1 /*
2 * Copyright (c) 1999, 2018, 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/compileBroker.hpp"
34 #include "compiler/compileLog.hpp"
35 #include "compiler/compilerOracle.hpp"
36 #include "compiler/directivesParser.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "jfr/jfrEvents.hpp"
39 #include "logging/log.hpp"
40 #include "logging/logStream.hpp"
41 #include "memory/allocation.inline.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "oops/methodData.hpp"
44 #include "oops/method.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "prims/whitebox.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/atomic.hpp"
50 #include "runtime/compilationPolicy.hpp"
51 #include "runtime/init.hpp"
52 #include "runtime/interfaceSupport.inline.hpp"
53 #include "runtime/javaCalls.hpp"
54 #include "runtime/jniHandles.inline.hpp"
55 #include "runtime/os.hpp"
56 #include "runtime/safepointVerifiers.hpp"
57 #include "runtime/sharedRuntime.hpp"
58 #include "runtime/sweeper.hpp"
59 #include "runtime/timerTrace.hpp"
60 #include "runtime/vframe.inline.hpp"
61 #include "utilities/debug.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/formatBuffer.hpp"
65 #include "utilities/macros.hpp"
66 #ifdef COMPILER1
67 #include "c1/c1_Compiler.hpp"
68 #endif
69 #if INCLUDE_JVMCI
70 #include "jvmci/jvmciCompiler.hpp"
71 #include "jvmci/jvmciRuntime.hpp"
72 #include "jvmci/jvmciJavaClasses.hpp"
73 #include "runtime/vframe.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 // Debugging information
138 int CompileBroker::_last_compile_type = no_compile;
139 int CompileBroker::_last_compile_level = CompLevel_none;
140 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
141
142 // Performance counters
143 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
144 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
145 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
146
147 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
148 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
152
153 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
154 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
155 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
156 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
157
158 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
159 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
160 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
161 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
162 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
163 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
164 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
165
166 // Timers and counters for generating statistics
167 elapsedTimer CompileBroker::_t_total_compilation;
168 elapsedTimer CompileBroker::_t_osr_compilation;
169 elapsedTimer CompileBroker::_t_standard_compilation;
170 elapsedTimer CompileBroker::_t_invalidated_compilation;
171 elapsedTimer CompileBroker::_t_bailedout_compilation;
172
173 int CompileBroker::_total_bailout_count = 0;
174 int CompileBroker::_total_invalidated_count = 0;
175 int CompileBroker::_total_compile_count = 0;
176 int CompileBroker::_total_osr_compile_count = 0;
177 int CompileBroker::_total_standard_compile_count = 0;
178 int CompileBroker::_total_compiler_stopped_count = 0;
179 int CompileBroker::_total_compiler_restarted_count = 0;
180
181 int CompileBroker::_sum_osr_bytes_compiled = 0;
182 int CompileBroker::_sum_standard_bytes_compiled = 0;
183 int CompileBroker::_sum_nmethod_size = 0;
184 int CompileBroker::_sum_nmethod_code_size = 0;
185
186 long CompileBroker::_peak_compilation_time = 0;
187
188 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
189 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
190
191
192
193 class CompilationLog : public StringEventLog {
194 public:
195 CompilationLog() : StringEventLog("Compilation events") {
196 }
197
198 void log_compile(JavaThread* thread, CompileTask* task) {
199 StringLogMessage lm;
200 stringStream sstr = lm.stream();
201 // msg.time_stamp().update_to(tty->time_stamp().ticks());
202 task->print(&sstr, NULL, true, false);
203 log(thread, "%s", (const char*)lm);
204 }
205
206 void log_nmethod(JavaThread* thread, nmethod* nm) {
207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
208 nm->compile_id(), nm->is_osr_method() ? "%" : "",
209 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
210 }
211
212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
213 StringLogMessage lm;
214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
215 if (retry_message != NULL) {
216 lm.append(" (%s)", retry_message);
217 }
218 lm.print("\n");
219 log(thread, "%s", (const char*)lm);
220 }
221
222 void log_metaspace_failure(const char* reason) {
223 ResourceMark rm;
224 StringLogMessage lm;
225 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
226 lm.print("\n");
227 log(JavaThread::current(), "%s", (const char*)lm);
228 }
229 };
230
231 static CompilationLog* _compilation_log = NULL;
232
233 bool compileBroker_init() {
234 if (LogEvents) {
235 _compilation_log = new CompilationLog();
236 }
237
238 // init directives stack, adding default directive
239 DirectivesStack::init();
240
241 if (DirectivesParser::has_file()) {
242 return DirectivesParser::parse_from_flag();
243 } else if (CompilerDirectivesPrint) {
244 // Print default directive even when no other was added
245 DirectivesStack::print(tty);
246 }
247
248 return true;
249 }
250
251 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
252 CompilerThread* thread = CompilerThread::current();
253 thread->set_task(task);
254 #if INCLUDE_JVMCI
255 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
256 task->set_jvmci_compiler_thread(thread);
257 }
258 #endif
259 CompileLog* log = thread->log();
260 if (log != NULL) task->log_task_start(log);
261 }
262
263 CompileTaskWrapper::~CompileTaskWrapper() {
264 CompilerThread* thread = CompilerThread::current();
265 CompileTask* task = thread->task();
266 CompileLog* log = thread->log();
267 if (log != NULL) task->log_task_done(log);
268 thread->set_task(NULL);
269 task->set_code_handle(NULL);
270 thread->set_env(NULL);
271 if (task->is_blocking()) {
272 bool free_task = false;
273 {
274 MutexLocker notifier(task->lock(), thread);
275 task->mark_complete();
276 #if INCLUDE_JVMCI
277 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
278 if (!task->has_waiter()) {
279 // The waiting thread timed out and thus did not free the task.
280 free_task = true;
281 }
282 task->set_jvmci_compiler_thread(NULL);
283 }
284 #endif
285 if (!free_task) {
286 // Notify the waiting thread that the compilation has completed
287 // so that it can free the task.
288 task->lock()->notify_all();
289 }
290 }
291 if (free_task) {
292 // The task can only be freed once the task lock is released.
293 CompileTask::free(task);
294 }
295 } else {
296 task->mark_complete();
297
298 // By convention, the compiling thread is responsible for
299 // recycling a non-blocking CompileTask.
300 CompileTask::free(task);
301 }
302 }
303
304 /**
305 * Check if a CompilerThread can be removed and update count if requested.
306 */
307 static bool can_remove(CompilerThread *ct, bool do_it) {
308 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
309 if (!ReduceNumberOfCompilerThreads) return false;
310
311 AbstractCompiler *compiler = ct->compiler();
312 int compiler_count = compiler->num_compiler_threads();
313 bool c1 = compiler->is_c1();
314
315 // Keep at least 1 compiler thread of each type.
316 if (compiler_count < 2) return false;
317
318 // Keep thread alive for at least some time.
319 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
320
321 // We only allow the last compiler thread of each type to get removed.
322 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1)
323 : CompileBroker::compiler2_object(compiler_count - 1);
324 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) {
325 if (do_it) {
326 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
327 compiler->set_num_compiler_threads(compiler_count - 1);
328 }
329 return true;
330 }
331 return false;
332 }
333
334 /**
335 * Add a CompileTask to a CompileQueue.
336 */
337 void CompileQueue::add(CompileTask* task) {
338 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
339
340 task->set_next(NULL);
341 task->set_prev(NULL);
342
343 if (_last == NULL) {
344 // The compile queue is empty.
345 assert(_first == NULL, "queue is empty");
346 _first = task;
347 _last = task;
348 } else {
349 // Append the task to the queue.
350 assert(_last->next() == NULL, "not last");
351 _last->set_next(task);
352 task->set_prev(_last);
353 _last = task;
354 }
355 ++_size;
356
357 // Mark the method as being in the compile queue.
358 task->method()->set_queued_for_compilation();
359
360 if (CIPrintCompileQueue) {
361 print_tty();
362 }
363
364 if (LogCompilation && xtty != NULL) {
365 task->log_task_queued();
366 }
367
368 // Notify CompilerThreads that a task is available.
369 MethodCompileQueue_lock->notify_all();
370 }
371
372 /**
373 * Empties compilation queue by putting all compilation tasks onto
374 * a freelist. Furthermore, the method wakes up all threads that are
375 * waiting on a compilation task to finish. This can happen if background
376 * compilation is disabled.
377 */
378 void CompileQueue::free_all() {
379 MutexLocker mu(MethodCompileQueue_lock);
380 CompileTask* next = _first;
381
382 // Iterate over all tasks in the compile queue
383 while (next != NULL) {
384 CompileTask* current = next;
385 next = current->next();
386 {
387 // Wake up thread that blocks on the compile task.
388 MutexLocker ct_lock(current->lock());
389 current->lock()->notify();
390 }
391 // Put the task back on the freelist.
392 CompileTask::free(current);
393 }
394 _first = NULL;
395
396 // Wake up all threads that block on the queue.
397 MethodCompileQueue_lock->notify_all();
398 }
399
400 /**
401 * Get the next CompileTask from a CompileQueue
402 */
403 CompileTask* CompileQueue::get() {
404 // save methods from RedefineClasses across safepoint
405 // across MethodCompileQueue_lock below.
406 methodHandle save_method;
407 methodHandle save_hot_method;
408
409 MutexLocker locker(MethodCompileQueue_lock);
410 // If _first is NULL we have no more compile jobs. There are two reasons for
411 // having no compile jobs: First, we compiled everything we wanted. Second,
412 // we ran out of code cache so compilation has been disabled. In the latter
413 // case we perform code cache sweeps to free memory such that we can re-enable
414 // compilation.
415 while (_first == NULL) {
416 // Exit loop if compilation is disabled forever
417 if (CompileBroker::is_compilation_disabled_forever()) {
418 return NULL;
419 }
420
421 // If there are no compilation tasks and we can compile new jobs
422 // (i.e., there is enough free space in the code cache) there is
423 // no need to invoke the sweeper. As a result, the hotness of methods
424 // remains unchanged. This behavior is desired, since we want to keep
425 // the stable state, i.e., we do not want to evict methods from the
426 // code cache if it is unnecessary.
427 // We need a timed wait here, since compiler threads can exit if compilation
428 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
429 // is not critical and we do not want idle compiler threads to wake up too often.
430 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
431
432 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
433 // Still nothing to compile. Give caller a chance to stop this thread.
434 if (can_remove(CompilerThread::current(), false)) return NULL;
435 }
436 }
437
438 if (CompileBroker::is_compilation_disabled_forever()) {
439 return NULL;
440 }
441
442 CompileTask* task;
443 {
444 NoSafepointVerifier nsv;
445 task = CompilationPolicy::policy()->select_task(this);
446 }
447
448 if (task != NULL) {
449 // Save method pointers across unlock safepoint. The task is removed from
450 // the compilation queue, which is walked during RedefineClasses.
451 save_method = methodHandle(task->method());
452 save_hot_method = methodHandle(task->hot_method());
453
454 remove(task);
455 purge_stale_tasks(); // may temporarily release MCQ lock
456 }
457
458 return task;
459 }
460
461 // Clean & deallocate stale compile tasks.
462 // Temporarily releases MethodCompileQueue lock.
463 void CompileQueue::purge_stale_tasks() {
464 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
465 if (_first_stale != NULL) {
466 // Stale tasks are purged when MCQ lock is released,
467 // but _first_stale updates are protected by MCQ lock.
468 // Once task processing starts and MCQ lock is released,
469 // other compiler threads can reuse _first_stale.
470 CompileTask* head = _first_stale;
471 _first_stale = NULL;
472 {
473 MutexUnlocker ul(MethodCompileQueue_lock);
474 for (CompileTask* task = head; task != NULL; ) {
475 CompileTask* next_task = task->next();
476 CompileTaskWrapper ctw(task); // Frees the task
477 task->set_failure_reason("stale task");
478 task = next_task;
479 }
480 }
481 }
482 }
483
484 void CompileQueue::remove(CompileTask* task) {
485 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
486 if (task->prev() != NULL) {
487 task->prev()->set_next(task->next());
488 } else {
489 // max is the first element
490 assert(task == _first, "Sanity");
491 _first = task->next();
492 }
493
494 if (task->next() != NULL) {
495 task->next()->set_prev(task->prev());
496 } else {
497 // max is the last element
498 assert(task == _last, "Sanity");
499 _last = task->prev();
500 }
501 --_size;
502 }
503
504 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
505 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
506 remove(task);
507
508 // Enqueue the task for reclamation (should be done outside MCQ lock)
509 task->set_next(_first_stale);
510 task->set_prev(NULL);
511 _first_stale = task;
512 }
513
514 // methods in the compile queue need to be marked as used on the stack
515 // so that they don't get reclaimed by Redefine Classes
516 void CompileQueue::mark_on_stack() {
517 CompileTask* task = _first;
518 while (task != NULL) {
519 task->mark_on_stack();
520 task = task->next();
521 }
522 }
523
524
525 CompileQueue* CompileBroker::compile_queue(int comp_level) {
526 if (is_c2_compile(comp_level)) return _c2_compile_queue;
527 if (is_c1_compile(comp_level)) return _c1_compile_queue;
528 return NULL;
529 }
530
531 void CompileBroker::print_compile_queues(outputStream* st) {
532 st->print_cr("Current compiles: ");
533
534 char buf[2000];
535 int buflen = sizeof(buf);
536 Threads::print_threads_compiling(st, buf, buflen);
537
538 st->cr();
539 if (_c1_compile_queue != NULL) {
540 _c1_compile_queue->print(st);
541 }
542 if (_c2_compile_queue != NULL) {
543 _c2_compile_queue->print(st);
544 }
545 }
546
547 void CompileQueue::print(outputStream* st) {
548 assert_locked_or_safepoint(MethodCompileQueue_lock);
549 st->print_cr("%s:", name());
550 CompileTask* task = _first;
551 if (task == NULL) {
552 st->print_cr("Empty");
553 } else {
554 while (task != NULL) {
555 task->print(st, NULL, true, true);
556 task = task->next();
557 }
558 }
559 st->cr();
560 }
561
562 void CompileQueue::print_tty() {
563 ttyLocker ttyl;
564 print(tty);
565 }
566
567 CompilerCounters::CompilerCounters() {
568 _current_method[0] = '\0';
569 _compile_type = CompileBroker::no_compile;
570 }
571
572 // ------------------------------------------------------------------
573 // CompileBroker::compilation_init
574 //
575 // Initialize the Compilation object
576 void CompileBroker::compilation_init_phase1(TRAPS) {
577 _last_method_compiled[0] = '\0';
578
579 // No need to initialize compilation system if we do not use it.
580 if (!UseCompiler) {
581 return;
582 }
583 // Set the interface to the current compiler(s).
584 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
585 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
586
587 #if INCLUDE_JVMCI
588 if (EnableJVMCI) {
589 // This is creating a JVMCICompiler singleton.
590 JVMCICompiler* jvmci = new JVMCICompiler();
591
592 if (UseJVMCICompiler) {
593 _compilers[1] = jvmci;
594 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
595 if (BootstrapJVMCI) {
596 // JVMCI will bootstrap so give it more threads
597 _c2_count = MIN2(32, os::active_processor_count());
598 }
599 } else {
600 _c2_count = JVMCIThreads;
601 }
602 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
603 } else {
604 _c1_count = JVMCIHostThreads;
605 }
606 }
607 }
608 #endif // INCLUDE_JVMCI
609
610 #ifdef COMPILER1
611 if (_c1_count > 0) {
612 _compilers[0] = new Compiler();
613 }
614 #endif // COMPILER1
615
616 #ifdef COMPILER2
617 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
618 if (_c2_count > 0) {
619 _compilers[1] = new C2Compiler();
620 }
621 }
622 #endif // COMPILER2
623
624 // Start the compiler thread(s) and the sweeper thread
625 init_compiler_sweeper_threads();
626 // totalTime performance counter is always created as it is required
627 // by the implementation of java.lang.management.CompilationMBean.
628 {
629 EXCEPTION_MARK;
630 _perf_total_compilation =
631 PerfDataManager::create_counter(JAVA_CI, "totalTime",
632 PerfData::U_Ticks, CHECK);
633 }
634
635 if (UsePerfData) {
636
637 EXCEPTION_MARK;
638
639 // create the jvmstat performance counters
640 _perf_osr_compilation =
641 PerfDataManager::create_counter(SUN_CI, "osrTime",
642 PerfData::U_Ticks, CHECK);
643
644 _perf_standard_compilation =
645 PerfDataManager::create_counter(SUN_CI, "standardTime",
646 PerfData::U_Ticks, CHECK);
647
648 _perf_total_bailout_count =
649 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
650 PerfData::U_Events, CHECK);
651
652 _perf_total_invalidated_count =
653 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
654 PerfData::U_Events, CHECK);
655
656 _perf_total_compile_count =
657 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
658 PerfData::U_Events, CHECK);
659 _perf_total_osr_compile_count =
660 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
661 PerfData::U_Events, CHECK);
662
663 _perf_total_standard_compile_count =
664 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
665 PerfData::U_Events, CHECK);
666
667 _perf_sum_osr_bytes_compiled =
668 PerfDataManager::create_counter(SUN_CI, "osrBytes",
669 PerfData::U_Bytes, CHECK);
670
671 _perf_sum_standard_bytes_compiled =
672 PerfDataManager::create_counter(SUN_CI, "standardBytes",
673 PerfData::U_Bytes, CHECK);
674
675 _perf_sum_nmethod_size =
676 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
677 PerfData::U_Bytes, CHECK);
678
679 _perf_sum_nmethod_code_size =
680 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
681 PerfData::U_Bytes, CHECK);
682
683 _perf_last_method =
684 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
685 CompilerCounters::cmname_buffer_length,
686 "", CHECK);
687
688 _perf_last_failed_method =
689 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
690 CompilerCounters::cmname_buffer_length,
691 "", CHECK);
692
693 _perf_last_invalidated_method =
694 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
695 CompilerCounters::cmname_buffer_length,
696 "", CHECK);
697
698 _perf_last_compile_type =
699 PerfDataManager::create_variable(SUN_CI, "lastType",
700 PerfData::U_None,
701 (jlong)CompileBroker::no_compile,
702 CHECK);
703
704 _perf_last_compile_size =
705 PerfDataManager::create_variable(SUN_CI, "lastSize",
706 PerfData::U_Bytes,
707 (jlong)CompileBroker::no_compile,
708 CHECK);
709
710
711 _perf_last_failed_type =
712 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
713 PerfData::U_None,
714 (jlong)CompileBroker::no_compile,
715 CHECK);
716
717 _perf_last_invalidated_type =
718 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
719 PerfData::U_None,
720 (jlong)CompileBroker::no_compile,
721 CHECK);
722 }
723 }
724
725 // Completes compiler initialization. Compilation requests submitted
726 // prior to this will be silently ignored.
727 void CompileBroker::compilation_init_phase2() {
728 _initialized = true;
729 }
730
731 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
732 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
733 Handle thread_group(THREAD, Universe::system_thread_group());
734 return JavaCalls::construct_new_instance(
735 SystemDictionary::Thread_klass(),
736 vmSymbols::threadgroup_string_void_signature(),
737 thread_group,
738 string,
739 CHECK_NH);
740 }
741
742
743 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue,
744 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
745 JavaThread* thread = NULL;
746 {
747 MutexLocker mu(Threads_lock, THREAD);
748 if (compiler_thread) {
749 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
750 CompilerCounters* counters = new CompilerCounters();
751 thread = new CompilerThread(queue, counters);
752 }
753 } else {
754 thread = new CodeCacheSweeperThread();
755 }
756 // At this point the new CompilerThread data-races with this startup
757 // thread (which I believe is the primoridal thread and NOT the VM
758 // thread). This means Java bytecodes being executed at startup can
759 // queue compile jobs which will run at whatever default priority the
760 // newly created CompilerThread runs at.
761
762
763 // At this point it may be possible that no osthread was created for the
764 // JavaThread due to lack of memory. We would have to throw an exception
765 // in that case. However, since this must work and we do not allow
766 // exceptions anyway, check and abort if this fails. But first release the
767 // lock.
768
769 if (thread != NULL && thread->osthread() != NULL) {
770
771 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
772
773 // Note that this only sets the JavaThread _priority field, which by
774 // definition is limited to Java priorities and not OS priorities.
775 // The os-priority is set in the CompilerThread startup code itself
776
777 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
778
779 // Note that we cannot call os::set_priority because it expects Java
780 // priorities and we are *explicitly* using OS priorities so that it's
781 // possible to set the compiler thread priority higher than any Java
782 // thread.
783
784 int native_prio = CompilerThreadPriority;
785 if (native_prio == -1) {
786 if (UseCriticalCompilerThreadPriority) {
787 native_prio = os::java_to_os_priority[CriticalPriority];
788 } else {
789 native_prio = os::java_to_os_priority[NearMaxPriority];
790 }
791 }
792 os::set_native_priority(thread, native_prio);
793
794 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
795
796 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
797 if (compiler_thread) {
798 thread->as_CompilerThread()->set_compiler(comp);
799 }
800 Threads::add(thread);
801 Thread::start(thread);
802 }
803 }
804
805 // First release lock before aborting VM.
806 if (thread == NULL || thread->osthread() == NULL) {
807 if (UseDynamicNumberOfCompilerThreads && comp->num_compiler_threads() > 0) {
808 if (thread != NULL) {
809 thread->smr_delete();
810 }
811 return NULL;
812 }
813 vm_exit_during_initialization("java.lang.OutOfMemoryError",
814 os::native_thread_creation_failed_msg());
815 }
816
817 // Let go of Threads_lock before yielding
818 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
819
820 return thread;
821 }
822
823
824 void CompileBroker::init_compiler_sweeper_threads() {
825 EXCEPTION_MARK;
826 #if !defined(ZERO)
827 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
828 #endif // !ZERO
829 // Initialize the compilation queue
830 if (_c2_count > 0) {
831 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
832 _c2_compile_queue = new CompileQueue(name);
833 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
834 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
835 }
836 if (_c1_count > 0) {
837 _c1_compile_queue = new CompileQueue("C1 compile queue");
838 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
839 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
840 }
841
842 char name_buffer[256];
843
844 for (int i = 0; i < _c2_count; i++) {
845 // Create a name for our thread.
846 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
847 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD));
848 _compiler2_objects[i] = thread_handle;
849 _compiler2_logs[i] = NULL;
850
851 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
852 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], /* compiler_thread */ true, CHECK);
853 assert(ct != NULL, "should have been handled for initial thread");
854 _compilers[1]->set_num_compiler_threads(i + 1);
855 if (TraceCompilerThreads) {
856 ResourceMark rm;
857 MutexLocker mu(Threads_lock);
858 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
859 }
860 }
861 }
862
863 for (int i = 0; i < _c1_count; i++) {
864 // Create a name for our thread.
865 sprintf(name_buffer, "C1 CompilerThread%d", i);
866 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD));
867 _compiler1_objects[i] = thread_handle;
868 _compiler1_logs[i] = NULL;
869
870 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
871 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], /* compiler_thread */ true, CHECK);
872 assert(ct != NULL, "should have been handled for initial thread");
873 _compilers[0]->set_num_compiler_threads(i + 1);
874 if (TraceCompilerThreads) {
875 ResourceMark rm;
876 MutexLocker mu(Threads_lock);
877 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
878 }
879 }
880 }
881
882 if (UsePerfData) {
883 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
884 }
885
886 if (MethodFlushing) {
887 // Initialize the sweeper thread
888 jobject thread_handle = JNIHandles::make_local(THREAD, create_thread_oop("Sweeper thread", THREAD)());
889 make_thread(thread_handle, NULL, NULL, /* compiler_thread */ false, CHECK);
890 }
891 }
892
893 void CompileBroker::possibly_add_compiler_threads() {
894 EXCEPTION_MARK;
895
896 julong available_memory = os::available_memory();
897 // Only do attempt to start additional threads if the lock is free.
898 if (!CompileThread_lock->try_lock()) return;
899
900 if (_c2_compile_queue != NULL) {
901 int old_c2_count = _compilers[1]->num_compiler_threads();
902 int new_c2_count = MIN3(_c2_count,
903 _c2_compile_queue->size() / 2,
904 (int)(available_memory / 200*M));
905
906 for (int i = old_c2_count; i < new_c2_count; i++) {
907 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], true, CHECK);
908 if (ct == NULL) break;
909 _compilers[1]->set_num_compiler_threads(i + 1);
910 if (TraceCompilerThreads) {
911 ResourceMark rm;
912 MutexLocker mu(Threads_lock);
913 tty->print_cr("Added compiler thread %s (available memory: %dMB)",
914 ct->get_thread_name(), (int)(available_memory/M));
915 }
916 }
917 }
918
919 if (_c1_compile_queue != NULL) {
920 int old_c1_count = _compilers[0]->num_compiler_threads();
921 int new_c1_count = MIN3(_c1_count,
922 _c1_compile_queue->size() / 4,
923 (int)(available_memory / 100*M));
924
925 for (int i = old_c1_count; i < new_c1_count; i++) {
926 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], true, CHECK);
927 if (ct == NULL) break;
928 _compilers[0]->set_num_compiler_threads(i + 1);
929 if (TraceCompilerThreads) {
930 ResourceMark rm;
931 MutexLocker mu(Threads_lock);
932 tty->print_cr("Added compiler thread %s (available memory: %dMB)",
933 ct->get_thread_name(), (int)(available_memory/M));
934 }
935 }
936 }
937
938 CompileThread_lock->unlock();
939 }
940
941
942 /**
943 * Set the methods on the stack as on_stack so that redefine classes doesn't
944 * reclaim them. This method is executed at a safepoint.
945 */
946 void CompileBroker::mark_on_stack() {
947 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
948 // Since we are at a safepoint, we do not need a lock to access
949 // the compile queues.
950 if (_c2_compile_queue != NULL) {
951 _c2_compile_queue->mark_on_stack();
952 }
953 if (_c1_compile_queue != NULL) {
954 _c1_compile_queue->mark_on_stack();
955 }
956 }
957
958 // ------------------------------------------------------------------
959 // CompileBroker::compile_method
960 //
961 // Request compilation of a method.
962 void CompileBroker::compile_method_base(const methodHandle& method,
963 int osr_bci,
964 int comp_level,
965 const methodHandle& hot_method,
966 int hot_count,
967 CompileTask::CompileReason compile_reason,
968 bool blocking,
969 Thread* thread) {
970 guarantee(!method->is_abstract(), "cannot compile abstract methods");
971 assert(method->method_holder()->is_instance_klass(),
972 "sanity check");
973 assert(!method->method_holder()->is_not_initialized(),
974 "method holder must be initialized");
975 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
976
977 if (CIPrintRequests) {
978 tty->print("request: ");
979 method->print_short_name(tty);
980 if (osr_bci != InvocationEntryBci) {
981 tty->print(" osr_bci: %d", osr_bci);
982 }
983 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
984 if (!hot_method.is_null()) {
985 tty->print(" hot: ");
986 if (hot_method() != method()) {
987 hot_method->print_short_name(tty);
988 } else {
989 tty->print("yes");
990 }
991 }
992 tty->cr();
993 }
994
995 // A request has been made for compilation. Before we do any
996 // real work, check to see if the method has been compiled
997 // in the meantime with a definitive result.
998 if (compilation_is_complete(method, osr_bci, comp_level)) {
999 return;
1000 }
1001
1002 #ifndef PRODUCT
1003 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1004 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1005 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1006 return;
1007 }
1008 }
1009 #endif
1010
1011 // If this method is already in the compile queue, then
1012 // we do not block the current thread.
1013 if (compilation_is_in_queue(method)) {
1014 // We may want to decay our counter a bit here to prevent
1015 // multiple denied requests for compilation. This is an
1016 // open compilation policy issue. Note: The other possibility,
1017 // in the case that this is a blocking compile request, is to have
1018 // all subsequent blocking requesters wait for completion of
1019 // ongoing compiles. Note that in this case we'll need a protocol
1020 // for freeing the associated compile tasks. [Or we could have
1021 // a single static monitor on which all these waiters sleep.]
1022 return;
1023 }
1024
1025 if (TieredCompilation) {
1026 // Tiered policy requires MethodCounters to exist before adding a method to
1027 // the queue. Create if we don't have them yet.
1028 method->get_method_counters(thread);
1029 }
1030
1031 // Outputs from the following MutexLocker block:
1032 CompileTask* task = NULL;
1033 CompileQueue* queue = compile_queue(comp_level);
1034
1035 // Acquire our lock.
1036 {
1037 MutexLocker locker(MethodCompileQueue_lock, thread);
1038
1039 // Make sure the method has not slipped into the queues since
1040 // last we checked; note that those checks were "fast bail-outs".
1041 // Here we need to be more careful, see 14012000 below.
1042 if (compilation_is_in_queue(method)) {
1043 return;
1044 }
1045
1046 // We need to check again to see if the compilation has
1047 // completed. A previous compilation may have registered
1048 // some result.
1049 if (compilation_is_complete(method, osr_bci, comp_level)) {
1050 return;
1051 }
1052
1053 // We now know that this compilation is not pending, complete,
1054 // or prohibited. Assign a compile_id to this compilation
1055 // and check to see if it is in our [Start..Stop) range.
1056 int compile_id = assign_compile_id(method, osr_bci);
1057 if (compile_id == 0) {
1058 // The compilation falls outside the allowed range.
1059 return;
1060 }
1061
1062 #if INCLUDE_JVMCI
1063 if (UseJVMCICompiler) {
1064 if (blocking) {
1065 // Don't allow blocking compiles for requests triggered by JVMCI.
1066 if (thread->is_Compiler_thread()) {
1067 blocking = false;
1068 }
1069
1070 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1071 vframeStream vfst((JavaThread*) thread);
1072 for (; !vfst.at_end(); vfst.next()) {
1073 if (vfst.method()->is_static_initializer() ||
1074 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1075 vfst.method()->name() == vmSymbols::loadClass_name())) {
1076 blocking = false;
1077 break;
1078 }
1079 }
1080
1081 // Don't allow blocking compilation requests to JVMCI
1082 // if JVMCI itself is not yet initialized
1083 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
1084 blocking = false;
1085 }
1086
1087 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1088 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1089 // such as the DestroyJavaVM thread.
1090 if (JVMCIRuntime::shutdown_called()) {
1091 blocking = false;
1092 }
1093 }
1094 }
1095 #endif // INCLUDE_JVMCI
1096
1097 // We will enter the compilation in the queue.
1098 // 14012000: Note that this sets the queued_for_compile bits in
1099 // the target method. We can now reason that a method cannot be
1100 // queued for compilation more than once, as follows:
1101 // Before a thread queues a task for compilation, it first acquires
1102 // the compile queue lock, then checks if the method's queued bits
1103 // are set or it has already been compiled. Thus there can not be two
1104 // instances of a compilation task for the same method on the
1105 // compilation queue. Consider now the case where the compilation
1106 // thread has already removed a task for that method from the queue
1107 // and is in the midst of compiling it. In this case, the
1108 // queued_for_compile bits must be set in the method (and these
1109 // will be visible to the current thread, since the bits were set
1110 // under protection of the compile queue lock, which we hold now.
1111 // When the compilation completes, the compiler thread first sets
1112 // the compilation result and then clears the queued_for_compile
1113 // bits. Neither of these actions are protected by a barrier (or done
1114 // under the protection of a lock), so the only guarantee we have
1115 // (on machines with TSO (Total Store Order)) is that these values
1116 // will update in that order. As a result, the only combinations of
1117 // these bits that the current thread will see are, in temporal order:
1118 // <RESULT, QUEUE> :
1119 // <0, 1> : in compile queue, but not yet compiled
1120 // <1, 1> : compiled but queue bit not cleared
1121 // <1, 0> : compiled and queue bit cleared
1122 // Because we first check the queue bits then check the result bits,
1123 // we are assured that we cannot introduce a duplicate task.
1124 // Note that if we did the tests in the reverse order (i.e. check
1125 // result then check queued bit), we could get the result bit before
1126 // the compilation completed, and the queue bit after the compilation
1127 // completed, and end up introducing a "duplicate" (redundant) task.
1128 // In that case, the compiler thread should first check if a method
1129 // has already been compiled before trying to compile it.
1130 // NOTE: in the event that there are multiple compiler threads and
1131 // there is de-optimization/recompilation, things will get hairy,
1132 // and in that case it's best to protect both the testing (here) of
1133 // these bits, and their updating (here and elsewhere) under a
1134 // common lock.
1135 task = create_compile_task(queue,
1136 compile_id, method,
1137 osr_bci, comp_level,
1138 hot_method, hot_count, compile_reason,
1139 blocking);
1140 }
1141
1142 if (blocking) {
1143 wait_for_completion(task);
1144 }
1145 }
1146
1147 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1148 int comp_level,
1149 const methodHandle& hot_method, int hot_count,
1150 CompileTask::CompileReason compile_reason,
1151 Thread* THREAD) {
1152 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1153 if (!_initialized || comp_level == CompLevel_none) {
1154 return NULL;
1155 }
1156
1157 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1158 assert(comp != NULL, "Ensure we have a compiler");
1159
1160 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1161 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1162 DirectivesStack::release(directive);
1163 return nm;
1164 }
1165
1166 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1167 int comp_level,
1168 const methodHandle& hot_method, int hot_count,
1169 CompileTask::CompileReason compile_reason,
1170 DirectiveSet* directive,
1171 Thread* THREAD) {
1172
1173 // make sure arguments make sense
1174 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1175 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1176 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1177 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1178 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1179 // allow any levels for WhiteBox
1180 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1181 // return quickly if possible
1182
1183 // lock, make sure that the compilation
1184 // isn't prohibited in a straightforward way.
1185 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1186 if (comp == NULL || !comp->can_compile_method(method) ||
1187 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1188 return NULL;
1189 }
1190
1191 #if INCLUDE_JVMCI
1192 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1193 return NULL;
1194 }
1195 #endif
1196
1197 if (osr_bci == InvocationEntryBci) {
1198 // standard compilation
1199 CompiledMethod* method_code = method->code();
1200 if (method_code != NULL && method_code->is_nmethod()) {
1201 if (compilation_is_complete(method, osr_bci, comp_level)) {
1202 return (nmethod*) method_code;
1203 }
1204 }
1205 if (method->is_not_compilable(comp_level)) {
1206 return NULL;
1207 }
1208 } else {
1209 // osr compilation
1210 #ifndef TIERED
1211 // seems like an assert of dubious value
1212 assert(comp_level == CompLevel_highest_tier,
1213 "all OSR compiles are assumed to be at a single compilation level");
1214 #endif // TIERED
1215 // We accept a higher level osr method
1216 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1217 if (nm != NULL) return nm;
1218 if (method->is_not_osr_compilable(comp_level)) return NULL;
1219 }
1220
1221 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1222 // some prerequisites that are compiler specific
1223 if (comp->is_c2()) {
1224 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1225 // Resolve all classes seen in the signature of the method
1226 // we are compiling.
1227 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1228 }
1229
1230 // If the method is native, do the lookup in the thread requesting
1231 // the compilation. Native lookups can load code, which is not
1232 // permitted during compilation.
1233 //
1234 // Note: A native method implies non-osr compilation which is
1235 // checked with an assertion at the entry of this method.
1236 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1237 bool in_base_library;
1238 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1239 if (HAS_PENDING_EXCEPTION) {
1240 // In case of an exception looking up the method, we just forget
1241 // about it. The interpreter will kick-in and throw the exception.
1242 method->set_not_compilable(); // implies is_not_osr_compilable()
1243 CLEAR_PENDING_EXCEPTION;
1244 return NULL;
1245 }
1246 assert(method->has_native_function(), "must have native code by now");
1247 }
1248
1249 // RedefineClasses() has replaced this method; just return
1250 if (method->is_old()) {
1251 return NULL;
1252 }
1253
1254 // JVMTI -- post_compile_event requires jmethod_id() that may require
1255 // a lock the compiling thread can not acquire. Prefetch it here.
1256 if (JvmtiExport::should_post_compiled_method_load()) {
1257 method->jmethod_id();
1258 }
1259
1260 // do the compilation
1261 if (method->is_native()) {
1262 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1263 // The following native methods:
1264 //
1265 // java.lang.Float.intBitsToFloat
1266 // java.lang.Float.floatToRawIntBits
1267 // java.lang.Double.longBitsToDouble
1268 // java.lang.Double.doubleToRawLongBits
1269 //
1270 // are called through the interpreter even if interpreter native stubs
1271 // are not preferred (i.e., calling through adapter handlers is preferred).
1272 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1273 // if the version of the methods from the native libraries is called.
1274 // As the interpreter and the C2-intrinsified version of the methods preserves
1275 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1276 if ((UseSSE >= 1 &&
1277 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1278 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1279 (UseSSE >= 2 &&
1280 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1281 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1282 return NULL;
1283 }
1284
1285 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1286 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1287 //
1288 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1289 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1290 AdapterHandlerLibrary::create_native_wrapper(method);
1291 } else {
1292 return NULL;
1293 }
1294 } else {
1295 // If the compiler is shut off due to code cache getting full
1296 // fail out now so blocking compiles dont hang the java thread
1297 if (!should_compile_new_jobs()) {
1298 CompilationPolicy::policy()->delay_compilation(method());
1299 return NULL;
1300 }
1301 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1302 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1303 }
1304
1305 // return requested nmethod
1306 // We accept a higher level osr method
1307 if (osr_bci == InvocationEntryBci) {
1308 CompiledMethod* code = method->code();
1309 if (code == NULL) {
1310 return (nmethod*) code;
1311 } else {
1312 return code->as_nmethod_or_null();
1313 }
1314 }
1315 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1316 }
1317
1318
1319 // ------------------------------------------------------------------
1320 // CompileBroker::compilation_is_complete
1321 //
1322 // See if compilation of this method is already complete.
1323 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1324 int osr_bci,
1325 int comp_level) {
1326 bool is_osr = (osr_bci != standard_entry_bci);
1327 if (is_osr) {
1328 if (method->is_not_osr_compilable(comp_level)) {
1329 return true;
1330 } else {
1331 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1332 return (result != NULL);
1333 }
1334 } else {
1335 if (method->is_not_compilable(comp_level)) {
1336 return true;
1337 } else {
1338 CompiledMethod* result = method->code();
1339 if (result == NULL) return false;
1340 return comp_level == result->comp_level();
1341 }
1342 }
1343 }
1344
1345
1346 /**
1347 * See if this compilation is already requested.
1348 *
1349 * Implementation note: there is only a single "is in queue" bit
1350 * for each method. This means that the check below is overly
1351 * conservative in the sense that an osr compilation in the queue
1352 * will block a normal compilation from entering the queue (and vice
1353 * versa). This can be remedied by a full queue search to disambiguate
1354 * cases. If it is deemed profitable, this may be done.
1355 */
1356 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1357 return method->queued_for_compilation();
1358 }
1359
1360 // ------------------------------------------------------------------
1361 // CompileBroker::compilation_is_prohibited
1362 //
1363 // See if this compilation is not allowed.
1364 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1365 bool is_native = method->is_native();
1366 // Some compilers may not support the compilation of natives.
1367 AbstractCompiler *comp = compiler(comp_level);
1368 if (is_native &&
1369 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1370 method->set_not_compilable_quietly(comp_level);
1371 return true;
1372 }
1373
1374 bool is_osr = (osr_bci != standard_entry_bci);
1375 // Some compilers may not support on stack replacement.
1376 if (is_osr &&
1377 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1378 method->set_not_osr_compilable(comp_level);
1379 return true;
1380 }
1381
1382 // The method may be explicitly excluded by the user.
1383 double scale;
1384 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1385 bool quietly = CompilerOracle::should_exclude_quietly();
1386 if (PrintCompilation && !quietly) {
1387 // This does not happen quietly...
1388 ResourceMark rm;
1389 tty->print("### Excluding %s:%s",
1390 method->is_native() ? "generation of native wrapper" : "compile",
1391 (method->is_static() ? " static" : ""));
1392 method->print_short_name(tty);
1393 tty->cr();
1394 }
1395 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1396 }
1397
1398 return false;
1399 }
1400
1401 /**
1402 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1403 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1404 * The function also allows to generate separate compilation IDs for OSR compilations.
1405 */
1406 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1407 #ifdef ASSERT
1408 bool is_osr = (osr_bci != standard_entry_bci);
1409 int id;
1410 if (method->is_native()) {
1411 assert(!is_osr, "can't be osr");
1412 // Adapters, native wrappers and method handle intrinsics
1413 // should be generated always.
1414 return Atomic::add(1, &_compilation_id);
1415 } else if (CICountOSR && is_osr) {
1416 id = Atomic::add(1, &_osr_compilation_id);
1417 if (CIStartOSR <= id && id < CIStopOSR) {
1418 return id;
1419 }
1420 } else {
1421 id = Atomic::add(1, &_compilation_id);
1422 if (CIStart <= id && id < CIStop) {
1423 return id;
1424 }
1425 }
1426
1427 // Method was not in the appropriate compilation range.
1428 method->set_not_compilable_quietly();
1429 return 0;
1430 #else
1431 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1432 // only _compilation_id is incremented.
1433 return Atomic::add(1, &_compilation_id);
1434 #endif
1435 }
1436
1437 // ------------------------------------------------------------------
1438 // CompileBroker::assign_compile_id_unlocked
1439 //
1440 // Public wrapper for assign_compile_id that acquires the needed locks
1441 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1442 MutexLocker locker(MethodCompileQueue_lock, thread);
1443 return assign_compile_id(method, osr_bci);
1444 }
1445
1446 // ------------------------------------------------------------------
1447 // CompileBroker::preload_classes
1448 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1449 // Move this code over from c1_Compiler.cpp
1450 ShouldNotReachHere();
1451 }
1452
1453
1454 // ------------------------------------------------------------------
1455 // CompileBroker::create_compile_task
1456 //
1457 // Create a CompileTask object representing the current request for
1458 // compilation. Add this task to the queue.
1459 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1460 int compile_id,
1461 const methodHandle& method,
1462 int osr_bci,
1463 int comp_level,
1464 const methodHandle& hot_method,
1465 int hot_count,
1466 CompileTask::CompileReason compile_reason,
1467 bool blocking) {
1468 CompileTask* new_task = CompileTask::allocate();
1469 new_task->initialize(compile_id, method, osr_bci, comp_level,
1470 hot_method, hot_count, compile_reason,
1471 blocking);
1472 queue->add(new_task);
1473 return new_task;
1474 }
1475
1476 #if INCLUDE_JVMCI
1477 // The number of milliseconds to wait before checking if
1478 // JVMCI compilation has made progress.
1479 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1480
1481 // The number of JVMCI compilation progress checks that must fail
1482 // before unblocking a thread waiting for a blocking compilation.
1483 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1484
1485 /**
1486 * Waits for a JVMCI compiler to complete a given task. This thread
1487 * waits until either the task completes or it sees no JVMCI compilation
1488 * progress for N consecutive milliseconds where N is
1489 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1490 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1491 *
1492 * @return true if this thread needs to free/recycle the task
1493 */
1494 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1495 MutexLocker waiter(task->lock(), thread);
1496 int progress_wait_attempts = 0;
1497 int methods_compiled = jvmci->methods_compiled();
1498 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1499 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1500 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1501
1502 bool progress;
1503 if (jvmci_compiler_thread != NULL) {
1504 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1505 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1506 !jvmci_compiler_thread->is_external_suspend();
1507 } else {
1508 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1509 // that all JVMCI compiler threads are blocked on. We use the counter for
1510 // successful JVMCI compilations to determine whether JVMCI compilation
1511 // is still making progress through the JVMCI compiler queue.
1512 progress = jvmci->methods_compiled() != methods_compiled;
1513 }
1514
1515 if (!progress) {
1516 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1517 if (PrintCompilation) {
1518 task->print(tty, "wait for blocking compilation timed out");
1519 }
1520 break;
1521 }
1522 } else {
1523 progress_wait_attempts = 0;
1524 if (jvmci_compiler_thread == NULL) {
1525 methods_compiled = jvmci->methods_compiled();
1526 }
1527 }
1528 }
1529 task->clear_waiter();
1530 return task->is_complete();
1531 }
1532 #endif
1533
1534 /**
1535 * Wait for the compilation task to complete.
1536 */
1537 void CompileBroker::wait_for_completion(CompileTask* task) {
1538 if (CIPrintCompileQueue) {
1539 ttyLocker ttyl;
1540 tty->print_cr("BLOCKING FOR COMPILE");
1541 }
1542
1543 assert(task->is_blocking(), "can only wait on blocking task");
1544
1545 JavaThread* thread = JavaThread::current();
1546 thread->set_blocked_on_compilation(true);
1547
1548 methodHandle method(thread, task->method());
1549 bool free_task;
1550 #if INCLUDE_JVMCI
1551 AbstractCompiler* comp = compiler(task->comp_level());
1552 if (comp->is_jvmci()) {
1553 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1554 } else
1555 #endif
1556 {
1557 MutexLocker waiter(task->lock(), thread);
1558 free_task = true;
1559 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1560 task->lock()->wait();
1561 }
1562 }
1563
1564 thread->set_blocked_on_compilation(false);
1565 if (free_task) {
1566 if (is_compilation_disabled_forever()) {
1567 CompileTask::free(task);
1568 return;
1569 }
1570
1571 // It is harmless to check this status without the lock, because
1572 // completion is a stable property (until the task object is recycled).
1573 assert(task->is_complete(), "Compilation should have completed");
1574 assert(task->code_handle() == NULL, "must be reset");
1575
1576 // By convention, the waiter is responsible for recycling a
1577 // blocking CompileTask. Since there is only one waiter ever
1578 // waiting on a CompileTask, we know that no one else will
1579 // be using this CompileTask; we can free it.
1580 CompileTask::free(task);
1581 }
1582 }
1583
1584 /**
1585 * Initialize compiler thread(s) + compiler object(s). The postcondition
1586 * of this function is that the compiler runtimes are initialized and that
1587 * compiler threads can start compiling.
1588 */
1589 bool CompileBroker::init_compiler_runtime() {
1590 CompilerThread* thread = CompilerThread::current();
1591 AbstractCompiler* comp = thread->compiler();
1592 // Final sanity check - the compiler object must exist
1593 guarantee(comp != NULL, "Compiler object must exist");
1594
1595 int system_dictionary_modification_counter;
1596 {
1597 MutexLocker locker(Compile_lock, thread);
1598 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1599 }
1600
1601 {
1602 // Must switch to native to allocate ci_env
1603 ThreadToNativeFromVM ttn(thread);
1604 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1605 // Cache Jvmti state
1606 ci_env.cache_jvmti_state();
1607 // Cache DTrace flags
1608 ci_env.cache_dtrace_flags();
1609
1610 // Switch back to VM state to do compiler initialization
1611 ThreadInVMfromNative tv(thread);
1612 ResetNoHandleMark rnhm;
1613
1614 // Perform per-thread and global initializations
1615 comp->initialize();
1616 }
1617
1618 if (comp->is_failed()) {
1619 disable_compilation_forever();
1620 // If compiler initialization failed, no compiler thread that is specific to a
1621 // particular compiler runtime will ever start to compile methods.
1622 shutdown_compiler_runtime(comp, thread);
1623 return false;
1624 }
1625
1626 // C1 specific check
1627 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1628 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1629 return false;
1630 }
1631
1632 return true;
1633 }
1634
1635 /**
1636 * If C1 and/or C2 initialization failed, we shut down all compilation.
1637 * We do this to keep things simple. This can be changed if it ever turns
1638 * out to be a problem.
1639 */
1640 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1641 // Free buffer blob, if allocated
1642 if (thread->get_buffer_blob() != NULL) {
1643 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1644 CodeCache::free(thread->get_buffer_blob());
1645 }
1646
1647 if (comp->should_perform_shutdown()) {
1648 // There are two reasons for shutting down the compiler
1649 // 1) compiler runtime initialization failed
1650 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1651 warning("%s initialization failed. Shutting down all compilers", comp->name());
1652
1653 // Only one thread per compiler runtime object enters here
1654 // Set state to shut down
1655 comp->set_shut_down();
1656
1657 // Delete all queued compilation tasks to make compiler threads exit faster.
1658 if (_c1_compile_queue != NULL) {
1659 _c1_compile_queue->free_all();
1660 }
1661
1662 if (_c2_compile_queue != NULL) {
1663 _c2_compile_queue->free_all();
1664 }
1665
1666 // Set flags so that we continue execution with using interpreter only.
1667 UseCompiler = false;
1668 UseInterpreter = true;
1669
1670 // We could delete compiler runtimes also. However, there are references to
1671 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1672 // fail. This can be done later if necessary.
1673 }
1674 }
1675
1676 /**
1677 * Helper function to create new or reuse old CompileLog.
1678 */
1679 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1680 if (!LogCompilation) return NULL;
1681
1682 AbstractCompiler *compiler = ct->compiler();
1683 bool c1 = compiler->is_c1();
1684 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1685 assert(compiler_objects != NULL, "must be initialized at this point");
1686 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1687 assert(logs != NULL, "must be initialized at this point");
1688 int count = c1 ? _c1_count : _c2_count;
1689
1690 // Find Compiler number by its threadObj.
1691 oop compiler_obj = ct->threadObj();
1692 int compiler_number = 0;
1693 bool found = false;
1694 for (; compiler_number < count; compiler_number++) {
1695 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) {
1696 found = true;
1697 break;
1698 }
1699 }
1700 assert(found, "Compiler must exist at this point");
1701
1702 // Determine pointer for this thread's log.
1703 CompileLog** log_ptr = &logs[compiler_number];
1704
1705 // Return old one if it exists.
1706 CompileLog* log = *log_ptr;
1707 if (log != NULL) {
1708 ct->init_log(log);
1709 return log;
1710 }
1711
1712 // Create a new one and remember it.
1713 init_compiler_thread_log();
1714 log = ct->log();
1715 *log_ptr = log;
1716 return log;
1717 }
1718
1719 // ------------------------------------------------------------------
1720 // CompileBroker::compiler_thread_loop
1721 //
1722 // The main loop run by a CompilerThread.
1723 void CompileBroker::compiler_thread_loop() {
1724 CompilerThread* thread = CompilerThread::current();
1725 CompileQueue* queue = thread->queue();
1726 // For the thread that initializes the ciObjectFactory
1727 // this resource mark holds all the shared objects
1728 ResourceMark rm;
1729
1730 // First thread to get here will initialize the compiler interface
1731
1732 {
1733 ASSERT_IN_VM;
1734 MutexLocker only_one (CompileThread_lock, thread);
1735 if (!ciObjectFactory::is_initialized()) {
1736 ciObjectFactory::initialize();
1737 }
1738 }
1739
1740 // Open a log.
1741 CompileLog* log = get_log(thread);
1742 if (log != NULL) {
1743 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1744 thread->name(),
1745 os::current_thread_id(),
1746 os::current_process_id());
1747 log->stamp();
1748 log->end_elem();
1749 }
1750
1751 // If compiler thread/runtime initialization fails, exit the compiler thread
1752 if (!init_compiler_runtime()) {
1753 return;
1754 }
1755
1756 thread->start_idle_timer();
1757
1758 // Poll for new compilation tasks as long as the JVM runs. Compilation
1759 // should only be disabled if something went wrong while initializing the
1760 // compiler runtimes. This, in turn, should not happen. The only known case
1761 // when compiler runtime initialization fails is if there is not enough free
1762 // space in the code cache to generate the necessary stubs, etc.
1763 while (!is_compilation_disabled_forever()) {
1764 // We need this HandleMark to avoid leaking VM handles.
1765 HandleMark hm(thread);
1766
1767 CompileTask* task = queue->get();
1768 if (task == NULL) {
1769 if (UseDynamicNumberOfCompilerThreads) {
1770 // Access compiler_count under lock to enforce consistency.
1771 MutexLocker only_one(CompileThread_lock);
1772 if (can_remove(thread, true)) {
1773 if (TraceCompilerThreads) {
1774 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1775 thread->name(), thread->idle_time_millis());
1776 }
1777 // Free buffer blob, if allocated
1778 if (thread->get_buffer_blob() != NULL) {
1779 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1780 CodeCache::free(thread->get_buffer_blob());
1781 }
1782 return; // Stop this thread.
1783 }
1784 }
1785 } else {
1786 // Assign the task to the current thread. Mark this compilation
1787 // thread as active for the profiler.
1788 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1789 // occurs after fetching the compile task off the queue.
1790 CompileTaskWrapper ctw(task);
1791 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1792 task->set_code_handle(&result_handle);
1793 methodHandle method(thread, task->method());
1794
1795 // Never compile a method if breakpoints are present in it
1796 if (method()->number_of_breakpoints() == 0) {
1797 // Compile the method.
1798 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1799 invoke_compiler_on_method(task);
1800 thread->start_idle_timer();
1801 } else {
1802 // After compilation is disabled, remove remaining methods from queue
1803 method->clear_queued_for_compilation();
1804 task->set_failure_reason("compilation is disabled");
1805 }
1806 }
1807
1808 if (UseDynamicNumberOfCompilerThreads) {
1809 possibly_add_compiler_threads();
1810 }
1811 }
1812 }
1813
1814 // Shut down compiler runtime
1815 shutdown_compiler_runtime(thread->compiler(), thread);
1816 }
1817
1818 // ------------------------------------------------------------------
1819 // CompileBroker::init_compiler_thread_log
1820 //
1821 // Set up state required by +LogCompilation.
1822 void CompileBroker::init_compiler_thread_log() {
1823 CompilerThread* thread = CompilerThread::current();
1824 char file_name[4*K];
1825 FILE* fp = NULL;
1826 intx thread_id = os::current_thread_id();
1827 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1828 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1829 if (dir == NULL) {
1830 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1831 thread_id, os::current_process_id());
1832 } else {
1833 jio_snprintf(file_name, sizeof(file_name),
1834 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1835 os::file_separator(), thread_id, os::current_process_id());
1836 }
1837
1838 fp = fopen(file_name, "wt");
1839 if (fp != NULL) {
1840 if (LogCompilation && Verbose) {
1841 tty->print_cr("Opening compilation log %s", file_name);
1842 }
1843 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1844 if (log == NULL) {
1845 fclose(fp);
1846 return;
1847 }
1848 thread->init_log(log);
1849
1850 if (xtty != NULL) {
1851 ttyLocker ttyl;
1852 // Record any per thread log files
1853 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1854 }
1855 return;
1856 }
1857 }
1858 warning("Cannot open log file: %s", file_name);
1859 }
1860
1861 void CompileBroker::log_metaspace_failure() {
1862 const char* message = "some methods may not be compiled because metaspace "
1863 "is out of memory";
1864 if (_compilation_log != NULL) {
1865 _compilation_log->log_metaspace_failure(message);
1866 }
1867 if (PrintCompilation) {
1868 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1869 }
1870 }
1871
1872
1873 // ------------------------------------------------------------------
1874 // CompileBroker::set_should_block
1875 //
1876 // Set _should_block.
1877 // Call this from the VM, with Threads_lock held and a safepoint requested.
1878 void CompileBroker::set_should_block() {
1879 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1880 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1881 #ifndef PRODUCT
1882 if (PrintCompilation && (Verbose || WizardMode))
1883 tty->print_cr("notifying compiler thread pool to block");
1884 #endif
1885 _should_block = true;
1886 }
1887
1888 // ------------------------------------------------------------------
1889 // CompileBroker::maybe_block
1890 //
1891 // Call this from the compiler at convenient points, to poll for _should_block.
1892 void CompileBroker::maybe_block() {
1893 if (_should_block) {
1894 #ifndef PRODUCT
1895 if (PrintCompilation && (Verbose || WizardMode))
1896 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1897 #endif
1898 ThreadInVMfromNative tivfn(JavaThread::current());
1899 }
1900 }
1901
1902 // wrapper for CodeCache::print_summary()
1903 static void codecache_print(bool detailed)
1904 {
1905 ResourceMark rm;
1906 stringStream s;
1907 // Dump code cache into a buffer before locking the tty,
1908 {
1909 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1910 CodeCache::print_summary(&s, detailed);
1911 }
1912 ttyLocker ttyl;
1913 tty->print("%s", s.as_string());
1914 }
1915
1916 // wrapper for CodeCache::print_summary() using outputStream
1917 static void codecache_print(outputStream* out, bool detailed) {
1918 ResourceMark rm;
1919 stringStream s;
1920
1921 // Dump code cache into a buffer
1922 {
1923 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1924 CodeCache::print_summary(&s, detailed);
1925 }
1926
1927 char* remaining_log = s.as_string();
1928 while (*remaining_log != '\0') {
1929 char* eol = strchr(remaining_log, '\n');
1930 if (eol == NULL) {
1931 out->print_cr("%s", remaining_log);
1932 remaining_log = remaining_log + strlen(remaining_log);
1933 } else {
1934 *eol = '\0';
1935 out->print_cr("%s", remaining_log);
1936 remaining_log = eol + 1;
1937 }
1938 }
1939 }
1940
1941 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env) {
1942 if (success) {
1943 task->mark_success();
1944 if (ci_env != NULL) {
1945 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1946 }
1947 if (_compilation_log != NULL) {
1948 nmethod* code = task->code();
1949 if (code != NULL) {
1950 _compilation_log->log_nmethod(thread, code);
1951 }
1952 }
1953 }
1954 // simulate crash during compilation
1955 assert(task->compile_id() != CICrashAt, "just as planned");
1956 }
1957
1958 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
1959 assert(event != NULL, "invariant");
1960 assert(event->should_commit(), "invariant");
1961 event->set_method(task->method());
1962 event->set_compileId(task->compile_id());
1963 event->set_compileLevel(task->comp_level());
1964 event->set_succeded(task->is_success());
1965 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1966 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1967 event->set_inlinedBytes(task->num_inlined_bytecodes());
1968 event->commit();
1969 }
1970
1971 int DirectivesStack::_depth = 0;
1972 CompilerDirectives* DirectivesStack::_top = NULL;
1973 CompilerDirectives* DirectivesStack::_bottom = NULL;
1974
1975 // ------------------------------------------------------------------
1976 // CompileBroker::invoke_compiler_on_method
1977 //
1978 // Compile a method.
1979 //
1980 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1981 task->print_ul();
1982 if (PrintCompilation) {
1983 ResourceMark rm;
1984 task->print_tty();
1985 }
1986 elapsedTimer time;
1987
1988 CompilerThread* thread = CompilerThread::current();
1989 ResourceMark rm(thread);
1990
1991 if (LogEvents) {
1992 _compilation_log->log_compile(thread, task);
1993 }
1994
1995 // Common flags.
1996 uint compile_id = task->compile_id();
1997 int osr_bci = task->osr_bci();
1998 bool is_osr = (osr_bci != standard_entry_bci);
1999 bool should_log = (thread->log() != NULL);
2000 bool should_break = false;
2001 const int task_level = task->comp_level();
2002 AbstractCompiler* comp = task->compiler();
2003
2004 DirectiveSet* directive;
2005 {
2006 // create the handle inside it's own block so it can't
2007 // accidentally be referenced once the thread transitions to
2008 // native. The NoHandleMark before the transition should catch
2009 // any cases where this occurs in the future.
2010 methodHandle method(thread, task->method());
2011 assert(!method->is_native(), "no longer compile natives");
2012
2013 // Look up matching directives
2014 directive = DirectivesStack::getMatchingDirective(method, comp);
2015
2016 // Save information about this method in case of failure.
2017 set_last_compile(thread, method, is_osr, task_level);
2018
2019 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2020 }
2021
2022 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2023 if (should_log && !directive->LogOption) {
2024 should_log = false;
2025 }
2026
2027 // Allocate a new set of JNI handles.
2028 push_jni_handle_block();
2029 Method* target_handle = task->method();
2030 int compilable = ciEnv::MethodCompilable;
2031 const char* failure_reason = NULL;
2032 const char* retry_message = NULL;
2033
2034 int system_dictionary_modification_counter;
2035 {
2036 MutexLocker locker(Compile_lock, thread);
2037 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
2038 }
2039
2040 #if INCLUDE_JVMCI
2041 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2042 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2043
2044 TraceTime t1("compilation", &time);
2045 EventCompilation event;
2046
2047 // Skip redefined methods
2048 if (target_handle->is_old()) {
2049 failure_reason = "redefined method";
2050 retry_message = "not retryable";
2051 compilable = ciEnv::MethodCompilable_never;
2052 } else {
2053 JVMCIEnv env(task, system_dictionary_modification_counter);
2054 methodHandle method(thread, target_handle);
2055 jvmci->compile_method(method, osr_bci, &env);
2056
2057 failure_reason = env.failure_reason();
2058 if (!env.retryable()) {
2059 retry_message = "not retryable";
2060 compilable = ciEnv::MethodCompilable_not_at_tier;
2061 }
2062 }
2063 post_compile(thread, task, task->code() != NULL, NULL);
2064 if (event.should_commit()) {
2065 post_compilation_event(&event, task);
2066 }
2067
2068 } else
2069 #endif // INCLUDE_JVMCI
2070 {
2071 NoHandleMark nhm;
2072 ThreadToNativeFromVM ttn(thread);
2073
2074 ciEnv ci_env(task, system_dictionary_modification_counter);
2075 if (should_break) {
2076 ci_env.set_break_at_compile(true);
2077 }
2078 if (should_log) {
2079 ci_env.set_log(thread->log());
2080 }
2081 assert(thread->env() == &ci_env, "set by ci_env");
2082 // The thread-env() field is cleared in ~CompileTaskWrapper.
2083
2084 // Cache Jvmti state
2085 ci_env.cache_jvmti_state();
2086
2087 // Cache DTrace flags
2088 ci_env.cache_dtrace_flags();
2089
2090 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2091
2092 TraceTime t1("compilation", &time);
2093 EventCompilation event;
2094
2095 if (comp == NULL) {
2096 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2097 } else {
2098 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2099 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2100 while (WhiteBox::compilation_locked) {
2101 locker.wait(Mutex::_no_safepoint_check_flag);
2102 }
2103 }
2104 comp->compile_method(&ci_env, target, osr_bci, directive);
2105 }
2106
2107 if (!ci_env.failing() && task->code() == NULL) {
2108 //assert(false, "compiler should always document failure");
2109 // The compiler elected, without comment, not to register a result.
2110 // Do not attempt further compilations of this method.
2111 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2112 }
2113
2114 // Copy this bit to the enclosing block:
2115 compilable = ci_env.compilable();
2116
2117 if (ci_env.failing()) {
2118 failure_reason = ci_env.failure_reason();
2119 retry_message = ci_env.retry_message();
2120 ci_env.report_failure(failure_reason);
2121 }
2122
2123 post_compile(thread, task, !ci_env.failing(), &ci_env);
2124 if (event.should_commit()) {
2125 post_compilation_event(&event, task);
2126 }
2127 }
2128 // Remove the JNI handle block after the ciEnv destructor has run in
2129 // the previous block.
2130 pop_jni_handle_block();
2131
2132 if (failure_reason != NULL) {
2133 task->set_failure_reason(failure_reason);
2134 if (_compilation_log != NULL) {
2135 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2136 }
2137 if (PrintCompilation) {
2138 FormatBufferResource msg = retry_message != NULL ?
2139 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2140 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2141 task->print(tty, msg);
2142 }
2143 }
2144
2145 methodHandle method(thread, task->method());
2146
2147 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2148
2149 collect_statistics(thread, time, task);
2150
2151 nmethod* nm = task->code();
2152 if (nm != NULL) {
2153 nm->maybe_print_nmethod(directive);
2154 }
2155 DirectivesStack::release(directive);
2156
2157 if (PrintCompilation && PrintCompilation2) {
2158 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2159 tty->print("%4d ", compile_id); // print compilation number
2160 tty->print("%s ", (is_osr ? "%" : " "));
2161 if (task->code() != NULL) {
2162 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2163 }
2164 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2165 }
2166
2167 Log(compilation, codecache) log;
2168 if (log.is_debug()) {
2169 LogStream ls(log.debug());
2170 codecache_print(&ls, /* detailed= */ false);
2171 }
2172 if (PrintCodeCacheOnCompilation) {
2173 codecache_print(/* detailed= */ false);
2174 }
2175 // Disable compilation, if required.
2176 switch (compilable) {
2177 case ciEnv::MethodCompilable_never:
2178 if (is_osr)
2179 method->set_not_osr_compilable_quietly();
2180 else
2181 method->set_not_compilable_quietly();
2182 break;
2183 case ciEnv::MethodCompilable_not_at_tier:
2184 if (is_osr)
2185 method->set_not_osr_compilable_quietly(task_level);
2186 else
2187 method->set_not_compilable_quietly(task_level);
2188 break;
2189 }
2190
2191 // Note that the queued_for_compilation bits are cleared without
2192 // protection of a mutex. [They were set by the requester thread,
2193 // when adding the task to the compile queue -- at which time the
2194 // compile queue lock was held. Subsequently, we acquired the compile
2195 // queue lock to get this task off the compile queue; thus (to belabour
2196 // the point somewhat) our clearing of the bits must be occurring
2197 // only after the setting of the bits. See also 14012000 above.
2198 method->clear_queued_for_compilation();
2199
2200 #ifdef ASSERT
2201 if (CollectedHeap::fired_fake_oom()) {
2202 // The current compile received a fake OOM during compilation so
2203 // go ahead and exit the VM since the test apparently succeeded
2204 tty->print_cr("*** Shutting down VM after successful fake OOM");
2205 vm_exit(0);
2206 }
2207 #endif
2208 }
2209
2210 /**
2211 * The CodeCache is full. Print warning and disable compilation.
2212 * Schedule code cache cleaning so compilation can continue later.
2213 * This function needs to be called only from CodeCache::allocate(),
2214 * since we currently handle a full code cache uniformly.
2215 */
2216 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2217 UseInterpreter = true;
2218 if (UseCompiler || AlwaysCompileLoopMethods ) {
2219 if (xtty != NULL) {
2220 ResourceMark rm;
2221 stringStream s;
2222 // Dump code cache state into a buffer before locking the tty,
2223 // because log_state() will use locks causing lock conflicts.
2224 CodeCache::log_state(&s);
2225 // Lock to prevent tearing
2226 ttyLocker ttyl;
2227 xtty->begin_elem("code_cache_full");
2228 xtty->print("%s", s.as_string());
2229 xtty->stamp();
2230 xtty->end_elem();
2231 }
2232
2233 #ifndef PRODUCT
2234 if (CompileTheWorld || ExitOnFullCodeCache) {
2235 codecache_print(/* detailed= */ true);
2236 before_exit(JavaThread::current());
2237 exit_globals(); // will delete tty
2238 vm_direct_exit(CompileTheWorld ? 0 : 1);
2239 }
2240 #endif
2241 if (UseCodeCacheFlushing) {
2242 // Since code cache is full, immediately stop new compiles
2243 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2244 NMethodSweeper::log_sweep("disable_compiler");
2245 }
2246 } else {
2247 disable_compilation_forever();
2248 }
2249
2250 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2251 }
2252 }
2253
2254 // ------------------------------------------------------------------
2255 // CompileBroker::set_last_compile
2256 //
2257 // Record this compilation for debugging purposes.
2258 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2259 ResourceMark rm;
2260 char* method_name = method->name()->as_C_string();
2261 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2262 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2263 char current_method[CompilerCounters::cmname_buffer_length];
2264 size_t maxLen = CompilerCounters::cmname_buffer_length;
2265
2266 if (UsePerfData) {
2267 const char* class_name = method->method_holder()->name()->as_C_string();
2268
2269 size_t s1len = strlen(class_name);
2270 size_t s2len = strlen(method_name);
2271
2272 // check if we need to truncate the string
2273 if (s1len + s2len + 2 > maxLen) {
2274
2275 // the strategy is to lop off the leading characters of the
2276 // class name and the trailing characters of the method name.
2277
2278 if (s2len + 2 > maxLen) {
2279 // lop of the entire class name string, let snprintf handle
2280 // truncation of the method name.
2281 class_name += s1len; // null string
2282 }
2283 else {
2284 // lop off the extra characters from the front of the class name
2285 class_name += ((s1len + s2len + 2) - maxLen);
2286 }
2287 }
2288
2289 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2290 }
2291
2292 if (CICountOSR && is_osr) {
2293 _last_compile_type = osr_compile;
2294 } else {
2295 _last_compile_type = normal_compile;
2296 }
2297 _last_compile_level = comp_level;
2298
2299 if (UsePerfData) {
2300 CompilerCounters* counters = thread->counters();
2301 counters->set_current_method(current_method);
2302 counters->set_compile_type((jlong)_last_compile_type);
2303 }
2304 }
2305
2306
2307 // ------------------------------------------------------------------
2308 // CompileBroker::push_jni_handle_block
2309 //
2310 // Push on a new block of JNI handles.
2311 void CompileBroker::push_jni_handle_block() {
2312 JavaThread* thread = JavaThread::current();
2313
2314 // Allocate a new block for JNI handles.
2315 // Inlined code from jni_PushLocalFrame()
2316 JNIHandleBlock* java_handles = thread->active_handles();
2317 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2318 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2319 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2320 thread->set_active_handles(compile_handles);
2321 }
2322
2323
2324 // ------------------------------------------------------------------
2325 // CompileBroker::pop_jni_handle_block
2326 //
2327 // Pop off the current block of JNI handles.
2328 void CompileBroker::pop_jni_handle_block() {
2329 JavaThread* thread = JavaThread::current();
2330
2331 // Release our JNI handle block
2332 JNIHandleBlock* compile_handles = thread->active_handles();
2333 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2334 thread->set_active_handles(java_handles);
2335 compile_handles->set_pop_frame_link(NULL);
2336 JNIHandleBlock::release_block(compile_handles, thread); // may block
2337 }
2338
2339 // ------------------------------------------------------------------
2340 // CompileBroker::collect_statistics
2341 //
2342 // Collect statistics about the compilation.
2343
2344 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2345 bool success = task->is_success();
2346 methodHandle method (thread, task->method());
2347 uint compile_id = task->compile_id();
2348 bool is_osr = (task->osr_bci() != standard_entry_bci);
2349 nmethod* code = task->code();
2350 CompilerCounters* counters = thread->counters();
2351
2352 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2353 MutexLocker locker(CompileStatistics_lock);
2354
2355 // _perf variables are production performance counters which are
2356 // updated regardless of the setting of the CITime and CITimeEach flags
2357 //
2358
2359 // account all time, including bailouts and failures in this counter;
2360 // C1 and C2 counters are counting both successful and unsuccessful compiles
2361 _t_total_compilation.add(time);
2362
2363 if (!success) {
2364 _total_bailout_count++;
2365 if (UsePerfData) {
2366 _perf_last_failed_method->set_value(counters->current_method());
2367 _perf_last_failed_type->set_value(counters->compile_type());
2368 _perf_total_bailout_count->inc();
2369 }
2370 _t_bailedout_compilation.add(time);
2371 } else if (code == NULL) {
2372 if (UsePerfData) {
2373 _perf_last_invalidated_method->set_value(counters->current_method());
2374 _perf_last_invalidated_type->set_value(counters->compile_type());
2375 _perf_total_invalidated_count->inc();
2376 }
2377 _total_invalidated_count++;
2378 _t_invalidated_compilation.add(time);
2379 } else {
2380 // Compilation succeeded
2381
2382 // update compilation ticks - used by the implementation of
2383 // java.lang.management.CompilationMBean
2384 _perf_total_compilation->inc(time.ticks());
2385 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2386
2387 if (CITime) {
2388 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2389 if (is_osr) {
2390 _t_osr_compilation.add(time);
2391 _sum_osr_bytes_compiled += bytes_compiled;
2392 } else {
2393 _t_standard_compilation.add(time);
2394 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2395 }
2396
2397 #if INCLUDE_JVMCI
2398 AbstractCompiler* comp = compiler(task->comp_level());
2399 if (comp) {
2400 CompilerStatistics* stats = comp->stats();
2401 if (stats) {
2402 if (is_osr) {
2403 stats->_osr.update(time, bytes_compiled);
2404 } else {
2405 stats->_standard.update(time, bytes_compiled);
2406 }
2407 stats->_nmethods_size += code->total_size();
2408 stats->_nmethods_code_size += code->insts_size();
2409 } else { // if (!stats)
2410 assert(false, "Compiler statistics object must exist");
2411 }
2412 } else { // if (!comp)
2413 assert(false, "Compiler object must exist");
2414 }
2415 #endif // INCLUDE_JVMCI
2416 }
2417
2418 if (UsePerfData) {
2419 // save the name of the last method compiled
2420 _perf_last_method->set_value(counters->current_method());
2421 _perf_last_compile_type->set_value(counters->compile_type());
2422 _perf_last_compile_size->set_value(method->code_size() +
2423 task->num_inlined_bytecodes());
2424 if (is_osr) {
2425 _perf_osr_compilation->inc(time.ticks());
2426 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2427 } else {
2428 _perf_standard_compilation->inc(time.ticks());
2429 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2430 }
2431 }
2432
2433 if (CITimeEach) {
2434 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2435 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2436 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2437 }
2438
2439 // Collect counts of successful compilations
2440 _sum_nmethod_size += code->total_size();
2441 _sum_nmethod_code_size += code->insts_size();
2442 _total_compile_count++;
2443
2444 if (UsePerfData) {
2445 _perf_sum_nmethod_size->inc( code->total_size());
2446 _perf_sum_nmethod_code_size->inc(code->insts_size());
2447 _perf_total_compile_count->inc();
2448 }
2449
2450 if (is_osr) {
2451 if (UsePerfData) _perf_total_osr_compile_count->inc();
2452 _total_osr_compile_count++;
2453 } else {
2454 if (UsePerfData) _perf_total_standard_compile_count->inc();
2455 _total_standard_compile_count++;
2456 }
2457 }
2458 // set the current method for the thread to null
2459 if (UsePerfData) counters->set_current_method("");
2460 }
2461
2462 const char* CompileBroker::compiler_name(int comp_level) {
2463 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2464 if (comp == NULL) {
2465 return "no compiler";
2466 } else {
2467 return (comp->name());
2468 }
2469 }
2470
2471 #if INCLUDE_JVMCI
2472 void CompileBroker::print_times(AbstractCompiler* comp) {
2473 CompilerStatistics* stats = comp->stats();
2474 if (stats) {
2475 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}",
2476 comp->name(), stats->bytes_per_second(),
2477 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2478 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2479 stats->_nmethods_size, stats->_nmethods_code_size);
2480 } else { // if (!stats)
2481 assert(false, "Compiler statistics object must exist");
2482 }
2483 comp->print_timers();
2484 }
2485 #endif // INCLUDE_JVMCI
2486
2487 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2488 #if INCLUDE_JVMCI
2489 elapsedTimer standard_compilation;
2490 elapsedTimer total_compilation;
2491 elapsedTimer osr_compilation;
2492
2493 int standard_bytes_compiled = 0;
2494 int osr_bytes_compiled = 0;
2495
2496 int standard_compile_count = 0;
2497 int osr_compile_count = 0;
2498 int total_compile_count = 0;
2499
2500 int nmethods_size = 0;
2501 int nmethods_code_size = 0;
2502 bool printedHeader = false;
2503
2504 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2505 AbstractCompiler* comp = _compilers[i];
2506 if (comp != NULL) {
2507 if (per_compiler && aggregate && !printedHeader) {
2508 printedHeader = true;
2509 tty->cr();
2510 tty->print_cr("Individual compiler times (for compiled methods only)");
2511 tty->print_cr("------------------------------------------------");
2512 tty->cr();
2513 }
2514 CompilerStatistics* stats = comp->stats();
2515
2516 if (stats) {
2517 standard_compilation.add(stats->_standard._time);
2518 osr_compilation.add(stats->_osr._time);
2519
2520 standard_bytes_compiled += stats->_standard._bytes;
2521 osr_bytes_compiled += stats->_osr._bytes;
2522
2523 standard_compile_count += stats->_standard._count;
2524 osr_compile_count += stats->_osr._count;
2525
2526 nmethods_size += stats->_nmethods_size;
2527 nmethods_code_size += stats->_nmethods_code_size;
2528 } else { // if (!stats)
2529 assert(false, "Compiler statistics object must exist");
2530 }
2531
2532 if (per_compiler) {
2533 print_times(comp);
2534 }
2535 }
2536 }
2537 total_compile_count = osr_compile_count + standard_compile_count;
2538 total_compilation.add(osr_compilation);
2539 total_compilation.add(standard_compilation);
2540
2541 // In hosted mode, print the JVMCI compiler specific counters manually.
2542 if (!UseJVMCICompiler) {
2543 JVMCICompiler::print_compilation_timers();
2544 }
2545 #else // INCLUDE_JVMCI
2546 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2547 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2548 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2549
2550 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2551 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2552
2553 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2554 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2555 int total_compile_count = CompileBroker::_total_compile_count;
2556
2557 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2558 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2559 #endif // INCLUDE_JVMCI
2560
2561 if (!aggregate) {
2562 return;
2563 }
2564 tty->cr();
2565 tty->print_cr("Accumulated compiler times");
2566 tty->print_cr("----------------------------------------------------------");
2567 //0000000000111111111122222222223333333333444444444455555555556666666666
2568 //0123456789012345678901234567890123456789012345678901234567890123456789
2569 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2570 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2571 standard_compilation.seconds(),
2572 standard_compilation.seconds() / standard_compile_count);
2573 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2574 CompileBroker::_t_bailedout_compilation.seconds(),
2575 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2576 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2577 osr_compilation.seconds(),
2578 osr_compilation.seconds() / osr_compile_count);
2579 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2580 CompileBroker::_t_invalidated_compilation.seconds(),
2581 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2582
2583 AbstractCompiler *comp = compiler(CompLevel_simple);
2584 if (comp != NULL) {
2585 tty->cr();
2586 comp->print_timers();
2587 }
2588 comp = compiler(CompLevel_full_optimization);
2589 if (comp != NULL) {
2590 tty->cr();
2591 comp->print_timers();
2592 }
2593 tty->cr();
2594 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2595 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2596 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2597 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2598 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2599 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2600 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2601 double tcs = total_compilation.seconds();
2602 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2603 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2604 tty->cr();
2605 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2606 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2607 }
2608
2609 // Debugging output for failure
2610 void CompileBroker::print_last_compile() {
2611 if (_last_compile_level != CompLevel_none &&
2612 compiler(_last_compile_level) != NULL &&
2613 _last_compile_type != no_compile) {
2614 if (_last_compile_type == osr_compile) {
2615 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2616 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2617 } else {
2618 tty->print_cr("Last parse: %d+++(%d) %s",
2619 _compilation_id, _last_compile_level, _last_method_compiled);
2620 }
2621 }
2622 }
2623
2624 // Print general/accumulated JIT information.
2625 void CompileBroker::print_info(outputStream *out) {
2626 if (out == NULL) out = tty;
2627 out->cr();
2628 out->print_cr("======================");
2629 out->print_cr(" General JIT info ");
2630 out->print_cr("======================");
2631 out->cr();
2632 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2633 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2634 out->cr();
2635 out->print_cr("CodeCache overview");
2636 out->print_cr("--------------------------------------------------------");
2637 out->cr();
2638 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2639 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2640 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2641 out->cr();
2642
2643 out->cr();
2644 out->print_cr("CodeCache cleaning overview");
2645 out->print_cr("--------------------------------------------------------");
2646 out->cr();
2647 NMethodSweeper::print(out);
2648 out->print_cr("--------------------------------------------------------");
2649 out->cr();
2650 }
2651
2652 // Note: tty_lock must not be held upon entry to this function.
2653 // Print functions called from herein do "micro-locking" on tty_lock.
2654 // That's a tradeoff which keeps together important blocks of output.
2655 // At the same time, continuous tty_lock hold time is kept in check,
2656 // preventing concurrently printing threads from stalling a long time.
2657 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2658 TimeStamp ts_total;
2659 TimeStamp ts;
2660
2661 bool allFun = !strcmp(function, "all");
2662 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2663 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2664 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2665 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2666 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2667 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2668 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2669 bool discard = !strcmp(function, "discard") || allFun;
2670
2671 if (out == NULL) {
2672 out = tty;
2673 }
2674
2675 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2676 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2677 out->cr();
2678 return;
2679 }
2680
2681 ts_total.update(); // record starting point
2682
2683 if (aggregate) {
2684 print_info(out);
2685 }
2686
2687 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2688 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function.
2689 // When we request individual parts of the analysis via the jcmd interface, it is possible
2690 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2691 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2692 // across user interaction.
2693 ts.update(); // record starting point
2694 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2695 out->cr();
2696 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds());
2697 out->cr();
2698
2699 if (aggregate) {
2700 // It is sufficient to hold the CodeCache_lock only for the aggregate step.
2701 // All other functions operate on aggregated data - except MethodNames, but that should be safe.
2702 // The separate CodeHeapStateAnalytics_lock protects the printing functions against
2703 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock.
2704 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2705 // leading to an unnecessarily long hold time of the CodeCache_lock.
2706 ts.update(); // record starting point
2707 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2708 out->cr();
2709 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds());
2710 out->cr();
2711
2712 ts.update(); // record starting point
2713 CodeCache::aggregate(out, granularity);
2714 out->cr();
2715 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds());
2716 out->cr();
2717 }
2718
2719 if (usedSpace) CodeCache::print_usedSpace(out);
2720 if (freeSpace) CodeCache::print_freeSpace(out);
2721 if (methodCount) CodeCache::print_count(out);
2722 if (methodSpace) CodeCache::print_space(out);
2723 if (methodAge) CodeCache::print_age(out);
2724 if (methodNames) CodeCache::print_names(out);
2725 if (discard) CodeCache::discard(out);
2726
2727 out->cr();
2728 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds());
2729 out->cr();
2730 }