5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/cdsConfig.hpp"
26 #include "classfile/javaClasses.inline.hpp"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/vmClasses.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/codeHeapState.hpp"
32 #include "code/dependencyContext.hpp"
33 #include "compiler/compilationLog.hpp"
34 #include "compiler/compilationMemoryStatistic.hpp"
35 #include "compiler/compilationPolicy.hpp"
36 #include "compiler/compileBroker.hpp"
37 #include "compiler/compileLog.hpp"
38 #include "compiler/compilerEvent.hpp"
39 #include "compiler/compilerOracle.hpp"
40 #include "compiler/directivesParser.hpp"
41 #include "gc/shared/memAllocator.hpp"
42 #include "interpreter/linkResolver.hpp"
43 #include "jfr/jfrEvents.hpp"
44 #include "jvm.h"
45 #include "logging/log.hpp"
46 #include "logging/logStream.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/method.inline.hpp"
51 #include "oops/methodData.hpp"
52 #include "oops/oop.inline.hpp"
53 #include "prims/jvmtiExport.hpp"
54 #include "prims/nativeLookup.hpp"
55 #include "prims/whitebox.hpp"
56 #include "runtime/atomicAccess.hpp"
57 #include "runtime/escapeBarrier.hpp"
58 #include "runtime/globals_extension.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/init.hpp"
61 #include "runtime/interfaceSupport.inline.hpp"
62 #include "runtime/java.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/jniHandles.inline.hpp"
65 #include "runtime/os.hpp"
66 #include "runtime/perfData.hpp"
67 #include "runtime/safepointVerifiers.hpp"
68 #include "runtime/sharedRuntime.hpp"
69 #include "runtime/threads.hpp"
70 #include "runtime/threadSMR.hpp"
71 #include "runtime/timerTrace.hpp"
72 #include "runtime/vframe.inline.hpp"
73 #include "utilities/debug.hpp"
74 #include "utilities/dtrace.hpp"
75 #include "utilities/events.hpp"
76 #include "utilities/formatBuffer.hpp"
77 #include "utilities/macros.hpp"
78 #ifdef COMPILER1
79 #include "c1/c1_Compiler.hpp"
80 #endif
81 #ifdef COMPILER2
82 #include "opto/c2compiler.hpp"
83 #endif
84 #if INCLUDE_JVMCI
85 #include "jvmci/jvmciEnv.hpp"
86 #include "jvmci/jvmciRuntime.hpp"
87 #endif
88
89 #ifdef DTRACE_ENABLED
90
91 // Only bother with this argument setup if dtrace is available
92
93 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
94 { \
95 Symbol* klass_name = (method)->klass_name(); \
96 Symbol* name = (method)->name(); \
97 Symbol* signature = (method)->signature(); \
115 }
116
117 #else // ndef DTRACE_ENABLED
118
119 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
120 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
121
122 #endif // ndef DTRACE_ENABLED
123
124 bool CompileBroker::_initialized = false;
125 volatile bool CompileBroker::_should_block = false;
126 volatile int CompileBroker::_print_compilation_warning = 0;
127 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
128
129 // The installed compiler(s)
130 AbstractCompiler* CompileBroker::_compilers[2];
131
132 // The maximum numbers of compiler threads to be determined during startup.
133 int CompileBroker::_c1_count = 0;
134 int CompileBroker::_c2_count = 0;
135
136 // An array of compiler names as Java String objects
137 jobject* CompileBroker::_compiler1_objects = nullptr;
138 jobject* CompileBroker::_compiler2_objects = nullptr;
139
140 CompileLog** CompileBroker::_compiler1_logs = nullptr;
141 CompileLog** CompileBroker::_compiler2_logs = nullptr;
142
143 // These counters are used to assign an unique ID to each compilation.
144 volatile jint CompileBroker::_compilation_id = 0;
145 volatile jint CompileBroker::_osr_compilation_id = 0;
146 volatile jint CompileBroker::_native_compilation_id = 0;
147
148 // Performance counters
149 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
150 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
151 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
152
153 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
154 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
155 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
156 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
157 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
158
159 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
160 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
161 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
162 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
163
164 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
165 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
166 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
167 PerfVariable* CompileBroker::_perf_last_compile_type = nullptr;
168 PerfVariable* CompileBroker::_perf_last_compile_size = nullptr;
169 PerfVariable* CompileBroker::_perf_last_failed_type = nullptr;
170 PerfVariable* CompileBroker::_perf_last_invalidated_type = nullptr;
171
172 // Timers and counters for generating statistics
173 elapsedTimer CompileBroker::_t_total_compilation;
174 elapsedTimer CompileBroker::_t_osr_compilation;
175 elapsedTimer CompileBroker::_t_standard_compilation;
176 elapsedTimer CompileBroker::_t_invalidated_compilation;
177 elapsedTimer CompileBroker::_t_bailedout_compilation;
178
179 uint CompileBroker::_total_bailout_count = 0;
180 uint CompileBroker::_total_invalidated_count = 0;
181 uint CompileBroker::_total_compile_count = 0;
182 uint CompileBroker::_total_osr_compile_count = 0;
183 uint CompileBroker::_total_standard_compile_count = 0;
184 uint CompileBroker::_total_compiler_stopped_count = 0;
185 uint CompileBroker::_total_compiler_restarted_count = 0;
186
187 uint CompileBroker::_sum_osr_bytes_compiled = 0;
188 uint CompileBroker::_sum_standard_bytes_compiled = 0;
189 uint CompileBroker::_sum_nmethod_size = 0;
190 uint CompileBroker::_sum_nmethod_code_size = 0;
191
192 jlong CompileBroker::_peak_compilation_time = 0;
193
194 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
195
196 CompileQueue* CompileBroker::_c2_compile_queue = nullptr;
197 CompileQueue* CompileBroker::_c1_compile_queue = nullptr;
198
199 bool compileBroker_init() {
200 if (LogEvents) {
201 CompilationLog::init();
202 }
203
204 // init directives stack, adding default directive
205 DirectivesStack::init();
206
207 if (DirectivesParser::has_file()) {
208 return DirectivesParser::parse_from_flag();
209 } else if (CompilerDirectivesPrint) {
210 // Print default directive even when no other was added
211 DirectivesStack::print(tty);
212 }
213
214 return true;
215 }
216
217 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
218 CompilerThread* thread = CompilerThread::current();
219 thread->set_task(task);
220 CompileLog* log = thread->log();
221 thread->timeout()->arm();
222 if (log != nullptr && !task->is_unloaded()) task->log_task_start(log);
223 }
224
225 CompileTaskWrapper::~CompileTaskWrapper() {
226 CompilerThread* thread = CompilerThread::current();
227
228 // First, disarm the timeout. This still relies on the underlying task.
229 thread->timeout()->disarm();
230
231 CompileTask* task = thread->task();
232 CompileLog* log = thread->log();
233 if (log != nullptr && !task->is_unloaded()) task->log_task_done(log);
234 thread->set_task(nullptr);
235 thread->set_env(nullptr);
236 if (task->is_blocking()) {
237 bool free_task = false;
238 {
239 MutexLocker notifier(thread, CompileTaskWait_lock);
240 task->mark_complete();
241 #if INCLUDE_JVMCI
242 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
243 if (!task->has_waiter()) {
244 // The waiting thread timed out and thus did not delete the task.
245 free_task = true;
246 }
247 task->set_blocking_jvmci_compile_state(nullptr);
248 }
249 #endif
250 if (!free_task) {
251 // Notify the waiting thread that the compilation has completed
252 // so that it can free the task.
253 CompileTaskWait_lock->notify_all();
254 }
255 }
256 if (free_task) {
257 // The task can only be deleted once the task lock is released.
258 delete task;
259 }
260 } else {
261 task->mark_complete();
262
263 // By convention, the compiling thread is responsible for deleting
264 // a non-blocking CompileTask.
265 delete task;
266 }
267 }
268
269 /**
270 * Check if a CompilerThread can be removed and update count if requested.
271 */
272 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
273 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
274 if (!ReduceNumberOfCompilerThreads) return false;
275
276 AbstractCompiler *compiler = ct->compiler();
277 int compiler_count = compiler->num_compiler_threads();
278 bool c1 = compiler->is_c1();
279
280 // Keep at least 1 compiler thread of each type.
281 if (compiler_count < 2) return false;
282
283 // Keep thread alive for at least some time.
284 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
285
286 #if INCLUDE_JVMCI
287 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
288 // Handles for JVMCI thread objects may get released concurrently.
289 if (do_it) {
290 assert(CompileThread_lock->owner() == ct, "must be holding lock");
291 } else {
292 // Skip check if it's the last thread and let caller check again.
293 return true;
294 }
295 }
302 if (do_it) {
303 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
304 compiler->set_num_compiler_threads(compiler_count - 1);
305 #if INCLUDE_JVMCI
306 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
307 // Old j.l.Thread object can die when no longer referenced elsewhere.
308 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
309 _compiler2_objects[compiler_count - 1] = nullptr;
310 }
311 #endif
312 }
313 return true;
314 }
315 return false;
316 }
317
318 /**
319 * Add a CompileTask to a CompileQueue.
320 */
321 void CompileQueue::add(CompileTask* task) {
322 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
323
324 task->set_next(nullptr);
325 task->set_prev(nullptr);
326
327 if (_last == nullptr) {
328 // The compile queue is empty.
329 assert(_first == nullptr, "queue is empty");
330 _first = task;
331 _last = task;
332 } else {
333 // Append the task to the queue.
334 assert(_last->next() == nullptr, "not last");
335 _last->set_next(task);
336 task->set_prev(_last);
337 _last = task;
338 }
339 ++_size;
340 ++_total_added;
341 if (_size > _peak_size) {
342 _peak_size = _size;
343 }
344
345 // Mark the method as being in the compile queue.
346 task->method()->set_queued_for_compilation();
347
348 if (CIPrintCompileQueue) {
349 print_tty();
350 }
351
352 if (LogCompilation && xtty != nullptr) {
353 task->log_task_queued();
354 }
355
356 if (TrainingData::need_data() && !CDSConfig::is_dumping_final_static_archive()) {
357 CompileTrainingData* ctd = CompileTrainingData::make(task);
358 if (ctd != nullptr) {
359 task->set_training_data(ctd);
360 }
361 }
362
363 // Notify CompilerThreads that a task is available.
364 MethodCompileQueue_lock->notify_all();
365 }
366
367 /**
368 * Empties compilation queue by deleting all compilation tasks.
369 * Furthermore, the method wakes up all threads that are waiting
370 * on a compilation task to finish. This can happen if background
371 * compilation is disabled.
372 */
373 void CompileQueue::delete_all() {
374 MutexLocker mu(MethodCompileQueue_lock);
375 CompileTask* current = _first;
376
377 // Iterate over all tasks in the compile queue
378 while (current != nullptr) {
379 CompileTask* next = current->next();
380 if (!current->is_blocking()) {
381 // Non-blocking task. No one is waiting for it, delete it now.
382 delete current;
383 } else {
384 // Blocking task. By convention, it is the waiters responsibility
385 // to delete the task. We cannot delete it here, because we do not
386 // coordinate with waiters. We will notify the waiters later.
387 }
388 current = next;
389 }
390 _first = nullptr;
391 _last = nullptr;
392
393 // Wake up all blocking task waiters to deal with remaining blocking
394 // tasks. This is not a performance sensitive path, so we do this
395 // unconditionally to simplify coding/testing.
396 {
397 MonitorLocker ml(Thread::current(), CompileTaskWait_lock);
398 ml.notify_all();
399 }
400
401 // Wake up all threads that block on the queue.
402 MethodCompileQueue_lock->notify_all();
403 }
404
405 /**
406 * Get the next CompileTask from a CompileQueue
407 */
408 CompileTask* CompileQueue::get(CompilerThread* thread) {
409 // save methods from RedefineClasses across safepoint
410 // across MethodCompileQueue_lock below.
411 methodHandle save_method;
412
413 MonitorLocker locker(MethodCompileQueue_lock);
414 // If _first is null we have no more compile jobs. There are two reasons for
415 // having no compile jobs: First, we compiled everything we wanted. Second,
416 // we ran out of code cache so compilation has been disabled. In the latter
417 // case we perform code cache sweeps to free memory such that we can re-enable
418 // compilation.
419 while (_first == nullptr) {
420 // Exit loop if compilation is disabled forever
421 if (CompileBroker::is_compilation_disabled_forever()) {
422 return nullptr;
423 }
424
425 AbstractCompiler* compiler = thread->compiler();
426 guarantee(compiler != nullptr, "Compiler object must exist");
427 compiler->on_empty_queue(this, thread);
428 if (_first != nullptr) {
429 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
430 // so check again whether any tasks were added to the queue.
431 break;
432 }
433
434 // If there are no compilation tasks and we can compile new jobs
435 // (i.e., there is enough free space in the code cache) there is
436 // no need to invoke the GC.
437 // We need a timed wait here, since compiler threads can exit if compilation
438 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
439 // is not critical and we do not want idle compiler threads to wake up too often.
440 locker.wait(5*1000);
441
442 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
443 // Still nothing to compile. Give caller a chance to stop this thread.
444 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
445 }
446 }
447
448 if (CompileBroker::is_compilation_disabled_forever()) {
449 return nullptr;
450 }
451
452 CompileTask* task;
453 {
454 NoSafepointVerifier nsv;
455 task = CompilationPolicy::select_task(this, thread);
456 if (task != nullptr) {
457 task = task->select_for_compilation();
458 }
459 }
460
461 if (task != nullptr) {
462 // Save method pointers across unlock safepoint. The task is removed from
463 // the compilation queue, which is walked during RedefineClasses.
464 Thread* thread = Thread::current();
465 save_method = methodHandle(thread, task->method());
466
467 remove(task);
468 }
469 purge_stale_tasks(); // may temporarily release MCQ lock
470 return task;
471 }
472
473 // Clean & deallocate stale compile tasks.
474 // Temporarily releases MethodCompileQueue lock.
475 void CompileQueue::purge_stale_tasks() {
476 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
477 if (_first_stale != nullptr) {
478 // Stale tasks are purged when MCQ lock is released,
479 // but _first_stale updates are protected by MCQ lock.
480 // Once task processing starts and MCQ lock is released,
481 // other compiler threads can reuse _first_stale.
482 CompileTask* head = _first_stale;
483 _first_stale = nullptr;
484 {
485 MutexUnlocker ul(MethodCompileQueue_lock);
486 for (CompileTask* task = head; task != nullptr; ) {
487 CompileTask* next_task = task->next();
488 task->set_next(nullptr);
489 CompileTaskWrapper ctw(task); // Frees the task
490 task->set_failure_reason("stale task");
491 task = next_task;
492 }
493 }
494 }
495 }
496
497 void CompileQueue::remove(CompileTask* task) {
498 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
499 if (task->prev() != nullptr) {
500 task->prev()->set_next(task->next());
501 } else {
502 // max is the first element
503 assert(task == _first, "Sanity");
504 _first = task->next();
505 }
506
507 if (task->next() != nullptr) {
508 task->next()->set_prev(task->prev());
509 } else {
510 // max is the last element
511 assert(task == _last, "Sanity");
512 _last = task->prev();
513 }
514 task->set_next(nullptr);
515 task->set_prev(nullptr);
516 --_size;
517 ++_total_removed;
518 }
519
520 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
521 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
522 remove(task);
523
524 // Enqueue the task for reclamation (should be done outside MCQ lock)
525 task->set_next(_first_stale);
526 task->set_prev(nullptr);
527 _first_stale = task;
528 }
529
530 // methods in the compile queue need to be marked as used on the stack
531 // so that they don't get reclaimed by Redefine Classes
532 void CompileQueue::mark_on_stack() {
533 CompileTask* task = _first;
534 while (task != nullptr) {
535 task->mark_on_stack();
536 task = task->next();
537 }
538 }
539
540
541 CompileQueue* CompileBroker::compile_queue(int comp_level) {
542 if (is_c2_compile(comp_level)) return _c2_compile_queue;
543 if (is_c1_compile(comp_level)) return _c1_compile_queue;
544 return nullptr;
545 }
546
547 CompileQueue* CompileBroker::c1_compile_queue() {
548 return _c1_compile_queue;
549 }
550
551 CompileQueue* CompileBroker::c2_compile_queue() {
552 return _c2_compile_queue;
553 }
554
555 void CompileBroker::print_compile_queues(outputStream* st) {
556 st->print_cr("Current compiles: ");
557
558 char buf[2000];
559 int buflen = sizeof(buf);
560 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
561
562 st->cr();
563 if (_c1_compile_queue != nullptr) {
564 _c1_compile_queue->print(st);
565 }
566 if (_c2_compile_queue != nullptr) {
567 _c2_compile_queue->print(st);
568 }
569 }
570
571 void CompileQueue::print(outputStream* st) {
572 assert_locked_or_safepoint(MethodCompileQueue_lock);
573 st->print_cr("%s:", name());
574 CompileTask* task = _first;
575 if (task == nullptr) {
576 st->print_cr("Empty");
577 } else {
578 while (task != nullptr) {
579 task->print(st, nullptr, true, true);
580 task = task->next();
581 }
582 }
583 st->cr();
584 }
585
586 void CompileQueue::print_tty() {
587 stringStream ss;
588 // Dump the compile queue into a buffer before locking the tty
589 print(&ss);
590 {
591 ttyLocker ttyl;
592 tty->print("%s", ss.freeze());
619 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
620 }
621 first_registration = false;
622 #endif // COMPILER2
623 }
624 }
625 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
626
627 // ------------------------------------------------------------------
628 // CompileBroker::compilation_init
629 //
630 // Initialize the Compilation object
631 void CompileBroker::compilation_init(JavaThread* THREAD) {
632 // No need to initialize compilation system if we do not use it.
633 if (!UseCompiler) {
634 return;
635 }
636 // Set the interface to the current compiler(s).
637 _c1_count = CompilationPolicy::c1_count();
638 _c2_count = CompilationPolicy::c2_count();
639
640 #if INCLUDE_JVMCI
641 if (EnableJVMCI) {
642 // This is creating a JVMCICompiler singleton.
643 JVMCICompiler* jvmci = new JVMCICompiler();
644
645 if (UseJVMCICompiler) {
646 _compilers[1] = jvmci;
647 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
648 if (BootstrapJVMCI) {
649 // JVMCI will bootstrap so give it more threads
650 _c2_count = MIN2(32, os::active_processor_count());
651 }
652 } else {
653 _c2_count = JVMCIThreads;
654 }
655 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
656 } else {
657 #ifdef COMPILER1
658 _c1_count = JVMCIHostThreads;
775 _perf_last_compile_size =
776 PerfDataManager::create_variable(SUN_CI, "lastSize",
777 PerfData::U_Bytes,
778 (jlong)CompileBroker::no_compile,
779 CHECK);
780
781
782 _perf_last_failed_type =
783 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
784 PerfData::U_None,
785 (jlong)CompileBroker::no_compile,
786 CHECK);
787
788 _perf_last_invalidated_type =
789 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
790 PerfData::U_None,
791 (jlong)CompileBroker::no_compile,
792 CHECK);
793 }
794
795 _initialized = true;
796 }
797
798 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
799 CompilationPolicy::replay_training_at_init_loop(thread);
800 }
801
802 #if defined(ASSERT) && COMPILER2_OR_JVMCI
803 // Entry for DeoptimizeObjectsALotThread. The threads are started in
804 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
805 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
806 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
807 bool enter_single_loop;
808 {
809 MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
810 static int single_thread_count = 0;
811 enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
812 }
813 if (enter_single_loop) {
814 dt->deoptimize_objects_alot_loop_single();
815 } else {
816 dt->deoptimize_objects_alot_loop_all();
817 }
941 }
942
943 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
944 char name_buffer[256];
945 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
946 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
947 return JNIHandles::make_global(thread_oop);
948 }
949
950 static void print_compiler_threads(stringStream& msg) {
951 if (TraceCompilerThreads) {
952 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
953 }
954 LogTarget(Debug, jit, thread) lt;
955 if (lt.is_enabled()) {
956 LogStream ls(lt);
957 ls.print_cr("%s", msg.as_string());
958 }
959 }
960
961 void CompileBroker::init_compiler_threads() {
962 // Ensure any exceptions lead to vm_exit_during_initialization.
963 EXCEPTION_MARK;
964 #if !defined(ZERO)
965 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
966 #endif // !ZERO
967 // Initialize the compilation queue
968 if (_c2_count > 0) {
969 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
970 _c2_compile_queue = new CompileQueue(name);
971 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
972 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
973 }
974 if (_c1_count > 0) {
975 _c1_compile_queue = new CompileQueue("C1 compile queue");
976 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
977 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
978 }
979
980 for (int i = 0; i < _c2_count; i++) {
981 // Create a name for our thread.
982 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
983 _compiler2_objects[i] = thread_handle;
984 _compiler2_logs[i] = nullptr;
985
986 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
987 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
988 assert(ct != nullptr, "should have been handled for initial thread");
989 _compilers[1]->set_num_compiler_threads(i + 1);
990 if (trace_compiler_threads()) {
991 ResourceMark rm;
992 ThreadsListHandle tlh; // name() depends on the TLH.
993 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
994 stringStream msg;
995 msg.print("Added initial compiler thread %s", ct->name());
996 print_compiler_threads(msg);
997 }
998 }
999 }
1000
1001 for (int i = 0; i < _c1_count; i++) {
1002 // Create a name for our thread.
1003 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1004 _compiler1_objects[i] = thread_handle;
1005 _compiler1_logs[i] = nullptr;
1006
1007 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1008 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1009 assert(ct != nullptr, "should have been handled for initial thread");
1010 _compilers[0]->set_num_compiler_threads(i + 1);
1011 if (trace_compiler_threads()) {
1012 ResourceMark rm;
1013 ThreadsListHandle tlh; // name() depends on the TLH.
1014 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1015 stringStream msg;
1016 msg.print("Added initial compiler thread %s", ct->name());
1017 print_compiler_threads(msg);
1018 }
1019 }
1020 }
1021
1022 if (UsePerfData) {
1023 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
1024 }
1025
1026 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1027 if (DeoptimizeObjectsALot) {
1028 // Initialize and start the object deoptimizer threads
1029 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1030 for (int count = 0; count < total_count; count++) {
1031 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1032 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1033 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1034 }
1035 }
1036 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1037 }
1038
1039 void CompileBroker::init_training_replay() {
1040 // Ensure any exceptions lead to vm_exit_during_initialization.
1041 EXCEPTION_MARK;
1042 if (TrainingData::have_data()) {
1043 Handle thread_oop = JavaThread::create_system_thread_object("Training replay thread", CHECK);
1044 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1045 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1046 }
1047 }
1048
1049 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1050
1051 int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1052 const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1053
1054 // Quick check if we already have enough compiler threads without taking the lock.
1055 // Numbers may change concurrently, so we read them again after we have the lock.
1056 if (_c2_compile_queue != nullptr) {
1057 old_c2_count = get_c2_thread_count();
1058 new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1059 }
1060 if (_c1_compile_queue != nullptr) {
1061 old_c1_count = get_c1_thread_count();
1062 new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1063 }
1159 }
1160
1161 CompileThread_lock->unlock();
1162 }
1163
1164
1165 /**
1166 * Set the methods on the stack as on_stack so that redefine classes doesn't
1167 * reclaim them. This method is executed at a safepoint.
1168 */
1169 void CompileBroker::mark_on_stack() {
1170 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1171 // Since we are at a safepoint, we do not need a lock to access
1172 // the compile queues.
1173 if (_c2_compile_queue != nullptr) {
1174 _c2_compile_queue->mark_on_stack();
1175 }
1176 if (_c1_compile_queue != nullptr) {
1177 _c1_compile_queue->mark_on_stack();
1178 }
1179 }
1180
1181 // ------------------------------------------------------------------
1182 // CompileBroker::compile_method
1183 //
1184 // Request compilation of a method.
1185 void CompileBroker::compile_method_base(const methodHandle& method,
1186 int osr_bci,
1187 int comp_level,
1188 int hot_count,
1189 CompileTask::CompileReason compile_reason,
1190 bool blocking,
1191 Thread* thread) {
1192 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1193 assert(method->method_holder()->is_instance_klass(),
1194 "sanity check");
1195 assert(!method->method_holder()->is_not_initialized(),
1196 "method holder must be initialized");
1197 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1198
1199 if (CIPrintRequests) {
1200 tty->print("request: ");
1201 method->print_short_name(tty);
1202 if (osr_bci != InvocationEntryBci) {
1203 tty->print(" osr_bci: %d", osr_bci);
1204 }
1205 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1206 if (hot_count > 0) {
1207 tty->print(" hot: yes");
1208 }
1209 tty->cr();
1210 }
1211
1212 // A request has been made for compilation. Before we do any
1213 // real work, check to see if the method has been compiled
1214 // in the meantime with a definitive result.
1215 if (compilation_is_complete(method, osr_bci, comp_level)) {
1216 return;
1217 }
1218
1219 #ifndef PRODUCT
1220 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1221 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1222 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1223 return;
1224 }
1225 }
1226 #endif
1227
1228 // If this method is already in the compile queue, then
1229 // we do not block the current thread.
1230 if (compilation_is_in_queue(method)) {
1231 // We may want to decay our counter a bit here to prevent
1232 // multiple denied requests for compilation. This is an
1233 // open compilation policy issue. Note: The other possibility,
1234 // in the case that this is a blocking compile request, is to have
1235 // all subsequent blocking requesters wait for completion of
1236 // ongoing compiles. Note that in this case we'll need a protocol
1237 // for freeing the associated compile tasks. [Or we could have
1238 // a single static monitor on which all these waiters sleep.]
1239 return;
1240 }
1241
1242 // Tiered policy requires MethodCounters to exist before adding a method to
1243 // the queue. Create if we don't have them yet.
1244 method->get_method_counters(thread);
1245
1246 // Outputs from the following MutexLocker block:
1247 CompileTask* task = nullptr;
1248 CompileQueue* queue = compile_queue(comp_level);
1249
1250 // Acquire our lock.
1251 {
1252 MutexLocker locker(thread, MethodCompileQueue_lock);
1253
1254 // Make sure the method has not slipped into the queues since
1255 // last we checked; note that those checks were "fast bail-outs".
1256 // Here we need to be more careful, see 14012000 below.
1257 if (compilation_is_in_queue(method)) {
1258 return;
1259 }
1260
1261 // We need to check again to see if the compilation has
1262 // completed. A previous compilation may have registered
1263 // some result.
1264 if (compilation_is_complete(method, osr_bci, comp_level)) {
1265 return;
1266 }
1267
1268 // We now know that this compilation is not pending, complete,
1269 // or prohibited. Assign a compile_id to this compilation
1270 // and check to see if it is in our [Start..Stop) range.
1271 int compile_id = assign_compile_id(method, osr_bci);
1272 if (compile_id == 0) {
1273 // The compilation falls outside the allowed range.
1274 return;
1275 }
1276
1277 #if INCLUDE_JVMCI
1278 if (UseJVMCICompiler && blocking) {
1279 // Don't allow blocking compiles for requests triggered by JVMCI.
1280 if (thread->is_Compiler_thread()) {
1281 blocking = false;
1282 }
1283
1284 // In libjvmci, JVMCI initialization should not deadlock with other threads
1334 // <RESULT, QUEUE> :
1335 // <0, 1> : in compile queue, but not yet compiled
1336 // <1, 1> : compiled but queue bit not cleared
1337 // <1, 0> : compiled and queue bit cleared
1338 // Because we first check the queue bits then check the result bits,
1339 // we are assured that we cannot introduce a duplicate task.
1340 // Note that if we did the tests in the reverse order (i.e. check
1341 // result then check queued bit), we could get the result bit before
1342 // the compilation completed, and the queue bit after the compilation
1343 // completed, and end up introducing a "duplicate" (redundant) task.
1344 // In that case, the compiler thread should first check if a method
1345 // has already been compiled before trying to compile it.
1346 // NOTE: in the event that there are multiple compiler threads and
1347 // there is de-optimization/recompilation, things will get hairy,
1348 // and in that case it's best to protect both the testing (here) of
1349 // these bits, and their updating (here and elsewhere) under a
1350 // common lock.
1351 task = create_compile_task(queue,
1352 compile_id, method,
1353 osr_bci, comp_level,
1354 hot_count, compile_reason,
1355 blocking);
1356 }
1357
1358 if (blocking) {
1359 wait_for_completion(task);
1360 }
1361 }
1362
1363 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1364 int comp_level,
1365 int hot_count,
1366 CompileTask::CompileReason compile_reason,
1367 TRAPS) {
1368 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1369 if (!_initialized || comp_level == CompLevel_none) {
1370 return nullptr;
1371 }
1372
1373 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1374 assert(comp != nullptr, "Ensure we have a compiler");
1375
1376 #if INCLUDE_JVMCI
1377 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1378 // JVMCI compilation is not yet initializable.
1379 return nullptr;
1380 }
1381 #endif
1382
1383 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1384 // CompileBroker::compile_method can trap and can have pending async exception.
1385 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_count, compile_reason, directive, THREAD);
1386 DirectivesStack::release(directive);
1387 return nm;
1388 }
1389
1390 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1391 int comp_level,
1392 int hot_count,
1393 CompileTask::CompileReason compile_reason,
1394 DirectiveSet* directive,
1395 TRAPS) {
1396
1397 // make sure arguments make sense
1398 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1399 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1400 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1401 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1402 // return quickly if possible
1403
1404 // lock, make sure that the compilation
1405 // isn't prohibited in a straightforward way.
1406 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1407 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1408 return nullptr;
1409 }
1410
1411 if (osr_bci == InvocationEntryBci) {
1412 // standard compilation
1413 nmethod* method_code = method->code();
1414 if (method_code != nullptr) {
1415 if (compilation_is_complete(method, osr_bci, comp_level)) {
1416 return method_code;
1417 }
1418 }
1419 if (method->is_not_compilable(comp_level)) {
1420 return nullptr;
1421 }
1422 } else {
1423 // osr compilation
1424 // We accept a higher level osr method
1425 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1426 if (nm != nullptr) return nm;
1427 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1428 }
1429
1430 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1431 // some prerequisites that are compiler specific
1432 if (comp->is_c2() || comp->is_jvmci()) {
1433 InternalOOMEMark iom(THREAD);
1434 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1435 // Resolve all classes seen in the signature of the method
1436 // we are compiling.
1437 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1438 }
1439
1440 // If the method is native, do the lookup in the thread requesting
1441 // the compilation. Native lookups can load code, which is not
1442 // permitted during compilation.
1443 //
1444 // Note: A native method implies non-osr compilation which is
1445 // checked with an assertion at the entry of this method.
1446 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1447 address adr = NativeLookup::lookup(method, THREAD);
1448 if (HAS_PENDING_EXCEPTION) {
1449 // In case of an exception looking up the method, we just forget
1450 // about it. The interpreter will kick-in and throw the exception.
1451 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1452 CLEAR_PENDING_EXCEPTION;
1467 }
1468
1469 // do the compilation
1470 if (method->is_native()) {
1471 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1472 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1473 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1474 //
1475 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1476 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1477 AdapterHandlerLibrary::create_native_wrapper(method);
1478 } else {
1479 return nullptr;
1480 }
1481 } else {
1482 // If the compiler is shut off due to code cache getting full
1483 // fail out now so blocking compiles dont hang the java thread
1484 if (!should_compile_new_jobs()) {
1485 return nullptr;
1486 }
1487 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1488 compile_method_base(method, osr_bci, comp_level, hot_count, compile_reason, is_blocking, THREAD);
1489 }
1490
1491 // return requested nmethod
1492 // We accept a higher level osr method
1493 if (osr_bci == InvocationEntryBci) {
1494 return method->code();
1495 }
1496 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1497 }
1498
1499
1500 // ------------------------------------------------------------------
1501 // CompileBroker::compilation_is_complete
1502 //
1503 // See if compilation of this method is already complete.
1504 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1505 int osr_bci,
1506 int comp_level) {
1507 bool is_osr = (osr_bci != standard_entry_bci);
1508 if (is_osr) {
1509 if (method->is_not_osr_compilable(comp_level)) {
1510 return true;
1511 } else {
1512 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1513 return (result != nullptr);
1514 }
1515 } else {
1516 if (method->is_not_compilable(comp_level)) {
1517 return true;
1518 } else {
1519 nmethod* result = method->code();
1520 if (result == nullptr) return false;
1521 return comp_level == result->comp_level();
1522 }
1523 }
1524 }
1525
1526
1527 /**
1528 * See if this compilation is already requested.
1529 *
1530 * Implementation note: there is only a single "is in queue" bit
1531 * for each method. This means that the check below is overly
1532 * conservative in the sense that an osr compilation in the queue
1533 * will block a normal compilation from entering the queue (and vice
1534 * versa). This can be remedied by a full queue search to disambiguate
1535 * cases. If it is deemed profitable, this may be done.
1536 */
1537 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1538 return method->queued_for_compilation();
1539 }
1540
1541 // ------------------------------------------------------------------
1601 if (CIStart <= id && id < CIStop) {
1602 return id;
1603 }
1604 }
1605
1606 // Method was not in the appropriate compilation range.
1607 method->set_not_compilable_quietly("Not in requested compile id range");
1608 return 0;
1609 #else
1610 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1611 // only _compilation_id is incremented.
1612 return AtomicAccess::add(&_compilation_id, 1);
1613 #endif
1614 }
1615
1616 // ------------------------------------------------------------------
1617 // CompileBroker::assign_compile_id_unlocked
1618 //
1619 // Public wrapper for assign_compile_id that acquires the needed locks
1620 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1621 MutexLocker locker(thread, MethodCompileQueue_lock);
1622 return assign_compile_id(method, osr_bci);
1623 }
1624
1625 // ------------------------------------------------------------------
1626 // CompileBroker::create_compile_task
1627 //
1628 // Create a CompileTask object representing the current request for
1629 // compilation. Add this task to the queue.
1630 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1631 int compile_id,
1632 const methodHandle& method,
1633 int osr_bci,
1634 int comp_level,
1635 int hot_count,
1636 CompileTask::CompileReason compile_reason,
1637 bool blocking) {
1638 CompileTask* new_task = new CompileTask(compile_id, method, osr_bci, comp_level,
1639 hot_count, compile_reason, blocking);
1640 queue->add(new_task);
1641 return new_task;
1642 }
1643
1644 #if INCLUDE_JVMCI
1645 // The number of milliseconds to wait before checking if
1646 // JVMCI compilation has made progress.
1647 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1648
1649 // The number of JVMCI compilation progress checks that must fail
1650 // before unblocking a thread waiting for a blocking compilation.
1651 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1652
1653 /**
1654 * Waits for a JVMCI compiler to complete a given task. This thread
1655 * waits until either the task completes or it sees no JVMCI compilation
1656 * progress for N consecutive milliseconds where N is
1657 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1658 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1659 *
1660 * @return true if this thread needs to delete the task
1774 * compiler threads can start compiling.
1775 */
1776 bool CompileBroker::init_compiler_runtime() {
1777 CompilerThread* thread = CompilerThread::current();
1778 AbstractCompiler* comp = thread->compiler();
1779 // Final sanity check - the compiler object must exist
1780 guarantee(comp != nullptr, "Compiler object must exist");
1781
1782 {
1783 // Must switch to native to allocate ci_env
1784 ThreadToNativeFromVM ttn(thread);
1785 ciEnv ci_env((CompileTask*)nullptr);
1786 // Cache Jvmti state
1787 ci_env.cache_jvmti_state();
1788 // Cache DTrace flags
1789 ci_env.cache_dtrace_flags();
1790
1791 // Switch back to VM state to do compiler initialization
1792 ThreadInVMfromNative tv(thread);
1793
1794 // Perform per-thread and global initializations
1795 comp->initialize();
1796 }
1797
1798 if (comp->is_failed()) {
1799 disable_compilation_forever();
1800 // If compiler initialization failed, no compiler thread that is specific to a
1801 // particular compiler runtime will ever start to compile methods.
1802 shutdown_compiler_runtime(comp, thread);
1803 return false;
1804 }
1805
1806 // C1 specific check
1807 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
1808 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1809 return false;
1810 }
1811
1812 return true;
1813 }
1814
1815 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
1816 BufferBlob* blob = thread->get_buffer_blob();
1817 if (blob != nullptr) {
1818 blob->purge();
1819 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1820 CodeCache::free(blob);
1821 }
1822 }
1823
1824 /**
1825 * If C1 and/or C2 initialization failed, we shut down all compilation.
1826 * We do this to keep things simple. This can be changed if it ever turns
1827 * out to be a problem.
1828 */
1829 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1830 free_buffer_blob_if_allocated(thread);
1831
1832 if (comp->should_perform_shutdown()) {
1833 // There are two reasons for shutting down the compiler
1834 // 1) compiler runtime initialization failed
1835 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1836 warning("%s initialization failed. Shutting down all compilers", comp->name());
1837
1838 // Only one thread per compiler runtime object enters here
1839 // Set state to shut down
1840 comp->set_shut_down();
1841
1842 // Delete all queued compilation tasks to make compiler threads exit faster.
1843 if (_c1_compile_queue != nullptr) {
1844 _c1_compile_queue->delete_all();
1845 }
1846
1847 if (_c2_compile_queue != nullptr) {
1848 _c2_compile_queue->delete_all();
1849 }
1850
1851 // Set flags so that we continue execution with using interpreter only.
1855 // We could delete compiler runtimes also. However, there are references to
1856 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1857 // fail. This can be done later if necessary.
1858 }
1859 }
1860
1861 /**
1862 * Helper function to create new or reuse old CompileLog.
1863 */
1864 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1865 if (!LogCompilation) return nullptr;
1866
1867 AbstractCompiler *compiler = ct->compiler();
1868 bool c1 = compiler->is_c1();
1869 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1870 assert(compiler_objects != nullptr, "must be initialized at this point");
1871 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1872 assert(logs != nullptr, "must be initialized at this point");
1873 int count = c1 ? _c1_count : _c2_count;
1874
1875 // Find Compiler number by its threadObj.
1876 oop compiler_obj = ct->threadObj();
1877 int compiler_number = 0;
1878 bool found = false;
1879 for (; compiler_number < count; compiler_number++) {
1880 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
1881 found = true;
1882 break;
1883 }
1884 }
1885 assert(found, "Compiler must exist at this point");
1886
1887 // Determine pointer for this thread's log.
1888 CompileLog** log_ptr = &logs[compiler_number];
1889
1890 // Return old one if it exists.
1891 CompileLog* log = *log_ptr;
1892 if (log != nullptr) {
1893 ct->init_log(log);
1894 return log;
1936 if (!thread->init_compilation_timeout()) {
1937 return;
1938 }
1939
1940 // If compiler thread/runtime initialization fails, exit the compiler thread
1941 if (!init_compiler_runtime()) {
1942 return;
1943 }
1944
1945 thread->start_idle_timer();
1946
1947 // Poll for new compilation tasks as long as the JVM runs. Compilation
1948 // should only be disabled if something went wrong while initializing the
1949 // compiler runtimes. This, in turn, should not happen. The only known case
1950 // when compiler runtime initialization fails is if there is not enough free
1951 // space in the code cache to generate the necessary stubs, etc.
1952 while (!is_compilation_disabled_forever()) {
1953 // We need this HandleMark to avoid leaking VM handles.
1954 HandleMark hm(thread);
1955
1956 CompileTask* task = queue->get(thread);
1957 if (task == nullptr) {
1958 if (UseDynamicNumberOfCompilerThreads) {
1959 // Access compiler_count under lock to enforce consistency.
1960 MutexLocker only_one(CompileThread_lock);
1961 if (can_remove(thread, true)) {
1962 if (trace_compiler_threads()) {
1963 ResourceMark rm;
1964 stringStream msg;
1965 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1966 thread->name(), thread->idle_time_millis());
1967 print_compiler_threads(msg);
1968 }
1969
1970 // Notify compiler that the compiler thread is about to stop
1971 thread->compiler()->stopping_compiler_thread(thread);
1972
1973 free_buffer_blob_if_allocated(thread);
1974 return; // Stop this thread.
1975 }
1976 }
1977 } else {
1978 // Assign the task to the current thread. Mark this compilation
1979 // thread as active for the profiler.
1980 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1981 // occurs after fetching the compile task off the queue.
1982 CompileTaskWrapper ctw(task);
1983 methodHandle method(thread, task->method());
1984
1985 // Never compile a method if breakpoints are present in it
1986 if (method()->number_of_breakpoints() == 0) {
1987 // Compile the method.
1988 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1989 invoke_compiler_on_method(task);
1990 thread->start_idle_timer();
1991 } else {
1992 // After compilation is disabled, remove remaining methods from queue
1993 method->clear_queued_for_compilation();
1994 task->set_failure_reason("compilation is disabled");
1995 }
1996 } else {
1997 task->set_failure_reason("breakpoints are present");
1998 }
1999
2000 if (UseDynamicNumberOfCompilerThreads) {
2001 possibly_add_compiler_threads(thread);
2002 assert(!thread->has_pending_exception(), "should have been handled");
2003 }
2004 }
2005 }
2006
2007 // Shut down compiler runtime
2008 shutdown_compiler_runtime(thread->compiler(), thread);
2009 }
2010
2011 // ------------------------------------------------------------------
2012 // CompileBroker::init_compiler_thread_log
2013 //
2014 // Set up state required by +LogCompilation.
2015 void CompileBroker::init_compiler_thread_log() {
2016 CompilerThread* thread = CompilerThread::current();
2017 char file_name[4*K];
2018 FILE* fp = nullptr;
2019 intx thread_id = os::current_thread_id();
2020 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
2176
2177 // Acquires Compilation_lock and waits for it to be notified
2178 // as long as WhiteBox::compilation_locked is true.
2179 static void whitebox_lock_compilation() {
2180 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2181 while (WhiteBox::compilation_locked) {
2182 locker.wait();
2183 }
2184 }
2185
2186 // ------------------------------------------------------------------
2187 // CompileBroker::invoke_compiler_on_method
2188 //
2189 // Compile a method.
2190 //
2191 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2192 task->print_ul();
2193 elapsedTimer time;
2194
2195 DirectiveSet* directive = task->directive();
2196 if (directive->PrintCompilationOption) {
2197 ResourceMark rm;
2198 task->print_tty();
2199 }
2200
2201 CompilerThread* thread = CompilerThread::current();
2202 ResourceMark rm(thread);
2203
2204 if (CompilationLog::log() != nullptr) {
2205 CompilationLog::log()->log_compile(thread, task);
2206 }
2207
2208 // Common flags.
2209 int compile_id = task->compile_id();
2210 int osr_bci = task->osr_bci();
2211 bool is_osr = (osr_bci != standard_entry_bci);
2212 bool should_log = (thread->log() != nullptr);
2213 bool should_break = false;
2214 const int task_level = task->comp_level();
2215 AbstractCompiler* comp = task->compiler();
2216 {
2217 // create the handle inside it's own block so it can't
2218 // accidentally be referenced once the thread transitions to
2219 // native. The NoHandleMark before the transition should catch
2220 // any cases where this occurs in the future.
2221 methodHandle method(thread, task->method());
2222
2223 assert(!method->is_native(), "no longer compile natives");
2224
2225 // Update compile information when using perfdata.
2226 if (UsePerfData) {
2227 update_compile_perf_data(thread, method, is_osr);
2228 }
2229
2230 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2231 }
2232
2233 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2328 ci_env.record_method_not_compilable("redefined method", true);
2329 }
2330
2331 // Cache DTrace flags
2332 ci_env.cache_dtrace_flags();
2333
2334 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2335
2336 TraceTime t1("compilation", &time);
2337 EventCompilation event;
2338
2339 if (comp == nullptr) {
2340 ci_env.record_method_not_compilable("no compiler");
2341 } else if (!ci_env.failing()) {
2342 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2343 whitebox_lock_compilation();
2344 }
2345 comp->compile_method(&ci_env, target, osr_bci, true, directive);
2346
2347 /* Repeat compilation without installing code for profiling purposes */
2348 int repeat_compilation_count = directive->RepeatCompilationOption;
2349 if (repeat_compilation_count > 0) {
2350 CHeapStringHolder failure_reason;
2351 failure_reason.set(ci_env._failure_reason.get());
2352 while (repeat_compilation_count > 0) {
2353 ResourceMark rm(thread);
2354 task->print_ul("NO CODE INSTALLED");
2355 thread->timeout()->reset();
2356 ci_env._failure_reason.clear();
2357 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2358 repeat_compilation_count--;
2359 }
2360 ci_env._failure_reason.set(failure_reason.get());
2361 }
2362 }
2363
2364
2365 if (!ci_env.failing() && !task->is_success()) {
2366 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2367 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2368 // The compiler elected, without comment, not to register a result.
2369 // Do not attempt further compilations of this method.
2370 ci_env.record_method_not_compilable("compile failed");
2371 }
2372
2373 // Copy this bit to the enclosing block:
2374 compilable = ci_env.compilable();
2375
2376 if (ci_env.failing()) {
2377 // Duplicate the failure reason string, so that it outlives ciEnv
2378 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2379 failure_reason_on_C_heap = true;
2380 retry_message = ci_env.retry_message();
2381 ci_env.report_failure(failure_reason);
2382 }
2383
2384 if (ci_env.failing()) {
2385 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2386 }
2387 if (event.should_commit()) {
2388 post_compilation_event(event, task);
2389 }
2390 }
2391
2392 if (failure_reason != nullptr) {
2393 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2394 if (CompilationLog::log() != nullptr) {
2395 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2396 }
2397 if (PrintCompilation || directive->PrintCompilationOption) {
2398 FormatBufferResource msg = retry_message != nullptr ?
2399 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2400 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2401 task->print(tty, msg);
2402 }
2403 }
2404
2405 DirectivesStack::release(directive);
2406
2407 methodHandle method(thread, task->method());
2408
2409 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2410
2411 collect_statistics(thread, time, task);
2412
2413 if (PrintCompilation && PrintCompilation2) {
2414 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2415 tty->print("%4d ", compile_id); // print compilation number
2416 tty->print("%s ", (is_osr ? "%" : " "));
2417 if (task->is_success()) {
2418 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2419 }
2420 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2421 }
2422
2423 Log(compilation, codecache) log;
2424 if (log.is_debug()) {
2425 LogStream ls(log.debug());
2426 codecache_print(&ls, /* detailed= */ false);
2427 }
2428 if (PrintCodeCacheOnCompilation) {
2429 codecache_print(/* detailed= */ false);
2430 }
2431 // Disable compilation, if required.
2432 switch (compilable) {
2433 case ciEnv::MethodCompilable_never:
2434 if (is_osr)
2435 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2436 else
2437 method->set_not_compilable_quietly("MethodCompilable_never");
2438 break;
2439 case ciEnv::MethodCompilable_not_at_tier:
2440 if (is_osr)
2441 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2442 else
2443 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2444 break;
2445 }
2446
2447 // Note that the queued_for_compilation bits are cleared without
2448 // protection of a mutex. [They were set by the requester thread,
2449 // when adding the task to the compile queue -- at which time the
2450 // compile queue lock was held. Subsequently, we acquired the compile
2451 // queue lock to get this task off the compile queue; thus (to belabour
2452 // the point somewhat) our clearing of the bits must be occurring
2453 // only after the setting of the bits. See also 14012000 above.
2454 method->clear_queued_for_compilation();
2455 }
2456
2457 /**
2458 * The CodeCache is full. Print warning and disable compilation.
2459 * Schedule code cache cleaning so compilation can continue later.
2460 * This function needs to be called only from CodeCache::allocate(),
2461 * since we currently handle a full code cache uniformly.
2462 */
2463 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2464 UseInterpreter = true;
2465 if (UseCompiler || AlwaysCompileLoopMethods ) {
2466 if (xtty != nullptr) {
2467 stringStream s;
2468 // Dump code cache state into a buffer before locking the tty,
2469 // because log_state() will use locks causing lock conflicts.
2470 CodeCache::log_state(&s);
2471 // Lock to prevent tearing
2472 ttyLocker ttyl;
2473 xtty->begin_elem("code_cache_full");
2474 xtty->print("%s", s.freeze());
2547 // CompileBroker::collect_statistics
2548 //
2549 // Collect statistics about the compilation.
2550
2551 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2552 bool success = task->is_success();
2553 methodHandle method (thread, task->method());
2554 int compile_id = task->compile_id();
2555 bool is_osr = (task->osr_bci() != standard_entry_bci);
2556 const int comp_level = task->comp_level();
2557 CompilerCounters* counters = thread->counters();
2558
2559 MutexLocker locker(CompileStatistics_lock);
2560
2561 // _perf variables are production performance counters which are
2562 // updated regardless of the setting of the CITime and CITimeEach flags
2563 //
2564
2565 // account all time, including bailouts and failures in this counter;
2566 // C1 and C2 counters are counting both successful and unsuccessful compiles
2567 _t_total_compilation.add(time);
2568
2569 // Update compilation times. Used by the implementation of JFR CompilerStatistics
2570 // and java.lang.management.CompilationMXBean.
2571 _perf_total_compilation->inc(time.ticks());
2572 _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2573
2574 if (!success) {
2575 _total_bailout_count++;
2576 if (UsePerfData) {
2577 _perf_last_failed_method->set_value(counters->current_method());
2578 _perf_last_failed_type->set_value(counters->compile_type());
2579 _perf_total_bailout_count->inc();
2580 }
2581 _t_bailedout_compilation.add(time);
2582 } else if (!task->is_success()) {
2583 if (UsePerfData) {
2584 _perf_last_invalidated_method->set_value(counters->current_method());
2585 _perf_last_invalidated_type->set_value(counters->compile_type());
2586 _perf_total_invalidated_count->inc();
2587 }
2588 _total_invalidated_count++;
2589 _t_invalidated_compilation.add(time);
2590 } else {
2591 // Compilation succeeded
2592 if (CITime) {
2593 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2594 if (is_osr) {
2595 _t_osr_compilation.add(time);
2596 _sum_osr_bytes_compiled += bytes_compiled;
2597 } else {
2598 _t_standard_compilation.add(time);
2599 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2600 }
2601
2602 // Collect statistic per compilation level
2603 if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2604 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2605 if (is_osr) {
2606 stats->_osr.update(time, bytes_compiled);
2607 } else {
2608 stats->_standard.update(time, bytes_compiled);
2609 }
2610 stats->_nmethods_size += task->nm_total_size();
2611 stats->_nmethods_code_size += task->nm_insts_size();
2612 } else {
2613 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2614 }
2615
2616 // Collect statistic per compiler
2617 AbstractCompiler* comp = compiler(comp_level);
2618 if (comp) {
2619 CompilerStatistics* stats = comp->stats();
2620 if (is_osr) {
2621 stats->_osr.update(time, bytes_compiled);
2622 } else {
2623 stats->_standard.update(time, bytes_compiled);
2624 }
2625 stats->_nmethods_size += task->nm_total_size();
2626 stats->_nmethods_code_size += task->nm_insts_size();
2627 } else { // if (!comp)
2628 assert(false, "Compiler object must exist");
2629 }
2630 }
2631
2632 if (UsePerfData) {
2633 // save the name of the last method compiled
2634 _perf_last_method->set_value(counters->current_method());
2635 _perf_last_compile_type->set_value(counters->compile_type());
2636 _perf_last_compile_size->set_value(method->code_size() +
2637 task->num_inlined_bytecodes());
2638 if (is_osr) {
2639 _perf_osr_compilation->inc(time.ticks());
2640 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2641 } else {
2642 _perf_standard_compilation->inc(time.ticks());
2643 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2644 }
2645 }
2646
2647 if (CITimeEach) {
2670 _total_standard_compile_count++;
2671 }
2672 }
2673 // set the current method for the thread to null
2674 if (UsePerfData) counters->set_current_method("");
2675 }
2676
2677 const char* CompileBroker::compiler_name(int comp_level) {
2678 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2679 if (comp == nullptr) {
2680 return "no compiler";
2681 } else {
2682 return (comp->name());
2683 }
2684 }
2685
2686 jlong CompileBroker::total_compilation_ticks() {
2687 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2688 }
2689
2690 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2691 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}",
2692 name, stats->bytes_per_second(),
2693 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2694 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2695 stats->_nmethods_size, stats->_nmethods_code_size);
2696 }
2697
2698 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2699 if (per_compiler) {
2700 if (aggregate) {
2701 tty->cr();
2702 tty->print_cr("Individual compiler times (for compiled methods only)");
2703 tty->print_cr("------------------------------------------------");
2704 tty->cr();
2705 }
2706 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2707 AbstractCompiler* comp = _compilers[i];
2708 if (comp != nullptr) {
2709 print_times(comp->name(), comp->stats());
2710 }
2711 }
2712 if (aggregate) {
2713 tty->cr();
2714 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
2715 tty->print_cr("------------------------------------------------");
2716 tty->cr();
2717 }
2718 char tier_name[256];
2719 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
2720 CompilerStatistics* stats = &_stats_per_level[tier-1];
2721 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
2722 print_times(tier_name, stats);
2723 }
2724 }
2725
2726 if (!aggregate) {
2727 return;
2728 }
2729
2730 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2731 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2732 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2733
2734 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2735 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2736
2737 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
2738 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
2739 uint total_compile_count = CompileBroker::_total_compile_count;
2740 uint total_bailout_count = CompileBroker::_total_bailout_count;
2741 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
2742
2743 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
2745
2746 tty->cr();
2747 tty->print_cr("Accumulated compiler times");
2748 tty->print_cr("----------------------------------------------------------");
2749 //0000000000111111111122222222223333333333444444444455555555556666666666
2750 //0123456789012345678901234567890123456789012345678901234567890123456789
2751 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2752 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2753 standard_compilation.seconds(),
2754 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
2755 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2756 CompileBroker::_t_bailedout_compilation.seconds(),
2757 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
2758 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2759 osr_compilation.seconds(),
2760 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
2761 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2762 CompileBroker::_t_invalidated_compilation.seconds(),
2763 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
2764
2765 AbstractCompiler *comp = compiler(CompLevel_simple);
2766 if (comp != nullptr) {
2767 tty->cr();
2768 comp->print_timers();
2769 }
2770 comp = compiler(CompLevel_full_optimization);
2771 if (comp != nullptr) {
2772 tty->cr();
2773 comp->print_timers();
2774 }
2775 #if INCLUDE_JVMCI
2776 if (EnableJVMCI) {
2777 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
2778 if (jvmci_comp != nullptr && jvmci_comp != comp) {
2779 tty->cr();
2780 jvmci_comp->print_timers();
2781 }
2782 }
2783 #endif
2784
|
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "cds/aotLinkedClassBulkLoader.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "classfile/javaClasses.inline.hpp"
28 #include "classfile/symbolTable.hpp"
29 #include "classfile/vmClasses.hpp"
30 #include "classfile/vmSymbols.hpp"
31 #include "code/aotCodeCache.hpp"
32 #include "code/codeCache.hpp"
33 #include "code/codeHeapState.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "compiler/compilationLog.hpp"
36 #include "compiler/compilationMemoryStatistic.hpp"
37 #include "compiler/compilationPolicy.hpp"
38 #include "compiler/compileBroker.hpp"
39 #include "compiler/compileLog.hpp"
40 #include "compiler/compilerDefinitions.inline.hpp"
41 #include "compiler/compilerEvent.hpp"
42 #include "compiler/compilerOracle.hpp"
43 #include "compiler/directivesParser.hpp"
44 #include "compiler/recompilationPolicy.hpp"
45 #include "gc/shared/memAllocator.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jfr/jfrEvents.hpp"
48 #include "jvm.h"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/allocation.inline.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/methodData.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/nativeLookup.hpp"
59 #include "prims/whitebox.hpp"
60 #include "runtime/atomicAccess.hpp"
61 #include "runtime/escapeBarrier.hpp"
62 #include "runtime/globals_extension.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/init.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jniHandles.inline.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/safepointVerifiers.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/threads.hpp"
74 #include "runtime/threadSMR.inline.hpp"
75 #include "runtime/timerTrace.hpp"
76 #include "runtime/vframe.inline.hpp"
77 #include "services/management.hpp"
78 #include "utilities/debug.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/events.hpp"
81 #include "utilities/formatBuffer.hpp"
82 #include "utilities/macros.hpp"
83 #include "utilities/nonblockingQueue.inline.hpp"
84 #ifdef COMPILER1
85 #include "c1/c1_Compiler.hpp"
86 #endif
87 #ifdef COMPILER2
88 #include "opto/c2compiler.hpp"
89 #endif
90 #if INCLUDE_JVMCI
91 #include "jvmci/jvmciEnv.hpp"
92 #include "jvmci/jvmciRuntime.hpp"
93 #endif
94
95 #ifdef DTRACE_ENABLED
96
97 // Only bother with this argument setup if dtrace is available
98
99 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
100 { \
101 Symbol* klass_name = (method)->klass_name(); \
102 Symbol* name = (method)->name(); \
103 Symbol* signature = (method)->signature(); \
121 }
122
123 #else // ndef DTRACE_ENABLED
124
125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
126 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
127
128 #endif // ndef DTRACE_ENABLED
129
130 bool CompileBroker::_initialized = false;
131 volatile bool CompileBroker::_should_block = false;
132 volatile int CompileBroker::_print_compilation_warning = 0;
133 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
134
135 // The installed compiler(s)
136 AbstractCompiler* CompileBroker::_compilers[2];
137
138 // The maximum numbers of compiler threads to be determined during startup.
139 int CompileBroker::_c1_count = 0;
140 int CompileBroker::_c2_count = 0;
141 int CompileBroker::_ac_count = 0;
142
143 // An array of compiler names as Java String objects
144 jobject* CompileBroker::_compiler1_objects = nullptr;
145 jobject* CompileBroker::_compiler2_objects = nullptr;
146 jobject* CompileBroker::_ac_objects = nullptr;
147
148 CompileLog** CompileBroker::_compiler1_logs = nullptr;
149 CompileLog** CompileBroker::_compiler2_logs = nullptr;
150 CompileLog** CompileBroker::_ac_logs = nullptr;
151
152 // These counters are used to assign an unique ID to each compilation.
153 volatile jint CompileBroker::_compilation_id = 0;
154 volatile jint CompileBroker::_osr_compilation_id = 0;
155 volatile jint CompileBroker::_native_compilation_id = 0;
156
157 // Performance counters
158 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
159 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
160 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
161
162 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
163 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
164 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
165 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
166 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
167
168 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
169 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
170 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
171 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
172
173 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
174 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
175 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
176 PerfVariable* CompileBroker::_perf_last_compile_type = nullptr;
177 PerfVariable* CompileBroker::_perf_last_compile_size = nullptr;
178 PerfVariable* CompileBroker::_perf_last_failed_type = nullptr;
179 PerfVariable* CompileBroker::_perf_last_invalidated_type = nullptr;
180
181 // Timers and counters for generating statistics
182 elapsedTimer CompileBroker::_t_total_compilation;
183 elapsedTimer CompileBroker::_t_osr_compilation;
184 elapsedTimer CompileBroker::_t_standard_compilation;
185 elapsedTimer CompileBroker::_t_invalidated_compilation;
186 elapsedTimer CompileBroker::_t_bailedout_compilation;
187
188 uint CompileBroker::_total_bailout_count = 0;
189 uint CompileBroker::_total_invalidated_count = 0;
190 uint CompileBroker::_total_not_entrant_count = 0;
191 uint CompileBroker::_total_compile_count = 0;
192 uint CompileBroker::_total_osr_compile_count = 0;
193 uint CompileBroker::_total_standard_compile_count = 0;
194 uint CompileBroker::_total_compiler_stopped_count = 0;
195 uint CompileBroker::_total_compiler_restarted_count = 0;
196
197 uint CompileBroker::_sum_osr_bytes_compiled = 0;
198 uint CompileBroker::_sum_standard_bytes_compiled = 0;
199 uint CompileBroker::_sum_nmethod_size = 0;
200 uint CompileBroker::_sum_nmethod_code_size = 0;
201
202 jlong CompileBroker::_peak_compilation_time = 0;
203
204 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
205 CompilerStatistics CompileBroker::_aot_stats;
206 CompilerStatistics CompileBroker::_aot_stats_per_level[CompLevel_full_optimization + 1];
207
208 CompileQueue* CompileBroker::_c2_compile_queue = nullptr;
209 CompileQueue* CompileBroker::_c1_compile_queue = nullptr;
210 CompileQueue* CompileBroker::_ac1_compile_queue = nullptr;
211 CompileQueue* CompileBroker::_ac2_compile_queue = nullptr;
212
213 bool compileBroker_init() {
214 if (LogEvents) {
215 CompilationLog::init();
216 }
217
218 // init directives stack, adding default directive
219 DirectivesStack::init();
220
221 if (DirectivesParser::has_file()) {
222 return DirectivesParser::parse_from_flag();
223 } else if (CompilerDirectivesPrint) {
224 // Print default directive even when no other was added
225 DirectivesStack::print(tty);
226 }
227
228 return true;
229 }
230
231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
232 CompilerThread* thread = CompilerThread::current();
233 thread->set_task(task);
234 CompileLog* log = thread->log();
235 thread->timeout()->arm();
236 if (log != nullptr && !task->is_unloaded()) task->log_task_start(log);
237 }
238
239 CompileTaskWrapper::~CompileTaskWrapper() {
240 CompilerThread* thread = CompilerThread::current();
241
242 // First, disarm the timeout. This still relies on the underlying task.
243 thread->timeout()->disarm();
244
245 CompileTask* task = thread->task();
246 CompileLog* log = thread->log();
247 AbstractCompiler* comp = thread->compiler();
248 if (log != nullptr && !task->is_unloaded()) task->log_task_done(log);
249 thread->set_task(nullptr);
250 thread->set_env(nullptr);
251 if (task->is_blocking()) {
252 bool free_task = false;
253 {
254 MutexLocker notifier(thread, CompileTaskWait_lock);
255 task->mark_complete();
256 #if INCLUDE_JVMCI
257 if (comp->is_jvmci()) {
258 if (!task->has_waiter()) {
259 // The waiting thread timed out and thus did not delete the task.
260 free_task = true;
261 }
262 task->set_blocking_jvmci_compile_state(nullptr);
263 }
264 #endif
265 if (!free_task) {
266 // Notify the waiting thread that the compilation has completed
267 // so that it can free the task.
268 CompileTaskWait_lock->notify_all();
269 }
270 }
271 if (free_task) {
272 // The task can only be deleted once the task lock is released.
273 delete task;
274 }
275 } else {
276 task->mark_complete();
277
278 // By convention, the compiling thread is responsible for deleting
279 // a non-blocking CompileTask.
280 delete task;
281 }
282 }
283
284 /**
285 * Check if a CompilerThread can be removed and update count if requested.
286 */
287 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
288 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
289 if (!ReduceNumberOfCompilerThreads) return false;
290
291 if (RecompilationPolicy::have_recompilation_work()) return false;
292
293 AbstractCompiler *compiler = ct->compiler();
294 int compiler_count = compiler->num_compiler_threads();
295 bool c1 = compiler->is_c1();
296
297 // Keep at least 1 compiler thread of each type.
298 if (compiler_count < 2) return false;
299
300 // Keep thread alive for at least some time.
301 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
302
303 #if INCLUDE_JVMCI
304 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
305 // Handles for JVMCI thread objects may get released concurrently.
306 if (do_it) {
307 assert(CompileThread_lock->owner() == ct, "must be holding lock");
308 } else {
309 // Skip check if it's the last thread and let caller check again.
310 return true;
311 }
312 }
319 if (do_it) {
320 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
321 compiler->set_num_compiler_threads(compiler_count - 1);
322 #if INCLUDE_JVMCI
323 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
324 // Old j.l.Thread object can die when no longer referenced elsewhere.
325 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
326 _compiler2_objects[compiler_count - 1] = nullptr;
327 }
328 #endif
329 }
330 return true;
331 }
332 return false;
333 }
334
335 /**
336 * Add a CompileTask to a CompileQueue.
337 */
338 void CompileQueue::add(CompileTask* task) {
339 assert(_lock->owned_by_self(), "must own lock");
340
341 task->set_next(nullptr);
342 task->set_prev(nullptr);
343
344 if (_last == nullptr) {
345 // The compile queue is empty.
346 assert(_first == nullptr, "queue is empty");
347 _first = task;
348 _last = task;
349 } else {
350 // Append the task to the queue.
351 assert(_last->next() == nullptr, "not last");
352 _last->set_next(task);
353 task->set_prev(_last);
354 _last = task;
355 }
356 ++_size;
357 ++_total_added;
358 if (_size > _peak_size) {
359 _peak_size = _size;
360 }
361
362 // Mark the method as being in the compile queue.
363 task->method()->set_queued_for_compilation();
364
365 task->mark_queued(os::elapsed_counter());
366
367 if (CIPrintCompileQueue) {
368 print_tty();
369 }
370
371 if (LogCompilation && xtty != nullptr) {
372 task->log_task_queued();
373 }
374
375 if (TrainingData::need_data() && !CDSConfig::is_dumping_final_static_archive()) {
376 CompileTrainingData* ctd = CompileTrainingData::make(task);
377 if (ctd != nullptr) {
378 task->set_training_data(ctd);
379 }
380 }
381
382 // Notify CompilerThreads that a task is available.
383 _lock->notify_all();
384 }
385
386 void CompileQueue::add_pending(CompileTask* task) {
387 assert(_lock->owned_by_self() == false, "must NOT own lock");
388 assert(UseLockFreeCompileQueues, "");
389 task->method()->set_queued_for_compilation();
390 _queue.push(*task);
391 // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
392 if (is_empty()) {
393 MutexLocker ml(_lock);
394 _lock->notify_all();
395 }
396 }
397
398 static bool process_pending(CompileTask* task) {
399 // guarantee(task->method()->queued_for_compilation(), "");
400 if (task->is_unloaded()) {
401 return true; // unloaded
402 }
403 task->method()->set_queued_for_compilation(); // FIXME
404 if (task->method()->pending_queue_processed()) {
405 return true; // already queued
406 }
407 // Mark the method as being in the compile queue.
408 task->method()->set_pending_queue_processed();
409 if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
410 task->requires_online_compilation(), task->compile_reason())) {
411 return true; // already compiled
412 }
413 return false; // active
414 }
415
416 void CompileQueue::transfer_pending() {
417 assert(_lock->owned_by_self(), "must own lock");
418
419 CompileTask* task;
420 while ((task = _queue.pop()) != nullptr) {
421 bool is_stale = process_pending(task);
422 if (is_stale) {
423 task->set_next(_first_stale);
424 task->set_prev(nullptr);
425 _first_stale = task;
426 } else {
427 add(task);
428 }
429 }
430 }
431
432 /**
433 * Empties compilation queue by deleting all compilation tasks.
434 * Furthermore, the method wakes up all threads that are waiting
435 * on a compilation task to finish. This can happen if background
436 * compilation is disabled.
437 */
438 void CompileQueue::delete_all() {
439 MutexLocker mu(_lock);
440 transfer_pending();
441
442 CompileTask* current = _first;
443
444 // Iterate over all tasks in the compile queue
445 while (current != nullptr) {
446 CompileTask* next = current->next();
447 if (!current->is_blocking()) {
448 // Non-blocking task. No one is waiting for it, delete it now.
449 delete current;
450 } else {
451 // Blocking task. By convention, it is the waiters responsibility
452 // to delete the task. We cannot delete it here, because we do not
453 // coordinate with waiters. We will notify the waiters later.
454 }
455 current = next;
456 }
457 _first = nullptr;
458 _last = nullptr;
459
460 // Wake up all blocking task waiters to deal with remaining blocking
461 // tasks. This is not a performance sensitive path, so we do this
462 // unconditionally to simplify coding/testing.
463 {
464 MonitorLocker ml(Thread::current(), CompileTaskWait_lock);
465 ml.notify_all();
466 }
467
468 // Wake up all threads that block on the queue.
469 _lock->notify_all();
470 }
471
472 /**
473 * Get the next CompileTask from a CompileQueue
474 */
475 CompileTask* CompileQueue::get(CompilerThread* thread) {
476 // save methods from RedefineClasses across safepoint
477 // across compile queue lock below.
478 methodHandle save_method;
479
480 MonitorLocker locker(_lock);
481 transfer_pending();
482
483 RecompilationPolicy::sample_load_average();
484
485 // If _first is null we have no more compile jobs. There are two reasons for
486 // having no compile jobs: First, we compiled everything we wanted. Second,
487 // we ran out of code cache so compilation has been disabled. In the latter
488 // case we perform code cache sweeps to free memory such that we can re-enable
489 // compilation.
490 while (_first == nullptr) {
491 // Exit loop if compilation is disabled forever
492 if (CompileBroker::is_compilation_disabled_forever()) {
493 return nullptr;
494 }
495
496 AbstractCompiler* compiler = thread->compiler();
497 guarantee(compiler != nullptr, "Compiler object must exist");
498 compiler->on_empty_queue(this, thread);
499 if (_first != nullptr) {
500 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
501 // so check again whether any tasks were added to the queue.
502 break;
503 }
504
505 // If we have added stale tasks, there might be waiters that want
506 // the notification these tasks have failed. Normally, this would
507 // be done by a compiler thread that would perform the purge at
508 // the end of some compilation. But, if compile queue is empty,
509 // there is no guarantee compilers would run and do the purge.
510 // Do the purge here and now to unblock the waiters.
511 // Perform this until we run out of stale tasks.
512 while (_first_stale != nullptr) {
513 purge_stale_tasks();
514 }
515 if (_first != nullptr) {
516 // Purge stale tasks may have transferred some new tasks,
517 // so check again.
518 break;
519 }
520
521 // If there are no compilation tasks and we can compile new jobs
522 // (i.e., there is enough free space in the code cache) there is
523 // no need to invoke the GC.
524 // We need a timed wait here, since compiler threads can exit if compilation
525 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
526 // is not critical and we do not want idle compiler threads to wake up too often.
527 locker.wait(5*1000);
528
529 transfer_pending(); // reacquired lock
530
531 if (RecompilationPolicy::have_recompilation_work()) return nullptr;
532
533 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
534 // Still nothing to compile. Give caller a chance to stop this thread.
535 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
536 }
537 }
538
539 if (CompileBroker::is_compilation_disabled_forever()) {
540 return nullptr;
541 }
542
543 CompileTask* task;
544 {
545 NoSafepointVerifier nsv;
546 task = CompilationPolicy::select_task(this, thread);
547 if (task != nullptr) {
548 task = task->select_for_compilation();
549 }
550 }
551
552 if (task != nullptr) {
553 // Save method pointers across unlock safepoint. The task is removed from
554 // the compilation queue, which is walked during RedefineClasses.
555 Thread* thread = Thread::current();
556 save_method = methodHandle(thread, task->method());
557
558 remove(task);
559 }
560 purge_stale_tasks(); // may temporarily release MCQ lock
561 return task;
562 }
563
564 // Clean & deallocate stale compile tasks.
565 // Temporarily releases MethodCompileQueue lock.
566 void CompileQueue::purge_stale_tasks() {
567 assert(_lock->owned_by_self(), "must own lock");
568 if (_first_stale != nullptr) {
569 // Stale tasks are purged when MCQ lock is released,
570 // but _first_stale updates are protected by MCQ lock.
571 // Once task processing starts and MCQ lock is released,
572 // other compiler threads can reuse _first_stale.
573 CompileTask* head = _first_stale;
574 _first_stale = nullptr;
575 {
576 MutexUnlocker ul(_lock);
577 for (CompileTask* task = head; task != nullptr; ) {
578 CompileTask* next_task = task->next();
579 task->set_next(nullptr);
580 CompileTaskWrapper ctw(task); // Frees the task
581 task->set_failure_reason("stale task");
582 task = next_task;
583 }
584 }
585 transfer_pending(); // transfer pending after reacquiring MCQ lock
586 }
587 }
588
589 void CompileQueue::remove(CompileTask* task) {
590 assert(_lock->owned_by_self(), "must own lock");
591 if (task->prev() != nullptr) {
592 task->prev()->set_next(task->next());
593 } else {
594 // max is the first element
595 assert(task == _first, "Sanity");
596 _first = task->next();
597 }
598
599 if (task->next() != nullptr) {
600 task->next()->set_prev(task->prev());
601 } else {
602 // max is the last element
603 assert(task == _last, "Sanity");
604 _last = task->prev();
605 }
606 task->set_next(nullptr);
607 task->set_prev(nullptr);
608 --_size;
609 ++_total_removed;
610 }
611
612 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
613 assert(_lock->owned_by_self(), "must own lock");
614 remove(task);
615
616 // Enqueue the task for reclamation (should be done outside MCQ lock)
617 task->set_next(_first_stale);
618 task->set_prev(nullptr);
619 _first_stale = task;
620 }
621
622 // methods in the compile queue need to be marked as used on the stack
623 // so that they don't get reclaimed by Redefine Classes
624 void CompileQueue::mark_on_stack() {
625 for (CompileTask* task = _first; task != nullptr; task = task->next()) {
626 task->mark_on_stack();
627 }
628 for (CompileTask* task = _queue.first(); !_queue.is_end(task); task = task->next()) {
629 assert(task != nullptr, "");
630 task->mark_on_stack();
631 }
632 }
633
634
635 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_aot) {
636 if (is_c2_compile(comp_level)) return ((is_aot && (_ac_count > 0)) ? _ac2_compile_queue : _c2_compile_queue);
637 if (is_c1_compile(comp_level)) return ((is_aot && (_ac_count > 0)) ? _ac1_compile_queue : _c1_compile_queue);
638 return nullptr;
639 }
640
641 CompileQueue* CompileBroker::c1_compile_queue() {
642 return _c1_compile_queue;
643 }
644
645 CompileQueue* CompileBroker::c2_compile_queue() {
646 return _c2_compile_queue;
647 }
648
649 void CompileBroker::print_compile_queues(outputStream* st) {
650 st->print_cr("Current compiles: ");
651
652 char buf[2000];
653 int buflen = sizeof(buf);
654 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
655
656 st->cr();
657 if (_c1_compile_queue != nullptr) {
658 _c1_compile_queue->print(st);
659 }
660 if (_c2_compile_queue != nullptr) {
661 _c2_compile_queue->print(st);
662 }
663 if (_ac1_compile_queue != nullptr) {
664 _ac1_compile_queue->print(st);
665 }
666 if (_ac2_compile_queue != nullptr) {
667 _ac2_compile_queue->print(st);
668 }
669 }
670
671 void CompileQueue::print(outputStream* st) {
672 assert_locked_or_safepoint(_lock);
673 st->print_cr("%s:", name());
674 CompileTask* task = _first;
675 if (task == nullptr) {
676 st->print_cr("Empty");
677 } else {
678 while (task != nullptr) {
679 task->print(st, nullptr, true, true);
680 task = task->next();
681 }
682 }
683 st->cr();
684 }
685
686 void CompileQueue::print_tty() {
687 stringStream ss;
688 // Dump the compile queue into a buffer before locking the tty
689 print(&ss);
690 {
691 ttyLocker ttyl;
692 tty->print("%s", ss.freeze());
719 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
720 }
721 first_registration = false;
722 #endif // COMPILER2
723 }
724 }
725 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
726
727 // ------------------------------------------------------------------
728 // CompileBroker::compilation_init
729 //
730 // Initialize the Compilation object
731 void CompileBroker::compilation_init(JavaThread* THREAD) {
732 // No need to initialize compilation system if we do not use it.
733 if (!UseCompiler) {
734 return;
735 }
736 // Set the interface to the current compiler(s).
737 _c1_count = CompilationPolicy::c1_count();
738 _c2_count = CompilationPolicy::c2_count();
739 _ac_count = CompilationPolicy::ac_count();
740
741 #if INCLUDE_JVMCI
742 if (EnableJVMCI) {
743 // This is creating a JVMCICompiler singleton.
744 JVMCICompiler* jvmci = new JVMCICompiler();
745
746 if (UseJVMCICompiler) {
747 _compilers[1] = jvmci;
748 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
749 if (BootstrapJVMCI) {
750 // JVMCI will bootstrap so give it more threads
751 _c2_count = MIN2(32, os::active_processor_count());
752 }
753 } else {
754 _c2_count = JVMCIThreads;
755 }
756 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
757 } else {
758 #ifdef COMPILER1
759 _c1_count = JVMCIHostThreads;
876 _perf_last_compile_size =
877 PerfDataManager::create_variable(SUN_CI, "lastSize",
878 PerfData::U_Bytes,
879 (jlong)CompileBroker::no_compile,
880 CHECK);
881
882
883 _perf_last_failed_type =
884 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
885 PerfData::U_None,
886 (jlong)CompileBroker::no_compile,
887 CHECK);
888
889 _perf_last_invalidated_type =
890 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
891 PerfData::U_None,
892 (jlong)CompileBroker::no_compile,
893 CHECK);
894 }
895
896 log_info(aot, codecache, init)("CompileBroker is initialized");
897 _initialized = true;
898 }
899
900 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
901 Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
902 return thread_oop;
903 }
904
905 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
906 CompilationPolicy::replay_training_at_init_loop(thread);
907 }
908
909 #if defined(ASSERT) && COMPILER2_OR_JVMCI
910 // Entry for DeoptimizeObjectsALotThread. The threads are started in
911 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
912 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
913 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
914 bool enter_single_loop;
915 {
916 MonitorLocker ml(dt, EscapeBarrier_lock, Mutex::_no_safepoint_check_flag);
917 static int single_thread_count = 0;
918 enter_single_loop = single_thread_count++ < DeoptimizeObjectsALotThreadCountSingle;
919 }
920 if (enter_single_loop) {
921 dt->deoptimize_objects_alot_loop_single();
922 } else {
923 dt->deoptimize_objects_alot_loop_all();
924 }
1048 }
1049
1050 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1051 char name_buffer[256];
1052 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1053 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1054 return JNIHandles::make_global(thread_oop);
1055 }
1056
1057 static void print_compiler_threads(stringStream& msg) {
1058 if (TraceCompilerThreads) {
1059 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1060 }
1061 LogTarget(Debug, jit, thread) lt;
1062 if (lt.is_enabled()) {
1063 LogStream ls(lt);
1064 ls.print_cr("%s", msg.as_string());
1065 }
1066 }
1067
1068 static void print_compiler_thread(JavaThread *ct) {
1069 if (trace_compiler_threads()) {
1070 ResourceMark rm;
1071 ThreadsListHandle tlh; // name() depends on the TLH.
1072 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1073 stringStream msg;
1074 msg.print("Added initial compiler thread %s", ct->name());
1075 print_compiler_threads(msg);
1076 }
1077 }
1078
1079 void CompileBroker::init_compiler_threads() {
1080 // Ensure any exceptions lead to vm_exit_during_initialization.
1081 EXCEPTION_MARK;
1082 #if !defined(ZERO)
1083 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1084 #endif // !ZERO
1085 // Initialize the compilation queue
1086 if (_c2_count > 0) {
1087 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1088 _c2_compile_queue = new CompileQueue(name, MethodCompileQueueC2_lock);
1089 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1090 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1091 }
1092 if (_c1_count > 0) {
1093 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1094 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1095 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1096 }
1097
1098 if (_ac_count > 0) {
1099 if (_c1_count > 0) { // C1 is present
1100 _ac1_compile_queue = new CompileQueue("C1 AOT code compile queue", MethodCompileQueueSC1_lock);
1101 }
1102 if (_c2_count > 0) { // C2 is present
1103 _ac2_compile_queue = new CompileQueue("C2 AOT code compile queue", MethodCompileQueueSC2_lock);
1104 }
1105 _ac_objects = NEW_C_HEAP_ARRAY(jobject, _ac_count, mtCompiler);
1106 _ac_logs = NEW_C_HEAP_ARRAY(CompileLog*, _ac_count, mtCompiler);
1107 }
1108 char name_buffer[256];
1109
1110 for (int i = 0; i < _c2_count; i++) {
1111 // Create a name for our thread.
1112 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1113 _compiler2_objects[i] = thread_handle;
1114 _compiler2_logs[i] = nullptr;
1115
1116 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1117 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1118 assert(ct != nullptr, "should have been handled for initial thread");
1119 _compilers[1]->set_num_compiler_threads(i + 1);
1120 print_compiler_thread(ct);
1121 }
1122 }
1123
1124 for (int i = 0; i < _c1_count; i++) {
1125 // Create a name for our thread.
1126 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1127 _compiler1_objects[i] = thread_handle;
1128 _compiler1_logs[i] = nullptr;
1129
1130 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1131 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1132 assert(ct != nullptr, "should have been handled for initial thread");
1133 _compilers[0]->set_num_compiler_threads(i + 1);
1134 print_compiler_thread(ct);
1135 }
1136 }
1137
1138 if (_ac_count > 0) {
1139 int i = 0;
1140 if (_c1_count > 0) { // C1 is present
1141 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 1);
1142 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1143 jobject thread_handle = JNIHandles::make_global(thread_oop);
1144 _ac_objects[i] = thread_handle;
1145 _ac_logs[i] = nullptr;
1146 i++;
1147
1148 JavaThread *ct = make_thread(compiler_t, thread_handle, _ac1_compile_queue, _compilers[0], THREAD);
1149 assert(ct != nullptr, "should have been handled for initial thread");
1150 print_compiler_thread(ct);
1151 }
1152 if (_c2_count > 0) { // C2 is present
1153 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d AOT code caching CompilerThread", 2);
1154 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1155 jobject thread_handle = JNIHandles::make_global(thread_oop);
1156 _ac_objects[i] = thread_handle;
1157 _ac_logs[i] = nullptr;
1158
1159 JavaThread *ct = make_thread(compiler_t, thread_handle, _ac2_compile_queue, _compilers[1], THREAD);
1160 assert(ct != nullptr, "should have been handled for initial thread");
1161 print_compiler_thread(ct);
1162 }
1163 }
1164
1165 if (UsePerfData) {
1166 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
1167 }
1168
1169 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1170 if (DeoptimizeObjectsALot) {
1171 // Initialize and start the object deoptimizer threads
1172 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1173 for (int count = 0; count < total_count; count++) {
1174 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1175 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1176 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1177 }
1178 }
1179 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1180 }
1181
1182 void CompileBroker::init_training_replay() {
1183 // Ensure any exceptions lead to vm_exit_during_initialization.
1184 EXCEPTION_MARK;
1185 if (TrainingData::have_data()) {
1186 Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1187 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1188 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1189 }
1190 }
1191
1192 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1193
1194 int old_c2_count = 0, new_c2_count = 0, old_c1_count = 0, new_c1_count = 0;
1195 const int c2_tasks_per_thread = 2, c1_tasks_per_thread = 4;
1196
1197 // Quick check if we already have enough compiler threads without taking the lock.
1198 // Numbers may change concurrently, so we read them again after we have the lock.
1199 if (_c2_compile_queue != nullptr) {
1200 old_c2_count = get_c2_thread_count();
1201 new_c2_count = MIN2(_c2_count, _c2_compile_queue->size() / c2_tasks_per_thread);
1202 }
1203 if (_c1_compile_queue != nullptr) {
1204 old_c1_count = get_c1_thread_count();
1205 new_c1_count = MIN2(_c1_count, _c1_compile_queue->size() / c1_tasks_per_thread);
1206 }
1302 }
1303
1304 CompileThread_lock->unlock();
1305 }
1306
1307
1308 /**
1309 * Set the methods on the stack as on_stack so that redefine classes doesn't
1310 * reclaim them. This method is executed at a safepoint.
1311 */
1312 void CompileBroker::mark_on_stack() {
1313 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1314 // Since we are at a safepoint, we do not need a lock to access
1315 // the compile queues.
1316 if (_c2_compile_queue != nullptr) {
1317 _c2_compile_queue->mark_on_stack();
1318 }
1319 if (_c1_compile_queue != nullptr) {
1320 _c1_compile_queue->mark_on_stack();
1321 }
1322 if (_ac1_compile_queue != nullptr) {
1323 _ac1_compile_queue->mark_on_stack();
1324 }
1325 if (_ac2_compile_queue != nullptr) {
1326 _ac2_compile_queue->mark_on_stack();
1327 }
1328 }
1329
1330 // ------------------------------------------------------------------
1331 // CompileBroker::compile_method
1332 //
1333 // Request compilation of a method.
1334 void CompileBroker::compile_method_base(const methodHandle& method,
1335 int osr_bci,
1336 int comp_level,
1337 int hot_count,
1338 CompileTask::CompileReason compile_reason,
1339 bool requires_online_compilation,
1340 bool blocking,
1341 Thread* thread) {
1342 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1343 assert(method->method_holder()->is_instance_klass(),
1344 "sanity check");
1345 assert(!method->method_holder()->is_not_initialized() ||
1346 compile_reason == CompileTask::Reason_Preload ||
1347 compile_reason == CompileTask::Reason_Precompile ||
1348 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1349 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1350
1351 if (CIPrintRequests) {
1352 tty->print("request: ");
1353 method->print_short_name(tty);
1354 if (osr_bci != InvocationEntryBci) {
1355 tty->print(" osr_bci: %d", osr_bci);
1356 }
1357 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1358 if (hot_count > 0) {
1359 tty->print(" hot: yes");
1360 }
1361 tty->cr();
1362 }
1363
1364 // A request has been made for compilation. Before we do any
1365 // real work, check to see if the method has been compiled
1366 // in the meantime with a definitive result.
1367 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1368 return;
1369 }
1370
1371 #ifndef PRODUCT
1372 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1373 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1374 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1375 return;
1376 }
1377 }
1378 #endif
1379
1380 // If this method is already in the compile queue, then
1381 // we do not block the current thread.
1382 if (compilation_is_in_queue(method)) {
1383 // We may want to decay our counter a bit here to prevent
1384 // multiple denied requests for compilation. This is an
1385 // open compilation policy issue. Note: The other possibility,
1386 // in the case that this is a blocking compile request, is to have
1387 // all subsequent blocking requesters wait for completion of
1388 // ongoing compiles. Note that in this case we'll need a protocol
1389 // for freeing the associated compile tasks. [Or we could have
1390 // a single static monitor on which all these waiters sleep.]
1391 return;
1392 }
1393
1394 // Tiered policy requires MethodCounters to exist before adding a method to
1395 // the queue. Create if we don't have them yet.
1396 method->get_method_counters(thread);
1397
1398 AOTCodeEntry* aot_code_entry = find_aot_code_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1399 bool is_aot = (aot_code_entry != nullptr);
1400 requires_online_compilation = !is_aot; // Request JIT compilation
1401
1402 // Outputs from the following MutexLocker block:
1403 CompileTask* task = nullptr;
1404 CompileQueue* queue = compile_queue(comp_level, is_aot);
1405
1406 // Acquire our lock.
1407 {
1408 ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1409
1410 // Make sure the method has not slipped into the queues since
1411 // last we checked; note that those checks were "fast bail-outs".
1412 // Here we need to be more careful, see 14012000 below.
1413 if (compilation_is_in_queue(method)) {
1414 return;
1415 }
1416
1417 // We need to check again to see if the compilation has
1418 // completed. A previous compilation may have registered
1419 // some result.
1420 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1421 return;
1422 }
1423
1424 // We now know that this compilation is not pending, complete,
1425 // or prohibited. Assign a compile_id to this compilation
1426 // and check to see if it is in our [Start..Stop) range.
1427 int compile_id = assign_compile_id(method, osr_bci);
1428 if (compile_id == 0) {
1429 // The compilation falls outside the allowed range.
1430 return;
1431 }
1432
1433 #if INCLUDE_JVMCI
1434 if (UseJVMCICompiler && blocking) {
1435 // Don't allow blocking compiles for requests triggered by JVMCI.
1436 if (thread->is_Compiler_thread()) {
1437 blocking = false;
1438 }
1439
1440 // In libjvmci, JVMCI initialization should not deadlock with other threads
1490 // <RESULT, QUEUE> :
1491 // <0, 1> : in compile queue, but not yet compiled
1492 // <1, 1> : compiled but queue bit not cleared
1493 // <1, 0> : compiled and queue bit cleared
1494 // Because we first check the queue bits then check the result bits,
1495 // we are assured that we cannot introduce a duplicate task.
1496 // Note that if we did the tests in the reverse order (i.e. check
1497 // result then check queued bit), we could get the result bit before
1498 // the compilation completed, and the queue bit after the compilation
1499 // completed, and end up introducing a "duplicate" (redundant) task.
1500 // In that case, the compiler thread should first check if a method
1501 // has already been compiled before trying to compile it.
1502 // NOTE: in the event that there are multiple compiler threads and
1503 // there is de-optimization/recompilation, things will get hairy,
1504 // and in that case it's best to protect both the testing (here) of
1505 // these bits, and their updating (here and elsewhere) under a
1506 // common lock.
1507 task = create_compile_task(queue,
1508 compile_id, method,
1509 osr_bci, comp_level,
1510 hot_count, aot_code_entry, compile_reason,
1511 requires_online_compilation, blocking);
1512
1513 if (task->is_aot_load() && (_ac_count > 0)) {
1514 // Put it on AOT code caching queue
1515 queue = is_c1_compile(comp_level) ? _ac1_compile_queue : _ac2_compile_queue;
1516 }
1517
1518 if (UseLockFreeCompileQueues) {
1519 assert(queue->lock()->owned_by_self() == false, "");
1520 queue->add_pending(task);
1521 } else {
1522 queue->add(task);
1523 }
1524 }
1525
1526 if (blocking) {
1527 wait_for_completion(task);
1528 }
1529 }
1530
1531 AOTCodeEntry* CompileBroker::find_aot_code_entry(const methodHandle& method, int osr_bci, int comp_level,
1532 CompileTask::CompileReason compile_reason,
1533 bool requires_online_compilation) {
1534 if (requires_online_compilation || compile_reason == CompileTask::Reason_Whitebox) {
1535 return nullptr; // Need normal JIT compilation
1536 }
1537 AOTCodeEntry* aot_code_entry = nullptr;
1538 if (osr_bci == InvocationEntryBci && AOTCodeCache::is_using_code()) {
1539 // Check for AOT preload code first.
1540 if (compile_reason == CompileTask::Reason_Preload) {
1541 aot_code_entry = method->aot_code_entry();
1542 assert(aot_code_entry != nullptr && aot_code_entry->for_preload(), "sanity");
1543 } else {
1544 aot_code_entry = AOTCodeCache::find_code_entry(method, comp_level);
1545 }
1546 }
1547 return aot_code_entry;
1548 }
1549
1550 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1551 int comp_level,
1552 int hot_count,
1553 bool requires_online_compilation,
1554 CompileTask::CompileReason compile_reason,
1555 TRAPS) {
1556 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1557 if (!_initialized || comp_level == CompLevel_none) {
1558 return nullptr;
1559 }
1560
1561 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1562 assert(comp != nullptr, "Ensure we have a compiler");
1563
1564 #if INCLUDE_JVMCI
1565 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1566 // JVMCI compilation is not yet initializable.
1567 return nullptr;
1568 }
1569 #endif
1570
1571 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1572 // CompileBroker::compile_method can trap and can have pending async exception.
1573 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1574 DirectivesStack::release(directive);
1575 return nm;
1576 }
1577
1578 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1579 int comp_level,
1580 int hot_count,
1581 bool requires_online_compilation,
1582 CompileTask::CompileReason compile_reason,
1583 DirectiveSet* directive,
1584 TRAPS) {
1585
1586 // make sure arguments make sense
1587 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1588 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1589 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1590 assert(!method->method_holder()->is_not_initialized() ||
1591 compile_reason == CompileTask::Reason_Preload ||
1592 compile_reason == CompileTask::Reason_Precompile ||
1593 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1594 // return quickly if possible
1595 bool aot_compilation = (PrecompileCode && PrecompileOnlyAndExit) ||
1596 CDSConfig::is_dumping_aot_code();
1597 if (aot_compilation && !CompileTask::reason_is_precompile(compile_reason)) {
1598 // Skip normal compilations when compiling AOT code
1599 return nullptr;
1600 }
1601
1602 // lock, make sure that the compilation
1603 // isn't prohibited in a straightforward way.
1604 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1605 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1606 return nullptr;
1607 }
1608
1609 if (osr_bci == InvocationEntryBci) {
1610 // standard compilation
1611 nmethod* method_code = method->code();
1612 if (method_code != nullptr) {
1613 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1614 return method_code;
1615 }
1616 }
1617 if (method->is_not_compilable(comp_level)) {
1618 return nullptr;
1619 }
1620 } else {
1621 // osr compilation
1622 // We accept a higher level osr method
1623 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1624 if (nm != nullptr) return nm;
1625 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1626 }
1627
1628 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1629 // some prerequisites that are compiler specific
1630 if (compile_reason != CompileTask::Reason_Preload &&
1631 !CompileTask::reason_is_precompile(compile_reason) &&
1632 (comp->is_c2() || comp->is_jvmci())) {
1633 InternalOOMEMark iom(THREAD);
1634 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1635 // Resolve all classes seen in the signature of the method
1636 // we are compiling.
1637 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1638 }
1639
1640 // If the method is native, do the lookup in the thread requesting
1641 // the compilation. Native lookups can load code, which is not
1642 // permitted during compilation.
1643 //
1644 // Note: A native method implies non-osr compilation which is
1645 // checked with an assertion at the entry of this method.
1646 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1647 address adr = NativeLookup::lookup(method, THREAD);
1648 if (HAS_PENDING_EXCEPTION) {
1649 // In case of an exception looking up the method, we just forget
1650 // about it. The interpreter will kick-in and throw the exception.
1651 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1652 CLEAR_PENDING_EXCEPTION;
1667 }
1668
1669 // do the compilation
1670 if (method->is_native()) {
1671 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1672 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1673 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1674 //
1675 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1676 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1677 AdapterHandlerLibrary::create_native_wrapper(method);
1678 } else {
1679 return nullptr;
1680 }
1681 } else {
1682 // If the compiler is shut off due to code cache getting full
1683 // fail out now so blocking compiles dont hang the java thread
1684 if (!should_compile_new_jobs()) {
1685 return nullptr;
1686 }
1687 bool is_blocking = ReplayCompiles ||
1688 !directive->BackgroundCompilationOption ||
1689 (PreloadBlocking && (compile_reason == CompileTask::Reason_Preload));
1690 compile_method_base(method, osr_bci, comp_level, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1691 }
1692
1693 // return requested nmethod
1694 // We accept a higher level osr method
1695 if (osr_bci == InvocationEntryBci) {
1696 return method->code();
1697 }
1698 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1699 }
1700
1701
1702 // ------------------------------------------------------------------
1703 // CompileBroker::compilation_is_complete
1704 //
1705 // See if compilation of this method is already complete.
1706 bool CompileBroker::compilation_is_complete(Method* method,
1707 int osr_bci,
1708 int comp_level,
1709 bool online_only,
1710 CompileTask::CompileReason compile_reason) {
1711 if (compile_reason == CompileTask::Reason_Precompile ||
1712 compile_reason == CompileTask::Reason_PrecompileForPreload) {
1713 return false; // FIXME: any restrictions?
1714 }
1715 bool is_osr = (osr_bci != standard_entry_bci);
1716 if (is_osr) {
1717 if (method->is_not_osr_compilable(comp_level)) {
1718 return true;
1719 } else {
1720 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1721 return (result != nullptr);
1722 }
1723 } else {
1724 if (method->is_not_compilable(comp_level)) {
1725 return true;
1726 } else {
1727 nmethod* result = method->code();
1728 if (result == nullptr) {
1729 return false;
1730 }
1731 if (online_only && result->is_aot()) {
1732 return false;
1733 }
1734 bool same_level = (comp_level == result->comp_level());
1735 if (result->preloaded() || result->has_clinit_barriers()) {
1736 return !same_level; // Allow replace preloaded code with new code of the same level
1737 }
1738 return same_level;
1739 }
1740 }
1741 }
1742
1743
1744 /**
1745 * See if this compilation is already requested.
1746 *
1747 * Implementation note: there is only a single "is in queue" bit
1748 * for each method. This means that the check below is overly
1749 * conservative in the sense that an osr compilation in the queue
1750 * will block a normal compilation from entering the queue (and vice
1751 * versa). This can be remedied by a full queue search to disambiguate
1752 * cases. If it is deemed profitable, this may be done.
1753 */
1754 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1755 return method->queued_for_compilation();
1756 }
1757
1758 // ------------------------------------------------------------------
1818 if (CIStart <= id && id < CIStop) {
1819 return id;
1820 }
1821 }
1822
1823 // Method was not in the appropriate compilation range.
1824 method->set_not_compilable_quietly("Not in requested compile id range");
1825 return 0;
1826 #else
1827 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1828 // only _compilation_id is incremented.
1829 return AtomicAccess::add(&_compilation_id, 1);
1830 #endif
1831 }
1832
1833 // ------------------------------------------------------------------
1834 // CompileBroker::assign_compile_id_unlocked
1835 //
1836 // Public wrapper for assign_compile_id that acquires the needed locks
1837 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1838 return assign_compile_id(method, osr_bci);
1839 }
1840
1841 // ------------------------------------------------------------------
1842 // CompileBroker::create_compile_task
1843 //
1844 // Create a CompileTask object representing the current request for
1845 // compilation. Add this task to the queue.
1846 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1847 int compile_id,
1848 const methodHandle& method,
1849 int osr_bci,
1850 int comp_level,
1851 int hot_count,
1852 AOTCodeEntry* aot_code_entry,
1853 CompileTask::CompileReason compile_reason,
1854 bool requires_online_compilation,
1855 bool blocking) {
1856 CompileTask* new_task = new CompileTask(compile_id, method, osr_bci, comp_level,
1857 hot_count, aot_code_entry, compile_reason, queue,
1858 requires_online_compilation, blocking);
1859 return new_task;
1860 }
1861
1862 #if INCLUDE_JVMCI
1863 // The number of milliseconds to wait before checking if
1864 // JVMCI compilation has made progress.
1865 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1866
1867 // The number of JVMCI compilation progress checks that must fail
1868 // before unblocking a thread waiting for a blocking compilation.
1869 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1870
1871 /**
1872 * Waits for a JVMCI compiler to complete a given task. This thread
1873 * waits until either the task completes or it sees no JVMCI compilation
1874 * progress for N consecutive milliseconds where N is
1875 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1876 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1877 *
1878 * @return true if this thread needs to delete the task
1992 * compiler threads can start compiling.
1993 */
1994 bool CompileBroker::init_compiler_runtime() {
1995 CompilerThread* thread = CompilerThread::current();
1996 AbstractCompiler* comp = thread->compiler();
1997 // Final sanity check - the compiler object must exist
1998 guarantee(comp != nullptr, "Compiler object must exist");
1999
2000 {
2001 // Must switch to native to allocate ci_env
2002 ThreadToNativeFromVM ttn(thread);
2003 ciEnv ci_env((CompileTask*)nullptr);
2004 // Cache Jvmti state
2005 ci_env.cache_jvmti_state();
2006 // Cache DTrace flags
2007 ci_env.cache_dtrace_flags();
2008
2009 // Switch back to VM state to do compiler initialization
2010 ThreadInVMfromNative tv(thread);
2011
2012 comp->initialize();
2013 }
2014
2015 if (comp->is_failed()) {
2016 disable_compilation_forever();
2017 // If compiler initialization failed, no compiler thread that is specific to a
2018 // particular compiler runtime will ever start to compile methods.
2019 shutdown_compiler_runtime(comp, thread);
2020 return false;
2021 }
2022
2023 // C1 specific check
2024 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2025 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2026 return false;
2027 }
2028
2029 return true;
2030 }
2031
2032 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2033 BufferBlob* blob = thread->get_buffer_blob();
2034 if (blob != nullptr) {
2035 blob->purge();
2036 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2037 CodeCache::free(blob);
2038 }
2039 }
2040
2041 /**
2042 * If C1 and/or C2 initialization failed, we shut down all compilation.
2043 * We do this to keep things simple. This can be changed if it ever turns
2044 * out to be a problem.
2045 */
2046 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2047 free_buffer_blob_if_allocated(thread);
2048
2049 log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2050
2051 if (comp->should_perform_shutdown()) {
2052 // There are two reasons for shutting down the compiler
2053 // 1) compiler runtime initialization failed
2054 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2055 warning("%s initialization failed. Shutting down all compilers", comp->name());
2056
2057 // Only one thread per compiler runtime object enters here
2058 // Set state to shut down
2059 comp->set_shut_down();
2060
2061 // Delete all queued compilation tasks to make compiler threads exit faster.
2062 if (_c1_compile_queue != nullptr) {
2063 _c1_compile_queue->delete_all();
2064 }
2065
2066 if (_c2_compile_queue != nullptr) {
2067 _c2_compile_queue->delete_all();
2068 }
2069
2070 // Set flags so that we continue execution with using interpreter only.
2074 // We could delete compiler runtimes also. However, there are references to
2075 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
2076 // fail. This can be done later if necessary.
2077 }
2078 }
2079
2080 /**
2081 * Helper function to create new or reuse old CompileLog.
2082 */
2083 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2084 if (!LogCompilation) return nullptr;
2085
2086 AbstractCompiler *compiler = ct->compiler();
2087 bool c1 = compiler->is_c1();
2088 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
2089 assert(compiler_objects != nullptr, "must be initialized at this point");
2090 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
2091 assert(logs != nullptr, "must be initialized at this point");
2092 int count = c1 ? _c1_count : _c2_count;
2093
2094 if (ct->queue() == _ac1_compile_queue || ct->queue() == _ac2_compile_queue) {
2095 compiler_objects = _ac_objects;
2096 logs = _ac_logs;
2097 count = _ac_count;
2098 }
2099 // Find Compiler number by its threadObj.
2100 oop compiler_obj = ct->threadObj();
2101 int compiler_number = 0;
2102 bool found = false;
2103 for (; compiler_number < count; compiler_number++) {
2104 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2105 found = true;
2106 break;
2107 }
2108 }
2109 assert(found, "Compiler must exist at this point");
2110
2111 // Determine pointer for this thread's log.
2112 CompileLog** log_ptr = &logs[compiler_number];
2113
2114 // Return old one if it exists.
2115 CompileLog* log = *log_ptr;
2116 if (log != nullptr) {
2117 ct->init_log(log);
2118 return log;
2160 if (!thread->init_compilation_timeout()) {
2161 return;
2162 }
2163
2164 // If compiler thread/runtime initialization fails, exit the compiler thread
2165 if (!init_compiler_runtime()) {
2166 return;
2167 }
2168
2169 thread->start_idle_timer();
2170
2171 // Poll for new compilation tasks as long as the JVM runs. Compilation
2172 // should only be disabled if something went wrong while initializing the
2173 // compiler runtimes. This, in turn, should not happen. The only known case
2174 // when compiler runtime initialization fails is if there is not enough free
2175 // space in the code cache to generate the necessary stubs, etc.
2176 while (!is_compilation_disabled_forever()) {
2177 // We need this HandleMark to avoid leaking VM handles.
2178 HandleMark hm(thread);
2179
2180 RecompilationPolicy::recompilation_step(AOTRecompilationWorkUnitSize, thread);
2181
2182 CompileTask* task = queue->get(thread);
2183 if (task == nullptr) {
2184 if (UseDynamicNumberOfCompilerThreads) {
2185 // Access compiler_count under lock to enforce consistency.
2186 MutexLocker only_one(CompileThread_lock);
2187 if (can_remove(thread, true)) {
2188 if (trace_compiler_threads()) {
2189 ResourceMark rm;
2190 stringStream msg;
2191 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2192 thread->name(), thread->idle_time_millis());
2193 print_compiler_threads(msg);
2194 }
2195
2196 // Notify compiler that the compiler thread is about to stop
2197 thread->compiler()->stopping_compiler_thread(thread);
2198
2199 free_buffer_blob_if_allocated(thread);
2200 return; // Stop this thread.
2201 }
2202 }
2203 } else {
2204 // Assign the task to the current thread. Mark this compilation
2205 // thread as active for the profiler.
2206 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2207 // occurs after fetching the compile task off the queue.
2208 CompileTaskWrapper ctw(task);
2209 methodHandle method(thread, task->method());
2210
2211 // Never compile a method if breakpoints are present in it
2212 if (method()->number_of_breakpoints() == 0) {
2213 // Compile the method.
2214 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2215 invoke_compiler_on_method(task);
2216 thread->start_idle_timer();
2217 } else {
2218 // After compilation is disabled, remove remaining methods from queue
2219 method->clear_queued_for_compilation();
2220 method->set_pending_queue_processed(false);
2221 task->set_failure_reason("compilation is disabled");
2222 }
2223 } else {
2224 task->set_failure_reason("breakpoints are present");
2225 }
2226
2227 // Don't use AOT compielr threads for dynamic C1 and C2 threads creation.
2228 if (UseDynamicNumberOfCompilerThreads &&
2229 (queue == _c1_compile_queue || queue == _c2_compile_queue)) {
2230 possibly_add_compiler_threads(thread);
2231 assert(!thread->has_pending_exception(), "should have been handled");
2232 }
2233 }
2234 }
2235
2236 // Shut down compiler runtime
2237 shutdown_compiler_runtime(thread->compiler(), thread);
2238 }
2239
2240 // ------------------------------------------------------------------
2241 // CompileBroker::init_compiler_thread_log
2242 //
2243 // Set up state required by +LogCompilation.
2244 void CompileBroker::init_compiler_thread_log() {
2245 CompilerThread* thread = CompilerThread::current();
2246 char file_name[4*K];
2247 FILE* fp = nullptr;
2248 intx thread_id = os::current_thread_id();
2249 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
2405
2406 // Acquires Compilation_lock and waits for it to be notified
2407 // as long as WhiteBox::compilation_locked is true.
2408 static void whitebox_lock_compilation() {
2409 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2410 while (WhiteBox::compilation_locked) {
2411 locker.wait();
2412 }
2413 }
2414
2415 // ------------------------------------------------------------------
2416 // CompileBroker::invoke_compiler_on_method
2417 //
2418 // Compile a method.
2419 //
2420 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2421 task->print_ul();
2422 elapsedTimer time;
2423
2424 DirectiveSet* directive = task->directive();
2425
2426 CompilerThread* thread = CompilerThread::current();
2427 ResourceMark rm(thread);
2428
2429 if (CompilationLog::log() != nullptr) {
2430 CompilationLog::log()->log_compile(thread, task);
2431 }
2432
2433 // Common flags.
2434 int compile_id = task->compile_id();
2435 int osr_bci = task->osr_bci();
2436 bool is_osr = (osr_bci != standard_entry_bci);
2437 bool should_log = (thread->log() != nullptr);
2438 bool should_break = false;
2439 bool should_print_compilation = PrintCompilation || directive->PrintCompilationOption;
2440 const int task_level = task->comp_level();
2441 AbstractCompiler* comp = task->compiler();
2442 {
2443 // create the handle inside it's own block so it can't
2444 // accidentally be referenced once the thread transitions to
2445 // native. The NoHandleMark before the transition should catch
2446 // any cases where this occurs in the future.
2447 methodHandle method(thread, task->method());
2448
2449 assert(!method->is_native(), "no longer compile natives");
2450
2451 // Update compile information when using perfdata.
2452 if (UsePerfData) {
2453 update_compile_perf_data(thread, method, is_osr);
2454 }
2455
2456 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2457 }
2458
2459 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2554 ci_env.record_method_not_compilable("redefined method", true);
2555 }
2556
2557 // Cache DTrace flags
2558 ci_env.cache_dtrace_flags();
2559
2560 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2561
2562 TraceTime t1("compilation", &time);
2563 EventCompilation event;
2564
2565 if (comp == nullptr) {
2566 ci_env.record_method_not_compilable("no compiler");
2567 } else if (!ci_env.failing()) {
2568 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2569 whitebox_lock_compilation();
2570 }
2571 comp->compile_method(&ci_env, target, osr_bci, true, directive);
2572
2573 /* Repeat compilation without installing code for profiling purposes */
2574 int repeat_compilation_count = task->is_aot_load() ? 0 : directive->RepeatCompilationOption;
2575 if (repeat_compilation_count > 0) {
2576 CHeapStringHolder failure_reason;
2577 failure_reason.set(ci_env._failure_reason.get());
2578 while (repeat_compilation_count > 0) {
2579 ResourceMark rm(thread);
2580 task->print_ul("NO CODE INSTALLED");
2581 thread->timeout()->reset();
2582 ci_env._failure_reason.clear();
2583 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2584 repeat_compilation_count--;
2585 }
2586 ci_env._failure_reason.set(failure_reason.get());
2587 }
2588 }
2589
2590
2591 if (!ci_env.failing() && !task->is_success() && !task->is_precompile()) {
2592 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2593 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2594 // The compiler elected, without comment, not to register a result.
2595 // Do not attempt further compilations of this method.
2596 ci_env.record_method_not_compilable("compile failed");
2597 }
2598
2599 // Copy this bit to the enclosing block:
2600 compilable = ci_env.compilable();
2601
2602 if (ci_env.failing()) {
2603 // Duplicate the failure reason string, so that it outlives ciEnv
2604 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2605 failure_reason_on_C_heap = true;
2606 retry_message = ci_env.retry_message();
2607 ci_env.report_failure(failure_reason);
2608 }
2609
2610 if (ci_env.failing()) {
2611 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2612 }
2613 if (event.should_commit()) {
2614 post_compilation_event(event, task);
2615 }
2616 }
2617
2618 if (failure_reason != nullptr) {
2619 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2620 if (CompilationLog::log() != nullptr) {
2621 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2622 }
2623 if (PrintCompilation || directive->PrintCompilationOption) {
2624 FormatBufferResource msg = retry_message != nullptr ?
2625 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2626 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2627 task->print(tty, msg);
2628 }
2629 }
2630
2631 task->mark_finished(os::elapsed_counter());
2632 DirectivesStack::release(directive);
2633
2634 methodHandle method(thread, task->method());
2635
2636 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2637
2638 collect_statistics(thread, time, task);
2639
2640 if (PrintCompilation && PrintCompilation2) {
2641 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2642 tty->print("%4d ", compile_id); // print compilation number
2643 tty->print("%s ", (is_osr ? "%" : (task->is_aot_load() ? (task->preload() ? "P" : "A") : " ")));
2644 if (task->is_success()) {
2645 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2646 }
2647 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2648 }
2649
2650 Log(compilation, codecache) log;
2651 if (log.is_debug()) {
2652 LogStream ls(log.debug());
2653 codecache_print(&ls, /* detailed= */ false);
2654 }
2655 if (PrintCodeCacheOnCompilation) {
2656 codecache_print(/* detailed= */ false);
2657 }
2658 // Disable compilation, if required.
2659 switch (compilable) {
2660 case ciEnv::MethodCompilable_never:
2661 if (is_osr)
2662 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2663 else
2664 method->set_not_compilable_quietly("MethodCompilable_never");
2665 break;
2666 case ciEnv::MethodCompilable_not_at_tier:
2667 if (is_osr)
2668 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2669 else
2670 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2671 break;
2672 }
2673
2674 // Note that the queued_for_compilation bits are cleared without
2675 // protection of a mutex. [They were set by the requester thread,
2676 // when adding the task to the compile queue -- at which time the
2677 // compile queue lock was held. Subsequently, we acquired the compile
2678 // queue lock to get this task off the compile queue; thus (to belabour
2679 // the point somewhat) our clearing of the bits must be occurring
2680 // only after the setting of the bits. See also 14012000 above.
2681 method->clear_queued_for_compilation();
2682 method->set_pending_queue_processed(false);
2683
2684 if (should_print_compilation) {
2685 ResourceMark rm;
2686 task->print_tty();
2687 }
2688 }
2689
2690 /**
2691 * The CodeCache is full. Print warning and disable compilation.
2692 * Schedule code cache cleaning so compilation can continue later.
2693 * This function needs to be called only from CodeCache::allocate(),
2694 * since we currently handle a full code cache uniformly.
2695 */
2696 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2697 UseInterpreter = true;
2698 if (UseCompiler || AlwaysCompileLoopMethods ) {
2699 if (xtty != nullptr) {
2700 stringStream s;
2701 // Dump code cache state into a buffer before locking the tty,
2702 // because log_state() will use locks causing lock conflicts.
2703 CodeCache::log_state(&s);
2704 // Lock to prevent tearing
2705 ttyLocker ttyl;
2706 xtty->begin_elem("code_cache_full");
2707 xtty->print("%s", s.freeze());
2780 // CompileBroker::collect_statistics
2781 //
2782 // Collect statistics about the compilation.
2783
2784 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2785 bool success = task->is_success();
2786 methodHandle method (thread, task->method());
2787 int compile_id = task->compile_id();
2788 bool is_osr = (task->osr_bci() != standard_entry_bci);
2789 const int comp_level = task->comp_level();
2790 CompilerCounters* counters = thread->counters();
2791
2792 MutexLocker locker(CompileStatistics_lock);
2793
2794 // _perf variables are production performance counters which are
2795 // updated regardless of the setting of the CITime and CITimeEach flags
2796 //
2797
2798 // account all time, including bailouts and failures in this counter;
2799 // C1 and C2 counters are counting both successful and unsuccessful compiles
2800 _t_total_compilation.add(&time);
2801
2802 // Update compilation times. Used by the implementation of JFR CompilerStatistics
2803 // and java.lang.management.CompilationMXBean.
2804 _perf_total_compilation->inc(time.ticks());
2805 _peak_compilation_time = MAX2(time.milliseconds(), _peak_compilation_time);
2806
2807 if (!success) {
2808 _total_bailout_count++;
2809 if (UsePerfData) {
2810 _perf_last_failed_method->set_value(counters->current_method());
2811 _perf_last_failed_type->set_value(counters->compile_type());
2812 _perf_total_bailout_count->inc();
2813 }
2814 _t_bailedout_compilation.add(&time);
2815
2816 if (CITime || log_is_enabled(Info, init)) {
2817 CompilerStatistics* stats = nullptr;
2818 if (task->is_aot_load()) {
2819 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2820 stats = &_aot_stats_per_level[level];
2821 } else {
2822 stats = &_stats_per_level[comp_level-1];
2823 }
2824 stats->_bailout.update(time, 0);
2825 }
2826 } else if (!task->is_success()) {
2827 if (UsePerfData) {
2828 _perf_last_invalidated_method->set_value(counters->current_method());
2829 _perf_last_invalidated_type->set_value(counters->compile_type());
2830 _perf_total_invalidated_count->inc();
2831 }
2832 _total_invalidated_count++;
2833 _t_invalidated_compilation.add(&time);
2834
2835 if (CITime || log_is_enabled(Info, init)) {
2836 CompilerStatistics* stats = nullptr;
2837 if (task->is_aot_load()) {
2838 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2839 stats = &_aot_stats_per_level[level];
2840 } else {
2841 stats = &_stats_per_level[comp_level-1];
2842 }
2843 stats->_invalidated.update(time, 0);
2844 }
2845 } else {
2846 // Compilation succeeded
2847 if (CITime || log_is_enabled(Info, init)) {
2848 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2849 if (is_osr) {
2850 _t_osr_compilation.add(&time);
2851 _sum_osr_bytes_compiled += bytes_compiled;
2852 } else {
2853 _t_standard_compilation.add(&time);
2854 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2855 }
2856
2857 // Collect statistic per compilation level
2858 if (task->is_aot_load()) {
2859 _aot_stats._standard.update(time, bytes_compiled);
2860 _aot_stats._nmethods_size += task->nm_total_size();
2861 _aot_stats._nmethods_code_size += task->nm_insts_size();
2862 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2863 CompilerStatistics* stats = &_aot_stats_per_level[level];
2864 stats->_standard.update(time, bytes_compiled);
2865 stats->_nmethods_size += task->nm_total_size();
2866 stats->_nmethods_code_size += task->nm_insts_size();
2867 } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2868 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2869 if (is_osr) {
2870 stats->_osr.update(time, bytes_compiled);
2871 } else {
2872 stats->_standard.update(time, bytes_compiled);
2873 }
2874 stats->_nmethods_size += task->nm_total_size();
2875 stats->_nmethods_code_size += task->nm_insts_size();
2876 } else {
2877 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2878 }
2879
2880 // Collect statistic per compiler
2881 AbstractCompiler* comp = task->compiler();
2882 if (comp && !task->is_aot_load()) {
2883 CompilerStatistics* stats = comp->stats();
2884 if (is_osr) {
2885 stats->_osr.update(time, bytes_compiled);
2886 } else {
2887 stats->_standard.update(time, bytes_compiled);
2888 }
2889 stats->_nmethods_size += task->nm_total_size();
2890 stats->_nmethods_code_size += task->nm_insts_size();
2891 } else if (!task->is_aot_load()) { // if (!comp)
2892 assert(false, "Compiler object must exist");
2893 }
2894 }
2895
2896 if (UsePerfData) {
2897 // save the name of the last method compiled
2898 _perf_last_method->set_value(counters->current_method());
2899 _perf_last_compile_type->set_value(counters->compile_type());
2900 _perf_last_compile_size->set_value(method->code_size() +
2901 task->num_inlined_bytecodes());
2902 if (is_osr) {
2903 _perf_osr_compilation->inc(time.ticks());
2904 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2905 } else {
2906 _perf_standard_compilation->inc(time.ticks());
2907 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2908 }
2909 }
2910
2911 if (CITimeEach) {
2934 _total_standard_compile_count++;
2935 }
2936 }
2937 // set the current method for the thread to null
2938 if (UsePerfData) counters->set_current_method("");
2939 }
2940
2941 const char* CompileBroker::compiler_name(int comp_level) {
2942 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2943 if (comp == nullptr) {
2944 return "no compiler";
2945 } else {
2946 return (comp->name());
2947 }
2948 }
2949
2950 jlong CompileBroker::total_compilation_ticks() {
2951 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2952 }
2953
2954 void CompileBroker::log_not_entrant(nmethod* nm) {
2955 _total_not_entrant_count++;
2956 if (CITime || log_is_enabled(Info, init)) {
2957 CompilerStatistics* stats = nullptr;
2958 int level = nm->comp_level();
2959 if (nm->is_aot()) {
2960 if (nm->preloaded()) {
2961 assert(level == CompLevel_full_optimization, "%d", level);
2962 level = CompLevel_full_optimization + 1;
2963 }
2964 stats = &_aot_stats_per_level[level - 1];
2965 } else {
2966 stats = &_stats_per_level[level - 1];
2967 }
2968 stats->_made_not_entrant._count++;
2969 }
2970 }
2971
2972 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2973 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}",
2974 name, stats->bytes_per_second(),
2975 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2976 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2977 stats->_nmethods_size, stats->_nmethods_code_size);
2978 }
2979
2980 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
2981 if (data._count > 0) {
2982 st->print("; %s: %4u methods", name, data._count);
2983 if (print_time) {
2984 st->print(" (in %.3fs)", data._time.seconds());
2985 }
2986 }
2987 }
2988
2989 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
2990 st->print(" %s%d: %5u methods", prefix, tier, stats->_standard._count);
2991 if (stats->_standard._count > 0) {
2992 st->print(" (in %.3fs)", stats->_standard._time.seconds());
2993 }
2994 print_helper(st, "osr", stats->_osr);
2995 print_helper(st, "bailout", stats->_bailout);
2996 print_helper(st, "invalid", stats->_invalidated);
2997 print_helper(st, "not_entrant", stats->_made_not_entrant, false);
2998 st->cr();
2999 }
3000
3001 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3002 if (queue != nullptr) {
3003 MutexLocker ml(queue->lock());
3004
3005 uint total_cnt = 0;
3006 uint active_cnt = 0;
3007 for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3008 guarantee(jt != nullptr, "");
3009 if (jt->is_Compiler_thread()) {
3010 CompilerThread* ct = (CompilerThread*)jt;
3011
3012 guarantee(ct != nullptr, "");
3013 if (ct->queue() == queue) {
3014 ++total_cnt;
3015 CompileTask* task = ct->task();
3016 if (task != nullptr) {
3017 ++active_cnt;
3018 }
3019 }
3020 }
3021 }
3022
3023 st->print(" %s (%d active / %d total threads): %u tasks",
3024 queue->name(), active_cnt, total_cnt, queue->size());
3025 if (queue->size() > 0) {
3026 uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3027 for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3028 int tier = task->comp_level();
3029 if (task->is_aot_load() && task->preload()) {
3030 assert(tier == CompLevel_full_optimization, "%d", tier);
3031 tier = CompLevel_full_optimization + 1;
3032 }
3033 counts[tier-1]++;
3034 }
3035 st->print(":");
3036 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3037 uint cnt = counts[tier-1];
3038 if (cnt > 0) {
3039 st->print(" T%d: %u tasks;", tier, cnt);
3040 }
3041 }
3042 }
3043 st->cr();
3044
3045 // for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3046 // guarantee(jt != nullptr, "");
3047 // if (jt->is_Compiler_thread()) {
3048 // CompilerThread* ct = (CompilerThread*)jt;
3049 //
3050 // guarantee(ct != nullptr, "");
3051 // if (ct->queue() == queue) {
3052 // ResourceMark rm;
3053 // CompileTask* task = ct->task();
3054 // st->print(" %s: ", ct->name_raw());
3055 // if (task != nullptr) {
3056 // task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3057 // }
3058 // st->cr();
3059 // }
3060 // }
3061 // }
3062 }
3063 }
3064 void CompileBroker::print_statistics_on(outputStream* st) {
3065 st->print_cr(" Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3066 _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3067 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3068 print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3069 }
3070 st->cr();
3071
3072 if (AOTCodeCaching) {
3073 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3074 if (tier != CompLevel_full_profile) {
3075 print_tier_helper(st, "AOT Code T", tier, &_aot_stats_per_level[tier - 1]);
3076 }
3077 }
3078 st->cr();
3079 }
3080
3081 print_queue_info(st, _c1_compile_queue);
3082 print_queue_info(st, _c2_compile_queue);
3083 print_queue_info(st, _ac1_compile_queue);
3084 print_queue_info(st, _ac2_compile_queue);
3085 }
3086
3087 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3088 if (per_compiler) {
3089 if (aggregate) {
3090 tty->cr();
3091 tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3092 tty->print_cr("------------------------------------------------");
3093 tty->cr();
3094 }
3095 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3096 AbstractCompiler* comp = _compilers[i];
3097 if (comp != nullptr) {
3098 print_times(comp->name(), comp->stats());
3099 }
3100 }
3101 if (_aot_stats._standard._count > 0) {
3102 print_times("SC", &_aot_stats);
3103 }
3104 if (aggregate) {
3105 tty->cr();
3106 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3107 tty->print_cr("------------------------------------------------");
3108 tty->cr();
3109 }
3110 char tier_name[256];
3111 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3112 CompilerStatistics* stats = &_stats_per_level[tier-1];
3113 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3114 print_times(tier_name, stats);
3115 }
3116 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3117 CompilerStatistics* stats = &_aot_stats_per_level[tier-1];
3118 if (stats->_standard._bytes > 0) {
3119 os::snprintf_checked(tier_name, sizeof(tier_name), "AOT Code T%d", tier);
3120 print_times(tier_name, stats);
3121 }
3122 }
3123 }
3124
3125 if (!aggregate) {
3126 return;
3127 }
3128
3129 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3130 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3131 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3132
3133 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3134 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3135
3136 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3137 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3138 uint total_compile_count = CompileBroker::_total_compile_count;
3139 uint total_bailout_count = CompileBroker::_total_bailout_count;
3140 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3141
3142 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
3144
3145 tty->cr();
3146 tty->print_cr("Accumulated compiler times");
3147 tty->print_cr("----------------------------------------------------------");
3148 //0000000000111111111122222222223333333333444444444455555555556666666666
3149 //0123456789012345678901234567890123456789012345678901234567890123456789
3150 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
3151 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
3152 standard_compilation.seconds(),
3153 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3154 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
3155 CompileBroker::_t_bailedout_compilation.seconds(),
3156 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3157 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
3158 osr_compilation.seconds(),
3159 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3160 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
3161 CompileBroker::_t_invalidated_compilation.seconds(),
3162 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3163
3164 if (AOTCodeCaching) { // Check flags because AOT code cache could be closed already
3165 tty->cr();
3166 AOTCodeCache::print_timers_on(tty);
3167 }
3168 AbstractCompiler *comp = compiler(CompLevel_simple);
3169 if (comp != nullptr) {
3170 tty->cr();
3171 comp->print_timers();
3172 }
3173 comp = compiler(CompLevel_full_optimization);
3174 if (comp != nullptr) {
3175 tty->cr();
3176 comp->print_timers();
3177 }
3178 #if INCLUDE_JVMCI
3179 if (EnableJVMCI) {
3180 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3181 if (jvmci_comp != nullptr && jvmci_comp != comp) {
3182 tty->cr();
3183 jvmci_comp->print_timers();
3184 }
3185 }
3186 #endif
3187
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