6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "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 "jvm.h"
44 #include "jfr/jfrEvents.hpp"
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/methodData.hpp"
51 #include "oops/method.inline.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/atomic.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(); \
105 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
106 { \
107 Symbol* klass_name = (method)->klass_name(); \
108 Symbol* name = (method)->name(); \
109 Symbol* signature = (method)->signature(); \
110 HOTSPOT_METHOD_COMPILE_END( \
111 (char *) comp_name, strlen(comp_name), \
112 (char *) klass_name->bytes(), klass_name->utf8_length(), \
113 (char *) name->bytes(), name->utf8_length(), \
114 (char *) signature->bytes(), signature->utf8_length(), (success)); \
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 if (log != nullptr && !task->is_unloaded()) task->log_task_start(log);
222 }
223
224 CompileTaskWrapper::~CompileTaskWrapper() {
225 CompilerThread* thread = CompilerThread::current();
226 CompileTask* task = thread->task();
227 CompileLog* log = thread->log();
228 if (log != nullptr && !task->is_unloaded()) task->log_task_done(log);
229 thread->set_task(nullptr);
230 thread->set_env(nullptr);
231 if (task->is_blocking()) {
232 bool free_task = false;
233 {
234 MutexLocker notifier(thread, task->lock());
235 task->mark_complete();
236 #if INCLUDE_JVMCI
237 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
238 if (!task->has_waiter()) {
239 // The waiting thread timed out and thus did not free the task.
240 free_task = true;
241 }
242 task->set_blocking_jvmci_compile_state(nullptr);
243 }
244 #endif
245 if (!free_task) {
246 // Notify the waiting thread that the compilation has completed
247 // so that it can free the task.
248 task->lock()->notify_all();
249 }
250 }
251 if (free_task) {
252 // The task can only be freed once the task lock is released.
253 CompileTask::free(task);
254 }
255 } else {
256 task->mark_complete();
257
258 // By convention, the compiling thread is responsible for
259 // recycling a non-blocking CompileTask.
260 CompileTask::free(task);
261 }
262 }
263
264 /**
265 * Check if a CompilerThread can be removed and update count if requested.
266 */
267 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
268 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
269 if (!ReduceNumberOfCompilerThreads) return false;
270
271 AbstractCompiler *compiler = ct->compiler();
272 int compiler_count = compiler->num_compiler_threads();
273 bool c1 = compiler->is_c1();
274
275 // Keep at least 1 compiler thread of each type.
276 if (compiler_count < 2) return false;
277
278 // Keep thread alive for at least some time.
279 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
280
281 #if INCLUDE_JVMCI
282 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
283 // Handles for JVMCI thread objects may get released concurrently.
284 if (do_it) {
285 assert(CompileThread_lock->owner() == ct, "must be holding lock");
286 } else {
287 // Skip check if it's the last thread and let caller check again.
288 return true;
289 }
290 }
297 if (do_it) {
298 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
299 compiler->set_num_compiler_threads(compiler_count - 1);
300 #if INCLUDE_JVMCI
301 if (compiler->is_jvmci() && !UseJVMCINativeLibrary) {
302 // Old j.l.Thread object can die when no longer referenced elsewhere.
303 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
304 _compiler2_objects[compiler_count - 1] = nullptr;
305 }
306 #endif
307 }
308 return true;
309 }
310 return false;
311 }
312
313 /**
314 * Add a CompileTask to a CompileQueue.
315 */
316 void CompileQueue::add(CompileTask* task) {
317 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
318
319 task->set_next(nullptr);
320 task->set_prev(nullptr);
321
322 if (_last == nullptr) {
323 // The compile queue is empty.
324 assert(_first == nullptr, "queue is empty");
325 _first = task;
326 _last = task;
327 } else {
328 // Append the task to the queue.
329 assert(_last->next() == nullptr, "not last");
330 _last->set_next(task);
331 task->set_prev(_last);
332 _last = task;
333 }
334 ++_size;
335 ++_total_added;
336 if (_size > _peak_size) {
337 _peak_size = _size;
338 }
339
340 // Mark the method as being in the compile queue.
341 task->method()->set_queued_for_compilation();
342
343 if (CIPrintCompileQueue) {
344 print_tty();
345 }
346
347 if (LogCompilation && xtty != nullptr) {
348 task->log_task_queued();
349 }
350
351 // Notify CompilerThreads that a task is available.
352 MethodCompileQueue_lock->notify_all();
353 }
354
355 /**
356 * Empties compilation queue by putting all compilation tasks onto
357 * a freelist. Furthermore, the method wakes up all threads that are
358 * waiting on a compilation task to finish. This can happen if background
359 * compilation is disabled.
360 */
361 void CompileQueue::free_all() {
362 MutexLocker mu(MethodCompileQueue_lock);
363 CompileTask* next = _first;
364
365 // Iterate over all tasks in the compile queue
366 while (next != nullptr) {
367 CompileTask* current = next;
368 next = current->next();
369 {
370 // Wake up thread that blocks on the compile task.
371 MutexLocker ct_lock(current->lock());
372 current->lock()->notify();
373 }
374 // Put the task back on the freelist.
375 CompileTask::free(current);
376 }
377 _first = nullptr;
378 _last = nullptr;
379
380 // Wake up all threads that block on the queue.
381 MethodCompileQueue_lock->notify_all();
382 }
383
384 /**
385 * Get the next CompileTask from a CompileQueue
386 */
387 CompileTask* CompileQueue::get(CompilerThread* thread) {
388 // save methods from RedefineClasses across safepoint
389 // across MethodCompileQueue_lock below.
390 methodHandle save_method;
391 methodHandle save_hot_method;
392
393 MonitorLocker locker(MethodCompileQueue_lock);
394 // If _first is null we have no more compile jobs. There are two reasons for
395 // having no compile jobs: First, we compiled everything we wanted. Second,
396 // we ran out of code cache so compilation has been disabled. In the latter
397 // case we perform code cache sweeps to free memory such that we can re-enable
398 // compilation.
399 while (_first == nullptr) {
400 // Exit loop if compilation is disabled forever
401 if (CompileBroker::is_compilation_disabled_forever()) {
402 return nullptr;
403 }
404
405 AbstractCompiler* compiler = thread->compiler();
406 guarantee(compiler != nullptr, "Compiler object must exist");
407 compiler->on_empty_queue(this, thread);
408 if (_first != nullptr) {
409 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
410 // so check again whether any tasks were added to the queue.
411 break;
412 }
413
414 // If there are no compilation tasks and we can compile new jobs
415 // (i.e., there is enough free space in the code cache) there is
416 // no need to invoke the GC.
417 // We need a timed wait here, since compiler threads can exit if compilation
418 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
419 // is not critical and we do not want idle compiler threads to wake up too often.
420 locker.wait(5*1000);
421
422 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
423 // Still nothing to compile. Give caller a chance to stop this thread.
424 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
425 }
426 }
427
428 if (CompileBroker::is_compilation_disabled_forever()) {
429 return nullptr;
430 }
431
432 CompileTask* task;
433 {
434 NoSafepointVerifier nsv;
435 task = CompilationPolicy::select_task(this);
436 if (task != nullptr) {
437 task = task->select_for_compilation();
438 }
439 }
440
441 if (task != nullptr) {
442 // Save method pointers across unlock safepoint. The task is removed from
443 // the compilation queue, which is walked during RedefineClasses.
444 Thread* thread = Thread::current();
445 save_method = methodHandle(thread, task->method());
446 save_hot_method = methodHandle(thread, task->hot_method());
447
448 remove(task);
449 }
450 purge_stale_tasks(); // may temporarily release MCQ lock
451 return task;
452 }
453
454 // Clean & deallocate stale compile tasks.
455 // Temporarily releases MethodCompileQueue lock.
456 void CompileQueue::purge_stale_tasks() {
457 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
458 if (_first_stale != nullptr) {
459 // Stale tasks are purged when MCQ lock is released,
460 // but _first_stale updates are protected by MCQ lock.
461 // Once task processing starts and MCQ lock is released,
462 // other compiler threads can reuse _first_stale.
463 CompileTask* head = _first_stale;
464 _first_stale = nullptr;
465 {
466 MutexUnlocker ul(MethodCompileQueue_lock);
467 for (CompileTask* task = head; task != nullptr; ) {
468 CompileTask* next_task = task->next();
469 CompileTaskWrapper ctw(task); // Frees the task
470 task->set_failure_reason("stale task");
471 task = next_task;
472 }
473 }
474 }
475 }
476
477 void CompileQueue::remove(CompileTask* task) {
478 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
479 if (task->prev() != nullptr) {
480 task->prev()->set_next(task->next());
481 } else {
482 // max is the first element
483 assert(task == _first, "Sanity");
484 _first = task->next();
485 }
486
487 if (task->next() != nullptr) {
488 task->next()->set_prev(task->prev());
489 } else {
490 // max is the last element
491 assert(task == _last, "Sanity");
492 _last = task->prev();
493 }
494 --_size;
495 ++_total_removed;
496 }
497
498 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
499 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
500 remove(task);
501
502 // Enqueue the task for reclamation (should be done outside MCQ lock)
503 task->set_next(_first_stale);
504 task->set_prev(nullptr);
505 _first_stale = task;
506 }
507
508 // methods in the compile queue need to be marked as used on the stack
509 // so that they don't get reclaimed by Redefine Classes
510 void CompileQueue::mark_on_stack() {
511 CompileTask* task = _first;
512 while (task != nullptr) {
513 task->mark_on_stack();
514 task = task->next();
515 }
516 }
517
518
519 CompileQueue* CompileBroker::compile_queue(int comp_level) {
520 if (is_c2_compile(comp_level)) return _c2_compile_queue;
521 if (is_c1_compile(comp_level)) return _c1_compile_queue;
522 return nullptr;
523 }
524
525 CompileQueue* CompileBroker::c1_compile_queue() {
526 return _c1_compile_queue;
527 }
528
529 CompileQueue* CompileBroker::c2_compile_queue() {
530 return _c2_compile_queue;
531 }
532
533 void CompileBroker::print_compile_queues(outputStream* st) {
534 st->print_cr("Current compiles: ");
535
536 char buf[2000];
537 int buflen = sizeof(buf);
538 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
539
540 st->cr();
541 if (_c1_compile_queue != nullptr) {
542 _c1_compile_queue->print(st);
543 }
544 if (_c2_compile_queue != nullptr) {
545 _c2_compile_queue->print(st);
546 }
547 }
548
549 void CompileQueue::print(outputStream* st) {
550 assert_locked_or_safepoint(MethodCompileQueue_lock);
551 st->print_cr("%s:", name());
552 CompileTask* task = _first;
553 if (task == nullptr) {
554 st->print_cr("Empty");
555 } else {
556 while (task != nullptr) {
557 task->print(st, nullptr, true, true);
558 task = task->next();
559 }
560 }
561 st->cr();
562 }
563
564 void CompileQueue::print_tty() {
565 stringStream ss;
566 // Dump the compile queue into a buffer before locking the tty
567 print(&ss);
568 {
569 ttyLocker ttyl;
570 tty->print("%s", ss.freeze());
597 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
598 }
599 first_registration = false;
600 #endif // COMPILER2
601 }
602 }
603 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
604
605 // ------------------------------------------------------------------
606 // CompileBroker::compilation_init
607 //
608 // Initialize the Compilation object
609 void CompileBroker::compilation_init(JavaThread* THREAD) {
610 // No need to initialize compilation system if we do not use it.
611 if (!UseCompiler) {
612 return;
613 }
614 // Set the interface to the current compiler(s).
615 _c1_count = CompilationPolicy::c1_count();
616 _c2_count = CompilationPolicy::c2_count();
617
618 #if INCLUDE_JVMCI
619 if (EnableJVMCI) {
620 // This is creating a JVMCICompiler singleton.
621 JVMCICompiler* jvmci = new JVMCICompiler();
622
623 if (UseJVMCICompiler) {
624 _compilers[1] = jvmci;
625 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
626 if (BootstrapJVMCI) {
627 // JVMCI will bootstrap so give it more threads
628 _c2_count = MIN2(32, os::active_processor_count());
629 }
630 } else {
631 _c2_count = JVMCIThreads;
632 }
633 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
634 } else {
635 #ifdef COMPILER1
636 _c1_count = JVMCIHostThreads;
637 #endif // COMPILER1
638 }
639 }
640 }
641 #endif // INCLUDE_JVMCI
642
643 #ifdef COMPILER1
644 if (_c1_count > 0) {
645 _compilers[0] = new Compiler();
646 }
647 #endif // COMPILER1
648
649 #ifdef COMPILER2
650 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
651 if (_c2_count > 0) {
652 _compilers[1] = new C2Compiler();
653 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
654 // idToPhase mapping for c2 is in opto/phasetype.hpp
655 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
656 }
657 }
658 #endif // COMPILER2
753 _perf_last_compile_size =
754 PerfDataManager::create_variable(SUN_CI, "lastSize",
755 PerfData::U_Bytes,
756 (jlong)CompileBroker::no_compile,
757 CHECK);
758
759
760 _perf_last_failed_type =
761 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
762 PerfData::U_None,
763 (jlong)CompileBroker::no_compile,
764 CHECK);
765
766 _perf_last_invalidated_type =
767 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
768 PerfData::U_None,
769 (jlong)CompileBroker::no_compile,
770 CHECK);
771 }
772
773 _initialized = true;
774 }
775
776 #if defined(ASSERT) && COMPILER2_OR_JVMCI
777 // Stress testing. Dedicated threads revert optimizations based on escape analysis concurrently to
778 // the running java application. Configured with vm options DeoptimizeObjectsALot*.
779 class DeoptimizeObjectsALotThread : public JavaThread {
780
781 static void deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS);
782 void deoptimize_objects_alot_loop_single();
783 void deoptimize_objects_alot_loop_all();
784
785 public:
786 DeoptimizeObjectsALotThread() : JavaThread(&deopt_objs_alot_thread_entry) { }
787
788 bool is_hidden_from_external_view() const { return true; }
789 };
790
791 // Entry for DeoptimizeObjectsALotThread. The threads are started in
792 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
793 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
794 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
795 bool enter_single_loop;
847 if (java_lang_Thread::thread(thread_oop()) != nullptr) {
848 assert(type == compiler_t, "should only happen with reused compiler threads");
849 // The compiler thread hasn't actually exited yet so don't try to reuse it
850 return nullptr;
851 }
852
853 JavaThread* new_thread = nullptr;
854 switch (type) {
855 case compiler_t:
856 assert(comp != nullptr, "Compiler instance missing.");
857 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
858 CompilerCounters* counters = new CompilerCounters();
859 new_thread = new CompilerThread(queue, counters);
860 }
861 break;
862 #if defined(ASSERT) && COMPILER2_OR_JVMCI
863 case deoptimizer_t:
864 new_thread = new DeoptimizeObjectsALotThread();
865 break;
866 #endif // ASSERT
867 default:
868 ShouldNotReachHere();
869 }
870
871 // At this point the new CompilerThread data-races with this startup
872 // thread (which is the main thread and NOT the VM thread).
873 // This means Java bytecodes being executed at startup can
874 // queue compile jobs which will run at whatever default priority the
875 // newly created CompilerThread runs at.
876
877
878 // At this point it may be possible that no osthread was created for the
879 // JavaThread due to lack of resources. We will handle that failure below.
880 // Also check new_thread so that static analysis is happy.
881 if (new_thread != nullptr && new_thread->osthread() != nullptr) {
882
883 if (type == compiler_t) {
884 CompilerThread::cast(new_thread)->set_compiler(comp);
885 }
886
926 }
927
928 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
929 char name_buffer[256];
930 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
931 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
932 return JNIHandles::make_global(thread_oop);
933 }
934
935 static void print_compiler_threads(stringStream& msg) {
936 if (TraceCompilerThreads) {
937 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
938 }
939 LogTarget(Debug, jit, thread) lt;
940 if (lt.is_enabled()) {
941 LogStream ls(lt);
942 ls.print_cr("%s", msg.as_string());
943 }
944 }
945
946 void CompileBroker::init_compiler_threads() {
947 // Ensure any exceptions lead to vm_exit_during_initialization.
948 EXCEPTION_MARK;
949 #if !defined(ZERO)
950 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
951 #endif // !ZERO
952 // Initialize the compilation queue
953 if (_c2_count > 0) {
954 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
955 _c2_compile_queue = new CompileQueue(name);
956 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
957 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
958 }
959 if (_c1_count > 0) {
960 _c1_compile_queue = new CompileQueue("C1 compile queue");
961 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
962 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
963 }
964
965 for (int i = 0; i < _c2_count; i++) {
966 // Create a name for our thread.
967 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
968 _compiler2_objects[i] = thread_handle;
969 _compiler2_logs[i] = nullptr;
970
971 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
972 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
973 assert(ct != nullptr, "should have been handled for initial thread");
974 _compilers[1]->set_num_compiler_threads(i + 1);
975 if (trace_compiler_threads()) {
976 ResourceMark rm;
977 ThreadsListHandle tlh; // name() depends on the TLH.
978 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
979 stringStream msg;
980 msg.print("Added initial compiler thread %s", ct->name());
981 print_compiler_threads(msg);
982 }
983 }
984 }
985
986 for (int i = 0; i < _c1_count; i++) {
987 // Create a name for our thread.
988 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
989 _compiler1_objects[i] = thread_handle;
990 _compiler1_logs[i] = nullptr;
991
992 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
993 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
994 assert(ct != nullptr, "should have been handled for initial thread");
995 _compilers[0]->set_num_compiler_threads(i + 1);
996 if (trace_compiler_threads()) {
997 ResourceMark rm;
998 ThreadsListHandle tlh; // name() depends on the TLH.
999 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1000 stringStream msg;
1001 msg.print("Added initial compiler thread %s", ct->name());
1002 print_compiler_threads(msg);
1003 }
1004 }
1005 }
1006
1007 if (UsePerfData) {
1008 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
1009 }
1010
1011 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1012 if (DeoptimizeObjectsALot) {
1013 // Initialize and start the object deoptimizer threads
1014 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1015 for (int count = 0; count < total_count; count++) {
1016 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1017 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1018 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1019 }
1020 }
1021 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1022 }
1023
1024 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1025
1026 julong free_memory = os::free_memory();
1027 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
1028 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
1029 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
1030
1031 // Only do attempt to start additional threads if the lock is free.
1032 if (!CompileThread_lock->try_lock()) return;
1033
1034 if (_c2_compile_queue != nullptr) {
1035 int old_c2_count = _compilers[1]->num_compiler_threads();
1036 int new_c2_count = MIN4(_c2_count,
1037 _c2_compile_queue->size() / 2,
1038 (int)(free_memory / (200*M)),
1039 (int)(available_cc_np / (128*K)));
1040
1041 for (int i = old_c2_count; i < new_c2_count; i++) {
1042 #if INCLUDE_JVMCI
1043 if (UseJVMCICompiler && !UseJVMCINativeLibrary && _compiler2_objects[i] == nullptr) {
1110 stringStream msg;
1111 msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1112 ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1113 print_compiler_threads(msg);
1114 }
1115 }
1116 }
1117
1118 CompileThread_lock->unlock();
1119 }
1120
1121
1122 /**
1123 * Set the methods on the stack as on_stack so that redefine classes doesn't
1124 * reclaim them. This method is executed at a safepoint.
1125 */
1126 void CompileBroker::mark_on_stack() {
1127 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1128 // Since we are at a safepoint, we do not need a lock to access
1129 // the compile queues.
1130 if (_c2_compile_queue != nullptr) {
1131 _c2_compile_queue->mark_on_stack();
1132 }
1133 if (_c1_compile_queue != nullptr) {
1134 _c1_compile_queue->mark_on_stack();
1135 }
1136 }
1137
1138 // ------------------------------------------------------------------
1139 // CompileBroker::compile_method
1140 //
1141 // Request compilation of a method.
1142 void CompileBroker::compile_method_base(const methodHandle& method,
1143 int osr_bci,
1144 int comp_level,
1145 const methodHandle& hot_method,
1146 int hot_count,
1147 CompileTask::CompileReason compile_reason,
1148 bool blocking,
1149 Thread* thread) {
1150 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1151 assert(method->method_holder()->is_instance_klass(),
1152 "sanity check");
1153 assert(!method->method_holder()->is_not_initialized(),
1154 "method holder must be initialized");
1155 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1156
1157 if (CIPrintRequests) {
1158 tty->print("request: ");
1159 method->print_short_name(tty);
1160 if (osr_bci != InvocationEntryBci) {
1161 tty->print(" osr_bci: %d", osr_bci);
1162 }
1163 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1164 if (!hot_method.is_null()) {
1165 tty->print(" hot: ");
1166 if (hot_method() != method()) {
1167 hot_method->print_short_name(tty);
1168 } else {
1169 tty->print("yes");
1170 }
1171 }
1172 tty->cr();
1173 }
1174
1175 // A request has been made for compilation. Before we do any
1176 // real work, check to see if the method has been compiled
1177 // in the meantime with a definitive result.
1178 if (compilation_is_complete(method, osr_bci, comp_level)) {
1179 return;
1180 }
1181
1182 #ifndef PRODUCT
1183 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1184 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1185 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1186 return;
1187 }
1188 }
1189 #endif
1190
1191 // If this method is already in the compile queue, then
1192 // we do not block the current thread.
1193 if (compilation_is_in_queue(method)) {
1194 // We may want to decay our counter a bit here to prevent
1195 // multiple denied requests for compilation. This is an
1196 // open compilation policy issue. Note: The other possibility,
1197 // in the case that this is a blocking compile request, is to have
1198 // all subsequent blocking requesters wait for completion of
1199 // ongoing compiles. Note that in this case we'll need a protocol
1200 // for freeing the associated compile tasks. [Or we could have
1201 // a single static monitor on which all these waiters sleep.]
1202 return;
1203 }
1204
1205 // Tiered policy requires MethodCounters to exist before adding a method to
1206 // the queue. Create if we don't have them yet.
1207 method->get_method_counters(thread);
1208
1209 // Outputs from the following MutexLocker block:
1210 CompileTask* task = nullptr;
1211 CompileQueue* queue = compile_queue(comp_level);
1212
1213 // Acquire our lock.
1214 {
1215 MutexLocker locker(thread, MethodCompileQueue_lock);
1216
1217 // Make sure the method has not slipped into the queues since
1218 // last we checked; note that those checks were "fast bail-outs".
1219 // Here we need to be more careful, see 14012000 below.
1220 if (compilation_is_in_queue(method)) {
1221 return;
1222 }
1223
1224 // We need to check again to see if the compilation has
1225 // completed. A previous compilation may have registered
1226 // some result.
1227 if (compilation_is_complete(method, osr_bci, comp_level)) {
1228 return;
1229 }
1230
1231 // We now know that this compilation is not pending, complete,
1232 // or prohibited. Assign a compile_id to this compilation
1233 // and check to see if it is in our [Start..Stop) range.
1234 int compile_id = assign_compile_id(method, osr_bci);
1235 if (compile_id == 0) {
1236 // The compilation falls outside the allowed range.
1237 return;
1238 }
1239
1240 #if INCLUDE_JVMCI
1241 if (UseJVMCICompiler && blocking) {
1242 // Don't allow blocking compiles for requests triggered by JVMCI.
1243 if (thread->is_Compiler_thread()) {
1244 blocking = false;
1245 }
1246
1247 // In libjvmci, JVMCI initialization should not deadlock with other threads
1297 // <RESULT, QUEUE> :
1298 // <0, 1> : in compile queue, but not yet compiled
1299 // <1, 1> : compiled but queue bit not cleared
1300 // <1, 0> : compiled and queue bit cleared
1301 // Because we first check the queue bits then check the result bits,
1302 // we are assured that we cannot introduce a duplicate task.
1303 // Note that if we did the tests in the reverse order (i.e. check
1304 // result then check queued bit), we could get the result bit before
1305 // the compilation completed, and the queue bit after the compilation
1306 // completed, and end up introducing a "duplicate" (redundant) task.
1307 // In that case, the compiler thread should first check if a method
1308 // has already been compiled before trying to compile it.
1309 // NOTE: in the event that there are multiple compiler threads and
1310 // there is de-optimization/recompilation, things will get hairy,
1311 // and in that case it's best to protect both the testing (here) of
1312 // these bits, and their updating (here and elsewhere) under a
1313 // common lock.
1314 task = create_compile_task(queue,
1315 compile_id, method,
1316 osr_bci, comp_level,
1317 hot_method, hot_count, compile_reason,
1318 blocking);
1319 }
1320
1321 if (blocking) {
1322 wait_for_completion(task);
1323 }
1324 }
1325
1326 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1327 int comp_level,
1328 const methodHandle& hot_method, int hot_count,
1329 CompileTask::CompileReason compile_reason,
1330 TRAPS) {
1331 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1332 if (!_initialized || comp_level == CompLevel_none) {
1333 return nullptr;
1334 }
1335
1336 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1337 assert(comp != nullptr, "Ensure we have a compiler");
1338
1339 #if INCLUDE_JVMCI
1340 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1341 // JVMCI compilation is not yet initializable.
1342 return nullptr;
1343 }
1344 #endif
1345
1346 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1347 // CompileBroker::compile_method can trap and can have pending async exception.
1348 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1349 DirectivesStack::release(directive);
1350 return nm;
1351 }
1352
1353 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1354 int comp_level,
1355 const methodHandle& hot_method, int hot_count,
1356 CompileTask::CompileReason compile_reason,
1357 DirectiveSet* directive,
1358 TRAPS) {
1359
1360 // make sure arguments make sense
1361 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1362 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1363 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1364 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1365 // return quickly if possible
1366
1367 // lock, make sure that the compilation
1368 // isn't prohibited in a straightforward way.
1369 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1370 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1371 return nullptr;
1372 }
1373
1374 if (osr_bci == InvocationEntryBci) {
1375 // standard compilation
1376 nmethod* method_code = method->code();
1377 if (method_code != nullptr) {
1378 if (compilation_is_complete(method, osr_bci, comp_level)) {
1379 return method_code;
1380 }
1381 }
1382 if (method->is_not_compilable(comp_level)) {
1383 return nullptr;
1384 }
1385 } else {
1386 // osr compilation
1387 // We accept a higher level osr method
1388 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1389 if (nm != nullptr) return nm;
1390 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1391 }
1392
1393 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1394 // some prerequisites that are compiler specific
1395 if (comp->is_c2() || comp->is_jvmci()) {
1396 InternalOOMEMark iom(THREAD);
1397 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1398 // Resolve all classes seen in the signature of the method
1399 // we are compiling.
1400 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1401 }
1402
1403 // If the method is native, do the lookup in the thread requesting
1404 // the compilation. Native lookups can load code, which is not
1405 // permitted during compilation.
1406 //
1407 // Note: A native method implies non-osr compilation which is
1408 // checked with an assertion at the entry of this method.
1409 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1410 address adr = NativeLookup::lookup(method, THREAD);
1411 if (HAS_PENDING_EXCEPTION) {
1412 // In case of an exception looking up the method, we just forget
1413 // about it. The interpreter will kick-in and throw the exception.
1414 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1415 CLEAR_PENDING_EXCEPTION;
1454 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1455 return nullptr;
1456 }
1457 #endif // X86 && !ZERO
1458
1459 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1460 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1461 //
1462 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1463 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1464 AdapterHandlerLibrary::create_native_wrapper(method);
1465 } else {
1466 return nullptr;
1467 }
1468 } else {
1469 // If the compiler is shut off due to code cache getting full
1470 // fail out now so blocking compiles dont hang the java thread
1471 if (!should_compile_new_jobs()) {
1472 return nullptr;
1473 }
1474 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1475 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1476 }
1477
1478 // return requested nmethod
1479 // We accept a higher level osr method
1480 if (osr_bci == InvocationEntryBci) {
1481 return method->code();
1482 }
1483 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1484 }
1485
1486
1487 // ------------------------------------------------------------------
1488 // CompileBroker::compilation_is_complete
1489 //
1490 // See if compilation of this method is already complete.
1491 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1492 int osr_bci,
1493 int comp_level) {
1494 bool is_osr = (osr_bci != standard_entry_bci);
1495 if (is_osr) {
1496 if (method->is_not_osr_compilable(comp_level)) {
1497 return true;
1498 } else {
1499 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1500 return (result != nullptr);
1501 }
1502 } else {
1503 if (method->is_not_compilable(comp_level)) {
1504 return true;
1505 } else {
1506 nmethod* result = method->code();
1507 if (result == nullptr) return false;
1508 return comp_level == result->comp_level();
1509 }
1510 }
1511 }
1512
1513
1514 /**
1515 * See if this compilation is already requested.
1516 *
1517 * Implementation note: there is only a single "is in queue" bit
1518 * for each method. This means that the check below is overly
1519 * conservative in the sense that an osr compilation in the queue
1520 * will block a normal compilation from entering the queue (and vice
1521 * versa). This can be remedied by a full queue search to disambiguate
1522 * cases. If it is deemed profitable, this may be done.
1523 */
1524 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1525 return method->queued_for_compilation();
1526 }
1527
1528 // ------------------------------------------------------------------
1588 if (CIStart <= id && id < CIStop) {
1589 return id;
1590 }
1591 }
1592
1593 // Method was not in the appropriate compilation range.
1594 method->set_not_compilable_quietly("Not in requested compile id range");
1595 return 0;
1596 #else
1597 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1598 // only _compilation_id is incremented.
1599 return Atomic::add(&_compilation_id, 1);
1600 #endif
1601 }
1602
1603 // ------------------------------------------------------------------
1604 // CompileBroker::assign_compile_id_unlocked
1605 //
1606 // Public wrapper for assign_compile_id that acquires the needed locks
1607 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1608 MutexLocker locker(thread, MethodCompileQueue_lock);
1609 return assign_compile_id(method, osr_bci);
1610 }
1611
1612 // ------------------------------------------------------------------
1613 // CompileBroker::create_compile_task
1614 //
1615 // Create a CompileTask object representing the current request for
1616 // compilation. Add this task to the queue.
1617 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1618 int compile_id,
1619 const methodHandle& method,
1620 int osr_bci,
1621 int comp_level,
1622 const methodHandle& hot_method,
1623 int hot_count,
1624 CompileTask::CompileReason compile_reason,
1625 bool blocking) {
1626 CompileTask* new_task = CompileTask::allocate();
1627 new_task->initialize(compile_id, method, osr_bci, comp_level,
1628 hot_method, hot_count, compile_reason,
1629 blocking);
1630 queue->add(new_task);
1631 return new_task;
1632 }
1633
1634 #if INCLUDE_JVMCI
1635 // The number of milliseconds to wait before checking if
1636 // JVMCI compilation has made progress.
1637 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1638
1639 // The number of JVMCI compilation progress checks that must fail
1640 // before unblocking a thread waiting for a blocking compilation.
1641 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1642
1643 /**
1644 * Waits for a JVMCI compiler to complete a given task. This thread
1645 * waits until either the task completes or it sees no JVMCI compilation
1646 * progress for N consecutive milliseconds where N is
1647 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1648 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1649 *
1650 * @return true if this thread needs to free/recycle the task
1751 */
1752 bool CompileBroker::init_compiler_runtime() {
1753 CompilerThread* thread = CompilerThread::current();
1754 AbstractCompiler* comp = thread->compiler();
1755 // Final sanity check - the compiler object must exist
1756 guarantee(comp != nullptr, "Compiler object must exist");
1757
1758 {
1759 // Must switch to native to allocate ci_env
1760 ThreadToNativeFromVM ttn(thread);
1761 ciEnv ci_env((CompileTask*)nullptr);
1762 // Cache Jvmti state
1763 ci_env.cache_jvmti_state();
1764 // Cache DTrace flags
1765 ci_env.cache_dtrace_flags();
1766
1767 // Switch back to VM state to do compiler initialization
1768 ThreadInVMfromNative tv(thread);
1769
1770 // Perform per-thread and global initializations
1771 comp->initialize();
1772 }
1773
1774 if (comp->is_failed()) {
1775 disable_compilation_forever();
1776 // If compiler initialization failed, no compiler thread that is specific to a
1777 // particular compiler runtime will ever start to compile methods.
1778 shutdown_compiler_runtime(comp, thread);
1779 return false;
1780 }
1781
1782 // C1 specific check
1783 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
1784 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1785 return false;
1786 }
1787
1788 return true;
1789 }
1790
1791 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
1792 BufferBlob* blob = thread->get_buffer_blob();
1793 if (blob != nullptr) {
1794 blob->purge();
1795 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1796 CodeCache::free(blob);
1797 }
1798 }
1799
1800 /**
1801 * If C1 and/or C2 initialization failed, we shut down all compilation.
1802 * We do this to keep things simple. This can be changed if it ever turns
1803 * out to be a problem.
1804 */
1805 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1806 free_buffer_blob_if_allocated(thread);
1807
1808 if (comp->should_perform_shutdown()) {
1809 // There are two reasons for shutting down the compiler
1810 // 1) compiler runtime initialization failed
1811 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1812 warning("%s initialization failed. Shutting down all compilers", comp->name());
1813
1814 // Only one thread per compiler runtime object enters here
1815 // Set state to shut down
1816 comp->set_shut_down();
1817
1818 // Delete all queued compilation tasks to make compiler threads exit faster.
1819 if (_c1_compile_queue != nullptr) {
1820 _c1_compile_queue->free_all();
1821 }
1822
1823 if (_c2_compile_queue != nullptr) {
1824 _c2_compile_queue->free_all();
1825 }
1826
1827 // Set flags so that we continue execution with using interpreter only.
1828 UseCompiler = false;
1829 UseInterpreter = true;
1830
1831 // We could delete compiler runtimes also. However, there are references to
1832 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1833 // fail. This can be done later if necessary.
1834 }
1835 }
1836
1837 /**
1838 * Helper function to create new or reuse old CompileLog.
1839 */
1840 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1841 if (!LogCompilation) return nullptr;
1842
1843 AbstractCompiler *compiler = ct->compiler();
1844 bool c1 = compiler->is_c1();
1845 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1846 assert(compiler_objects != nullptr, "must be initialized at this point");
1847 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1848 assert(logs != nullptr, "must be initialized at this point");
1849 int count = c1 ? _c1_count : _c2_count;
1850
1851 // Find Compiler number by its threadObj.
1852 oop compiler_obj = ct->threadObj();
1853 int compiler_number = 0;
1854 bool found = false;
1855 for (; compiler_number < count; compiler_number++) {
1856 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
1857 found = true;
1858 break;
1859 }
1860 }
1861 assert(found, "Compiler must exist at this point");
1862
1863 // Determine pointer for this thread's log.
1864 CompileLog** log_ptr = &logs[compiler_number];
1865
1866 // Return old one if it exists.
1867 CompileLog* log = *log_ptr;
1868 if (log != nullptr) {
1869 ct->init_log(log);
1870 return log;
1908 log->stamp();
1909 log->end_elem();
1910 }
1911
1912 // If compiler thread/runtime initialization fails, exit the compiler thread
1913 if (!init_compiler_runtime()) {
1914 return;
1915 }
1916
1917 thread->start_idle_timer();
1918
1919 // Poll for new compilation tasks as long as the JVM runs. Compilation
1920 // should only be disabled if something went wrong while initializing the
1921 // compiler runtimes. This, in turn, should not happen. The only known case
1922 // when compiler runtime initialization fails is if there is not enough free
1923 // space in the code cache to generate the necessary stubs, etc.
1924 while (!is_compilation_disabled_forever()) {
1925 // We need this HandleMark to avoid leaking VM handles.
1926 HandleMark hm(thread);
1927
1928 CompileTask* task = queue->get(thread);
1929 if (task == nullptr) {
1930 if (UseDynamicNumberOfCompilerThreads) {
1931 // Access compiler_count under lock to enforce consistency.
1932 MutexLocker only_one(CompileThread_lock);
1933 if (can_remove(thread, true)) {
1934 if (trace_compiler_threads()) {
1935 ResourceMark rm;
1936 stringStream msg;
1937 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1938 thread->name(), thread->idle_time_millis());
1939 print_compiler_threads(msg);
1940 }
1941
1942 // Notify compiler that the compiler thread is about to stop
1943 thread->compiler()->stopping_compiler_thread(thread);
1944
1945 free_buffer_blob_if_allocated(thread);
1946 return; // Stop this thread.
1947 }
1948 }
1949 } else {
1950 // Assign the task to the current thread. Mark this compilation
1951 // thread as active for the profiler.
1952 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1953 // occurs after fetching the compile task off the queue.
1954 CompileTaskWrapper ctw(task);
1955 methodHandle method(thread, task->method());
1956
1957 // Never compile a method if breakpoints are present in it
1958 if (method()->number_of_breakpoints() == 0) {
1959 // Compile the method.
1960 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1961 invoke_compiler_on_method(task);
1962 thread->start_idle_timer();
1963 } else {
1964 // After compilation is disabled, remove remaining methods from queue
1965 method->clear_queued_for_compilation();
1966 task->set_failure_reason("compilation is disabled");
1967 }
1968 } else {
1969 task->set_failure_reason("breakpoints are present");
1970 }
1971
1972 if (UseDynamicNumberOfCompilerThreads) {
1973 possibly_add_compiler_threads(thread);
1974 assert(!thread->has_pending_exception(), "should have been handled");
1975 }
1976 }
1977 }
1978
1979 // Shut down compiler runtime
1980 shutdown_compiler_runtime(thread->compiler(), thread);
1981 }
1982
1983 // ------------------------------------------------------------------
1984 // CompileBroker::init_compiler_thread_log
1985 //
2154 if (directive->PrintCompilationOption) {
2155 ResourceMark rm;
2156 task->print_tty();
2157 }
2158
2159 CompilerThread* thread = CompilerThread::current();
2160 ResourceMark rm(thread);
2161
2162 if (CompilationLog::log() != nullptr) {
2163 CompilationLog::log()->log_compile(thread, task);
2164 }
2165
2166 // Common flags.
2167 int compile_id = task->compile_id();
2168 int osr_bci = task->osr_bci();
2169 bool is_osr = (osr_bci != standard_entry_bci);
2170 bool should_log = (thread->log() != nullptr);
2171 bool should_break = false;
2172 const int task_level = task->comp_level();
2173 AbstractCompiler* comp = task->compiler();
2174 {
2175 // create the handle inside it's own block so it can't
2176 // accidentally be referenced once the thread transitions to
2177 // native. The NoHandleMark before the transition should catch
2178 // any cases where this occurs in the future.
2179 methodHandle method(thread, task->method());
2180
2181 assert(!method->is_native(), "no longer compile natives");
2182
2183 // Update compile information when using perfdata.
2184 if (UsePerfData) {
2185 update_compile_perf_data(thread, method, is_osr);
2186 }
2187
2188 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2189 }
2190
2191 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2192 if (should_log && !directive->LogOption) {
2193 should_log = false;
2194 }
2195
2196 // Allocate a new set of JNI handles.
2197 JNIHandleMark jhm(thread);
2198 Method* target_handle = task->method();
2199 int compilable = ciEnv::MethodCompilable;
2200 const char* failure_reason = nullptr;
2201 bool failure_reason_on_C_heap = false;
2202 const char* retry_message = nullptr;
2203
2204 #if INCLUDE_JVMCI
2205 if (UseJVMCICompiler && comp != nullptr && comp->is_jvmci()) {
2206 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2207
2208 TraceTime t1("compilation", &time);
2209 EventCompilation event;
2210 JVMCICompileState compile_state(task, jvmci);
2277 }
2278 assert(thread->env() == &ci_env, "set by ci_env");
2279 // The thread-env() field is cleared in ~CompileTaskWrapper.
2280
2281 // Cache Jvmti state
2282 bool method_is_old = ci_env.cache_jvmti_state();
2283
2284 // Skip redefined methods
2285 if (method_is_old) {
2286 ci_env.record_method_not_compilable("redefined method", true);
2287 }
2288
2289 // Cache DTrace flags
2290 ci_env.cache_dtrace_flags();
2291
2292 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2293
2294 TraceTime t1("compilation", &time);
2295 EventCompilation event;
2296
2297 if (comp == nullptr) {
2298 ci_env.record_method_not_compilable("no compiler");
2299 } else if (!ci_env.failing()) {
2300 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2301 whitebox_lock_compilation();
2302 }
2303 comp->compile_method(&ci_env, target, osr_bci, true, directive);
2304
2305 /* Repeat compilation without installing code for profiling purposes */
2306 int repeat_compilation_count = directive->RepeatCompilationOption;
2307 while (repeat_compilation_count > 0) {
2308 ResourceMark rm(thread);
2309 task->print_ul("NO CODE INSTALLED");
2310 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2311 repeat_compilation_count--;
2312 }
2313 }
2314
2315 DirectivesStack::release(directive);
2316
2317 if (!ci_env.failing() && !task->is_success()) {
2318 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2319 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2320 // The compiler elected, without comment, not to register a result.
2321 // Do not attempt further compilations of this method.
2322 ci_env.record_method_not_compilable("compile failed");
2323 }
2324
2325 // Copy this bit to the enclosing block:
2326 compilable = ci_env.compilable();
2327
2328 if (ci_env.failing()) {
2329 // Duplicate the failure reason string, so that it outlives ciEnv
2330 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2331 failure_reason_on_C_heap = true;
2332 retry_message = ci_env.retry_message();
2333 ci_env.report_failure(failure_reason);
2334 }
2335
2336 if (ci_env.failing()) {
2337 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2338 }
2339 if (event.should_commit()) {
2340 post_compilation_event(event, task);
2341 }
2342 }
2343
2344 if (failure_reason != nullptr) {
2345 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2346 if (CompilationLog::log() != nullptr) {
2347 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2348 }
2349 if (PrintCompilation) {
2350 FormatBufferResource msg = retry_message != nullptr ?
2351 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2352 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2353 task->print(tty, msg);
2354 }
2355 }
2356
2357 methodHandle method(thread, task->method());
2358
2359 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2360
2361 collect_statistics(thread, time, task);
2362
2363 if (PrintCompilation && PrintCompilation2) {
2364 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2365 tty->print("%4d ", compile_id); // print compilation number
2366 tty->print("%s ", (is_osr ? "%" : " "));
2367 if (task->is_success()) {
2368 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2369 }
2370 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2371 }
2372
2373 Log(compilation, codecache) log;
2374 if (log.is_debug()) {
2375 LogStream ls(log.debug());
2376 codecache_print(&ls, /* detailed= */ false);
2377 }
2378 if (PrintCodeCacheOnCompilation) {
2379 codecache_print(/* detailed= */ false);
2380 }
2381 // Disable compilation, if required.
2382 switch (compilable) {
2383 case ciEnv::MethodCompilable_never:
2384 if (is_osr)
2385 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2386 else
2387 method->set_not_compilable_quietly("MethodCompilable_never");
2388 break;
2389 case ciEnv::MethodCompilable_not_at_tier:
2390 if (is_osr)
2391 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2392 else
2393 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2394 break;
2395 }
2396
2397 // Note that the queued_for_compilation bits are cleared without
2398 // protection of a mutex. [They were set by the requester thread,
2399 // when adding the task to the compile queue -- at which time the
2400 // compile queue lock was held. Subsequently, we acquired the compile
2401 // queue lock to get this task off the compile queue; thus (to belabour
2402 // the point somewhat) our clearing of the bits must be occurring
2403 // only after the setting of the bits. See also 14012000 above.
2404 method->clear_queued_for_compilation();
2405 }
2406
2407 /**
2408 * The CodeCache is full. Print warning and disable compilation.
2409 * Schedule code cache cleaning so compilation can continue later.
2410 * This function needs to be called only from CodeCache::allocate(),
2411 * since we currently handle a full code cache uniformly.
2412 */
2413 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2414 UseInterpreter = true;
2415 if (UseCompiler || AlwaysCompileLoopMethods ) {
2416 if (xtty != nullptr) {
2417 stringStream s;
2418 // Dump code cache state into a buffer before locking the tty,
2419 // because log_state() will use locks causing lock conflicts.
2420 CodeCache::log_state(&s);
2421 // Lock to prevent tearing
2422 ttyLocker ttyl;
2423 xtty->begin_elem("code_cache_full");
2424 xtty->print("%s", s.freeze());
2497 // CompileBroker::collect_statistics
2498 //
2499 // Collect statistics about the compilation.
2500
2501 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2502 bool success = task->is_success();
2503 methodHandle method (thread, task->method());
2504 int compile_id = task->compile_id();
2505 bool is_osr = (task->osr_bci() != standard_entry_bci);
2506 const int comp_level = task->comp_level();
2507 CompilerCounters* counters = thread->counters();
2508
2509 MutexLocker locker(CompileStatistics_lock);
2510
2511 // _perf variables are production performance counters which are
2512 // updated regardless of the setting of the CITime and CITimeEach flags
2513 //
2514
2515 // account all time, including bailouts and failures in this counter;
2516 // C1 and C2 counters are counting both successful and unsuccessful compiles
2517 _t_total_compilation.add(time);
2518
2519 if (!success) {
2520 _total_bailout_count++;
2521 if (UsePerfData) {
2522 _perf_last_failed_method->set_value(counters->current_method());
2523 _perf_last_failed_type->set_value(counters->compile_type());
2524 _perf_total_bailout_count->inc();
2525 }
2526 _t_bailedout_compilation.add(time);
2527 } else if (!task->is_success()) {
2528 if (UsePerfData) {
2529 _perf_last_invalidated_method->set_value(counters->current_method());
2530 _perf_last_invalidated_type->set_value(counters->compile_type());
2531 _perf_total_invalidated_count->inc();
2532 }
2533 _total_invalidated_count++;
2534 _t_invalidated_compilation.add(time);
2535 } else {
2536 // Compilation succeeded
2537
2538 // update compilation ticks - used by the implementation of
2539 // java.lang.management.CompilationMXBean
2540 _perf_total_compilation->inc(time.ticks());
2541 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2542
2543 if (CITime) {
2544 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2545 if (is_osr) {
2546 _t_osr_compilation.add(time);
2547 _sum_osr_bytes_compiled += bytes_compiled;
2548 } else {
2549 _t_standard_compilation.add(time);
2550 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2551 }
2552
2553 // Collect statistic per compilation level
2554 if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2555 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2556 if (is_osr) {
2557 stats->_osr.update(time, bytes_compiled);
2558 } else {
2559 stats->_standard.update(time, bytes_compiled);
2560 }
2561 stats->_nmethods_size += task->nm_total_size();
2562 stats->_nmethods_code_size += task->nm_insts_size();
2563 } else {
2564 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2565 }
2566
2567 // Collect statistic per compiler
2568 AbstractCompiler* comp = compiler(comp_level);
2569 if (comp) {
2570 CompilerStatistics* stats = comp->stats();
2571 if (is_osr) {
2572 stats->_osr.update(time, bytes_compiled);
2573 } else {
2574 stats->_standard.update(time, bytes_compiled);
2575 }
2576 stats->_nmethods_size += task->nm_total_size();
2577 stats->_nmethods_code_size += task->nm_insts_size();
2578 } else { // if (!comp)
2579 assert(false, "Compiler object must exist");
2580 }
2581 }
2582
2583 if (UsePerfData) {
2584 // save the name of the last method compiled
2585 _perf_last_method->set_value(counters->current_method());
2586 _perf_last_compile_type->set_value(counters->compile_type());
2587 _perf_last_compile_size->set_value(method->code_size() +
2588 task->num_inlined_bytecodes());
2589 if (is_osr) {
2590 _perf_osr_compilation->inc(time.ticks());
2591 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2592 } else {
2593 _perf_standard_compilation->inc(time.ticks());
2594 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2595 }
2596 }
2597
2598 if (CITimeEach) {
2621 _total_standard_compile_count++;
2622 }
2623 }
2624 // set the current method for the thread to null
2625 if (UsePerfData) counters->set_current_method("");
2626 }
2627
2628 const char* CompileBroker::compiler_name(int comp_level) {
2629 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2630 if (comp == nullptr) {
2631 return "no compiler";
2632 } else {
2633 return (comp->name());
2634 }
2635 }
2636
2637 jlong CompileBroker::total_compilation_ticks() {
2638 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2639 }
2640
2641 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
2642 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}",
2643 name, stats->bytes_per_second(),
2644 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2645 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2646 stats->_nmethods_size, stats->_nmethods_code_size);
2647 }
2648
2649 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2650 if (per_compiler) {
2651 if (aggregate) {
2652 tty->cr();
2653 tty->print_cr("Individual compiler times (for compiled methods only)");
2654 tty->print_cr("------------------------------------------------");
2655 tty->cr();
2656 }
2657 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2658 AbstractCompiler* comp = _compilers[i];
2659 if (comp != nullptr) {
2660 print_times(comp->name(), comp->stats());
2661 }
2662 }
2663 if (aggregate) {
2664 tty->cr();
2665 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
2666 tty->print_cr("------------------------------------------------");
2667 tty->cr();
2668 }
2669 char tier_name[256];
2670 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
2671 CompilerStatistics* stats = &_stats_per_level[tier-1];
2672 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
2673 print_times(tier_name, stats);
2674 }
2675 }
2676
2677 if (!aggregate) {
2678 return;
2679 }
2680
2681 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2682 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2683 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2684
2685 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2686 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2687
2688 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
2689 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
2690 uint total_compile_count = CompileBroker::_total_compile_count;
2691 uint total_bailout_count = CompileBroker::_total_bailout_count;
2692 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
2693
2694 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
2696
2697 tty->cr();
2698 tty->print_cr("Accumulated compiler times");
2699 tty->print_cr("----------------------------------------------------------");
2700 //0000000000111111111122222222223333333333444444444455555555556666666666
2701 //0123456789012345678901234567890123456789012345678901234567890123456789
2702 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2703 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2704 standard_compilation.seconds(),
2705 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
2706 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2707 CompileBroker::_t_bailedout_compilation.seconds(),
2708 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
2709 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2710 osr_compilation.seconds(),
2711 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
2712 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2713 CompileBroker::_t_invalidated_compilation.seconds(),
2714 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
2715
2716 AbstractCompiler *comp = compiler(CompLevel_simple);
2717 if (comp != nullptr) {
2718 tty->cr();
2719 comp->print_timers();
2720 }
2721 comp = compiler(CompLevel_full_optimization);
2722 if (comp != nullptr) {
2723 tty->cr();
2724 comp->print_timers();
2725 }
2726 #if INCLUDE_JVMCI
2727 if (EnableJVMCI) {
2728 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
2729 if (jvmci_comp != nullptr && jvmci_comp != comp) {
2730 tty->cr();
2731 jvmci_comp->print_timers();
2732 }
2733 }
2734 #endif
2735
2736 tty->cr();
2737 tty->print_cr(" Total compiled methods : %8u methods", total_compile_count);
2738 tty->print_cr(" Standard compilation : %8u methods", standard_compile_count);
2739 tty->print_cr(" On stack replacement : %8u methods", osr_compile_count);
2740 uint tcb = osr_bytes_compiled + standard_bytes_compiled;
2741 tty->print_cr(" Total compiled bytecodes : %8u bytes", tcb);
2742 tty->print_cr(" Standard compilation : %8u bytes", standard_bytes_compiled);
2743 tty->print_cr(" On stack replacement : %8u bytes", osr_bytes_compiled);
2744 double tcs = total_compilation.seconds();
2745 uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
|
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "cds/cdsConfig.hpp"
27 #include "cds/classPreloader.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/symbolTable.hpp"
30 #include "classfile/vmClasses.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/codeCache.hpp"
33 #include "code/codeHeapState.hpp"
34 #include "code/dependencyContext.hpp"
35 #include "code/SCCache.hpp"
36 #include "compiler/compilationLog.hpp"
37 #include "compiler/compilationMemoryStatistic.hpp"
38 #include "compiler/compilationPolicy.hpp"
39 #include "compiler/compileBroker.hpp"
40 #include "compiler/compilerDefinitions.inline.hpp"
41 #include "compiler/compileLog.hpp"
42 #include "compiler/compilerEvent.hpp"
43 #include "compiler/compilerOracle.hpp"
44 #include "compiler/directivesParser.hpp"
45 #include "gc/shared/memAllocator.hpp"
46 #include "interpreter/linkResolver.hpp"
47 #include "jvm.h"
48 #include "jfr/jfrEvents.hpp"
49 #include "logging/log.hpp"
50 #include "logging/logStream.hpp"
51 #include "memory/allocation.inline.hpp"
52 #include "memory/resourceArea.hpp"
53 #include "memory/universe.hpp"
54 #include "oops/methodData.hpp"
55 #include "oops/method.inline.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "prims/jvmtiExport.hpp"
58 #include "prims/nativeLookup.hpp"
59 #include "prims/whitebox.hpp"
60 #include "runtime/atomic.hpp"
61 #include "runtime/escapeBarrier.hpp"
62 #include "runtime/globals_extension.hpp"
63 #include "runtime/handles.inline.hpp"
64 #include "runtime/init.hpp"
65 #include "runtime/interfaceSupport.inline.hpp"
66 #include "runtime/java.hpp"
67 #include "runtime/javaCalls.hpp"
68 #include "runtime/jniHandles.inline.hpp"
69 #include "runtime/os.hpp"
70 #include "runtime/perfData.hpp"
71 #include "runtime/safepointVerifiers.hpp"
72 #include "runtime/sharedRuntime.hpp"
73 #include "runtime/threads.hpp"
74 #include "runtime/threadSMR.inline.hpp"
75 #include "runtime/timerTrace.hpp"
76 #include "runtime/vframe.inline.hpp"
77 #include "services/management.hpp"
78 #include "utilities/debug.hpp"
79 #include "utilities/dtrace.hpp"
80 #include "utilities/events.hpp"
81 #include "utilities/formatBuffer.hpp"
82 #include "utilities/macros.hpp"
83 #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(); \
111 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
112 { \
113 Symbol* klass_name = (method)->klass_name(); \
114 Symbol* name = (method)->name(); \
115 Symbol* signature = (method)->signature(); \
116 HOTSPOT_METHOD_COMPILE_END( \
117 (char *) comp_name, strlen(comp_name), \
118 (char *) klass_name->bytes(), klass_name->utf8_length(), \
119 (char *) name->bytes(), name->utf8_length(), \
120 (char *) signature->bytes(), signature->utf8_length(), (success)); \
121 }
122
123 #else // ndef DTRACE_ENABLED
124
125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
126 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
127
128 #endif // ndef DTRACE_ENABLED
129
130 bool CompileBroker::_initialized = false;
131 bool CompileBroker::_replay_initialized = false;
132 volatile bool CompileBroker::_should_block = false;
133 volatile int CompileBroker::_print_compilation_warning = 0;
134 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
135
136 // The installed compiler(s)
137 AbstractCompiler* CompileBroker::_compilers[3];
138
139 // The maximum numbers of compiler threads to be determined during startup.
140 int CompileBroker::_c1_count = 0;
141 int CompileBroker::_c2_count = 0;
142 int CompileBroker::_c3_count = 0;
143 int CompileBroker::_sc_count = 0;
144
145 // An array of compiler names as Java String objects
146 jobject* CompileBroker::_compiler1_objects = nullptr;
147 jobject* CompileBroker::_compiler2_objects = nullptr;
148 jobject* CompileBroker::_compiler3_objects = nullptr;
149 jobject* CompileBroker::_sc_objects = nullptr;
150
151 CompileLog** CompileBroker::_compiler1_logs = nullptr;
152 CompileLog** CompileBroker::_compiler2_logs = nullptr;
153 CompileLog** CompileBroker::_compiler3_logs = nullptr;
154 CompileLog** CompileBroker::_sc_logs = nullptr;
155
156 // These counters are used to assign an unique ID to each compilation.
157 volatile jint CompileBroker::_compilation_id = 0;
158 volatile jint CompileBroker::_osr_compilation_id = 0;
159 volatile jint CompileBroker::_native_compilation_id = 0;
160
161 // Performance counters
162 PerfCounter* CompileBroker::_perf_total_compilation = nullptr;
163 PerfCounter* CompileBroker::_perf_osr_compilation = nullptr;
164 PerfCounter* CompileBroker::_perf_standard_compilation = nullptr;
165
166 PerfCounter* CompileBroker::_perf_total_bailout_count = nullptr;
167 PerfCounter* CompileBroker::_perf_total_invalidated_count = nullptr;
168 PerfCounter* CompileBroker::_perf_total_compile_count = nullptr;
169 PerfCounter* CompileBroker::_perf_total_osr_compile_count = nullptr;
170 PerfCounter* CompileBroker::_perf_total_standard_compile_count = nullptr;
171
172 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = nullptr;
173 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = nullptr;
174 PerfCounter* CompileBroker::_perf_sum_nmethod_size = nullptr;
175 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = nullptr;
176
177 PerfStringVariable* CompileBroker::_perf_last_method = nullptr;
178 PerfStringVariable* CompileBroker::_perf_last_failed_method = nullptr;
179 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = nullptr;
180 PerfVariable* CompileBroker::_perf_last_compile_type = nullptr;
181 PerfVariable* CompileBroker::_perf_last_compile_size = nullptr;
182 PerfVariable* CompileBroker::_perf_last_failed_type = nullptr;
183 PerfVariable* CompileBroker::_perf_last_invalidated_type = nullptr;
184
185 // Timers and counters for generating statistics
186 elapsedTimer CompileBroker::_t_total_compilation;
187 elapsedTimer CompileBroker::_t_osr_compilation;
188 elapsedTimer CompileBroker::_t_standard_compilation;
189 elapsedTimer CompileBroker::_t_invalidated_compilation;
190 elapsedTimer CompileBroker::_t_bailedout_compilation;
191
192 uint CompileBroker::_total_bailout_count = 0;
193 uint CompileBroker::_total_invalidated_count = 0;
194 uint CompileBroker::_total_not_entrant_count = 0;
195 uint CompileBroker::_total_compile_count = 0;
196 uint CompileBroker::_total_osr_compile_count = 0;
197 uint CompileBroker::_total_standard_compile_count = 0;
198 uint CompileBroker::_total_compiler_stopped_count = 0;
199 uint CompileBroker::_total_compiler_restarted_count = 0;
200
201 uint CompileBroker::_sum_osr_bytes_compiled = 0;
202 uint CompileBroker::_sum_standard_bytes_compiled = 0;
203 uint CompileBroker::_sum_nmethod_size = 0;
204 uint CompileBroker::_sum_nmethod_code_size = 0;
205
206 jlong CompileBroker::_peak_compilation_time = 0;
207
208 CompilerStatistics CompileBroker::_stats_per_level[CompLevel_full_optimization];
209 CompilerStatistics CompileBroker::_scc_stats;
210 CompilerStatistics CompileBroker::_scc_stats_per_level[CompLevel_full_optimization + 1];
211
212 CompileQueue* CompileBroker::_c3_compile_queue = nullptr;
213 CompileQueue* CompileBroker::_c2_compile_queue = nullptr;
214 CompileQueue* CompileBroker::_c1_compile_queue = nullptr;
215 CompileQueue* CompileBroker::_sc1_compile_queue = nullptr;
216 CompileQueue* CompileBroker::_sc2_compile_queue = nullptr;
217
218 bool compileBroker_init() {
219 if (LogEvents) {
220 CompilationLog::init();
221 }
222
223 // init directives stack, adding default directive
224 DirectivesStack::init();
225
226 if (DirectivesParser::has_file()) {
227 return DirectivesParser::parse_from_flag();
228 } else if (CompilerDirectivesPrint) {
229 // Print default directive even when no other was added
230 DirectivesStack::print(tty);
231 }
232
233 return true;
234 }
235
236 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
237 CompilerThread* thread = CompilerThread::current();
238 thread->set_task(task);
239 CompileLog* log = thread->log();
240 if (log != nullptr && !task->is_unloaded()) task->log_task_start(log);
241 }
242
243 CompileTaskWrapper::~CompileTaskWrapper() {
244 CompilerThread* thread = CompilerThread::current();
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, task->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 free 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 task->lock()->notify_all();
269 }
270 }
271 if (free_task) {
272 // The task can only be freed once the task lock is released.
273 CompileTask::free(task);
274 }
275 } else {
276 task->mark_complete();
277
278 // By convention, the compiling thread is responsible for
279 // recycling a non-blocking CompileTask.
280 CompileTask::free(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 (CompilationPolicy::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() &&
376 !CDSConfig::is_dumping_final_static_archive()) { // FIXME: !!! MetaspaceShared::preload_and_dump() temporarily enables RecordTraining !!!
377 CompileTrainingData* tdata = CompileTrainingData::make(task);
378 if (tdata != nullptr) {
379 tdata->record_compilation_queued(task);
380 task->set_training_data(tdata);
381 }
382 }
383
384 // Notify CompilerThreads that a task is available.
385 _lock->notify_all();
386 }
387
388 void CompileQueue::add_pending(CompileTask* task) {
389 assert(_lock->owned_by_self() == false, "must NOT own lock");
390 assert(UseLockFreeCompileQueues, "");
391 task->method()->set_queued_for_compilation();
392 _queue.push(*task);
393 // FIXME: additional coordination needed? e.g., is it possible for compiler thread to block w/o processing pending tasks?
394 if (is_empty()) {
395 MutexLocker ml(_lock);
396 _lock->notify_all();
397 }
398 }
399
400 static bool process_pending(CompileTask* task) {
401 // guarantee(task->method()->queued_for_compilation(), "");
402 if (task->is_unloaded()) {
403 return true; // unloaded
404 }
405 task->method()->set_queued_for_compilation(); // FIXME
406 if (task->method()->pending_queue_processed()) {
407 return true; // already queued
408 }
409 // Mark the method as being in the compile queue.
410 task->method()->set_pending_queue_processed();
411 if (CompileBroker::compilation_is_complete(task->method(), task->osr_bci(), task->comp_level(),
412 task->requires_online_compilation(), task->compile_reason())) {
413 return true; // already compiled
414 }
415 return false; // active
416 }
417
418 void CompileQueue::transfer_pending() {
419 assert(_lock->owned_by_self(), "must own lock");
420 while (!_queue.empty()) {
421 CompileTask* task = _queue.pop();
422 bool is_stale = process_pending(task);
423 if (is_stale) {
424 task->set_next(_first_stale);
425 task->set_prev(nullptr);
426 _first_stale = task;
427 } else {
428 add(task);
429 }
430 }
431 }
432
433 /**
434 * Empties compilation queue by putting all compilation tasks onto
435 * a freelist. Furthermore, the method wakes up all threads that are
436 * waiting on a compilation task to finish. This can happen if background
437 * compilation is disabled.
438 */
439 void CompileQueue::free_all() {
440 MutexLocker mu(_lock);
441 transfer_pending();
442
443 CompileTask* next = _first;
444
445 // Iterate over all tasks in the compile queue
446 while (next != nullptr) {
447 CompileTask* current = next;
448 next = current->next();
449 {
450 // Wake up thread that blocks on the compile task.
451 MutexLocker ct_lock(current->lock());
452 current->lock()->notify();
453 }
454 // Put the task back on the freelist.
455 CompileTask::free(current);
456 }
457 _first = nullptr;
458 _last = nullptr;
459
460 // Wake up all threads that block on the queue.
461 _lock->notify_all();
462 }
463
464 /**
465 * Get the next CompileTask from a CompileQueue
466 */
467 CompileTask* CompileQueue::get(CompilerThread* thread) {
468 // save methods from RedefineClasses across safepoint
469 // across compile queue lock below.
470 methodHandle save_method;
471 methodHandle save_hot_method;
472
473 MonitorLocker locker(_lock);
474 transfer_pending();
475
476 CompilationPolicy::sample_load_average();
477
478 // If _first is null we have no more compile jobs. There are two reasons for
479 // having no compile jobs: First, we compiled everything we wanted. Second,
480 // we ran out of code cache so compilation has been disabled. In the latter
481 // case we perform code cache sweeps to free memory such that we can re-enable
482 // compilation.
483 while (_first == nullptr) {
484 // Exit loop if compilation is disabled forever
485 if (CompileBroker::is_compilation_disabled_forever()) {
486 return nullptr;
487 }
488
489 AbstractCompiler* compiler = thread->compiler();
490 guarantee(compiler != nullptr, "Compiler object must exist");
491 compiler->on_empty_queue(this, thread);
492 if (_first != nullptr) {
493 // The call to on_empty_queue may have temporarily unlocked the MCQ lock
494 // so check again whether any tasks were added to the queue.
495 break;
496 }
497
498 // If there are no compilation tasks and we can compile new jobs
499 // (i.e., there is enough free space in the code cache) there is
500 // no need to invoke the GC.
501 // We need a timed wait here, since compiler threads can exit if compilation
502 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
503 // is not critical and we do not want idle compiler threads to wake up too often.
504 locker.wait(5*1000);
505
506 transfer_pending(); // reacquired lock
507
508 if (CompilationPolicy::have_recompilation_work()) return nullptr;
509
510 if (UseDynamicNumberOfCompilerThreads && _first == nullptr) {
511 // Still nothing to compile. Give caller a chance to stop this thread.
512 if (CompileBroker::can_remove(CompilerThread::current(), false)) return nullptr;
513 }
514 }
515
516 if (CompileBroker::is_compilation_disabled_forever()) {
517 return nullptr;
518 }
519
520 CompileTask* task;
521 {
522 NoSafepointVerifier nsv;
523 task = CompilationPolicy::select_task(this, thread);
524 if (task != nullptr) {
525 task = task->select_for_compilation();
526 }
527 }
528
529 if (task != nullptr) {
530 // Save method pointers across unlock safepoint. The task is removed from
531 // the compilation queue, which is walked during RedefineClasses.
532 Thread* thread = Thread::current();
533 save_method = methodHandle(thread, task->method());
534 save_hot_method = methodHandle(thread, task->hot_method());
535
536 remove(task);
537 }
538 purge_stale_tasks(); // may temporarily release MCQ lock
539 return task;
540 }
541
542 // Clean & deallocate stale compile tasks.
543 // Temporarily releases MethodCompileQueue lock.
544 void CompileQueue::purge_stale_tasks() {
545 assert(_lock->owned_by_self(), "must own lock");
546 if (_first_stale != nullptr) {
547 // Stale tasks are purged when MCQ lock is released,
548 // but _first_stale updates are protected by MCQ lock.
549 // Once task processing starts and MCQ lock is released,
550 // other compiler threads can reuse _first_stale.
551 CompileTask* head = _first_stale;
552 _first_stale = nullptr;
553 {
554 MutexUnlocker ul(_lock);
555 for (CompileTask* task = head; task != nullptr; ) {
556 CompileTask* next_task = task->next();
557 CompileTaskWrapper ctw(task); // Frees the task
558 task->set_failure_reason("stale task");
559 task = next_task;
560 }
561 }
562 transfer_pending(); // transfer pending after reacquiring MCQ lock
563 }
564 }
565
566 void CompileQueue::remove(CompileTask* task) {
567 assert(_lock->owned_by_self(), "must own lock");
568 if (task->prev() != nullptr) {
569 task->prev()->set_next(task->next());
570 } else {
571 // max is the first element
572 assert(task == _first, "Sanity");
573 _first = task->next();
574 }
575
576 if (task->next() != nullptr) {
577 task->next()->set_prev(task->prev());
578 } else {
579 // max is the last element
580 assert(task == _last, "Sanity");
581 _last = task->prev();
582 }
583 --_size;
584 ++_total_removed;
585 }
586
587 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
588 assert(_lock->owned_by_self(), "must own lock");
589 remove(task);
590
591 // Enqueue the task for reclamation (should be done outside MCQ lock)
592 task->set_next(_first_stale);
593 task->set_prev(nullptr);
594 _first_stale = task;
595 }
596
597 // methods in the compile queue need to be marked as used on the stack
598 // so that they don't get reclaimed by Redefine Classes
599 void CompileQueue::mark_on_stack() {
600 for (CompileTask* task = _first; task != nullptr; task = task->next()) {
601 task->mark_on_stack();
602 }
603 for (CompileTask* task = _queue.first(); !_queue.is_end(task); task = task->next()) {
604 assert(task != nullptr, "");
605 task->mark_on_stack();
606 }
607 }
608
609
610 CompileQueue* CompileBroker::compile_queue(int comp_level, bool is_scc) {
611 if (is_c2_compile(comp_level)) return (is_scc ? _sc2_compile_queue : _c2_compile_queue);
612 if (is_c1_compile(comp_level)) return (is_scc ? _sc1_compile_queue : _c1_compile_queue);
613 return nullptr;
614 }
615
616 CompileQueue* CompileBroker::c1_compile_queue() {
617 return _c1_compile_queue;
618 }
619
620 CompileQueue* CompileBroker::c2_compile_queue() {
621 return _c2_compile_queue;
622 }
623
624 void CompileBroker::print_compile_queues(outputStream* st) {
625 st->print_cr("Current compiles: ");
626
627 char buf[2000];
628 int buflen = sizeof(buf);
629 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
630
631 st->cr();
632 if (_c1_compile_queue != nullptr) {
633 _c1_compile_queue->print(st);
634 }
635 if (_c2_compile_queue != nullptr) {
636 _c2_compile_queue->print(st);
637 }
638 if (_c3_compile_queue != nullptr) {
639 _c3_compile_queue->print(st);
640 }
641 if (_sc1_compile_queue != nullptr) {
642 _sc1_compile_queue->print(st);
643 }
644 if (_sc2_compile_queue != nullptr) {
645 _sc2_compile_queue->print(st);
646 }
647 }
648
649 void CompileQueue::print(outputStream* st) {
650 assert_locked_or_safepoint(_lock);
651 st->print_cr("%s:", name());
652 CompileTask* task = _first;
653 if (task == nullptr) {
654 st->print_cr("Empty");
655 } else {
656 while (task != nullptr) {
657 task->print(st, nullptr, true, true);
658 task = task->next();
659 }
660 }
661 st->cr();
662 }
663
664 void CompileQueue::print_tty() {
665 stringStream ss;
666 // Dump the compile queue into a buffer before locking the tty
667 print(&ss);
668 {
669 ttyLocker ttyl;
670 tty->print("%s", ss.freeze());
697 CompilerEvent::PhaseEvent::get_phase_id(phase_name, false, false, false);
698 }
699 first_registration = false;
700 #endif // COMPILER2
701 }
702 }
703 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
704
705 // ------------------------------------------------------------------
706 // CompileBroker::compilation_init
707 //
708 // Initialize the Compilation object
709 void CompileBroker::compilation_init(JavaThread* THREAD) {
710 // No need to initialize compilation system if we do not use it.
711 if (!UseCompiler) {
712 return;
713 }
714 // Set the interface to the current compiler(s).
715 _c1_count = CompilationPolicy::c1_count();
716 _c2_count = CompilationPolicy::c2_count();
717 _c3_count = CompilationPolicy::c3_count();
718 _sc_count = CompilationPolicy::sc_count();
719
720 #if INCLUDE_JVMCI
721 if (EnableJVMCI) {
722 // This is creating a JVMCICompiler singleton.
723 JVMCICompiler* jvmci = new JVMCICompiler();
724
725 if (UseJVMCICompiler) {
726 _compilers[1] = jvmci;
727 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
728 if (BootstrapJVMCI) {
729 // JVMCI will bootstrap so give it more threads
730 _c2_count = MIN2(32, os::active_processor_count());
731 }
732 } else {
733 _c2_count = JVMCIThreads;
734 }
735 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
736 } else {
737 #ifdef COMPILER1
738 _c1_count = JVMCIHostThreads;
739 #endif // COMPILER1
740 }
741 #ifdef COMPILER2
742 if (SCCache::is_on() && (_c3_count > 0)) {
743 _compilers[2] = new C2Compiler();
744 }
745 #endif
746 }
747 }
748 #endif // INCLUDE_JVMCI
749
750 #ifdef COMPILER1
751 if (_c1_count > 0) {
752 _compilers[0] = new Compiler();
753 }
754 #endif // COMPILER1
755
756 #ifdef COMPILER2
757 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
758 if (_c2_count > 0) {
759 _compilers[1] = new C2Compiler();
760 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
761 // idToPhase mapping for c2 is in opto/phasetype.hpp
762 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
763 }
764 }
765 #endif // COMPILER2
860 _perf_last_compile_size =
861 PerfDataManager::create_variable(SUN_CI, "lastSize",
862 PerfData::U_Bytes,
863 (jlong)CompileBroker::no_compile,
864 CHECK);
865
866
867 _perf_last_failed_type =
868 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
869 PerfData::U_None,
870 (jlong)CompileBroker::no_compile,
871 CHECK);
872
873 _perf_last_invalidated_type =
874 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
875 PerfData::U_None,
876 (jlong)CompileBroker::no_compile,
877 CHECK);
878 }
879
880 log_info(scc, init)("CompileBroker is initialized");
881 _initialized = true;
882 }
883
884 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
885 Handle thread_oop = JavaThread::create_system_thread_object(name, CHECK_NH);
886 return thread_oop;
887 }
888
889 void TrainingReplayThread::training_replay_thread_entry(JavaThread* thread, TRAPS) {
890 CompilationPolicy::replay_training_at_init_loop(thread);
891 }
892
893 #if defined(ASSERT) && COMPILER2_OR_JVMCI
894 // Stress testing. Dedicated threads revert optimizations based on escape analysis concurrently to
895 // the running java application. Configured with vm options DeoptimizeObjectsALot*.
896 class DeoptimizeObjectsALotThread : public JavaThread {
897
898 static void deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS);
899 void deoptimize_objects_alot_loop_single();
900 void deoptimize_objects_alot_loop_all();
901
902 public:
903 DeoptimizeObjectsALotThread() : JavaThread(&deopt_objs_alot_thread_entry) { }
904
905 bool is_hidden_from_external_view() const { return true; }
906 };
907
908 // Entry for DeoptimizeObjectsALotThread. The threads are started in
909 // CompileBroker::init_compiler_threads() iff DeoptimizeObjectsALot is enabled
910 void DeoptimizeObjectsALotThread::deopt_objs_alot_thread_entry(JavaThread* thread, TRAPS) {
911 DeoptimizeObjectsALotThread* dt = ((DeoptimizeObjectsALotThread*) thread);
912 bool enter_single_loop;
964 if (java_lang_Thread::thread(thread_oop()) != nullptr) {
965 assert(type == compiler_t, "should only happen with reused compiler threads");
966 // The compiler thread hasn't actually exited yet so don't try to reuse it
967 return nullptr;
968 }
969
970 JavaThread* new_thread = nullptr;
971 switch (type) {
972 case compiler_t:
973 assert(comp != nullptr, "Compiler instance missing.");
974 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
975 CompilerCounters* counters = new CompilerCounters();
976 new_thread = new CompilerThread(queue, counters);
977 }
978 break;
979 #if defined(ASSERT) && COMPILER2_OR_JVMCI
980 case deoptimizer_t:
981 new_thread = new DeoptimizeObjectsALotThread();
982 break;
983 #endif // ASSERT
984 case training_replay_t:
985 new_thread = new TrainingReplayThread();
986 break;
987 default:
988 ShouldNotReachHere();
989 }
990
991 // At this point the new CompilerThread data-races with this startup
992 // thread (which is the main thread and NOT the VM thread).
993 // This means Java bytecodes being executed at startup can
994 // queue compile jobs which will run at whatever default priority the
995 // newly created CompilerThread runs at.
996
997
998 // At this point it may be possible that no osthread was created for the
999 // JavaThread due to lack of resources. We will handle that failure below.
1000 // Also check new_thread so that static analysis is happy.
1001 if (new_thread != nullptr && new_thread->osthread() != nullptr) {
1002
1003 if (type == compiler_t) {
1004 CompilerThread::cast(new_thread)->set_compiler(comp);
1005 }
1006
1046 }
1047
1048 static jobject create_compiler_thread(AbstractCompiler* compiler, int i, TRAPS) {
1049 char name_buffer[256];
1050 os::snprintf_checked(name_buffer, sizeof(name_buffer), "%s CompilerThread%d", compiler->name(), i);
1051 Handle thread_oop = JavaThread::create_system_thread_object(name_buffer, CHECK_NULL);
1052 return JNIHandles::make_global(thread_oop);
1053 }
1054
1055 static void print_compiler_threads(stringStream& msg) {
1056 if (TraceCompilerThreads) {
1057 tty->print_cr("%7d %s", (int)tty->time_stamp().milliseconds(), msg.as_string());
1058 }
1059 LogTarget(Debug, jit, thread) lt;
1060 if (lt.is_enabled()) {
1061 LogStream ls(lt);
1062 ls.print_cr("%s", msg.as_string());
1063 }
1064 }
1065
1066 static void print_compiler_thread(JavaThread *ct) {
1067 if (trace_compiler_threads()) {
1068 ResourceMark rm;
1069 ThreadsListHandle tlh; // name() depends on the TLH.
1070 assert(tlh.includes(ct), "ct=" INTPTR_FORMAT " exited unexpectedly.", p2i(ct));
1071 stringStream msg;
1072 msg.print("Added initial compiler thread %s", ct->name());
1073 print_compiler_threads(msg);
1074 }
1075 }
1076
1077 void CompileBroker::init_compiler_threads() {
1078 // Ensure any exceptions lead to vm_exit_during_initialization.
1079 EXCEPTION_MARK;
1080 #if !defined(ZERO)
1081 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
1082 #endif // !ZERO
1083 // Initialize the compilation queue
1084 if (_c2_count > 0) {
1085 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
1086 _c2_compile_queue = new CompileQueue(name, MethodCompileQueueC2_lock);
1087 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
1088 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
1089 }
1090 if (_c1_count > 0) {
1091 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueueC1_lock);
1092 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
1093 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
1094 }
1095
1096 if (_c3_count > 0) {
1097 const char* name = "C2 compile queue";
1098 _c3_compile_queue = new CompileQueue(name, MethodCompileQueueC3_lock);
1099 _compiler3_objects = NEW_C_HEAP_ARRAY(jobject, _c3_count, mtCompiler);
1100 _compiler3_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c3_count, mtCompiler);
1101 }
1102 if (_sc_count > 0) {
1103 if (_c1_count > 0) { // C1 is present
1104 _sc1_compile_queue = new CompileQueue("C1 SC compile queue", MethodCompileQueueSC1_lock);
1105 }
1106 if (_c2_count > 0) { // C2 is present
1107 _sc2_compile_queue = new CompileQueue("C2 SC compile queue", MethodCompileQueueSC2_lock);
1108 }
1109 _sc_objects = NEW_C_HEAP_ARRAY(jobject, _sc_count, mtCompiler);
1110 _sc_logs = NEW_C_HEAP_ARRAY(CompileLog*, _sc_count, mtCompiler);
1111 }
1112 char name_buffer[256];
1113
1114 for (int i = 0; i < _c2_count; i++) {
1115 // Create a name for our thread.
1116 jobject thread_handle = create_compiler_thread(_compilers[1], i, CHECK);
1117 _compiler2_objects[i] = thread_handle;
1118 _compiler2_logs[i] = nullptr;
1119
1120 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1121 JavaThread *ct = make_thread(compiler_t, thread_handle, _c2_compile_queue, _compilers[1], THREAD);
1122 assert(ct != nullptr, "should have been handled for initial thread");
1123 _compilers[1]->set_num_compiler_threads(i + 1);
1124 print_compiler_thread(ct);
1125 }
1126 }
1127
1128 for (int i = 0; i < _c1_count; i++) {
1129 // Create a name for our thread.
1130 jobject thread_handle = create_compiler_thread(_compilers[0], i, CHECK);
1131 _compiler1_objects[i] = thread_handle;
1132 _compiler1_logs[i] = nullptr;
1133
1134 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
1135 JavaThread *ct = make_thread(compiler_t, thread_handle, _c1_compile_queue, _compilers[0], THREAD);
1136 assert(ct != nullptr, "should have been handled for initial thread");
1137 _compilers[0]->set_num_compiler_threads(i + 1);
1138 print_compiler_thread(ct);
1139 }
1140 }
1141
1142 for (int i = 0; i < _c3_count; i++) {
1143 // Create a name for our thread.
1144 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C2 CompilerThread%d", i);
1145 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1146 jobject thread_handle = JNIHandles::make_global(thread_oop);
1147 _compiler3_objects[i] = thread_handle;
1148 _compiler3_logs[i] = nullptr;
1149
1150 JavaThread *ct = make_thread(compiler_t, thread_handle, _c3_compile_queue, _compilers[2], THREAD);
1151 assert(ct != nullptr, "should have been handled for initial thread");
1152 _compilers[2]->set_num_compiler_threads(i + 1);
1153 print_compiler_thread(ct);
1154 }
1155
1156 if (_sc_count > 0) {
1157 int i = 0;
1158 if (_c1_count > 0) { // C1 is present
1159 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 1);
1160 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1161 jobject thread_handle = JNIHandles::make_global(thread_oop);
1162 _sc_objects[i] = thread_handle;
1163 _sc_logs[i] = nullptr;
1164 i++;
1165
1166 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc1_compile_queue, _compilers[0], THREAD);
1167 assert(ct != nullptr, "should have been handled for initial thread");
1168 print_compiler_thread(ct);
1169 }
1170 if (_c2_count > 0) { // C2 is present
1171 os::snprintf_checked(name_buffer, sizeof(name_buffer), "C%d SC CompilerThread", 2);
1172 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
1173 jobject thread_handle = JNIHandles::make_global(thread_oop);
1174 _sc_objects[i] = thread_handle;
1175 _sc_logs[i] = nullptr;
1176
1177 JavaThread *ct = make_thread(compiler_t, thread_handle, _sc2_compile_queue, _compilers[1], THREAD);
1178 assert(ct != nullptr, "should have been handled for initial thread");
1179 print_compiler_thread(ct);
1180 }
1181 }
1182
1183 if (UsePerfData) {
1184 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count + _c3_count, CHECK);
1185 }
1186
1187 #if defined(ASSERT) && COMPILER2_OR_JVMCI
1188 if (DeoptimizeObjectsALot) {
1189 // Initialize and start the object deoptimizer threads
1190 const int total_count = DeoptimizeObjectsALotThreadCountSingle + DeoptimizeObjectsALotThreadCountAll;
1191 for (int count = 0; count < total_count; count++) {
1192 Handle thread_oop = JavaThread::create_system_thread_object("Deoptimize objects a lot single mode", CHECK);
1193 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1194 make_thread(deoptimizer_t, thread_handle, nullptr, nullptr, THREAD);
1195 }
1196 }
1197 #endif // defined(ASSERT) && COMPILER2_OR_JVMCI
1198 }
1199
1200 void CompileBroker::init_training_replay() {
1201 // Ensure any exceptions lead to vm_exit_during_initialization.
1202 EXCEPTION_MARK;
1203 if (TrainingData::have_data()) {
1204 if (UseConcurrentTrainingReplay) {
1205 Handle thread_oop = create_thread_oop("Training replay thread", CHECK);
1206 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
1207 make_thread(training_replay_t, thread_handle, nullptr, nullptr, THREAD);
1208 }
1209 _replay_initialized = true;
1210 }
1211 }
1212
1213 void CompileBroker::possibly_add_compiler_threads(JavaThread* THREAD) {
1214
1215 julong free_memory = os::free_memory();
1216 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
1217 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
1218 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
1219
1220 // Only do attempt to start additional threads if the lock is free.
1221 if (!CompileThread_lock->try_lock()) return;
1222
1223 if (_c2_compile_queue != nullptr) {
1224 int old_c2_count = _compilers[1]->num_compiler_threads();
1225 int new_c2_count = MIN4(_c2_count,
1226 _c2_compile_queue->size() / 2,
1227 (int)(free_memory / (200*M)),
1228 (int)(available_cc_np / (128*K)));
1229
1230 for (int i = old_c2_count; i < new_c2_count; i++) {
1231 #if INCLUDE_JVMCI
1232 if (UseJVMCICompiler && !UseJVMCINativeLibrary && _compiler2_objects[i] == nullptr) {
1299 stringStream msg;
1300 msg.print("Added compiler thread %s (free memory: %dMB, available profiled code cache: %dMB)",
1301 ct->name(), (int)(free_memory/M), (int)(available_cc_p/M));
1302 print_compiler_threads(msg);
1303 }
1304 }
1305 }
1306
1307 CompileThread_lock->unlock();
1308 }
1309
1310
1311 /**
1312 * Set the methods on the stack as on_stack so that redefine classes doesn't
1313 * reclaim them. This method is executed at a safepoint.
1314 */
1315 void CompileBroker::mark_on_stack() {
1316 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1317 // Since we are at a safepoint, we do not need a lock to access
1318 // the compile queues.
1319 if (_c3_compile_queue != nullptr) {
1320 _c3_compile_queue->mark_on_stack();
1321 }
1322 if (_c2_compile_queue != nullptr) {
1323 _c2_compile_queue->mark_on_stack();
1324 }
1325 if (_c1_compile_queue != nullptr) {
1326 _c1_compile_queue->mark_on_stack();
1327 }
1328 if (_sc1_compile_queue != nullptr) {
1329 _sc1_compile_queue->mark_on_stack();
1330 }
1331 if (_sc2_compile_queue != nullptr) {
1332 _sc2_compile_queue->mark_on_stack();
1333 }
1334 }
1335
1336 // ------------------------------------------------------------------
1337 // CompileBroker::compile_method
1338 //
1339 // Request compilation of a method.
1340 void CompileBroker::compile_method_base(const methodHandle& method,
1341 int osr_bci,
1342 int comp_level,
1343 const methodHandle& hot_method,
1344 int hot_count,
1345 CompileTask::CompileReason compile_reason,
1346 bool requires_online_compilation,
1347 bool blocking,
1348 Thread* thread) {
1349 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1350 assert(method->method_holder()->is_instance_klass(),
1351 "sanity check");
1352 assert(!method->method_holder()->is_not_initialized() ||
1353 compile_reason == CompileTask::Reason_Preload ||
1354 compile_reason == CompileTask::Reason_Precompile ||
1355 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1356 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1357
1358 if (CIPrintRequests) {
1359 tty->print("request: ");
1360 method->print_short_name(tty);
1361 if (osr_bci != InvocationEntryBci) {
1362 tty->print(" osr_bci: %d", osr_bci);
1363 }
1364 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1365 if (!hot_method.is_null()) {
1366 tty->print(" hot: ");
1367 if (hot_method() != method()) {
1368 hot_method->print_short_name(tty);
1369 } else {
1370 tty->print("yes");
1371 }
1372 }
1373 tty->cr();
1374 }
1375
1376 // A request has been made for compilation. Before we do any
1377 // real work, check to see if the method has been compiled
1378 // in the meantime with a definitive result.
1379 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1380 return;
1381 }
1382
1383 #ifndef PRODUCT
1384 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1385 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1386 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1387 return;
1388 }
1389 }
1390 #endif
1391
1392 // If this method is already in the compile queue, then
1393 // we do not block the current thread.
1394 if (compilation_is_in_queue(method)) {
1395 // We may want to decay our counter a bit here to prevent
1396 // multiple denied requests for compilation. This is an
1397 // open compilation policy issue. Note: The other possibility,
1398 // in the case that this is a blocking compile request, is to have
1399 // all subsequent blocking requesters wait for completion of
1400 // ongoing compiles. Note that in this case we'll need a protocol
1401 // for freeing the associated compile tasks. [Or we could have
1402 // a single static monitor on which all these waiters sleep.]
1403 return;
1404 }
1405
1406 // Tiered policy requires MethodCounters to exist before adding a method to
1407 // the queue. Create if we don't have them yet.
1408 if (compile_reason != CompileTask::Reason_Preload) {
1409 method->get_method_counters(thread);
1410 }
1411
1412 SCCEntry* scc_entry = find_scc_entry(method, osr_bci, comp_level, compile_reason, requires_online_compilation);
1413 bool is_scc = (scc_entry != nullptr);
1414
1415 // Outputs from the following MutexLocker block:
1416 CompileTask* task = nullptr;
1417 CompileQueue* queue;
1418 #if INCLUDE_JVMCI
1419 if (is_c2_compile(comp_level) && compiler2()->is_jvmci() && compiler3() != nullptr &&
1420 ((JVMCICompiler*)compiler2())->force_comp_at_level_simple(method)) {
1421 assert(_c3_compile_queue != nullptr, "sanity");
1422 queue = _c3_compile_queue; // JVMCI compiler's methods compilation
1423 } else
1424 #endif
1425 queue = compile_queue(comp_level, is_scc);
1426
1427 // Acquire our lock.
1428 {
1429 ConditionalMutexLocker locker(thread, queue->lock(), !UseLockFreeCompileQueues);
1430
1431 // Make sure the method has not slipped into the queues since
1432 // last we checked; note that those checks were "fast bail-outs".
1433 // Here we need to be more careful, see 14012000 below.
1434 if (compilation_is_in_queue(method)) {
1435 return;
1436 }
1437
1438 // We need to check again to see if the compilation has
1439 // completed. A previous compilation may have registered
1440 // some result.
1441 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1442 return;
1443 }
1444
1445 // We now know that this compilation is not pending, complete,
1446 // or prohibited. Assign a compile_id to this compilation
1447 // and check to see if it is in our [Start..Stop) range.
1448 int compile_id = assign_compile_id(method, osr_bci);
1449 if (compile_id == 0) {
1450 // The compilation falls outside the allowed range.
1451 return;
1452 }
1453
1454 #if INCLUDE_JVMCI
1455 if (UseJVMCICompiler && blocking) {
1456 // Don't allow blocking compiles for requests triggered by JVMCI.
1457 if (thread->is_Compiler_thread()) {
1458 blocking = false;
1459 }
1460
1461 // In libjvmci, JVMCI initialization should not deadlock with other threads
1511 // <RESULT, QUEUE> :
1512 // <0, 1> : in compile queue, but not yet compiled
1513 // <1, 1> : compiled but queue bit not cleared
1514 // <1, 0> : compiled and queue bit cleared
1515 // Because we first check the queue bits then check the result bits,
1516 // we are assured that we cannot introduce a duplicate task.
1517 // Note that if we did the tests in the reverse order (i.e. check
1518 // result then check queued bit), we could get the result bit before
1519 // the compilation completed, and the queue bit after the compilation
1520 // completed, and end up introducing a "duplicate" (redundant) task.
1521 // In that case, the compiler thread should first check if a method
1522 // has already been compiled before trying to compile it.
1523 // NOTE: in the event that there are multiple compiler threads and
1524 // there is de-optimization/recompilation, things will get hairy,
1525 // and in that case it's best to protect both the testing (here) of
1526 // these bits, and their updating (here and elsewhere) under a
1527 // common lock.
1528 task = create_compile_task(queue,
1529 compile_id, method,
1530 osr_bci, comp_level,
1531 hot_method, hot_count, scc_entry, compile_reason,
1532 requires_online_compilation, blocking);
1533
1534 if (task->is_scc() && (_sc_count > 0)) {
1535 // Put it on SC queue
1536 queue = is_c1_compile(comp_level) ? _sc1_compile_queue : _sc2_compile_queue;
1537 }
1538
1539 if (UseLockFreeCompileQueues) {
1540 assert(queue->lock()->owned_by_self() == false, "");
1541 queue->add_pending(task);
1542 } else {
1543 queue->add(task);
1544 }
1545 }
1546
1547 if (blocking) {
1548 wait_for_completion(task);
1549 }
1550 }
1551
1552 SCCEntry* CompileBroker::find_scc_entry(const methodHandle& method, int osr_bci, int comp_level,
1553 CompileTask::CompileReason compile_reason,
1554 bool requires_online_compilation) {
1555 SCCEntry* scc_entry = nullptr;
1556 if (_sc_count > 0 && osr_bci == InvocationEntryBci && !requires_online_compilation && SCCache::is_on_for_read()) {
1557 // Check for cached code.
1558 if (compile_reason == CompileTask::Reason_Preload) {
1559 scc_entry = method->scc_entry();
1560 assert(scc_entry != nullptr && scc_entry->for_preload(), "sanity");
1561 } else {
1562 scc_entry = SCCache::find_code_entry(method, comp_level);
1563 }
1564 }
1565 return scc_entry;
1566 }
1567
1568 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1569 int comp_level,
1570 const methodHandle& hot_method, int hot_count,
1571 bool requires_online_compilation,
1572 CompileTask::CompileReason compile_reason,
1573 TRAPS) {
1574 // Do nothing if compilebroker is not initialized or compiles are submitted on level none
1575 if (!_initialized || comp_level == CompLevel_none) {
1576 return nullptr;
1577 }
1578
1579 #if INCLUDE_JVMCI
1580 if (EnableJVMCI && UseJVMCICompiler &&
1581 comp_level == CompLevel_full_optimization && !ClassPreloader::class_preloading_finished()) {
1582 return nullptr;
1583 }
1584 #endif
1585
1586 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1587 assert(comp != nullptr, "Ensure we have a compiler");
1588
1589 #if INCLUDE_JVMCI
1590 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1591 // JVMCI compilation is not yet initializable.
1592 return nullptr;
1593 }
1594 #endif
1595
1596 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1597 // CompileBroker::compile_method can trap and can have pending async exception.
1598 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, requires_online_compilation, compile_reason, directive, THREAD);
1599 DirectivesStack::release(directive);
1600 return nm;
1601 }
1602
1603 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1604 int comp_level,
1605 const methodHandle& hot_method, int hot_count,
1606 bool requires_online_compilation,
1607 CompileTask::CompileReason compile_reason,
1608 DirectiveSet* directive,
1609 TRAPS) {
1610
1611 // make sure arguments make sense
1612 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1613 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1614 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1615 assert(!method->method_holder()->is_not_initialized() ||
1616 compile_reason == CompileTask::Reason_Preload ||
1617 compile_reason == CompileTask::Reason_Precompile ||
1618 compile_reason == CompileTask::Reason_PrecompileForPreload, "method holder must be initialized");
1619 // return quickly if possible
1620
1621 if (PrecompileOnlyAndExit && !CompileTask::reason_is_precompiled(compile_reason)) {
1622 return nullptr;
1623 }
1624
1625 // lock, make sure that the compilation
1626 // isn't prohibited in a straightforward way.
1627 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1628 if (comp == nullptr || compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1629 return nullptr;
1630 }
1631
1632 if (osr_bci == InvocationEntryBci) {
1633 // standard compilation
1634 nmethod* method_code = method->code();
1635 if (method_code != nullptr) {
1636 if (compilation_is_complete(method(), osr_bci, comp_level, requires_online_compilation, compile_reason)) {
1637 return method_code;
1638 }
1639 }
1640 if (method->is_not_compilable(comp_level)) {
1641 return nullptr;
1642 }
1643 } else {
1644 // osr compilation
1645 // We accept a higher level osr method
1646 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1647 if (nm != nullptr) return nm;
1648 if (method->is_not_osr_compilable(comp_level)) return nullptr;
1649 }
1650
1651 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1652 // some prerequisites that are compiler specific
1653 if (compile_reason != CompileTask::Reason_Preload && (comp->is_c2() || comp->is_jvmci())) {
1654 InternalOOMEMark iom(THREAD);
1655 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NONASYNC_NULL);
1656 // Resolve all classes seen in the signature of the method
1657 // we are compiling.
1658 Method::load_signature_classes(method, CHECK_AND_CLEAR_NONASYNC_NULL);
1659 }
1660
1661 // If the method is native, do the lookup in the thread requesting
1662 // the compilation. Native lookups can load code, which is not
1663 // permitted during compilation.
1664 //
1665 // Note: A native method implies non-osr compilation which is
1666 // checked with an assertion at the entry of this method.
1667 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1668 address adr = NativeLookup::lookup(method, THREAD);
1669 if (HAS_PENDING_EXCEPTION) {
1670 // In case of an exception looking up the method, we just forget
1671 // about it. The interpreter will kick-in and throw the exception.
1672 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1673 CLEAR_PENDING_EXCEPTION;
1712 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1713 return nullptr;
1714 }
1715 #endif // X86 && !ZERO
1716
1717 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1718 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1719 //
1720 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1721 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1722 AdapterHandlerLibrary::create_native_wrapper(method);
1723 } else {
1724 return nullptr;
1725 }
1726 } else {
1727 // If the compiler is shut off due to code cache getting full
1728 // fail out now so blocking compiles dont hang the java thread
1729 if (!should_compile_new_jobs()) {
1730 return nullptr;
1731 }
1732 bool is_blocking = ReplayCompiles ||
1733 !directive->BackgroundCompilationOption ||
1734 (compile_reason == CompileTask::Reason_Precompile) ||
1735 (compile_reason == CompileTask::Reason_PrecompileForPreload);
1736 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, requires_online_compilation, is_blocking, THREAD);
1737 }
1738
1739 // return requested nmethod
1740 // We accept a higher level osr method
1741 if (osr_bci == InvocationEntryBci) {
1742 return method->code();
1743 }
1744 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1745 }
1746
1747
1748 // ------------------------------------------------------------------
1749 // CompileBroker::compilation_is_complete
1750 //
1751 // See if compilation of this method is already complete.
1752 bool CompileBroker::compilation_is_complete(Method* method,
1753 int osr_bci,
1754 int comp_level,
1755 bool online_only,
1756 CompileTask::CompileReason compile_reason) {
1757 if (compile_reason == CompileTask::Reason_Precompile ||
1758 compile_reason == CompileTask::Reason_PrecompileForPreload) {
1759 return false; // FIXME: any restrictions?
1760 }
1761 bool is_osr = (osr_bci != standard_entry_bci);
1762 if (is_osr) {
1763 if (method->is_not_osr_compilable(comp_level)) {
1764 return true;
1765 } else {
1766 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1767 return (result != nullptr);
1768 }
1769 } else {
1770 if (method->is_not_compilable(comp_level)) {
1771 return true;
1772 } else {
1773 nmethod* result = method->code();
1774 if (result == nullptr) {
1775 return false;
1776 }
1777 if (online_only && result->is_scc()) {
1778 return false;
1779 }
1780 bool same_level = (comp_level == result->comp_level());
1781 if (result->has_clinit_barriers()) {
1782 return !same_level; // Allow replace preloaded code with new code of the same level
1783 }
1784 return same_level;
1785 }
1786 }
1787 }
1788
1789
1790 /**
1791 * See if this compilation is already requested.
1792 *
1793 * Implementation note: there is only a single "is in queue" bit
1794 * for each method. This means that the check below is overly
1795 * conservative in the sense that an osr compilation in the queue
1796 * will block a normal compilation from entering the queue (and vice
1797 * versa). This can be remedied by a full queue search to disambiguate
1798 * cases. If it is deemed profitable, this may be done.
1799 */
1800 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1801 return method->queued_for_compilation();
1802 }
1803
1804 // ------------------------------------------------------------------
1864 if (CIStart <= id && id < CIStop) {
1865 return id;
1866 }
1867 }
1868
1869 // Method was not in the appropriate compilation range.
1870 method->set_not_compilable_quietly("Not in requested compile id range");
1871 return 0;
1872 #else
1873 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1874 // only _compilation_id is incremented.
1875 return Atomic::add(&_compilation_id, 1);
1876 #endif
1877 }
1878
1879 // ------------------------------------------------------------------
1880 // CompileBroker::assign_compile_id_unlocked
1881 //
1882 // Public wrapper for assign_compile_id that acquires the needed locks
1883 int CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1884 return assign_compile_id(method, osr_bci);
1885 }
1886
1887 // ------------------------------------------------------------------
1888 // CompileBroker::create_compile_task
1889 //
1890 // Create a CompileTask object representing the current request for
1891 // compilation. Add this task to the queue.
1892 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1893 int compile_id,
1894 const methodHandle& method,
1895 int osr_bci,
1896 int comp_level,
1897 const methodHandle& hot_method,
1898 int hot_count,
1899 SCCEntry* scc_entry,
1900 CompileTask::CompileReason compile_reason,
1901 bool requires_online_compilation,
1902 bool blocking) {
1903 CompileTask* new_task = CompileTask::allocate();
1904 new_task->initialize(compile_id, method, osr_bci, comp_level,
1905 hot_method, hot_count, scc_entry, compile_reason, queue,
1906 requires_online_compilation, blocking);
1907 return new_task;
1908 }
1909
1910 #if INCLUDE_JVMCI
1911 // The number of milliseconds to wait before checking if
1912 // JVMCI compilation has made progress.
1913 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1914
1915 // The number of JVMCI compilation progress checks that must fail
1916 // before unblocking a thread waiting for a blocking compilation.
1917 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1918
1919 /**
1920 * Waits for a JVMCI compiler to complete a given task. This thread
1921 * waits until either the task completes or it sees no JVMCI compilation
1922 * progress for N consecutive milliseconds where N is
1923 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1924 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1925 *
1926 * @return true if this thread needs to free/recycle the task
2027 */
2028 bool CompileBroker::init_compiler_runtime() {
2029 CompilerThread* thread = CompilerThread::current();
2030 AbstractCompiler* comp = thread->compiler();
2031 // Final sanity check - the compiler object must exist
2032 guarantee(comp != nullptr, "Compiler object must exist");
2033
2034 {
2035 // Must switch to native to allocate ci_env
2036 ThreadToNativeFromVM ttn(thread);
2037 ciEnv ci_env((CompileTask*)nullptr);
2038 // Cache Jvmti state
2039 ci_env.cache_jvmti_state();
2040 // Cache DTrace flags
2041 ci_env.cache_dtrace_flags();
2042
2043 // Switch back to VM state to do compiler initialization
2044 ThreadInVMfromNative tv(thread);
2045
2046 // Perform per-thread and global initializations
2047 {
2048 MutexLocker only_one (thread, CompileThread_lock);
2049 SCCache::init_table();
2050 }
2051 comp->initialize();
2052 }
2053
2054 if (comp->is_failed()) {
2055 disable_compilation_forever();
2056 // If compiler initialization failed, no compiler thread that is specific to a
2057 // particular compiler runtime will ever start to compile methods.
2058 shutdown_compiler_runtime(comp, thread);
2059 return false;
2060 }
2061
2062 // C1 specific check
2063 if (comp->is_c1() && (thread->get_buffer_blob() == nullptr)) {
2064 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
2065 return false;
2066 }
2067
2068 return true;
2069 }
2070
2071 void CompileBroker::free_buffer_blob_if_allocated(CompilerThread* thread) {
2072 BufferBlob* blob = thread->get_buffer_blob();
2073 if (blob != nullptr) {
2074 blob->purge();
2075 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2076 CodeCache::free(blob);
2077 }
2078 }
2079
2080 /**
2081 * If C1 and/or C2 initialization failed, we shut down all compilation.
2082 * We do this to keep things simple. This can be changed if it ever turns
2083 * out to be a problem.
2084 */
2085 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
2086 free_buffer_blob_if_allocated(thread);
2087
2088 log_info(compilation)("shutdown_compiler_runtime: " INTPTR_FORMAT, p2i(thread));
2089
2090 if (comp->should_perform_shutdown()) {
2091 // There are two reasons for shutting down the compiler
2092 // 1) compiler runtime initialization failed
2093 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
2094 warning("%s initialization failed. Shutting down all compilers", comp->name());
2095
2096 // Only one thread per compiler runtime object enters here
2097 // Set state to shut down
2098 comp->set_shut_down();
2099
2100 // Delete all queued compilation tasks to make compiler threads exit faster.
2101 if (_c1_compile_queue != nullptr) {
2102 _c1_compile_queue->free_all();
2103 }
2104
2105 if (_c2_compile_queue != nullptr) {
2106 _c2_compile_queue->free_all();
2107 }
2108
2109 if (_c3_compile_queue != nullptr) {
2110 _c3_compile_queue->free_all();
2111 }
2112
2113 // Set flags so that we continue execution with using interpreter only.
2114 UseCompiler = false;
2115 UseInterpreter = true;
2116
2117 // We could delete compiler runtimes also. However, there are references to
2118 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
2119 // fail. This can be done later if necessary.
2120 }
2121 }
2122
2123 /**
2124 * Helper function to create new or reuse old CompileLog.
2125 */
2126 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
2127 if (!LogCompilation) return nullptr;
2128
2129 AbstractCompiler *compiler = ct->compiler();
2130 bool jvmci = JVMCI_ONLY( compiler->is_jvmci() ||) false;
2131 bool c1 = compiler->is_c1();
2132 jobject* compiler_objects = c1 ? _compiler1_objects : (_c3_count == 0 ? _compiler2_objects : (jvmci ? _compiler2_objects : _compiler3_objects));
2133 assert(compiler_objects != nullptr, "must be initialized at this point");
2134 CompileLog** logs = c1 ? _compiler1_logs : (_c3_count == 0 ? _compiler2_logs : (jvmci ? _compiler2_logs : _compiler3_logs));
2135 assert(logs != nullptr, "must be initialized at this point");
2136 int count = c1 ? _c1_count : (_c3_count == 0 ? _c2_count : (jvmci ? _c2_count : _c3_count));
2137
2138 if (ct->queue() == _sc1_compile_queue || ct->queue() == _sc2_compile_queue) {
2139 compiler_objects = _sc_objects;
2140 logs = _sc_logs;
2141 count = _sc_count;
2142 }
2143 // Find Compiler number by its threadObj.
2144 oop compiler_obj = ct->threadObj();
2145 int compiler_number = 0;
2146 bool found = false;
2147 for (; compiler_number < count; compiler_number++) {
2148 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
2149 found = true;
2150 break;
2151 }
2152 }
2153 assert(found, "Compiler must exist at this point");
2154
2155 // Determine pointer for this thread's log.
2156 CompileLog** log_ptr = &logs[compiler_number];
2157
2158 // Return old one if it exists.
2159 CompileLog* log = *log_ptr;
2160 if (log != nullptr) {
2161 ct->init_log(log);
2162 return log;
2200 log->stamp();
2201 log->end_elem();
2202 }
2203
2204 // If compiler thread/runtime initialization fails, exit the compiler thread
2205 if (!init_compiler_runtime()) {
2206 return;
2207 }
2208
2209 thread->start_idle_timer();
2210
2211 // Poll for new compilation tasks as long as the JVM runs. Compilation
2212 // should only be disabled if something went wrong while initializing the
2213 // compiler runtimes. This, in turn, should not happen. The only known case
2214 // when compiler runtime initialization fails is if there is not enough free
2215 // space in the code cache to generate the necessary stubs, etc.
2216 while (!is_compilation_disabled_forever()) {
2217 // We need this HandleMark to avoid leaking VM handles.
2218 HandleMark hm(thread);
2219
2220 CompilationPolicy::recompilation_step(RecompilationWorkUnitSize, thread);
2221
2222 CompileTask* task = queue->get(thread);
2223
2224 if (task == nullptr) {
2225 if (UseDynamicNumberOfCompilerThreads) {
2226 // Access compiler_count under lock to enforce consistency.
2227 MutexLocker only_one(CompileThread_lock);
2228 if (can_remove(thread, true)) {
2229 if (trace_compiler_threads()) {
2230 ResourceMark rm;
2231 stringStream msg;
2232 msg.print("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
2233 thread->name(), thread->idle_time_millis());
2234 print_compiler_threads(msg);
2235 }
2236
2237 // Notify compiler that the compiler thread is about to stop
2238 thread->compiler()->stopping_compiler_thread(thread);
2239
2240 free_buffer_blob_if_allocated(thread);
2241 return; // Stop this thread.
2242 }
2243 }
2244 } else {
2245 // Assign the task to the current thread. Mark this compilation
2246 // thread as active for the profiler.
2247 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
2248 // occurs after fetching the compile task off the queue.
2249 CompileTaskWrapper ctw(task);
2250 methodHandle method(thread, task->method());
2251
2252 // Never compile a method if breakpoints are present in it
2253 if (method()->number_of_breakpoints() == 0) {
2254 // Compile the method.
2255 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
2256 invoke_compiler_on_method(task);
2257 thread->start_idle_timer();
2258 } else {
2259 // After compilation is disabled, remove remaining methods from queue
2260 method->clear_queued_for_compilation();
2261 method->set_pending_queue_processed(false);
2262 task->set_failure_reason("compilation is disabled");
2263 }
2264 } else {
2265 task->set_failure_reason("breakpoints are present");
2266 }
2267
2268 if (UseDynamicNumberOfCompilerThreads) {
2269 possibly_add_compiler_threads(thread);
2270 assert(!thread->has_pending_exception(), "should have been handled");
2271 }
2272 }
2273 }
2274
2275 // Shut down compiler runtime
2276 shutdown_compiler_runtime(thread->compiler(), thread);
2277 }
2278
2279 // ------------------------------------------------------------------
2280 // CompileBroker::init_compiler_thread_log
2281 //
2450 if (directive->PrintCompilationOption) {
2451 ResourceMark rm;
2452 task->print_tty();
2453 }
2454
2455 CompilerThread* thread = CompilerThread::current();
2456 ResourceMark rm(thread);
2457
2458 if (CompilationLog::log() != nullptr) {
2459 CompilationLog::log()->log_compile(thread, task);
2460 }
2461
2462 // Common flags.
2463 int compile_id = task->compile_id();
2464 int osr_bci = task->osr_bci();
2465 bool is_osr = (osr_bci != standard_entry_bci);
2466 bool should_log = (thread->log() != nullptr);
2467 bool should_break = false;
2468 const int task_level = task->comp_level();
2469 AbstractCompiler* comp = task->compiler();
2470 CompileTrainingData* tdata = task->training_data();
2471 assert(tdata == nullptr || TrainingData::need_data() ||
2472 CDSConfig::is_dumping_preimage_static_archive(), ""); // FIXME: MetaspaceShared::preload_and_dump() messes with RecordTraining flag
2473 {
2474 // create the handle inside it's own block so it can't
2475 // accidentally be referenced once the thread transitions to
2476 // native. The NoHandleMark before the transition should catch
2477 // any cases where this occurs in the future.
2478 methodHandle method(thread, task->method());
2479
2480 assert(!method->is_native(), "no longer compile natives");
2481
2482 // Update compile information when using perfdata.
2483 if (UsePerfData) {
2484 update_compile_perf_data(thread, method, is_osr);
2485 }
2486
2487 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2488 }
2489
2490 if (tdata != nullptr) {
2491 tdata->record_compilation_start(task);
2492 }
2493
2494 should_break = directive->BreakAtCompileOption || task->check_break_at_flags();
2495 if (should_log && !directive->LogOption) {
2496 should_log = false;
2497 }
2498
2499 // Allocate a new set of JNI handles.
2500 JNIHandleMark jhm(thread);
2501 Method* target_handle = task->method();
2502 int compilable = ciEnv::MethodCompilable;
2503 const char* failure_reason = nullptr;
2504 bool failure_reason_on_C_heap = false;
2505 const char* retry_message = nullptr;
2506
2507 #if INCLUDE_JVMCI
2508 if (UseJVMCICompiler && comp != nullptr && comp->is_jvmci()) {
2509 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2510
2511 TraceTime t1("compilation", &time);
2512 EventCompilation event;
2513 JVMCICompileState compile_state(task, jvmci);
2580 }
2581 assert(thread->env() == &ci_env, "set by ci_env");
2582 // The thread-env() field is cleared in ~CompileTaskWrapper.
2583
2584 // Cache Jvmti state
2585 bool method_is_old = ci_env.cache_jvmti_state();
2586
2587 // Skip redefined methods
2588 if (method_is_old) {
2589 ci_env.record_method_not_compilable("redefined method", true);
2590 }
2591
2592 // Cache DTrace flags
2593 ci_env.cache_dtrace_flags();
2594
2595 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2596
2597 TraceTime t1("compilation", &time);
2598 EventCompilation event;
2599
2600 bool install_code = true;
2601 if (comp == nullptr) {
2602 ci_env.record_method_not_compilable("no compiler");
2603 } else if (!ci_env.failing()) {
2604 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2605 whitebox_lock_compilation();
2606 }
2607 if (StoreCachedCode && task->is_precompiled()) {
2608 install_code = false; // not suitable in the current context
2609 }
2610 comp->compile_method(&ci_env, target, osr_bci, install_code, directive);
2611
2612 /* Repeat compilation without installing code for profiling purposes */
2613 int repeat_compilation_count = directive->RepeatCompilationOption;
2614 while (repeat_compilation_count > 0) {
2615 ResourceMark rm(thread);
2616 task->print_ul("NO CODE INSTALLED");
2617 comp->compile_method(&ci_env, target, osr_bci, false, directive);
2618 repeat_compilation_count--;
2619 }
2620 }
2621
2622 DirectivesStack::release(directive);
2623
2624 if (!ci_env.failing() && !task->is_success() && install_code) {
2625 assert(ci_env.failure_reason() != nullptr, "expect failure reason");
2626 assert(false, "compiler should always document failure: %s", ci_env.failure_reason());
2627 // The compiler elected, without comment, not to register a result.
2628 // Do not attempt further compilations of this method.
2629 ci_env.record_method_not_compilable("compile failed");
2630 }
2631
2632 // Copy this bit to the enclosing block:
2633 compilable = ci_env.compilable();
2634
2635 if (ci_env.failing()) {
2636 // Duplicate the failure reason string, so that it outlives ciEnv
2637 failure_reason = os::strdup(ci_env.failure_reason(), mtCompiler);
2638 failure_reason_on_C_heap = true;
2639 retry_message = ci_env.retry_message();
2640 ci_env.report_failure(failure_reason);
2641 }
2642
2643 if (ci_env.failing()) {
2644 handle_compile_error(thread, task, &ci_env, compilable, failure_reason);
2645 }
2646 if (event.should_commit()) {
2647 post_compilation_event(event, task);
2648 }
2649 }
2650
2651 if (failure_reason != nullptr) {
2652 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2653 if (CompilationLog::log() != nullptr) {
2654 CompilationLog::log()->log_failure(thread, task, failure_reason, retry_message);
2655 }
2656 if (PrintCompilation) {
2657 FormatBufferResource msg = retry_message != nullptr ?
2658 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2659 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2660 task->print(tty, msg);
2661 }
2662 }
2663
2664 if (tdata != nullptr) {
2665 tdata->record_compilation_end(task);
2666 }
2667
2668 methodHandle method(thread, task->method());
2669
2670 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2671
2672 collect_statistics(thread, time, task);
2673
2674 if (PrintCompilation && PrintCompilation2) {
2675 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2676 tty->print("%4d ", compile_id); // print compilation number
2677 tty->print("%s ", (is_osr ? "%" : (task->is_scc() ? "A" : " ")));
2678 if (task->is_success()) {
2679 tty->print("size: %d(%d) ", task->nm_total_size(), task->nm_insts_size());
2680 }
2681 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2682 }
2683
2684 Log(compilation, codecache) log;
2685 if (log.is_debug()) {
2686 LogStream ls(log.debug());
2687 codecache_print(&ls, /* detailed= */ false);
2688 }
2689 if (PrintCodeCacheOnCompilation) {
2690 codecache_print(/* detailed= */ false);
2691 }
2692 // Disable compilation, if required.
2693 switch (compilable) {
2694 case ciEnv::MethodCompilable_never:
2695 if (is_osr)
2696 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2697 else
2698 method->set_not_compilable_quietly("MethodCompilable_never");
2699 break;
2700 case ciEnv::MethodCompilable_not_at_tier:
2701 if (is_osr)
2702 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2703 else
2704 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2705 break;
2706 }
2707
2708 // Note that the queued_for_compilation bits are cleared without
2709 // protection of a mutex. [They were set by the requester thread,
2710 // when adding the task to the compile queue -- at which time the
2711 // compile queue lock was held. Subsequently, we acquired the compile
2712 // queue lock to get this task off the compile queue; thus (to belabour
2713 // the point somewhat) our clearing of the bits must be occurring
2714 // only after the setting of the bits. See also 14012000 above.
2715 method->clear_queued_for_compilation();
2716 method->set_pending_queue_processed(false);
2717 }
2718
2719 /**
2720 * The CodeCache is full. Print warning and disable compilation.
2721 * Schedule code cache cleaning so compilation can continue later.
2722 * This function needs to be called only from CodeCache::allocate(),
2723 * since we currently handle a full code cache uniformly.
2724 */
2725 void CompileBroker::handle_full_code_cache(CodeBlobType code_blob_type) {
2726 UseInterpreter = true;
2727 if (UseCompiler || AlwaysCompileLoopMethods ) {
2728 if (xtty != nullptr) {
2729 stringStream s;
2730 // Dump code cache state into a buffer before locking the tty,
2731 // because log_state() will use locks causing lock conflicts.
2732 CodeCache::log_state(&s);
2733 // Lock to prevent tearing
2734 ttyLocker ttyl;
2735 xtty->begin_elem("code_cache_full");
2736 xtty->print("%s", s.freeze());
2809 // CompileBroker::collect_statistics
2810 //
2811 // Collect statistics about the compilation.
2812
2813 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2814 bool success = task->is_success();
2815 methodHandle method (thread, task->method());
2816 int compile_id = task->compile_id();
2817 bool is_osr = (task->osr_bci() != standard_entry_bci);
2818 const int comp_level = task->comp_level();
2819 CompilerCounters* counters = thread->counters();
2820
2821 MutexLocker locker(CompileStatistics_lock);
2822
2823 // _perf variables are production performance counters which are
2824 // updated regardless of the setting of the CITime and CITimeEach flags
2825 //
2826
2827 // account all time, including bailouts and failures in this counter;
2828 // C1 and C2 counters are counting both successful and unsuccessful compiles
2829 _t_total_compilation.add(&time);
2830
2831 if (!success) {
2832 _total_bailout_count++;
2833 if (UsePerfData) {
2834 _perf_last_failed_method->set_value(counters->current_method());
2835 _perf_last_failed_type->set_value(counters->compile_type());
2836 _perf_total_bailout_count->inc();
2837 }
2838 _t_bailedout_compilation.add(&time);
2839
2840 if (CITime || log_is_enabled(Info, init)) {
2841 CompilerStatistics* stats = nullptr;
2842 if (task->is_scc()) {
2843 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2844 stats = &_scc_stats_per_level[level];
2845 } else {
2846 stats = &_stats_per_level[comp_level-1];
2847 }
2848 stats->_bailout.update(time, 0);
2849 }
2850 } else if (!task->is_success()) {
2851 if (UsePerfData) {
2852 _perf_last_invalidated_method->set_value(counters->current_method());
2853 _perf_last_invalidated_type->set_value(counters->compile_type());
2854 _perf_total_invalidated_count->inc();
2855 }
2856 _total_invalidated_count++;
2857 _t_invalidated_compilation.add(&time);
2858
2859 if (CITime || log_is_enabled(Info, init)) {
2860 CompilerStatistics* stats = nullptr;
2861 if (task->is_scc()) {
2862 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2863 stats = &_scc_stats_per_level[level];
2864 } else {
2865 stats = &_stats_per_level[comp_level-1];
2866 }
2867 stats->_invalidated.update(time, 0);
2868 }
2869 } else {
2870 // Compilation succeeded
2871
2872 // update compilation ticks - used by the implementation of
2873 // java.lang.management.CompilationMXBean
2874 _perf_total_compilation->inc(time.ticks());
2875 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2876
2877 if (CITime || log_is_enabled(Info, init)) {
2878 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2879 if (is_osr) {
2880 _t_osr_compilation.add(&time);
2881 _sum_osr_bytes_compiled += bytes_compiled;
2882 } else {
2883 _t_standard_compilation.add(&time);
2884 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2885 }
2886
2887 // Collect statistic per compilation level
2888 if (task->is_scc()) {
2889 _scc_stats._standard.update(time, bytes_compiled);
2890 _scc_stats._nmethods_size += task->nm_total_size();
2891 _scc_stats._nmethods_code_size += task->nm_insts_size();
2892 int level = task->preload() ? CompLevel_full_optimization : (comp_level - 1);
2893 CompilerStatistics* stats = &_scc_stats_per_level[level];
2894 stats->_standard.update(time, bytes_compiled);
2895 stats->_nmethods_size += task->nm_total_size();
2896 stats->_nmethods_code_size += task->nm_insts_size();
2897 } else if (comp_level > CompLevel_none && comp_level <= CompLevel_full_optimization) {
2898 CompilerStatistics* stats = &_stats_per_level[comp_level-1];
2899 if (is_osr) {
2900 stats->_osr.update(time, bytes_compiled);
2901 } else {
2902 stats->_standard.update(time, bytes_compiled);
2903 }
2904 stats->_nmethods_size += task->nm_total_size();
2905 stats->_nmethods_code_size += task->nm_insts_size();
2906 } else {
2907 assert(false, "CompilerStatistics object does not exist for compilation level %d", comp_level);
2908 }
2909
2910 // Collect statistic per compiler
2911 AbstractCompiler* comp = task->compiler();
2912 if (comp && !task->is_scc()) {
2913 CompilerStatistics* stats = comp->stats();
2914 if (is_osr) {
2915 stats->_osr.update(time, bytes_compiled);
2916 } else {
2917 stats->_standard.update(time, bytes_compiled);
2918 }
2919 stats->_nmethods_size += task->nm_total_size();
2920 stats->_nmethods_code_size += task->nm_insts_size();
2921 } else if (!task->is_scc()) { // if (!comp)
2922 assert(false, "Compiler object must exist");
2923 }
2924 }
2925
2926 if (UsePerfData) {
2927 // save the name of the last method compiled
2928 _perf_last_method->set_value(counters->current_method());
2929 _perf_last_compile_type->set_value(counters->compile_type());
2930 _perf_last_compile_size->set_value(method->code_size() +
2931 task->num_inlined_bytecodes());
2932 if (is_osr) {
2933 _perf_osr_compilation->inc(time.ticks());
2934 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2935 } else {
2936 _perf_standard_compilation->inc(time.ticks());
2937 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2938 }
2939 }
2940
2941 if (CITimeEach) {
2964 _total_standard_compile_count++;
2965 }
2966 }
2967 // set the current method for the thread to null
2968 if (UsePerfData) counters->set_current_method("");
2969 }
2970
2971 const char* CompileBroker::compiler_name(int comp_level) {
2972 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2973 if (comp == nullptr) {
2974 return "no compiler";
2975 } else {
2976 return (comp->name());
2977 }
2978 }
2979
2980 jlong CompileBroker::total_compilation_ticks() {
2981 return _perf_total_compilation != nullptr ? _perf_total_compilation->get_value() : 0;
2982 }
2983
2984 void CompileBroker::log_not_entrant(nmethod* nm) {
2985 _total_not_entrant_count++;
2986 if (CITime || log_is_enabled(Info, init)) {
2987 CompilerStatistics* stats = nullptr;
2988 int level = nm->comp_level();
2989 if (nm->is_scc()) {
2990 if (nm->preloaded()) {
2991 assert(level == CompLevel_full_optimization, "%d", level);
2992 level = CompLevel_full_optimization + 1;
2993 }
2994 stats = &_scc_stats_per_level[level - 1];
2995 } else {
2996 stats = &_stats_per_level[level - 1];
2997 }
2998 stats->_made_not_entrant._count++;
2999 }
3000 }
3001
3002 void CompileBroker::print_times(const char* name, CompilerStatistics* stats) {
3003 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}",
3004 name, stats->bytes_per_second(),
3005 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
3006 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
3007 stats->_nmethods_size, stats->_nmethods_code_size);
3008 }
3009
3010 static void print_helper(outputStream* st, const char* name, CompilerStatistics::Data data, bool print_time = true) {
3011 if (data._count > 0) {
3012 st->print("; %s: %4u methods", name, data._count);
3013 if (print_time) {
3014 st->print(" (in %.3fs)", data._time.seconds());
3015 }
3016 }
3017 }
3018
3019 static void print_tier_helper(outputStream* st, const char* prefix, int tier, CompilerStatistics* stats) {
3020 st->print(" %s%d: %5u methods", prefix, tier, stats->_standard._count);
3021 if (stats->_standard._count > 0) {
3022 st->print(" (in %.3fs)", stats->_standard._time.seconds());
3023 }
3024 print_helper(st, "osr", stats->_osr);
3025 print_helper(st, "bailout", stats->_bailout);
3026 print_helper(st, "invalid", stats->_invalidated);
3027 print_helper(st, "not_entrant", stats->_made_not_entrant, false);
3028 st->cr();
3029 }
3030
3031 static void print_queue_info(outputStream* st, CompileQueue* queue) {
3032 if (queue != nullptr) {
3033 MutexLocker ml(queue->lock());
3034
3035 uint total_cnt = 0;
3036 uint active_cnt = 0;
3037 for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3038 guarantee(jt != nullptr, "");
3039 if (jt->is_Compiler_thread()) {
3040 CompilerThread* ct = (CompilerThread*)jt;
3041
3042 guarantee(ct != nullptr, "");
3043 if (ct->queue() == queue) {
3044 ++total_cnt;
3045 CompileTask* task = ct->task();
3046 if (task != nullptr) {
3047 ++active_cnt;
3048 }
3049 }
3050 }
3051 }
3052
3053 st->print(" %s (%d active / %d total threads): %u tasks",
3054 queue->name(), active_cnt, total_cnt, queue->size());
3055 if (queue->size() > 0) {
3056 uint counts[] = {0, 0, 0, 0, 0}; // T1 ... T5
3057 for (CompileTask* task = queue->first(); task != nullptr; task = task->next()) {
3058 int tier = task->comp_level();
3059 if (task->is_scc() && task->preload()) {
3060 assert(tier == CompLevel_full_optimization, "%d", tier);
3061 tier = CompLevel_full_optimization + 1;
3062 }
3063 counts[tier-1]++;
3064 }
3065 st->print(":");
3066 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3067 uint cnt = counts[tier-1];
3068 if (cnt > 0) {
3069 st->print(" T%d: %u tasks;", tier, cnt);
3070 }
3071 }
3072 }
3073 st->cr();
3074
3075 // for (JavaThread* jt : *ThreadsSMRSupport::get_java_thread_list()) {
3076 // guarantee(jt != nullptr, "");
3077 // if (jt->is_Compiler_thread()) {
3078 // CompilerThread* ct = (CompilerThread*)jt;
3079 //
3080 // guarantee(ct != nullptr, "");
3081 // if (ct->queue() == queue) {
3082 // ResourceMark rm;
3083 // CompileTask* task = ct->task();
3084 // st->print(" %s: ", ct->name_raw());
3085 // if (task != nullptr) {
3086 // task->print(st, nullptr, true /*short_form*/, false /*cr*/);
3087 // }
3088 // st->cr();
3089 // }
3090 // }
3091 // }
3092 }
3093 }
3094 void CompileBroker::print_statistics_on(outputStream* st) {
3095 st->print_cr(" Total: %u methods; %u bailouts, %u invalidated, %u non_entrant",
3096 _total_compile_count, _total_bailout_count, _total_invalidated_count, _total_not_entrant_count);
3097 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3098 print_tier_helper(st, "Tier", tier, &_stats_per_level[tier-1]);
3099 }
3100 st->cr();
3101
3102 if (LoadCachedCode || StoreCachedCode) {
3103 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3104 if (tier != CompLevel_full_profile) {
3105 print_tier_helper(st, "SC T", tier, &_scc_stats_per_level[tier - 1]);
3106 }
3107 }
3108 st->cr();
3109 }
3110
3111 print_queue_info(st, _c1_compile_queue);
3112 print_queue_info(st, _c2_compile_queue);
3113 print_queue_info(st, _c3_compile_queue);
3114 print_queue_info(st, _sc1_compile_queue);
3115 print_queue_info(st, _sc2_compile_queue);
3116 }
3117
3118 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
3119 if (per_compiler) {
3120 if (aggregate) {
3121 tty->cr();
3122 tty->print_cr("[%dms] Individual compiler times (for compiled methods only)", (int)tty->time_stamp().milliseconds());
3123 tty->print_cr("------------------------------------------------");
3124 tty->cr();
3125 }
3126 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
3127 AbstractCompiler* comp = _compilers[i];
3128 if (comp != nullptr) {
3129 print_times(comp->name(), comp->stats());
3130 }
3131 }
3132 if (_scc_stats._standard._count > 0) {
3133 print_times("SC", &_scc_stats);
3134 }
3135 if (aggregate) {
3136 tty->cr();
3137 tty->print_cr("Individual compilation Tier times (for compiled methods only)");
3138 tty->print_cr("------------------------------------------------");
3139 tty->cr();
3140 }
3141 char tier_name[256];
3142 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level(); tier++) {
3143 CompilerStatistics* stats = &_stats_per_level[tier-1];
3144 os::snprintf_checked(tier_name, sizeof(tier_name), "Tier%d", tier);
3145 print_times(tier_name, stats);
3146 }
3147 for (int tier = CompLevel_simple; tier <= CompilationPolicy::highest_compile_level() + 1; tier++) {
3148 CompilerStatistics* stats = &_scc_stats_per_level[tier-1];
3149 if (stats->_standard._bytes > 0) {
3150 os::snprintf_checked(tier_name, sizeof(tier_name), "SC T%d", tier);
3151 print_times(tier_name, stats);
3152 }
3153 }
3154 }
3155
3156 if (!aggregate) {
3157 return;
3158 }
3159
3160 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
3161 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
3162 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
3163
3164 uint standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
3165 uint osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
3166
3167 uint standard_compile_count = CompileBroker::_total_standard_compile_count;
3168 uint osr_compile_count = CompileBroker::_total_osr_compile_count;
3169 uint total_compile_count = CompileBroker::_total_compile_count;
3170 uint total_bailout_count = CompileBroker::_total_bailout_count;
3171 uint total_invalidated_count = CompileBroker::_total_invalidated_count;
3172
3173 uint nmethods_code_size = CompileBroker::_sum_nmethod_code_size;
3175
3176 tty->cr();
3177 tty->print_cr("Accumulated compiler times");
3178 tty->print_cr("----------------------------------------------------------");
3179 //0000000000111111111122222222223333333333444444444455555555556666666666
3180 //0123456789012345678901234567890123456789012345678901234567890123456789
3181 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
3182 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
3183 standard_compilation.seconds(),
3184 standard_compile_count == 0 ? 0.0 : standard_compilation.seconds() / standard_compile_count);
3185 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
3186 CompileBroker::_t_bailedout_compilation.seconds(),
3187 total_bailout_count == 0 ? 0.0 : CompileBroker::_t_bailedout_compilation.seconds() / total_bailout_count);
3188 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
3189 osr_compilation.seconds(),
3190 osr_compile_count == 0 ? 0.0 : osr_compilation.seconds() / osr_compile_count);
3191 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
3192 CompileBroker::_t_invalidated_compilation.seconds(),
3193 total_invalidated_count == 0 ? 0.0 : CompileBroker::_t_invalidated_compilation.seconds() / total_invalidated_count);
3194
3195 if (StoreCachedCode || LoadCachedCode) { // Check flags because SC cache could be closed already
3196 tty->cr();
3197 SCCache::print_timers_on(tty);
3198 }
3199 AbstractCompiler *comp = compiler(CompLevel_simple);
3200 if (comp != nullptr) {
3201 tty->cr();
3202 comp->print_timers();
3203 }
3204 comp = compiler(CompLevel_full_optimization);
3205 if (comp != nullptr) {
3206 tty->cr();
3207 comp->print_timers();
3208 }
3209 comp = _compilers[2];
3210 if (comp != nullptr) {
3211 tty->cr();
3212 comp->print_timers();
3213 }
3214 #if INCLUDE_JVMCI
3215 if (EnableJVMCI) {
3216 JVMCICompiler *jvmci_comp = JVMCICompiler::instance(false, JavaThread::current_or_null());
3217 if (jvmci_comp != nullptr && jvmci_comp != comp) {
3218 tty->cr();
3219 jvmci_comp->print_timers();
3220 }
3221 }
3222 #endif
3223
3224 tty->cr();
3225 tty->print_cr(" Total compiled methods : %8u methods", total_compile_count);
3226 tty->print_cr(" Standard compilation : %8u methods", standard_compile_count);
3227 tty->print_cr(" On stack replacement : %8u methods", osr_compile_count);
3228 uint tcb = osr_bytes_compiled + standard_bytes_compiled;
3229 tty->print_cr(" Total compiled bytecodes : %8u bytes", tcb);
3230 tty->print_cr(" Standard compilation : %8u bytes", standard_bytes_compiled);
3231 tty->print_cr(" On stack replacement : %8u bytes", osr_bytes_compiled);
3232 double tcs = total_compilation.seconds();
3233 uint bps = tcs == 0.0 ? 0 : (uint)(tcb / tcs);
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