this method.
1684 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1685 address adr = NativeLookup::lookup(method, THREAD);
1686 if (HAS_PENDING_EXCEPTION) {
1687 // In case of an exception looking up the method, we just forget
1688 // about it. The interpreter will kick-in and throw the exception.
1689 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1690 CLEAR_PENDING_EXCEPTION;
1691 return nullptr;
1692 }
1693 assert(method->has_native_function(), "must have native code by now");
1694 }
1695
1696 // RedefineClasses() has replaced this method; just return
1697 if (method->is_old()) {
1698 return nullptr;
1699 }
1700
1701 // JVMTI -- post_compile_event requires jmethod_id() that may require
1702 // a lock the compiling thread can not acquire. Prefetch it here.
1703 if (JvmtiExport::should_post_compiled_method_load()) {
1704 method->jmethod_id();
1705 }
1706
1707 // do the compilation
1708 if (method->is_native()) {
1709 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1710 #if defined(X86) && !defined(ZERO)
1711 // The following native methods:
1712 //
1713 // java.lang.Float.intBitsToFloat
1714 // java.lang.Float.floatToRawIntBits
1715 // java.lang.Double.longBitsToDouble
1716 // java.lang.Double.doubleToRawLongBits
1717 //
1718 // are called through the interpreter even if interpreter native stubs
1719 // are not preferred (i.e., calling through adapter handlers is preferred).
1720 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1721 // if the version of the methods from the native libraries is called.
1722 // As the interpreter and the C2-intrinsified version of the methods preserves
1723 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1724 if ((UseSSE >= 1 &&
1725 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1726 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1727 (UseSSE >= 2 &&
1728 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1729 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1730 return nullptr;
1731 }
1732 #endif // X86 && !ZERO
1733
1734 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1735 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1736 //
1737 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1738 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1739 AdapterHandlerLibrary::create_native_wrapper(method);
1740 } else {
1741 return nullptr;
1742 }
1743 } else {
1744 // If the compiler is shut off due to code cache getting full
1745 // fail out now so blocking compiles dont hang the java thread
1746 if (!should_compile_new_jobs()) {
1747 return nullptr;
1748 }
1749 bool is_blocking = ReplayCompiles ||
1750 !directive->BackgroundCompilationOption ||
1751 (compile_reason == CompileTask::Reason_Precompile) ||
1752 (compile_reason == CompileTask::Reason_PrecompileForPreload);
1753 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1754 }
1755
1756 // return requested nmethod
1757 // We accept a higher level osr method
1758 if (osr_bci == InvocationEntryBci) {
1759 return method->code();
1760 }
1761 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1762 }
1763
1764
1765 // ------------------------------------------------------------------
1766 // CompileBroker::compilation_is_complete
1767 //
1768 // See if compilation of this method is already complete.
1769 bool CompileBroker::compilation_is_complete(Method* method,
1770 int osr_bci,
1771 int comp_level,
1772 bool online_only,
1773 CompileTask::CompileReason compile_reason) {
1774 if (compile_reason == CompileTask::Reason_Precompile ||
1775 compile_reason == CompileTask::Reason_PrecompileForPreload) {
1776 return false; // FIXME: any restrictions?
1777 }
1778 bool is_osr = (osr_bci != standard_entry_bci);
1779 if (is_osr) {
1780 if (method->is_not_osr_compilable(comp_level)) {
1781 return true;
1782 } else {
1783 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1784 return (result != nullptr);
1785 }
1786 } else {
1787 if (method->is_not_compilable(comp_level)) {
1788 return true;
1789 } else {
1790 nmethod* result = method->code();
1791 if (result == nullptr) {
1792 return false;
1793 }
1794 if (online_only && result->is_scc()) {
1795 return false;
1796 }
1797 bool same_level = (comp_level == result->comp_level());
1798 if (result->has_clinit_barriers()) {
1799 return !same_level; // Allow replace preloaded code with new code of the same level
1800 }
1801 return same_level;
1802 }
1803 }
1804 }
1805
1806
1807 /**
1808 * See if this compilation is already requested.
1809 *
1810 * Implementation note: there is only a single "is in queue" bit
1811 * for each method. This means that the check below is overly
1812 * conservative in the sense that an osr compilation in the queue
1813 * will block a normal compilation from entering the queue (and vice
1814 * versa). This can be remedied by a full queue search to disambiguate
1815 * cases. If it is deemed profitable, this may be done.
1816 */
1817 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1818 return method->queued_for_compilation();
1819 }
1820
1821 // ------------------------------------------------------------------
1822 // CompileBroker::compilation_is_prohibited
1823 //
1824 // See if this compilation is not allowed.
1825 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1826 bool is_native = method->is_native();
1827 // Some compilers may not support the compilation of natives.
1828 AbstractCompiler *comp = compiler(comp_level);
1829 if (is_native && (!CICompileNatives || comp == nullptr)) {
1830 method->set_not_compilable_quietly("native methods not supported", comp_level);
1831 return true;
1832 }
1833
1834 bool is_osr = (osr_bci != standard_entry_bci);
1835 // Some compilers may not support on stack replacement.
1836 if (is_osr && (!CICompileOSR || comp == nullptr)) {
1837 method->set_not_osr_compilable("OSR not supported", comp_level);
1838 return true;
1839 }
1840
1841 // The method may be explicitly excluded by the user.
1842 double scale;
1843 if (excluded || (CompilerOracle::has_option_value(method, CompileCommandEnum::CompileThresholdScaling, scale) && scale == 0)) {
1844 bool quietly = CompilerOracle::be_quiet();
1845 if (PrintCompilation && !quietly) {
1846 // This does not happen quietly...
1847 ResourceMark rm;
1848 tty->print("### Excluding %s:%s",
1849 method->is_native() ? "generation of native wrapper" : "compile",
1850 (method->is_static() ? " static" : ""));
1851 method->print_short_name(tty);
1852 tty->cr();
1853 }
1854 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1855 }
1856
1857 return false;
1858 }
1859
1860 /**
1861 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1862 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1863 * The function also allows to generate separate compilation IDs for OSR compilations.
1864 */
1865 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1866 #ifdef ASSERT
1867 bool is_osr = (osr_bci != standard_entry_bci);
1868 int id;
1869 if (method->is_native()) {
1870 assert(!is_osr, "can't be osr");
1871 // Adapters, native wrappers and method handle intrinsics
1872 // should be generated always.
1873 return Atomic::add(CICountNative ? &_native_compilation_id : &_compilation_id, 1);
1874 } else if (CICountOSR && is_osr) {
1875 id = Atomic::add(&_osr_compilation_id, 1);
1876 if (CIStartOSR <= id && id < CIStopOSR) {
1877 return id;
1878 }
1879 } else {
1880 id = Atomic::add(&_compilation_id, 1);
1881 if (CIStart <= id && id < CIStop) {
1882 return id;
1883 }
1884 }
1885
1886 // Method was not in the appropriate compilation range.
1887 method->set_not_compilable_quietly("Not in requested compile id range");
1888 return 0;
1889 #else
1890 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1891 // only _compilation_id is incremented.
1892 return Atomic::add(&_compilation_id, 1);
1893 #endif
1894 }
1895
1896 // ------------------------------------------------------------------
1897 // CompileBroker::assign_compile_id_unlocked
1898 //
1899 // Public wrapper for assign_compile_id that acquires the needed locks
1900 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1901 return assign_compile_id(method, osr_bci);
1902 }
1903
1904 // ------------------------------------------------------------------
1905 // CompileBroker::create_compile_task
1906 //
1907 // Create a CompileTask object representing the current request for
1908 // compilation. Add this task to the queue.
1909 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1910 int compile_id,
1911 const methodHandle& method,
1912 int osr_bci,
1913 int comp_level,
1914 const methodHandle& hot_method,
1915 int hot_count,
1916 SCCEntry* scc_entry,
1917 CompileTask::CompileReason compile_reason,
1918 bool requires_online_compilation,
1919 bool blocking) {
1920 CompileTask* new_task = CompileTask::allocate();
1921 new_task->initialize(compile_id, method, osr_bci, comp_level,
1922 hot_method, hot_count, scc_entry, compile_reason, queue,
1923 requires_online_compilation, blocking);
1924 return new_task;
1925 }
1926
1927 #if INCLUDE_JVMCI
1928 // The number of milliseconds to wait before checking if
1929 // JVMCI compilation has made progress.
1930 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1931
1932 // The number of JVMCI compilation progress checks that must fail
1933 // before unblocking a thread waiting for a blocking compilation.
1934 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1935
1936 /**
1937 * Waits for a JVMCI compiler to complete a given task. This thread
1938 * waits until either the task completes or it sees no JVMCI compilation
1939 * progress for N consecutive milliseconds where N is
1940 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1941 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1942 *
1943 * @return true if this thread needs to free/recycle the task
1944 */
1945 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1946 assert(UseJVMCICompiler, "sanity");
1947 MonitorLocker ml(thread, task->lock());
1948 int progress_wait_attempts = 0;
1949 jint thread_jvmci_compilation_ticks = 0;
1950 jint global_jvmci_compilation_ticks = jvmci->global_compilation_ticks();
1951 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1952 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1953 JVMCICompileState* jvmci_compile_state = task->blocking_jvmci_compile_state();
1954
1955 bool progress;
1956 if (jvmci_compile_state != nullptr) {
1957 jint ticks = jvmci_compile_state->compilation_ticks();
1958 progress = (ticks - thread_jvmci_compilation_ticks) != 0;
1959 JVMCI_event_1("waiting on compilation %d [ticks=%d]", task->compile_id(), ticks);
1960 thread_jvmci_compilation_ticks = ticks;
1961 } else {
1962 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1963 // that all JVMCI compiler threads are blocked on. We use the global JVMCI
1964 // compilation ticks to determine whether JVMCI compilation
1965 // is still making progress through the JVMCI compiler queue.
1966 jint ticks = jvmci->global_compilation_ticks();
1967 progress = (ticks - global_jvmci_compilation_ticks) != 0;
1968 JVMCI_event_1("waiting on compilation %d to be queued [ticks=%d]", task->compile_id(), ticks);
1969 global_jvmci_compilation_ticks = ticks;
1970 }
1971
1972 if (!progress) {
1973 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1974 if (PrintCompilation) {
1975 task->print(tty, "wait for blocking compilation timed out");
1976 }
1977 JVMCI_event_1("waiting on compilation %d timed out", task->compile_id());
1978 break;
1979 }
1980 } else {
1981 progress_wait_attempts = 0;
1982 }
1983 }
1984 task->clear_waiter();
1985 return task->is_complete();
1986 }
1987 #endif
1988
1989 /**
1990 * Wait for the compilation task to complete.
1991 */
1992 void CompileBroker::wait_for_completion(CompileTask* task) {
1993 if (CIPrintCompileQueue) {
1994 ttyLocker ttyl;
1995 tty->print_cr("BLOCKING FOR COMPILE");
1996 }
1997
1998 assert(task->is_blocking(), "can only wait on blocking task");
1999
2000 JavaThread* thread = JavaThread::current();
2001
2002 methodHandle method(thread, task->method());
2003 bool free_task;
2004 #if INCLUDE_JVMCI
2005 AbstractCompiler* comp = compiler(task->comp_level());
2006 if (!UseJVMCINativeLibrary && comp->is_jvmci() && !task->should_wait_for_compilation()) {
2007 // It may return before compilation is completed.
2008 // Note that libjvmci should not pre-emptively unblock
2009 // a thread waiting for a compilation as it does not call
2010 // Java code and so is not deadlock prone like jarjvmci.
2011 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
2012 } else
2013 #endif
2014 {
2015 MonitorLocker ml(thread, task->lock());
2016 free_task = true;
2017 while (!task->is_complete() && !is_compilation_disabled_forever()) {
2018 ml.wait();
2019 }
2020 }
2021
2022 if (free_task) {
2023 if (is_compilation_disabled_forever()) {
2024 CompileTask::free(task);
2025 return;
2026 }
2027
2028 // It is harmless to check this status without the lock, because
2029 // completion is a stable property (until the task object is recycled).
2030 assert(task->is_complete(), "Compilation should have completed");
2031
2032 // By convention, the waiter is responsible for recycling a
2033 // blocking CompileTask. Since there is only one waiter ever
2034 // waiting on a CompileTask, we know that no one else will
2035 // be using this CompileTask; we can free it.
2036 CompileTask::free(task);
2037 }
2038 }
2039
2040 /**
2041 * Initialize compiler thread(s) + compiler object(s). The postcondition
2042 * of this function is that the compiler runtimes are initialized and that
2043 * compiler threads can start compiling.
2044 */
2045 bool CompileBroker::init_compiler_runtime() {
2046 CompilerThread* thread = CompilerThread::current();
2047 AbstractCompiler* comp = thread->compiler();
2048 // Final sanity check - the compiler object must exist
2049 guarantee(comp != nullptr, "Compiler object must exist");
2050
2051 {
2052 // Must switch to native to allocate ci_env
2053 ThreadToNativeFromVM ttn(thread);
2054 ciEnv ci_env((CompileTask*)nullptr);
2055 // Cache Jvmti state
2056 ci_env.cache_jvmti_state();
2057 // Cache DTrace flags
2058 ci_env.cache_dtrace_flags();
2059
2060 // Switch back to VM state to do compiler initialization
2061 ThreadInVMfromNative tv(thread);
2062
2063 // Perform per-thread and global initializations
2064 {
2065 MutexLocker only_one (thread, CompileThread_lock);
2066 SCCache::init_table();
2067 }
2068 comp->initialize();
2069 }
2070
2071 if (comp->is_failed()) {
2072 disable_compilation_forever();
2073 // If compiler initialization failed, no compiler thread that is specific to a
2074 // particular compiler runtime will ever start to compile methods.
2075 shutdown_compiler_runtime(comp, thread);
2076 return false;
2077 }
2078
2079 // C1 specific check
2080 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2081 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2082 return false;
2083 }
2084
2085 return true;
2086 }
2087
2088 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2089 BufferBlob* blob = thread->get_buffer_blob();
2090 if (blob != nullptr) {
2091 blob->purge();
2092 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2093 CodeCache::free(blob);
2094 }
2095 }
2096
2097 /**
2098 * If C1 and/or C2 initialization failed, we shut down all compilation.
2099 * We do this to keep things simple. This can be changed if it ever turns
2100 * out to be a problem.
2101 */
2102 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2103 free_buffer_blob_if_allocated(thread);
2104
2105 log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2106
2107 if (comp->should_perform_shutdown()) {
2108 // There are two reasons for shutting down the compiler
2109 // 1) compiler runtime initialization failed
2110 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2111 warning("%s initialization failed. Shutting down all compilers", comp->name());
2112
2113 // Only one thread per compiler runtime object enters here
2114 // Set state to shut down
2115 comp->set_shut_down();
2116
2117 // Delete all queued compilation tasks to make compiler threads exit faster.
2118 if (_c1_compile_queue != nullptr) {
2119 _c1_compile_queue->free_all();
2120 }
2121
2122 if (_c2_compile_queue != nullptr) {
2123 _c2_compile_queue->free_all();
2124 }
2125
2126 if (_c3_compile_queue != nullptr) {
2127 _c3_compile_queue->free_all();
2128 }
2129
2130 // Set flags so that we continue execution with using interpreter only.
2131 UseCompiler = false;
2132 UseInterpreter = true;
2133
2134 // We could delete compiler runtimes also. However, there are references to
2135 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
2136 // fail. This can be done later if necessary.
2137 }
2138 }
2139
2140 /**
2141 * Helper function to create new or reuse old CompileLog.
2142 */
2143 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2144 if (!LogCompilation) return nullptr;
2145
2146 AbstractCompiler *compiler = ct->compiler();
2147 bool jvmci = JVMCI_ONLY( compiler->is_jvmci() ||) false;
2148 bool c1 = compiler->is_c1();
2149 jobject* compiler_objects = c1 ? _compiler1_objects : (_c3_count == 0 ? _compiler2_objects : (jvmci ? _compiler2_objects : _compiler3_objects));
2150 assert(compiler_objects != nullptr, "must be initialized at this point");
2151 CompileLog** logs = c1 ? _compiler1_logs : (_c3_count == 0 ? _compiler2_logs : (jvmci ? _compiler2_logs : _compiler3_logs));
2152 assert(logs != nullptr, "must be initialized at this point");
2153 int count = c1 ? _c1_count : (_c3_count == 0 ? _c2_count : (jvmci ? _c2_count : _c3_count));
2154
2155 if (ct->queue() == _sc1_compile_queue || ct->queue() == _sc2_compile_queue) {
2156 compiler_objects = _sc_objects;
2157 logs = _sc_logs;
2158 count = _sc_count;
2159 }
2160 // Find Compiler number by its threadObj.
2161 oop compiler_obj = ct->threadObj();
2162 int compiler_number = 0;
2163 bool found = false;
2164 for (; compiler_number < count; compiler_number++) {
2165 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2166 found = true;
2167 break;
2168 }
2169 }
2170 assert(found, "Compiler must exist at this point");
2171
2172 // Determine pointer for this thread's log.
2173 CompileLog** log_ptr = &logs[compiler_number];
2174
2175 // Return old one if it exists.
2176 CompileLog* log = *log_ptr;
2177 if (log != nullptr) {
2178 ct->init_log(log);
2179 return log;
2180 }
2181
2182 // Create a new one and remember it.
2183 init_compiler_thread_log();
2184 log = ct->log();
2185 *log_ptr = log;
2186 return log;
2187 }
2188
2189 // ------------------------------------------------------------------
2190 // CompileBroker::compiler_thread_loop
2191 //
2192 // The main loop run by a CompilerThread.
2193 void CompileBroker::compiler_thread_loop() {
2194 CompilerThread* thread = CompilerThread::current();
2195 CompileQueue* queue = thread->queue();
2196 // For the thread that initializes the ciObjectFactory
2197 // this resource mark holds all the shared objects
2198 ResourceMark rm;
2199
2200 // First thread to get here will initialize the compiler interface
2201
2202 {
2203 ASSERT_IN_VM;
2204 MutexLocker only_one (thread, CompileThread_lock);
2205 if (!ciObjectFactory::is_initialized()) {
2206 ciObjectFactory::initialize();
2207 }
2208 }
2209
2210 // Open a log.
2211 CompileLog* log = get_log(thread);
2212 if (log != nullptr) {
2213 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
2214 thread->name(),
2215 os::current_thread_id(),
2216 os::current_process_id());
2217 log->stamp();
2218 log->end_elem();
2219 }
2220
2221 // If compiler thread/runtime initialization fails, exit the compiler thread
2222 if (!init_compiler_runtime()) {
2223 return;
2224 }
2225
2226 thread->start_idle_timer();
2227
2228 // Poll for new compilation tasks as long as the JVM runs. Compilation
2229 // should only be disabled if something went wrong while initializing the
2230 // compiler runtimes. This, in turn, should not happen. The only known case
2231 // when compiler runtime initialization fails is if there is not enough free
2232 // space in the code cache to generate the necessary stubs, etc.
2233 while (!is_compilation_disabled_forever()) {
2234 // We need this HandleMark to avoid leaking VM handles.
2235 HandleMark hm(thread);
2236
2237 RecompilationPolicy::recompilation_step(RecompilationWorkUnitSize, thread);
2238
2239 CompileTask* task = queue->get(thread);
2240
2241 if (task == nullptr) {
2242 if (UseDynamicNumberOfCompilerThreads) {
2243 // Access compiler_count under lock to enforce consistency.
2244 MutexLocker only_one(CompileThread_lock);
2245 if (can_remove(thread, true)) {
2246 if (trace_compiler_threads()) {
2247 ResourceMark rm;
2248 stringStream msg;
2249 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2250 thread->name(), thread->idle_time_millis());
2251 print_compiler_threads(msg);
2252 }
2253
2254 // Notify compiler that the compiler thread is about to stop
2255 thread->compiler()->stopping_compiler_thread(thread);
2256
2257 free_buffer_blob_if_allocated(thread);
2258 return; // Stop this thread.
2259 }
2260 }
2261 } else {
2262 // Assign the task to the current thread. Mark this compilation
2263 // thread as active for the profiler.
2264 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2265 // occurs after fetching the compile task off the queue.
2266 CompileTaskWrapper ctw(task);
2267 methodHandle method(thread, task->method());
2268
2269 // Never compile a method if breakpoints are present in it
2270 if (method()->number_of_breakpoints() == 0) {
2271 // Compile the method.
2272 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2273 invoke_compiler_on_method(task);
2274 thread->start_idle_timer();
2275 } else {
2276 // After compilation is disabled, remove remaining methods from queue
2277 method->clear_queued_for_compilation();
2278 method->set_pending_queue_processed(false);
2279 task->set_failure_reason("compilation is disabled");
2280 }
2281 } else {
2282 task->set_failure_reason("breakpoints are present");
2283 }
2284
2285 if (UseDynamicNumberOfCompilerThreads) {
2286 possibly_add_compiler_threads(thread);
2287 assert(!thread->has_pending_exception(), "should have been handled");
2288 }
2289 }
2290 }
2291
2292 // Shut down compiler runtime
2293 shutdown_compiler_runtime(thread->compiler(), thread);
2294 }
2295
2296 // ------------------------------------------------------------------
2297 // CompileBroker::init_compiler_thread_log
2298 //
2299 // Set up state required by +LogCompilation.
2300 void CompileBroker::init_compiler_thread_log() {
2301 CompilerThread* thread = CompilerThread::current();
2302 char file_name[4*K];
2303 FILE* fp = nullptr;
2304 intx thread_id = os::current_thread_id();
2305 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
2306 const char* dir = (try_temp_dir ? os::get_temp_directory() : nullptr);
2307 if (dir == nullptr) {
2308 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
2309 thread_id, os::current_process_id());
2310 } else {
2311 jio_snprintf(file_name, sizeof(file_name),
2312 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
2313 os::file_separator(), thread_id, os::current_process_id());
2314 }
2315
2316 fp = os::fopen(file_name, "wt");
2317 if (fp != nullptr) {
2318 if (LogCompilation && Verbose) {
2319 tty->print_cr("Opening compilation log %s", file_name);
2320 }
2321 CompileLog* log = new(mtCompiler) CompileLog(file_name, fp, thread_id);
2322 if (log == nullptr) {
2323 fclose(fp);
2324 return;
2325 }
2326 thread->init_log(log);
2327
2328 if (xtty != nullptr) {
2329 ttyLocker ttyl;
2330 // Record any per thread log files
2331 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
2332 }
2333 return;
2334 }
2335 }
2336 warning("Cannot open log file: %s", file_name);
2337 }
2338
2339 void CompileBroker::log_metaspace_failure() {
2340 const char* message = "some methods may not be compiled because metaspace "
2341 "is out of memory";
2342 if (CompilationLog::log() != nullptr) {
2343 CompilationLog::log()->log_metaspace_failure(message);
2344 }
2345 if (PrintCompilation) {
2346 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
2347 }
2348 }
2349
2350
2351 // ------------------------------------------------------------------
2352 // CompileBroker::set_should_block
2353 //
2354 // Set _should_block.
2355 // Call this from the VM, with Threads_lock held and a safepoint requested.
2356 void CompileBroker::set_should_block() {
2357 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
2358 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
2359 #ifndef PRODUCT
2360 if (PrintCompilation && (Verbose || WizardMode))
2361 tty->print_cr("notifying compiler thread pool to block");
2362 #endif
2363 _should_block = true;
2364 }
2365
2366 // ------------------------------------------------------------------
2367 // CompileBroker::maybe_block
2368 //
2369 // Call this from the compiler at convenient points, to poll for _should_block.
2370 void CompileBroker::maybe_block() {
2371 if (_should_block) {
2372 #ifndef PRODUCT
2373 if (PrintCompilation && (Verbose || WizardMode))
2374 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
2375 #endif
2376 ThreadInVMfromNative tivfn(JavaThread::current());
2377 }
2378 }
2379
2380 // wrapper for CodeCache::print_summary()
2381 static void codecache_print(bool detailed)
2382 {
2383 stringStream s;
2384 // Dump code cache into a buffer before locking the tty,
2385 {
2386 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2387 CodeCache::print_summary(&s, detailed);
2388 }
2389 ttyLocker ttyl;
2390 tty->print("%s", s.freeze());
2391 }
2392
2393 // wrapper for CodeCache::print_summary() using outputStream
2394 static void codecache_print(outputStream* out, bool detailed) {
2395 stringStream s;
2396
2397 // Dump code cache into a buffer
2398 {
2399 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2400 CodeCache::print_summary(&s, detailed);
2401 }
2402
2403 char* remaining_log = s.as_string();
2404 while (*remaining_log != '\0') {
2405 char* eol = strchr(remaining_log, '\n');
2406 if (eol == nullptr) {
2407 out->print_cr("%s", remaining_log);
2408 remaining_log = remaining_log + strlen(remaining_log);
2409 } else {
2410 *eol = '\0';
2411 out->print_cr("%s", remaining_log);
2412 remaining_log = eol + 1;
2413 }
2414 }
2415 }
2416
2417 void CompileBroker::handle_compile_error(CompilerThread* thread, CompileTask* task, ciEnv* ci_env,
2418 int compilable, const char* failure_reason) {
2419 if (!AbortVMOnCompilationFailure) {
2420 return;
2421 }
2422 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
2423 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
2424 }
2425 if (compilable == ciEnv::MethodCompilable_never) {
2426 fatal("Never compilable: %s", failure_reason);
2427 }
2428 }
2429
2430 static void post_compilation_event(EventCompilation& event, CompileTask* task) {
2431 assert(task != nullptr, "invariant");
2432 CompilerEvent::CompilationEvent::post(event,
2433 task->compile_id(),
2434 task->compiler()->type(),
2435 task->method(),
2436 task->comp_level(),
2437 task->is_success(),
2438 task->osr_bci() != CompileBroker::standard_entry_bci,
2439 task->nm_total_size(),
2440 task->num_inlined_bytecodes(),
2441 task->arena_bytes());
2442 }
2443
2444 int DirectivesStack::_depth = 0;
2445 CompilerDirectives* DirectivesStack::_top = nullptr;
2446 CompilerDirectives* DirectivesStack::_bottom = nullptr;
2447
2448 // Acquires Compilation_lock and waits for it to be notified
2449 // as long as WhiteBox::compilation_locked is true.
2450 static void whitebox_lock_compilation() {
2451 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2452 while (WhiteBox::compilation_locked) {
2453 locker.wait();
2454 }
2455 }
2456
2457 // ------------------------------------------------------------------
2458 // CompileBroker::invoke_compiler_on_method
2459 //
2460 // Compile a method.
2461 //
2462 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2463 task->print_ul();
2464 elapsedTimer time;
2465
2466 DirectiveSet* directive = task->directive();
2467 if (directive->PrintCompilationOption) {
2468 ResourceMark rm;
2469 task->print_tty();
2470 }
2471
2472 CompilerThread* thread = CompilerThread::current();
2473 ResourceMark rm(thread);
2474
2475 if (CompilationLog::log() != nullptr) {
2476 CompilationLog::log()->log_compile(thread, task);
2477 }
2478
2479 // Common flags.
2480 int compile_id = task->compile_id();
2481 int osr_bci = task->osr_bci();
2482 bool is_osr = (osr_bci != standard_entry_bci);
2483 bool should_log = (thread->log() != nullptr);
2484 bool should_break = false;
2485 const int task_level = task->comp_level();
2486 AbstractCompiler* comp = task->compiler();
2487 CompileTrainingData* tdata = task->training_data();
2488 assert(tdata == nullptr || TrainingData::need_data() ||
2489 CDSConfig::is_dumping_preimage_static_archive(), ""); // FIXME: MetaspaceShared::preload_and_dump() messes with RecordTraining flag
2490 {
2491 // create the handle inside it's own block so it can't
2492 // accidentally be referenced once the thread transitions to
2493 // native. The NoHandleMark before the transition should catch
2494 // any cases where this occurs in the future.
2495 methodHandle method(thread, task->method());
2496
2497 assert(!method->is_native(), "no longer compile natives");
2498
2499 // Update compile information when using perfdata.
2500 if (UsePerfData) {
2501 update_compile_perf_data(thread, method, is_osr);
2502 }
2503
2504 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2505 }
2506
2507 if (tdata != nullptr) {
2508 tdata->record_compilation_start(task);
2509 }
2510
2511 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2512 if (should_log && !directive->LogOption) {
2513 should_log = false;
2514 }
2515
2516 // Allocate a new set of JNI handles.
2517 JNIHandleMark jhm(thread);
2518 Method* target_handle = task->method();
2519 int compilable = ciEnv::MethodCompilable;
2520 const char* failure_reason = nullptr;
2521 bool failure_reason_on_C_heap = false;
2522 const char* retry_message = nullptr;
2523
2524 #if INCLUDE_JVMCI
2525 if (UseJVMCICompiler && comp != nullptr && comp->is_jvmci()) {
2526 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2527
2528 TraceTime t1("compilation", &time);
2529 EventCompilation event;
2530 JVMCICompileState compile_state(task, jvmci);
2531 JVMCIRuntime *runtime = nullptr;
2532
2533 if (JVMCI::in_shutdown()) {
2534 failure_reason = "in JVMCI shutdown";
2535 retry_message = "not retryable";
2536 compilable = ciEnv::MethodCompilable_never;
2537 } else if (compile_state.target_method_is_old()) {
2538 // Skip redefined methods
2539 failure_reason = "redefined method";
2540 retry_message = "not retryable";
2541 compilable = ciEnv::MethodCompilable_never;
2542 } else {
2543 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2544 if (env.init_error() != JNI_OK) {
2545 const char* msg = env.init_error_msg();
2546 failure_reason = os::strdup(err_msg("Error attaching to libjvmci (err: %d, %s)",
2547 env.init_error(), msg == nullptr ? "unknown" : msg), mtJVMCI);
2548 bool reason_on_C_heap = true;
2549 // In case of JNI_ENOMEM, there's a good chance a subsequent attempt to create libjvmci or attach to it
2550 // might succeed. Other errors most likely indicate a non-recoverable error in the JVMCI runtime.
2551 bool retryable = env.init_error() == JNI_ENOMEM;
2552 compile_state.set_failure(retryable, failure_reason, reason_on_C_heap);
2553 }
2554 if (failure_reason == nullptr) {
2555 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2556 // Must switch to native to block
2557 ThreadToNativeFromVM ttn(thread);
2558 whitebox_lock_compilation();
2559 }
2560 methodHandle method(thread, target_handle);
2561 runtime = env.runtime();
2562 runtime->compile_method(&env, jvmci, method, osr_bci);
2563
2564 failure_reason = compile_state.failure_reason();
2565 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2566 if (!compile_state.retryable()) {
2567 retry_message = "not retryable";
2568 compilable = ciEnv::MethodCompilable_not_at_tier;
2569 }
2570 if (!task->is_success()) {
2571 assert(failure_reason != nullptr, "must specify failure_reason");
2572 }
2573 }
2574 }
2575 if (!task->is_success() && !JVMCI::in_shutdown()) {
2576 handle_compile_error(thread, task, nullptr, compilable, failure_reason);
2577 }
2578 if (event.should_commit()) {
2579 post_compilation_event(event, task);
2580 }
2581
2582 if (runtime != nullptr) {
2583 runtime->post_compile(thread);
2584 }
2585 } else
2586 #endif // INCLUDE_JVMCI
2587 {
2588 NoHandleMark nhm;
2589 ThreadToNativeFromVM ttn(thread);
2590
2591 ciEnv ci_env(task);
2592 if (should_break) {
2593 ci_env.set_break_at_compile(true);
2594 }
2595 if (should_log) {
2596 ci_env.set_log(thread->log());
2597 }
2598 assert(thread->env() == &ci_env, "set by ci_env");
2599 // The thread-env() field is cleared in ~CompileTaskWrapper.
2600
2601 // Cache Jvmti state
2602 bool method_is_old = ci_env.cache_jvmti_state();
2603
2604 // Skip redefined methods
2605 if (method_is_old) {
2606 ci_env.record_method_not_compilable("redefined method", true);
2607 }
2608
2609 // Cache DTrace flags
2610 ci_env.cache_dtrace_flags();
2611
2612 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2613
2614 TraceTime t1("compilation", &time);
2615 EventCompilation event;
2616
2617 bool install_code = true;
2618 if (comp == nullptr) {
2619 ci_env.record_method_not_compilable("no compiler");
2620 } else if (!ci_env.failing()) {
2621 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2622 whitebox_lock_compilation();
2623 }
2624 if (StoreCachedCode && task->is_precompiled()) {
2625 install_code = false; // not suitable in the current context
2626 }
2627 comp->compile_method(&ci_env, target, osr_bci, install_code, directive);
2628
2629 /* Repeat compilation without installing code for profiling purposes */
2630 int repeat_compilation_count = directive->RepeatCompilationOption;
2631 while (repeat_compilation_count > 0) {
2632 ResourceMark rm(thread);
2633 task->print_ul("NO CODE INSTALLED");
2634 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2635 repeat_compilation_count--;
2636 }
2637 }
2638
2639 DirectivesStack::release(directive);
2640
2641 if (!ci_env.failing() && !task->is_success() && install_code) {
2642 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2643 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2644 // The compiler elected, without comment, not to register a result.
2645 // Do not attempt further compilations of this method.
2646 ci_env.record_method_not_compilable("compile failed");
2647 }
2648
2649 // Copy this bit to the enclosing block:
2650 compilable = ci_env.compilable();
2651
2652 if (ci_env.failing()) {
2653 // Duplicate the failure reason string, so that it outlives ciEnv
2654 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2655 failure_reason_on_C_heap = true;
2656 retry_message = ci_env.retry_message();
2657 ci_env.report_failure(failure_reason);
2658 }
2659
2660 if (ci_env.failing()) {
2661 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2662 }
2663 if (event.should_commit()) {
2664 post_compilation_event(event, task);
2665 }
2666 }
2667
2668 if (failure_reason != nullptr) {
2669 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2670 if (CompilationLog::log() != nullptr) {
2671 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2672 }
2673 if (PrintCompilation) {
2674 FormatBufferResource msg = retry_message != nullptr ?
2675 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2676 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2677 task->print(tty, msg);
2678 }
2679 }
2680
2681 task->mark_finished(os::elapsed_counter());
2682
2683 if (tdata != nullptr) {
2684 tdata->record_compilation_end(task);
2685 }
2686
2687 methodHandle method(thread, task->method());
2688
2689 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2690
2691 collect_statistics(thread, time, task);
2692
2693 if (PrintCompilation && PrintCompilation2) {
2694 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2695 tty->print("%4d ", compile_id); // print compilation number
2696 tty->print("%s ", (is_osr ? "%" : (task->is_scc() ? "A" : " ")));
2697 if (task->is_success()) {
2698 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2699 }
2700 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2701 }
2702
2703 Log(compilation, codecache) log;
2704 if (log.is_debug()) {
2705 LogStream ls(log.debug());
2706 codecache_print(&ls, /* detailed= */ false);
2707 }
2708 if (PrintCodeCacheOnCompilation) {
2709 codecache_print(/* detailed= */ false);
2710 }
2711 // Disable compilation, if required.
2712 switch (compilable) {
2713 case ciEnv::MethodCompilable_never:
2714 if (is_osr)
2715 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2716 else
2717 method->set_not_compilable_quietly("MethodCompilable_never");
2718 break;
2719 case ciEnv::MethodCompilable_not_at_tier:
2720 if (is_osr)
2721 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2722 else
2723 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2724 break;
2725 }
2726
2727 // Note that the queued_for_compilation bits are cleared without
2728 // protection of a mutex. [They were set by the requester thread,
2729 // when adding the task to the compile queue -- at which time the
2730 // compile queue lock was held. Subsequently, we acquired the compile
2731 // queue lock to get this task off the compile queue; thus (to belabour
2732 // the point somewhat) our clearing of the bits must be occurring
2733 // only after the setting of the bits. See also 14012000 above.
2734 method->clear_queued_for_compilation();
2735 method->set_pending_queue_processed(false);
2736
2737 if (PrintCompilation) {
2738 ResourceMark rm;
2739 task->print_tty();
2740 }
2741 }
2742
2743 /**
2744 * The CodeCache is full. Print warning and disable compilation.
2745 * Schedule code cache cleaning so compilation can continue later.
2746 * This function needs to be called only from CodeCache::allocate(),
2747 * since we currently handle a full code cache uniformly.
2748 */
2749 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2750 UseInterpreter = true;
2751 if (UseCompiler || AlwaysCompileLoopMethods ) {
2752 if (xtty != nullptr) {
2753 stringStream s;
2754 // Dump code cache state into a buffer before locking the tty,
2755 // because log_state() will use locks causing lock conflicts.
2756 CodeCache::log_state(&s);
2757 // Lock to prevent tearing
2758 ttyLocker ttyl;
2759 xtty->begin_elem("code_cache_full");
2760 xtty->print("%s", s.freeze());
2761 xtty->stamp();
2762 xtty->end_elem();
2763 }
2764
2765 #ifndef PRODUCT
2766 if (ExitOnFullCodeCache) {
2767 codecache_print(/* detailed= */ true);
2768 before_exit(JavaThread::current());
2769 exit_globals(); // will delete tty
2770 vm_direct_exit(1);
2771 }
2772 #endif
2773 if (UseCodeCacheFlushing) {
2774 // Since code cache is full, immediately stop new compiles
2775 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2776 log_info(codecache)("Code cache is full - disabling compilation");
2777 }
2778 } else {
2779 disable_compilation_forever();
2780 }
2781
2782 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2783 }
2784 }
2785
2786 // ------------------------------------------------------------------
2787 // CompileBroker::update_compile_perf_data
2788 //
2789 // Record this compilation for debugging purposes.
2790 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2791 ResourceMark rm;
2792 char* method_name = method->name()->as_C_string();
2793 char current_method[CompilerCounters::cmname_buffer_length];
2794 size_t maxLen = CompilerCounters::cmname_buffer_length;
2795
2796 const char* class_name = method->method_holder()->name()->as_C_string();
2797
2798 size_t s1len = strlen(class_name);
2799 size_t s2len = strlen(method_name);
2800
2801 // check if we need to truncate the string
2802 if (s1len + s2len + 2 > maxLen) {
2803
2804 // the strategy is to lop off the leading characters of the
2805 // class name and the trailing characters of the method name.
2806
2807 if (s2len + 2 > maxLen) {
2808 // lop of the entire class name string, let snprintf handle
2809 // truncation of the method name.
2810 class_name += s1len; // null string
2811 }
2812 else {
2813 // lop off the extra characters from the front of the class name
2814 class_name += ((s1len + s2len + 2) - maxLen);
2815 }
2816 }
2817
2818 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2819
2820 int last_compile_type = normal_compile;
2821 if (CICountOSR && is_osr) {
2822 last_compile_type = osr_compile;
2823 } else if (CICountNative && method->is_native()) {
2824 last_compile_type = native_compile;
2825 }
2826
2827 CompilerCounters* counters = thread->counters();
2828 counters->set_current_method(current_method);
2829 counters->set_compile_type((jlong) last_compile_type);
2830 }
2831
2832 // ------------------------------------------------------------------
2833 // CompileBroker::collect_statistics
2834 //
2835 // Collect statistics about the compilation.
2836
2837 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2838 bool success = task->is_success();
2839 methodHandle method (thread, task->method());
2840 int compile_id = task->compile_id();
2841 bool is_osr = (task->osr_bci() != standard_entry_bci);
2842 const int comp_level = task->comp_level();
2843 CompilerCounters* counters = thread->counters();
2844
2845 MutexLocker locker(CompileStatistics_lock);
2846
2847 // _perf variables are production performance counters which are
2848 // updated regardless of the setting of the CITime and CITimeEach flags
2849 //
2850
2851 // account all time, including bailouts and failures in this counter;
2852 // C1 and C2 counters are counting both successful and unsuccessful compiles
2853 _t_total_compilation.add(&time);
2854
2855 if (!success) {
2856 _total_bailout_count++;
2857 if (UsePerfData) {
2858 _perf_last_failed_method->set_value(counters->current_method());
2859 _perf_last_failed_type->set_value(counters->compile_type());
2860 _perf_total_bailout_count->inc();
2861 }
2862 _t_bailedout_compilation.add(&time);
2863
2864 if (CITime || log_is_enabled(Info, init)) {
2865 CompilerStatistics* stats = nullptr;
2866 if (task->is_scc()) {
2867 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2868 stats = &_scc_stats_per_level[level];
2869 } else {
2870 stats = &_stats_per_level[comp_level-1];
2871 }
2872 stats->_bailout.update(time, 0);
2873 }
2874 } else if (!task->is_success()) {
2875 if (UsePerfData) {
2876 _perf_last_invalidated_method->set_value(counters->current_method());
2877 _perf_last_invalidated_type->set_value(counters->compile_type());
2878 _perf_total_invalidated_count->inc();
2879 }
2880 _total_invalidated_count++;
2881 _t_invalidated_compilation.add(&time);
2882
2883 if (CITime || log_is_enabled(Info, init)) {
2884 CompilerStatistics* stats = nullptr;
2885 if (task->is_scc()) {
2886 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2887 stats = &_scc_stats_per_level[level];
2888 } else {
2889 stats = &_stats_per_level[comp_level-1];
2890 }
2891 stats->_invalidated.update(time, 0);
2892 }
2893 } else {
2894 // Compilation succeeded
2895
2896 // update compilation ticks - used by the implementation of
2897 // java.lang.management.CompilationMXBean
2898 _perf_total_compilation->inc(time.ticks());
2899 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2900
2901 if (CITime || log_is_enabled(Info, init)) {
2902 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2903 if (is_osr) {
2904 _t_osr_compilation.add(&time);
2905 _sum_osr_bytes_compiled += bytes_compiled;
2906 } else {
2907 _t_standard_compilation.add(&time);
2908 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2909 }
2910
2911 // Collect statistic per compilation level
2912 if (task->is_scc()) {
2913 _scc_stats._standard.update(time, bytes_compiled);
2914 _scc_stats._nmethods_size += task->nm_total_size();
2915 _scc_stats._nmethods_code_size += task->nm_insts_size();
2916 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2917 CompilerStatistics* stats = &_scc_stats_per_level[level];
2918 stats->_standard.update(time, bytes_compiled);
2919 stats->_nmethods_size += task->nm_total_size();
2920 stats->_nmethods_code_size += task->nm_insts_size();
2921 } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2922 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2923 if (is_osr) {
2924 stats->_osr.update(time, bytes_compiled);
2925 } else {
2926 stats->_standard.update(time, bytes_compiled);
2927 }
2928 stats->_nmethods_size += task->nm_total_size();
2929 stats->_nmethods_code_size += task->nm_insts_size();
2930 } else {
2931 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2932 }
2933
2934 // Collect statistic per compiler
2935 AbstractCompiler* comp = task->compiler();
2936 if (comp && !task->is_scc()) {
2937 CompilerStatistics* stats = comp->stats();
2938 if (is_osr) {
2939 stats->_osr.update(time, bytes_compiled);
2940 } else {
2941 stats->_standard.update(time, bytes_compiled);
2942 }
2943 stats->_nmethods_size += task->nm_total_size();
2944 stats->_nmethods_code_size += task->nm_insts_size();
2945 } else if (!task->is_scc()) { // if (!comp)
2946 assert(false, "Compiler object must exist");
2947 }
2948 }
2949
2950 if (UsePerfData) {
2951 // save the name of the last method compiled
2952 _perf_last_method->set_value(counters->current_method());
2953 _perf_last_compile_type->set_value(counters->compile_type());
2954 _perf_last_compile_size->set_value(method->code_size() +
2955 task->num_inlined_bytecodes());
2956 if (is_osr) {
2957 _perf_osr_compilation->inc(time.ticks());
2958 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2959 } else {
2960 _perf_standard_compilation->inc(time.ticks());
2961 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2962 }
2963 }
2964
2965 if (CITimeEach) {
2966 double compile_time = time.seconds();
2967 double bytes_per_sec = compile_time == 0.0 ? 0.0 : (double)(method->code_size() + task->num_inlined_bytecodes()) / compile_time;
2968 tty->print_cr("%3d seconds: %6.3f bytes/sec : %f (bytes %d + %d inlined)",
2969 compile_id, compile_time, bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2970 }
2971
2972 // Collect counts of successful compilations
2973 _sum_nmethod_size += task->nm_total_size();
2974 _sum_nmethod_code_size += task->nm_insts_size();
2975 _total_compile_count++;
2976
2977 if (UsePerfData) {
2978 _perf_sum_nmethod_size->inc( task->nm_total_size());
2979 _perf_sum_nmethod_code_size->inc(task->nm_insts_size());
2980 _perf_total_compile_count->inc();
2981 }
2982
2983 if (is_osr) {
2984 if (UsePerfData) _perf_total_osr_compile_count->inc();
2985 _total_osr_compile_count++;
2986 } else {
2987 if (UsePerfData) _perf_total_standard_compile_count->inc();
2988 _total_standard_compile_count++;
2989 }
2990 }
2991 // set the current method for the thread to null
2992 if (UsePerfData) counters->set_current_method("");
2993 }
2994
2995 const char* CompileBroker::compiler_name(int comp_level) {
2996 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2997 if (comp == nullptr) {
2998 return "no compiler";
2999 } else {
3000 return (comp->name());
3001 }
3002 }
3003
3004 jlong CompileBroker::total_compilation_ticks() {
3005 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
3006 }
3007
3008 void CompileBroker::log_not_entrant(nmethod* nm) {
3009 _total_not_entrant_count++;
3010 if (CITime || log_is_enabled(Info, init)) {
3011 CompilerStatistics* stats = nullptr;
3012 int level = nm->comp_level();
3013 if (nm->is_scc()) {
3014 if (nm->preloaded()) {
3015 assert(level == CompLevel_full_optimization, "%d", level);
3016 level = CompLevel_full_optimization + 1;
3017 }
3018 stats = &_scc_stats_per_level[level - 1];
3019 } else {
3020 stats = &_stats_per_level[level - 1];
3021 }
3022 stats->_made_not_entrant._count++;
3023 }
3024 }
3025
3026 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
3027 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}",
3028 name, stats->bytes_per_second(),
3029 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
3030 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
3031 stats->_nmethods_size, stats->_nmethods_code_size);
3032 }
3033
3034 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
3035 if (data._count > 0) {
3036 st->print("; %s: %4u methods", name, data._count);
3037 if (print_time) {
3038 st->print(" (in %.3fs)", data._time.seconds());
3039 }
3040 }
3041 }
3042
3043 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
3044 st->print(" %s%d: %5u methods", prefix, tier, stats->_standard._count);
3045 if (stats->_standard._count > 0) {
3046 st->print(" (in %.3fs)", stats->_standard._time.seconds());
3047 }
3048 print_helper(st, "osr", stats->_osr);
3049 print_helper(st, "bailout", stats->_bailout);
3050 print_helper(st, "invalid", stats->_invalidated);
3051 print_helper(st, "not_entrant", stats->_made_not_entrant, false);
3052 st->cr();
3053 }
3054
3055 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3056 if (queue != nullptr) {
3057 MutexLocker ml(queue->lock());
3058
3059 uint total_cnt = 0;
3060 uint active_cnt = 0;
3061 for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3062 guarantee(jt != nullptr, "");
3063 if (jt->is_Compiler_thread()) {
3064 CompilerThread* ct = (CompilerThread*)jt;
3065
3066 guarantee(ct != nullptr, "");
3067 if (ct->queue() == queue) {
3068 ++total_cnt;
3069 CompileTask* task = ct->task();
3070 if (task != nullptr) {
3071 ++active_cnt;
3072 }
3073 }
3074 }
3075 }
3076
3077 st->print(" %s (%d active / %d total threads): %u tasks",
3078 queue->name(), active_cnt, total_cnt, queue->size());
3079 if (queue->size() > 0) {
3080 uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3081 for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3082 int tier = task->comp_level();
3083 if (task->is_scc() && task->preload()) {
3084 assert(tier == CompLevel_full_optimization, "%d", tier);
3085 tier = CompLevel_full_optimization + 1;
3086 }
3087 counts[tier-1]++;
3088 }
3089 st->print(":");
3090 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3091 uint cnt = counts[tier-1];
3092 if (cnt > 0) {
3093 st->print(" T%d: %u tasks;", tier, cnt);
3094 }
3095 }
3096 }
3097 st->cr();
3098
3099 // for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3100 // guarantee(jt != nullptr, "");
3101 // if (jt->is_Compiler_thread()) {
3102 // CompilerThread* ct = (CompilerThread*)jt;
3103 //
3104 // guarantee(ct != nullptr, "");
3105 // if (ct->queue() == queue) {
3106 // ResourceMark rm;
3107 // CompileTask* task = ct->task();
3108 // st->print(" %s: ", ct->name_raw());
3109 // if (task != nullptr) {
3110 // task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3111 // }
3112 // st->cr();
3113 // }
3114 // }
3115 // }
3116 }
3117 }
3118 void CompileBroker::print_statistics_on(outputStream* st) {
3119 st->print_cr(" Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3120 _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3121 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3122 print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3123 }
3124 st->cr();
3125
3126 if (LoadCachedCode || StoreCachedCode) {
3127 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3128 if (tier != CompLevel_full_profile) {
3129 print_tier_helper(st, "SC T", tier, &_scc_stats_per_level[tier - 1]);
3130 }
3131 }
3132 st->cr();
3133 }
3134
3135 print_queue_info(st, _c1_compile_queue);
3136 print_queue_info(st, _c2_compile_queue);
3137 print_queue_info(st, _c3_compile_queue);
3138 print_queue_info(st, _sc1_compile_queue);
3139 print_queue_info(st, _sc2_compile_queue);
3140 }
3141
3142 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3143 if (per_compiler) {
3144 if (aggregate) {
3145 tty->cr();
3146 tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3147 tty->print_cr("------------------------------------------------");
3148 tty->cr();
3149 }
3150 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3151 AbstractCompiler* comp = _compilers[i];
3152 if (comp != nullptr) {
3153 print_times(comp->name(), comp->stats());
3154 }
3155 }
3156 if (_scc_stats._standard._count > 0) {
3157 print_times("SC", &_scc_stats);
3158 }
3159 if (aggregate) {
3160 tty->cr();
3161 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3162 tty->print_cr("------------------------------------------------");
3163 tty->cr();
3164 }
3165 char tier_name[256];
3166 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3167 CompilerStatistics* stats = &_stats_per_level[tier-1];
3168 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3169 print_times(tier_name, stats);
3170 }
3171 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3172 CompilerStatistics* stats = &_scc_stats_per_level[tier-1];
3173 if (stats->_standard._bytes > 0) {
3174 os::snprintf_checked(tier_name, sizeof(tier_name), "SC T%d", tier);
3175 print_times(tier_name, stats);
3176 }
3177 }
3178 }
3179
3180 if (!aggregate) {
3181 return;
3182 }
3183
3184 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3185 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3186 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3187
3188 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3189 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3190
3191 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3192 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3193 uint total_compile_count = CompileBroker::_total_compile_count;
3194 uint total_bailout_count = CompileBroker::_total_bailout_count;
3195 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3196
3197 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
3198 uint nmethods_size = CompileBroker::_sum_nmethod_size;
3199
3200 tty->cr();
3201 tty->print_cr("Accumulated compiler times");
3202 tty->print_cr("----------------------------------------------------------");
3203 //0000000000111111111122222222223333333333444444444455555555556666666666
3204 //0123456789012345678901234567890123456789012345678901234567890123456789
3205 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
3206 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
3207 standard_compilation.seconds(),
3208 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3209 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
3210 CompileBroker::_t_bailedout_compilation.seconds(),
3211 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3212 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
3213 osr_compilation.seconds(),
3214 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3215 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
3216 CompileBroker::_t_invalidated_compilation.seconds(),
3217 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3218
3219 if (StoreCachedCode || LoadCachedCode) { // Check flags because SC cache could be closed already
3220 tty->cr();
3221 SCCache::print_timers_on(tty);
3222 }
3223 AbstractCompiler *comp = compiler(CompLevel_simple);
3224 if (comp != nullptr) {
3225 tty->cr();
3226 comp->print_timers();
3227 }
3228 comp = compiler(CompLevel_full_optimization);
3229 if (comp != nullptr) {
3230 tty->cr();
3231 comp->print_timers();
3232 }
3233 comp = _compilers[2];
3234 if (comp != nullptr) {
3235 tty->cr();
3236 comp->print_timers();
3237 }
3238 #if INCLUDE_JVMCI
3239 if (EnableJVMCI) {
3240 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3241 if (jvmci_comp != nullptr && jvmci_comp != comp) {
3242 tty->cr();
3243 jvmci_comp->print_timers();
3244 }
3245 }
3246 #endif
3247
3248 tty->cr();
3249 tty->print_cr(" Total compiled methods : %8u methods", total_compile_count);
3250 tty->print_cr(" Standard compilation : %8u methods", standard_compile_count);
3251 tty->print_cr(" On stack replacement : %8u methods", osr_compile_count);
3252 uint tcb = osr_bytes_compiled + standard_bytes_compiled;
3253 tty->print_cr(" Total compiled bytecodes : %8u bytes", tcb);
3254 tty->print_cr(" Standard compilation : %8u bytes", standard_bytes_compiled);
3255 tty->print_cr(" On stack replacement : %8u bytes", osr_bytes_compiled);
3256 double tcs = total_compilation.seconds();
3257 uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
3258 tty->print_cr(" Average compilation speed : %8u bytes/s", bps);
3259 tty->cr();
3260 tty->print_cr(" nmethod code size : %8u bytes", nmethods_code_size);
3261 tty->print_cr(" nmethod total size : %8u bytes", nmethods_size);
3262 }
3263
3264 // Print general/accumulated JIT information.
3265 void CompileBroker::print_info(outputStream *out) {
3266 if (out == nullptr) out = tty;
3267 out->cr();
3268 out->print_cr("======================");
3269 out->print_cr(" General JIT info ");
3270 out->print_cr("======================");
3271 out->cr();
3272 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
3273 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
3274 out->cr();
3275 out->print_cr("CodeCache overview");
3276 out->print_cr("--------------------------------------------------------");
3277 out->cr();
3278 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
3279 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
3280 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
3281 out->cr();
3282 }
3283
3284 // Note: tty_lock must not be held upon entry to this function.
3285 // Print functions called from herein do "micro-locking" on tty_lock.
3286 // That's a tradeoff which keeps together important blocks of output.
3287 // At the same time, continuous tty_lock hold time is kept in check,
3288 // preventing concurrently printing threads from stalling a long time.
3289 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
3290 TimeStamp ts_total;
3291 TimeStamp ts_global;
3292 TimeStamp ts;
3293
3294 bool allFun = !strcmp(function, "all");
3295 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
3296 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
3297 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
3298 bool methodCount = !strcmp(function, "MethodCount") || allFun;
3299 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
3300 bool methodAge = !strcmp(function, "MethodAge") || allFun;
3301 bool methodNames = !strcmp(function, "MethodNames") || allFun;
3302 bool discard = !strcmp(function, "discard") || allFun;
3303
3304 if (out == nullptr) {
3305 out = tty;
3306 }
3307
3308 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
3309 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
3310 out->cr();
3311 return;
3312 }
3313
3314 ts_total.update(); // record starting point
3315
3316 if (aggregate) {
3317 print_info(out);
3318 }
3319
3320 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
3321 // That prevents other threads from destroying (making inconsistent) our view on the CodeHeap.
3322 // When we request individual parts of the analysis via the jcmd interface, it is possible
3323 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
3324 // updated the aggregated data. We will then see a modified, but again consistent, view
3325 // on the CodeHeap. That's a tolerable tradeoff we have to accept because we can't hold
3326 // a lock across user interaction.
3327
3328 // We should definitely acquire this lock before acquiring Compile_lock and CodeCache_lock.
3329 // CodeHeapStateAnalytics_lock may be held by a concurrent thread for a long time,
3330 // leading to an unnecessarily long hold time of the other locks we acquired before.
3331 ts.update(); // record starting point
3332 MutexLocker mu0(CodeHeapStateAnalytics_lock, Mutex::_safepoint_check_flag);
3333 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
3334
3335 // Holding the CodeCache_lock protects from concurrent alterations of the CodeCache.
3336 // Unfortunately, such protection is not sufficient:
3337 // When a new nmethod is created via ciEnv::register_method(), the
3338 // Compile_lock is taken first. After some initializations,
3339 // nmethod::new_nmethod() takes over, grabbing the CodeCache_lock
3340 // immediately (after finalizing the oop references). To lock out concurrent
3341 // modifiers, we have to grab both locks as well in the described sequence.
3342 //
3343 // If we serve an "allFun" call, it is beneficial to hold CodeCache_lock and Compile_lock
3344 // for the entire duration of aggregation and printing. That makes sure we see
3345 // a consistent picture and do not run into issues caused by concurrent alterations.
3346 bool should_take_Compile_lock = !SafepointSynchronize::is_at_safepoint() &&
3347 !Compile_lock->owned_by_self();
3348 bool should_take_CodeCache_lock = !SafepointSynchronize::is_at_safepoint() &&
3349 !CodeCache_lock->owned_by_self();
3350 bool take_global_lock_1 = allFun && should_take_Compile_lock;
3351 bool take_global_lock_2 = allFun && should_take_CodeCache_lock;
3352 bool take_function_lock_1 = !allFun && should_take_Compile_lock;
3353 bool take_function_lock_2 = !allFun && should_take_CodeCache_lock;
3354 bool take_global_locks = take_global_lock_1 || take_global_lock_2;
3355 bool take_function_locks = take_function_lock_1 || take_function_lock_2;
3356
3357 ts_global.update(); // record starting point
3358
3359 ConditionalMutexLocker mu1(Compile_lock, take_global_lock_1, Mutex::_safepoint_check_flag);
3360 ConditionalMutexLocker mu2(CodeCache_lock, take_global_lock_2, Mutex::_no_safepoint_check_flag);
3361 if (take_global_locks) {
3362 out->print_cr("\n__ Compile & CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
3363 ts_global.update(); // record starting point
3364 }
3365
3366 if (aggregate) {
3367 ts.update(); // record starting point
3368 ConditionalMutexLocker mu11(Compile_lock, take_function_lock_1, Mutex::_safepoint_check_flag);
3369 ConditionalMutexLocker mu22(CodeCache_lock, take_function_lock_2, Mutex::_no_safepoint_check_flag);
3370 if (take_function_locks) {
3371 out->print_cr("\n__ Compile & CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
3372 }
3373
3374 ts.update(); // record starting point
3375 CodeCache::aggregate(out, granularity);
3376 if (take_function_locks) {
3377 out->print_cr("\n__ Compile & CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
3378 }
3379 }
3380
3381 if (usedSpace) CodeCache::print_usedSpace(out);
3382 if (freeSpace) CodeCache::print_freeSpace(out);
3383 if (methodCount) CodeCache::print_count(out);
3384 if (methodSpace) CodeCache::print_space(out);
3385 if (methodAge) CodeCache::print_age(out);
3386 if (methodNames) {
3387 if (allFun) {
3388 // print_names() can only be used safely if the locks have been continuously held
3389 // since aggregation begin. That is true only for function "all".
3390 CodeCache::print_names(out);
3391 } else {
3392 out->print_cr("\nCodeHeapStateAnalytics: Function 'MethodNames' is only available as part of function 'all'");
3393 }
3394 }
3395 if (discard) CodeCache::discard(out);
3396
3397 if (take_global_locks) {
3398 out->print_cr("\n__ Compile & CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
3399 }
3400 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
3401 }