1 /*
2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/codeHeapState.hpp"
32 #include "code/dependencyContext.hpp"
33 #include "compiler/compilationPolicy.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "compiler/compileLog.hpp"
36 #include "compiler/compilerOracle.hpp"
37 #include "compiler/directivesParser.hpp"
38 #include "interpreter/linkResolver.hpp"
39 #include "jfr/jfrEvents.hpp"
40 #include "logging/log.hpp"
41 #include "logging/logStream.hpp"
42 #include "memory/allocation.inline.hpp"
43 #include "memory/resourceArea.hpp"
44 #include "memory/universe.hpp"
45 #include "oops/methodData.hpp"
46 #include "oops/method.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "prims/nativeLookup.hpp"
49 #include "prims/whitebox.hpp"
50 #include "runtime/arguments.hpp"
51 #include "runtime/atomic.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.inline.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/jniHandles.inline.hpp"
57 #include "runtime/os.hpp"
58 #include "runtime/safepointVerifiers.hpp"
59 #include "runtime/sharedRuntime.hpp"
60 #include "runtime/sweeper.hpp"
61 #include "runtime/timerTrace.hpp"
62 #include "runtime/vframe.inline.hpp"
63 #include "utilities/debug.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/formatBuffer.hpp"
67 #include "utilities/macros.hpp"
68 #ifdef COMPILER1
69 #include "c1/c1_Compiler.hpp"
70 #endif
71 #if INCLUDE_JVMCI
72 #include "jvmci/jvmciEnv.hpp"
73 #include "jvmci/jvmciRuntime.hpp"
74 #endif
75 #ifdef COMPILER2
76 #include "opto/c2compiler.hpp"
77 #endif
78
79 #ifdef DTRACE_ENABLED
80
81 // Only bother with this argument setup if dtrace is available
82
83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
84 { \
85 Symbol* klass_name = (method)->klass_name(); \
86 Symbol* name = (method)->name(); \
87 Symbol* signature = (method)->signature(); \
88 HOTSPOT_METHOD_COMPILE_BEGIN( \
89 (char *) comp_name, strlen(comp_name), \
90 (char *) klass_name->bytes(), klass_name->utf8_length(), \
91 (char *) name->bytes(), name->utf8_length(), \
92 (char *) signature->bytes(), signature->utf8_length()); \
93 }
94
95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
96 { \
97 Symbol* klass_name = (method)->klass_name(); \
98 Symbol* name = (method)->name(); \
99 Symbol* signature = (method)->signature(); \
100 HOTSPOT_METHOD_COMPILE_END( \
101 (char *) comp_name, strlen(comp_name), \
102 (char *) klass_name->bytes(), klass_name->utf8_length(), \
103 (char *) name->bytes(), name->utf8_length(), \
104 (char *) signature->bytes(), signature->utf8_length(), (success)); \
105 }
106
107 #else // ndef DTRACE_ENABLED
108
109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
111
112 #endif // ndef DTRACE_ENABLED
113
114 bool CompileBroker::_initialized = false;
115 volatile bool CompileBroker::_should_block = false;
116 volatile int CompileBroker::_print_compilation_warning = 0;
117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
118
119 // The installed compiler(s)
120 AbstractCompiler* CompileBroker::_compilers[2];
121
122 // The maximum numbers of compiler threads to be determined during startup.
123 int CompileBroker::_c1_count = 0;
124 int CompileBroker::_c2_count = 0;
125
126 // An array of compiler names as Java String objects
127 jobject* CompileBroker::_compiler1_objects = NULL;
128 jobject* CompileBroker::_compiler2_objects = NULL;
129
130 CompileLog** CompileBroker::_compiler1_logs = NULL;
131 CompileLog** CompileBroker::_compiler2_logs = NULL;
132
133 // These counters are used to assign an unique ID to each compilation.
134 volatile jint CompileBroker::_compilation_id = 0;
135 volatile jint CompileBroker::_osr_compilation_id = 0;
136
137 // Performance counters
138 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
139 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
140 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
141
142 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
143 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
144 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
145 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
146 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
147
148 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
149 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
150 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
151 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
152
153 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
154 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
155 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
156 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
157 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
158 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
159 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
160
161 // Timers and counters for generating statistics
162 elapsedTimer CompileBroker::_t_total_compilation;
163 elapsedTimer CompileBroker::_t_osr_compilation;
164 elapsedTimer CompileBroker::_t_standard_compilation;
165 elapsedTimer CompileBroker::_t_invalidated_compilation;
166 elapsedTimer CompileBroker::_t_bailedout_compilation;
167
168 int CompileBroker::_total_bailout_count = 0;
169 int CompileBroker::_total_invalidated_count = 0;
170 int CompileBroker::_total_compile_count = 0;
171 int CompileBroker::_total_osr_compile_count = 0;
172 int CompileBroker::_total_standard_compile_count = 0;
173 int CompileBroker::_total_compiler_stopped_count = 0;
174 int CompileBroker::_total_compiler_restarted_count = 0;
175
176 int CompileBroker::_sum_osr_bytes_compiled = 0;
177 int CompileBroker::_sum_standard_bytes_compiled = 0;
178 int CompileBroker::_sum_nmethod_size = 0;
179 int CompileBroker::_sum_nmethod_code_size = 0;
180
181 long CompileBroker::_peak_compilation_time = 0;
182
183 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
184 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
185
186
187
188 class CompilationLog : public StringEventLog {
189 public:
190 CompilationLog() : StringEventLog("Compilation events", "jit") {
191 }
192
193 void log_compile(JavaThread* thread, CompileTask* task) {
194 StringLogMessage lm;
195 stringStream sstr(lm.buffer(), lm.size());
196 // msg.time_stamp().update_to(tty->time_stamp().ticks());
197 task->print(&sstr, NULL, true, false);
198 log(thread, "%s", (const char*)lm);
199 }
200
201 void log_nmethod(JavaThread* thread, nmethod* nm) {
202 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
203 nm->compile_id(), nm->is_osr_method() ? "%" : "",
204 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
205 }
206
207 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
208 StringLogMessage lm;
209 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
210 if (retry_message != NULL) {
211 lm.append(" (%s)", retry_message);
212 }
213 lm.print("\n");
214 log(thread, "%s", (const char*)lm);
215 }
216
217 void log_metaspace_failure(const char* reason) {
218 ResourceMark rm;
219 StringLogMessage lm;
220 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
221 lm.print("\n");
222 log(JavaThread::current(), "%s", (const char*)lm);
223 }
224 };
225
226 static CompilationLog* _compilation_log = NULL;
227
228 bool compileBroker_init() {
229 if (LogEvents) {
230 _compilation_log = new CompilationLog();
231 }
232
233 // init directives stack, adding default directive
234 DirectivesStack::init();
235
236 if (DirectivesParser::has_file()) {
237 return DirectivesParser::parse_from_flag();
238 } else if (CompilerDirectivesPrint) {
239 // Print default directive even when no other was added
240 DirectivesStack::print(tty);
241 }
242
243 return true;
244 }
245
246 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
247 CompilerThread* thread = CompilerThread::current();
248 thread->set_task(task);
249 #if INCLUDE_JVMCI
250 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
251 task->set_jvmci_compiler_thread(thread);
252 }
253 #endif
254 CompileLog* log = thread->log();
255 if (log != NULL && !task->is_unloaded()) task->log_task_start(log);
256 }
257
258 CompileTaskWrapper::~CompileTaskWrapper() {
259 CompilerThread* thread = CompilerThread::current();
260 CompileTask* task = thread->task();
261 CompileLog* log = thread->log();
262 if (log != NULL && !task->is_unloaded()) task->log_task_done(log);
263 thread->set_task(NULL);
264 task->set_code_handle(NULL);
265 thread->set_env(NULL);
266 if (task->is_blocking()) {
267 bool free_task = false;
268 {
269 MutexLocker notifier(task->lock(), thread);
270 task->mark_complete();
271 #if INCLUDE_JVMCI
272 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
273 if (!task->has_waiter()) {
274 // The waiting thread timed out and thus did not free the task.
275 free_task = true;
276 }
277 task->set_jvmci_compiler_thread(NULL);
278 }
279 #endif
280 if (!free_task) {
281 // Notify the waiting thread that the compilation has completed
282 // so that it can free the task.
283 task->lock()->notify_all();
284 }
285 }
286 if (free_task) {
287 // The task can only be freed once the task lock is released.
288 CompileTask::free(task);
289 }
290 } else {
291 task->mark_complete();
292
293 // By convention, the compiling thread is responsible for
294 // recycling a non-blocking CompileTask.
295 CompileTask::free(task);
296 }
297 }
298
299 /**
300 * Check if a CompilerThread can be removed and update count if requested.
301 */
302 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
303 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
304 if (!ReduceNumberOfCompilerThreads) return false;
305
306 AbstractCompiler *compiler = ct->compiler();
307 int compiler_count = compiler->num_compiler_threads();
308 bool c1 = compiler->is_c1();
309
310 // Keep at least 1 compiler thread of each type.
311 if (compiler_count < 2) return false;
312
313 // Keep thread alive for at least some time.
314 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
315
316 #if INCLUDE_JVMCI
317 if (compiler->is_jvmci()) {
318 // Handles for JVMCI thread objects may get released concurrently.
319 if (do_it) {
320 assert(CompileThread_lock->owner() == ct, "must be holding lock");
321 } else {
322 // Skip check if it's the last thread and let caller check again.
323 return true;
324 }
325 }
326 #endif
327
328 // We only allow the last compiler thread of each type to get removed.
329 jobject last_compiler = c1 ? compiler1_object(compiler_count - 1)
330 : compiler2_object(compiler_count - 1);
331 if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) {
332 if (do_it) {
333 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
334 compiler->set_num_compiler_threads(compiler_count - 1);
335 #if INCLUDE_JVMCI
336 if (compiler->is_jvmci()) {
337 // Old j.l.Thread object can die when no longer referenced elsewhere.
338 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
339 _compiler2_objects[compiler_count - 1] = NULL;
340 }
341 #endif
342 }
343 return true;
344 }
345 return false;
346 }
347
348 /**
349 * Add a CompileTask to a CompileQueue.
350 */
351 void CompileQueue::add(CompileTask* task) {
352 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
353
354 task->set_next(NULL);
355 task->set_prev(NULL);
356
357 if (_last == NULL) {
358 // The compile queue is empty.
359 assert(_first == NULL, "queue is empty");
360 _first = task;
361 _last = task;
362 } else {
363 // Append the task to the queue.
364 assert(_last->next() == NULL, "not last");
365 _last->set_next(task);
366 task->set_prev(_last);
367 _last = task;
368 }
369 ++_size;
370
371 // Mark the method as being in the compile queue.
372 task->method()->set_queued_for_compilation();
373
374 if (CIPrintCompileQueue) {
375 print_tty();
376 }
377
378 if (LogCompilation && xtty != NULL) {
379 task->log_task_queued();
380 }
381
382 // Notify CompilerThreads that a task is available.
383 MethodCompileQueue_lock->notify_all();
384 }
385
386 /**
387 * Empties compilation queue by putting all compilation tasks onto
388 * a freelist. Furthermore, the method wakes up all threads that are
389 * waiting on a compilation task to finish. This can happen if background
390 * compilation is disabled.
391 */
392 void CompileQueue::free_all() {
393 MutexLocker mu(MethodCompileQueue_lock);
394 CompileTask* next = _first;
395
396 // Iterate over all tasks in the compile queue
397 while (next != NULL) {
398 CompileTask* current = next;
399 next = current->next();
400 {
401 // Wake up thread that blocks on the compile task.
402 MutexLocker ct_lock(current->lock());
403 current->lock()->notify();
404 }
405 // Put the task back on the freelist.
406 CompileTask::free(current);
407 }
408 _first = NULL;
409
410 // Wake up all threads that block on the queue.
411 MethodCompileQueue_lock->notify_all();
412 }
413
414 /**
415 * Get the next CompileTask from a CompileQueue
416 */
417 CompileTask* CompileQueue::get() {
418 // save methods from RedefineClasses across safepoint
419 // across MethodCompileQueue_lock below.
420 methodHandle save_method;
421 methodHandle save_hot_method;
422
423 MonitorLocker locker(MethodCompileQueue_lock);
424 // If _first is NULL we have no more compile jobs. There are two reasons for
425 // having no compile jobs: First, we compiled everything we wanted. Second,
426 // we ran out of code cache so compilation has been disabled. In the latter
427 // case we perform code cache sweeps to free memory such that we can re-enable
428 // compilation.
429 while (_first == NULL) {
430 // Exit loop if compilation is disabled forever
431 if (CompileBroker::is_compilation_disabled_forever()) {
432 return NULL;
433 }
434
435 // If there are no compilation tasks and we can compile new jobs
436 // (i.e., there is enough free space in the code cache) there is
437 // no need to invoke the sweeper. As a result, the hotness of methods
438 // remains unchanged. This behavior is desired, since we want to keep
439 // the stable state, i.e., we do not want to evict methods from the
440 // code cache if it is unnecessary.
441 // We need a timed wait here, since compiler threads can exit if compilation
442 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
443 // is not critical and we do not want idle compiler threads to wake up too often.
444 locker.wait(5*1000);
445
446 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
447 // Still nothing to compile. Give caller a chance to stop this thread.
448 if (CompileBroker::can_remove(CompilerThread::current(), false)) return NULL;
449 }
450 }
451
452 if (CompileBroker::is_compilation_disabled_forever()) {
453 return NULL;
454 }
455
456 CompileTask* task;
457 {
458 NoSafepointVerifier nsv;
459 task = CompilationPolicy::policy()->select_task(this);
460 if (task != NULL) {
461 task = task->select_for_compilation();
462 }
463 }
464
465 if (task != NULL) {
466 // Save method pointers across unlock safepoint. The task is removed from
467 // the compilation queue, which is walked during RedefineClasses.
468 Thread* thread = Thread::current();
469 save_method = methodHandle(thread, task->method());
470 save_hot_method = methodHandle(thread, task->hot_method());
471
472 remove(task);
473 }
474 purge_stale_tasks(); // may temporarily release MCQ lock
475 return task;
476 }
477
478 // Clean & deallocate stale compile tasks.
479 // Temporarily releases MethodCompileQueue lock.
480 void CompileQueue::purge_stale_tasks() {
481 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
482 if (_first_stale != NULL) {
483 // Stale tasks are purged when MCQ lock is released,
484 // but _first_stale updates are protected by MCQ lock.
485 // Once task processing starts and MCQ lock is released,
486 // other compiler threads can reuse _first_stale.
487 CompileTask* head = _first_stale;
488 _first_stale = NULL;
489 {
490 MutexUnlocker ul(MethodCompileQueue_lock);
491 for (CompileTask* task = head; task != NULL; ) {
492 CompileTask* next_task = task->next();
493 CompileTaskWrapper ctw(task); // Frees the task
494 task->set_failure_reason("stale task");
495 task = next_task;
496 }
497 }
498 }
499 }
500
501 void CompileQueue::remove(CompileTask* task) {
502 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
503 if (task->prev() != NULL) {
504 task->prev()->set_next(task->next());
505 } else {
506 // max is the first element
507 assert(task == _first, "Sanity");
508 _first = task->next();
509 }
510
511 if (task->next() != NULL) {
512 task->next()->set_prev(task->prev());
513 } else {
514 // max is the last element
515 assert(task == _last, "Sanity");
516 _last = task->prev();
517 }
518 --_size;
519 }
520
521 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
522 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
523 remove(task);
524
525 // Enqueue the task for reclamation (should be done outside MCQ lock)
526 task->set_next(_first_stale);
527 task->set_prev(NULL);
528 _first_stale = task;
529 }
530
531 // methods in the compile queue need to be marked as used on the stack
532 // so that they don't get reclaimed by Redefine Classes
533 void CompileQueue::mark_on_stack() {
534 CompileTask* task = _first;
535 while (task != NULL) {
536 task->mark_on_stack();
537 task = task->next();
538 }
539 }
540
541
542 CompileQueue* CompileBroker::compile_queue(int comp_level) {
543 if (is_c2_compile(comp_level)) return _c2_compile_queue;
544 if (is_c1_compile(comp_level)) return _c1_compile_queue;
545 return NULL;
546 }
547
548 void CompileBroker::print_compile_queues(outputStream* st) {
549 st->print_cr("Current compiles: ");
550
551 char buf[2000];
552 int buflen = sizeof(buf);
553 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
554
555 st->cr();
556 if (_c1_compile_queue != NULL) {
557 _c1_compile_queue->print(st);
558 }
559 if (_c2_compile_queue != NULL) {
560 _c2_compile_queue->print(st);
561 }
562 }
563
564 void CompileQueue::print(outputStream* st) {
565 assert_locked_or_safepoint(MethodCompileQueue_lock);
566 st->print_cr("%s:", name());
567 CompileTask* task = _first;
568 if (task == NULL) {
569 st->print_cr("Empty");
570 } else {
571 while (task != NULL) {
572 task->print(st, NULL, true, true);
573 task = task->next();
574 }
575 }
576 st->cr();
577 }
578
579 void CompileQueue::print_tty() {
580 ResourceMark rm;
581 stringStream ss;
582 // Dump the compile queue into a buffer before locking the tty
583 print(&ss);
584 {
585 ttyLocker ttyl;
586 tty->print("%s", ss.as_string());
587 }
588 }
589
590 CompilerCounters::CompilerCounters() {
591 _current_method[0] = '\0';
592 _compile_type = CompileBroker::no_compile;
593 }
594
595 // ------------------------------------------------------------------
596 // CompileBroker::compilation_init
597 //
598 // Initialize the Compilation object
599 void CompileBroker::compilation_init_phase1(Thread* THREAD) {
600 // No need to initialize compilation system if we do not use it.
601 if (!UseCompiler) {
602 return;
603 }
604 // Set the interface to the current compiler(s).
605 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
606 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
607
608 #if INCLUDE_JVMCI
609 if (EnableJVMCI) {
610 // This is creating a JVMCICompiler singleton.
611 JVMCICompiler* jvmci = new JVMCICompiler();
612
613 if (UseJVMCICompiler) {
614 _compilers[1] = jvmci;
615 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
616 if (BootstrapJVMCI) {
617 // JVMCI will bootstrap so give it more threads
618 _c2_count = MIN2(32, os::active_processor_count());
619 }
620 } else {
621 _c2_count = JVMCIThreads;
622 }
623 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
624 } else {
625 _c1_count = JVMCIHostThreads;
626 }
627 }
628 }
629 #endif // INCLUDE_JVMCI
630
631 #ifdef COMPILER1
632 if (_c1_count > 0) {
633 _compilers[0] = new Compiler();
634 }
635 #endif // COMPILER1
636
637 #ifdef COMPILER2
638 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
639 if (_c2_count > 0) {
640 _compilers[1] = new C2Compiler();
641 }
642 }
643 #endif // COMPILER2
644
645 // Start the compiler thread(s) and the sweeper thread
646 init_compiler_sweeper_threads();
647 // totalTime performance counter is always created as it is required
648 // by the implementation of java.lang.management.CompilationMBean.
649 {
650 // Ensure OOM leads to vm_exit_during_initialization.
651 EXCEPTION_MARK;
652 _perf_total_compilation =
653 PerfDataManager::create_counter(JAVA_CI, "totalTime",
654 PerfData::U_Ticks, CHECK);
655 }
656
657 if (UsePerfData) {
658
659 EXCEPTION_MARK;
660
661 // create the jvmstat performance counters
662 _perf_osr_compilation =
663 PerfDataManager::create_counter(SUN_CI, "osrTime",
664 PerfData::U_Ticks, CHECK);
665
666 _perf_standard_compilation =
667 PerfDataManager::create_counter(SUN_CI, "standardTime",
668 PerfData::U_Ticks, CHECK);
669
670 _perf_total_bailout_count =
671 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
672 PerfData::U_Events, CHECK);
673
674 _perf_total_invalidated_count =
675 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
676 PerfData::U_Events, CHECK);
677
678 _perf_total_compile_count =
679 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
680 PerfData::U_Events, CHECK);
681 _perf_total_osr_compile_count =
682 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
683 PerfData::U_Events, CHECK);
684
685 _perf_total_standard_compile_count =
686 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
687 PerfData::U_Events, CHECK);
688
689 _perf_sum_osr_bytes_compiled =
690 PerfDataManager::create_counter(SUN_CI, "osrBytes",
691 PerfData::U_Bytes, CHECK);
692
693 _perf_sum_standard_bytes_compiled =
694 PerfDataManager::create_counter(SUN_CI, "standardBytes",
695 PerfData::U_Bytes, CHECK);
696
697 _perf_sum_nmethod_size =
698 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
699 PerfData::U_Bytes, CHECK);
700
701 _perf_sum_nmethod_code_size =
702 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
703 PerfData::U_Bytes, CHECK);
704
705 _perf_last_method =
706 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
707 CompilerCounters::cmname_buffer_length,
708 "", CHECK);
709
710 _perf_last_failed_method =
711 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
712 CompilerCounters::cmname_buffer_length,
713 "", CHECK);
714
715 _perf_last_invalidated_method =
716 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
717 CompilerCounters::cmname_buffer_length,
718 "", CHECK);
719
720 _perf_last_compile_type =
721 PerfDataManager::create_variable(SUN_CI, "lastType",
722 PerfData::U_None,
723 (jlong)CompileBroker::no_compile,
724 CHECK);
725
726 _perf_last_compile_size =
727 PerfDataManager::create_variable(SUN_CI, "lastSize",
728 PerfData::U_Bytes,
729 (jlong)CompileBroker::no_compile,
730 CHECK);
731
732
733 _perf_last_failed_type =
734 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
735 PerfData::U_None,
736 (jlong)CompileBroker::no_compile,
737 CHECK);
738
739 _perf_last_invalidated_type =
740 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
741 PerfData::U_None,
742 (jlong)CompileBroker::no_compile,
743 CHECK);
744 }
745 }
746
747 // Completes compiler initialization. Compilation requests submitted
748 // prior to this will be silently ignored.
749 void CompileBroker::compilation_init_phase2() {
750 _initialized = true;
751 }
752
753 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
754 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
755 Handle thread_group(THREAD, Universe::system_thread_group());
756 return JavaCalls::construct_new_instance(
757 SystemDictionary::Thread_klass(),
758 vmSymbols::threadgroup_string_void_signature(),
759 thread_group,
760 string,
761 CHECK_NH);
762 }
763
764
765 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, Thread* THREAD) {
766 JavaThread* new_thread = NULL;
767 {
768 MutexLocker mu(Threads_lock, THREAD);
769 if (comp != NULL) {
770 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
771 CompilerCounters* counters = new CompilerCounters();
772 new_thread = new CompilerThread(queue, counters);
773 }
774 } else {
775 new_thread = new CodeCacheSweeperThread();
776 }
777 // At this point the new CompilerThread data-races with this startup
778 // thread (which I believe is the primoridal thread and NOT the VM
779 // thread). This means Java bytecodes being executed at startup can
780 // queue compile jobs which will run at whatever default priority the
781 // newly created CompilerThread runs at.
782
783
784 // At this point it may be possible that no osthread was created for the
785 // JavaThread due to lack of memory. We would have to throw an exception
786 // in that case. However, since this must work and we do not allow
787 // exceptions anyway, check and abort if this fails. But first release the
788 // lock.
789
790 if (new_thread != NULL && new_thread->osthread() != NULL) {
791
792 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), new_thread);
793
794 // Note that this only sets the JavaThread _priority field, which by
795 // definition is limited to Java priorities and not OS priorities.
796 // The os-priority is set in the CompilerThread startup code itself
797
798 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
799
800 // Note that we cannot call os::set_priority because it expects Java
801 // priorities and we are *explicitly* using OS priorities so that it's
802 // possible to set the compiler thread priority higher than any Java
803 // thread.
804
805 int native_prio = CompilerThreadPriority;
806 if (native_prio == -1) {
807 if (UseCriticalCompilerThreadPriority) {
808 native_prio = os::java_to_os_priority[CriticalPriority];
809 } else {
810 native_prio = os::java_to_os_priority[NearMaxPriority];
811 }
812 }
813 os::set_native_priority(new_thread, native_prio);
814
815 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
816
817 new_thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
818 if (comp != NULL) {
819 new_thread->as_CompilerThread()->set_compiler(comp);
820 }
821 Threads::add(new_thread);
822 Thread::start(new_thread);
823 }
824 }
825
826 // First release lock before aborting VM.
827 if (new_thread == NULL || new_thread->osthread() == NULL) {
828 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) {
829 if (new_thread != NULL) {
830 new_thread->smr_delete();
831 }
832 return NULL;
833 }
834 vm_exit_during_initialization("java.lang.OutOfMemoryError",
835 os::native_thread_creation_failed_msg());
836 }
837
838 // Let go of Threads_lock before yielding
839 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
840
841 return new_thread;
842 }
843
844
845 void CompileBroker::init_compiler_sweeper_threads() {
846 // Ensure any exceptions lead to vm_exit_during_initialization.
847 EXCEPTION_MARK;
848 #if !defined(ZERO)
849 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
850 #endif // !ZERO
851 // Initialize the compilation queue
852 if (_c2_count > 0) {
853 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
854 _c2_compile_queue = new CompileQueue(name);
855 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
856 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
857 }
858 if (_c1_count > 0) {
859 _c1_compile_queue = new CompileQueue("C1 compile queue");
860 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
861 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
862 }
863
864 char name_buffer[256];
865
866 for (int i = 0; i < _c2_count; i++) {
867 jobject thread_handle = NULL;
868 // Create all j.l.Thread objects for C1 and C2 threads here, but only one
869 // for JVMCI compiler which can create further ones on demand.
870 JVMCI_ONLY(if (!UseJVMCICompiler || !UseDynamicNumberOfCompilerThreads || i == 0) {)
871 // Create a name for our thread.
872 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
873 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
874 thread_handle = JNIHandles::make_global(thread_oop);
875 JVMCI_ONLY(})
876 _compiler2_objects[i] = thread_handle;
877 _compiler2_logs[i] = NULL;
878
879 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
880 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], THREAD);
881 assert(ct != NULL, "should have been handled for initial thread");
882 _compilers[1]->set_num_compiler_threads(i + 1);
883 if (TraceCompilerThreads) {
884 ResourceMark rm;
885 MutexLocker mu(Threads_lock);
886 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
887 }
888 }
889 }
890
891 for (int i = 0; i < _c1_count; i++) {
892 // Create a name for our thread.
893 sprintf(name_buffer, "C1 CompilerThread%d", i);
894 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
895 jobject thread_handle = JNIHandles::make_global(thread_oop);
896 _compiler1_objects[i] = thread_handle;
897 _compiler1_logs[i] = NULL;
898
899 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
900 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], THREAD);
901 assert(ct != NULL, "should have been handled for initial thread");
902 _compilers[0]->set_num_compiler_threads(i + 1);
903 if (TraceCompilerThreads) {
904 ResourceMark rm;
905 MutexLocker mu(Threads_lock);
906 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
907 }
908 }
909 }
910
911 if (UsePerfData) {
912 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
913 }
914
915 if (MethodFlushing) {
916 // Initialize the sweeper thread
917 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK);
918 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
919 make_thread(thread_handle, NULL, NULL, THREAD);
920 }
921 }
922
923 void CompileBroker::possibly_add_compiler_threads(Thread* THREAD) {
924
925 julong available_memory = os::available_memory();
926 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
927 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
928 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
929
930 // Only do attempt to start additional threads if the lock is free.
931 if (!CompileThread_lock->try_lock()) return;
932
933 if (_c2_compile_queue != NULL) {
934 int old_c2_count = _compilers[1]->num_compiler_threads();
935 int new_c2_count = MIN4(_c2_count,
936 _c2_compile_queue->size() / 2,
937 (int)(available_memory / (200*M)),
938 (int)(available_cc_np / (128*K)));
939
940 for (int i = old_c2_count; i < new_c2_count; i++) {
941 #if INCLUDE_JVMCI
942 if (UseJVMCICompiler) {
943 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread
944 // objects as their existence is completely hidden from the rest of
945 // the VM (and those compiler threads can't call Java code to do the
946 // creation anyway). For JVMCI we have to create new j.l.Thread objects
947 // as they are visible and we can see unexpected thread lifecycle
948 // transitions if we bind them to new JavaThreads.
949 if (!THREAD->can_call_java()) break;
950 char name_buffer[256];
951 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
952 Handle thread_oop;
953 {
954 // We have to give up the lock temporarily for the Java calls.
955 MutexUnlocker mu(CompileThread_lock);
956 thread_oop = create_thread_oop(name_buffer, THREAD);
957 }
958 if (HAS_PENDING_EXCEPTION) {
959 if (TraceCompilerThreads) {
960 ResourceMark rm;
961 tty->print_cr("JVMCI compiler thread creation failed:");
962 PENDING_EXCEPTION->print();
963 }
964 CLEAR_PENDING_EXCEPTION;
965 break;
966 }
967 // Check if another thread has beaten us during the Java calls.
968 if (_compilers[1]->num_compiler_threads() != i) break;
969 jobject thread_handle = JNIHandles::make_global(thread_oop);
970 assert(compiler2_object(i) == NULL, "Old one must be released!");
971 _compiler2_objects[i] = thread_handle;
972 }
973 #endif
974 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD);
975 if (ct == NULL) break;
976 _compilers[1]->set_num_compiler_threads(i + 1);
977 if (TraceCompilerThreads) {
978 ResourceMark rm;
979 MutexLocker mu(Threads_lock);
980 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)",
981 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M));
982 }
983 }
984 }
985
986 if (_c1_compile_queue != NULL) {
987 int old_c1_count = _compilers[0]->num_compiler_threads();
988 int new_c1_count = MIN4(_c1_count,
989 _c1_compile_queue->size() / 4,
990 (int)(available_memory / (100*M)),
991 (int)(available_cc_p / (128*K)));
992
993 for (int i = old_c1_count; i < new_c1_count; i++) {
994 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD);
995 if (ct == NULL) break;
996 _compilers[0]->set_num_compiler_threads(i + 1);
997 if (TraceCompilerThreads) {
998 ResourceMark rm;
999 MutexLocker mu(Threads_lock);
1000 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)",
1001 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M));
1002 }
1003 }
1004 }
1005
1006 CompileThread_lock->unlock();
1007 }
1008
1009
1010 /**
1011 * Set the methods on the stack as on_stack so that redefine classes doesn't
1012 * reclaim them. This method is executed at a safepoint.
1013 */
1014 void CompileBroker::mark_on_stack() {
1015 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1016 // Since we are at a safepoint, we do not need a lock to access
1017 // the compile queues.
1018 if (_c2_compile_queue != NULL) {
1019 _c2_compile_queue->mark_on_stack();
1020 }
1021 if (_c1_compile_queue != NULL) {
1022 _c1_compile_queue->mark_on_stack();
1023 }
1024 }
1025
1026 // ------------------------------------------------------------------
1027 // CompileBroker::compile_method
1028 //
1029 // Request compilation of a method.
1030 void CompileBroker::compile_method_base(const methodHandle& method,
1031 int osr_bci,
1032 int comp_level,
1033 const methodHandle& hot_method,
1034 int hot_count,
1035 CompileTask::CompileReason compile_reason,
1036 bool blocking,
1037 Thread* thread) {
1038 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1039 assert(method->method_holder()->is_instance_klass(),
1040 "sanity check");
1041 assert(!method->method_holder()->is_not_initialized(),
1042 "method holder must be initialized");
1043 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1044
1045 if (CIPrintRequests) {
1046 tty->print("request: ");
1047 method->print_short_name(tty);
1048 if (osr_bci != InvocationEntryBci) {
1049 tty->print(" osr_bci: %d", osr_bci);
1050 }
1051 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1052 if (!hot_method.is_null()) {
1053 tty->print(" hot: ");
1054 if (hot_method() != method()) {
1055 hot_method->print_short_name(tty);
1056 } else {
1057 tty->print("yes");
1058 }
1059 }
1060 tty->cr();
1061 }
1062
1063 // A request has been made for compilation. Before we do any
1064 // real work, check to see if the method has been compiled
1065 // in the meantime with a definitive result.
1066 if (compilation_is_complete(method, osr_bci, comp_level)) {
1067 return;
1068 }
1069
1070 #ifndef PRODUCT
1071 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1072 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1073 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1074 return;
1075 }
1076 }
1077 #endif
1078
1079 // If this method is already in the compile queue, then
1080 // we do not block the current thread.
1081 if (compilation_is_in_queue(method)) {
1082 // We may want to decay our counter a bit here to prevent
1083 // multiple denied requests for compilation. This is an
1084 // open compilation policy issue. Note: The other possibility,
1085 // in the case that this is a blocking compile request, is to have
1086 // all subsequent blocking requesters wait for completion of
1087 // ongoing compiles. Note that in this case we'll need a protocol
1088 // for freeing the associated compile tasks. [Or we could have
1089 // a single static monitor on which all these waiters sleep.]
1090 return;
1091 }
1092
1093 if (TieredCompilation) {
1094 // Tiered policy requires MethodCounters to exist before adding a method to
1095 // the queue. Create if we don't have them yet.
1096 method->get_method_counters(thread);
1097 }
1098
1099 // Outputs from the following MutexLocker block:
1100 CompileTask* task = NULL;
1101 CompileQueue* queue = compile_queue(comp_level);
1102
1103 // Acquire our lock.
1104 {
1105 MutexLocker locker(MethodCompileQueue_lock, thread);
1106
1107 // Make sure the method has not slipped into the queues since
1108 // last we checked; note that those checks were "fast bail-outs".
1109 // Here we need to be more careful, see 14012000 below.
1110 if (compilation_is_in_queue(method)) {
1111 return;
1112 }
1113
1114 // We need to check again to see if the compilation has
1115 // completed. A previous compilation may have registered
1116 // some result.
1117 if (compilation_is_complete(method, osr_bci, comp_level)) {
1118 return;
1119 }
1120
1121 // We now know that this compilation is not pending, complete,
1122 // or prohibited. Assign a compile_id to this compilation
1123 // and check to see if it is in our [Start..Stop) range.
1124 int compile_id = assign_compile_id(method, osr_bci);
1125 if (compile_id == 0) {
1126 // The compilation falls outside the allowed range.
1127 return;
1128 }
1129
1130 #if INCLUDE_JVMCI
1131 if (UseJVMCICompiler && blocking) {
1132 // Don't allow blocking compiles for requests triggered by JVMCI.
1133 if (thread->is_Compiler_thread()) {
1134 blocking = false;
1135 }
1136
1137 if (!UseJVMCINativeLibrary) {
1138 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1139 vframeStream vfst((JavaThread*) thread);
1140 for (; !vfst.at_end(); vfst.next()) {
1141 if (vfst.method()->is_static_initializer() ||
1142 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1143 vfst.method()->name() == vmSymbols::loadClass_name())) {
1144 blocking = false;
1145 break;
1146 }
1147 }
1148 }
1149
1150 // Don't allow blocking compilation requests to JVMCI
1151 // if JVMCI itself is not yet initialized
1152 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1153 blocking = false;
1154 }
1155
1156 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1157 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1158 // such as the DestroyJavaVM thread.
1159 if (JVMCI::shutdown_called()) {
1160 blocking = false;
1161 }
1162 }
1163 #endif // INCLUDE_JVMCI
1164
1165 // We will enter the compilation in the queue.
1166 // 14012000: Note that this sets the queued_for_compile bits in
1167 // the target method. We can now reason that a method cannot be
1168 // queued for compilation more than once, as follows:
1169 // Before a thread queues a task for compilation, it first acquires
1170 // the compile queue lock, then checks if the method's queued bits
1171 // are set or it has already been compiled. Thus there can not be two
1172 // instances of a compilation task for the same method on the
1173 // compilation queue. Consider now the case where the compilation
1174 // thread has already removed a task for that method from the queue
1175 // and is in the midst of compiling it. In this case, the
1176 // queued_for_compile bits must be set in the method (and these
1177 // will be visible to the current thread, since the bits were set
1178 // under protection of the compile queue lock, which we hold now.
1179 // When the compilation completes, the compiler thread first sets
1180 // the compilation result and then clears the queued_for_compile
1181 // bits. Neither of these actions are protected by a barrier (or done
1182 // under the protection of a lock), so the only guarantee we have
1183 // (on machines with TSO (Total Store Order)) is that these values
1184 // will update in that order. As a result, the only combinations of
1185 // these bits that the current thread will see are, in temporal order:
1186 // <RESULT, QUEUE> :
1187 // <0, 1> : in compile queue, but not yet compiled
1188 // <1, 1> : compiled but queue bit not cleared
1189 // <1, 0> : compiled and queue bit cleared
1190 // Because we first check the queue bits then check the result bits,
1191 // we are assured that we cannot introduce a duplicate task.
1192 // Note that if we did the tests in the reverse order (i.e. check
1193 // result then check queued bit), we could get the result bit before
1194 // the compilation completed, and the queue bit after the compilation
1195 // completed, and end up introducing a "duplicate" (redundant) task.
1196 // In that case, the compiler thread should first check if a method
1197 // has already been compiled before trying to compile it.
1198 // NOTE: in the event that there are multiple compiler threads and
1199 // there is de-optimization/recompilation, things will get hairy,
1200 // and in that case it's best to protect both the testing (here) of
1201 // these bits, and their updating (here and elsewhere) under a
1202 // common lock.
1203 task = create_compile_task(queue,
1204 compile_id, method,
1205 osr_bci, comp_level,
1206 hot_method, hot_count, compile_reason,
1207 blocking);
1208 }
1209
1210 if (blocking) {
1211 wait_for_completion(task);
1212 }
1213 }
1214
1215 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1216 int comp_level,
1217 const methodHandle& hot_method, int hot_count,
1218 CompileTask::CompileReason compile_reason,
1219 Thread* THREAD) {
1220 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1221 if (!_initialized || comp_level == CompLevel_none) {
1222 return NULL;
1223 }
1224
1225 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1226 assert(comp != NULL, "Ensure we have a compiler");
1227
1228 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1229 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1230 DirectivesStack::release(directive);
1231 return nm;
1232 }
1233
1234 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1235 int comp_level,
1236 const methodHandle& hot_method, int hot_count,
1237 CompileTask::CompileReason compile_reason,
1238 DirectiveSet* directive,
1239 Thread* THREAD) {
1240
1241 // make sure arguments make sense
1242 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1243 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1244 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1245 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1246 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1247 // allow any levels for WhiteBox
1248 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1249 // return quickly if possible
1250
1251 // lock, make sure that the compilation
1252 // isn't prohibited in a straightforward way.
1253 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1254 if (comp == NULL || !comp->can_compile_method(method) ||
1255 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1256 return NULL;
1257 }
1258
1259 #if INCLUDE_JVMCI
1260 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1261 return NULL;
1262 }
1263 #endif
1264
1265 if (osr_bci == InvocationEntryBci) {
1266 // standard compilation
1267 CompiledMethod* method_code = method->code();
1268 if (method_code != NULL && method_code->is_nmethod()) {
1269 if (compilation_is_complete(method, osr_bci, comp_level)) {
1270 return (nmethod*) method_code;
1271 }
1272 }
1273 if (method->is_not_compilable(comp_level)) {
1274 return NULL;
1275 }
1276 } else {
1277 // osr compilation
1278 #ifndef TIERED
1279 // seems like an assert of dubious value
1280 assert(comp_level == CompLevel_highest_tier,
1281 "all OSR compiles are assumed to be at a single compilation level");
1282 #endif // TIERED
1283 // We accept a higher level osr method
1284 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1285 if (nm != NULL) return nm;
1286 if (method->is_not_osr_compilable(comp_level)) return NULL;
1287 }
1288
1289 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1290 // some prerequisites that are compiler specific
1291 if (comp->is_c2()) {
1292 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1293 // Resolve all classes seen in the signature of the method
1294 // we are compiling.
1295 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1296 }
1297
1298 // If the method is native, do the lookup in the thread requesting
1299 // the compilation. Native lookups can load code, which is not
1300 // permitted during compilation.
1301 //
1302 // Note: A native method implies non-osr compilation which is
1303 // checked with an assertion at the entry of this method.
1304 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1305 bool in_base_library;
1306 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1307 if (HAS_PENDING_EXCEPTION) {
1308 // In case of an exception looking up the method, we just forget
1309 // about it. The interpreter will kick-in and throw the exception.
1310 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1311 CLEAR_PENDING_EXCEPTION;
1312 return NULL;
1313 }
1314 assert(method->has_native_function(), "must have native code by now");
1315 }
1316
1317 // RedefineClasses() has replaced this method; just return
1318 if (method->is_old()) {
1319 return NULL;
1320 }
1321
1322 // JVMTI -- post_compile_event requires jmethod_id() that may require
1323 // a lock the compiling thread can not acquire. Prefetch it here.
1324 if (JvmtiExport::should_post_compiled_method_load()) {
1325 method->jmethod_id();
1326 }
1327
1328 // do the compilation
1329 if (method->is_native()) {
1330 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1331 // The following native methods:
1332 //
1333 // java.lang.Float.intBitsToFloat
1334 // java.lang.Float.floatToRawIntBits
1335 // java.lang.Double.longBitsToDouble
1336 // java.lang.Double.doubleToRawLongBits
1337 //
1338 // are called through the interpreter even if interpreter native stubs
1339 // are not preferred (i.e., calling through adapter handlers is preferred).
1340 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1341 // if the version of the methods from the native libraries is called.
1342 // As the interpreter and the C2-intrinsified version of the methods preserves
1343 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1344 if ((UseSSE >= 1 &&
1345 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1346 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1347 (UseSSE >= 2 &&
1348 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1349 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1350 return NULL;
1351 }
1352
1353 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1354 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1355 //
1356 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1357 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1358 AdapterHandlerLibrary::create_native_wrapper(method);
1359 } else {
1360 return NULL;
1361 }
1362 } else {
1363 // If the compiler is shut off due to code cache getting full
1364 // fail out now so blocking compiles dont hang the java thread
1365 if (!should_compile_new_jobs()) {
1366 CompilationPolicy::policy()->delay_compilation(method());
1367 return NULL;
1368 }
1369 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1370 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1371 }
1372
1373 // return requested nmethod
1374 // We accept a higher level osr method
1375 if (osr_bci == InvocationEntryBci) {
1376 CompiledMethod* code = method->code();
1377 if (code == NULL) {
1378 return (nmethod*) code;
1379 } else {
1380 return code->as_nmethod_or_null();
1381 }
1382 }
1383 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1384 }
1385
1386
1387 // ------------------------------------------------------------------
1388 // CompileBroker::compilation_is_complete
1389 //
1390 // See if compilation of this method is already complete.
1391 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1392 int osr_bci,
1393 int comp_level) {
1394 bool is_osr = (osr_bci != standard_entry_bci);
1395 if (is_osr) {
1396 if (method->is_not_osr_compilable(comp_level)) {
1397 return true;
1398 } else {
1399 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1400 return (result != NULL);
1401 }
1402 } else {
1403 if (method->is_not_compilable(comp_level)) {
1404 return true;
1405 } else {
1406 CompiledMethod* result = method->code();
1407 if (result == NULL) return false;
1408 return comp_level == result->comp_level();
1409 }
1410 }
1411 }
1412
1413
1414 /**
1415 * See if this compilation is already requested.
1416 *
1417 * Implementation note: there is only a single "is in queue" bit
1418 * for each method. This means that the check below is overly
1419 * conservative in the sense that an osr compilation in the queue
1420 * will block a normal compilation from entering the queue (and vice
1421 * versa). This can be remedied by a full queue search to disambiguate
1422 * cases. If it is deemed profitable, this may be done.
1423 */
1424 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1425 return method->queued_for_compilation();
1426 }
1427
1428 // ------------------------------------------------------------------
1429 // CompileBroker::compilation_is_prohibited
1430 //
1431 // See if this compilation is not allowed.
1432 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1433 bool is_native = method->is_native();
1434 // Some compilers may not support the compilation of natives.
1435 AbstractCompiler *comp = compiler(comp_level);
1436 if (is_native &&
1437 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1438 method->set_not_compilable_quietly("native methods not supported", comp_level);
1439 return true;
1440 }
1441
1442 bool is_osr = (osr_bci != standard_entry_bci);
1443 // Some compilers may not support on stack replacement.
1444 if (is_osr &&
1445 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1446 method->set_not_osr_compilable("OSR not supported", comp_level);
1447 return true;
1448 }
1449
1450 // The method may be explicitly excluded by the user.
1451 double scale;
1452 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1453 bool quietly = CompilerOracle::should_exclude_quietly();
1454 if (PrintCompilation && !quietly) {
1455 // This does not happen quietly...
1456 ResourceMark rm;
1457 tty->print("### Excluding %s:%s",
1458 method->is_native() ? "generation of native wrapper" : "compile",
1459 (method->is_static() ? " static" : ""));
1460 method->print_short_name(tty);
1461 tty->cr();
1462 }
1463 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1464 }
1465
1466 return false;
1467 }
1468
1469 /**
1470 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1471 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1472 * The function also allows to generate separate compilation IDs for OSR compilations.
1473 */
1474 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1475 #ifdef ASSERT
1476 bool is_osr = (osr_bci != standard_entry_bci);
1477 int id;
1478 if (method->is_native()) {
1479 assert(!is_osr, "can't be osr");
1480 // Adapters, native wrappers and method handle intrinsics
1481 // should be generated always.
1482 return Atomic::add(&_compilation_id, 1);
1483 } else if (CICountOSR && is_osr) {
1484 id = Atomic::add(&_osr_compilation_id, 1);
1485 if (CIStartOSR <= id && id < CIStopOSR) {
1486 return id;
1487 }
1488 } else {
1489 id = Atomic::add(&_compilation_id, 1);
1490 if (CIStart <= id && id < CIStop) {
1491 return id;
1492 }
1493 }
1494
1495 // Method was not in the appropriate compilation range.
1496 method->set_not_compilable_quietly("Not in requested compile id range");
1497 return 0;
1498 #else
1499 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1500 // only _compilation_id is incremented.
1501 return Atomic::add(&_compilation_id, 1);
1502 #endif
1503 }
1504
1505 // ------------------------------------------------------------------
1506 // CompileBroker::assign_compile_id_unlocked
1507 //
1508 // Public wrapper for assign_compile_id that acquires the needed locks
1509 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1510 MutexLocker locker(MethodCompileQueue_lock, thread);
1511 return assign_compile_id(method, osr_bci);
1512 }
1513
1514 // ------------------------------------------------------------------
1515 // CompileBroker::create_compile_task
1516 //
1517 // Create a CompileTask object representing the current request for
1518 // compilation. Add this task to the queue.
1519 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1520 int compile_id,
1521 const methodHandle& method,
1522 int osr_bci,
1523 int comp_level,
1524 const methodHandle& hot_method,
1525 int hot_count,
1526 CompileTask::CompileReason compile_reason,
1527 bool blocking) {
1528 CompileTask* new_task = CompileTask::allocate();
1529 new_task->initialize(compile_id, method, osr_bci, comp_level,
1530 hot_method, hot_count, compile_reason,
1531 blocking);
1532 queue->add(new_task);
1533 return new_task;
1534 }
1535
1536 #if INCLUDE_JVMCI
1537 // The number of milliseconds to wait before checking if
1538 // JVMCI compilation has made progress.
1539 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1540
1541 // The number of JVMCI compilation progress checks that must fail
1542 // before unblocking a thread waiting for a blocking compilation.
1543 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1544
1545 /**
1546 * Waits for a JVMCI compiler to complete a given task. This thread
1547 * waits until either the task completes or it sees no JVMCI compilation
1548 * progress for N consecutive milliseconds where N is
1549 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1550 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1551 *
1552 * @return true if this thread needs to free/recycle the task
1553 */
1554 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1555 MonitorLocker ml(task->lock(), thread);
1556 int progress_wait_attempts = 0;
1557 int methods_compiled = jvmci->methods_compiled();
1558 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1559 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1560 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1561
1562 bool progress;
1563 if (jvmci_compiler_thread != NULL) {
1564 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1565 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1566 !jvmci_compiler_thread->is_external_suspend();
1567 } else {
1568 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1569 // that all JVMCI compiler threads are blocked on. We use the counter for
1570 // successful JVMCI compilations to determine whether JVMCI compilation
1571 // is still making progress through the JVMCI compiler queue.
1572 progress = jvmci->methods_compiled() != methods_compiled;
1573 }
1574
1575 if (!progress) {
1576 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1577 if (PrintCompilation) {
1578 task->print(tty, "wait for blocking compilation timed out");
1579 }
1580 break;
1581 }
1582 } else {
1583 progress_wait_attempts = 0;
1584 if (jvmci_compiler_thread == NULL) {
1585 methods_compiled = jvmci->methods_compiled();
1586 }
1587 }
1588 }
1589 task->clear_waiter();
1590 return task->is_complete();
1591 }
1592 #endif
1593
1594 /**
1595 * Wait for the compilation task to complete.
1596 */
1597 void CompileBroker::wait_for_completion(CompileTask* task) {
1598 if (CIPrintCompileQueue) {
1599 ttyLocker ttyl;
1600 tty->print_cr("BLOCKING FOR COMPILE");
1601 }
1602
1603 assert(task->is_blocking(), "can only wait on blocking task");
1604
1605 JavaThread* thread = JavaThread::current();
1606
1607 methodHandle method(thread, task->method());
1608 bool free_task;
1609 #if INCLUDE_JVMCI
1610 AbstractCompiler* comp = compiler(task->comp_level());
1611 if (comp->is_jvmci()) {
1612 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1613 } else
1614 #endif
1615 {
1616 MonitorLocker ml(task->lock(), thread);
1617 free_task = true;
1618 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1619 ml.wait();
1620 }
1621 }
1622
1623 if (free_task) {
1624 if (is_compilation_disabled_forever()) {
1625 CompileTask::free(task);
1626 return;
1627 }
1628
1629 // It is harmless to check this status without the lock, because
1630 // completion is a stable property (until the task object is recycled).
1631 assert(task->is_complete(), "Compilation should have completed");
1632 assert(task->code_handle() == NULL, "must be reset");
1633
1634 // By convention, the waiter is responsible for recycling a
1635 // blocking CompileTask. Since there is only one waiter ever
1636 // waiting on a CompileTask, we know that no one else will
1637 // be using this CompileTask; we can free it.
1638 CompileTask::free(task);
1639 }
1640 }
1641
1642 /**
1643 * Initialize compiler thread(s) + compiler object(s). The postcondition
1644 * of this function is that the compiler runtimes are initialized and that
1645 * compiler threads can start compiling.
1646 */
1647 bool CompileBroker::init_compiler_runtime() {
1648 CompilerThread* thread = CompilerThread::current();
1649 AbstractCompiler* comp = thread->compiler();
1650 // Final sanity check - the compiler object must exist
1651 guarantee(comp != NULL, "Compiler object must exist");
1652
1653 {
1654 // Must switch to native to allocate ci_env
1655 ThreadToNativeFromVM ttn(thread);
1656 ciEnv ci_env((CompileTask*)NULL);
1657 // Cache Jvmti state
1658 ci_env.cache_jvmti_state();
1659 // Cache DTrace flags
1660 ci_env.cache_dtrace_flags();
1661
1662 // Switch back to VM state to do compiler initialization
1663 ThreadInVMfromNative tv(thread);
1664 ResetNoHandleMark rnhm;
1665
1666 // Perform per-thread and global initializations
1667 comp->initialize();
1668 }
1669
1670 if (comp->is_failed()) {
1671 disable_compilation_forever();
1672 // If compiler initialization failed, no compiler thread that is specific to a
1673 // particular compiler runtime will ever start to compile methods.
1674 shutdown_compiler_runtime(comp, thread);
1675 return false;
1676 }
1677
1678 // C1 specific check
1679 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1680 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1681 return false;
1682 }
1683
1684 return true;
1685 }
1686
1687 /**
1688 * If C1 and/or C2 initialization failed, we shut down all compilation.
1689 * We do this to keep things simple. This can be changed if it ever turns
1690 * out to be a problem.
1691 */
1692 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1693 // Free buffer blob, if allocated
1694 if (thread->get_buffer_blob() != NULL) {
1695 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1696 CodeCache::free(thread->get_buffer_blob());
1697 }
1698
1699 if (comp->should_perform_shutdown()) {
1700 // There are two reasons for shutting down the compiler
1701 // 1) compiler runtime initialization failed
1702 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1703 warning("%s initialization failed. Shutting down all compilers", comp->name());
1704
1705 // Only one thread per compiler runtime object enters here
1706 // Set state to shut down
1707 comp->set_shut_down();
1708
1709 // Delete all queued compilation tasks to make compiler threads exit faster.
1710 if (_c1_compile_queue != NULL) {
1711 _c1_compile_queue->free_all();
1712 }
1713
1714 if (_c2_compile_queue != NULL) {
1715 _c2_compile_queue->free_all();
1716 }
1717
1718 // Set flags so that we continue execution with using interpreter only.
1719 UseCompiler = false;
1720 UseInterpreter = true;
1721
1722 // We could delete compiler runtimes also. However, there are references to
1723 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1724 // fail. This can be done later if necessary.
1725 }
1726 }
1727
1728 /**
1729 * Helper function to create new or reuse old CompileLog.
1730 */
1731 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1732 if (!LogCompilation) return NULL;
1733
1734 AbstractCompiler *compiler = ct->compiler();
1735 bool c1 = compiler->is_c1();
1736 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1737 assert(compiler_objects != NULL, "must be initialized at this point");
1738 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1739 assert(logs != NULL, "must be initialized at this point");
1740 int count = c1 ? _c1_count : _c2_count;
1741
1742 // Find Compiler number by its threadObj.
1743 oop compiler_obj = ct->threadObj();
1744 int compiler_number = 0;
1745 bool found = false;
1746 for (; compiler_number < count; compiler_number++) {
1747 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
1748 found = true;
1749 break;
1750 }
1751 }
1752 assert(found, "Compiler must exist at this point");
1753
1754 // Determine pointer for this thread's log.
1755 CompileLog** log_ptr = &logs[compiler_number];
1756
1757 // Return old one if it exists.
1758 CompileLog* log = *log_ptr;
1759 if (log != NULL) {
1760 ct->init_log(log);
1761 return log;
1762 }
1763
1764 // Create a new one and remember it.
1765 init_compiler_thread_log();
1766 log = ct->log();
1767 *log_ptr = log;
1768 return log;
1769 }
1770
1771 // ------------------------------------------------------------------
1772 // CompileBroker::compiler_thread_loop
1773 //
1774 // The main loop run by a CompilerThread.
1775 void CompileBroker::compiler_thread_loop() {
1776 CompilerThread* thread = CompilerThread::current();
1777 CompileQueue* queue = thread->queue();
1778 // For the thread that initializes the ciObjectFactory
1779 // this resource mark holds all the shared objects
1780 ResourceMark rm;
1781
1782 // First thread to get here will initialize the compiler interface
1783
1784 {
1785 ASSERT_IN_VM;
1786 MutexLocker only_one (CompileThread_lock, thread);
1787 if (!ciObjectFactory::is_initialized()) {
1788 ciObjectFactory::initialize();
1789 }
1790 }
1791
1792 // Open a log.
1793 CompileLog* log = get_log(thread);
1794 if (log != NULL) {
1795 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1796 thread->name(),
1797 os::current_thread_id(),
1798 os::current_process_id());
1799 log->stamp();
1800 log->end_elem();
1801 }
1802
1803 // If compiler thread/runtime initialization fails, exit the compiler thread
1804 if (!init_compiler_runtime()) {
1805 return;
1806 }
1807
1808 thread->start_idle_timer();
1809
1810 // Poll for new compilation tasks as long as the JVM runs. Compilation
1811 // should only be disabled if something went wrong while initializing the
1812 // compiler runtimes. This, in turn, should not happen. The only known case
1813 // when compiler runtime initialization fails is if there is not enough free
1814 // space in the code cache to generate the necessary stubs, etc.
1815 while (!is_compilation_disabled_forever()) {
1816 // We need this HandleMark to avoid leaking VM handles.
1817 HandleMark hm(thread);
1818
1819 CompileTask* task = queue->get();
1820 if (task == NULL) {
1821 if (UseDynamicNumberOfCompilerThreads) {
1822 // Access compiler_count under lock to enforce consistency.
1823 MutexLocker only_one(CompileThread_lock);
1824 if (can_remove(thread, true)) {
1825 if (TraceCompilerThreads) {
1826 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1827 thread->name(), thread->idle_time_millis());
1828 }
1829 // Free buffer blob, if allocated
1830 if (thread->get_buffer_blob() != NULL) {
1831 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1832 CodeCache::free(thread->get_buffer_blob());
1833 }
1834 return; // Stop this thread.
1835 }
1836 }
1837 } else {
1838 // Assign the task to the current thread. Mark this compilation
1839 // thread as active for the profiler.
1840 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1841 // occurs after fetching the compile task off the queue.
1842 CompileTaskWrapper ctw(task);
1843 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1844 task->set_code_handle(&result_handle);
1845 methodHandle method(thread, task->method());
1846
1847 // Never compile a method if breakpoints are present in it
1848 if (method()->number_of_breakpoints() == 0) {
1849 // Compile the method.
1850 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1851 invoke_compiler_on_method(task);
1852 thread->start_idle_timer();
1853 } else {
1854 // After compilation is disabled, remove remaining methods from queue
1855 method->clear_queued_for_compilation();
1856 task->set_failure_reason("compilation is disabled");
1857 }
1858 }
1859
1860 if (UseDynamicNumberOfCompilerThreads) {
1861 possibly_add_compiler_threads(thread);
1862 assert(!thread->has_pending_exception(), "should have been handled");
1863 }
1864 }
1865 }
1866
1867 // Shut down compiler runtime
1868 shutdown_compiler_runtime(thread->compiler(), thread);
1869 }
1870
1871 // ------------------------------------------------------------------
1872 // CompileBroker::init_compiler_thread_log
1873 //
1874 // Set up state required by +LogCompilation.
1875 void CompileBroker::init_compiler_thread_log() {
1876 CompilerThread* thread = CompilerThread::current();
1877 char file_name[4*K];
1878 FILE* fp = NULL;
1879 intx thread_id = os::current_thread_id();
1880 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1881 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1882 if (dir == NULL) {
1883 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1884 thread_id, os::current_process_id());
1885 } else {
1886 jio_snprintf(file_name, sizeof(file_name),
1887 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1888 os::file_separator(), thread_id, os::current_process_id());
1889 }
1890
1891 fp = fopen(file_name, "wt");
1892 if (fp != NULL) {
1893 if (LogCompilation && Verbose) {
1894 tty->print_cr("Opening compilation log %s", file_name);
1895 }
1896 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1897 if (log == NULL) {
1898 fclose(fp);
1899 return;
1900 }
1901 thread->init_log(log);
1902
1903 if (xtty != NULL) {
1904 ttyLocker ttyl;
1905 // Record any per thread log files
1906 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1907 }
1908 return;
1909 }
1910 }
1911 warning("Cannot open log file: %s", file_name);
1912 }
1913
1914 void CompileBroker::log_metaspace_failure() {
1915 const char* message = "some methods may not be compiled because metaspace "
1916 "is out of memory";
1917 if (_compilation_log != NULL) {
1918 _compilation_log->log_metaspace_failure(message);
1919 }
1920 if (PrintCompilation) {
1921 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1922 }
1923 }
1924
1925
1926 // ------------------------------------------------------------------
1927 // CompileBroker::set_should_block
1928 //
1929 // Set _should_block.
1930 // Call this from the VM, with Threads_lock held and a safepoint requested.
1931 void CompileBroker::set_should_block() {
1932 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1933 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1934 #ifndef PRODUCT
1935 if (PrintCompilation && (Verbose || WizardMode))
1936 tty->print_cr("notifying compiler thread pool to block");
1937 #endif
1938 _should_block = true;
1939 }
1940
1941 // ------------------------------------------------------------------
1942 // CompileBroker::maybe_block
1943 //
1944 // Call this from the compiler at convenient points, to poll for _should_block.
1945 void CompileBroker::maybe_block() {
1946 if (_should_block) {
1947 #ifndef PRODUCT
1948 if (PrintCompilation && (Verbose || WizardMode))
1949 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1950 #endif
1951 ThreadInVMfromNative tivfn(JavaThread::current());
1952 }
1953 }
1954
1955 // wrapper for CodeCache::print_summary()
1956 static void codecache_print(bool detailed)
1957 {
1958 ResourceMark rm;
1959 stringStream s;
1960 // Dump code cache into a buffer before locking the tty,
1961 {
1962 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1963 CodeCache::print_summary(&s, detailed);
1964 }
1965 ttyLocker ttyl;
1966 tty->print("%s", s.as_string());
1967 }
1968
1969 // wrapper for CodeCache::print_summary() using outputStream
1970 static void codecache_print(outputStream* out, bool detailed) {
1971 ResourceMark rm;
1972 stringStream s;
1973
1974 // Dump code cache into a buffer
1975 {
1976 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1977 CodeCache::print_summary(&s, detailed);
1978 }
1979
1980 char* remaining_log = s.as_string();
1981 while (*remaining_log != '\0') {
1982 char* eol = strchr(remaining_log, '\n');
1983 if (eol == NULL) {
1984 out->print_cr("%s", remaining_log);
1985 remaining_log = remaining_log + strlen(remaining_log);
1986 } else {
1987 *eol = '\0';
1988 out->print_cr("%s", remaining_log);
1989 remaining_log = eol + 1;
1990 }
1991 }
1992 }
1993
1994 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env,
1995 int compilable, const char* failure_reason) {
1996 if (success) {
1997 task->mark_success();
1998 if (ci_env != NULL) {
1999 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
2000 }
2001 if (_compilation_log != NULL) {
2002 nmethod* code = task->code();
2003 if (code != NULL) {
2004 _compilation_log->log_nmethod(thread, code);
2005 }
2006 }
2007 } else if (AbortVMOnCompilationFailure) {
2008 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
2009 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
2010 }
2011 if (compilable == ciEnv::MethodCompilable_never) {
2012 fatal("Never compilable: %s", failure_reason);
2013 }
2014 }
2015 // simulate crash during compilation
2016 assert(task->compile_id() != CICrashAt, "just as planned");
2017 }
2018
2019 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
2020 assert(event != NULL, "invariant");
2021 assert(event->should_commit(), "invariant");
2022 event->set_method(task->method());
2023 event->set_compileId(task->compile_id());
2024 event->set_compileLevel(task->comp_level());
2025 event->set_succeded(task->is_success());
2026 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
2027 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
2028 event->set_inlinedBytes(task->num_inlined_bytecodes());
2029 event->commit();
2030 }
2031
2032 int DirectivesStack::_depth = 0;
2033 CompilerDirectives* DirectivesStack::_top = NULL;
2034 CompilerDirectives* DirectivesStack::_bottom = NULL;
2035
2036 // ------------------------------------------------------------------
2037 // CompileBroker::invoke_compiler_on_method
2038 //
2039 // Compile a method.
2040 //
2041 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2042 task->print_ul();
2043 if (PrintCompilation) {
2044 ResourceMark rm;
2045 task->print_tty();
2046 }
2047 elapsedTimer time;
2048
2049 CompilerThread* thread = CompilerThread::current();
2050 ResourceMark rm(thread);
2051
2052 if (LogEvents) {
2053 _compilation_log->log_compile(thread, task);
2054 }
2055
2056 // Common flags.
2057 uint compile_id = task->compile_id();
2058 int osr_bci = task->osr_bci();
2059 bool is_osr = (osr_bci != standard_entry_bci);
2060 bool should_log = (thread->log() != NULL);
2061 bool should_break = false;
2062 const int task_level = task->comp_level();
2063 AbstractCompiler* comp = task->compiler();
2064
2065 DirectiveSet* directive;
2066 {
2067 // create the handle inside it's own block so it can't
2068 // accidentally be referenced once the thread transitions to
2069 // native. The NoHandleMark before the transition should catch
2070 // any cases where this occurs in the future.
2071 methodHandle method(thread, task->method());
2072 assert(!method->is_native(), "no longer compile natives");
2073
2074 // Look up matching directives
2075 directive = DirectivesStack::getMatchingDirective(method, comp);
2076
2077 // Update compile information when using perfdata.
2078 if (UsePerfData) {
2079 update_compile_perf_data(thread, method, is_osr);
2080 }
2081
2082 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2083 }
2084
2085 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2086 if (should_log && !directive->LogOption) {
2087 should_log = false;
2088 }
2089
2090 // Allocate a new set of JNI handles.
2091 push_jni_handle_block();
2092 Method* target_handle = task->method();
2093 int compilable = ciEnv::MethodCompilable;
2094 const char* failure_reason = NULL;
2095 bool failure_reason_on_C_heap = false;
2096 const char* retry_message = NULL;
2097
2098 #if INCLUDE_JVMCI
2099 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2100 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2101
2102 TraceTime t1("compilation", &time);
2103 EventCompilation event;
2104
2105 // Skip redefined methods
2106 if (target_handle->is_old()) {
2107 failure_reason = "redefined method";
2108 retry_message = "not retryable";
2109 compilable = ciEnv::MethodCompilable_never;
2110 } else {
2111 JVMCICompileState compile_state(task);
2112 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2113 methodHandle method(thread, target_handle);
2114 env.runtime()->compile_method(&env, jvmci, method, osr_bci);
2115
2116 failure_reason = compile_state.failure_reason();
2117 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2118 if (!compile_state.retryable()) {
2119 retry_message = "not retryable";
2120 compilable = ciEnv::MethodCompilable_not_at_tier;
2121 }
2122 if (task->code() == NULL) {
2123 assert(failure_reason != NULL, "must specify failure_reason");
2124 }
2125 }
2126 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason);
2127 if (event.should_commit()) {
2128 post_compilation_event(&event, task);
2129 }
2130
2131 } else
2132 #endif // INCLUDE_JVMCI
2133 {
2134 NoHandleMark nhm;
2135 ThreadToNativeFromVM ttn(thread);
2136
2137 ciEnv ci_env(task);
2138 if (should_break) {
2139 ci_env.set_break_at_compile(true);
2140 }
2141 if (should_log) {
2142 ci_env.set_log(thread->log());
2143 }
2144 assert(thread->env() == &ci_env, "set by ci_env");
2145 // The thread-env() field is cleared in ~CompileTaskWrapper.
2146
2147 // Cache Jvmti state
2148 ci_env.cache_jvmti_state();
2149
2150 // Cache DTrace flags
2151 ci_env.cache_dtrace_flags();
2152
2153 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2154
2155 TraceTime t1("compilation", &time);
2156 EventCompilation event;
2157
2158 if (comp == NULL) {
2159 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2160 } else {
2161 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2162 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2163 while (WhiteBox::compilation_locked) {
2164 locker.wait();
2165 }
2166 }
2167 comp->compile_method(&ci_env, target, osr_bci, directive);
2168 }
2169
2170 if (!ci_env.failing() && task->code() == NULL) {
2171 //assert(false, "compiler should always document failure");
2172 // The compiler elected, without comment, not to register a result.
2173 // Do not attempt further compilations of this method.
2174 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2175 }
2176
2177 // Copy this bit to the enclosing block:
2178 compilable = ci_env.compilable();
2179
2180 if (ci_env.failing()) {
2181 failure_reason = ci_env.failure_reason();
2182 retry_message = ci_env.retry_message();
2183 ci_env.report_failure(failure_reason);
2184 }
2185
2186 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason);
2187 if (event.should_commit()) {
2188 post_compilation_event(&event, task);
2189 }
2190 }
2191 // Remove the JNI handle block after the ciEnv destructor has run in
2192 // the previous block.
2193 pop_jni_handle_block();
2194
2195 if (failure_reason != NULL) {
2196 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2197 if (_compilation_log != NULL) {
2198 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2199 }
2200 if (PrintCompilation) {
2201 FormatBufferResource msg = retry_message != NULL ?
2202 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2203 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2204 task->print(tty, msg);
2205 }
2206 }
2207
2208 methodHandle method(thread, task->method());
2209
2210 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2211
2212 collect_statistics(thread, time, task);
2213
2214 nmethod* nm = task->code();
2215 if (nm != NULL) {
2216 nm->maybe_print_nmethod(directive);
2217 }
2218 DirectivesStack::release(directive);
2219
2220 if (PrintCompilation && PrintCompilation2) {
2221 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2222 tty->print("%4d ", compile_id); // print compilation number
2223 tty->print("%s ", (is_osr ? "%" : " "));
2224 if (task->code() != NULL) {
2225 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2226 }
2227 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2228 }
2229
2230 Log(compilation, codecache) log;
2231 if (log.is_debug()) {
2232 LogStream ls(log.debug());
2233 codecache_print(&ls, /* detailed= */ false);
2234 }
2235 if (PrintCodeCacheOnCompilation) {
2236 codecache_print(/* detailed= */ false);
2237 }
2238 // Disable compilation, if required.
2239 switch (compilable) {
2240 case ciEnv::MethodCompilable_never:
2241 if (is_osr)
2242 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2243 else
2244 method->set_not_compilable_quietly("MethodCompilable_never");
2245 break;
2246 case ciEnv::MethodCompilable_not_at_tier:
2247 if (is_osr)
2248 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2249 else
2250 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2251 break;
2252 }
2253
2254 // Note that the queued_for_compilation bits are cleared without
2255 // protection of a mutex. [They were set by the requester thread,
2256 // when adding the task to the compile queue -- at which time the
2257 // compile queue lock was held. Subsequently, we acquired the compile
2258 // queue lock to get this task off the compile queue; thus (to belabour
2259 // the point somewhat) our clearing of the bits must be occurring
2260 // only after the setting of the bits. See also 14012000 above.
2261 method->clear_queued_for_compilation();
2262 }
2263
2264 /**
2265 * The CodeCache is full. Print warning and disable compilation.
2266 * Schedule code cache cleaning so compilation can continue later.
2267 * This function needs to be called only from CodeCache::allocate(),
2268 * since we currently handle a full code cache uniformly.
2269 */
2270 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2271 UseInterpreter = true;
2272 if (UseCompiler || AlwaysCompileLoopMethods ) {
2273 if (xtty != NULL) {
2274 ResourceMark rm;
2275 stringStream s;
2276 // Dump code cache state into a buffer before locking the tty,
2277 // because log_state() will use locks causing lock conflicts.
2278 CodeCache::log_state(&s);
2279 // Lock to prevent tearing
2280 ttyLocker ttyl;
2281 xtty->begin_elem("code_cache_full");
2282 xtty->print("%s", s.as_string());
2283 xtty->stamp();
2284 xtty->end_elem();
2285 }
2286
2287 #ifndef PRODUCT
2288 if (ExitOnFullCodeCache) {
2289 codecache_print(/* detailed= */ true);
2290 before_exit(JavaThread::current());
2291 exit_globals(); // will delete tty
2292 vm_direct_exit(1);
2293 }
2294 #endif
2295 if (UseCodeCacheFlushing) {
2296 // Since code cache is full, immediately stop new compiles
2297 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2298 NMethodSweeper::log_sweep("disable_compiler");
2299 }
2300 } else {
2301 disable_compilation_forever();
2302 }
2303
2304 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2305 }
2306 }
2307
2308 // ------------------------------------------------------------------
2309 // CompileBroker::update_compile_perf_data
2310 //
2311 // Record this compilation for debugging purposes.
2312 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2313 ResourceMark rm;
2314 char* method_name = method->name()->as_C_string();
2315 char current_method[CompilerCounters::cmname_buffer_length];
2316 size_t maxLen = CompilerCounters::cmname_buffer_length;
2317
2318 const char* class_name = method->method_holder()->name()->as_C_string();
2319
2320 size_t s1len = strlen(class_name);
2321 size_t s2len = strlen(method_name);
2322
2323 // check if we need to truncate the string
2324 if (s1len + s2len + 2 > maxLen) {
2325
2326 // the strategy is to lop off the leading characters of the
2327 // class name and the trailing characters of the method name.
2328
2329 if (s2len + 2 > maxLen) {
2330 // lop of the entire class name string, let snprintf handle
2331 // truncation of the method name.
2332 class_name += s1len; // null string
2333 }
2334 else {
2335 // lop off the extra characters from the front of the class name
2336 class_name += ((s1len + s2len + 2) - maxLen);
2337 }
2338 }
2339
2340 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2341
2342 int last_compile_type = normal_compile;
2343 if (CICountOSR && is_osr) {
2344 last_compile_type = osr_compile;
2345 }
2346
2347 CompilerCounters* counters = thread->counters();
2348 counters->set_current_method(current_method);
2349 counters->set_compile_type((jlong) last_compile_type);
2350 }
2351
2352 // ------------------------------------------------------------------
2353 // CompileBroker::push_jni_handle_block
2354 //
2355 // Push on a new block of JNI handles.
2356 void CompileBroker::push_jni_handle_block() {
2357 JavaThread* thread = JavaThread::current();
2358
2359 // Allocate a new block for JNI handles.
2360 // Inlined code from jni_PushLocalFrame()
2361 JNIHandleBlock* java_handles = thread->active_handles();
2362 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2363 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2364 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2365 thread->set_active_handles(compile_handles);
2366 }
2367
2368
2369 // ------------------------------------------------------------------
2370 // CompileBroker::pop_jni_handle_block
2371 //
2372 // Pop off the current block of JNI handles.
2373 void CompileBroker::pop_jni_handle_block() {
2374 JavaThread* thread = JavaThread::current();
2375
2376 // Release our JNI handle block
2377 JNIHandleBlock* compile_handles = thread->active_handles();
2378 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2379 thread->set_active_handles(java_handles);
2380 compile_handles->set_pop_frame_link(NULL);
2381 JNIHandleBlock::release_block(compile_handles, thread); // may block
2382 }
2383
2384 // ------------------------------------------------------------------
2385 // CompileBroker::collect_statistics
2386 //
2387 // Collect statistics about the compilation.
2388
2389 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2390 bool success = task->is_success();
2391 methodHandle method (thread, task->method());
2392 uint compile_id = task->compile_id();
2393 bool is_osr = (task->osr_bci() != standard_entry_bci);
2394 nmethod* code = task->code();
2395 CompilerCounters* counters = thread->counters();
2396
2397 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2398 MutexLocker locker(CompileStatistics_lock);
2399
2400 // _perf variables are production performance counters which are
2401 // updated regardless of the setting of the CITime and CITimeEach flags
2402 //
2403
2404 // account all time, including bailouts and failures in this counter;
2405 // C1 and C2 counters are counting both successful and unsuccessful compiles
2406 _t_total_compilation.add(time);
2407
2408 if (!success) {
2409 _total_bailout_count++;
2410 if (UsePerfData) {
2411 _perf_last_failed_method->set_value(counters->current_method());
2412 _perf_last_failed_type->set_value(counters->compile_type());
2413 _perf_total_bailout_count->inc();
2414 }
2415 _t_bailedout_compilation.add(time);
2416 } else if (code == NULL) {
2417 if (UsePerfData) {
2418 _perf_last_invalidated_method->set_value(counters->current_method());
2419 _perf_last_invalidated_type->set_value(counters->compile_type());
2420 _perf_total_invalidated_count->inc();
2421 }
2422 _total_invalidated_count++;
2423 _t_invalidated_compilation.add(time);
2424 } else {
2425 // Compilation succeeded
2426
2427 // update compilation ticks - used by the implementation of
2428 // java.lang.management.CompilationMBean
2429 _perf_total_compilation->inc(time.ticks());
2430 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2431
2432 if (CITime) {
2433 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2434 if (is_osr) {
2435 _t_osr_compilation.add(time);
2436 _sum_osr_bytes_compiled += bytes_compiled;
2437 } else {
2438 _t_standard_compilation.add(time);
2439 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2440 }
2441
2442 #if INCLUDE_JVMCI
2443 AbstractCompiler* comp = compiler(task->comp_level());
2444 if (comp) {
2445 CompilerStatistics* stats = comp->stats();
2446 if (stats) {
2447 if (is_osr) {
2448 stats->_osr.update(time, bytes_compiled);
2449 } else {
2450 stats->_standard.update(time, bytes_compiled);
2451 }
2452 stats->_nmethods_size += code->total_size();
2453 stats->_nmethods_code_size += code->insts_size();
2454 } else { // if (!stats)
2455 assert(false, "Compiler statistics object must exist");
2456 }
2457 } else { // if (!comp)
2458 assert(false, "Compiler object must exist");
2459 }
2460 #endif // INCLUDE_JVMCI
2461 }
2462
2463 if (UsePerfData) {
2464 // save the name of the last method compiled
2465 _perf_last_method->set_value(counters->current_method());
2466 _perf_last_compile_type->set_value(counters->compile_type());
2467 _perf_last_compile_size->set_value(method->code_size() +
2468 task->num_inlined_bytecodes());
2469 if (is_osr) {
2470 _perf_osr_compilation->inc(time.ticks());
2471 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2472 } else {
2473 _perf_standard_compilation->inc(time.ticks());
2474 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2475 }
2476 }
2477
2478 if (CITimeEach) {
2479 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2480 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2481 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2482 }
2483
2484 // Collect counts of successful compilations
2485 _sum_nmethod_size += code->total_size();
2486 _sum_nmethod_code_size += code->insts_size();
2487 _total_compile_count++;
2488
2489 if (UsePerfData) {
2490 _perf_sum_nmethod_size->inc( code->total_size());
2491 _perf_sum_nmethod_code_size->inc(code->insts_size());
2492 _perf_total_compile_count->inc();
2493 }
2494
2495 if (is_osr) {
2496 if (UsePerfData) _perf_total_osr_compile_count->inc();
2497 _total_osr_compile_count++;
2498 } else {
2499 if (UsePerfData) _perf_total_standard_compile_count->inc();
2500 _total_standard_compile_count++;
2501 }
2502 }
2503 // set the current method for the thread to null
2504 if (UsePerfData) counters->set_current_method("");
2505 }
2506
2507 const char* CompileBroker::compiler_name(int comp_level) {
2508 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2509 if (comp == NULL) {
2510 return "no compiler";
2511 } else {
2512 return (comp->name());
2513 }
2514 }
2515
2516 #if INCLUDE_JVMCI
2517 void CompileBroker::print_times(AbstractCompiler* comp) {
2518 CompilerStatistics* stats = comp->stats();
2519 if (stats) {
2520 tty->print_cr(" %s {speed: %d bytes/s; standard: %6.3f s, %d bytes, %d methods; osr: %6.3f s, %d bytes, %d methods; nmethods_size: %d bytes; nmethods_code_size: %d bytes}",
2521 comp->name(), stats->bytes_per_second(),
2522 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2523 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2524 stats->_nmethods_size, stats->_nmethods_code_size);
2525 } else { // if (!stats)
2526 assert(false, "Compiler statistics object must exist");
2527 }
2528 comp->print_timers();
2529 }
2530 #endif // INCLUDE_JVMCI
2531
2532 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2533 #if INCLUDE_JVMCI
2534 elapsedTimer standard_compilation;
2535 elapsedTimer total_compilation;
2536 elapsedTimer osr_compilation;
2537
2538 int standard_bytes_compiled = 0;
2539 int osr_bytes_compiled = 0;
2540
2541 int standard_compile_count = 0;
2542 int osr_compile_count = 0;
2543 int total_compile_count = 0;
2544
2545 int nmethods_size = 0;
2546 int nmethods_code_size = 0;
2547 bool printedHeader = false;
2548
2549 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2550 AbstractCompiler* comp = _compilers[i];
2551 if (comp != NULL) {
2552 if (per_compiler && aggregate && !printedHeader) {
2553 printedHeader = true;
2554 tty->cr();
2555 tty->print_cr("Individual compiler times (for compiled methods only)");
2556 tty->print_cr("------------------------------------------------");
2557 tty->cr();
2558 }
2559 CompilerStatistics* stats = comp->stats();
2560
2561 if (stats) {
2562 standard_compilation.add(stats->_standard._time);
2563 osr_compilation.add(stats->_osr._time);
2564
2565 standard_bytes_compiled += stats->_standard._bytes;
2566 osr_bytes_compiled += stats->_osr._bytes;
2567
2568 standard_compile_count += stats->_standard._count;
2569 osr_compile_count += stats->_osr._count;
2570
2571 nmethods_size += stats->_nmethods_size;
2572 nmethods_code_size += stats->_nmethods_code_size;
2573 } else { // if (!stats)
2574 assert(false, "Compiler statistics object must exist");
2575 }
2576
2577 if (per_compiler) {
2578 print_times(comp);
2579 }
2580 }
2581 }
2582 total_compile_count = osr_compile_count + standard_compile_count;
2583 total_compilation.add(osr_compilation);
2584 total_compilation.add(standard_compilation);
2585
2586 // In hosted mode, print the JVMCI compiler specific counters manually.
2587 if (!UseJVMCICompiler) {
2588 JVMCICompiler::print_compilation_timers();
2589 }
2590 #else // INCLUDE_JVMCI
2591 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2592 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2593 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2594
2595 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2596 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2597
2598 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2599 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2600 int total_compile_count = CompileBroker::_total_compile_count;
2601
2602 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2603 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2604 #endif // INCLUDE_JVMCI
2605
2606 if (!aggregate) {
2607 return;
2608 }
2609 tty->cr();
2610 tty->print_cr("Accumulated compiler times");
2611 tty->print_cr("----------------------------------------------------------");
2612 //0000000000111111111122222222223333333333444444444455555555556666666666
2613 //0123456789012345678901234567890123456789012345678901234567890123456789
2614 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2615 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2616 standard_compilation.seconds(),
2617 standard_compilation.seconds() / standard_compile_count);
2618 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2619 CompileBroker::_t_bailedout_compilation.seconds(),
2620 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2621 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2622 osr_compilation.seconds(),
2623 osr_compilation.seconds() / osr_compile_count);
2624 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2625 CompileBroker::_t_invalidated_compilation.seconds(),
2626 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2627
2628 AbstractCompiler *comp = compiler(CompLevel_simple);
2629 if (comp != NULL) {
2630 tty->cr();
2631 comp->print_timers();
2632 }
2633 comp = compiler(CompLevel_full_optimization);
2634 if (comp != NULL) {
2635 tty->cr();
2636 comp->print_timers();
2637 }
2638 tty->cr();
2639 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2640 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2641 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2642 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2643 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2644 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2645 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2646 double tcs = total_compilation.seconds();
2647 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2648 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2649 tty->cr();
2650 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2651 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2652 }
2653
2654 // Print general/accumulated JIT information.
2655 void CompileBroker::print_info(outputStream *out) {
2656 if (out == NULL) out = tty;
2657 out->cr();
2658 out->print_cr("======================");
2659 out->print_cr(" General JIT info ");
2660 out->print_cr("======================");
2661 out->cr();
2662 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2663 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2664 out->cr();
2665 out->print_cr("CodeCache overview");
2666 out->print_cr("--------------------------------------------------------");
2667 out->cr();
2668 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2669 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2670 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2671 out->cr();
2672
2673 out->cr();
2674 out->print_cr("CodeCache cleaning overview");
2675 out->print_cr("--------------------------------------------------------");
2676 out->cr();
2677 NMethodSweeper::print(out);
2678 out->print_cr("--------------------------------------------------------");
2679 out->cr();
2680 }
2681
2682 // Note: tty_lock must not be held upon entry to this function.
2683 // Print functions called from herein do "micro-locking" on tty_lock.
2684 // That's a tradeoff which keeps together important blocks of output.
2685 // At the same time, continuous tty_lock hold time is kept in check,
2686 // preventing concurrently printing threads from stalling a long time.
2687 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
2688 TimeStamp ts_total;
2689 TimeStamp ts_global;
2690 TimeStamp ts;
2691
2692 bool allFun = !strcmp(function, "all");
2693 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2694 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2695 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2696 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2697 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2698 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2699 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2700 bool discard = !strcmp(function, "discard") || allFun;
2701
2702 if (out == NULL) {
2703 out = tty;
2704 }
2705
2706 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2707 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2708 out->cr();
2709 return;
2710 }
2711
2712 ts_total.update(); // record starting point
2713
2714 if (aggregate) {
2715 print_info(out);
2716 }
2717
2718 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2719 // That prevents another thread from destroying our view on the CodeHeap.
2720 // When we request individual parts of the analysis via the jcmd interface, it is possible
2721 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2722 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2723 // across user interaction.
2724 // Acquire this lock before acquiring the CodeCache_lock.
2725 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2726 // leading to an unnecessarily long hold time of the CodeCache_lock.
2727 ts.update(); // record starting point
2728 MutexLocker mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2729 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
2730
2731 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock
2732 // for the entire duration of aggregation and printing. That makes sure
2733 // we see a consistent picture and do not run into issues caused by
2734 // the CodeHeap being altered concurrently.
2735 Mutex* global_lock = allFun ? CodeCache_lock : NULL;
2736 Mutex* function_lock = allFun ? NULL : CodeCache_lock;
2737 ts_global.update(); // record starting point
2738 MutexLocker mu2(global_lock, Mutex::_no_safepoint_check_flag);
2739 if (global_lock != NULL) {
2740 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
2741 ts_global.update(); // record starting point
2742 }
2743
2744 if (aggregate) {
2745 ts.update(); // record starting point
2746 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2747 if (function_lock != NULL) {
2748 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
2749 }
2750
2751 ts.update(); // record starting point
2752 CodeCache::aggregate(out, granularity);
2753 if (function_lock != NULL) {
2754 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
2755 }
2756 }
2757
2758 if (usedSpace) CodeCache::print_usedSpace(out);
2759 if (freeSpace) CodeCache::print_freeSpace(out);
2760 if (methodCount) CodeCache::print_count(out);
2761 if (methodSpace) CodeCache::print_space(out);
2762 if (methodAge) CodeCache::print_age(out);
2763 if (methodNames) {
2764 // print_names() has shown to be sensitive to concurrent CodeHeap modifications.
2765 // Therefore, request the CodeCache_lock before calling...
2766 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2767 CodeCache::print_names(out);
2768 }
2769 if (discard) CodeCache::discard(out);
2770
2771 if (global_lock != NULL) {
2772 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
2773 }
2774 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
2775 }